Plate for cooking apparatus, cooking apparatus and manufacturing method for same

Abstract

The plate for a cooking apparatus comprises: a ceramic glass; and an upper uneven layer on the upper side of the ceramic glass and a lower uneven layer on the lower side of the ceramic glass, wherein the surface of the upper uneven layer and the surface of the lower uneven layer may include a chemically strengthened region.

Description

Plate for cooking appliance, cooking appliance and manufacturing method thereof

[0001] The present disclosure relates to a plate for a cooking appliance, a cooking appliance, and a method for manufacturing the same.

[0002] Induction devices (induction heating devices) are used as heat sources to generate heat. In particular, cooktops (or hobs) are used as cooking appliances to heat food using induction devices.

[0003] Typically, the upper portion of cooktops is made of ceramic glass, which boasts excellent heat resistance. Ceramic glass rarely fractures under thermal shock and boasts excellent mechanical strength and thermal conductivity. However, because ceramic glass in cooktops is constantly exposed to high temperatures and physical impacts, mechanical strength and heat resistance are increasingly required. Therefore, research is being conducted to utilize various coating layers to improve these properties.

[0004] The present disclosure can provide a plate for a cooking appliance with improved strength, a cooking appliance, and a method for manufacturing the same.

[0005] The present disclosure can provide a plate for a cooking appliance with improved heat resistance, a cooking appliance, and a method for manufacturing the same.

[0006] The problems to be solved by the present invention are not limited to the problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0007] A cooking plate according to one aspect of the present disclosure includes a cooking area, the cooking plate including ceramic glass and an upper uneven layer on an upper side of the ceramic glass and a lower uneven layer on a lower side of the ceramic glass, wherein a surface of the upper uneven layer and a surface of the lower uneven layer may include a chemically strengthened region.

[0008] A method for manufacturing a plate for a cooking appliance according to one aspect of the present disclosure may include a step of manufacturing a ceramic glass precursor, a step of heating the ceramic glass precursor to form crystals, a step of cooling the ceramic glass in which the crystals are formed, a step of blasting the cooled ceramic glass, a step of etching the upper and lower sides of the blasted ceramic glass, and a step of polishing the etched ceramic glass.

[0009] A cooking appliance according to one aspect of the present disclosure comprises a plate including a plurality of cooking zones on which cooking vessels are placed, a case formed in the plate between the plurality of cooking zones and configured to accommodate a fan disposed under the plate and capable of drawing air through the through holes, wherein the plate includes ceramic glass and an upper uneven layer on an upper side of the ceramic glass and a lower uneven layer on a lower side of the ceramic glass, and surfaces of the upper uneven layer and the lower uneven layer may include a chemically strengthened region.

[0010] According to the idea of ​​the present disclosure, a cooking plate (11) includes a cooking area, a ceramic glass (1000), an upper uneven layer (1001) on the upper side of the ceramic glass (1000), and a lower uneven layer (1002) on the lower side of the ceramic glass, and a surface of the upper uneven layer (1001) and a surface of the lower uneven layer (1002) can include a chemically strengthened region (1003), thereby forming a uniform compressive stress of the ceramic glass to secure excellent mechanical strength, thereby solving the problem of the prior art in which strength was weak in a through hole, which is a hole-processing portion of the glass.

[0011] In addition, according to the idea of ​​the present disclosure, the plate (11) for a cooking appliance can include at least one of Cr, Cu, Si, and Ni as a color layer (1006), and can provide a glass that can simultaneously secure heat resistance and color diversity by replacing the organic-inorganic hybrid type printing layer that could not be applied to gray or beige colored glass due to poor heat resistance in the past.

[0012] The effects that can be obtained from the present disclosure are not limited to the effects mentioned above, and other effects that are not mentioned can be clearly understood by a person having ordinary skill in the art to which the present disclosure belongs from the description below.

[0013] FIG. 1 is a drawing showing a cross-section of a plate for a cooking appliance according to one embodiment of the present invention.

[0014] FIG. 2 is a cross-sectional view of a plate for a cooking appliance according to one embodiment of the present invention.

[0015] FIG. 3 is a drawing illustrating a chemically strengthened region formed on a rough layer of a plate for a cooking appliance according to one embodiment of the present invention.

[0016] FIG. 4 is a drawing showing a flowchart of a method for manufacturing a cooking appliance according to one embodiment of the present invention.

[0017] Figure 5 is a perspective view of a cooking appliance according to one embodiment of the present invention.

[0018] Figure 6 is a schematic exploded view of a cooking appliance according to one embodiment of the present invention.

[0019] Figure 7 is a photograph showing the results of a drop test of a plate for a cooking appliance according to a comparative example.

[0020] FIG. 8 is a photograph showing the results of a drop test of a plate for a cooking appliance according to one embodiment of the present invention.

[0021] Figure 9 is a photograph showing the results of a drop test of a plate for a cooking appliance according to a comparative example.

[0022] FIG. 10 is a photograph showing the results of a drop test of a plate for a cooking appliance according to one embodiment of the present invention.

[0023] Figure 11 is a photograph showing the results of a heat resistance test of a plate for a cooking appliance according to a comparative example.

[0024] It should be understood that the various embodiments and terms used in this document are not intended to limit the technical features described in this document to specific embodiments, but rather to include various modifications, equivalents, or substitutes of the embodiments.

[0025] In connection with the description of the drawings, similar reference numerals may be used for similar or related components.

[0026] The singular form of a noun corresponding to an item may include one or more of said items, unless the relevant context clearly indicates otherwise.

[0027] In this document, each of the phrases "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 that phrase, or all possible combinations thereof.

[0028] The term “and / or” includes any combination of a plurality of related described elements or any one of a plurality of related described elements.

