CN116193661A - Control method of microwave cooking appliance, microwave cooking appliance and storage medium - Google Patents

Abstract

The invention discloses a control method of a microwave cooking appliance, the microwave cooking appliance and a computer readable storage medium. The microwave cooking appliance comprises a magnetron and a filament loop, wherein the magnetron comprises a filament, the filament loop comprises a first switch piece connected in series with the filament, the first switch piece is in a closed state, and the control method of the microwave cooking appliance comprises the following steps: under the condition that a microwave instruction is acquired, controlling a power supply module to supply power to a magnetron; and under the condition that the magnetron completes starting, the first switch piece is controlled to be opened or enter an on-off mode. According to the control method, under the condition that the magnetron completes starting, the first switch piece is controlled to be disconnected or enter the on-off mode, at the moment, the filament can continuously keep emitting electrons at high temperature by utilizing the characteristic of secondary back-rolling of filament electrons, and therefore sustainable normal work of the magnetron can be kept, and the filament loop is in a disconnected or on-off state, so that the filament electrifying time can be shortened, the service life of the magnetron can be prolonged, energy consumption can be reduced, and the working efficiency of the magnetron can be further improved.

Description

Control method of microwave cooking appliance, microwave cooking appliance and storage medium

Technical Field

The invention relates to the technical field of cooking appliances, in particular to a control method of a microwave cooking appliance, the microwave cooking appliance and a computer readable storage medium.

Background

The magnetron is used as a core component of the microwave oven and consists of a cathode and an anode. The existing magnetrons are directly powered by a high-voltage transformer or a frequency converter, the power supply requirement of the existing magnetrons is composed of two parts, one is about 4KV high voltage with a positive electrode grounded, and an electric field is generated in the magnetrons; the other part is a voltage of about 3.3V between the cathodes (filaments), and electrons can be continuously emitted after the electric heating. However, this results in a degradation of the quality of the filament and a shortened service life, and also has a high power consumption, which reduces the operating efficiency of the magnetron.

Disclosure of Invention

The embodiment of the invention provides a control method of a microwave cooking appliance, the microwave cooking appliance and a computer readable storage medium.

The embodiment of the invention provides a control method of a microwave cooking electric appliance, the microwave cooking electric appliance comprises a magnetron and a filament loop, the magnetron comprises a filament, the filament loop comprises a first switch piece connected in series with the filament, the first switch piece is in a closed state, and the control method comprises the following steps:

under the condition that a microwave instruction is acquired, a power supply module is controlled to supply power to the magnetron;

and under the condition that the magnetron completes starting, the first switch piece is controlled to be disconnected or enter an on-off mode.

According to the control method, under the condition that the magnetron completes starting, the first switch piece is controlled to be disconnected or enter the on-off mode, at the moment, the filament can continuously keep emitting electrons at high temperature by utilizing the characteristic of secondary back-rolling of filament electrons, and therefore sustainable normal work of the magnetron can be kept, and the filament loop is in a disconnected or on-off state, so that the filament electrifying time can be shortened, the service life of the magnetron can be prolonged, energy consumption can be reduced, and the working efficiency of the magnetron can be further improved.

In some embodiments, in the event that a microwave instruction is acquired, controlling the power supply module to power the magnetron includes:

and when the microwave instruction is acquired, controlling a second switch piece of a primary power supply circuit of a transformer of the power supply module to be closed so as to enable the power supply module to supply power to the magnetron.

In some embodiments, controlling the first switch to be turned off or to be turned on/off when the magnetron completes the starting of the magnetron comprises:

after the power supply module supplies power to the magnetron for a preset time period, the magnetron is determined to finish starting vibration.

In certain embodiments, the predetermined duration is selected from the range [5s,8s ].

In some embodiments, in the on-off mode, the first switch member has an off-time that is greater than an on-time of the first switch member.

In certain embodiments, the first and second switching elements comprise relays.

The microwave cooking appliance of the embodiment of the invention comprises:

a magnetron including a filament;

the filament loop is provided with a first switch piece, the first switch piece is connected with the filament in series, and the first switch piece is in a closed state;

a power module;

the controller is electrically connected with the power module and the first switch piece and is used for:

controlling the power supply module to supply power to the magnetron under the condition that a microwave instruction is acquired;

and under the condition that the magnetron completes starting, the first switch piece is controlled to be disconnected or enter an on-off mode.

