Induction cooker with magnetic starting switch

Abstract

An induction cooker with a magnetic starting switch comprises a cooker body, a main live wire, a control circuit, an intermediate relay with a normally open contact, a movable magnet, a magnetic switch and an annular positioning line. The control circuit used for controlling the main live wire is arranged in the furnace body, the on-off of the control circuit is controlled by the movable magnet, and when the movable magnet is taken away, the control circuit is powered off, so that the main live wire in the furnace body is disconnected; therefore, pets or children are prevented from touching the control panel by mistake, and potential safety hazards are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of stoves, in particular to an induction cooker with a magnetic start switch. Background Art

[0002] An induction cooker is also called an electromagnetic stove. The first household induction cooker was born in Germany in 1957. In 1972, the United States began to produce induction cookers. In the early 1980s, induction cookers became popular in Europe, America and Japan. The principle of an induction cooker is electromagnetic induction, that is, an alternating magnetic field with a constantly changing direction is generated by passing an alternating current through a coil. Eddy currents will appear inside a conductor in the alternating magnetic field (the reason can be referred to the Faraday's law of electromagnetic induction). This is caused by the eddy electric field pushing the carriers in the conductor (the ones in the pot are electrons rather than iron atoms). The Joule heat effect of the eddy current heats up the conductor, thus realizing heating. For the sake of beauty, the existing induction cookers generally adopt the form of a control panel, concentrating the function switches on the control panel and realizing function selection and activation through a touch screen. During the use of the induction cooker, for the sake of convenience, the plug is usually not pulled out, which easily causes children or pets at home to accidentally touch the control panel and thus turn on the induction cooker, posing a safety hazard. Content of the Utility Model

[0003] The purpose of the utility model is to provide an induction cooker with a magnetic start switch, which solves the problem of poor cooling effect of the above device.

[0004] To achieve the above purpose, the utility model provides an induction cooker with a magnetic start switch, including a control circuit for controlling the on-off of the main circuit live wire inside the stove body. The control circuit is connected to the control coil of a middle relay, and the middle relay has normally open contacts. A magnetic switch controlled by a moving magnet is arranged on the control circuit. The normally open contacts are located on the main circuit live wire, and the moving magnet is placed in a circular positioning line at the top of the stove body.

[0005] Further, the magnetic switch includes a reed switch connected in series in the control circuit. When the moving magnet is placed in the circular positioning line, the reed switch closes.

[0006] Further, the magnetic switch includes a control chamber disposed inside the furnace body, a support rod fixedly connected to the control chamber, a moving block slidably connected to the support rod, a moving joint fixedly connected to the moving block, and a static joint fixedly connected to the control chamber; the control circuit is turned on through the abutment of the static joint and the moving joint; the moving block includes a moving plate and a sleeve fixedly connected to the moving plate and slidably connected to the support rod. A spring is sleeved on the support rod between the moving plate and the inner wall of the control chamber. A moving rod is provided on the moving plate, and a permanent magnet that can be attracted by the moving magnet is fixedly connected to the end of the moving rod.

[0007] Further, the support rod is a square shaft.

[0008] Further, a bent plate is provided on the moving plate, and the moving joint is installed on the bent plate.

[0009] Further, a baffle is provided at the end of the support rod. When the static joint and the moving joint are in abutment, there is a gap between the baffle and the sleeve.

[0010] Further, a support cylinder is provided inside the control chamber. The permanent magnet is in clearance fit with the support cylinder, and the depth of the support cylinder is greater than the maximum gap between the baffle and the sleeve.

[0011] Further, the static joint is fixedly connected to the inner wall of the control chamber through a connecting plate.

[0012] Further, a rubber protection layer is provided on the outer wall of the moving magnet.

[0013] Advantages of the present utility model: A control circuit for the main circuit live wire for control is provided inside the furnace body of the present utility model, and the on / off of the control circuit is controlled by a moving magnet. When the moving magnet is removed, the control circuit is powered off, thereby disconnecting the main circuit live wire inside the furnace body; further preventing pets or children from accidentally touching the control panel and reducing potential safety hazards. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art.

[0015] Figure 1 is the overall structural schematic diagram of the present utility model;

[0016] Figure 2 is the structural schematic diagram of the control circuit of the present utility model;

[0017] Figure 3 is the sectional view schematic diagram of the control chamber in an embodiment.

