CN216486084U - Cooking utensil - Google Patents

Abstract

The utility model provides a cooking utensil, include: a timer; and the microwave generating circuit is connected with the timer and comprises a magnetron and a frequency converter connected with the magnetron, and when the running time of the frequency converter is longer than or equal to the preset time, the frequency converter stops running and cuts off the power supply of the cooking appliance. In the technical scheme, as the frequency converter is provided with the longest working time, namely the preset time length in the application, the running time length of the frequency converter can be recorded in the running process of the frequency converter, and the frequency converter can work according to the set requirement of a user under the condition that the running time length is not less than the preset time length, namely, a magnetron is driven to send out a microwave signal; and when the operation time length is equal to or exceeds the preset time length, the frequency converter stops operating, and when the frequency converter stops operating, the power supply of the cooking appliance is cut off, and correspondingly, the magnetron also stops operating.

Description

Cooking utensil

Technical Field

The utility model relates to a cooking utensil technical field particularly, relates to a cooking utensil.

Background

The existing mechanical microwave oven consists of a timer, a transformer and a microwave generator, and when the timer is stuck, the microwave oven continuously works at the moment, thereby causing fire accidents.

SUMMERY OF THE UTILITY MODEL

The present invention aims at least solving one of the technical problems existing in the prior art or the related art.

To this end, a first aspect of the present invention provides a cooking appliance.

In view of this, according to the first aspect of the present invention, the present invention provides a cooking appliance, including: a timer; and the microwave generating circuit is connected with the timer and comprises a magnetron and a frequency converter connected with the magnetron, and when the running time of the frequency converter is longer than or equal to the preset time, the frequency converter stops running and cuts off the power supply of the cooking appliance.

The technical scheme of this application provides a cooking utensil, and this cooking utensil includes timer and the microwave generating circuit who is connected with the timer at least, and wherein, microwave generating circuit includes the converter and the magnetron of being connected with the converter. In the technical scheme, as the frequency converter is provided with the longest working time, namely the preset time length in the application, the running time length of the frequency converter can be recorded in the running process of the frequency converter, and the frequency converter can work according to the set requirement of a user under the condition that the running time length is not less than the preset time length, namely, a magnetron is driven to send out a microwave signal; and when the operation time length is equal to or exceeds the preset time length, the frequency converter stops operating, and when the frequency converter stops operating, the power supply of the cooking appliance is cut off, and correspondingly, the magnetron also stops operating.

In the technical scheme, the frequency converter can control the operation of the magnetron, so that even if the timer is blocked and the like, the frequency converter stops operating under the condition that the operating time length is equal to or exceeds the preset time length, the risk that the operating state of the magnetron is only controlled by the timer is reduced, and the use safety of the cooking appliance is improved.

In one of the possible designs, a timer, as the name implies, is used to set the operating time period. A user can set the conduction time length of the loop where the timer is located through the timer, and when the timing time length of the timer reaches the set timing time length, the timer acts to cut off the loop where the timer is located. Since the microwave generating circuit is connected to the timer, the microwave generating circuit is also powered off when the timer is operated to cut off the circuit in which the timer is located, and the magnetron stops outputting microwaves when the microwave generating circuit is powered off.

In one of the possible designs, cutting off the power supply of the cooking appliance may be understood as cutting off the power supply in the power supply circuit in which the timer and the microwave generating circuit are located.

In addition, the cooking utensil that this application proposed still has following additional technical characteristics.

In the above technical solution, the frequency converter includes: the first end of the switch tube is connected with the timer; the primary coil of the transformer is connected with the second end of the switching tube, and the first secondary coil of the transformer is connected with the magnetron; the input end of the voltage doubling circuit is connected with the second secondary coil of the transformer, and the output end of the voltage doubling circuit is connected with the magnetron; and the controller is connected with the control end of the switch tube.

In the technical scheme, a specific structure of the frequency converter is specifically defined, wherein the frequency converter at least comprises a controller, a switching tube connected with the controller, a transformer connected with the switching tube and a voltage doubling circuit connected with the transformer, wherein the voltage doubling circuit is used for increasing the voltage input to the magnetron, so that the magnetron can operate in a state of meeting the working requirement of the magnetron and generate microwaves.

