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KR-102961247-B1 - Cooking appliance

KR102961247B1KR 102961247 B1KR102961247 B1KR 102961247B1KR-102961247-B1

Abstract

A cooking device according to an embodiment of the present disclosure includes a MW heating module that emits microwaves into a cavity and an IH heating module that emits a magnetic field toward the cavity, wherein the IH heating module includes a working coil and a thin film, and the thin film may be disposed between the cavity and the working coil.

Inventors

  • 김원태
  • 전현우
  • 양재경
  • 심성훈
  • 손승호

Assignees

  • 엘지전자 주식회사

Dates

Publication Date
20260508
Application Date
20200224

Claims (15)

  1. Housing with a cavity formed therein; A door connected to the above housing and opening and closing the cavity; MW heating module emitting microwaves into the above cavity; and It includes an IH heating module that emits a magnetic field toward the cavity, The above IH heating module is A working coil that generates the above magnetic field, and It includes a thin film disposed between the above cavity and the above working coil, and The above thin film is heated by the working coil when a non-magnetic object is accommodated in the cavity, and the non-magnetic object is heated by the thin film. The above housing is provided with a plate that forms a first surface of the cavity and contacts the thin film on at least a portion thereof, and A plurality of holes are formed in the above plate, and The plurality of holes are formed in the area of the plate that overlaps with the thin film, and the holes are not formed in the area that does not overlap with the thin film. Cooking appliances.
  2. delete
  3. In paragraph 1, The above thin film is coated over the entire upper surface of the plate or the entire lower surface of the plate. Cooking appliances.
  4. In paragraph 1, The above thin film is positioned to be in contact with a portion of the upper surface of the plate or a portion of the lower surface of the plate. Cooking appliances.
  5. delete
  6. delete
  7. In paragraph 4, The above IH heating module is A cover further comprising the above-mentioned thin film coated Cooking appliances.
  8. In paragraph 1, The above plate is A first plate made of glass material coated with the above-mentioned thin film and a second plate made of iron material formed Cooking appliances.
  9. In paragraph 8, The first plate is disposed on the inner side of the second plate. Cooking appliances.
  10. In paragraph 1, The above IH heating module is A thermal insulation material further comprising disposed between the working coil and the thin film. Cooking appliances.
  11. In paragraph 1, The above MW heating module is The magnetron that generates the above microwaves, and A waveguide comprising a microwave generated in the magnetron to guide the microwave to the cavity Cooking appliances.
  12. In paragraph 1, The above IH heating module emits a magnetic field toward the first surface of the cavity, and The above MW heating module supplies the microwave to the cavity through the second surface of the cavity. Cooking appliances.
  13. In Paragraph 12, The first surface of the above cavity is the bottom surface of the above cavity, and The second surface of the cavity is at least one of the remaining surfaces excluding the bottom surface of the cavity. Cooking appliances.
  14. In Paragraph 12, A grill heater module further comprising supplying radiant heat to the cavity through a third surface of the cavity Cooking appliances.
  15. In paragraph 1, The above thin film has a skin depth deeper than the thickness of the above thin film. Cooking appliances.

Description

Cooking appliance The present disclosure relates to a cooking appliance. Various types of cooking appliances are used to heat food in homes and restaurants. For example, various cooking appliances such as microwave ovens, induction electric ranges, and grill heaters are in use. A microwave oven is a cooking appliance that uses a high-frequency heating method. It utilizes the phenomenon where molecules vibrate intensely in a high-frequency electric field to generate heat, allowing food to be heated evenly in a short period of time. An induction heating electric range is a cooking appliance that heats an object to be heated using electromagnetic induction. Specifically, an induction heating electric range can heat the object itself by generating eddy currents in an object made of metal components using a magnetic field generated around the coil when high-frequency power of a predetermined size is applied to the coil. A grill heater is a cooking appliance that heats food by radiating or convecting infrared heat; because the infrared heat penetrates the food, it can cook it evenly throughout. As such, with the release of cooking appliances utilizing various types of heat sources, the number and variety of appliances owned by users have increased, posing a problem where these appliances occupy a significant amount of space within living areas. Consequently, there is a growing demand from users for multi-functional cooking appliances equipped with multiple heating modules. Furthermore, there is a need to develop cooking appliances that utilize multiple heating methods simultaneously to ensure that food within the object being heated is cooked more uniformly and quickly. Korean Patent Publication No. 10-2008-0037796 (published May 2, 2008) describes a cooking appliance capable of simultaneously using microwave and induction heating coil heat sources. However, conventional cooking appliances have the inconvenience of requiring a separate conductor tray to solve the problem of microwaves heating the induction heating coil. In other words, conventional cooking appliances have a problem in that they cannot heat containers other than the separate conductor tray (e.g., containers made of non-magnetic materials) using the induction heating coil as a heat source. In addition, conventional cooking appliances have a complex structure and increased manufacturing costs because they must be equipped with a separate sensor unit to determine whether a conductor tray is installed, and there is a limitation in that microwave and induction heating coil heat sources cannot be used simultaneously when a conductor tray is not installed. FIG. 1 is a perspective view of a cooking appliance according to an embodiment of the present disclosure. FIG. 2 is a control block diagram of a cooking appliance according to an embodiment of the present disclosure. FIG. 3 is a cross-sectional view of a cooking appliance according to a first embodiment of the present disclosure. Figures 4 and 5 are diagrams illustrating the change in impedance between a thin film and a heated object depending on the type of heated object. FIG. 6 is a cross-sectional view of a cooking appliance according to a second embodiment of the present disclosure. FIG. 7 is a cross-sectional view of a cooking appliance according to a third embodiment of the present disclosure. FIG. 8 is a cross-sectional view of a cooking apparatus according to a fourth embodiment of the present disclosure. Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the attached drawings. In the drawings, the same reference numerals are used to indicate the same or similar components. Hereinafter, a cooking appliance according to an embodiment of the present disclosure will be described. FIG. 1 is a perspective view of a cooking appliance according to an embodiment of the present disclosure. A cooking appliance (1) according to an embodiment of the present disclosure may include a housing (2) and a door (3) connected to the housing (2). A cavity (4) may be formed in the housing (2), and the cavity (4) may be a cooking chamber. The cavity (4) may be a cooking space where an object to be heated is placed. An input interface (50) may be formed on the outer surface of the housing (2). The input interface (50) can receive input from a user to operate the cooking device. The cavity (4) can be opened or closed by the door (3). The door (3) can be attached to the front of the housing (2) so as to be openable and closable. The door (3) can open and close the cavity (4). A window (31) may be formed in the door (3). When the cavity (4) is closed, the user can check the inside of the cavity (4) through the window (31). The window (31) will be described in detail in FIG. 3. The cavity (4) may be formed with a first to fifth surface and may be opened or closed depending on the position of the door (3). The first surface of the cavity (4) may be a bottom surface (4