CN115419929A - Embedded cooking utensils - Google Patents

Abstract

The invention discloses an embedded stove which comprises a bottom shell, a face cover, a coil panel, a circuit board and a crystal plate, wherein the face cover and the bottom shell are combined to form a shell; the coil panel is arranged in the upper cavity part, the circuit board is arranged in the lower cavity part, and the first fan is arranged on the vent hole; the air duct box is embedded into the through hole on the surface cover, and the upper cavity of the air duct box protrudes out of the surface cover to form an electromagnetic cooking range; an air inlet and an air outlet are respectively arranged on the side wall plate of the air duct box above the face cover, the air duct is arranged in the upper cavity part, an upper pipe opening of the air duct is in butt joint with the air inlet, and a lower pipe opening of the air duct penetrates through the separation cavity plate to be communicated with the lower cavity part. Due to the adoption of the structure, the problem of dead circulation of the radiating air of the embedded cooker is solved, and the radiating effect of the cooker is effectively improved.

Description

Embedded cooking utensils

Technical Field

The invention relates to the technical field of embedded cookers, in particular to an embedded gas-electric dual-purpose cooker.

Background

The electromagnetic cooker comprises a surface cover, a bottom shell, a coil panel, a circuit board and a heat dissipation fan; when the induction cooker is electrified to work, electronic components on the circuit board such as IGBT devices and the coil panel can generate a large amount of heat, and the electronic components and the coil panel can be damaged by high temperature. In order to ensure the normal work of the electromagnetic cooker bear and avoid damage, heat needs to be discharged from the electromagnetic cooker in time.

At present, in the heat dissipation structure of the electromagnetic cooker in the prior art, an air inlet and an air outlet are respectively arranged on a bottom shell, a heat dissipation fan is arranged in an electromagnetic cooker body, and after air is blown by the heat dissipation fan to suck room-temperature air from the air inlet to air-cool electronic components and a coil panel in the electromagnetic cooker, heat in the electromagnetic cooker body is discharged from the air outlet to the outside. The embedded electromagnetic cooker is arranged in a slot on a top plate of a cooking bench or a cabinet, the electromagnetic cooker is embedded in the slot, the edge of a face cover of the electromagnetic cooker is attached to the top plate around the slot, and the electromagnetic cooker is arranged in an embedded mode, so that the cooking bench is easy to clean and tidy, attractive and neat. However, because the air inlet and the air outlet of the electromagnetic cooker heat dissipation system are respectively arranged on the bottom shell of the electromagnetic cooker, the bottom shell of the electromagnetic cooker is placed in a completely sealed cooking bench or cabinet, heat dissipation air is not discharged to the indoor, and can only be discharged into the sealed cooking bench or cabinet, and hot air after air cooling is sucked again by the electromagnetic cooker, so that dead circulation of the heat dissipation air of the electromagnetic cooker occurs, heat is not discharged to the outside, the heat dissipation effect of the electromagnetic cooker is poor, and electronic components in the electromagnetic cooker are heated too fast and are easily damaged. And the rated power of the electromagnetic cooker can not be designed to be high-power, and the electromagnetic cooker can not work for a long time.

Disclosure of Invention

The invention aims to provide an embedded stove to solve the problems in the background technology, the radiating air of the stove is sucked from an air inlet hole on an electromagnetic stove head above a face cover, and the air is exhausted from an air outlet hole on the electromagnetic stove head after an air cooling circuit board and a coil panel, so that the condition of dead circulation of the radiating air is avoided, the radiating effect of the stove is better, and the service life of the stove is effectively prolonged.

In order to achieve the purpose, the invention provides the following technical scheme:

an embedded kitchen range comprises a bottom shell, a face cover, a coil panel, a circuit board and a crystal plate, wherein the face cover covers an opening at the top of the bottom shell to form a shell, the shell is provided with an installation cavity, the kitchen range is embedded into a kitchen range or a cabinet body from a slotted hole on a table top, the edge of the face cover is tightly attached to the table top, and the face cover supports the kitchen range to be hung in the slotted hole on the table top.

