CN111586910A - Mixed frequency heating system - Google Patents
Mixed frequency heating system Download PDFInfo
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- CN111586910A CN111586910A CN201910120351.9A CN201910120351A CN111586910A CN 111586910 A CN111586910 A CN 111586910A CN 201910120351 A CN201910120351 A CN 201910120351A CN 111586910 A CN111586910 A CN 111586910A
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- heating system
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- power supply
- frequency
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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
- H05B6/66—Circuits
- H05B6/68—Circuits for monitoring or control
- H05B6/687—Circuits for monitoring or control for cooking
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- Electromagnetism (AREA)
- Control Of High-Frequency Heating Circuits (AREA)
Abstract
The mixed frequency heating system of the invention at least comprises: the shielding cavity is grounded; the N radiation assemblies are respectively arranged in the shielding cavity, and N is a positive integer; the N frequency power generation mechanisms are respectively connected with the N radiation assemblies; the control unit is connected with the N frequency power generation mechanisms; and the power supply module is respectively connected with the control unit and the N frequency power generation mechanisms. Compared with the prior art, the mixed frequency heating system has the following advantages: the heating time of the food is shortened, the heating uniformity of the food is improved, and the mouthfeel of the food is improved.
Description
Technical Field
The present invention relates to a hybrid frequency heating system.
Background
At present, the microwave oven is utilized to cook or heat food materials, so that the conditions of uneven cooling and heating after the food is heated and poor taste of the food are easy to occur, and the use requirements of users cannot be well met.
Disclosure of Invention
In view of the drawbacks of the prior art, the present invention aims to provide a mixed frequency heating system that solves the above mentioned technical problems.
To solve the above technical problem, the present invention provides a mixed frequency heating system, at least comprising: the shielding cavity is grounded; the N radiation assemblies are respectively arranged in the shielding cavity, and N is a positive integer; the N frequency power generation mechanisms are respectively connected with the N radiation assemblies; the control unit is connected with the N frequency power generation mechanisms; and the power supply module is respectively connected with the control unit and the N frequency power generation mechanisms.
Preferably, the N frequency power generation mechanisms are all solid state power source mechanisms, or are all magnetron source mechanisms, or are partially solid state power source mechanisms, and the rest is a magnetron source mechanism.
Preferably, the solid-state power source mechanism comprises a signal source, a solid-state power amplifier, a filter and a measuring unit which are connected in sequence; the control unit is respectively connected with the signal source, the solid-state power amplifier and the measuring unit; the signal source is connected with the solid-state power amplifier; the filter is connected with the solid-state power amplifier and the measuring unit; the power supply module is connected with the solid-state power amplifier and the control unit.
Preferably, the power supply module comprises a first low-voltage direct-current power supply and a second low-voltage direct-current power supply; the first low-voltage direct-current power supply is connected with the control unit, and the second low-voltage direct-current power supply is connected with the solid-state power amplifier.
Preferably, the solid-state power amplifier is a semiconductor power amplifier.
Preferably, the signal source is a frequency-adjustable signal source.
Preferably, the magnetron source mechanism comprises a magnetron, and the power supply module is connected with the magnetron.
Preferably, the power supply module comprises a direct current high voltage power supply.
Preferably, the control unit at least comprises a microcontroller and a UI interaction module which communicate with each other.
Preferably, the material of the shielding cavity comprises metal.
Compared with the prior art, the mixed frequency heating system has the following advantages: the heating time of the food is shortened, the heating uniformity of the food is improved, and the mouthfeel of the food is improved.
Drawings
Other characteristic objects and advantages of the invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following figures.
FIG. 1 is a block diagram of a hybrid frequency heating system of the present invention.
FIG. 2 is a schematic diagram of an embodiment of a frequency power generating mechanism of a mixed frequency heating system according to the present invention;
FIG. 3 is a schematic diagram of a frequency power generating mechanism of a mixed frequency heating system according to an embodiment of the present invention.
In the figure:
1-power supply module 2-first frequency generating mechanism 3-first radiating component
4-food 5-second radiation assembly 6-second frequency generating mechanism
7-control unit 8-signal source 9-solid-state power amplifier
10-filter 11-measuring unit 12-magnetron
13-input end 14-Nth frequency generating mechanism 15-Nth radiation component
16-shielded cavity
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention.
