阅读说明：本技术 一种半导体微波加热设备及其控制方法 (Semiconductor microwave heating equipment and control method thereof ) 是由 朱泽春 乔中义 于 2019-03-08 设计创作，主要内容包括：本发明揭示了一种半导体微波加热设备的控制方法,包括：获取烹饪食谱信息；根据烹饪食谱信息确定相应的加热频段；在加热频段内调节实际加热频率。基于本发明所揭示的方法,半导体微波加热设备可以根据烹饪食谱信息进行自动烹饪,在无需用户监督的情况下高效、均匀地加热食材,制作出美味的菜品。本发明同时还揭示了一种半导体微波加热设备,该设备能够获取烹饪食谱信息,并按照烹饪食谱信息智能地调节实际加热频率,高效、均匀地对食材进行加热。(The invention discloses a control method of semiconductor microwave heating equipment, which comprises the following steps: acquiring cooking recipe information; determining a corresponding heating frequency band according to the cooking recipe information; the actual heating frequency is adjusted within the heating frequency band. Based on the method disclosed by the invention, the semiconductor microwave heating equipment can automatically cook according to the cooking recipe information, efficiently and uniformly heat the food material without the supervision of a user, and delicious dishes are prepared. The invention also discloses semiconductor microwave heating equipment which can acquire cooking recipe information, intelligently adjust actual heating frequency according to the cooking recipe information and efficiently and uniformly heat food materials.)

1. A control method of a semiconductor microwave heating device is characterized by comprising the following steps:

acquiring cooking recipe information;

determining a corresponding heating frequency band according to the cooking recipe information;

adjusting the actual heating frequency within the heating frequency band.

2. The method of claim 1, wherein the cooking recipe information comprises a food material type,

the step of determining the corresponding heating frequency band according to the cooking recipe information comprises the following steps:

determining a frequency oscillation point matched with the food material type according to the food material type;

and selecting frequency interception points on the left side and the right side of the frequency oscillation point, and determining a frequency range between the frequency interception points as a heating frequency band, wherein the return loss rate corresponding to any frequency value in the heating frequency band is higher than a first threshold value.

3. The method of claim 1, wherein the step of adjusting the actual heating frequency within the heating frequency band comprises: adjusting the actual heating frequency within the heating frequency band according to a preset heating mechanism, wherein the preset heating mechanism at least comprises: traversing the frequency value in the heating frequency band to heat the food material to be heated; or randomly selecting a frequency value or a combination of frequency values in the heating frequency band, and heating the food material to be heated according to the randomly selected frequency value or the combination of frequency values.

4. The method of any one of claims 1-3, wherein the heating frequency band comprises a plurality of heating frequency bands, and wherein the step of adjusting the actual heating frequency within the heating frequency band further comprises: determining a switching timing between the plurality of heating frequency bands according to the return loss rate.

5. The method according to claim 4, wherein the cooking recipe information further comprises a cooking step of performing a full-band microwave scanning during the heating process, performing an integration of the return loss rates in the plurality of heating frequency bands according to the scanning result, and switching to a heating frequency band matched with the cooking step according to the integration result to heat the food material to be heated.

6. The method of claim 5, wherein the cooking step comprises at least a simmer step and a fire step; the step of heating the food material to be heated by switching to the heating frequency band matched with the cooking step according to the integral result comprises the following steps: and the slow fire heating step is correspondingly switched to a heating frequency band with a smaller integral result, and the strong fire heating step is correspondingly switched to a heating frequency band with an increased integral result.

7. The method of claim 4, wherein the step of determining the timing of switching between the plurality of heating bands based on the return loss rate comprises:

when the return loss rate is smaller than a second threshold value, switching among the plurality of heating frequency bands; alternatively, the first and second electrodes may be,

and when the change value of the return loss rate is larger than a third threshold value, switching among the plurality of heating frequency bands.

8. The method according to claim 2, characterized in that the return loss rate is characterized by calculating a power reflectance ratio, wherein the power reflectance ratio N-10 lg (pin/pin), pin represents the reflected power determined by echo detection, and pin represents the output power of the semiconductor microwave heating device.

9. The semiconductor microwave heating equipment is characterized in that the acquisition module is used for acquiring cooking recipe information, and the heating control module is used for determining a corresponding heating frequency band according to the cooking recipe information and controlling the microwave heating module to adjust actual heating frequency in the heating frequency band.