The cooling device comprises an air duct box, a first fan and an air duct; a cavity separating plate is arranged in the air duct box, the air duct box is divided into an upper cavity part and a lower cavity part by the cavity separating plate according to an upper-layer structure and a lower-layer structure, and vent holes are formed in the cavity separating plate and are used for communicating a cavity of the upper cavity part with a cavity of the lower cavity part; the coil panel is arranged in the upper cavity part, the crystal plate covers the opening at the top part of the air duct box to seal the coil panel in the upper cavity part, the circuit board is arranged in the lower cavity part, and the first fan is arranged on the vent hole;

the air duct box is embedded into the through hole in the face cover, the upper cavity of the air duct box is convexly arranged on the face cover to form an electromagnetic cooking range, and the lower cavity of the air duct box is arranged in the mounting cavity of the shell.

Be located the preceding, the rear wall board of the last chamber portion of face lid top and be equipped with inlet port and venthole respectively, the air duct sets up in the last chamber portion, the last mouth of pipe and the inlet port butt joint of air duct are sealed, and the lower mouth of pipe of air duct passes separate the chamber board with lower chamber portion intercommunication.

Furthermore, the heat dissipation device further comprises a second fan, the second fan is arranged in the lower cavity part and is located at the lower pipe opening of the air guide pipe, an air suction port of the second fan is opposite to the lower pipe opening of the air guide pipe, and an air exhaust port of the second fan is opposite to the circuit board.

When this cooking utensils used, first fan and the synchronous working of second fan or arbitrary fan work blast air are followed room temperature air inlet port inhale, get into through the air duct cavity portion down, the forced air cooling become hotter air behind the electronic components on the circuit board, process hotter air under first fan negative pressure in the cavity portion is gone into to the air vent, the forced air cooling become high fever air behind the coil panel and follow again the venthole discharges away.

Specifically, first fan is axial fan, the second fan is centrifugal fan, utilizes centrifugal fan to have high wind pressure and changes the characteristics of air current direction, avoids influencing the air inflow smoothly because of crooked air duct, and centrifugal fan's air exit faces the circuit board blows out, strengthens forced air cooling effect effectively.

Furthermore, two vent holes are arranged beside the left side and the right side of the air duct respectively; the first fan has two, install on the air vent. Two axial fans are arranged at the same time, so that the flow speed and the flow quantity of the heat dissipation air are enhanced.

The upper cavity part of the air duct box is cylindrical, and the lower cavity part of the air duct box is tetragonal. The horizontal sectional area of the lower cavity part is larger than the radial sectional area of the upper cavity part, and the upper cavity part is vertically arranged on the center of the top of the lower cavity part.

Furthermore, in order to adapt to a flat-bottomed pan, the top surface of the cooker needs to be designed into a flat platform shape, the crystal plate is in a flat circular shape, the coil disc is in a circular shape, the circular coil disc is arranged in the cylindrical upper cavity part, and the flat circular crystal plate covers the opening of the top surface of the upper cavity part.

Furthermore, in order to adapt to a spherical cooker, the top surface of the cooking bench of the cooker needs to be designed into an invaginated spherical shape, the crystal plate is in a spherical shape, the coil panel is in a spherical shape, the spherical coil panel is arranged in the cylindrical upper cavity part, and the spherical crystal plate covers the opening of the top surface of the upper cavity part.

Furthermore, the air duct box comprises an upper box body and a lower box body, the upper box body comprises a cylindrical coil cavity part and a box cover part, the coil cavity part is vertically arranged on a top plate of the box cover part, and the two vent holes are respectively arranged on the top plate of the box cover part in the bottom of the coil cavity part; the inlet port sets up the upper shed department at coil chamber portion, the air duct sets up on the inner wall of coil chamber portion with the roof intercommunication of box cover portion, go up the box body lid and close the lower chamber portion that the sealed formation wind channel box in box body upper shed down, first, second fan and circuit board set up respectively in the box body down.