[0018] In the figure: 1. Furnace body; 2. Function switch; 3. Annular positioning line; 4. Baffle; 5. Main circuit live wire; 6. Moving block; 7. Moving magnet; 8. Static joint; 9. Connecting plate; 10. Moving joint; 11. Control chamber; 12. Support rod; 13. Sleeve; 14. Moving plate; 15. Permanent magnet; 16. Support cylinder; 17. Moving rod; 18. Spring; 19. Bent plate; 20. Normally open contact; 21. Control coil; 22. Intermediate relay; 23. Control circuit; 24. Magnetic switch. Detailed implementation manners

[0019] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0020] In one embodiment, as Figure 1-2 shown, an induction cooker with a magnetic start switch includes a control circuit 23 for controlling the on / off of the main circuit live wire 5 inside the furnace body 1. The control circuit 23 is connected to the control coil 21 of the intermediate relay 22, and the intermediate relay 22 has a normally open contact 20. A magnetic switch 24 controlled by a moving magnet 7 is provided on the control circuit 23. The normally open contact 20 is located on the main circuit live wire 5. The moving magnet 7 is placed in the annular positioning line 3 at the top of the furnace body 1 to facilitate the accurate placement of the moving magnet 7. In the initial state, the moving magnet 7 is not placed in the annular positioning line 3. At this time, the magnetic switch 24 is disconnected, the control circuit 23 is disconnected, the control coil 21 is not powered, and the main circuit live wire 5 is disconnected. When the moving magnet 7 is placed on the annular positioning line 3, the magnetic switch 24 is closed under the action of the moving magnet 7. At this time, the control circuit 23 is connected, the control coil 21 of the intermediate relay 22 is powered, and the normally open contact 20 will close, so that the main circuit live wire 5 is closed. At this time, the furnace body 1 can work normally. Therefore, when the induction cooker is used up, only by removing the moving magnet 7 and powering off the control circuit 23, the main circuit live wire 5 inside the furnace body 1 can be disconnected, thus preventing pets or children from accidentally touching the control panel and reducing the safety hazard. In addition, the magnetic switch 24 includes a reed switch connected in series to the control circuit 23. When the moving magnet 7 is placed in the annular positioning line 3, the reed switch is closed, the control circuit 23 is connected, the control coil 21 of the intermediate relay 22 is powered, and the normally open contact 20 will close, so that the main circuit live wire 5 is closed, thus ensuring the normal operation of the furnace body 1.

[0021] In other embodiments, as Figure 1 and Figure 3As shown, the magnetic switch 24 includes a control chamber 11 arranged inside the furnace body 1, a support rod 12 fixed to the control chamber 11, a moving block 6 slidably connected to the support rod 12, a moving joint 10 fixed to the moving block 6 and a static joint 8 fixed to the control chamber 11; the control circuit 23 inside the furnace body 1 is connected through the abutment between the static joint 8 and the moving joint 10; the moving block 6 includes a moving plate 14 and a sleeve 13 fixed to the moving plate 14 and slidably connected to the support rod 12, a spring 18 is sleeved on the support rod 12 between the moving plate 14 and the inner wall of the control chamber 11, a moving rod 17 is provided on the moving plate 14, and a permanent magnet 15 that can be attracted by the moving magnet 7 is fixed to the end of the moving rod 17, wherein the sliding connection method adopts In the form of clearance fit; when the furnace body 1 is working, the permanent magnet 15 is pressed against the inner wall of the control chamber 11 under the action of the moving magnet 7, at this time the spring 18 is compressed, the moving joint 10 and the static joint 8 are in contact, the control circuit 23 inside the furnace body 1 is connected, and the control coil 21 of the intermediate relay 22 is energized, and the normally open contact 20 is closed, so the main live wire 5 is connected at this time, and the induction cooker can be used normally at this time; after use, the operator only needs to remove the moving magnet 7, at this time the spring 18 is reset, the moving joint 10 and the static joint 8 are separated, so that the control circuit 23 inside the furnace body 1 is disconnected, the normally open contact 20 is reset, and the main live wire 5 is disconnected; thereby preventing pets or children from accidentally touching the control panel, reducing safety hazards; in addition, when When there are many oil drops on the control panel, which affects the pressing of the function switch 2, the utility model only needs to remove the moving magnet 7, and the main live wire 5 will be powered off. At this time, the control panel can be cleaned without unplugging the plug, thereby effectively preventing the situation where a rag wipes the control panel and accidentally touches several function switches 2, causing multiple circuits to be frequently disconnected and connected; thereby increasing the service life of the induction cooker and making the cleaning of the control panel simpler; in this embodiment, the support rod 12 is a square shaft, thereby ensuring that the moving joint 10 and the static joint 8 can be accurately contacted when the moving plate 14 moves; and the material of the moving plate 14 and the sleeve 13 is a ceramic material to prevent the control circuit 23 from being affected; the end of the support rod 12 is provided There is a baffle 4, and when the static joint 8 and the moving joint 10 are in contact, there is a gap between the baffle 4 and the sleeve 13; therefore, when the moving magnet 7 is taken away, the moving plate 14 will move toward the baffle 4 under the action of the spring 18, so that the static joint 8 and the moving joint 10 are separated, and then the power of the furnace body 1 is cut off, so that the safe use of the induction cooker can be effectively guaranteed; and a support cylinder 16 is provided inside the control chamber 11, and the permanent magnet 15 and the support cylinder 16 are gap-matched, and the depth of the support cylinder 16 is greater than the maximum gap between the baffle 4 and the sleeve 13, so as to ensure the stability of the movement of the permanent magnet 15; the static joint 8 is fixed to the inner wall of the control chamber 11 through the connecting plate 9, wherein the connecting plate 9 is made of ceramic material to prevent the control circuit 23 from being affected;A rubber protective layer is provided on the outer wall of the moving magnet 7, which protects the moving magnet 7 and facilitates the cleaning of the moving magnet 7; a bending plate 19 is provided on the moving plate 14, and the moving joint 10 is installed on the bending plate 19, effectively reducing the space of the control chamber 11.;

