CN110753412B - Control device of microwave oven and microwave oven - Google Patents
Control device of microwave oven and microwave oven Download PDFInfo
- Publication number
- CN110753412B CN110753412B CN201910965288.9A CN201910965288A CN110753412B CN 110753412 B CN110753412 B CN 110753412B CN 201910965288 A CN201910965288 A CN 201910965288A CN 110753412 B CN110753412 B CN 110753412B
- Authority
- CN
- China
- Prior art keywords
- timer
- voltage
- microwave oven
- power supply
- terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/66—Circuits
- H05B6/666—Safety circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C7/00—Stoves or ranges heated by electric energy
- F24C7/02—Stoves or ranges heated by electric energy using microwaves
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/642—Cooling of the microwave components and related air circulation systems
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/66—Circuits
- H05B6/68—Circuits for monitoring or control
- H05B6/681—Circuits comprising an inverter, a boost transformer and a magnetron
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of High-Frequency Heating Circuits (AREA)
Abstract
A control device of a microwave oven and the microwave oven comprise: a timer, a fan motor, an alternating current power supply and a magnetron temperature controller; the timer and the fan motor are connected in series between two ends of the alternating current power supply, and the magnetron temperature controller is connected between the timer and the alternating current power supply. The invention changes the parallel connection of the timer motor and the fan motor into the series connection through optimizing the circuit design. When the timer motor stops operating because of the trouble, the fan motor also can the stop operation, and the temperature of magnetron temperature controller can rise immediately, reaches the temperature controller and cuts off the temperature after, temperature controller cutting off power, microwave oven stop work to avoid the microwave oven unusual continuous operation and lead to food to have the overheated risk that the cigarette is smoked to fire, and high-voltage transformer high temperature arouses the cigarette to fire.
Description
Technical Field
The invention belongs to the technical field of mechanical microwave ovens, and particularly relates to a control device of a microwave oven and the microwave oven.
Background
At present, an electric circuit of a mechanical microwave oven generally comprises a timer, a temperature controller, a fan motor, a high voltage transformer, a high voltage capacitor, a magnetron and other elements. After the timer time is set, the circuit is automatically conducted, the microwave oven automatically works, and the microwave oven finishes working until the timer time returns to 0.
In the electric loop of the prior art, a timer motor and a fan motor are in a parallel relation, and the electric loop has the following defects:
1. when the timer quality is bad, the timer motor can not return to the time 0 point if the timer can not run, so that the microwave oven can run continuously, and when food exists in the oven cavity, the food is overheated to cause the risk of smoking and firing.
2. In the microwave oven use, when the reason such as vibration leads to the inside motor coil of timer to take place the broken string, the timer motor can the shut down and lead to the timer can't get back to time 0 point, and then leads to microwave oven continuous operation, and when having food in the furnace chamber, food has the overheating and leads to the risk of smoking and catching fire.
3. In the microwave oven use, when causing the inside motor connecting wire rosin joint of timer because of reasons such as long-term oxidation of welding point, the timer motor also can the shut down and lead to the timer can't get back to time 0 point, and then leads to microwave oven continuous operation, and when having food in the furnace chamber, food has the overheating and leads to the risk of smoking and getting on fire.
Disclosure of Invention
The purpose of the invention is realized by the following technical scheme.
According to the invention, the timer motor and the fan motor are connected in series, so that when the timer motor stops running due to faults such as disconnection, insufficient soldering and the like, the fan motor can also stop running, the temperature of the magnetron temperature controller is rapidly increased until the temperature controller automatically cuts off a power supply, and abnormal continuous work of the microwave oven is avoided.
In order to solve the above problem, a control apparatus for a microwave oven according to an embodiment of a first aspect of the present invention includes: a timer, a fan motor, an alternating current power supply and a magnetron temperature controller; the timer and the fan motor are connected in series between two ends of the alternating current power supply, and the magnetron temperature controller is connected between the timer and the alternating current power supply.
The invention relates to a control device of microwave oven, which changes the parallel connection of timer motor and fan motor into series connection through optimizing circuit design. When the timer motor stops operating because of the trouble, the fan motor also can the stop operation, and the temperature of magnetron temperature controller can rise immediately, reaches temperature controller cut-off action temperature after, temperature controller cutting off power, microwave oven stop work to avoid the microwave oven unusual continuous operation and lead to food to have the overheated risk that smokes and catch fire, and high-voltage transformer high temperature arouses the smoking and catch fire.