The bottom plate of the lower box body is provided with air duct clapboards, the two air duct clapboards are symmetrically arranged in the lower box body, and the lower box body is respectively divided into a second fan installation cavity, a circuit board cavity, a reflux cavity and a first fan installation cavity according to the sequence of the air flow direction; the second fan is arranged in the second fan mounting cavity, the circuit board is arranged in the circuit board cavity, and the first fan is arranged in the first fan mounting cavity.

Furthermore, the upper box body is made of plastic materials in an integrated molding mode.

The lower box body and the air duct partition plate are integrally formed by plastic materials.

As a still further scheme of the invention: in order to reduce the damage to electronic components caused by liquid flowing into the air duct box body from the air inlet holes or/and the air outlet holes, the air duct box body further comprises an outer cover ring, the outer cover ring wraps an upper cavity part located on the face cover, and the air inlet holes and the air outlet holes are arranged on the outer cover ring in a grid shape.

As a still further scheme of the invention: in order to avoid that liquid such as water or soup overflowing from the cooker flows to the air inlet hole or the air outlet hole along the flow during cooking, the cooker also comprises a cooker head cover, wherein a cooker head hole is formed in the top of the cooker head cover, and a plurality of supporting legs are arranged at the bottom of the cooker head cover; the stove head cover is detachably arranged on the face cover, the supporting legs are connected with the top face of the face cover, the electromagnetic stove head is embedded into the stove head hole to achieve liquid seal, the top of the stove head cover is flush with the top face of the electromagnetic stove head, and the stove head cover covers the air inlet hole or the air outlet hole.

As a still further scheme of the invention: the gas stove further comprises a gas stove head, wherein the gas stove head is arranged on the face cover and located on one side of the electromagnetic stove head, so that the gas stove is provided with a double-stove-head structure, and the gas-electricity dual-purpose multifunctional is realized.

Compared with the prior art, the invention has the beneficial effects that: when this cooking utensils used, first fan and the synchronous working of second fan or arbitrary fan work blast air are followed room temperature air inlet port inhale, get into through the air duct in the cavity of the lower part, the forced air cooling become hotter air behind the electronic components on the circuit board, process hotter air under first fan negative pressure the air vent gets into the interior forced air cooling of cavity of the upper part become the highly heated air behind the coil panel, follow again the outlet vent discharges away to indoor. The stove sucks room temperature air from an air inlet hole higher than the panel, firstly enters the lower cavity part of the air duct box under the drainage action of the air duct, then enters the upper cavity part of the air duct box after the air cooling circuit board passes through, and the air cooling coil panel is discharged into a room from an air outlet hole higher than the panel. Because the air inlet and the air outlet of the heat dissipation device are respectively arranged above the panel, and the air inlet and the air outlet are arranged in opposite directions or in a staggered manner, the air inlet can suck room-temperature air, and high-temperature air generated after air cooling is discharged into a room from the air outlet, so that the problem of dead circulation of heat dissipation air of the embedded stove is solved, and the heat dissipation effect of the stove is effectively improved.

Drawings

Fig. 1 is a front view of a first embodiment of the present invention.

Fig. 2 is a partially exploded view of a first embodiment of the present invention.

Fig. 3 is an exploded perspective view of a first embodiment of the present invention.

Fig. 4 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A of fig. 1.

Fig. 5 is a partial cross-sectional view of a first embodiment of the present invention.

Fig. 6 is a perspective view of an air duct box according to a first embodiment of the invention.

Fig. 7 is an exploded perspective view of the air duct box according to the first embodiment of the invention.

Fig. 8 is a perspective view of an air duct box according to a first embodiment of the invention.

Fig. 9 is a second perspective view of the upper case according to the first embodiment of the present invention.

Fig. 10 is a perspective view of a lower case according to a first embodiment of the present invention.

Fig. 11 is a perspective view of a burner cover according to a first embodiment of the present invention.

Fig. 12 is a perspective view of a second embodiment of the present invention.

Fig. 13 is an exploded perspective view of a second embodiment of the present invention.