In the design, the arranged voltage doubling circuit can realize the starting of the magnetron without a high voltage output by the second secondary coil, and simultaneously, the arranged voltage doubling circuit can reduce the specification requirement of the transformer so as to reduce the manufacturing cost of the cooking utensil.

In the technical scheme, the power supply of the magnetron can be realized based on the connection relation of the transformer, the voltage doubling circuit and the magnetron, so that the magnetron is excited to emit microwaves.

The control of the working state of the magnetron is realized by controlling the on-off of the switch tube by limiting the existence of the switch tube. In addition, due to the existence of the controller, the running time of the switch tube can be recorded, and the running time of the switch is used as the running time of the frequency converter for controlling, so that the power supply of the cooking appliance is cut off under the condition that the running time of the frequency converter is equal to or exceeds the preset time.

In one possible embodiment, the first secondary winding has a first connection and a second connection, it being understood that the first connection and the second connection are each two connection terminals of the first secondary winding, the first connection being connected to the first input of the magnetron and the second connection being connected to the second input of the magnetron.

In one of the possible designs, the transformer is a step-up transformer.

In one possible design, the voltage doubling circuit includes: a first diode; the anode of the second diode is connected with the cathode of the first diode and the first end of the second secondary coil; a first capacitor; the first end of the second capacitor is connected with the second end of the first capacitor and the second end of the second secondary coil; the first end of the resistor, the anode of the first diode and the first end of the first capacitor are connected and then connected with the input end of the magnetron, and the second end of the resistor, the cathode of the second diode and the second end of the second capacitor are connected and then grounded.

In this design, a specific topology of the voltage doubling circuit is specifically defined, wherein the voltage doubling circuit comprises at least a first diode and a second diode connected in series, a first capacitor and a second capacitor connected in series, and a resistor. The voltage doubling circuit composed of the above devices can form a higher voltage difference on the resistor after receiving the power supply signal from the second secondary coil, so as to improve the input voltage value of the magnetron by using the resistor.

In one possible design, further comprising: and the power selection device is connected with the frequency converter and is used for controlling the output power of the magnetron.

In the design, the power selection device is arranged, so that the control of the output power of the magnetic control is realized by using the power selection device, and compared with the prior art, the scheme of power adjustment is separated from the timer, the probability of jamming when the timer is used for adjusting the power is reduced, and the reliability of the cooking appliance in the use process is improved.

The power selection device is directly connected with the frequency converter by limiting, and the power selection device is used as a control branch circuit, so that the reliability of the cooking device in the using process is improved and the influence on the operation of the cooking equipment due to the fault of the power selection device is reduced compared with the design scheme that the power selection device is directly connected between the timer and the microwave generating circuit in series.

In one possible design, the frequency converter is further configured to: and when the loop where the frequency converter is positioned is abnormal, the switching tube is cut off.

In the design, the frequency converter is specifically limited to be capable of detecting the abnormality of the loop where the frequency converter is located, and when the detection result is abnormal, the cooking utensil is protected in a mode of controlling the switch tube to be cut off. In the process, the influence of the abnormal condition on the cooking appliance can be eliminated, so that the reliability of the operation of the cooking appliance is improved.

In one possible design, the frequency converter further comprises a temperature detection device, the temperature detection device is used for obtaining a temperature value of the switch tube, and when the temperature value is larger than a preset temperature, it is determined that an abnormality exists in a loop where the frequency converter is located.

In this design, it is defined that the frequency converter further has a temperature detection device, so that the temperature detection device is used to diagnose whether there is an abnormality in the loop in which the frequency converter is located, specifically, when there is an abnormality in the loop in which the frequency converter is located, such as a short circuit in the loop, the current on the loop will increase, that is, the current flowing through the switch tube will increase, and the switch tube serves as a switch device, and when the current flowing in increases, the heat generation will become serious, and the outward appearance is that the temperature of the switch tube will increase. Therefore, by arranging the temperature detection device, acquiring the temperature of the switch tube by using the temperature detection device, and further judging whether the loop has the abnormity such as short circuit or not by using the temperature, as described above, if the temperature value on the switch tube exceeds the preset temperature, the loop can be determined to have the abnormity such as short circuit, and at the moment, the switch tube can be controlled to be cut off so as to control the magnetron to stop running, so that the function of the cooking appliance is realized.