In some embodiments, the apparatus further comprises a turntable motor, and the timer, the fan motor, and the turntable motor are sequentially connected in series between two ends of the ac power source.
In some embodiments, the apparatus further comprises a controller, the timer, the controller, and the fan motor being connected in series between the terminals of the ac power source; the first end of the controller is connected with the timer, the second end of the controller is connected with the first end of the alternating current power supply, and the third end of the controller is connected with the second end of the alternating current power supply through the fan motor.
In some embodiments, the timer is a dual-shaft timer comprising four terminals consisting of a time switch, a power switch and a timer motor, wherein the timer motor consists of a contact consisting of a first terminal and a fourth terminal; the time switch is composed of a first terminal and a second terminal which form a contact; the power switch is a contact composed of a third terminal and a second terminal.
In some embodiments, the apparatus further comprises: the high-voltage power supply comprises a magnetron, a high-voltage transformer, a high-voltage capacitor, a magnetron, a high-voltage fuse and a high-voltage diode; the high-voltage side of the high-voltage transformer is connected with a high-voltage capacitor and a high-voltage diode, the high-voltage side of the high-voltage transformer, the high-voltage capacitor and the high-voltage diode form a half-wave voltage doubling circuit, the output end of the half-wave voltage doubling circuit is connected with a magnetron, the anode end of the high-voltage capacitor is connected with the anode end of the high-voltage diode and the magnetron, the cathode end of the high-voltage capacitor is connected with the high-voltage side of the high-voltage transformer through a high-voltage fuse, and the cathode of the high-voltage diode is grounded.
In some embodiments, the apparatus further comprises an oven lamp, one end of the oven lamp being connected to the second terminal of the timer, the other end of the oven lamp being connected to the second end of the ac power source and the second end of the low voltage side of the high voltage transformer.
In some embodiments, a first terminal of the timer is connected to a first end of the ac power source, a second terminal of the timer is connected to an end of the oven lamp and/or the turntable motor, a third terminal of the timer is connected to a first end of the low voltage side of the high voltage transformer, and a fourth terminal of the timer is connected to the fan motor or the controller.
In some embodiments, a primary switch, a filter plate and a monitoring switch are further connected between the first terminal of the timer and the first end of the alternating current power supply; and a secondary switch is also connected between the second end of the low-voltage side of the high-voltage transformer and the second end of the alternating current power supply.
In some embodiments, the fan motor or the turntable motor is connected to a second end of the ac power source and a second end of the low voltage side of the high voltage transformer.
In order to solve the above problem, a microwave oven according to an embodiment of the second aspect of the present invention includes the control device according to the embodiment of the first aspect.
The microwave oven changes the parallel connection of the timer motor and the fan motor into the series connection through optimizing the circuit design. When the timer motor stops operating because of the trouble, the fan motor also can the stop operation, and the temperature of magnetron temperature controller can rise immediately, reaches temperature controller cut-off action temperature after, temperature controller cutting off power, microwave oven stop work to avoid the microwave oven unusual continuous operation and lead to food to have the overheated risk that smokes and catch fire, and high-voltage transformer high temperature arouses the smoking and catch fire.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a front view illustrating a structure of a microwave oven according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram illustrating a control apparatus of a microwave oven according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a control apparatus of a microwave oven according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram illustrating a control apparatus of a microwave oven according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The invention controls the fan motor by using the timer motor, when the timer motor stops running due to faults, the fan motor can stop running, and the fan stops running, the temperature of the magnetron temperature controller quickly rises to the cutting-off temperature of the temperature controller and then the power supply of the whole machine is cut off, thereby avoiding the risk of smoking and firing due to overheating of food caused by abnormal continuous running of the microwave oven and the risk of smoking and firing caused by overhigh temperature of the high-voltage transformer.
As shown in fig. 1, the internal structure of the microwave oven of the present invention comprises the following components:
the timer 1: for setting the running time, a timer motor is provided inside. After the time of the timer 1 is set, the timer motor is powered on to operate and drives the timer 1 to slowly return to the time point 0, then the circuit is cut off, and the timer motor stops operating.