The figures are labeled as: 11. a bottom case; 12. a face cover; 13. a coil panel; 14. a circuit board; 15. a crystal plate; 16. a heat sink; 21. a mounting cavity; 161. an air duct box; 162. a first fan; 163. a gas guide pipe 164 and a second fan; 41. a cavity separating plate; 51. an upper chamber section; 52. a lower chamber section; 411. a vent hole; 53. an air inlet; 54. an air outlet; 511. the top is open; 171. an upper box body; 172. a lower box body; 1711. a coil chamber section; 1712. a lid portion; 42. an air duct partition plate; 521. a second fan mounting cavity; 522. a circuit board cavity; 523. a reflux cavity; 524. a first fan mounting cavity; 181. an outer shroud ring; 182. a furnace head cover; 1821. a furnace head hole; 1822. supporting legs; 19. a gas furnace end.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate agent, and may be used for communicating the inside of two elements or interacting relation of two elements, unless otherwise specifically defined, and the specific meaning of the terms in the present invention can be understood by those skilled in the art according to specific situations.

Example one

Referring to fig. 1 to 5, an embedded kitchen range includes a bottom case 11, a top cover 12, a coil panel 13, a circuit board 14 and a crystal plate 15, the top cover 12 covers the top opening of the bottom case 11 to form an outer shell, the outer shell has a mounting cavity 21, the kitchen range is embedded into a kitchen range or a cabinet body from a slot on a table top, the edge of the top cover 12 is tightly attached to the table top, and the top cover 12 supports the kitchen range to be hung in the slot on the table top.

The heat dissipation device 16 is further included, and the heat dissipation device 16 includes an air duct box 161, a first fan 162, an air duct 163 and a second fan 164; a cavity separating plate 41 is arranged in the air duct box 161, and the cavity separating plate 41 divides the air duct box 161 into an upper cavity part 51 and a lower cavity part 52 according to an upper-layer structure and a lower-layer structure; the cavity partition plate 41 is provided with a vent hole 411, and the vent hole 411 penetrates the cavity of the upper cavity part 51 and the cavity of the lower cavity part 52; the coil panel 13 is arranged in the cavity of the upper cavity part 51, the crystal plate 15 covers the top opening 511 of the air duct box 161 to completely seal the coil panel 13 in the upper cavity part 51, the circuit board 14 is arranged in the lower cavity part 52, and the first fan 162 is arranged in the lower cavity part 52 and is positioned on the vent hole 411;

the air duct box 161 is partially embedded in the through hole on the face cover 12, the upper cavity 51 of the air duct box 161 is protruded on the face cover 12 to form an electromagnetic cooking range, and the lower cavity 52 of the air duct box is arranged in the installation cavity 21 of the shell.

An air inlet 53 and an air outlet 54 are respectively arranged on the front side wall plate and the rear side wall plate of the upper cavity part 51, the air duct 163 is arranged in the upper cavity part 51, the upper pipe opening of the air duct 164 is in butt joint sealing with the air inlet 53, and the lower pipe opening of the air duct 163 penetrates through the cavity separating plate 41 to be communicated with the lower cavity part 52.

The second fan 164 is disposed in the lower chamber portion 52 and located at a lower nozzle of the air duct 164, an air suction port of the second fan 164 is opposite to the lower nozzle of the air duct 164, and an air exhaust port of the second fan 164 is opposite to the circuit board 164.