In certain embodiments, the controller is configured to:

and when the microwave instruction is acquired, controlling a second switch piece of a primary power supply circuit of a transformer of the power supply module to be closed so as to enable the power supply module to supply power to the magnetron.

In certain embodiments, the controller is configured to:

after the power supply module supplies power to the magnetron for a preset time period, the magnetron is determined to finish starting vibration.

An embodiment of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the control method of the microwave cooking appliance of any of the above embodiments.

According to the microwave cooking electric appliance and the storage medium, under the condition that the magnetron completes oscillation starting, the first switch piece is controlled to be switched off or enter the on-off mode, at the moment, the filament can continuously keep high-temperature emission electrons by utilizing the characteristic of secondary back-rolling of filament electrons, and further sustainable normal work of the magnetron can be kept, and the filament loop is in the off or on-off state, so that the filament electrifying time can be shortened, the service life of the magnetron can be prolonged, the energy consumption can be reduced, and further the working efficiency of the magnetron can be improved.

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 foregoing 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, in which:

fig. 1 is a flowchart illustrating a control method of a microwave cooking appliance according to an embodiment of the present invention;

fig. 2 is a schematic circuit diagram of a microwave cooking appliance according to an embodiment of the present invention;

fig. 3 to 4 are schematic block diagrams of a microwave cooking appliance according to an embodiment of the present invention.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present invention, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, as well as, for example, fixedly coupled, detachably coupled, or integrally coupled, unless otherwise specifically indicated and defined. Either mechanically or electrically. Can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The disclosure herein provides many different embodiments or examples for implementing different structures of the invention. To simplify the present disclosure, components and arrangements of specific examples are described herein. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

Referring to fig. 1 to 3, an embodiment of the present invention provides a control method of a microwave cooking appliance 100. The microwave cooking appliance 100 includes a magnetron 14 and a filament loop 16, the magnetron 14 including a filament, the filament loop 16 including a first switching element 18 connected in series with the filament, the first switching element 18 being in a closed state. The control method comprises the following steps:

step 101, controlling the power supply module 12 to supply power to the magnetron 14 under the condition that the microwave instruction is acquired;

step 103, when the magnetron 14 completes the starting oscillation, the first switch member 18 is controlled to be turned off or to be in an on-off mode.

In the above control method, when the magnetron 14 completes the starting, the first switch element 18 is controlled to be turned off or enter the on-off mode, at this time, the filament can continuously keep emitting electrons at high temperature by utilizing the characteristic of secondary back-rolling of the filament electrons, so that the sustainable normal operation of the magnetron 14 can be kept, and the filament loop 16 is in an off or on-off state, so that the filament energizing time can be reduced, the service life of the magnetron 14 can be prolonged, the energy consumption can be reduced, and the working efficiency of the magnetron 14 can be further improved.

Specifically, the microwave cooking appliance 100 includes, but is not limited to, an electric appliance for cooking using microwaves, such as a microwave oven, a microwave rice cooker, etc. Referring to fig. 2, the microwave cooking appliance 100 may include a computer board 22 (a main control terminal) and a power module 12, wherein the computer board 22 is provided with a controller 24, and the power module 12 may include a transformer 26. Computer board 22 may be electrically connected to power module 12. The computer board 22 also has a button or touch screen connected thereto through which a user can input a microwave instruction to start cooking. Normally, the first switching element 18 is in a closed state and the filament loop 16 is conductive. In the event that a microwave command is received by the controller 24, the power module 12 is controlled to supply power to the magnetron 14. It will be appreciated that in other embodiments, the power module 12 may also include an AC power source or an inverter circuit.

On the primary side of the transformer 26, the transformer 26 may include a primary power supply circuit 28, where the primary power supply circuit 28 is connected to an ac power source, which may be mains or an ac power source converted from mains. The primary power supply circuit 28 may also include a rectifying circuit, a filtering circuit, and the like.

