CN212930116U - Electromagnetic cooking appliance capable of preventing reverse heating - Google Patents
Electromagnetic cooking appliance capable of preventing reverse heating Download PDFInfo
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- CN212930116U CN212930116U CN202021454057.6U CN202021454057U CN212930116U CN 212930116 U CN212930116 U CN 212930116U CN 202021454057 U CN202021454057 U CN 202021454057U CN 212930116 U CN212930116 U CN 212930116U
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Abstract
The utility model discloses a prevent electromagnetic cooking utensil of reverse heating belongs to electromagnetic cooking utensil technical field, has solved among the prior art electromagnetic cooking utensil and has placed the technical problem of the during operation reverse heating metal mesa on the metal mesa, the utility model discloses an electromagnetic cooking utensil, including controller and electromagnetic heating device, electromagnetic cooking utensil still includes switching element and respectively with first conductive part and the second conductive part of mesa butt, switching element includes controlled end and control end, the controlled end is established ties between the one end of first conductive part and power, the second conductive part is connected with the other end of power, the controller is connected with the control end in order to receive the detected signal, the controller is according to the heating state of detected signal control electromagnetic heating device in order to prevent the reverse heating.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to an electromagnetism cooking utensil technical field especially relates to an electromagnetism cooking utensil that prevents reverse heating.
[ background of the invention ]
The electromagnetic cooking utensil utilizes current to generate a magnetic field through a coil, when the magnetic line of force of the magnetic field passes through an iron pot, the magnetic induction line cuts to generate vortex and collides with the pot to generate heat so as to achieve the purpose of heating food in the pot, therefore, the electromagnetic cooking utensil has the advantages of rapid heating, no open fire, safety, convenience and the like, and is more and more popular and accepted by consumers.
When the existing electromagnetic cooking appliance is placed on an operation table top made of a metal material for working, the magnetic field generated surrounds the electromagnetic cooking appliance, so that the magnetic induction line can penetrate through the metal operation table top below the electromagnetic cooking appliance, the temperature of the metal operation table top is increased, the bottom of an outer shell of the electromagnetic cooking appliance can be scalded, the normal work of the electromagnetic cooking appliance is influenced, a user can be scalded, and the user is injured by the body.
[ Utility model ] content
The technical problem to be solved in the utility model is to overcome the deficiency of the prior art and provide an electromagnetic cooking utensil for preventing reverse heating.
In order to solve the technical problem, the utility model adopts the following technical scheme:
the utility model provides an electromagnetic cooking utensil of preventing reverse heating, includes controller and electromagnetic heating device, electromagnetic cooking utensil still includes switching element and the first electrically conductive part and the second electrically conductive part with mesa butt respectively, switching element includes controlled end and control end, controlled end is established ties between the one end of first electrically conductive part and power, the second electrically conductive part is connected with the other end of power, the controller is connected with the control end in order to receive detection signal, the controller is according to detection signal control electromagnetic heating device's heating state in order to prevent reverse heating.
Further, the switching element is a photocoupler, the photocoupler includes a light emitter and a light receiver, the light emitter forms the controlled terminal, and the light receiver forms the control terminal.
Furthermore, the light emitter is a light emitting diode, and the light receiver is a photosensitive semiconductor tube or a photosensitive resistor.
Further, the switch element is a relay, the relay comprises an electromagnetic coil and two reed contact pieces, the electromagnetic coil forms the controlled end, the two reed contact pieces form the control end, and after the first conductive part and the second conductive part are conducted through the metal table top, the two reed contact pieces are switched from a normally open state to an attraction state or switched from a normally closed state to a separation state.
Furthermore, the electromagnetic cooking appliance further comprises an isolation transformer, the isolation transformer is provided with an input winding group and an output winding group, two ends of the input winding group are connected with a power supply, one end of the output winding group is connected with the controlled end, and the other end of the output winding group is connected with the second conducting part.
Further, the power supply is mains supply; or the electromagnetic cooking appliance comprises a shell, wherein a power taking coil for coupling wireless power taking with the electromagnetic heating device is arranged in the shell, one end of the power taking coil is connected with the controlled end, and the other end of the power taking coil is connected with the second conducting part; or the power supply is a storage battery.
Furthermore, one end of the control end is connected with the ground through a resistor, the other end of the control end is connected with a 5V power supply, and one end of the controller is connected between the control end and the resistor.
Further, the electromagnetic cooking appliance comprises a housing, at least two support legs are arranged at the bottom of the housing, the first conductive part is arranged at the bottom of one support leg, and the second conductive part is arranged at the bottom of the other support leg.