10. A semiconductor microwave heating apparatus as claimed in claim 9 wherein the heating frequency band includes a plurality of heating frequency bands, the heating control module further determining a switching timing between the plurality of heating frequency bands based on a return loss rate.

Technical Field

The invention relates to the field of microwave control, in particular to a control method of semiconductor microwave heating equipment. The invention also relates to semiconductor microwave heating equipment.

Background

With the development of microwave technology, semiconductor microwave heating sources are gradually replacing traditional magnetrons and are applied to cooking household appliances, such as microwave ovens and rice cooker products which adopt semiconductor microwave sources for heating. However, the existing semiconductor microwave heating equipment is not intelligent enough, and cannot reasonably determine a heating mechanism according to the type of food materials, so that the heat absorption efficiency of the food materials in the heating process is low; on the other hand, some semiconductor microwave heating devices adopt a plurality of preset fixed frequencies to heat the food material in order to maintain high heating efficiency, but the heating mode easily causes uneven heating of the food material, so that the food material is scorched or half-cooked, and product experience is affected.

Therefore, a semiconductor microwave heating apparatus capable of achieving both heating efficiency and heating uniformity is widely desired in the market.

Disclosure of Invention

The invention aims to solve the technical problems in the prior art, and provides a control method of semiconductor microwave heating equipment. The invention also discloses semiconductor microwave heating equipment which can execute automatic cooking according to the recipe information and ensure the cooking quality.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a control method of a semiconductor microwave heating device comprises the following steps: acquiring cooking recipe information; determining a corresponding heating frequency band according to the cooking recipe information; the actual heating frequency is adjusted within the heating frequency band.

Further, the cooking recipe information includes a food material type, and the step of determining the corresponding heating frequency band according to the cooking recipe information includes: determining a frequency oscillation point matched with the food material type according to the food material type; frequency cut-off points are selected on the left side and the right side of the frequency oscillation point, and the frequency range between the frequency cut-off points is determined as a heating frequency band, wherein the return loss rate corresponding to any frequency value in the heating frequency band is higher than a first threshold value.

Further, the step of adjusting the actual heating frequency within the heating frequency band comprises: adjusting actual heating frequency in a heating frequency band according to a preset heating mechanism, wherein the preset heating mechanism at least comprises: traversing frequency values in the heating frequency band to heat food materials to be heated; or, the frequency value or the combination of the frequency values is selected at will in the heating frequency band, and the food material to be heated is heated by the frequency value or the combination of the frequency values selected at will.

Further, the heating frequency band comprises a plurality of heating frequency bands, and the step of adjusting the actual heating frequency within the heating frequency band further comprises: the switching timing between the plurality of heating frequency bands is determined according to the return loss rate.

Further, the cooking recipe information further comprises a cooking step, full-band microwave scanning is carried out in the heating process, integration of return loss rates is carried out in a plurality of heating frequency bands according to scanning results, and the food materials to be heated are switched to the heating frequency bands matched with the cooking step to be heated according to the integration results.

Further, the cooking step at least comprises a slow fire heating step and a strong fire heating step; the step of switching to the heating frequency band matched with the cooking step according to the integral result to heat the food material to be heated comprises the following steps: and the slow fire heating step is correspondingly switched to a heating frequency band with a smaller integral result, and the strong fire heating step is correspondingly switched to a heating frequency band with an increased integral result.

Further, the step of determining the switching timing between the plurality of heating bands according to the return loss rate comprises: when the return loss rate is smaller than a second threshold value, switching among a plurality of heating frequency bands; or when the change value of the return loss rate is larger than a third threshold value, switching among a plurality of heating frequency bands is carried out.

Further, the return loss rate is characterized by calculating a power reflectance N of 10lg (P inverse/P out), where P inverse represents the reflected power determined by the echo detection, and P out represents the output power of the semiconductor microwave heating apparatus.

The invention also discloses a semiconductor microwave heating device:

the utility model provides a semiconductor microwave heating equipment, includes acquisition module, microwave heating module and heating control module, and acquisition module is used for acquireing culinary art recipe information, and heating control module is used for confirming corresponding heating frequency channel according to culinary art recipe information to control microwave heating module and adjust actual heating frequency in heating frequency channel.

Further, the heating frequency band comprises a plurality of heating frequency bands, and the heating control module determines the switching time between the plurality of heating frequency bands according to the return loss rate.