When the cooker is used, the first fan 162 and the second fan 164 work synchronously or any fan works to blow air, room-temperature air is sucked from the air inlet 53 and enters the lower cavity part 52 through the air guide pipe 163, the air is cooled by the electronic components on the circuit board 14 to become hotter air, the hotter air enters the upper cavity part 51 through the vent holes 411 under the negative pressure action of the first fan 162 to become higher-temperature air after being cooled by the air of the coil disc 13, and then the higher-temperature air is discharged indoors through the air outlet 54. The stove sucks room temperature air from an air inlet 53 higher than the panel, firstly enters the lower cavity part 52 of the air duct box under the drainage action of the air duct 163, enters the upper cavity part 51 of the air duct box after the air-cooled circuit board 14 passes through, and the air-cooled coil panel 13 is discharged into a room from an air outlet 54 higher than the panel. Because the air inlet 53 and the air outlet 54 of the heat dissipation device are respectively arranged above the panel, and the air inlet and the air outlet are arranged in opposite directions or in a staggered way, the problem of dead circulation of the heat dissipation air-cooled air of the embedded cooker is solved, the cooker is ensured to suck air which is room temperature air with lower temperature, and the heat dissipation effect of the cooker is effectively improved.

Specifically, first fan 162 is axial fan, second fan 164 is centrifugal fan, utilizes centrifugal fan to have high wind pressure and changes the characteristics of air current direction, avoids influencing the smooth and easy of air inflow because of crooked air duct, and centrifugal fan's air exit faces the circuit board 14 blows out, strengthens air-cooled effect effectively.

Further, as shown in fig. 6 and 7, two of the vent holes 411 are respectively disposed beside the left and right sides of the air duct 163; the number of the first fans 162 is two, and the first fans are installed in the vent holes 411. Two axial fans are arranged to enhance the flow speed and the flow quantity of the heat dissipation air, and the heat dissipation effect of the stove is effectively improved.

The upper cavity 51 of the air channel box 161 is cylindrical, and the lower cavity 52 of the air channel box is tetragonal. The horizontal sectional area of the lower chamber part 52 is larger than the radial sectional area of the upper chamber part 51, and the upper chamber part 51 is vertically arranged on the top center of the lower chamber part 52.

Furthermore, in order to adapt to a flat-bottom pot, the top surface of the cooker needs to be designed into a flat platform shape, the crystal plate 15 is in a flat circular shape, the coil panel 13 is in a circular shape, the circular coil panel 13 is arranged in the cylindrical upper cavity part 51, and the flat circular crystal plate 15 covers and is combined on the opening of the top surface of the upper cavity part 51.

Furthermore, in order to adapt to spherical cookware, the top surface of the cooking bench of the cooking stove needs to be designed into an invaginated spherical shape, the crystal plate 15 is spherical, the coil panel 13 is spherical, the spherical coil panel 13 is arranged in the cylindrical upper cavity part 51, and the spherical crystal plate 15 covers the opening on the top surface of the upper cavity part 51.

As shown in fig. 8, 9 and 10, the air duct case 161 includes an upper case 171 and a lower case 172, the upper case 171 includes a cylindrical coil chamber portion 1711 and a case cover portion 1712, the coil chamber portion 1711 is vertically disposed on a top plate of the case cover portion 1712, and the two vent holes 411 are respectively disposed on the top plate of the case cover portion 1712 in a bottom of the coil chamber portion 1711; the inlet port 53 sets up at the upper shed department of coil chamber portion 1711, the air duct 163 sets up on the inner wall of coil chamber portion 1711 and the roof intercommunication of lid portion 1712, it closes to go up the box body 171 lid the sealed lower cavity portion 52 that forms the wind channel box in box body 172 upper shed department down, first, second fan and circuit board 14 set up respectively at box body 172 down internally.

The bottom plate of the lower box body 172 is provided with air duct partition plates 42, the two air duct partition plates 42 are symmetrically arranged in the lower box body 172, and the lower box body 172 is respectively divided into a second fan installation cavity 521, a circuit board cavity 522, a return flow cavity 523 and a first fan installation cavity 524 according to the sequence of the air flow direction; the second fan 164 is disposed in the second fan mounting cavity 521, the circuit board 14 is disposed in the circuit board cavity 522, and the first fan 162 is disposed in the first fan mounting cavity 524.

Further, the upper case 171 is integrally formed by a plastic material.

The lower box 172 and the air duct partition 42 are integrally formed by plastic materials.