In one possible design, the temperature detection device is arranged on the switching tube in a fitting manner.

In one possible design, the temperature detection device is located in a region around the switching tube, wherein the surrounding region can be understood as that a gap exists between the temperature detection device and the switching tube, and the value of the gap is within 0.5 cm, so that whether an abnormality exists in a loop where the frequency converter is located can be sensed quickly.

In one possible design, the preset temperature is related to the type selection of the switch tube and also related to the distance between the temperature detection device and the switch tube, specifically, the value of the preset temperature is higher when the distance between the temperature detection device and the switch tube is smaller, and conversely, the value of the preset temperature is smaller when the distance between the temperature detection device and the switch tube is larger.

In one possible design, the method further comprises: and the fuse is connected with the timer and the microwave generating circuit in series.

In the design, a fuse is also limited to be arranged in the cooking appliance, and based on the arrangement position of the fuse, when the current is too large or short-circuited on a loop where the timer and the microwave generating circuit are located in the operation process of the magnetron, the fuse can be fused, so that the power supply of the timer and the microwave generating circuit is cut off, the influence of the current being too large or short-circuited on the cooking appliance on the loop where the timer and the microwave generating circuit are located is reduced, and the use safety of the cooking appliance is improved.

In one of the possible designs, the cooking appliance comprises: a cooking cavity, a magnetron for emitting microwave signals to the cooking cavity to cook food material located in the cooking cavity.

In this design, still have the culinary art chamber through injecing cooking utensil to utilize the culinary art chamber to come splendid attire edible material, and utilize the microwave signal to cook edible material, thereby realize the utilization of microwave signal.

In one of the possible designs, the timer and the microwave generating circuit are connected in series in the power supply circuit of the cooking appliance.

In the design, the timer and the microwave generating circuit are limited to be connected in series with a power supply loop of the cooking appliance, so that whether the microwave generating circuit operates or not is controlled by the timer.

In one possible design, the power selection apparatus includes: a knob-type power selection device or a push-button-type power selection device.

In this design, the possible forms of the power selection device are specifically defined, wherein a knob type power selection device can be understood as the power adjustment realized by rotating a knob, and a button type power selection device can be understood as the power adjustment realized by pressing a button.

In one possible design, the button power selection device has a plurality of buttons, each button corresponds to a power selection item, and when the button corresponding to the power selection item is pressed, the corresponding power is selected.

In one possible design, the cooking appliance includes a microwave oven or a micro-grill.

In one of the possible designs, the microwave oven comprises a mechanical microwave oven.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 shows one of the connection schematics of the cooking appliance of the present invention;

fig. 2 shows a second connection diagram of the cooking device according to the present invention.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 and fig. 2 is:

102 timer, 104 microwave generating circuit, 106 magnetron, 108 frequency converter, D1 switch tube, T transformer, 110 voltage doubling circuit, 112 controller, D2 first diode, D3 second diode, C1 first capacitor, C2 second capacitor, R resistor, 114 power selection device, 116 temperature detection device and 118 fuse.

Detailed Description

In order that the above aspects, features and advantages of the present invention can be more clearly understood, a further detailed description of the present invention will be given below with reference to the accompanying drawings and the detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

As shown in fig. 1, according to a first aspect of the present invention, the present invention provides a cooking appliance, comprising: a timer 102; the microwave generating circuit 104 is connected with the timer 102, the microwave generating circuit 104 comprises a magnetron 106 and a frequency converter 108 connected with the magnetron 106, and when the operation time length of the frequency converter 108 is greater than or equal to the preset time length, the frequency converter 108 stops operating to cut off the power supply of the cooking appliance.