The technical scheme of the invention has the following beneficial effects:

the control method of the semiconductor microwave heating equipment disclosed by the invention can be applied to semiconductor microwave ovens, semiconductor microwave rice cookers and other cooking equipment which adopts a semiconductor microwave source for heating, can determine a proper heating frequency band according to recipe information, and switches between different heating frequency bands in different stages in the cooking process in a frequency hopping heating mode, thereby realizing an intelligent heating mechanism corresponding to the recipe cooking process. The invention also discloses semiconductor microwave equipment which can automatically cook according to the recipe selected by the user, and the heating efficiency and uniformity are improved.

Drawings

FIG. 1 is a block diagram of the steps of one embodiment of the method of the present invention;

FIG. 2 is a graph of frequency characteristics of sweet potatoes in an embodiment of the method of the present invention;

FIG. 3 is a graph of the frequency characteristics of chicken wings in one embodiment of the method of the present invention;

FIG. 4 is a schematic diagram of the heating frequency band and the integration region in one embodiment of the method of the present invention;

FIG. 5 is a schematic flow chart of one embodiment of the method of the present invention;

FIG. 6 is a block diagram of a semiconductor microwave heating apparatus according to the present invention;

fig. 7 is a hardware schematic diagram of the semiconductor microwave heating device according to the present invention.

Detailed Description

The technical solution provided by the present invention is described in more detail by the following figures and specific embodiments:

fig. 1-3 relate to a first embodiment of the method according to the invention. Fig. 1 relates to a block diagram of steps of an embodiment of the method, which discloses a control method of semiconductor microwave heating equipment, and the method comprises the following steps:

step 101: acquiring cooking recipe information;

step 102: determining a corresponding heating frequency band according to the cooking recipe information;

step 103: the actual heating frequency is adjusted within the heating frequency band.

The method disclosed in the embodiment can adjust the heating mode according to the cooking recipe information, so that the purposes of efficient heating and uniform heating are achieved. In the microwave heating field, different cooking recipes have different requirements for firepower, so the method in the embodiment can determine a proper heating frequency band according to different cooking recipe information, reasonably adjust the actual heating frequency in the cooking process according to the cooking recipe information, and concentrate on realizing the adjustment of the actual heating frequency in the heating frequency band, thereby ensuring the heating efficiency and the heating uniformity and improving the intelligent degree of the semiconductor microwave heating equipment. After the cooking recipe information is determined, the heating process does not need to be supervised by a user, the semiconductor microwave heating equipment can automatically adjust the actual heating frequency in the corresponding heating frequency band according to the content of the cooking recipe information, and the cooking effect of food materials can be guaranteed.

As shown in fig. 2 and fig. 3, a frequency characteristic diagram of the food materials (sweet potatoes and chicken wings) involved in one embodiment of the method of the present invention is disclosed. When the structure, size, shape, material, space and the like of the semiconductor microwave heating equipment are designed and determined, the inherent resonant frequency and relevant characteristics of the microwave oven cavity are determined and cannot be changed. Accordingly, in the initial cooking state, as long as the types of the input food materials are the same, the frequency characteristic diagrams obtained by the microwave scanning are also substantially the same. Fig. 2 is a frequency characteristic diagram of sweet potatoes, in which the horizontal axis is heating frequency, and the vertical axis is power reflectance N (N is 10lg (P trans/P out)), as shown in fig. 2, because moisture contained in different food materials or different parts of food materials is different, when the food materials are heated by microwaves of different frequencies, violent oscillation of water molecules in the food materials can be caused at some proper frequencies, so that the absorption rate of microwave energy by the food materials is influenced, and the frequencies capable of causing violent oscillation of water molecules in the food materials are reflected in the frequency characteristic diagram of the corresponding food materials, namely frequency values corresponding to frequency oscillation points in fig. 2, and the frequency oscillation points are extreme points on the power reflectance waveform. The frequency characteristic diagram of the sweet potato in fig. 2 includes 4 frequency oscillation points, for example, frequency oscillation point 1 corresponds to a frequency of 860MHz, and a corresponding power reflectance is about-22.70 dB, and the frequency oscillation point is one of the extreme points on the power reflectance waveform.

Similarly, as shown in fig. 3, which is a frequency characteristic diagram of a chicken wing according to an embodiment of the method of the present invention, the number of frequency oscillation points of the chicken wing is only 3, the power reflection ratio corresponding to the frequency oscillation point 1 in fig. 3 is about-8.87 dB, and the power reflection ratio corresponding to the frequency oscillation point 2 is about-6.67 dB, so that the power reflection ratio at the frequency oscillation point 1 is smaller than the power reflection ratio at the frequency oscillation point 2, that is, the absorption rate of the microwave energy by the food material at the frequency oscillation point 1 is higher than that at the frequency oscillation point 2, if only from the perspective of improving the heating efficiency, the actual heating frequency should be controlled as close to the frequency corresponding to the frequency oscillation point as possible, and in terms of selecting different frequency oscillation points, the frequency oscillation point with smaller power reflection should be selected as far as possible to heat.

