Electric heating cooking appliance

Abstract

The utility model discloses an electric heating cooking appliance which comprises a heat conduction cooking device, a graphene electric heating film with the surface electrified during working and a pressing piece enabling the graphene electric heating film to be tightly attached to the bottom of the heat conduction cooking device, and an electrode is arranged on the surface of the graphene electric heating film. The graphene electrothermal film is separated from the heat-conducting cooking device through a heat-conducting insulating film, or the heat-conducting cooking device is an insulating part and is in contact with the graphene electrothermal film; the graphene electrothermal film is separated from the pressing piece through a heat insulation insulating film, or the pressing piece is a heat insulation insulating piece and is in contact with the graphene electrothermal film. According to the electric heating cooking appliance, the graphene electric heating film is used for heating, the heat conduction cooking device made of rigid materials and the pressing piece are used for clamping the graphene electric heating film, a compact and thin heating structure is formed, and after the graphene electric heating film is powered on, a user can directly heat food on the heat conduction cooking device.

Description

Technical Field

[0001] The utility model relates to an electric heating cooking utensil. Background Art

[0002] The Chinese patent announcement number CN219645572U applied by our company and published on September 8, 2023, discloses a flexible electric heating film electrode structure, including a controller and a heating element; the heating element includes a graphene heating pad, and the upper surface of the graphene heating pad is provided with two electrodes separated from each other. The graphene heating pad forms a food heating zone between the two electrodes, and the two electrodes are electrically connected to the controller. The graphene heating pad of this structure is mainly made of a mixture of silicone / heat-resistant film-forming material and graphene, and then processed into an electric heating film material using a film-forming process. It has the advantage of being ultra-thin, and by adjusting the formula ratio of materials such as graphene, the resistance can be adjusted so that it emits the required operating temperature during operation.

[0003] Chinese patent announcement number CN 220440945U disclosed on February 2, 2024, a heating structure and a heating device using the heating structure. The heating structure includes a surface layer, a thermally conductive insulating layer, a heating film and a thermally insulating insulating layer stacked and connected in sequence. The heating film includes a conductive layer and conductive components arranged at both ends of the upper surface of the conductive layer. The arrangement of the heating film and the surface layer, the thermally conductive insulating layer and the thermally insulating insulating layer enables the heating structure to have a high heating temperature and good heating uniformity, a wide voltage range that can be connected, and the voltage range that can be connected is 6V to 220V. The heating temperature can be adjusted, and the heating temperature can reach up to 350°C. This structure is an application of the above-mentioned graphene heating pad. However, due to the flexible structure of the graphene heating pad, it is difficult to achieve the graphene heating pad close to the heating working surface, resulting in large heat loss. Utility Model Content

[0004] The purpose of the utility model is to provide an electric heating cooking utensil with reasonable and compact structure.

[0005] The purpose of this utility model is achieved in this way:

[0006] An electric heating cooking appliance includes a heat-conducting cooking device, a graphene electric heating film whose surface is charged during operation, and a pressing piece that makes the graphene electric heating film stick to the bottom of the heat-conducting cooking device. The heat-conducting cooking device and the pressing piece are both rigid parts, and electrodes are provided on the surface of the graphene electric heating film; the graphene electric heating film and the heat-conducting cooking device are separated by a heat-conducting insulating film, or the heat-conducting cooking device is an insulating piece and contacts the graphene electric heating film; the graphene electric heating film and the pressing piece are separated by a heat-insulating insulating film, or the pressing piece is a heat-insulating insulating piece and contacts the graphene electric heating film.

[0007] The purpose of the utility model can also be solved by the following technical measures:

[0008] As a more specific solution, a locking piece is provided at the bottom of the pressing piece, one end of the locking piece passes through the pressing piece and is connected to the bottom of the thermal cooking device, and the pressing piece and the graphene heating film are pressed between the thermal cooking device and the other end of the locking piece.

[0009] As a further solution, the heat-conducting cooking device is a metal plate, a metal plate or a metal container, and a screw hole or a screw is provided at the bottom thereof; the locking part includes a screw or a nut, and the pressing part is a metal plate part, and the metal plate part has an opening corresponding to the screw or the screw, the screw is connected to the screw hole, and the screw head presses the outside of the metal plate part, or the nut is connected to the screw, and the nut presses the outside of the metal plate part.

[0010] As a further solution, the metal plate is a cold plate with a plurality of reinforcing ribs provided on its surface. The locking member further comprises a pressure ring which is press-fitted between the screw head or the nut and the cold plate.