The high-voltage transformer 2: the high voltage transformer 2 can output high voltage after the microwave oven is powered on.
High-voltage capacitor 3: the voltage output by the high voltage transformer 2 is multiplied for the magnetron 4 to use.
The magnetron 4: microwave energy is generated and is guided into the cavity 8 of the microwave oven through a waveguide tube so as to realize the function of microwave cooking.
And (5) temperature controller: the temperature of the magnetron 4 is monitored and the power supply of the entire microwave oven is cut off when the temperature of the magnetron 4 exceeds a limit value.
And (6) a fan: for dissipating heat from the high voltage transformer 2, magnetron 4, etc.
A furnace door 7: the door of the microwave oven is opened to place food.
And (3) cavity 8: for forming a cooking space, and placing food in the cavity 8 for cooking.
The following three embodiments describe in detail the control device of the present invention located inside a microwave oven.
Example 1
As shown in fig. 2, the control device of a microwave oven of the present embodiment includes: the device comprises a timer 1, a high-voltage transformer 2, a high-voltage capacitor 3, a magnetron 4, a magnetron temperature controller 5, a fan motor 9, a timer motor 10, a turntable motor 11, a furnace lamp 12, a monitoring switch 13, a primary switch 14, a secondary switch 15, a filter plate 16, an AC power supply 17, a high-voltage fuse 18 and a high-voltage diode 19. The timer 1 is a two-axis timer.
The timer 1 comprises four terminals, and is composed of a first timer contact 1 (namely a time switch), a second timer contact 2 (namely a power switch) and a timer motor 10, wherein the timer motor 10 is composed of a first terminal 1 and a fourth terminal M which form contacts; a first timer contact 1 (i.e. a time switch) is composed of a first terminal 1 and a second terminal 2; and the second timer contact 2 (i.e. the power switch) is made up of a third terminal 3 and a second terminal 2; a first terminal 1 of the timer 1 is connected to a first end of an ac power supply 17, a second terminal of the timer 1 is connected to one ends of a turntable motor 11 and a furnace lamp 12, a third terminal 3 of the timer 1 is connected to a first end of a low voltage side of a high voltage transformer 2, and a fourth terminal M of the timer 1 is connected to a fan motor 9.
The timer 1, the furnace lamp 12 and the turntable motor 11 are connected to the low-voltage side of the high-voltage transformer 2, wherein one ends of the furnace lamp 12 and the turntable motor 11 are connected together in parallel and are connected with the second terminal 2 of the timer 1, the timer 1 is connected with one end of the fan motor 9 in series, and the other end of the fan motor 9 is connected with the second end of the power supply 17 and the second end of the low-voltage side of the high-voltage transformer 2. The other end of the furnace lamp 12 is connected in parallel with the other end of the turntable motor 11 and is connected to a second end of the power supply 17 and a second end of the low-voltage side of the high-voltage transformer 2.
In this embodiment, the high voltage side of the high voltage transformer 2 is connected to a high voltage capacitor 3 and a high voltage diode 19, the high voltage side of the high voltage transformer 2, the high voltage capacitor 3 and the high voltage diode 19 form a half-wave voltage doubling circuit for changing high voltage alternating current into high voltage direct current, an output end of the half-wave voltage doubling circuit is connected to the magnetron 4, an anode end of the high voltage capacitor 3 is connected to an anode end of the high voltage diode 19 and to the magnetron 4, a cathode end of the high voltage capacitor 3 is connected to the high voltage side of the high voltage transformer 2 through a high voltage fuse 18, and a cathode of the high voltage diode 19 is grounded. A primary switch 14, a secondary switch 15, and a monitor switch 13 are connected between the first end of the high voltage transformer 2 on the low voltage side and the first end of the ac power supply 17.
The working principle of the embodiment is as follows: when the microwave oven is in a working state (a microwave output state), two pairs of contacts of a first timer contact 1 (namely a time switch) and a second timer contact 2 (namely a power switch) of the timer 1 are closed, and the fan motor 9, the timer motor 10, the turntable motor 11 and the oven lamp 12 can work simultaneously.
When the microwave oven is in a non-operating state (no microwave output state), the first timer contact 1 (i.e., time switch) of the timer 1 is turned off, and the second timer contact 2 (i.e., power switch) is turned off, so that the fan motor 9, the timer motor 10, the turntable motor 11, and the oven lamp 12 do not operate in this state.
