CN113848399A - Microwave oven and magnetron detection device - Google Patents
Microwave oven and magnetron detection device Download PDFInfo
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- CN113848399A CN113848399A CN202010597203.9A CN202010597203A CN113848399A CN 113848399 A CN113848399 A CN 113848399A CN 202010597203 A CN202010597203 A CN 202010597203A CN 113848399 A CN113848399 A CN 113848399A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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- 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
- H05B6/6432—Aspects relating to testing or detecting leakage in a microwave heating apparatus
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Abstract
The invention discloses a microwave oven and a magnetron detection device, wherein the device comprises: the current conversion module is used for converting the alternating current flowing through the magnetron into alternating voltage; the rectifying module is connected with the current conversion module and is used for rectifying the alternating-current voltage to obtain direct-current voltage; the sampling module is connected with the rectifying module and is used for generating sampling voltage according to the direct-current voltage; and the detection module is connected with the sampling module and is used for determining the working state of the magnetron according to the sampling voltage. Therefore, the working state of the magnetron is determined according to the sampling voltage, so that the working state of the magnetron can be monitored in real time, the abnormal working condition of the magnetron can be fed back quickly, and the overhauling and maintaining efficiency of the microwave oven is improved greatly.
Description
Technical Field
The invention relates to the technical field of microwave ovens, in particular to a microwave oven and a magnetron detection device.
Background
Microwave ovens have long been widely accepted by users for their outstanding cooking results. However, the magnetron in the microwave oven is susceptible to abnormal conditions such as over-high temperature or structural damage due to the influence of the structure of the magnetron, the matching condition with the cavity, limited heat dissipation and the like, and once the magnetron is abnormal, the microwave oven cannot work normally.
Therefore, it is very important to find the abnormal working condition of the magnetron accurately and timely, and the overhauling and maintaining efficiency of the microwave oven can be greatly improved.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, a first objective of the present invention is to provide a magnetron detection apparatus, which can monitor the working state of a magnetron in real time, quickly feed back the abnormal working condition of the magnetron, and greatly improve the overhaul and maintenance efficiency of a microwave oven.
A second object of the present invention is to provide a microwave oven.
In order to achieve the above object, a magnetron detecting apparatus according to an embodiment of the first aspect of the present invention includes: the current conversion module is used for converting the alternating current flowing through the magnetron into alternating voltage; the rectifying module is connected with the current conversion module and is used for rectifying the alternating-current voltage to obtain direct-current voltage; the sampling module is connected with the rectifying module and is used for generating sampling voltage according to the direct-current voltage; and the detection module is connected with the sampling module and is used for determining the working state of the magnetron according to the sampling voltage.
In addition, the magnetron detecting device according to the above embodiment of the present invention may further have the following additional technical features:
according to one embodiment of the invention, the current conversion module comprises: the primary coil of the current transformer is connected with the magnetron in series; the first end of the first resistor is connected with the first end of the secondary coil of the current transformer and the first input end of the rectifying module respectively, and the second end of the first resistor is connected with the second end of the secondary coil of the current transformer and the second input end of the rectifying module respectively.
According to one embodiment of the invention, the rectifier module comprises: the anode of the first diode is used as the first input end of the rectifying module and is connected with the current conversion module, and the cathode of the first diode is connected with the first input end of the sampling module; the anode of the second diode is used as a second input end of the rectifying module and is connected with the current conversion module, and the cathode of the second diode is connected with the cathode of the first diode; a cathode of the third diode is connected with an anode of the first diode, and an anode of the third diode is connected with the second input end of the sampling module; and the cathode of the fourth diode is connected with the anode of the second diode, and the anode of the fourth diode is connected with the anode of the third diode.
According to one embodiment of the invention, the sampling module comprises: a first end of the second resistor is used as a first input end of the sampling module and connected with the rectifying module, a second end of the second resistor is used as a second input end of the sampling module and connected with the rectifying module, and a second end of the second resistor is grounded; a first end of the third resistor is connected with a first end of the second resistor, and a second end of the third resistor is connected with a direct current power supply; and a first end of the fourth resistor is connected with a second end of the third resistor, and a second end of the fourth resistor is connected with the detection module.