The technical scheme of the application provides a cooking appliance, which at least comprises a timer 102 and a microwave generating circuit 104 connected with the timer 102, wherein the microwave generating circuit 104 comprises a frequency converter 108 and a magnetron 106 connected with the frequency converter 108. In the technical scheme, because the frequency converter 108 has the longest working time, that is, the preset time length in the present application, in the running process of the frequency converter 108, the running time length of the frequency converter 108 is recorded, and in the case that the running time length is not less than the preset time length, the frequency converter 108 works according to the setting requirement of the user, that is, the magnetron 106 is driven to emit a microwave signal; when the operation time period is equal to or exceeds the preset time period, the frequency converter 108 stops operating, and when the frequency converter 108 stops operating, the power supply of the cooking appliance is cut off, and correspondingly, the magnetron 106 also stops operating.

In the above technical solution, since the frequency converter 108 can control the operation of the magnetron 106, even if the timer 102 is stuck or the like, the frequency converter 108 stops operating when the operating time length is equal to or exceeds the preset time length, which reduces the risk that the operating state of the magnetron 106 is only controlled by the timer 102, and thus improves the safety of the cooking appliance.

In one of the possible designs, the timer 102, as the name implies, is used to set the duration of operation. A user can set the conduction time length of the loop where the timer 102 is located through the timer 102, and when the timing time length of the timer 102 reaches the set timing time length, the timer 102 acts to cut off the loop where the timer 102 is located. Since the microwave generation circuit 104 is connected to the timer 102, the microwave generation circuit 104 is also powered off when the timer 102 operates to interrupt the circuit in which the timer 102 is located, and the magnetron 106 stops outputting microwaves when the microwave generation circuit 104 is powered off.

In one of the possible designs, cutting off the power supply to the cooking appliance may be understood as cutting off the power supply in the power supply loop in which the timer 102 and the microwave generating circuit 104 are located.

In one possible design, the timer 102 is configured to receive a first time duration and set a countdown duration of the timer 102 according to the first time duration.

In this embodiment, the first duration may be input by the user, and the countdown duration of the timer 102 is set after the user sets the first duration, for example, when the timer 102 is a mechanical timer 102, the first duration may be understood as the number of turns of the rotation button of the mechanical timer 102 rotated by the user.

In one possible design, the timer 102 is specifically configured to: when the count-down length reaches zero, the timer 102 cuts off the power supply connection to the microwave generation circuit 104.

In this embodiment, the timer 102 controls whether the magnetron 106 in the microwave generating circuit 104 is operated or not by cutting off the power supply connection to the microwave generating circuit 104 when the count-down length counts down to zero.

In one possible design, the prompt is output when the count-down length counts down to zero.

In the design, the prompt information is output by limiting the time from the countdown length to zero, so that a user can know the running condition of the current cooking appliance, the cooked food can be taken out in time for eating after the cooking is finished, and the situation that the cooked food is forgotten is avoided.

In one possible design, the alert message includes a ring tone and/or a light message.

In the design, possible forms of the prompt information are specifically limited, and the running state of the cooking appliance is reminded to the user in a mode of ring and/or light information, so that the user can know the running condition of the current cooking appliance, the cooked food can be taken out in time for eating after the cooking is finished, and the situation that the cooked food is forgotten is avoided.

In one possible design, the timer 102 is provided with a chime that operates to sound when the count-down length counts down to zero.

In one possible design, the timer 102 is provided with a light emitting element that operates to emit light when the count down time reaches zero, and in one possible design, the light emitting element emits light continuously or intermittently.

In the above technical solution, as shown in fig. 2, the frequency converter 108 includes: a switch tube D1, wherein a first end of the switch tube D1 is connected with the timer 102; a primary coil of the transformer T is connected with the second end of the switching tube D1, and a first secondary coil of the transformer T is connected with the magnetron 106; the input end of the voltage doubling circuit 110 is connected with the second secondary coil of the transformer T, and the output end of the voltage doubling circuit 110 is connected with the magnetron 106; and the controller 112 is connected with the control end of the switching tube D1.