[0011] As a further solution, the locking pieces are distributed around the bottom surface and the center of the pressing piece. There are two graphene heating films, which are separated from each other and avoid the locking piece at the center.

[0012] As a further solution, an upper annular boss is provided around the top surface of the heat-conducting cooking device, and the outer edge of the upper annular boss is provided with a downward curved curling edge; a lower annular boss is provided around the bottom surface of the pressing piece, and the outer edge of the lower annular boss is provided with an upward curved curling edge, and the upper curved curling edge and the lower curved curling edge are abutted or welded.

[0013] As a further solution, the electrode includes a silver adhesion layer, a conductive connection layer and a copper foil layer. The silver adhesion layer is conductively connected to the surface of the graphene heating film, and the copper foil layer is connected to the surface of the silver adhesion layer through the conductive connection layer; the thickness of the graphene heating film is 10μm-70μm, and the thickness of the graphene heating film after being stacked with the heat-conductive cooking device and the pressing piece is 2mm-5mm.

[0014] As a further solution, two graphene heating films are connected in parallel, and a lead-out terminal is provided on the electrode of one of the graphene heating films. A base assembly is provided at the bottom of the pressing piece, and the outer end of the lead-out terminal leads to the base assembly. A control circuit is provided on the base assembly and electrically connected to the lead-out terminal.

[0015] As a further solution, there are two base components, which include a plug and a socket. The plug is fixed at the bottom of the pressure piece, and the socket is plugged into the bottom of the plug; one of the plugs is provided with an upper electrical coupling head, and the corresponding socket is provided with a lower electrical coupling head and the control circuit, and the lead-out end is electrically connected to the upper electrical coupling head.

[0016] As a further alternative, the heat-conducting cooking device and the pressing piece are both metal parts, and the two are welded and fixed; or, the heat-conducting cooking device and the pressing piece are both metal parts, the locking piece is a rivet, one end of the rivet is welded to the bottom of the heat-conducting cooking device, and the other end of the rivet passes through the pressing piece and is riveted.

[0017] The beneficial effects of the utility model are as follows:

[0018] (1) This electric heating cooking appliance uses graphene heating film to generate heat. The graphene heating film is clamped by a heat-conducting cooking device and a pressing piece made of a rigid material to form a compact and thin heating structure. After the graphene heating film is powered on, the user can heat food directly on the heat-conducting cooking device.

[0019] (2) The pressing piece of this electric heating cooking utensil is locked to the bottom of the heat-conducting cooking device through a locking piece. Moreover, due to the action of the locking piece, the pressing piece can tightly press the graphene heating film, so that the heat of the graphene heating film is well transferred to the heat-conducting cooking device, which is convenient for heating and cooking food. It is particularly suitable for use as a baking tray. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic cross-sectional view of the first embodiment of the present invention.

[0021] Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle.

[0022] Figure 3 This is a schematic top view of the structure of the second embodiment of the present invention.

[0023] Figure 4 for Figure 3 Schematic diagram of BB cross-sectional structure.

[0024] Figure 5 for Figure 4 Enlarged structural diagram at point C in the middle.

[0025] Figure 6 for Figure 5 Enlarged structural diagram at point D in the middle.

[0026] Figure 7 This is a bottom view of the second embodiment of the present invention.

[0027] Figure 8 This is a front view of the second embodiment of the utility model and a schematic diagram of the exploded structure of the second embodiment and the socket.

[0028] Figure 9 for Figure 8 Schematic diagram of the left view structure.

[0029] Figure 10This is a schematic diagram of the graphene electric heating film structure in the second embodiment of the present utility model.

[0030] Figure 11 for Figure 10 Schematic diagram of EE cross-sectional structure. DETAILED DESCRIPTION

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0032] Example 1, see Figure 1-Figure 2 As shown, an electric heating cooking appliance includes a heat-conducting cooking device 2, a graphene heating film 1 whose surface is charged during operation, and a pressing member 3 that holds the graphene heating film 1 in close contact with the bottom of the heat-conducting cooking device 2. Both the heat-conducting cooking device 2 and the pressing member 3 are rigid components. Electrodes 4 are provided on the surface of the graphene heating film 1. The heat-conducting cooking device 2 is an insulating component and contacts the graphene heating film 1. The pressing member 3 is a heat-insulating component and contacts the graphene heating film 1. The heat-conducting cooking device 2 is a ceramic plate or a microcrystalline plate, and the pressing member 3 is a mica plate.