FIG. 1 is a block diagram of a mixed frequency heating system. The mixed frequency heating system comprises N power sources with different frequency outputs, wherein N is a positive integer at least larger than 1 and is respectively a first frequency power generation mechanism 2 to an Nth frequency power generation mechanism 14. The food heating effect is different at different frequencies, the food heating effect has advantages and disadvantages, the food is heated by adopting microwave (such as 2450MHz,915MHz, 433MHz and the like), the energy conversion efficiency is higher, the penetration depth of the frequency is lower, the uniformity is poorer, and the microwave heating device is suitable for heating the food; the food is heated by adopting radio frequency (such as 27.12MHz,40.68MHz and the like), so that the energy conversion efficiency is low, the penetration depth of the frequency is good, the uniformity is good, and the food thawing device is suitable for thawing the food; the N groups of power with different frequencies are used for heating the food 4 together, so that the advantages can be better integrated and the disadvantages can be complemented. The N frequency generation sources may be magnetron power sources, solid semiconductor power sources, or a mixture of two sources, and the generation of the two sources will be described below.
The first radiation component 3, the second radiation component 5 and the Nth radiation component 15 are arranged in the shielding cavity 16, the radiation components comprise a feed unit and a radiation unit, the radiation unit can be a waveguide, a surface antenna, a line antenna and the like, the size of the radiation unit can be determined according to the frequency of radiation required, the radiation components are used for radiating power energy generated by a power source into the shielding cavity 16 so as to heat food 4, and the shielding cavity 16 is made of metal or comprises metal. The shielded cavity 16 is connected to ground, and the shielded cavity 16 functions to prevent radio frequency power from leaking outside the cavity.
The control unit 7 is a control center of the whole system, and the control unit 7 at least comprises a microcontroller and a UI interaction module which are communicated with each other. The microcontroller can control whether the first group of frequency power is output to the Nth group of frequency power or not and control the output power, and if the power generation source comprises the signal source 8 and the solid-state power amplifier 9, the control unit 7 can also control the output frequency of the signal source, collect radio frequency measurement parameters, monitor the matching state of the output end of the solid-state power amplifier and the like. The UI interaction module in the control unit 7 may include a display module, a key module, a sound module, and the like, and a user may perform operations such as function selection and setup through the UI interaction module.
The power supply module 1 is responsible for supplying power to the control unit 7, the first frequency power generation mechanism 2, the second frequency power generation mechanism 6 and the nth frequency power generation mechanism 14, and the control unit 7 can control and read the working states of the power supply module, such as voltage, current, temperature, on/off and the like. The input end 13 of the power supply module is connected with the mains supply, such as 220V or 110V.
Fig. 2 is a power source scheme of a mixed frequency heating system provided by the present invention. The scheme comprises a control unit 7, a power supply module 1 and a magnetron 12.
At least one of the power supply modules 1 converts the commercial power into a power supply with direct-current high-voltage output, and the power supply provides electric energy for the magnetron 12. The power supply module 1 is connected with the control unit 7 and the magnetron 12, the magnetron 12 can generate the heating power required by the system when heating the food 4, the magnetron 12 which can generate the frequency of about 2.45GHz and 915MHz can be selected usually, the magnetron 12 needs the power supply module 1 to provide direct current high voltage when working, the control unit 7 can control whether the power of the magnetron 12 is output or not by controlling whether the direct current high voltage of the power supply module 1 is output or not, and the control unit 7 can also control the output power of the magnetron 12 by controlling the output size or the average voltage size of the direct current high voltage of the power supply module 1.
Fig. 3 is a power source scheme of another mixed frequency heating system provided by the present invention. The scheme comprises a signal source 8, a solid-state power amplifier 9, a control unit 7, a measuring unit 11, a power supply module 1 and a filter 10.
The solid-state power amplifier 9 is connected between the signal source 8 and the filter 10, the solid-state power amplifier 9 is a power amplifier adopting a semiconductor power device, and devices such as LDMOS or GaN can be generally adopted; the control unit 7 is further connected with the signal source 8, the solid-state power amplifier 9 and the measuring unit 11 respectively.