When the timer motor 10 stops operating due to a fault, the fan motor 9 is connected with the timer motor 10 in series, so that the fan motor 9 also stops operating due to disconnection, the fan 6 stops operating, and due to lack of cooling of the fan, the temperature of the magnetron temperature controller 5 is quickly increased to the cut-off temperature, then the temperature controller 5 is disconnected, the power supply of the whole microwave oven is cut off, and the microwave oven stops working. Thereby preventing the risk of the food being excessively heated to smoke and fire due to the abnormal continuous operation of the microwave oven and the risk of the high voltage transformer 2 being excessively heated to smoke and fire.
Example 2
As shown in fig. 3, the control device of a microwave oven of the present embodiment includes: the device comprises a timer 1, a high-voltage transformer 2, a high-voltage capacitor 3, a magnetron 4, a magnetron temperature controller 5, a fan motor 9, a timer motor 10, a turntable motor 11, a furnace lamp 12, a monitoring switch 13, a primary switch 14, a secondary switch 15, a filter plate 16, an AC power supply 17, a high-voltage fuse 18 and a high-voltage diode 19. The timer 1 is a two-axis timer.
The timer 1 comprises four terminals, and is composed of a first timer contact 1 (namely a time switch), a second timer contact 2 (namely a power switch) and a timer motor 10, wherein the timer motor 10 is composed of a first terminal 1 and a fourth terminal M which form contacts; a first timer contact 1 (i.e. a time switch) is composed of a first terminal 1 and a second terminal 2; and the second timer contact 2 (i.e. the power switch) is made up of a third terminal 3 and a second terminal 2; a first terminal 1 of the timer 1 is connected to a first end of an ac power supply 17, a second terminal of the timer 1 is connected to one end of the oven lamp 12, a third terminal 3 of the timer 1 is connected to a first end of a low voltage side of a high voltage transformer 2, and a fourth terminal M of the timer 1 is connected to a fan motor 9.
The timer 1, the furnace lamp 12 and the turntable motor 11 are connected to the low-voltage side of the high-voltage transformer 2, wherein the furnace lamp 12 is connected with the second terminal 2 of the timer 1, the timer 1 is connected with the fan motor 9 and the turntable motor 11 in series, and the other end of the turntable motor 11 is connected with the second end of the power supply 17 and the second end of the low-voltage side of the high-voltage transformer 2. The other end of the furnace lamp 12 is also connected to a second end of the power supply 17 and a second end of the low-voltage side of the high-voltage transformer 2.
In this embodiment, the high voltage side of the high voltage transformer 2 is connected to a high voltage capacitor 3 and a high voltage diode 19, the high voltage side of the high voltage transformer 2, the high voltage capacitor 3 and the high voltage diode 19 form a half-wave voltage doubling circuit for changing high voltage alternating current into high voltage direct current, an output end of the half-wave voltage doubling circuit is connected to the magnetron 4, an anode end of the high voltage capacitor 3 is connected to an anode end of the high voltage diode 19 and to the magnetron 4, a cathode end of the high voltage capacitor 3 is connected to the high voltage side of the high voltage transformer 2 through a high voltage fuse 18, and a cathode of the high voltage diode 19 is grounded. A primary switch 14, a secondary switch 15, and a monitor switch 13 are connected between the first end of the high voltage transformer 2 on the low voltage side and the first end of the ac power supply 17.
The working principle of the embodiment is as follows: when the microwave oven is in a working state (a microwave output state), two pairs of contacts of a first timer contact 1 (namely a time switch) and a second timer contact 2 (namely a power switch) of the timer 1 are closed, and the fan motor 9, the timer motor 10, the turntable motor 11 and the oven lamp 12 can work simultaneously.
When the microwave oven is in a non-operating state (no microwave output state), the first timer contact 1 (i.e., time switch) of the timer 1 is turned off, and the second timer contact 2 (i.e., power switch) is turned off, so that the fan motor 9, the timer motor 10, the turntable motor 11, and the oven lamp 12 do not operate in this state.