Furthermore, the supporting foot is provided with an installation cavity, one end of the installation cavity is communicated with the inside of the shell, the other end of the installation cavity is communicated with the outside, and the first conductive part and the second conductive part are respectively arranged in the two installation cavities and are parallel and level with the bottom surface of the supporting foot.
Further, the first conductive part and the second conductive part are both metal conductive sheets.
The utility model has the advantages that:
when the electromagnetic cooking appliance is placed on the non-metal table top, the first conductive part and the second conductive part can not be conducted through the non-metal table top; when the electromagnetic heating device is placed on the metal table board, the first conducting part and the second conducting part are conducted through the metal table board, the controlled end controls the control end to be switched to a conducting state from a disconnecting state or switched to the disconnecting state from the conducting state, the control end is in the disconnecting state, the detection signal received by the controller is a low-level signal, the control end is in the conducting state, the detection signal received by the controller is a high-level signal, the controller can judge whether the first conducting part and the second conducting part are conducted currently according to the received detection signal, if the first conducting part and the second conducting part are judged to be conducted, the electromagnetic heating device is stopped to heat or the electromagnetic heating device is heated with low power, so that the metal table board is prevented from being heated reversely, and if the first conducting part and the second conducting part are judged to be not conducted, the electromagnetic heating device is controlled to heat food; additionally, because the utility model provides a switching element's controlled end is established ties between the one end of first conductive part and power, the second conductive part is connected with the other end of power, and the control end is connected with the controller in order to receive detected signal, therefore can know, controlled end and control end are connected respectively on input circuit and output circuit, so, can establish the voltage of power on the input circuit in human safe voltage range, take place the electric shock danger behind avoiding user touch metal mesa or two conductive parts, user's safety in utilization has been guaranteed from this, the normal use of electrical apparatus on the output circuit also can not be influenced to the while.
The switch element is a photoelectric coupler, the photoelectric coupler comprises a light emitter and a light receiver, the light emitter forms a controlled end, and the light receiver forms a control end. The first conductive part and the second conductive part are conducted through the metal table top, the light emitter emits light, the light receiver generates photocurrent after being illuminated and outputs the photocurrent after being amplified by the electronic circuit, and the conversion of electricity → light → electricity is realized, so that the electric isolation of the input circuit and the output circuit is realized, and in addition, the electric signal has the advantages of unidirectionality and the like during transmission, so the photoelectric coupler has good electromagnetic wave interference resistance and electric insulation capability.
The electromagnetic cooking appliance further comprises an isolation transformer, wherein the isolation transformer is provided with an input winding group and an output winding group, two ends of the input winding group are connected with the power supply, one end of the output winding group is connected with the controlled end, and the other end of the output winding group is connected with the second conducting part. By the design, when the power supply is the commercial power, the power is taken through the isolation transformer physical isolation power supply, and accidental electric shock of a user when touching the two conductive parts or the metal table top can be prevented.
One end of the control end is connected with the ground through a resistor, the other end of the control end is connected with a 5V power supply, and one end of the controller is connected between the control end and the resistor. By the design, short circuit of the system can be avoided.
The electromagnetic cooking utensil comprises a shell, wherein the bottom of the shell is provided with at least two support legs, the bottom of one support leg is provided with a first conductive part, and the bottom of the other support leg is provided with a second conductive part. The two conductive parts are installed by utilizing the existing support legs, so that the structural compactness of the electromagnetic cooking appliance can be improved, and the arrangement of other structures for fixing the two conductive parts is avoided, so that the structure of the electromagnetic cooking appliance is simplified.
The stabilizer blade is equipped with the installation cavity, and the one end and the inside intercommunication of casing of installation cavity, the other end and external intercommunication, first conductive part and second conductive part are arranged in two installation cavities respectively and with stabilizer blade bottom surface parallel and level. By the design, the conducting wire connected with the conducting part can extend into the shell through the mounting cavity and is connected with the controller in the shell, so that the damage and the influence on the appearance of a product caused by the exposed conducting wire are avoided.
The first conductive part and the second conductive part are both metal conductive sheets. By the design, the contact area between the conductive part and the table top can be increased, so that the detection reliability is improved.
These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.
[ description of the drawings ]
The invention will be further explained with reference to the drawings:
fig. 1 is a block diagram of a control circuit according to a preferred embodiment of the present invention.
Reference numerals:
100. a controller; 200. an isolation transformer; 300. a light emitter; 400. a light receptor; 500. a power source; 600. and (4) resistance.