Further, as shown in fig. 2 and fig. 3, in order to reduce the liquid from flowing into the air duct box through the air inlet holes 53 or the air outlet holes 54 and damaging the electronic components, the air duct box further includes an outer cover ring 181, the outer cover ring 181 is sleeved on the upper chamber portion and wraps the coil chamber portion 1711, and the air inlet holes 53 and the air outlet holes 54 are arranged on the outer cover ring 181 in a grid shape.

Further, as shown in fig. 2 and fig. 11, in order to prevent liquid such as water or soup overflowing from the pot from flowing to the air inlet hole 53 or the air outlet hole 54 along the flow direction during cooking, the cooking stove further comprises a stove head cover 182, a stove head hole 1821 is arranged at the top of the stove head cover 182, and a plurality of supporting legs 1822 are arranged at the bottom of the stove head cover 182; the stove head cover 182 is detachably arranged on the face cover 12, the supporting legs 1822 are connected with the top face of the face cover 12, the electromagnetic stove head is embedded into the stove head hole 1821 to achieve liquid seal, the top of the stove head cover 182 is flush with the top face of the electromagnetic stove head, and the stove head cover 182 covers the air inlet holes 53 or the air outlet holes 54.

Example two

As shown in fig. 11 and 12, the embedded cooker further comprises a gas burner 19, wherein the gas burner 19 is arranged on the surface cover 12 and positioned on one side of the electromagnetic cooker, so that the cooker has a double-burner structure, and the gas-electricity dual-purpose multifunctional is realized. The height of the gas stove head 19 is equal to that of the electromagnetic stove head, so that the whole body is more attractive.

The working principle of the invention is as follows: when the cooker is used, the first fan 162 and the second fan 164 work synchronously or any fan works to blow air, room-temperature air is sucked from the air inlet hole 53 and enters the lower cavity part 52 through the air guide pipe 163, the air cools the circuit board 14 to become hotter air, the hotter air enters the upper cavity part 51 through the vent hole 411 under the negative pressure action of the first fan 162 to cool the coil panel 13 to become higher-temperature air, and then the higher-temperature air is discharged indoors from the air outlet hole 54. The stove sucks room temperature air from an air inlet 53 higher than the panel, firstly enters a lower cavity part 52 of the air duct box under the drainage action of the air duct 163, enters an upper cavity part 51 of the air duct box after the air-cooled circuit board 14 passes through, and the air-cooled coil panel 13 is discharged into a room from an air outlet 54 higher than the panel. Because the air inlet hole 53 and the air outlet hole 54 of the heat dissipation device of the stove are respectively arranged above the panel, and the air inlet hole and the air outlet hole are arranged in opposite directions or in a staggered way, the problem of air cooling heat dissipation air dead circulation of the embedded stove is solved, the stove is ensured to suck air which is room temperature air with lower temperature, and the heat dissipation effect of the stove is effectively improved.

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

Claims (13)

1. The utility model provides an embedded cooking utensils, it includes face lid, coil panel, circuit board and brilliant board, the face lid covers on the slotted hole of mesa, characterized by: the cooling device comprises an air duct box, a first fan and an air duct; a cavity separating plate is arranged in the air duct box, the cavity separating plate divides the air duct box into an upper cavity part and a lower cavity part according to an upper-layer structure and a lower-layer structure, vent holes are formed in the cavity separating plate, and the vent holes are used for communicating a cavity of the upper cavity part with a cavity of the lower cavity part; the coil panel is arranged in the upper cavity part, the crystal plate covers the opening at the top part of the air duct box to seal the coil panel in the upper cavity part, the circuit board is arranged in the lower cavity part, and the first fan is arranged on the vent hole;

the air duct box is embedded into the through hole in the face cover, the upper cavity of the air duct box is convexly arranged on the face cover to form an electromagnetic cooking range, and the lower cavity of the air duct box is positioned below the face cover;

be located the wind channel box curb plate of face lid top and be equipped with inlet port and venthole respectively, the air duct sets up in the upper chamber portion, the last mouth of pipe and the inlet port butt joint of air duct are sealed, and the lower mouth of pipe of air duct passes the partition chamber board with lower chamber portion intercommunication.