In an embodiment of the method of the present invention, the cooking recipe information includes a food material type, and the step of determining the corresponding heating frequency band according to the cooking recipe information includes:

determining a frequency oscillation point matched with the food material type according to the food material type;

and selecting frequency interception points on the left side and the right side of the frequency oscillation point, and determining a frequency range between the frequency interception points as a heating frequency band, wherein the return loss rate corresponding to any frequency value in the heating frequency band is higher than a first threshold value. In this embodiment, at least the type of the food material may be determined according to the cooking recipe information, starting from the type of the food material, a frequency oscillation point matching the type of the food material may be determined, and a heating frequency band corresponding to the cooking recipe may be determined based on the frequency oscillation point.

Fig. 4 shows an embodiment of the method of the present invention, in which a schematic diagram of the corresponding heating frequency band and the integration region is disclosed. In this embodiment, still taking chicken wings as an example, the food material is usually not heated only at the frequency corresponding to the frequency oscillation point in the heating process, otherwise, a local area of the food material is quickly scorched, and most other areas are still not sufficiently heated. For this purpose, adjustment is required between frequencies in the vicinity of the frequency oscillation point to improve heating uniformity while ensuring heating efficiency. In this case, the actual heating frequency cannot be adjusted based on the power reflectance of a single point, and a suitable heating frequency band should be determined and the overall heating efficiency in the heating frequency band should be taken into consideration. As shown in fig. 4, since there is a reverse corresponding relationship between the power reflection ratio and the return loss ratio, that is, the larger the power reflection ratio is, the smaller the return loss ratio is, that is, the smaller the microwave absorption rate of the food material is, the determination of the heating frequency band can be performed by using the return reflection value as the standard, in this embodiment, taking the frequency oscillation point 1 of the chicken wing as an example, the frequency cutoff point D and the frequency cutoff point E can be selected on the left and right sides of the frequency oscillation point 1, the frequency range between the frequency cutoff points D, E is determined as the heating frequency band, within the heating frequency range DE, the frequency value can be selected at will, the condition that the return loss rate is higher than the first threshold value can be met, namely, the food material is heated within the range with lower power reflection, therefore, the requirement of heating efficiency can be met and the requirement of uniform heating can be met by adjusting the actual heating frequency in the corresponding frequency band. Based on the principle, the heating frequency ranges corresponding to other 2 frequency oscillation points can be determined to widen the range of the actual heating frequency.

In one embodiment of the method of the present invention, the step of adjusting the actual heating frequency within the heating frequency band comprises: adjusting the actual heating frequency within the heating frequency band according to a preset heating mechanism, wherein the preset heating mechanism at least comprises: traversing the frequency value in the heating frequency band to heat the food material to be heated; or randomly selecting a frequency value or a combination of frequency values in the heating frequency band, and heating the food material to be heated according to the randomly selected frequency value or the combination of frequency values. Still taking fig. 4 as an example, 3 heating frequency bands can be correspondingly determined according to 3 frequency oscillation points of the chicken wings, and after the heating frequency bands are determined, an adjustment mechanism of the actual heating frequency in the heating frequency bands is relatively flexible, for example, the food material to be heated can be heated by traversing the frequency values in the corresponding heating frequency bands, or the food material to be heated can be heated by arbitrarily selecting the frequency values or the combination of the frequency values in the heating frequency bands. Because the return loss rate under any frequency value in the heating frequency band is in a higher state, the actual heating frequency is adjusted in the two ways, so that the actual heating frequency is changed, the purpose of uniform heating is achieved, and the overall heating efficiency in the corresponding heating frequency band is in a higher state.

In one embodiment of the method of the present invention, the heating frequency band includes a plurality of heating frequency bands, and the step of adjusting the actual heating frequency within the heating frequency band further includes: determining a switching timing between the plurality of heating frequency bands according to the return loss rate. In this embodiment, the heating frequency bands are as shown in fig. 4 and include a plurality of heating frequency bands, and in order to further improve the heating uniformity in the heating process, a mechanism of "frequency hopping heating" is adopted in this embodiment, that is, the food materials to be heated are heated in different heating frequency bands respectively. In order to achieve the purpose of frequency hopping heating, it is necessary to determine an appropriate time to switch from one heating frequency band to another heating frequency band for heating the food material to be heated. It should be noted that, since there is a corresponding relationship between the return loss rate and the power reflection ratio, if the switching time between the plurality of heating frequency bands is determined according to the power reflection ratio, it also belongs to the inventive concept of the present invention, and does not exceed the protection scope of the present invention.