In this technical solution, a specific structure of the frequency converter 108 is specifically defined, wherein the frequency converter 108 at least includes a controller 112, a switch tube D1 connected to the controller 112, a transformer T connected to the switch tube D1, and a voltage doubling circuit 110 connected to the transformer T, wherein the voltage doubling circuit 110 is used for increasing the voltage input to the magnetron 106, so that the magnetron 106 can operate in a state of satisfying its operation requirement and generate microwaves.

In this design, the voltage doubling circuit 110 is provided to achieve the starting of the magnetron 106 without requiring a high voltage output from the second secondary coil, and the voltage doubling circuit 110 is provided to reduce the specification requirement of the transformer T, so as to reduce the manufacturing cost of the cooking appliance.

In this embodiment, the power supply of the magnetron 106 can be realized based on the connection relationship between the transformer T, the voltage doubling circuit 110 and the magnetron 106, so as to excite the magnetron 106 to emit microwaves.

The existence of the switch tube D1 is limited, so that the control of the working state of the magnetron 106 can be realized by controlling the on-off of the switch tube D1. In addition, due to the existence of the controller 112, the operation duration of the switching tube D1 can be recorded and controlled as the operation duration of the frequency converter 108, so as to cut off the power supply of the cooking appliance in the case that the operation duration of the frequency converter 108 is equal to or exceeds the preset duration.

In one possible design, the first secondary winding has a first connection and a second connection, which are two connection terminals of the first secondary winding, wherein the first connection is connected to the first input of the magnetron 106 and the second connection is connected to the second input of the magnetron 106.

In one of the possible designs, the transformer T is a step-up transformer T.

In one possible design, the voltage doubling circuit 110 includes: a first diode D2; a second diode D3, wherein the anode of the second diode D3 is connected with the cathode of the first diode D2 and the first end of the second secondary coil; a first capacitance C1; a second capacitor C2, wherein the first end of the second capacitor C2 is connected with the second end of the first capacitor C1 and the second end of the second secondary coil; and a first end of the resistor R, an anode of the first diode D2 and a first end of the first capacitor C1 are connected and then connected with the input end of the magnetron 106, and a second end of the resistor R, a cathode of the second diode D3 and a second end of the second capacitor C2 are connected and then grounded.

In this design, a specific topology of the voltage doubling circuit 110 is specifically defined, wherein the voltage doubling circuit 110 includes at least a first diode D2 and a second diode D3 connected in series, a first capacitor C1 and a second capacitor C2 connected in series, and a resistor R. The voltage doubling circuit 110, which is composed of the above-mentioned devices, can form a high voltage difference across the resistor R after receiving the power supply signal from the second secondary coil, so as to increase the input voltage value of the magnetron 106 by using the resistor R.

In one possible design, further comprising: and a power selection device 114 connected with the frequency converter 108 and used for controlling the output power of the magnetron 106.

In the design, the power selection device 114 is arranged, so that the power selection device 114 is used for controlling the output power of the magnetic control, compared with the prior art, the power adjustment scheme is separated from the timer 102, the probability of jamming when the timer 102 is used for adjusting the power is reduced, and the reliability of the cooking appliance in the use process is improved.

By limiting the direct connection of the power selection device 114 with the frequency converter 108 and using the power selection device 114 as a control branch, the reliability of the cooking appliance in the using process is improved and the influence on the operation of the cooking appliance due to the fault of the power selection device 114 is reduced compared with the design scheme of directly connecting the timer 102 and the microwave generating circuit 104 in series.

In one possible design, the power selection device 114 communicates with the frequency converter 108 via a low voltage signal.

In this design, the voltage signal detected by the frequency converter 108 is different when the power selection device 114 selects different powers, based on which a determination of the power selected by the power selection device 114 is made.

In one possible design, the power selection device 114 is coupled to the controller 112.

In one possible design, the frequency converter 108 is further configured to: when the loop in which the inverter 108 is located is abnormal, the switching tube D1 is turned off.