The control unit 7 can control the signal source 8 to be turned on and off, and can also control the output frequency of the signal source 8; the signal source 8 can generate the heating frequency required by the system when heating the food 4, the heating frequency can be selected from frequency groups of 2450MHz,915MHz, 433MHz, 40.68MHz, 27MHz and the like, and the frequency power output by the signal source 8 module is very small; the solid-state power amplifier 9 can amplify the frequency signal with small power to generate high-power energy which can be rapidly heated. The solid state power amplifier 9 is used to amplify the frequency signal generated by the signal source 8 to a suitable power and to pass this portion of the power to the filter 10.
The filter 10 is connected between the solid-state power amplifier 9 and the measuring unit 11, and the filter 10 is used as a frequency selection module and can filter out signals outside a frequency band of frequency power signals output by the solid-state power amplifier 9. The filter 10 is effective to prevent power at other frequencies from coupling into its own frequency generating mechanism chain.
The measuring unit 11 is connected between the filter 10 and the radiation component, and the measuring unit 11 is also connected with the control unit 7; the measuring unit 11 is used for measuring the matching state and the output power of the output end of the solid-state power amplifier 9 and transmitting the information of the matching state and the power to the control unit 7; the measuring unit 11 also delivers the frequency power signal of the output of the solid-state power amplifier 9 to the radiating component.
The power supply module 1 is connected with the control unit 7 and the solid-state power amplifier 9, and the power supply module 1 provides direct-current electric energy for the control unit 7 and the solid-state power amplifier 9.
The mixed frequency heating has the advantages of combining the advantages of heating food at different frequencies, complementing the disadvantages of heating food at different frequencies, shortening the heating time of food 4, improving the heating uniformity of food 4 and improving the taste of food 4.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. A mixed frequency heating system, comprising at least:
the shielding cavity is grounded;
the N radiation assemblies are respectively arranged in the shielding cavity, and N is a positive integer;
the N frequency power generation mechanisms are respectively connected with the N radiation assemblies;
the control unit is connected with the N frequency power generation mechanisms;
and the power supply module is respectively connected with the control unit and the N frequency power generation mechanisms.
2. The hybrid frequency heating system of claim 1, wherein the N frequency power generating mechanisms are all solid state power source mechanisms, or are all magnetron source mechanisms, or are partially solid state power source mechanisms, and the remainder are magnetron source mechanisms.
3. The mixed frequency heating system of claim 2, wherein the solid state power source mechanism comprises a signal source, a solid state power amplifier, a filter, and a measurement unit connected in sequence; wherein
The control unit is respectively connected with the signal source, the solid-state power amplifier and the measuring unit;
the signal source is connected with the solid-state power amplifier;
the filter is connected with the solid-state power amplifier and the measuring unit;
the power supply module is connected with the solid-state power amplifier and the control unit.
4. The hybrid frequency heating system of claim 3, wherein the power module comprises a first low voltage DC power supply and a second low voltage DC power supply; wherein
The first low-voltage direct-current power supply is connected with the control unit, and the second low-voltage direct-current power supply is connected with the solid-state power amplifier.
5. The hybrid frequency heating system of claim 3 or 4, wherein the solid state power amplifier is a semiconductor power amplifier.
6. The mixed frequency heating system of claim 3, wherein the signal source is a frequency tunable signal source.
7. The hybrid frequency heating system of claim 2, wherein the magnetron source mechanism comprises a magnetron, the power supply module being connected to the magnetron.
8. The hybrid frequency heating system of claim 7, wherein the power module comprises a direct current high voltage power supply.
9. The mixed frequency heating system of claim 1, wherein the control unit comprises at least a microcontroller and a UI interaction module in communication with each other.
10. The hybrid frequency heating system of claim 1, wherein the material of the shielded cavity comprises a metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910120351.9A CN111586910A (en) | 2019-02-18 | 2019-02-18 | Mixed frequency heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910120351.9A CN111586910A (en) | 2019-02-18 | 2019-02-18 | Mixed frequency heating system |
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| CN111586910A true CN111586910A (en) | 2020-08-25 |
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| CN201910120351.9A Pending CN111586910A (en) | 2019-02-18 | 2019-02-18 | Mixed frequency heating system |
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2019
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Application publication date: 20200825 |