[ detailed description ] embodiments
The utility model provides a prevent electromagnetic cooking utensil of reverse heating, including controller and electromagnetic heating device, electromagnetic cooking utensil still includes the switch element and respectively with first conductive part and the second conductive part of mesa butt, the switch element includes controlled end and control end, the controlled end is established ties between the one end of first conductive part and power, the second conductive part is connected with the other end of power, the controller is connected with the control end in order to receive the detected signal, the controller is according to the heating state of detected signal control electromagnetic heating device in order to prevent reverse heating.
When the electromagnetic cooking appliance is placed on the non-metal table top, the first conductive part and the second conductive part can not be conducted through the non-metal table top; when the electromagnetic heating device is placed on the metal table board, the first conducting part and the second conducting part are conducted through the metal table board, the controlled end controls the control end to be switched to a conducting state from a disconnecting state or switched to the disconnecting state from the conducting state, the control end is in the disconnecting state, the detection signal received by the controller is a low-level signal, the control end is in the conducting state, the detection signal received by the controller is a high-level signal, the controller can judge whether the first conducting part and the second conducting part are conducted currently according to the received detection signal, if the first conducting part and the second conducting part are judged to be conducted, the electromagnetic heating device is stopped to heat or the electromagnetic heating device is heated with low power, so that the metal table board is prevented from being heated reversely, and if the first conducting part and the second conducting part are judged to be not conducted, the electromagnetic heating device is controlled to heat food; additionally, because the utility model provides a switching element's controlled end is established ties between the one end of first conductive part and power, the second conductive part is connected with the other end of power, and the control end is connected with the controller in order to receive detected signal, therefore can know, controlled end and control end are connected respectively on input circuit and output circuit, so, can establish the voltage of power on the input circuit in human safe voltage range, take place the electric shock danger behind avoiding user touch metal mesa or two conductive parts, user's safety in utilization has been guaranteed from this, the normal use of electrical apparatus on the output circuit also can not be influenced to the while.
The technical solutions of the embodiments of the present invention are explained and explained below with reference to the drawings of the embodiments of the present invention, but the embodiments described below are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the embodiment, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.
Referring to fig. 1, the electromagnetic cooking appliance in this embodiment may be an electromagnetic oven, an electric cooker, or an electric pressure cooker, taking the electromagnetic oven as an example, the electromagnetic oven includes a housing, a controller 100 and an electromagnetic heating device electrically connected to the controller 100 are disposed in the housing, the electromagnetic heating device includes a wire coil support and an electromagnetic induction coil wound on the wire coil support, when the electromagnetic oven is in operation, the electromagnetic induction coil is energized and generates a magnetic field, when a magnetic line of force of the magnetic field passes through an iron pot placed on the electromagnetic oven, the magnetic induction coil cuts the magnetic line to generate eddy current and collides with the pot to generate heat so as to heat food in the pot.
In order to prevent the electromagnetic oven from being placed on the metal table top, and the electromagnetic heating device reversely heats the metal table top to scald or scald a user, the electromagnetic oven in this embodiment further includes a switch element, and a first conductive part a and a second conductive part B respectively abutted to the table top, the switch element includes a controlled end 300 and a control end 400, the controlled end 300 is connected in series between the first conductive part a and one end of the power supply 500, and the second conductive part B is connected to the other end of the power supply, so that the controlled end 300, the power supply, the first conductive part a and the second conductive part B are connected to form an input circuit, the controller 100 is connected to the control end 400 to form an output circuit, and the controller 100 receives a detection signal of the control end 400 and controls the heating state of the electromagnetic heating device according to the detection signal to prevent reverse heating.
Specifically, the switching element in this embodiment is preferably a photocoupler, which includes a light emitter and a light receiver, the light emitter forms the controlled terminal 300, the light emitter is a light emitting diode, the light receiver forms the control terminal 400, and the light receiver is a photosensitive semiconductor tube or a photosensitive resistor. After the first conductive part A and the second conductive part B are conducted through the metal table board, the light emitter emits light, the light receiver generates photocurrent after being illuminated and outputs the photocurrent after being amplified by the electronic circuit, and the conversion of electricity → light → electricity is realized, so that the electrical isolation of the input circuit and the output circuit is realized, and in addition, the electrical signal has the advantages of unidirectionality and the like during transmission, so the photoelectric coupler has good electromagnetic wave interference resistance and electrical insulation capability.
If the induction cooker in this embodiment is placed on the non-metal table top, the first conductive part a and the second conductive part B cannot be conducted through the non-metal table top, and at this time, the light emitter cannot emit light, and the control terminal 400 is in a disconnected state, and at this time, the detection signal received by the controller 100 is a low level signal and determines that the table top is the non-metal table top, and controls the electromagnetic heating device to heat so as to cook food. When the electromagnetic oven is placed on the metal table, the first conductive part a and the second conductive part B are conducted through the metal table, the controlled terminal 300 emits light, the control terminal 400 generates a photocurrent after being illuminated, and the control terminal is turned on, the detection signal received by the controller 100 is a high level signal, and the table is determined to be the metal table, and the controller 100 stops heating by the electromagnetic heating device or performs heating with low power, so as to prevent the metal table from being heated reversely, and in order to avoid the metal table from burning a user, in this embodiment, preferably, when the metal table is detected, the controller 100 stops heating by the electromagnetic heating device.
In addition, since the controlled terminal 300 and the control terminal 400 in this embodiment are connected to the input circuit and the output circuit respectively, the voltage of the power supply 500 in the input circuit can be set within the human body safety voltage range, so as to avoid the electric shock hazard after the user touches the metal table top or the first conductive part a and the second conductive part B, thereby ensuring the use safety of the user, and simultaneously not affecting the normal use of the electrical appliance in the output circuit.
The power supply 500 in this embodiment is preferably a commercial power, since the voltage of the commercial power is 220V, in order to avoid the occurrence of electric shock hazard, the induction cooker further includes an isolation transformer 200, the isolation transformer 200 has an input winding group and an output winding group, two ends of the input winding group are connected to the power supply 500, one end of the output winding group is connected to the controlled end 300, and the other end is connected to the second conductive part B. By such design, the power can be taken by the physical isolation power supply of the isolation transformer 200, so that accidental electric shock when a user touches the first conductive part A and the second conductive part B or the metal table top is prevented.
Finally, in the present embodiment, one end of the control terminal 400 is connected to the ground through the resistor 600, the other end is connected to the 5V power supply, and one end of the controller 100 is connected between the control terminal 400 and the resistor 600. By the design, short circuit of the system can be avoided.
In addition, in this embodiment, at least two support legs are disposed at the bottom of the housing, preferably four support legs are disposed, wherein a first conductive portion a is disposed at the bottom of one support leg, and a second conductive portion B is disposed at the bottom of the other support leg. The first conductive part A and the second conductive part B are installed by utilizing the existing support legs, so that the structural compactness of the induction cooker can be improved, and the arrangement of other structures for fixing the two conductive parts is avoided, so that the structure of the induction cooker is simplified.
Be equipped with the installation cavity in the stabilizer blade, the one end and the inside intercommunication of casing of installation cavity, the other end and external intercommunication, first conductive part A and second conductive part B arrange in two installation cavities respectively and with stabilizer blade bottom surface parallel and level. By the design, the wire connected with the first conductive part A can extend into the shell through the installation cavity and is connected with the controller in the shell, and the wire connected with the first conductive part B can extend into the shell through the installation cavity and is connected with the controller in the shell, so that the wire is prevented from being exposed to damage and affecting the appearance of a product.
Finally, in order to increase the contact area between the first conductive part a and the mesa, and the second conductive part B, so as to improve the detection reliability, in this embodiment, the first conductive part a and the second conductive part B are both metal conductive sheets.
It is understood that in other embodiments of the present invention, the power source may also be a detachably mounted battery, and since the voltage of the battery is low, two ends of the battery may be directly connected to the controlled end and the second conductive part B; or an electricity taking coil for coupling wireless electricity taking with the electromagnetic induction coil is arranged in the shell, one end of the electricity taking coil is connected with the controlled end, the other end of the electricity taking coil is connected with the second conductive part, and whether an isolation transformer is additionally arranged or not can be selected according to the voltage after electricity taking to avoid electric shock of a user.
It can be understood that, in other embodiments of the present invention, the switch element is a relay, the relay includes an electromagnetic coil and two reed contacts, the electromagnetic coil forms a controlled end, the two reed contacts form a control end, when the electromagnetic oven is placed on the non-metal table, the electromagnetic coil is not powered on, the two reed contacts are in a disconnected normally open state, and at this time, the detection signal received by the controller is a low level signal, and the electromagnetic heating device is controlled to heat to cook food; when the electromagnetic oven is placed on the metal table board, the first conducting part A and the second conducting part B are conducted through the metal table board, the electromagnetic coil is electrified and generates a magnetic field to attract and conduct the two reed contact pieces, the controller receives a high level signal at the moment and judges that the table board is the metal table board, and the controller stops the electromagnetic heating device to heat so as to prevent reverse heating.