When the timer motor 10 stops operating due to a fault, the fan motor 9, the turntable motor 11 and the timer motor 10 are connected in series, so that the fan motor 9 and the turntable motor 11 also stop operating due to disconnection, and the fan 6 stops operating, and due to lack of cooling of the fan, the temperature of the magnetron temperature controller 5 is quickly raised to the cut-off temperature, then the temperature controller 5 is disconnected, the power supply of the whole microwave oven is cut off, and the microwave oven stops working. Thereby preventing the risk of the food being excessively heated to smoke and fire due to the abnormal continuous operation of the microwave oven and the risk of the high voltage transformer 2 being excessively heated to smoke and fire.
Example 3
As shown in fig. 4, the control device of a microwave oven of the present embodiment includes: the device comprises a timer 1, a high-voltage transformer 2, a high-voltage capacitor 3, a magnetron 4, a magnetron temperature controller 5, a fan motor 9, a timer motor 10, a turntable motor 11, a furnace lamp 12, a monitoring switch 13, a primary switch 14, a secondary switch 15, a filter plate 16, an AC power supply 17, a high-voltage fuse 18, a high-voltage diode 19 and a controller 20. The timer 1 is a two-axis timer. The controller 20 may be implemented by a single chip, an FPGA, or the like. The controller 20 has a first end connected to the M terminal of the timer 1, a second end connected to a first end of the ac power supply 17, and a third end connected to a second end of the ac power supply 17 through the fan motor 9.
The first terminal 1 of the timer 1 is connected with a first end of an alternating current power supply 17, the second terminal of the timer 1 is connected with one end of a turntable motor 11 and one end of a furnace lamp 12, the third terminal 3 of the timer 1 is connected with a first end of a low-voltage side of a high-voltage transformer 2, and the fourth terminal M of the timer 1 is connected with a controller 20. The timer 1 is composed of a first timer contact 1 (i.e. a time switch), a second timer contact 2 (i.e. a power switch) and a timer motor 10, wherein the timer motor 10 is composed of a first terminal 1 and a fourth terminal M which form contacts; a first timer contact 1 (i.e. a time switch) is composed of a first terminal 1 and a second terminal 2; and a second timer contact 2, i.e. a power switch, is formed by a third terminal 3 and a second terminal 2.
The timer 1, the furnace lamp 12 and the turntable motor 11 are connected to the low-voltage side of the high-voltage transformer 2, wherein one ends of the furnace lamp 12 and the turntable motor 11 are connected in parallel and are connected with a first end of the power supply 17 and a first end of the low-voltage side of the high-voltage transformer 2, the timer 1 is connected with the controller 20 and the fan motor 9 in series, and the fan motor 9 is connected with a second end of the power supply 17 and a second end of the low-voltage side of the high-voltage transformer 2.
The other end of the furnace lamp 12 is connected in parallel with the other end of the turntable motor 11 and is connected to a second end of the power supply 17 and a second end of the low-voltage side of the high-voltage transformer 2.
In this embodiment, the high voltage side of the high voltage transformer 2 is connected to a high voltage capacitor 3 and a high voltage diode 19, the high voltage side of the high voltage transformer 2, the high voltage capacitor 3 and the high voltage diode 19 form a half-wave voltage doubling circuit for changing high voltage alternating current into high voltage direct current, an output end of the half-wave voltage doubling circuit is connected to the magnetron 4, an anode end of the high voltage capacitor 3 is connected to an anode end of the high voltage diode 19 and to the magnetron 4, a cathode end of the high voltage capacitor 3 is connected to the high voltage side of the high voltage transformer 2 through a high voltage fuse 18, and a cathode of the high voltage diode 19 is grounded. A primary switch 14, a secondary switch 15 and a monitoring switch 13 are also connected between the low-voltage side of the high-voltage transformer 2 and the power supply.
The working principle of the embodiment is as follows: when the microwave oven is in a working state (a microwave output state), two pairs of contacts of a first timer contact 1 (namely a time switch) and a second timer contact 2 (namely a power switch) of the timer 1 are closed, and the fan motor 9, the timer motor 10, the turntable motor 11, the oven lamp 12 and the controller 20 can work simultaneously.
When the microwave oven is in a non-operating state (no microwave output state), the first timer contact 1 (i.e. time switch) of the timer 1 is turned off, and the second timer contact 2 (i.e. power switch) is turned off, so that the timer motor 10, the turntable motor 11, and the oven lamp 12 do not operate in this state. At this time, the controller 20 may control the operation or non-operation of the fan motor alone.