[0029] The terms "part," "module," and "member" may be implemented in hardware or software. Depending on the embodiments, multiple "parts," "modules," or "members" may be implemented as a single component, or a single "part," "module," or "member" may include multiple components.

[0030] Terms such as "first," "second," or "first" or "second" may be used simply to distinguish one component from another and do not qualify the components in any other respect (e.g., importance or order).

[0031] When a component (e.g., a first component) is referred to as being "coupled" or "connected" to another component (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0032] The terms “include” or “have” are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in this document, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0033] When a component is said to be “connected,” “coupled,” “supported,” or “in contact with” another component, this includes not only cases where the components are directly connected, coupled, supported, or in contact, but also cases where the components are indirectly connected, coupled, supported, or in contact through a third component.

[0034] When we say that a component is "on" another component, this includes not only cases where the component is in contact with the other component, but also cases where there is another component between the two components.

[0035] Meanwhile, the terms "front", "back", "left", "right", "upper", "lower", etc. used in the following description are defined based on the drawing, but the shape and position of each component are not limited by the above terms. For example, the front side may be defined as the +X side, and the rear side may be defined as the -X side. For example, based on the drawing, the right side may be defined as the +Y side, and the left side may be defined as the -Y side. For example, based on the drawing, the upper side may be defined as the +Z side, and the lower side may be defined as the -Z side.

[0036] Hereinafter, embodiments according to the present invention will be described in detail with reference to the attached drawings.

[0037] FIG. 1 is a drawing showing a cross-section of a plate for a cooking appliance according to one embodiment of the present invention, FIG. 2 is a drawing showing a cross-section of a plate for a cooking appliance according to one embodiment of the present invention, and FIG. 3 is a drawing showing a chemical strengthening area formed in a rough layer (a of FIG. 2) of a plate for a cooking appliance according to one embodiment of the present invention.

[0038] Referring to FIG. 2, a cooking plate (11) according to one embodiment of the present disclosure includes a ceramic glass (1000), an upper uneven layer (1001) on the upper side of the ceramic glass (1000), and a lower uneven layer (1002) on the lower side of the ceramic glass, and a surface of the upper uneven layer (1001) and a surface of the lower uneven layer (1002) may include a chemically strengthened region (1003). In this way, a dual etching process is performed so that uneven layers are formed on both sides of the ceramic glass (1000), and additionally, a chemically strengthened region (1003) is formed on the surface of the uneven layers (1001, 1002) by an ion exchange method, thereby forming a uniform compressive stress, whereby the mechanical strength of the ceramic glass (1001) can be improved. In the present invention, the upper uneven layer (1001) and the lower uneven layer (1002) refer to convex curved portions formed on the upper and lower surfaces of the glass, and in Fig. 3, only a part of the upper uneven layer (1001) and the lower uneven layer (1002) is shown, but all of the above-described curved portions may correspond to the uneven layer. In addition, referring to Fig. 3, the chemically strengthened region (1003) is K + or Na + This may refer to a portion where ions such as these enter the glass surface and form a region, and in the case of this chemically strengthened region (1003), the compressive stress of the glass can be measured using a compressive stress meter to determine that the chemically strengthened region (1003) is formed, and the depth of the chemically strengthened region can be measured using SIMS. In Fig. 2, only a portion of the upper uneven layer (1001) is indicated by a to indicate the chemically strengthened region (1003) in Fig. 3, but chemically strengthened regions (1003) of the same or similar shape may be formed in other portions corresponding to the upper uneven layer (1001) and portions corresponding to the lower uneven layer (1002).

[0039] According to one embodiment of the present disclosure, a plate (11) for a cooking appliance may have a flexural strength of 120 MPa or more, and may have a drop breakage rate of 10% or less when a 535 g iron ball is dropped from a height of 1000 mm. According to one embodiment of the present invention, since both sides of a glass ceramic (1000) can have uniform compressive stress through a dual etching and chemical strengthening treatment process, a plate (11) for a cooking appliance of uniform quality can be provided compared to conventional glass ceramics that cannot secure uniform strength due to a large deviation in mechanical strength depending on the manufacturer or manufacturing method, and the improved mechanical strength can ensure the safety of the user in the actual use of the cooking appliance, and the service life of the cooking appliance can be improved.

[0040] According to one embodiment of the present disclosure, a plate (11) for a cooking appliance may further include a through hole (12), and the through hole (12) may have a horizontal width of 40 mm to 120 mm, a vertical length of 60 mm to 130 mm, and an R value of an edge of R1.5 (mm) or more, a bending strength of 98 MPa or more, and a breakage rate of 10% or less when a 535 g iron ball is dropped from a height of 800 mm. According to one embodiment of the present invention, a through hole (12) is formed in the plate (11) for a cooking appliance, so that the air around the cooktop (10) or air containing contaminants generated during the cooking process can be sucked in, while ensuring the safety of the user during actual use and ensuring an excellent mechanical strength of 98 MPa or more so as to ensure the service life of the cooking appliance.

[0041] A plate (11) for a cooking appliance according to one embodiment of the present disclosure may further include an upper printed layer (1004) on the upper side of the upper uneven layer (1001). The upper printed layer (1004) according to one embodiment of the present invention may include a display layer capable of displaying information when the cooking appliance (1) is in use.

[0042] According to one embodiment of the present disclosure, a cooking appliance plate (11) further includes a lower printed layer (1005) on the lower side of the lower uneven layer (1002), and the lower printed layer (1005) may further include a color layer (1006) and a heat-resistant shielding layer (1007) on the lower side of the color layer (1006), and the color layer (1006) may include at least one of Cr, Cu, Si, and Ni, and the color deviation (ΔE) after heating the ceramic glass (1000) at a temperature of 350°C or more and 450°C or less for 12 hours or more and 14 hours or less may be 2.0 or less. According to one embodiment of the present invention, heat resistance is improved by including a heat-resistant printing step using inorganic ink in the color layer (1006), so that even if cooking for a long time in a high-temperature environment, which is an actual use environment of a cooking appliance, the amount of discoloration is reduced, and a cooking appliance plate (11) with improved safety and lifespan can be provided.

[0043] Next, a method for manufacturing a plate (11) for a cooking appliance according to one embodiment of the present invention will be described.

[0044] FIG. 4 is a drawing showing a flowchart of a method for manufacturing a cooking appliance according to one embodiment of the present invention.

[0045] A method for manufacturing a plate (11) for a cooking appliance according to one embodiment of the present disclosure may include a step (S1) of manufacturing a ceramic glass (1000) precursor, a step (S2) of heating the ceramic glass (1000) precursor to generate crystals, a step (S3) of cooling the ceramic glass (1000) in which the crystals are generated, a step (S4) of blasting the cooled ceramic glass, a step (S5) of etching the upper and lower sides of the blasted ceramic glass, and a step (S6) of polishing the etched ceramic glass.

[0046] According to one embodiment of the present invention, the step (S1) of manufacturing the ceramic glass (1000) precursor and the step (S2) of heating the ceramic glass (1000) precursor to generate crystals generate nuclei for crystallization in the ceramic glass through the first heating step, and in the second heating step, crystallization can proceed based on the nuclei. If the temperature of the crystal generation step is too low or the holding time is too short, crystals are not sufficiently generated, which may result in a decrease in color clarity and reflectivity. However, if the temperature of the crystal generation step is too high or the holding time is too long, productivity may decrease. Therefore, it is desirable to set the temperature and holding time of the crystal generation step to an appropriate level.

[0047] In addition, according to one embodiment of the present invention, the cooling step (S3) may be cooled to room temperature at a cooling rate of 20°C / min or more. In general, the longer the crystal generation step is performed and the shorter the cooling step is performed, the better the color clarity of the ceramic glass is; however, the more unevenness occurs on the ceramic glass surface, which reduces cleanability. Therefore, the cooling step is generally not performed for a short time. However, in a method for manufacturing ceramic glass according to one embodiment of the present invention, the cooling step is performed at a fast cooling rate of 20°C / min or more, thereby shortening the cooling step time to improve color clarity, while also improving cleanability through the polishing step. After the cooling step (S3), a masking step may be additionally performed, and the display unit may be masked at a Lami speed of 2 to 4 m / min, a Lami tension of 10 to 20%, and an air pressure of 0.6 to 0.8 MPa.

[0048] In addition, after the step (S3) of cooling the ceramic glass (1000), the surface roughness and glossiness can be controlled by including the step (S4) of blasting the cooled ceramic glass, the step (S5) of etching the upper and lower sides of the blasted ceramic glass, and the step (S6) of polishing the etched ceramic glass. In the past, when etching was performed on only one side of the glass to improve cleanability, the compressive stress of the glass was not formed symmetrically, resulting in a large deviation in strength. However, in the etching step (S5) according to an embodiment of the present invention, both the upper and lower sides of the ceramic glass are etched to form a uniform compressive stress, thereby improving the mechanical strength and ensuring a plate (11) of uniform quality. In addition, in the polishing step (S6), after applying an abrasive to a polishing pad (Softbuff), the molded ceramic glass surface can be polished, thereby making the ceramic glass surface smoother and maximizing cleanability.

[0049] A method for manufacturing a plate (11) for a cooking appliance according to one embodiment of the present disclosure may further include a step (S7) of chemically strengthening the upper surface and the lower surface of the polished ceramic glass (1000). The chemically strengthening step (S7) may include a step of treating the upper surface and the lower surface of the ceramic glass (1000) with a strengthening salt containing at least one of NaNO3 or KNO3 at a concentration of 90 to 100 wt% at a temperature of 350°C to 450°C for 1 hour to 12 hours, preferably, in the case of a black disc ceramic glass (1000), for 8 hours to 12 hours, and in the case of a transparent disc ceramic glass (1000), for 1 hour to 5 hours, by treating the chemically strengthening step (S7) on both sides of the ceramic glass (1000), the strength of the glass ceramic (1000) can be further improved.

[0050] A method for manufacturing a plate (11) for a cooking appliance according to one embodiment of the present disclosure may further include a step (S8) of printing an upper printing layer (1004) on the upper side of the chemically strengthened ceramic glass (1000), a step (S8) of printing a color layer (1006) on the lower side of the chemically strengthened ceramic glass (1000), and a step (S8) of printing a heat-resistant shielding layer (1007) on the lower side of the color layer (1006).

[0051] In a method for manufacturing a cooking appliance plate (11) according to one embodiment of the present disclosure, the step (S8) of printing the color layer (1006) may include a step of heating the ceramic glass (1000) at a temperature of 500°C or more and 800°C or less for 5 minutes or more and 15 minutes or less, and the step (S8) of printing the heat-resistant shielding layer (1007) may include a step of heating the ceramic glass (1000) at a temperature of 200°C or more and 300°C or less for 10 minutes or more and 20 minutes or less. In addition, an inorganic ink containing at least one of Cr, Cu, Si, and Ni may be used for the color layer (1006), and by performing heat-resistant printing under the above conditions using such an inorganic ink, a cooking appliance plate (11) with less discoloration and improved safety and lifespan may be manufactured.

[0052] A method for manufacturing a plate (11) for a cooking appliance according to one embodiment of the present disclosure may further include a step (S9) of coating the upper side of the ceramic glass (1000), thereby preventing contamination of the plate (11). The coating step (S9) may be performed by applying a coating solution to the entire upper side of the ceramic glass (1000) and then drying at 600 to 800°C for 5 to 15 minutes. If the drying temperature is low or the drying time is short, the coating layer may not be formed uniformly. However, if the drying temperature is too high or the drying time is long, cracks may occur on the surface of the coating layer.