The magnetron 14 includes an anode, which is one of the main components of the magnetron 14, and a filament (cathode), which forms a space in which electrons interact with a high-frequency electromagnetic field together with the cathode, and in which the electrons perform the task of energy conversion under the action of a constant magnetic field and a constant electric field. The cathode of the magnetron 14, i.e., the emitter of electrons, has the ability to emit electrons when heated to a prescribed temperature by an electric current, and its performance has a great influence on the operation characteristics and lifetime of the magnetron 14, and is regarded as the heart of the whole tube.

A filament circuit 16 (secondary winding 1) and a high-voltage circuit 30 (secondary winding 2) are connected to the secondary side of the transformer 26, the high-voltage circuit 30 connecting the rectifier module and the anode of the magnetron 14, and the filament circuit 16 connecting the filament (cathode) of the magnetron 14. With primary power supply 28 on, high voltage circuit 30 generates a high voltage via transformer 26 to provide the required high voltage to the anode, and first switch element 18, when closed, energizes filament circuit 16 on the filament, causing the filament to heat up and emit electrons.

In the related art, the magnetron power supply control scheme is that after a computer board receives the instruction requirement of a microwave function, a relay of a power supply module is controlled to be attracted, and the power supply module supplies power to a magnetron. At this time, the filament current is in an uncontrollable state, the cathode temperature rise is too high after long-time energization, the filament material evaporates too fast, and the service life is shortened.

In the embodiment of the present invention, when the magnetron 14 completes the starting oscillation, the controller 24 may control the first switch 18 to be turned off or enter the on-off mode, so that the filament current is turned off, and at this time, the magnetron 14 keeps working due to the self-back characteristic, and the filament current is turned off or enters the on-off mode, so that the cathode is effectively prevented from overheating, the service life of the magnetron 14 is prolonged, and meanwhile, the energy efficiency of the magnetron 14 is also improved after the filament loop 16 is turned off. In one embodiment, the computer board 22 may be connected to the first switch 18 through the signal line 34, so that the control of the on and off states of the first switch 18 may be ensured to be precise.

In the on-off mode, the controller 24 may control the first switching member 18 to be alternately turned on and off during the cooking time period of the microwave cooking appliance 100.

In some embodiments, referring to fig. 2 and 4, step 101 includes:

upon acquisition of the microwave command, the second switch 32 of the primary power circuit 28 of the transformer 26 of the power module 12 is controlled to be closed to cause the power module 12 to supply power to the magnetron 14.

Thus, the power supply to the magnetron 14 is simple, and the cooking efficiency can be improved.

Specifically, in the embodiment shown in fig. 2, the power module 12 includes a transformer 26, the transformer 26 includes a primary power supply circuit 28, the primary power supply circuit 28 includes a second switch element 32, and the controller 24 may control the second switch element 32 to be closed to turn on the primary power supply circuit 28 when the microwave command is acquired, the transformer 26 operates, and the transformer 26 supplies power to the magnetron 14 located on the secondary side of the transformer 26. By controlling the closing of the second switching element 32, the magnetron 14 can be supplied with power, the control manner is simple, and the cooking efficiency can be improved.

In one embodiment, the computer board 22 may be connected to the second switch element 32 through the signal line 34, so that accurate control of the on and off states of the second switch element 32 may be ensured.

In certain embodiments, step 103 comprises:

after the power supply module 12 supplies power to the magnetron 14 for a preset period of time, it is determined that the magnetron 14 completes starting the oscillation.

In this way, it can be determined that the magnetron 14 is completely oscillated.

Specifically, in the case where the magnetron 14 completes the starting, even if the filament current is turned off, the magnetron 14 can continue to operate with its own re-strike characteristic. After the power module 12 supplies power to the magnetron 14 for a preset period of time, the controller 24 can consider that the magnetron 14 is completely started, and at this time, the controller 24 can control the first switch member 18 to be turned off or enter an on-off mode.

In some embodiments, the predetermined duration is selected from the range [5s,8s ].

In this way, a better balance can be achieved between ensuring the cooking effect and the life of the filament and the operating efficiency of the magnetron 14.