2. A cooktop of claim 1, further comprising: the heat dissipation device also comprises a second fan, the second fan is arranged in the lower cavity part and is positioned at the lower pipe opening of the air guide pipe, and an air suction port of the second fan is opposite to the lower pipe opening of the air guide pipe;

the first fan and the second fan work synchronously or any fan works to blow air, room-temperature air is sucked from the air inlet hole and enters the lower cavity part through the air guide pipe, the air cools the circuit board to become hotter air, the hotter air enters the upper cavity part through the air vent under the action of negative pressure of the first fan, and the air cools the coil panel to become hotter air which is then discharged into the room from the air outlet hole.

3. A cooktop of claim 2, wherein: the first fan is an axial flow fan, the second fan is a centrifugal fan, and an air outlet of the centrifugal fan is opposite to the circuit board.

4. A cooktop of claim 3, wherein: the two vent holes are respectively arranged beside the left side and the right side of the air duct; the first fan is provided with two fans which are respectively arranged on the vent holes.

5. A cooktop according to claim 4, characterized in that: the upper cavity part of the air duct box is cylindrical, and the lower cavity part of the air duct box is square. The horizontal sectional area of the lower cavity part is larger than the radial sectional area of the upper cavity part, and the upper cavity part is vertically arranged on the center of the top of the lower cavity part.

6. A built-in hob according to any one of the claims 1 to 5, characterized in that: the crystal plate is in a flat circular shape, the coil panel is in a circular shape, the circular coil panel is arranged in the cylindrical upper cavity part, and the flat circular crystal plate covers the opening in the top surface of the upper cavity part.

7. A built-in hob according to any one of the claims 1 to 5, characterized in that: the crystal plate is spherical, the coil panel is spherical, the spherical coil panel is arranged in the cylindrical upper cavity part, and the spherical crystal plate covers the opening on the top surface of the upper cavity part.

8. A built-in hob according to any one of the claims 1 to 5, characterized in that: the air duct box comprises an upper box body and a lower box body, the upper box body comprises a cylindrical coil cavity part and a box cover part, the coil cavity part is vertically arranged on a top plate of the box cover part, and the two vent holes are respectively arranged on the top plate of the box cover part in the bottom of the coil cavity part; the inlet port sets up the upper shed department at coil chamber portion, the air duct sets up on the inner wall of coil chamber portion with the roof intercommunication of box cover portion, go up the box body lid and close the lower chamber portion that the sealed formation wind channel box in box body upper shed down, first, second fan and circuit board set up respectively in the box body down.

9. A built-in hob according to claim 8, characterized in that: the bottom plate of the lower box body is provided with air duct partition plates, the two air duct partition plates are symmetrically arranged in the lower box body, and the lower box body is respectively divided into a second fan installation cavity, a circuit board cavity, a reflux cavity and a first fan installation cavity according to the sequence of the air flow direction; the second fan sets up in second fan installation intracavity, the circuit board sets up in the circuit board intracavity, first fan sets up in first fan installation intracavity.

10. A cooktop of claim 9, wherein: the upper box body is integrally formed by plastic materials; the lower box body and the air duct partition plate are integrally formed by plastic materials.

11. A built-in hob according to claim 10, characterized in that: the air inlet and the air outlet are arranged on the outer cover ring in a grid shape.

12. A cooktop according to claim 11, characterized in that: the stove also comprises a stove head cover, wherein a stove head hole is formed in the top of the stove head cover, and a plurality of supporting legs are arranged at the bottom of the stove head cover; the stove head cover is detachably arranged on the face cover, the supporting legs are connected with the top face of the face cover, the electromagnetic stove head is embedded into the stove head hole to achieve liquid sealing, and the stove head cover covers the air inlet hole or the air outlet hole.

13. A cooktop according to claim 10, characterized in that: the cooker also comprises a gas furnace end, wherein the gas furnace end is arranged on the face cover and is positioned on one side of the electromagnetic cooker head.

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