In one embodiment of the method of the present invention, the cooking recipe information further includes a cooking step, in which full-band microwave scanning is performed during the heating process, the return loss rates are respectively integrated in the multiple heating frequency bands according to the scanning result, and the heating frequency band matched with the cooking step is switched to the heating frequency band to be heated according to the integration result.

In this embodiment, the cooking recipe information further includes specific cooking steps corresponding to different cooking steps, and the requirements of each stage for the fire power are different, so that switching between different heating frequency bands according to the cooking steps is required to adapt to the cooking progress. As shown in fig. 4, although there are a plurality of heating frequency bands, there is a priority for selecting the heating frequency bands, after the food material is heated for a period of time, due to evaporation of moisture and the like, the frequency corresponding to the frequency oscillation point may slightly shift (may be ignored), but the corresponding power reflectance may change, so that it is necessary to perform microwave scanning of a full frequency band (the whole operating frequency band of the semiconductor microwave heating device) again after the food material is heated for a period of time, and perform integration of the return loss rate in each of the plurality of heating frequency bands according to the scanning result (i.e. the area of the shadow below the cut-off line DE, and the area of the return loss rate corresponding to the integration of the return loss rate in the heating frequency band DE is approximately equal to the area of the triangle Δ BDE), and preferentially switch to the heating frequency band matched with the cooking step to heat the food material.

Through the integral comparison mechanism in this embodiment, can make reasonable regulation actual heating frequency, make semiconductor microwave heating equipment compromise the heating homogeneity under the higher condition of heating efficiency to match the required firepower of present culinary art step, heat the edible material of treating to heat, realize intelligent culinary art.

In one embodiment of the method of the present invention, the cooking step comprises at least a slow fire heating step and a strong fire heating step; the step of heating the food material to be heated by switching to the heating frequency band matched with the cooking step according to the integral result comprises the following steps: and the slow fire heating step is correspondingly switched to a heating frequency band with a smaller integral result, and the strong fire heating step is correspondingly switched to a heating frequency band with an increased integral result. In this embodiment, the cooking step includes at least a slow fire heating step and a strong fire heating step. In the step of heating with slow fire, the requirement on firepower is low, and the heating frequency band with a small integral result can be switched to for heating; in contrast, in the strong fire heating step, the requirement for fire power is large, and at this time, the heating frequency band with the large integration result can be switched to for heating.

In one embodiment of the method of the present invention, the step of determining the switching time between the heating frequency bands according to the return loss rate includes:

when the return loss rate is smaller than a second threshold value, switching among the plurality of heating frequency bands; alternatively, the first and second electrodes may be,

and when the change value of the return loss rate is larger than a third threshold value, switching among the plurality of heating frequency bands.

In the embodiment, the determination of the specific switching time is performed in a manner of directly determining the return loss rate itself, that is, when the return loss rate is smaller than a second threshold, switching between the plurality of heating frequency bands is performed; another way is to scale the change value of the return loss rate, and when the change value of the return loss rate is greater than a third threshold, the plurality of heating frequency bands are switched. Wherein, the return loss rate θ is P loss/pout (pout-pout)/pout, where pout is the return loss value, pout is the output power, pout is the reflected power; the change value of the return loss rate is Δ θ. Preferably, the value range of the second threshold is 50% -80%, and the value range of the third threshold is 10% -30%.

In one embodiment of the method according to the present invention, the return loss rate is characterized by calculating a power reflectance, where N is 10lg (P inverse/P out), P inverse represents the reflected power determined by echo detection, and P out represents the output power of the semiconductor microwave heating device. In the embodiment, by means of the corresponding relation between the power reflectance and the return loss rate, the corresponding return loss rate is represented by the power reflectance which is better calculated, and meanwhile, the corresponding frequency characteristic diagram is convenient to manufacture.

In one embodiment of the method of the present invention, the corresponding cooking recipe information may be sent to the semiconductor microwave heating device through the cloud, or may be directly input or selected by the user. Once the cooking recipe information is determined, the device can adjust the actual heating frequency according to the method of the invention to realize automatic cooking.