Specifically, if the preset duration is less than 5s (seconds), the filament preheating duration of the magnetron 14 is insufficient, resulting in fewer electrons being emitted, affecting the effect of microwave cooking. If the preset time period is longer than 8s, the filament energizing time period is longer, and the service life of the filament and the working efficiency of the magnetron 14 are affected. The predetermined duration is selected from the range 5s,8s, a good balance is achieved between the cooking effect and the filament lifetime and the operating efficiency of the magnetron 14.

The preset time period T is selected from the range [5s,8s ], namely, T is more than or equal to 5s and less than or equal to 8s. In one example, the preset time period T may be 5s, 6s, 7s, 8s, or other values between 5s and 8s.

In one example, t=8s, after the power module 12 supplies power to the magnetron 14 for 8s, the magnetron 14 may be considered to be completely activated, and the controller 24 may control the first switch member 18 to open or enter an on-off mode.

In some embodiments, in the on-off mode, the open time of the first switch 18 is greater than the closed time of the first switch 18.

Thus, the service life of the magnetron 14 can be prolonged and the working efficiency of the magnetron 14 can be improved.

Specifically, the microwave instructions may include a cooking time period, and after the magnetron 14 completes the start-up, the remaining cooking time period may be divided into a plurality of cooking cycles, each of which is divided into an energization time period and a de-energization time period in a certain proportion. During the power-on period, the controller 24 may control the first switching element 18 to close to energize the filament, and during the power-off period, the controller 24 may control the first switching element 18 to open to de-energize the filament.

The opening time of the first switch element 18 is longer than the closing time of the first switch element 18, so that the power-off time of the filament is longer than the power-on time in the cooking time, the service life of the filament is prolonged, the energy consumption is reduced, the service life of the magnetron 14 is prolonged, and the working efficiency of the magnetron 14 is improved.

It will be appreciated that in other embodiments, the open duration of the first switch 18 may be less than or equal to the closed time of the first switch 18.

In certain embodiments, the first and second switchgears 18 and 32 comprise relays.

Thus, the control mode of the switch piece is simple and reliable.

Specifically, the relays may be connected to the primary power supply circuit 28 and the filament loop 16, respectively, the relay of the primary power supply circuit 28 may be connected in series with the ac power source, and the relay of the filament loop 16 may be connected in series with the filament. The controller 24 may connect the two relays via signal lines 34.

Upon acquisition of the microwave command, the controller 24 may control the relay to close to cause the power module 12 to power the magnetron 14 and energize the filament. Normally, the relay of the primary power supply circuit 28 is in an open state and the relay of the filament loop 16 is in a closed state.

Referring to fig. 2 to 4, a microwave cooking appliance 100 according to an embodiment of the present invention includes a magnetron 14, a filament loop 16, a power module 12, and a controller 24. The magnetron 14 comprises a filament, the filament loop 16 being provided with a first switching element 18, the first switching element 18 being connected in series with the filament, the first switching element 18 being in a closed state. The controller 24 is electrically connected to the power module 12 and the first switch 18, and the controller 24 is configured to:

in the case of acquiring the microwave instruction, controlling the power supply module 12 to supply power to the magnetron 14;

in case the magnetron 14 completes the start-up, the first switching member 18 is controlled to be turned off or put into an on-off mode.

In the above microwave cooking electrical apparatus 100, when the magnetron 14 completes the starting oscillation, the first switch element 18 is controlled to be turned off or enter the on-off mode, at this time, the filament can continue to emit electrons at high temperature by utilizing the characteristic of secondary back-rolling of the filament electrons, so as to keep sustainable normal operation of the magnetron 14, and the filament loop 16 is in an off or on-off state, so that the filament on-time can be reduced, the service life of the magnetron 14 can be prolonged, the energy consumption can be reduced, and the working efficiency of the magnetron 14 can be further improved.

In certain embodiments, the controller 24 is configured to: upon acquisition of the microwave command, the second switch 32 of the primary power circuit 28 of the transformer 26 of the power module 12 is controlled to be closed to cause the power module 12 to supply power to the magnetron 14.

Thus, the power supply to the magnetron 14 is simple, and the cooking efficiency can be improved.