According to an embodiment of the invention, the sampling module further comprises: and a first end of the first capacitor is connected with a second end of the third resistor, and a second end of the first capacitor is grounded.
According to an embodiment of the invention, the sampling module further comprises: and a first end of the second capacitor is connected with a second end of the fourth resistor, and a second end of the second capacitor is grounded.
According to an embodiment of the invention, the sampling module further comprises: and a second end of the third resistor is connected with the direct current power supply through the fifth diode, an anode of the fifth diode is connected with a second end of the third resistor, and a cathode of the fifth diode is connected with the direct current power supply.
According to an embodiment of the invention, the sampling module further comprises: and the anode of the sixth diode is grounded, and the cathode of the sixth diode is connected with the second end of the third resistor.
According to an embodiment of the present invention, the detection module is specifically configured to: comparing the sampling voltage with a standard sampling voltage in a normal working state of the magnetron; if the sampling voltage is greater than the standard sampling voltage, determining that the working state of the magnetron is abnormal; if the sampling voltage is lower than the standard sampling voltage, determining that the working state of the magnetron is abnormal; and if the sampling voltage is equal to the standard sampling voltage, determining that the working state of the magnetron is normal.
According to the magnetron detection device provided by the embodiment of the invention, the alternating current flowing through the magnetron can be converted into the alternating voltage through the current conversion module, the alternating voltage is rectified through the rectification module to obtain the direct voltage, the sampling voltage is generated according to the direct voltage, and the working state of the magnetron is determined according to the sampling voltage through the detection module. Therefore, the working state of the magnetron can be monitored in real time, the abnormal working condition of the magnetron can be fed back quickly, and the overhauling and maintaining efficiency of the microwave oven is improved greatly. In order to achieve the above object, a microwave oven is provided according to a second embodiment of the present invention, which includes the magnetron detecting apparatus.
According to the microwave oven disclosed by the embodiment of the invention, the working state of the magnetron can be monitored in real time through the magnetron detection device, the abnormal working condition of the magnetron can be fed back quickly, and the overhauling and maintaining efficiency of the microwave oven is greatly 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
FIG. 1 is a block schematic diagram of a magnetron detection apparatus according to an embodiment of the invention;
FIG. 2 is a schematic circuit diagram of a magnetron detection apparatus according to one embodiment of the invention;
FIG. 3 is a flow chart of a magnetron detection method according to one embodiment of the invention;
fig. 4 is a block schematic view of a microwave oven according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A microwave oven and a magnetron detecting apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings.
Fig. 1 is a block diagram schematically showing a magnetron detecting apparatus according to an embodiment of the present invention. As shown in fig. 1, the magnetron detecting apparatus 10 includes: a current conversion module 100, a rectification module 200, a sampling module 300, and a detection module 400.
The current converting module 100 is configured to convert an ac current flowing through the magnetron into an ac voltage. The rectifying module 200 is connected to the current converting module 100, and the rectifying module 200 is configured to rectify an ac voltage to obtain a dc voltage. The sampling module 300 is connected to the rectifying module 200, and the sampling module 300 is configured to generate a sampling voltage according to the dc voltage. The detection module 400 is connected to the sampling module 300, and the detection module 400 is configured to determine an operating state of the magnetron according to the sampled voltage.
It can be understood that the microwave oven cannot be normally operated when the magnetron in the microwave oven is abnormal, and thus, it is very necessary to monitor the operation state of the magnetron.
Specifically, according to the embodiment of the present invention, the current conversion module 100 may convert an ac current flowing through the magnetron into an ac voltage, and the rectification module 200 rectifies the converted ac voltage to obtain a dc voltage, so that the sampling module 300 samples the dc voltage obtained by the rectification module 200 to obtain a sampled voltage, and the sampled voltage may accurately and rapidly feed back the working state of the magnetron, for example, the embodiment of the present invention may compare the sampled voltage with a standard sampled voltage in a normal working state of the magnetron, and if the sampled voltage is greater than the standard sampled voltage, it is determined that the working state of the magnetron is abnormal; if the sampling voltage is lower than the standard sampling voltage, determining that the working state of the magnetron is abnormal; and if the sampling voltage is equal to the standard sampling voltage, determining that the working state of the magnetron is normal. Therefore, the working state of the magnetron can be timely and accurately determined, and the overhauling and maintaining efficiency of the microwave oven is greatly improved.