[0033] The difference between the second embodiment and the first embodiment is that: Figures 3 to 10 As shown, an electric heating cooking appliance includes a heat-conducting cooking device 2, a graphene electric heating film 1 whose surface is charged when working, and a pressing piece 3 that makes the graphene electric heating film 1 close to the bottom of the heat-conducting cooking device 2. The heat-conducting cooking device 2 and the pressing piece 3 are both rigid parts, and an electrode 4 is provided on the surface of the graphene electric heating film 1; the graphene electric heating film 1 and the heat-conducting cooking device 2 are separated by a heat-conducting insulating film 6, or the heat-conducting cooking device 2 is an insulating part and contacts the graphene electric heating film 1; the graphene electric heating film 1 and the pressing piece 3 are separated by a heat-insulating insulating film 7, or the pressing piece 3 is a heat-insulating insulating part and contacts the graphene electric heating film 1.

[0034] A locking piece 5 is provided at the bottom of the pressing piece 3, one end of the locking piece 5 passes through the pressing piece 3 and is connected to the bottom of the thermal cooking device 2, and the pressing piece 3 and the graphene electric heating film 1 are pressed between the thermal cooking device 2 and the other end of the locking piece 5.

[0035] The heat-conducting cooking device 2 is a metal plate with a connecting post 24 at its bottom, which is provided with a screw hole. The locking member 5 includes a screw 52 and a pressure ring 51. The pressure member 3 is a metal plate (preferably a cold plate, which provides greater rigidity and reduces the chance of deformation). The metal plate has openings corresponding to the screw 52 and the connecting post 24. The connecting post 24 passes through the openings. The pressure ring 51 is mounted on the outside of the screw 52, ​​which is connected to the screw hole. The screw head is pressed against the outer side of the metal plate through the pressure ring 51. The metal plate is a cold plate, and its surface is provided with a plurality of reinforcing ribs 33.

[0036] An upper annular boss 21 is provided around the top surface of the heat-conducting cooking device 2, and a downward curved curling edge 23 is provided on the outer edge of the upper annular boss 21; a lower annular boss 31 is provided around the bottom surface of the pressing piece 3, and an upward curved curling edge 32 is provided on the outer edge of the lower annular boss 31, and the upper curved curling edge 32 is abutted against or welded to the lower curved curling edge 23.

[0037] The locking piece 5 is distributed on the lower annular boss 31 around the bottom surface of the pressing piece 3 and at the center. The graphene electric heating film 1 is provided with two pieces, and the two graphene electric heating films 1 are separated from each other and avoid the locking piece 5 at the center.

[0038] The electrode 4 includes a silver adhesion layer 41, a conductive connection layer 42 and a copper foil layer 43. The silver adhesion layer 41 is conductively connected to the surface of the graphene heating film 1, and the copper foil layer 43 is connected to the surface of the silver adhesion layer 41 through the conductive connection layer 42; the thickness of the graphene heating film 1 is 10μm-70μm, and the thickness of the graphene heating film 1 after being stacked with the heat-conductive cooking device 2 and the pressing piece 3 is 2mm-5mm.

[0039] The graphene electric heating film 1 is mainly formed into a film shape by combining a film-forming material and graphene, and the film-forming material is mainly TPU.

[0040] Two graphene heating films 1 are connected in parallel. The electrode 4 of one graphene heating film 1 is provided with a lead 44. A base assembly is provided at the bottom of the pressing member 3. The outer end of the lead 44 leads to the base assembly. A control circuit is provided on the base assembly and electrically connected to the lead 44. The lead 44 is a copper sheet or copper foil.

[0041] The base assembly comprises two components, each comprising a plug 8 and a socket 9. The plug 8 is fixedly mounted at the bottom of the pressure member 3, and the socket 9 is plugged into the bottom of the plug 8. One of the plugs 8 has an upper electrical coupling head 81, and the corresponding socket 9 has a lower electrical coupling head 92 and the control circuit. The lead-out terminal 44 is electrically connected to the upper electrical coupling head 81. The control circuit may be a power regulation circuit, which has a power regulation knob 93 located outside the corresponding socket 9.

[0042] Specifically, the socket 9 is provided with a plug cavity 91 for mating with the plug 8. The upper electrical coupling head 81 is provided with a conductive pin, the inner end of which is electrically connected to the lead terminal 44 via a terminal 45. The terminal 45 is riveted or welded to the lead terminal 44. The pressure piece 3 is provided with a clearance hole corresponding to the terminal 45 and is insulated from the terminal 45.

[0043] The above is a preferred embodiment of the present invention, which illustrates and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention, which is defined by the appended claims and their equivalents.