In certain embodiments, the controller 24 is configured to: after the power supply module 12 supplies power to the magnetron 14 for a preset period of time, it is determined that the magnetron 14 completes starting the oscillation.

In this way, it can be determined that the magnetron 14 is completely oscillated.

An embodiment of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the control method of any of the above embodiments.

In particular, the controller 24 may include a processor and a storage medium. In one embodiment, a control method of a microwave cooking appliance, which is implemented by a computer program when executed by a processor, includes:

step 101, controlling the power supply module 12 to supply power to the magnetron 14 under the condition that the microwave instruction is acquired;

step 103, when the magnetron 14 completes the starting oscillation, the first switch member 18 is controlled to be turned off or to be in an on-off mode.

It should be noted that the explanation of the embodiments and the advantageous effects of the control method of the microwave cooking appliance 100 described above is also applicable to the microwave cooking appliance 100 and the computer-readable storage medium of the present embodiment,

in summary, the invention can bring at least the following beneficial effects:

the study is conducted to solve the problem that the service life of novel filament materials of some magnetrons 14 is not longer than that of thorium tungsten filaments, a novel control mode is provided, a filament loop 16 is cut off after the magnetrons 14 are started for a period of time, and continuous electrons are continuously generated by utilizing the back-rolling characteristic of the magnetrons 14, so that the magnetrons 14 continue to work normally. The filament only needs to be electrified at the initial working time of the magnetron 14, so that the service life of the filament can be effectively prolonged, the reliability of the magnetron 14 is improved, and meanwhile, the energy efficiency of a product is also improved. The heating power of the filament can be reasonably adjusted to avoid overheating of the filament.

It is understood that the computer program comprises computer program code. The computer program code may be in the form of source code, object code, executable files, or in some intermediate form, among others. The computer readable storage medium may include: any entity or device capable of carrying computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a software distribution medium, and so forth. The processor may be a central processing unit, but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," 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 this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A control method of a microwave cooking appliance, the microwave cooking appliance comprising a magnetron and a filament loop, the magnetron comprising a filament, the filament loop comprising a first switch element in series with the filament, the first switch element being in a closed state, the control method comprising:

under the condition that a microwave instruction is acquired, a power supply module is controlled to supply power to the magnetron;

and under the condition that the magnetron completes starting, the first switch piece is controlled to be disconnected or enter an on-off mode.

2. The control method according to claim 1, wherein controlling the power supply module to supply power to the magnetron in the case where the microwave instruction is acquired comprises:

and when the microwave instruction is acquired, controlling a second switch piece of a primary power supply circuit of a transformer of the power supply module to be closed so as to enable the power supply module to supply power to the magnetron.

3. The control method according to claim 1, wherein controlling the first switching member to be turned off or to be put into an on-off mode in a case where the magnetron completes the starting of the oscillation includes:

after the power supply module supplies power to the magnetron for a preset time period, the magnetron is determined to finish starting vibration.

4. A control method according to claim 3, characterized in that the preset duration is selected from the range [5s,8s ].

5. The control method according to claim 1, characterized in that in the on-off mode, an off-time of the first switching member is greater than an on-time of the first switching member.

6. The control method according to claim 2, wherein the first switching member and the second switching member include relays.

7. A microwave cooking appliance, comprising:

a magnetron including a filament;

the filament loop is provided with a first switch piece, the first switch piece is connected with the filament in series, and the first switch piece is in a closed state;

a power module;

the controller is electrically connected with the power module and the first switch piece and is used for:

controlling the power supply module to supply power to the magnetron under the condition that a microwave instruction is acquired;

and under the condition that the magnetron completes starting, the first switch piece is controlled to be disconnected or enter an on-off mode.

8. The microwave cooking appliance of claim 7, wherein the controller is configured to:

and when the microwave instruction is acquired, controlling a second switch piece of a primary power supply circuit of a transformer of the power supply module to be closed so as to enable the power supply module to supply power to the magnetron.

9. The microwave cooking appliance of claim 7, wherein the controller is configured to:

after the power supply module supplies power to the magnetron for a preset time period, the magnetron is determined to finish starting vibration.

10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, realizes the steps of the control method of a microwave cooking appliance according to any one of claims 1-6.

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