In order to further understand the magnetron detecting apparatus of the embodiment of the present application, the following detailed description will be given by taking a commercial microwave oven as an example, wherein there are two magnetrons.
Alternatively, according to an embodiment of the present invention, as shown in fig. 2, the current converting module 100 includes: a current transformer 101 and a first resistor R50. Wherein, the primary coil of the current transformer 101 is connected with the magnetron in series; a first terminal of the first resistor R50 is connected to a first terminal of the secondary winding of the current transformer 101 and a first input terminal of the rectification module 200, respectively, and a second terminal of the first resistor R50 is connected to a second terminal of the secondary winding of the current transformer 101 and a second input terminal of the rectification module 200, respectively.
It is understood that the current transformer 101 is an instrument for converting a large primary side current into a small secondary side current according to the principle of electromagnetic induction, and the conversion of the ac current flowing through the magnetron into the ac voltage is realized by connecting a first resistor R50 in parallel to the secondary winding of the current transformer 101.
Alternatively, according to an embodiment of the present invention, as shown in fig. 2, the rectification module 200 includes: a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4. Wherein, the anode of the first diode D1 is connected to the current conversion module 100 as the first input terminal of the rectification module 200, and the cathode of the first diode D1 is connected to the first input terminal of the sampling module 300; an anode of the second diode D2 is connected to the current converting module 100 as a second input terminal of the rectifying module 200, and a cathode of the second diode D2 is connected to a cathode of the first diode D1; the cathode of the third diode D3 is connected to the anode of the first diode D1, and the anode of the third diode D3 is connected to the second input terminal of the sampling module 300; the cathode of the fourth diode D4 is connected to the anode of the second diode D2, and the anode of the fourth diode D2 is connected to the anode of the third diode D3.
It is understood that, as shown in fig. 2, the rectifier circuit is a bridge rectifier circuit, and the working principle of the rectifier circuit is not described in detail herein to avoid redundancy, the embodiment of the present invention may rectify the ac voltage to obtain the dc voltage through the rectifier module 200.
Alternatively, according to an embodiment of the present invention, as shown in fig. 2, the sampling module 300 includes: a second resistor R51, a third resistor R52 and a fourth resistor R53. A first end of the second resistor R51 is connected to the rectifying module 200 as a first input end of the sampling module 300, a second end of the second resistor R51 is connected to the rectifying module 200 as a second input end of the sampling module 300, and a second end of the second resistor R51 is grounded; a first end of the third resistor R52 is connected with a first end of the second resistor R51, and a second end of the third resistor R52 is connected with a direct current power supply; a first end of the fourth resistor R53 is connected to a second end of the third resistor R52, and a second end of the fourth resistor R53 is connected to the detection module 400.
Therefore, according to the embodiment of the invention, the current transformer 101 converts large current into small current, the rectifier module 200 converts alternating current into direct current, and the voltage drop of the second resistor R51 is measured, so that AD sampling detection of the working current of the magnetron is realized, the working state of the magnetron can be monitored in real time, the abnormal working condition of the magnetron can be fed back quickly, and the maintenance and overhaul efficiency of the microwave oven is greatly improved.
Optionally, according to an embodiment of the present invention, as shown in fig. 2, the sampling module 300 further includes: a first capacitance E5. The first end of the first capacitor E5 is connected to the second end of the third resistor R52, and the second end of the first capacitor E5 is grounded.
It can be understood that, after the circuit is powered down, the voltage that the resistor may bear in the freewheeling circuit increases suddenly, so that, in the embodiment of the present invention, by connecting the first capacitor E5 in parallel to the circuit, the overvoltage can be absorbed, the voltage at two ends of the resistor can be stabilized, and the transient impact current can be suppressed, so that the resistor is not heated and burned due to the overvoltage, and the safety of the circuit is improved.