Claims

1. An electric heating cooking appliance, comprising a heat-conducting cooking device (2), characterized in that: The invention also includes a graphene electric heating film (1) whose surface is charged during operation, and a pressing piece (3) that makes the graphene electric heating film (1) stick closely to the bottom of the heat-conducting cooking device (2). The heat-conducting cooking device (2) and the pressing piece (3) are both rigid parts, and an electrode (4) is provided on the surface of the graphene electric heating film (1); the graphene electric heating film (1) and the heat-conducting cooking device (2) are separated by a heat-conducting insulating film (6), or the heat-conducting cooking device (2) is an insulating part and contacts the graphene electric heating film (1); the graphene electric heating film (1) and the pressing piece (3) are separated by a heat-insulating insulating film (7), or the pressing piece (3) is a heat-insulating insulating part and contacts the graphene electric heating film (1).

2. The electric heating cooking appliance according to claim 1, characterized in that: A locking piece (5) is provided at the bottom of the pressing piece (3), one end of the locking piece (5) passes through the pressing piece (3) and is connected to the bottom of the heat-conducting cooking device (2), and the pressing piece (3) and the graphene electric heating film (1) are pressed between the heat-conducting cooking device (2) and the other end of the locking piece (5).

3. The electric heating cooking appliance according to claim 1, characterized in that: The heat-conducting cooking device (2) is a metal plate, a metal plate or a metal container, and a screw hole or a screw is provided at the bottom thereof; the locking member (5) includes a screw (52) or a nut; the pressing member (3) is a metal plate member, and the metal plate member has an opening corresponding to the screw (52) or the screw; the screw (52) is connected to the screw hole, and the screw head presses the outer side of the metal plate member, or the nut is connected to the screw, and the nut presses the outer side of the metal plate member.

4. The electric heating cooking appliance according to claim 3, characterized in that: The metal plate is a cold plate, and a plurality of reinforcing ribs (33) are provided on its surface. The locking member (5) further comprises a pressure ring (51), and the pressure ring (51) is press-fitted between the screw head or the nut and the cold plate.

5. The electric heating cooking appliance according to claim 3, characterized in that: The locking pieces (5) are distributed around the bottom surface and at the center of the pressing piece (3). The graphene electric heating films (1) are provided with two pieces, and the two graphene electric heating films (1) are separated from each other and avoid the locking piece (5) at the center.

6. The electric heating cooking appliance according to claim 3, characterized in that: An upper annular boss (21) is provided around the top surface of the heat-conducting cooking device (2), and a downwardly curved curling edge (23) is provided on the outer edge of the upper annular boss (21); a lower annular boss (31) is provided around the bottom surface of the pressing piece (3), and an upwardly curved curling edge (32) is provided on the outer edge of the lower annular boss (31), and the upper curved curling edge (32) and the lower curved curling edge (23) are abutted or welded.

7. The electric heating cooking appliance according to claim 3, characterized in that: The electrode (4) includes a silver attachment layer (41), a conductive connection layer (42) and a copper foil layer (43); the silver attachment layer (41) is conductively connected to the surface of the graphene electric heating film (1); the copper foil layer (43) is connected to the surface of the silver attachment layer (41) through the conductive connection layer (42); the thickness of the graphene electric heating film (1) is 10 μm-70 μm, and the thickness of the graphene electric heating film (1) after being stacked with the heat-conducting cooking device (2) and the pressing piece (3) is 2 mm-5 mm.

8. The electric heating cooking appliance according to claim 5, characterized in that: Two graphene electric heating films (1) are connected in parallel, wherein an electrode (4) of one of the graphene electric heating films (1) is provided with a lead-out terminal (44), a base assembly is provided at the bottom of the pressing piece (3), an outer end of the lead-out terminal (44) leads to the base assembly, and a control circuit is provided on the base assembly and electrically connected to the lead-out terminal (44).

9. The electric heating cooking appliance according to claim 8, characterized in that: The base assembly is provided with two, which include a plug (8) and a socket (9), the plug (8) is fixedly arranged at the bottom of the pressure piece (3), and the socket (9) is plugged into the bottom of the plug (8); one of the plugs (8) is provided with an upper electrical coupling head (81), and the corresponding socket (9) is provided with a lower electrical coupling head (92) and the control circuit, and the lead-out end (44) is electrically connected to the upper electrical coupling head (81).

10. The electric heating cooking appliance according to claim 1, characterized in that: The heat-conducting cooking device (2) and the pressing member (3) are both metal parts, and the two are welded and fixed; or, the heat-conducting cooking device (2) and the pressing member (3) are both metal parts, and the locking member (5) is a rivet, one end of the rivet is welded to the bottom of the heat-conducting cooking device (2), and the other end of the rivet passes through the pressing member (3) and is riveted.

Images