In this design, it is specifically limited that the inverter 108 can detect an abnormality in a circuit in which the inverter is located, and when the detection result is abnormal, the cooking utensil is protected by controlling the switching tube D1 to be turned off. In the process, the influence of the abnormal condition on the cooking appliance can be eliminated, so that the reliability of the operation of the cooking appliance is improved.

In one possible design, the frequency converter 108 further includes a temperature detection device 116, where the temperature detection device 116 is configured to obtain a temperature value of the switching tube D1, and determine that there is an abnormality in a loop where the frequency converter 108 is located when the temperature value is greater than a preset temperature.

In this design, it is defined that the frequency converter 108 further has a temperature detection device 116, so that the temperature detection device 116 is used to diagnose whether there is an abnormality in the loop of the frequency converter 108, specifically, in the case of an abnormality in the loop of the frequency converter 108, such as a short circuit in the loop, the current on the loop increases, that is, the current flowing through the switch tube D1 increases, and the switch tube D1 is used as a switch device, and in the case of an increase in the flowing current, the heat generation becomes serious, and the temperature of the switch tube D1 increases as an outward appearance. Based on this, by providing the temperature detector 116, acquiring the temperature of the switching tube D1 by the temperature detector 116, and determining whether there is an abnormality such as a short circuit in the circuit by using the temperature, as described above, if the temperature value of the switching tube D1 exceeds the preset temperature, it can be determined that there is an abnormality such as a short circuit in the circuit, and at this time, the switching tube D1 is controlled to be turned off, so that the magnetron 106 is controlled to stop operating, thereby functioning as a cooking utensil.

In one possible design, the temperature detection device 116 is disposed on the switch tube D1.

In one possible design, the temperature detection device 116 is located in a region around the switching tube D1, where the surrounding region is understood to be a gap between the temperature detection device 116 and the switching tube D1, where the gap is within 0.5 cm, so as to sense whether there is an abnormality in the circuit where the frequency converter 108 is located relatively quickly.

In one possible design, the preset temperature is related to the type of the switch tube D1 and also related to the distance between the temperature detecting device 116 and the switch tube D1, specifically, the value of the preset temperature is higher when the distance between the temperature detecting device 116 and the switch tube D1 is smaller, and conversely, the value of the preset temperature is smaller when the distance between the temperature detecting device 116 and the switch tube D1 is larger.

In one possible design, the method further comprises: a fuse 118, the fuse 118 being in series with the timer 102 and the microwave generating circuit 104.

In the design, the cooking appliance is further limited to be provided with the fuse 118, and based on the installation position of the fuse 118, if an excessive current or a short circuit occurs on a loop where the timer 102 and the microwave generating circuit 104 are located during the operation of the magnetron 106, the fuse 118 will be blown out, so that the power supply of the timer 102 and the microwave generating circuit 104 is cut off, the influence of the excessive current or the short circuit on the loop where the timer 102 and the microwave generating circuit 104 are located on the cooking appliance is reduced, and the use safety of the cooking appliance is improved.

In one of the possible designs, the cooking appliance comprises: a cooking cavity, a magnetron 106 for emitting a microwave signal to the cooking cavity for cooking a food material located in the cooking cavity with the microwave signal.

In this design, still have the cooking chamber through injecing cooking utensil to utilize the cooking chamber to come splendid attire to utilize the microwave signal to cook the edible material, thereby realize the utilization of microwave signal.

In one of the possible designs, the timer 102 and the microwave generating circuit 104 are connected in series in the power supply circuit of the cooking appliance.

In the design, the timer 102 and the microwave generating circuit 104 are limited to be connected in series with a power supply loop of the cooking appliance, so that whether the microwave generating circuit 104 operates or not is controlled by the timer 102.

In one possible design, the power selection device 114 includes: a knob-type power selection device or a push-button-type power selection device.

In this design, the possible forms of the power selection device 114 are specifically defined, wherein the knob type power selection device 114 can be understood as the power adjustment by rotating a knob, and the button type power selection device 114 can be understood as the power adjustment by pressing a button.

In one possible design, the power selection device 114 has a plurality of keys, each of which corresponds to a power selection item, and when the key corresponding to the power selection item is pressed, the corresponding power is selected.