[0053] Next, a cooking appliance (1) according to one embodiment of the present invention will be described. However, a description of the plate (11) for the cooking appliance described above will be omitted below.

[0054] FIG. 5 is a perspective view of a cooking appliance according to one embodiment, and FIG. 6 is a schematic exploded view of a cooking appliance according to one embodiment of the present invention.

[0055] A cooking appliance (1) according to one embodiment of the present disclosure includes a plate (11) including a plurality of cooking regions on which cooking containers are placed, a through hole (12) formed in the plate (11) between the plurality of cooking regions, and a case (13) provided to accommodate a fan (18) disposed under the plate (11) and capable of sucking air through the through hole (12), wherein the plate (11) includes a ceramic glass (1000) and an upper uneven layer (1001) on an upper side of the ceramic glass (1000) and a lower uneven layer (1002) on a lower side of the ceramic glass (1000), and surfaces of the upper uneven layer (1001) and the lower uneven layer (1002) may include a chemically strengthened region (1003).

[0056] The cooking appliance (1) may include a cooktop (10). The cooktop (10) may be provided to cook food. The cooktop (10) may be provided to heat food.

[0057] The cooktop (10) may include a plate (11) on which a cooking vessel may be placed. For example, the plate (11) may have a substantially flat shape. For example, the plate (11) may include a tempered glass such as ceramic glass, and as described above, the plate (11) includes a ceramic glass (1000) and an upper uneven layer (1001) on the upper side of the ceramic glass (1000) and a lower uneven layer (1002) on the lower side of the ceramic glass (1000), and the surfaces of the upper uneven layer (1001) and the lower uneven layer (1002) may include a chemically strengthened region (1003).

[0058] The cooktop (10) may include a through hole (12). The through hole (12) may be formed in the plate (11). The through hole (12) may be provided to penetrate the plate (11). For example, the through hole (12) may be formed at approximately the center of the plate (11). The through hole (12) may suck in air around the cooktop (10). The through hole (12) may suck in air containing contaminants generated during the cooking process. Here, the contaminants may include harmful gases, combustion gases, fine dust, oil mist, heat, and / or odors generated during cooking.

[0059] The cooktop (10) may include a user interface (14) provided on the plate (11). The user interface (14) may be provided to receive commands from a user. The user interface (14) may be provided to display various information of the cooking appliance (1). The user interface (14) may be provided as an area through which at least a portion of the display assembly (15) described below is transparent and displayed to the user.

[0060] The cooktop (10) may include a case (13). The case (13) may be provided below the plate (11). The case (13) may be coupled to the lower part of the plate (11).

[0061] The case (13) may include a shape with a substantially open upper portion. For example, the case (13) may include a bottom portion (13a) and a side portion (13b) extending upward from the bottom portion (13a).

[0062] The case (13) may be provided to accommodate various components constituting the cooktop (10). The case (13) may accommodate electrical components. The case (13) may accommodate a display assembly (15) to be described later. The case (13) may accommodate a heating unit (16) to be described later. The case (13) may accommodate a printed circuit board assembly (17) to be described later. The case (13) may include a fan (18) to be described later.

[0063] The cooktop (10) may include a display assembly (15). The display assembly (15) may be configured to implement a user interface (14). The display assembly (15) may be arranged to correspond to the user interface (14). For example, the display assembly (15) may be configured as a printed board assembly (PBA) including a display panel, a switching element, an integrated circuit element, etc., and a printed circuit board (PCB) on which these are installed.

[0064] The cooktop (10) may include a heating element (16). The heating element (16) may be arranged to heat the plate (11). For example, the heating element (16) may include a coil (16a). A current whose magnitude changes over time may be applied to the coil (16a). As the current is applied to the coil (16a), a magnetic field may be formed around the coil (16a). As the current applied to the coil changes, the magnetic field formed around the coil (16a) may also change. An eddy current may flow according to the change in the magnetic field on the surface of the cooking vessel in contact with the plate (11), thereby heating the cooking vessel.

[0065] In the drawing, the cooktop (10) is depicted as an induction electric cooktop, but the present disclosure is not limited thereto. The type of cooktop (10) is not limited as long as it can heat a cooking vessel. For example, the cooktop (10) may be configured as a gas range, a highlighter, a hybrid, or an oven.

[0066] The cooktop (10) may include a printed board assembly (PBA) (17). The printed board assembly (17) may be provided to supply driving current to the heating unit (16). The printed board assembly (17) may be provided to implement a circuit for the operation of the heating unit (16). The printed board assembly (17) may include various components and / or circuits for supplying driving current to the heating unit (16).

[0067] The cooktop (10) may include a fan (18). The fan (18) may be provided for heat dissipation inside the case (10). The fan (18) may blow outside air to lower the temperature of the printed circuit board assembly (17) and / or the display assembly (15). The fan (18) may draw in outside air. The fan (18) may exhaust air flowing inside the case (13). Outside air drawn into the case (13) through the fan (18) may cool the inside of the case (13) and then be exhausted to the outside of the case (13).

[0068] For example, a suction hole (19a) and a discharge hole (19b) may be formed in the case (13). For example, the suction hole (19a) may be formed in the bottom portion (13a) of the case (13). For example, the discharge hole (19b) may be formed in the side portion (13b) of the case (13). External air may be drawn into the case (13) through the suction hole (19a) by the blowing force of the fan (18) and then discharged to the outside of the case (13) through the discharge hole (19b). In the drawing, the suction hole (19a) and the discharge hole (19b) are illustrated as being formed in multiple numbers, but the present disclosure is not limited thereto. There is no limitation on the number of each of the suction holes (19a) and the discharge holes (19b).

[0069] The cooking device (1) may include a hood (20). The hood (20) may be provided to allow air introduced through the through-hole (12) to flow. The hood (20) may be provided to guide the air introduced through the through-hole (12). The hood (20) may be provided to exhaust or circulate the air introduced through the through-hole (12). The hood (20) may exhaust the air introduced through the through-hole (12) to the outside of a space (e.g., indoors) in which the cooking device (1) is installed. The hood (20) may recirculate the air introduced through the through-hole (12) back into the space (e.g., indoors) in which the cooking device (1) is installed. In summary, the hood (20) may guide the air introduced through the through-hole (12) to the outside or to the inside. As will be described later, at least one filter (61 and / or 71) may be provided inside the hood (20), and air flowing through the hood (20) may be filtered by passing through at least one filter (61 and / or 71). Air passing through at least one filter (61 and / or 71) may be discharged to the outdoors or introduced into the indoors by the hood (20).

[0070] The hood (20) may be placed under the plate (11). The hood (20) may be placed under at least a portion of the cooktop (10). The hood (20) may be placed under the bottom portion (13a) of the case (13). However, the present disclosure is not limited thereto, and the cooktop (10) and the hood (20) may be formed integrally.

[0071] By placing the hood (20) under the cooktop (10), the upper space where the cooking device (1) is installed can be secured. The upper portion of the cooking device (1) is provided as an empty space, so that the cooking space is secured and the cooking environment can be improved.

[0072] The hood (20) may include a chamber housing (30). The chamber housing (30) may be positioned below the plate (11). The chamber housing (30) may be detachably coupled to at least a portion of the lower portion of the cooktop (10). For example, the chamber housing (30) may be detachably coupled to the bottom portion (13a) of the case (13).

[0073] The chamber housing (30) may be provided to receive air introduced through the through-hole (12). The chamber housing (30) may be provided to form a chamber (31) through which air can flow. The chamber (31) may include a passage for guiding air into a space provided inside the chamber housing (30). As will be described later, the air introduced through the through-hole (12) may be guided by the frame (210) and flow into the chamber housing (30).

[0074] Various components may be placed in the chamber (31). For example, at least one filter (61 and / or 71) may be placed in the chamber (31). For example, a fan device (50) to be described later may be placed in the chamber (31). For example, a tray (80) to be described later may be placed in the chamber (31).

[0075] The chamber housing (30) may be provided to connect the cooktop (10) and the duct (40). The chamber housing (30) may guide air sucked in through the through hole (12) to the duct (40). For example, the chamber housing (30) may include a chamber discharge port (35) through which air flows out from the chamber housing (30). The chamber discharge port (35) may be connected to the duct (40).

[0076] The hood (20) may include a duct (40). The duct (40) may receive air discharged from the chamber housing (30). The duct (40) may guide the air discharged from the chamber housing (30) to the outside or to a space in which the cooking device (1) is installed. For example, one end of the duct (40) may be connected to a chamber discharge port (35) of the chamber housing (30). For example, the other end of the duct (40) may be connected to the outdoors or indoors. Accordingly, the duct (40) may discharge air that is drawn in through the through-hole (12) and then filtered through at least one filter (61 and / or 71) to the outdoors or recirculate it indoors.

[0077] Although the drawing depicts the chamber housing (30) and the duct (40) as separate components, the present disclosure is not limited thereto. Depending on various factors such as the type of cooktop (10) and the installation space, the chamber housing (30) and the duct (40) may be provided as an integrated component.

[0078] The cooking appliance (1) may include a fan device (50). The fan device (50) may be disposed within the hood (20). Although the drawing illustrates the fan device (50) as being housed in the chamber housing (30), the present disclosure is not limited thereto. For example, the fan device (50) may be housed in the duct (40). For example, the fan device (50) may be provided as a component of the hood (20).

[0079] The fan device (50) may include a fan (51). The fan (51) may be configured to force air flow. The fan (51) may generate suction force. The air may flow into the cooking device (1) through the through-hole (12) by the suction force of the fan (51).

[0080] The fan device (50) may include a fan motor (53). The fan motor (53) may be arranged to drive a fan (51). The fan motor (53) may provide rotational force to the fan (51).

[0081] The fan device (50) may include a fan housing (52). The fan housing (52) may be provided to cover the fan (51) and the fan motor (53). The fan housing (52) may be provided to accommodate the fan (51) and the fan motor (53).

[0082] The cooking appliance (1) may include at least one filter (61 and / or 71).

[0083] The cooking appliance (1) may include a first filter (61). The cooking appliance (1) may include a first filter bracket (62) on which the first filter (61) is mounted. The first filter (61) may be provided to filter air sucked in through the through-hole (12). The first filter (61) and the first filter bracket (62) may be disposed inside the hood (20). For example, the first filter (61) and the first filter bracket (62) may be disposed in the chamber (31). For example, the first filter bracket (62) may be detachably coupled to the frame (210).

[0084] The cooking appliance (1) may include a second filter (71). The cooking appliance (1) may include a second filter bracket (72) on which the second filter (71) is mounted. The second filter (71) may be provided to filter air passing through the first filter (61). The second filter (71) may be disposed downstream of the first filter (61) along the direction of air flow. The second filter (71) and the second filter bracket (72) may be disposed inside the hood (20). For example, the second filter (71) and the second filter bracket (72) may be disposed in the chamber (31). For example, the second filter bracket (72) may be detachably coupled to the chamber housing (30).

[0085] For example, at least one of the first filter (61) or the second filter (62) may be a grease filter for removing oil particles contained in the air. For example, at least one of the first filter (61) or the second filter (62) may be a deodorizing filter for removing odor particles contained in the air.

[0086] Meanwhile, the first filter (61) and the first filter bracket (62) may be referred to as a first filter assembly. For example, the first filter assembly may be provided as a component of the hood (20). The second filter (72) and the second filter bracket (72) may be referred to as a second filter assembly. For example, the second filter assembly may be provided as a component of the hood (20).

[0087] The cooking device (1) may include a tray (80). The tray (80) may accommodate foreign substances such as powder, crumbs, and water generated during cooking. The tray (80) may be disposed at the lower portion of the first filter assembly. The tray (80) may be disposed inside the chamber housing (30). For example, the tray (80) may be mounted on the bottom surface inside the chamber housing (30). For example, the tray (80) may be provided as a component of the hood (20).

[0088] For example, the tray (80) may include a user-gripable handle (81). For example, the user may pull the tray (80) out of the chamber housing (30) or insert the tray (80) into the chamber housing (30) while holding the handle (81). For example, the handle (81) may have a shape that protrudes toward the through hole (12).

[0089] The cooking appliance (1) may include a cover (100). The cover (100) may be provided to cover or open the through hole (12). The cover (100) may be provided to be movable to cover or open the through hole (12). The cover (100) may be provided to be rotatable to cover or open the through hole (12).

[0090] Referring to the above drawings, a cooking appliance (1) according to one embodiment of the present invention has been described.

[0091] Below, examples and comparative examples are described to aid understanding of the present invention. However, the following descriptions are merely examples of the content and effects of the present invention, and the scope and effects of the present invention are not necessarily limited thereto.

[0092]

[0093] {Example}

[0094] <Measurement of hardness and strength according to chemical strengthening time>

[0095] Hardness and strength measurements according to chemical strengthening time are shown in Table 1 below for the Vickers hardness (Hv) and flexural strength (MPa) according to the chemical strengthening time (h) of the black ceramic glass plate with through holes formed according to the conditions of the manufacturing method of the present invention.

[0096] Chemical hardening time (h) Vickers hardness (Hv) Flexural strength (MPa) 0 7 5 0 6 6.2 4 8 0 0 8 0.2 6 1 1 3 3 9 5.1 8 1 1 7 3 1 0 2. 4 1 0 1 1 3 7 1 0 3.1 1 2 1 1 2 0 9 8

[0097] Referring to Table 1 above, it can be confirmed that the ceramic glass manufactured according to the manufacturing conditions of the present invention has an excellent flexural strength of 98 MPa or more and a Vickers hardness of 1120 Hv even though a through hole is formed.

[0098] Falling Ball Test 1

[0099] Drop test 1 was performed by dropping a 535g iron ball vertically on a glass without a through hole while changing the height to check for damage. If damaged, it was marked as NG, and if not damaged, it was marked as OK. The comparative example in Table 2 is a black ceramic glass without a through hole manufactured according to a conventional manufacturing method, and the example in Table 3 is a transparent ceramic glass without a through hole that was subjected to an etching process and chemical strengthening treatment on both sides according to the manufacturing method of the present invention, and the example in Table 4 is a black ceramic glass without a through hole that was subjected to an etching process and chemical strengthening treatment on both sides according to the manufacturing method of the present invention.

[0100] Height (cm)ResultComparison Example 1110 OKComparison Example 250 NGComparison Example 390 OKComparison Example 470 OKComparison Example 580 OKComparison Example 650 NGComparison Example 750 NGComparison Example 8110 OKComparison Example 970 OKComparison Example 1050 NGComparison Example 1150 NGComparison Example 1250 NGComparison Example 13155 OKComparison Example 1450 NGComparison Example 1570 OKComparison Example 1650 NGComparison Example 1780 OKComparison Example 1870 OKComparison Example 1950 NGComparison Example 2050 NGDefect Rate 10 / 2050%

[0101] Height (cm) Results Example 170 OK Example 270 OK Example 370 OK Example 470 OK Example 570 OK Example 670 OK Example 770 OK Example 870 OK Example 970 OK Example 1070 OK Example 1170 OK Example 1270 OK Example 1370 OK Example 1470 OK Example 1570 OK Example 1670 OK Example 1770 OK Example 1870 OK Example 1970 OK Example 2070 OK Defect rate 0 / 200%

[0102] Height (cm) Result Example 2 160 OK Example 2 260 OK Example 2 360 OK Example 2 460 OK Example 2 560 OK Example 2 660 OK Example 2 760 OK Example 2 860 OK Example 2 960 OK Example 3 060 OK Example 3 160 OK Example 3 260 OK Example 3 360 OK Example 3 460 OK Example 3 560 OK Example 3 660 OK Example 3 760 OK Example 3 860 OK Example 3 960 OK Example 4 060 OK Defect rate 0 / 200%

[0103] In the case of Examples 1 to 20 manufactured by the manufacturing method of the present invention, no defects occurred with a breakage rate of 0% even at a falling height of 70 cm, and in the case of Examples 21 to 40, no defects occurred with a breakage rate of 0% even at a falling height of 60 cm, as can be confirmed through Tables 3 and 4 and Fig. 8. However, in the case of Comparative Examples 1 to 20, breakage occurred even at a height of 50 cm, resulting in a 50% defect rate, as can be confirmed through Table 2 and Fig. 7.

[0104] Falling Ball Test 2

[0105] In order to test the drop limit of glass, a 535g iron ball was dropped vertically from a height of 150cm on transparent ceramic glass without a through hole that had been subjected to an etching process and chemical strengthening treatment on both sides according to the manufacturing method of the present invention, and damage was checked. If damaged, it was NG, and if not damaged, it was OK, as indicated in Table 5 below.

[0106] Height (cm) Results Example 21 150 OK Example 22 150 OK Example 23 150 OK Example 24 150 OK Example 25 150 OK Example 26 150 OK Example 27 150 OK Example 28 150 OK Example 29 150 OK Example 30 150 OK Average 150 OK

[0107] Referring to Table 4 above, it can be confirmed that in the case of Examples 21 to 30 manufactured by the manufacturing method of the present invention, no defects occurred with a breakage rate of 0% even when the ball was dropped from a height of 150 cm.