Fig. 5 is a schematic flow chart of an embodiment of the method of the present invention. The embodiment discloses a control method of semiconductor microwave heating equipment, which comprises the following steps:

step 501, a user inputs corresponding cooking recipe information: determining cooking recipe information, particularly determining a food material type and a cooking step according to information input by a user;

step 502, determining a heating frequency band according to cooking recipe information: determining a matched heating frequency band according to the cooking recipe information;

step 503, heating the food material to be heated by randomly selecting a combination of frequency values in the heating frequency band: changing the frequency value in the heating frequency band to improve the heating uniformity;

step 504, determining switching occasions within a plurality of heating frequency bands according to the return loss rate: determining a proper time, and switching among a plurality of heating frequency bands;

step 505, whether the return loss rate is less than 60%: judging whether the return loss rate is less than 60%, if so, executing a step 507, otherwise, executing a step 509;

step 506, whether the change value of the return loss rate is more than 20%: or judging whether the change value of the return loss rate is greater than 20%, if so, executing a step 507, otherwise, executing a step 509;

step 507, performing full-band microwave scanning again: rescanning to determine a suitable heating frequency band;

step 508, switching to a heating frequency band matched with the cooking step according to the integration result: preferentially switching to a heating frequency band matched with the cooking step for heating according to the integral result of the return loss rate, for example, correspondingly switching to a heating frequency band with a smaller integral result for the slow fire heating step; correspondingly switching to a heating frequency band with a larger integration result for the step of heating by strong fire;

step 509, adjusting the actual heating frequency within the heating frequency band according to a preset heating mechanism, and continuing heating until the end: and continuously adjusting the actual heating frequency within the heating frequency band according to a preset heating mechanism until the heating process is finished.

In the embodiment, the complete heating process for heating the food materials according to the cooking recipe information is disclosed, the heating efficiency and the heating uniformity can be both considered, and the program can be set to automatically execute the heating process, so that the product experience of the semiconductor microwave heating equipment is greatly improved.

As shown in fig. 6 and 7, it relates to a specific embodiment of the semiconductor microwave heating apparatus of the present invention.

Fig. 6 shows a block structure diagram of the semiconductor microwave heating apparatus according to the present invention. The invention discloses semiconductor microwave heating equipment 600 which comprises an acquisition module 601, a microwave heating module 603 and a heating control module 602, wherein the acquisition module 601 is used for acquiring cooking recipe information, and the heating control module 602 is used for determining a corresponding heating frequency band according to the cooking recipe information and controlling the microwave heating module 603 to adjust actual heating frequency in the heating frequency band. The semiconductor microwave heating device 600 in this embodiment can determine the type of the food material and the cooking step according to the cooking recipe information, so as to autonomously select a suitable heating frequency band, adjust the actual heating frequency in the corresponding heating frequency band, and control the microwave heating module 603 to cook the food material to be heated.

Fig. 7 is a hardware schematic diagram of another embodiment of the semiconductor microwave heating device according to the present invention. The semiconductor microwave heating device 700 in this embodiment includes a control module 701, a signal module 702, a power supply module 703, a power and signal amplification module 704, and a transmitting antenna board 705. The control module 701 is electrically connected with the signal module 702, the signal module 702 is electrically connected with the power module 703 and the power and signal amplification module 704, the power module 703 is electrically connected with the power and signal amplification module 704, and the power and signal amplification module 704 is electrically connected with the transmitting antenna board 705. The control module 701 is used for generating a control instruction to control the semiconductor microwave heating device 700 to work, the signal module 702 is used for generating a microwave signal, the power supply module 703 is used for supplying required electric power to the device, and the power and signal amplification module 704 is used for amplifying the microwave signal and finally transmitting the microwave signal to the outside through the transmitting antenna board.

In one embodiment of the semiconductor microwave heating device of the present invention, the heating frequency band includes a plurality of heating frequency bands, and the heating control module further determines a switching timing between the plurality of heating frequency bands according to a return loss ratio.

In this embodiment, the semiconductor microwave heating device can be switched among a plurality of heating frequency bands, thereby achieving the purpose of frequency hopping heating and improving the heating uniformity on the premise of ensuring the heating efficiency. Wherein the switching time between the heating frequency bands is mainly determined according to the return loss rate.

The above embodiments are merely illustrative of the design method of the present invention and are not intended to limit the scope of the present invention. The modifications and the conversion under the guidance of the technical scheme of the invention are all within the protection scope of the invention.