Optionally, according to an embodiment of the present invention, as shown in fig. 2, the sampling module 300 further includes: a second capacitor C53. The first end of the second capacitor C53 is connected to the second end of the fourth resistor R53, and the second end of the second capacitor C53 is grounded.
It is understood that the first terminal of the second capacitor C53 is connected to the second terminal of the fourth resistor R53, and the second terminal of the second capacitor C53 has a filtering function, such as ac-dc.
Optionally, according to an embodiment of the present invention, as shown in fig. 2, the sampling module 300 further includes: and a fifth diode D18. The second end of the third resistor R52 is connected to the dc power supply through a fifth diode D18, the anode of the fifth diode D18 is connected to the second end of the third resistor R52, and the cathode of the fifth diode D18 is connected to the dc power supply.
Optionally, according to an embodiment of the present invention, as shown in fig. 2, the sampling module 300 further includes: and a sixth diode D19. An anode of the sixth diode D19 is grounded, and a cathode of the sixth diode D19 is connected to the second end of the third resistor R52.
It can be understood that the fifth diode D18 and the sixth diode D19 can perform a voltage stabilizing function, and a higher stable voltage can be obtained by connecting the fifth diode D18 and the sixth diode D19 in series, so that the electronic components in the circuit are effectively protected, the electronic components are prevented from being broken down by high current, and the safety of the circuit is improved.
The following describes the implementation method of the magnetron detection device according to the embodiment of the invention in detail with reference to specific embodiments.
As shown in fig. 3, taking a commercial microwave oven as an example, there are generally two magnetrons of the commercial microwave oven, and the implementation method of the magnetron detecting device includes the following steps:
s301, magnetrons A and B work simultaneously.
S302, AD sampling the current.
S303, judging whether the current is less than 14A, if so, executing the step S304.
S304, the magnetron B is closed, and only the magnetron A is kept to work.
S305, AD sampling the current.
S306, judging whether the current is less than 7A, if so, executing the step S307, otherwise, executing the step S308.
S307, magnetron a fails.
And S308, closing the magnetron A and only keeping the magnetron B to work.
S309, AD sampling the current.
S310, judging whether the current is less than 7A, if so, executing step S3011.
S311, magnetron B fails.
To sum up, commercial microwave oven's magnetron generally has two, is magnetron A and magnetron B respectively, and operating current is 7A, carries out AD sampling back through the operating current to commercial oven in real time, according to operating current's change and magnetron's control to judge that the unusual magnetron of work is which, can promote microwave oven's maintenance and maintenance efficiency greatly, simple easily realizes.
According to the magnetron detection device provided by the embodiment of the invention, the alternating current flowing through the magnetron can be converted into the alternating voltage through the current conversion module, the alternating voltage is rectified through the rectification module to obtain the direct voltage, the sampling voltage is generated according to the direct voltage, and the working state of the magnetron is determined according to the sampling voltage through the detection module. Therefore, the working state of the magnetron can be monitored in real time, the abnormal working condition of the magnetron can be fed back quickly, and the overhauling and maintaining efficiency of the microwave oven is improved greatly.
Fig. 4 is a block schematic view of a microwave oven according to an embodiment of the present invention. As shown in fig. 4, the microwave oven 20 includes the magnetron detecting device 10 described above.
According to the microwave oven provided by the embodiment of the invention, the working state of the magnetron can be monitored in real time through the magnetron detection device, the abnormal working condition of the magnetron can be fed back quickly, and the overhauling and maintaining efficiency of the microwave oven is greatly improved.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A magnetron detecting apparatus, comprising:
the current conversion module is used for converting the alternating current flowing through the magnetron into alternating voltage;
the rectifying module is connected with the current conversion module and is used for rectifying the alternating-current voltage to obtain direct-current voltage;
the sampling module is connected with the rectifying module and is used for generating sampling voltage according to the direct-current voltage;
and the detection module is connected with the sampling module and is used for determining the working state of the magnetron according to the sampling voltage.
2. The magnetron detection apparatus of claim 1, wherein the current conversion module comprises:
the primary coil of the current transformer is connected with the magnetron in series;
the first end of the first resistor is connected with the first end of the secondary coil of the current transformer and the first input end of the rectifying module respectively, and the second end of the first resistor is connected with the second end of the secondary coil of the current transformer and the second input end of the rectifying module respectively.