[0108] Falling Ball Test 3

[0109] In order to test the drop limit of the glass, a 535g iron ball was dropped vertically at the center of the ceramic glass burner eight times in one set at different heights to check for damage. Damage was indicated as NG and no damage was indicated as OK. The results for the limit drop height are shown in Tables 5 and 6 below. Table 6 shows the results for black ceramic glass and transparent ceramic glass with through holes manufactured according to a conventional manufacturing method, and Table 7 shows the results for transparent ceramic glass with through holes manufactured by an etching process and chemical strengthening treatment on both sides according to the manufacturing method of the present invention.

[0110] 514mm600mm700mm800mmResultBlack1OKOKNG-600mmBlack2OKOKOKNG700mmBlack3OKOKNG-600mmTransparent1OKOKNG-600mmTransparent2OKOKNG-514mmTransparent3OKOKOKNG700mm

[0111] 514mm600mm700mm800mm900mm1000mmResultBlack1OKOKOKOKOKOK1000mmBlack2OKOKOKOKOKOK1000mmBlack3OKOKOKOKOKOK1000mmTransparent1OKOKOKOKOKOK1000mmTransparent2OKOKOKOKOKOK1000mmTransparent3OKOKOKOKOKOK1000mm

[0112] Referring to Table 7 and FIG. 10, it was confirmed that the glass manufactured by the manufacturing method of the present invention did not break below 1000 mm, and thus the limit falling height was 1000 mm or more. Referring to Table 6 and FIG. 9, it was confirmed that the glass manufactured by the conventional manufacturing method had a maximum falling height of 700 mm or less, and thus its strength was inferior to that of the present invention.

[0113] Heat resistance test

[0114] In order to evaluate the heat resistance based on the discoloration according to the temperature change of the glass, an empty container was placed on the glass and heated at 450℃ for 12 hours. The discoloration is shown in Table 8 below. In order to compare with the glass manufactured according to the present invention by printing Cr / Cu-based inorganic silane ink on the color layer after double-sided etching and chemical strengthening treatment, dark gray glass from SCHOTT was used, and the color deviation (ΔE) after heating under the above conditions is shown in Table 8 below.

[0115] Color LabΔE Result SCOTT Dark Gray 38.49-0.51-0.54 3.18 OK Invention Black 1132.21-0.45-1.25 0.09 OK

[0116] Referring to Table 8 above, in the case of the glass manufactured according to the present invention, the color deviation was only 0.09 even after heating at 450℃ for 12 hours, but in the case of the glass manufactured by SCOTT, it was 3.18, and discoloration occurred as shown in FIG. 11, confirming that the heat resistance was inferior to that of the present invention. According to one embodiment, a cooking appliance plate (11) includes a cooking area, and includes a ceramic glass (1000) and an upper uneven layer (1001) on the upper side of the ceramic glass (1000) and a lower uneven layer (1002) on the lower side of the ceramic glass, and a surface of the upper uneven layer (1001) and a surface of the lower uneven layer (1002) may include a chemically strengthened region (1003). The cooking appliance plate (11) may have a flexural strength of 120 MPa or more.

[0117] The above cooking appliance plate (11) may have a drop breakage rate of 10% or less when a 535g iron ball is dropped from a height of 1000mm.

[0118] The above cooking appliance plate (11) may further include a through hole (12).

[0119] The plate (11) for the above cooking appliance may have a through hole (12) having a horizontal width of 40 mm or more and 120 mm or less, a vertical length of 60 mm or more and 130 mm or less, and an R value of an edge of R1.5 (mm) or more.

[0120] The above cooking appliance plate (11) may have a bending strength of 98 MPa or more.

[0121] The above cooking appliance plate (11) may have a drop breakage rate of 10% or less when a 535g iron ball is dropped from a height of 800 mm.

[0122] The above cooking appliance plate (11) may further include an upper printed layer (1004) on the upper side of the upper uneven layer (1001).

[0123] The above cooking appliance plate (11) further includes a lower printed layer (1005) on the lower side of the lower uneven layer (1002), and the lower printed layer (1005) may further include a color layer (1006) and a heat-resistant shielding layer (1007) on the lower side of the color layer (1006).

[0124] The plate (11) for the above cooking appliance may include at least one of Cr, Cu, Si, and Ni in the color layer (1006).

[0125] The above cooking appliance plate (11) further includes a through hole (12). After heating the ceramic glass (1000) at a temperature of 350°C or higher and 450°C or lower for 12 hours or higher and 14 hours or lower, the color deviation (ΔE) may be 2.0 or lower.

[0126] A method for manufacturing a plate (11) for a cooking appliance according to one embodiment may include a step (S1) of manufacturing a ceramic glass (1000) precursor, a step (S2) of heating the ceramic glass (1000) precursor to generate crystals, a step (S3) of cooling the ceramic glass (1000) in which the crystals are generated, a step (S4) of blasting the cooled ceramic glass, a step (S5) of etching the upper and lower sides of the blasted ceramic glass, and a step (S6) of polishing the etched ceramic glass.

[0127] The method for manufacturing the above cooking appliance plate (11) may further include a step (S7) of chemically strengthening the upper surface and lower surface of the polished ceramic glass (1000).

[0128] The method for manufacturing the above cooking appliance plate (11) may include a step of strengthening the upper surface and the lower surface of the ceramic glass (1000) with a strengthening salt at a temperature of 350°C or higher and 450°C or lower for 1 hour or longer and 12 hours or shorter, in the chemical strengthening step (S7).