[0022] Working principle: After using the furnace body 1, only need to take out the moving magnet 7 from the annular positioning line 3; at this time, the magnetic switch 24 is disconnected, the control circuit 23 is disconnected, the control coil 21 loses power, and the normally open contact 20 resets; thus realizing the power-off of the main circuit live wire 5 in the furnace body 1, further preventing pets or children from accidentally touching the control panel and reducing the safety hazard.

[0023] The above-disclosed are only one or more preferred embodiments of the present application, and the scope of rights of the present application cannot be limited thereby. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.

Claims

1. An induction cooker with a magnetic start switch, characterized in that: The invention comprises a control circuit (23) for controlling the on and off of a main live wire (5) inside a furnace body (1), the control circuit (23) being connected to a control coil (21) of an intermediate relay (22), the intermediate relay (22) having a normally open contact (20), the control circuit (23) being provided with a magnetic switch (24) controlled by a moving magnet (7), the normally open contact (20) being located on the main live wire (5), and the moving magnet (7) being placed in an annular positioning line (3) on the top of the furnace body (1).

2. The induction cooker with a magnetic start switch according to claim 1, characterized in that: The magnetic switch (24) comprises a reed device connected in series in the control circuit (23), and when the moving magnet (7) is placed on the annular positioning line (3), the reed device is closed.

3. The induction cooker with a magnetic start switch according to claim 1, characterized in that: The magnetic switch comprises a control chamber (11) arranged inside a furnace body (1), a support rod (12) fixedly connected to the control chamber (11), a moving block (6) slidably connected to the support rod (12), a moving joint (10) fixedly connected to the moving block (6), and a static joint (8) fixedly connected to the control chamber (11); the control circuit (23) is connected through the abutment between the static joint (8) and the moving joint (10); the moving block (6) comprises a moving plate (14) and a sleeve (13) fixedly connected to the moving plate (14) and slidably connected to the support rod (12); a spring (18) is sleeved on the support rod (12) between the moving plate (14) and the inner wall of the control chamber (11); a moving rod (17) is provided on the moving plate (14); a permanent magnet (15) which can be attracted by the moving magnet (7) is fixedly connected to the end of the moving rod (17).

4. The induction cooker with a magnetic start switch according to claim 3, characterized in that: The support rod (12) is a square shaft.

5. The induction cooker with a magnetic start switch according to claim 3, characterized in that: A bending plate (19) is provided on the movable plate (14), and the movable joint (10) is installed on the bending plate (19).

6. The induction cooker with a magnetic start switch according to claim 3, characterized in that: A baffle (4) is provided at the end of the support rod (12); when the static joint (8) and the dynamic joint (10) are in abutment, a gap exists between the baffle (4) and the sleeve (13).

7. The induction cooker with a magnetic start switch according to claim 6, characterized in that: A support tube (16) is provided inside the control chamber (11), the permanent magnet (15) and the support tube (16) are clearance-matched, and the depth of the support tube (16) is greater than the maximum clearance between the baffle (4) and the sleeve (13).

8. The induction cooker with a magnetic start switch according to claim 3, characterized in that: The static joint (8) is fixedly connected to the inner wall of the control chamber (11) via a connecting plate (9).

9. The induction cooker with a magnetic start switch according to claim 3, characterized in that: A rubber protective layer is provided on the outer wall of the moving magnet (7).

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