When the timer motor 10 stops operating due to a fault, the controller 20 controls the fan motor 9 to operate or stop, the controller 20 can select to control the fan motor 9 to also stop operating when the timer motor 10 stops operating, and the fan 6 stops operating, because of lack of cooling of the fan, the temperature of the magnetron temperature controller 5 is rapidly raised to the cut-off temperature, then the temperature controller 5 is cut off, the power supply of the whole microwave oven is cut off, and the microwave oven stops operating. Thereby preventing the risk of the food being excessively heated to smoke and fire due to the abnormal continuous operation of the microwave oven and the risk of the high voltage transformer 2 being excessively heated to smoke and fire.
The controller 20 may also choose to control the fan motor 9 to continue to operate when the timer motor 10 stops operating, so that the fan motor 9 can normally operate to continue to cool the microwave oven. Thereby, the risk that the food is excessively heated to smoke and fire due to abnormal continuous operation of the microwave oven and the risk that the high voltage transformer 2 is excessively heated to smoke and fire due to abnormal continuous operation of the microwave oven can be avoided.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (8)
1. A control apparatus of a microwave oven, comprising:
a timer, a fan motor, an alternating current power supply and a magnetron temperature controller; wherein the content of the first and second substances,
the timer and the fan motor are connected in series between two ends of an alternating current power supply, and the magnetron temperature controller is connected between the timer and the alternating current power supply;
the timer, the fan motor and the turntable motor are sequentially connected in series between two ends of the alternating current power supply;
the timer, the controller and the fan motor are sequentially connected in series between two ends of the alternating current power supply; the first end of the controller is connected with the timer, the second end of the controller is connected with the first end of the alternating current power supply, and the third end of the controller is connected with the second end of the alternating current power supply through the fan motor.
2. The control apparatus of a microwave oven as claimed in claim 1,
the timer is a double-shaft timer and consists of a time switch, a power switch and a timer motor; the timer includes four terminals, wherein the timer motor is composed of a first terminal and a fourth terminal to form a contact; the time switch is composed of a first terminal and a second terminal which form a contact; the power switch is a contact composed of a third terminal and a second terminal.
3. The control apparatus of a microwave oven as claimed in claim 2,
the apparatus further comprises: the high-voltage power supply comprises a magnetron, a high-voltage transformer, a high-voltage capacitor, a magnetron, a high-voltage fuse and a high-voltage diode; the high-voltage side of the high-voltage transformer is connected with a high-voltage capacitor and a high-voltage diode, the high-voltage side of the high-voltage transformer, the high-voltage capacitor and the high-voltage diode form a half-wave voltage doubling circuit, the output end of the half-wave voltage doubling circuit is connected with a magnetron, the anode end of the high-voltage capacitor is connected with the anode end of the high-voltage diode and the magnetron, the cathode end of the high-voltage capacitor is connected with the high-voltage side of the high-voltage transformer through a high-voltage fuse, and the cathode of the high-voltage diode is grounded.
4. The control apparatus of a microwave oven as claimed in claim 3,
the device further comprises a furnace lamp, one end of the furnace lamp is connected with the second terminal of the timer, and the other end of the furnace lamp is connected with the second end of the alternating current power supply and the second end of the low-voltage side of the high-voltage transformer.
5. The control apparatus of a microwave oven as claimed in claim 4,
the first terminal of the timer is connected with the first end of the alternating current power supply, the second terminal of the timer is connected with one end of the furnace lamp, the third terminal of the timer is connected with the first end of the low-voltage side of the high-voltage transformer, and the fourth terminal of the timer is connected with the controller.
6. The control apparatus of a microwave oven as claimed in claim 3,
a primary switch, a filter plate and a monitoring switch are connected between the first terminal of the timer and the first end of the alternating current power supply; and a secondary switch is also connected between the second end of the low-voltage side of the high-voltage transformer and the second end of the alternating current power supply.
7. The control apparatus of a microwave oven as claimed in claim 3,
and the turntable motor is connected with the second end of the alternating current power supply and the second end of the low-voltage side of the high-voltage transformer.