It can be understood that, in other embodiments of the present invention, the switch element is a relay, the relay includes an electromagnetic coil and two reed contacts, the electromagnetic coil forms a controlled end, the two reed contacts form a control end, when the electromagnetic oven is placed on the non-metal table, the electromagnetic coil is not powered on, the two reed contacts are in a normally closed state of attraction, and at this time, the detection signal received by the controller is a high level signal, and the electromagnetic heating device is controlled to heat to cook food; when the electromagnetic oven is placed on the metal table board, the first conducting part A and the second conducting part B are conducted through the metal table board, the electromagnetic coil is electrified and generates a magnetic field to separate and disconnect the two reed contact pieces, the controller receives a low level signal at the moment and judges that the table board is the metal table board, and the controller stops the electromagnetic heating device to heat so as to prevent reverse heating.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.
Claims (10)
1. The utility model provides an electromagnetic cooking utensil of preventing reverse heating, includes controller and electromagnetic heating device, its characterized in that, electromagnetic cooking utensil still includes switching element and the first electrically conductive part and the second electrically conductive part with mesa butt respectively, switching element includes controlled end and control end, controlled end is established ties between the one end of first electrically conductive part and power, the second electrically conductive part is connected with the other end of power, the controller is connected with the control end in order to receive detection signal, the controller is according to detection signal control electromagnetic heating device's heating state in order to prevent reverse heating.
2. The induction cooking appliance of claim 1, wherein the switching element is a photo-coupler, the photo-coupler comprising a light emitter and a light receiver, the light emitter forming the controlled terminal and the light receiver forming the controlled terminal.
3. The induction cooking appliance for preventing reverse heating according to claim 2, wherein said light emitter is a light emitting diode and said light receiver is a photo transistor or a photo resistor.
4. The induction cooking appliance of claim 1, wherein said switching element is a relay, said relay comprising a solenoid and two reed contacts, said solenoid forming said controlled end, said two reed contacts forming said control end, said two reed contacts switching from normally open to engaged or normally closed to disengaged after said first and second conductive portions are connected through said metal table.
5. The induction cooking appliance for preventing reverse heating as claimed in one of claims 1 to 4, further comprising an isolation transformer having an input winding set and an output winding set, wherein both ends of said input winding set are connected to a power source, and one end of said output winding set is connected to said controlled terminal and the other end is connected to said second conductive part.
6. The induction cooking appliance for preventing back heating as claimed in one of claims 1 to 4, wherein said power source is commercial power; or the electromagnetic cooking appliance comprises a shell, wherein a power taking coil for coupling wireless power taking with the electromagnetic heating device is arranged in the shell, one end of the power taking coil is connected with the controlled end, and the other end of the power taking coil is connected with the second conducting part; or the power supply is a storage battery.
7. The induction cooking appliance for preventing reverse heating as claimed in one of claims 1 to 4, wherein one end of said control terminal is connected to the ground via a resistor, the other end is connected to a 5V power supply, and one end of said controller is connected between said control terminal and said resistor.
8. An induction cooking appliance as claimed in any one of claims 1 to 4, wherein said induction cooking appliance comprises a housing, the bottom of said housing being provided with at least two legs, the bottom of one of said legs being provided with said first electrically conductive portion and the bottom of the other leg being provided with said second electrically conductive portion.
9. The induction cooking appliance for preventing back heating of claim 8, wherein said support leg has a cavity, one end of said cavity is connected to the inside of said housing, the other end is connected to the outside, said first and second conductive parts are disposed in said two cavities and flush with the bottom surface of said support leg.
10. The induction cooking appliance for preventing reverse heating as claimed in one of claims 1 to 4, wherein said first conductive part and said second conductive part are both metal conductive sheets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021454057.6U CN212930116U (en) | 2020-07-22 | 2020-07-22 | Electromagnetic cooking appliance capable of preventing reverse heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021454057.6U CN212930116U (en) | 2020-07-22 | 2020-07-22 | Electromagnetic cooking appliance capable of preventing reverse heating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212930116U true CN212930116U (en) | 2021-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021454057.6U Active CN212930116U (en) | 2020-07-22 | 2020-07-22 | Electromagnetic cooking appliance capable of preventing reverse heating |
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| Country | Link |
|---|---|
| CN (1) | CN212930116U (en) |
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- 2020-07-22 CN CN202021454057.6U patent/CN212930116U/en active Active
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Effective date of registration: 20230829 Address after: No. 999, Mei Li Road, Huaiyin District, Ji'nan, Shandong Patentee after: Shandong Jiuchuang Home Appliance Co.,Ltd. Address before: No. 999, Mei Li Road, Huaiyin District, Ji'nan, Shandong Patentee before: JOYOUNG Co.,Ltd. |