3. The magnetron detection apparatus of claim 1, wherein the rectification module comprises:
the anode of the first diode is used as the first input end of the rectifying module and is connected with the current conversion module, and the cathode of the first diode is connected with the first input end of the sampling module;
the anode of the second diode is used as a second input end of the rectifying module and is connected with the current conversion module, and the cathode of the second diode is connected with the cathode of the first diode;
a cathode of the third diode is connected with an anode of the first diode, and an anode of the third diode is connected with the second input end of the sampling module;
and the cathode of the fourth diode is connected with the anode of the second diode, and the anode of the fourth diode is connected with the anode of the third diode.
4. The magnetron detection apparatus of claim 1, wherein the sampling module comprises:
a first end of the second resistor is used as a first input end of the sampling module and connected with the rectifying module, a second end of the second resistor is used as a second input end of the sampling module and connected with the rectifying module, and a second end of the second resistor is grounded;
a first end of the third resistor is connected with a first end of the second resistor, and a second end of the third resistor is connected with a direct current power supply;
and a first end of the fourth resistor is connected with a second end of the third resistor, and a second end of the fourth resistor is connected with the detection module.
5. The magnetron detection apparatus of claim 4, wherein the sampling module further comprises:
and a first end of the first capacitor is connected with a second end of the third resistor, and a second end of the first capacitor is grounded.
6. The magnetron detection apparatus of claim 4, wherein the sampling module further comprises:
and a first end of the second capacitor is connected with a second end of the fourth resistor, and a second end of the second capacitor is grounded.
7. The magnetron detection apparatus of claim 4, wherein the sampling module further comprises:
and a second end of the third resistor is connected with the direct current power supply through the fifth diode, an anode of the fifth diode is connected with a second end of the third resistor, and a cathode of the fifth diode is connected with the direct current power supply.
8. The magnetron detection apparatus of claim 4, wherein the sampling module further comprises:
and the anode of the sixth diode is grounded, and the cathode of the sixth diode is connected with the second end of the third resistor.
9. The magnetron detection apparatus of claim 1, wherein the detection module is specifically configured to:
comparing the sampling voltage with a standard sampling voltage in a normal working state of the magnetron;
if the sampling voltage is greater than the standard sampling voltage, determining that the working state of the magnetron is abnormal;
if the sampling voltage is lower than the standard sampling voltage, determining that the working state of the magnetron is abnormal;
and if the sampling voltage is equal to the standard sampling voltage, determining that the working state of the magnetron is normal.
10. A microwave oven, comprising: magnetron and magnetron inspection apparatus as claimed in any one of claims 1 to 9.
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| CN202010597203.9A CN113848399A (en) | 2020-06-28 | 2020-06-28 | Microwave oven and magnetron detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010597203.9A CN113848399A (en) | 2020-06-28 | 2020-06-28 | Microwave oven and magnetron detection device |
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| EP3179258A1 (en) * | 2015-12-10 | 2017-06-14 | ABB Schweiz AG | Electrical installation device with current sensing circuit |
| CN207198222U (en) * | 2017-09-11 | 2018-04-06 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of current sampling circuit |
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2020
- 2020-06-28 CN CN202010597203.9A patent/CN113848399A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101697430A (en) * | 2009-11-12 | 2010-04-21 | 上海交通大学 | Power control method based CT electricity getting device of high voltage transmission line |
| CN101738531A (en) * | 2009-12-31 | 2010-06-16 | 杭州凯尔达电焊机有限公司 | Method for detecting output current of inverting welding machine |
| CN102914725A (en) * | 2012-07-20 | 2013-02-06 | 王道龙 | Medium-voltage power distribution network fault monitoring device |
| CN105142254A (en) * | 2015-07-20 | 2015-12-09 | 广东美的厨房电器制造有限公司 | Microwave oven magnetron working state detection device and method and microwave oven |
| EP3179258A1 (en) * | 2015-12-10 | 2017-06-14 | ABB Schweiz AG | Electrical installation device with current sensing circuit |
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