In one possible design, the cooking appliance includes a microwave oven or a micro-grill.

In this design, in the case that the cooking appliance is a micro-steaming and baking integrated machine, the cooking appliance further has a steam generation device and a baking device, wherein the steam generation device is used for outputting steam into a cooking cavity in the cooking appliance so as to cook food materials in the cooking cavity by using the output steam, wherein the baking device can be a heating pipe or a hot air heating device, wherein the heating pipe is located at the top of the cooking cavity, and the hot air heating device is located at the back of the cooking cavity.

In one of the possible designs, the microwave oven may be a flat panel microwave oven.

In one possible design, the microwave oven includes a mechanical microwave oven, and in the case that the microwave oven is a mechanical microwave oven, the microwave oven further includes a motor and a rotating tray, wherein the motor is located on the rotating tray outdoors, and the motor is connected with the rotating tray for driving the rotating tray to rotate, so that in the case that the magnetron 106 outputs a microwave signal, the rotating tray can rotate simultaneously, thereby ensuring that the food material can be uniformly heated, and avoiding the occurrence of scorching at a local position of the food material.

In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, unless there is an explicit limitation otherwise, the terms "upper", "lower", and the like indicate the orientation or positional relationship based on the drawings, which are only for the convenience of description of the present invention and simplification of description, and do not imply or indicate that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In the present disclosure, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

1. A cooking appliance, comprising:

a timer;

the microwave generating circuit is connected with the timer and comprises a magnetron and a frequency converter connected with the magnetron, and when the running time of the frequency converter is longer than or equal to the preset time, the frequency converter stops running and cuts off the power supply of the cooking utensil.

2. The cooking appliance of claim 1, wherein the frequency converter comprises:

the first end of the switch tube is connected with the timer;

a primary coil of the transformer is connected with the second end of the switching tube, and a first secondary coil of the transformer is connected with the magnetron;

the input end of the voltage doubling circuit is connected with the second secondary coil of the transformer, and the output end of the voltage doubling circuit is connected with the magnetron;

and the controller is connected with the control end of the switch tube.

3. The cooking appliance of claim 2, wherein the voltage doubling circuit comprises:

a first diode;

the anode of the second diode is connected with the cathode of the first diode and the first end of the second secondary coil;

a first capacitor;

a first end of the second capacitor is connected with a second end of the first capacitor and a second end of the second secondary coil;

the first end of the resistor, the anode of the first diode and the first end of the first capacitor are connected and then connected with the input end of the magnetron, and the second end of the resistor, the cathode of the second diode and the second end of the second capacitor are connected and then grounded.

4. The cooking appliance according to any one of claims 1 to 3, further comprising:

and the power selection device is connected with the frequency converter and is used for controlling the output power of the magnetron.

5. The cooking appliance of claim 2 or 3, wherein the frequency converter is further configured to:

and under the condition that the loop where the frequency converter is positioned is abnormal, the switching tube is cut off.

6. The cooking appliance according to claim 5, wherein the frequency converter further comprises a temperature detection device for acquiring a temperature value of the switching tube,

and determining that the loop where the frequency converter is located is abnormal under the condition that the temperature value is greater than the preset temperature.

7. The cooking appliance according to any one of claims 1 to 3, further comprising:

a fuse connected in series with the timer and the microwave generating circuit.

8. The cooking appliance according to any one of claims 1 to 3, wherein the cooking appliance comprises:

a cooking cavity, the magnetron for emitting microwave signals to the cooking cavity to cook food material located in the cooking cavity.

9. The cooking appliance according to any one of claims 1 to 3, wherein the timer and the microwave generating circuit are connected in series in a power supply circuit of the cooking appliance.

10. The cooking appliance of claim 4, wherein the power selection device comprises: a knob-type power selection device or a push-button-type power selection device.

11. The cooking appliance of any one of claims 1 to 3, wherein the cooking appliance comprises a microwave oven or a micro-grill.

12. The cooking appliance of claim 11, wherein the microwave oven comprises a mechanical microwave oven.

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