[0129] The method for manufacturing the above cooking appliance plate (11) may include the reinforcing salt including at least one of KNO3 or NaNO3.

[0130] The method for manufacturing the above cooking appliance plate (11) may further include a step (S8) of printing an upper printing layer (1004) on the upper side of the chemically strengthened ceramic glass (1000), a step (S8) of printing a color layer (1006) on the lower side of the chemically strengthened ceramic glass (1000), and a step (S8) of printing a heat-resistant shielding layer (1007) on the lower side of the color layer (1006).

[0131] The method for manufacturing the above cooking appliance plate (11) may include a step (S8) of printing the color layer (1006) including a step of heating the ceramic glass (1000) at a temperature of 500°C or higher and 800°C or lower for 5 minutes or longer and 15 minutes or shorter.

[0132] The method for manufacturing the above cooking appliance plate (11) may include the step (S8) of printing the heat-resistant shielding layer (1007) including the step of heating the ceramic glass (1000) at a temperature of 200°C or higher and 300°C or lower for 10 minutes or longer and 20 minutes or shorter.

[0133] The method for manufacturing the above cooking appliance plate (11) may further include a step (S9) of coating the upper surface of the above ceramic glass (1000).

[0134] A cooking appliance (1) according to one embodiment includes a plate (11) including a plurality of cooking zones on which cooking vessels are placed, a through hole (12) formed in the plate (11) between the plurality of cooking zones, and a case (13) provided to accommodate a fan (18) disposed under the plate (11) and capable of sucking air through the through hole (12), wherein the plate (11) includes a ceramic glass (1000) and an upper uneven layer (1001) on an upper side of the ceramic glass (1000) and a lower uneven layer (1002) on a lower side of the ceramic glass (1000), and surfaces of the upper uneven layer (1001) and the lower uneven layer (1002) may include a chemically strengthened region (1003).

[0135] Above, the cooking plate (11) according to one embodiment, the manufacturing method of the cooking plate (11), and the cooking plate (1) have been described.

[0136] Although the embodiments of the invention disclosed above have been illustrated and described, the disclosed invention is not limited to the specific embodiments described above, and various modifications may be implemented by a person having ordinary skill in the art to which the disclosed invention pertains without departing from the gist claimed in the claims.

[0137] (Explanation of symbols)

[0138] 1: Cooking appliances

[0139] 10: Cooktop

[0140] 11: Plate

[0141] 12: Penetration hole

[0142] 1000: Ceramic glass

[0143] 1001: Upper uneven layer

[0144] 1002: Lower uneven layer

[0145] 1003: Chemical Enhancement Area

[0146] 1004: Upper printing layer

[0147] 1005: Lower printing layer

[0148] 1006: Color layer

[0149] 1007: Heat-resistant shielding layer

Claims

1. In a plate (11) for a cooking appliance including a cooking area, Ceramic glass (1000) and It includes an upper roughened layer (1001) on the upper side of the ceramic glass (1000); and a lower roughened layer (1002) on the lower side of the ceramic glass; A cooking plate (11) including a chemically strengthened region (1003) on the upper surface of the uneven layer (1001) and the lower surface of the uneven layer (1002).

2. In claim 1, A plate (11) for cooking appliances having a bending strength of 120 MPa or more.

3. In claim 1, A plate (11) for cooking appliances having a breakage rate of 10% or less when a 535 g iron ball is dropped from a height of 1000 mm.

4. In claim 1, A cooking plate (11) further comprising a through hole (12).

5. In claim 4, The above through hole (12) is a cooking plate (11) having a horizontal width of 40 mm or more and 120 mm or less, a vertical length of 60 mm or more and 130 mm or less, and an R value of the corner of R1.5 (mm) or more.

6. In claim 5, A plate (11) for cooking appliances having a bending strength of 98 MPa or more.

7. In claim 5, A plate (11) for cooking appliances having a breakage rate of 10% or less when a 535 g iron ball is dropped from a height of 800 mm.

8. In claim 1, A cooking plate (11) further comprising an upper printing layer (1004) on the upper side of the upper uneven layer (1001).

9. In claim 1, Further comprising a lower printed layer (1005) on the lower side of the lower uneven layer (1002), A cooking plate (11) further comprising a color layer (1006) and a heat-resistant shielding layer (1007) on the lower side of the color layer (1006), the lower printing layer (1005).

10. In claim 9, The above color layer (1006) is a cooking appliance plate (11) containing at least one of Cr, Cu, Si and Ni.

11. In claim 10, A plate (11) for a cooking appliance having a color deviation (ΔE) of 2.0 or less after heating the above ceramic glass (1000) at a temperature of 350℃ or more and 450℃ or less for 12 hours or more and 14 hours or less.

12. Step of manufacturing a ceramic glass (1000) precursor (S1); Step (S2) of heating the above ceramic glass (1000) precursor to generate a crystal; Step (S3) of cooling the ceramic glass (1000) in which the above decision is generated; Step (S4) of blasting the above-mentioned cooled ceramic glass; Step (S5) of etching the upper and lower sides of the blasted ceramic glass; and A method for manufacturing a plate (11) for a cooking appliance, comprising a step (S6) of polishing the etched ceramic glass.

13. In claim 12, A method for manufacturing a plate (11) for a cooking appliance, further comprising a step (S7) of chemically strengthening the upper surface and the lower surface of the polished ceramic glass (1000).

14. In claim 13, The above chemical strengthening step (S7) is a method for manufacturing a plate (11) for a cooking appliance, which includes a step of strengthening the upper surface and the lower surface of the ceramic glass (1000) at a temperature of 350°C or higher and 450°C or lower for 1 hour or longer and 12 hours or shorter.

15. In claim 14, The above strengthening salt is KNO 3 or NaNO 3 A method for manufacturing a plate (11) for a cooking appliance comprising at least one of:

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