8. A microwave oven comprising the control device of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910965288.9A CN110753412B (en) | 2019-10-11 | 2019-10-11 | Control device of microwave oven and microwave oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910965288.9A CN110753412B (en) | 2019-10-11 | 2019-10-11 | Control device of microwave oven and microwave oven |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110753412A CN110753412A (en) | 2020-02-04 |
| CN110753412B true CN110753412B (en) | 2022-04-29 |
Family
ID=69278113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910965288.9A Active CN110753412B (en) | 2019-10-11 | 2019-10-11 | Control device of microwave oven and microwave oven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110753412B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1353272A (en) * | 2000-11-08 | 2002-06-12 | 三星电子株式会社 | Microwave oven possessing overheat protective function and control method of its fan motor |
| CN201225687Y (en) * | 2008-04-15 | 2009-04-22 | 美的集团有限公司 | Control device of mechanical microwave oven |
| GB2481064A (en) * | 2010-06-11 | 2011-12-14 | Valor Ltd | Fire simulation with a holographic image in front of an image of moving flames |
| KR101341402B1 (en) * | 2012-08-03 | 2013-12-18 | 문지원 | Heat blower having fire protection function |
| CN203571811U (en) * | 2013-09-30 | 2014-04-30 | 广东格兰仕微波炉电器制造有限公司 | Variable-frequency microwave furnace |
| CN206439864U (en) * | 2017-02-04 | 2017-08-25 | 上海凯航酒店设备有限公司 | A kind of mechanical barbecue type microwave oven system |
-
2019
- 2019-10-11 CN CN201910965288.9A patent/CN110753412B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1353272A (en) * | 2000-11-08 | 2002-06-12 | 三星电子株式会社 | Microwave oven possessing overheat protective function and control method of its fan motor |
| CN201225687Y (en) * | 2008-04-15 | 2009-04-22 | 美的集团有限公司 | Control device of mechanical microwave oven |
| GB2481064A (en) * | 2010-06-11 | 2011-12-14 | Valor Ltd | Fire simulation with a holographic image in front of an image of moving flames |
| KR101341402B1 (en) * | 2012-08-03 | 2013-12-18 | 문지원 | Heat blower having fire protection function |
| CN203571811U (en) * | 2013-09-30 | 2014-04-30 | 广东格兰仕微波炉电器制造有限公司 | Variable-frequency microwave furnace |
| CN206439864U (en) * | 2017-02-04 | 2017-08-25 | 上海凯航酒店设备有限公司 | A kind of mechanical barbecue type microwave oven system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110753412A (en) | 2020-02-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101663814B (en) | Power cutoff device automatically operated upon occurrence of spark on electric wire | |
| US4455509A (en) | Intrinsically safe lighting system | |
| CN110753412B (en) | Control device of microwave oven and microwave oven | |
| TW595269B (en) | The power source for the flash discharge lamp and the control method thereof | |
| KR102042847B1 (en) | Circuit that automatically cuts off the power when detecting the abnormality of lighting fixture | |
| JP2865657B1 (en) | Microwave oven power supply circuit | |
| CN212992230U (en) | Saw cut motor and prevent overload overheat burnout detection device | |
| CN101444146B (en) | Safety starter device | |
| KR20030092915A (en) | Microwave oven | |
| JPH06151054A (en) | High frequency electric power supply device for microwave oven | |
| KR100437408B1 (en) | A circuit for overheating prevention of gas oven range | |
| CN110531642A (en) | A kind of safe power-off system of tobacco cutting equipment | |
| CN217635957U (en) | Dehumidification electromechanical heating circuit | |
| US6875970B2 (en) | Safety apparatus for output level-adjustable microwave oven | |
| CN214381506U (en) | Protection circuit of current source ripple suppression circuit | |
| CN220775379U (en) | Hydrogen thyratron temperature protection device | |
| CN214153997U (en) | Anti-clamping circuit of toaster handle | |
| KR910002672Y1 (en) | Grill heater driving circuit of oven | |
| CN103872654A (en) | Multiple-protection constant-power electronic transformer | |
| JP2601881B2 (en) | Cooking device | |
| KR200244098Y1 (en) | High Voltage Protection Circuit of Microwave | |
| CN2489438Y (en) | Power transformer | |
| KR100395940B1 (en) | Interlocking Circuit for Cooling Fan and Solenoid Valve | |
| TWM635162U (en) | Protective devices for commercial refrigeration equipment heaters | |
| CN2081596U (en) | Electronic thermorelay |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |