CN105357788A - Heating method and heating device - Google Patents

Abstract

The present invention relates to the field of household appliances, and discloses a heating method and a heating device. The heating method includes: heating an object to be heated; The frequency and phase of the heating source are respectively determined as a heating frequency and a heating phase, wherein the temperature difference between the hot spots is within a predetermined range; and the heating source is controlled to perform heating at the heating frequency and the heating phase, so as to realize The purpose of uniform heating can improve the performance of the heating device and enhance the user experience.

Description

A kind of heating method and heating device

technical field

The invention relates to the field of household appliances, in particular to a heating method and a heating device.

Background technique

With the vigorous development of science and technology, there are more and more heating methods, such as microwave heating, light wave heating and so on. However, heating uniformity has always been a feature of great concern in the heating industry, especially in the microwave heating industry. From the emergence of microwave heating to the present, the problem of heating uniformity has always been a difficult problem for engineers.

A common situation is that when you heat a food (such as a cake), you need to perform corresponding auxiliary actions with the help of various auxiliary parts (such as a stirring plate, a turntable), so that it can only achieve uniform heating as much as possible. However, another kind of food (such as beef) is replaced in the same state. Due to the characteristics of the food itself, it is impossible to copy the previous heating process to achieve the same heating effect.

Contents of the invention

The object of the present invention is to provide a heating method and a heating device, the heating method can achieve uniform heating for different objects to be heated.

In order to achieve the above object, the present invention provides a heating method, which includes: heating the object to be heated; when the hot spot covers a predetermined percentage of the area occupied by the object to be heated, changing the frequency of the heating source to determining a heating frequency and a heating phase, respectively, wherein the temperature difference between the hot spots is within a predetermined range; and controlling the heating source to perform heating at the heating frequency and the heating phase.

Preferably, determining the heating frequency and the heating phase includes: scanning the temperature of the hot spot covering the area occupied by the object to be heated and determining the area of the hot spot covering the area occupied by the object to be heated; and changing the heating source frequency and phase until the difference between the scanned temperatures is within the predetermined range and the area of the hot spot reaches a predetermined percentage of the area occupied by the object to be heated.

Preferably, the heating method further includes at least one of the following: during determining the heating frequency and the heating phase, controlling the heating source to heat with a preset heating power; After the heating phase, the heating power of the heating source is controlled according to the type of the object to be heated and the required heating degree.

Preferably, the heating source is generated by the same microwave signal generating module.

Preferably, when the object to be heated is multiple objects to be heated, the heating method further includes one of the following: simultaneously heating the multiple objects to be heated by covering hot spots, and one of the objects to be heated After the heated object reaches the required heat, stop covering the hot spot heating of the object to be heated; for each object to be heated, determine the heating frequency and the heating phase, according to the heating frequency, the heating phase and the type of object to be heated The heating power required by the heating object is heated; and according to the hot spot coverage area of the object to be heated with high required heat is higher than the hot spot coverage area of the object to be heated with low heat required, the heating frequency and the heating phase are determined, Heating is performed according to the heating frequency and the heating phase.

Preferably, the heating method further includes: re-determining the heating frequency and heating phase after the state of the object to be heated changes.

Correspondingly, the present invention also provides a heating device, which includes: at least two heating sources; a controller, configured to: control the heating sources to heat the object to be heated; Accounting for a predetermined percentage of the area, the frequency and phase of the heating source at this time are determined as the heating frequency and the heating phase, respectively, wherein the temperature difference between the hot spots is within a predetermined range; and the heating source is controlled to the The heating frequency and the heating phase are used for heating.

Preferably, the heating device further includes: a temperature scanning device for scanning the temperature of a hot spot covering the area occupied by the object to be heated; and a phase shifter for changing the phase of the heating source.

Preferably, the controller further performs at least one of the following: during determining the heating frequency and the heating phase, controlling the heating source to perform heating at a preset heating frequency; After the heating phase, the heating frequency of the heating source is controlled according to the type of the object to be heated and the required heating degree.

Preferably, the heating source is generated by the same microwave signal generating module.

Preferably, when the object to be heated is a plurality of objects to be heated, the controller further performs one of the following: simultaneously heat the objects to be heated by covering hot spots of the various objects to be heated, and one of the objects to be heated After the heating object reaches the required heat, stop covering the hot spot heating of the object to be heated; for each object to be heated, determine the heating frequency and the heating phase, according to the heating frequency, the heating phase and the heating phase of the object to be heated The heating power required by the heating object is heated; and according to the hot spot coverage area of the object to be heated with high required heat is higher than the hot spot coverage area of the object to be heated with low heat required, the heating frequency and the heating phase are determined, Heating is performed according to the heating frequency and the heating phase.

Preferably, the heating device further includes feeding ports for the heating source to feed energy to the heating device, wherein the isolation between the feeding ports is less than -15dB.

Preferably, the controller is further configured to: re-determine the heating frequency and heating phase after the state of the object to be heated changes.

Through the above technical solution, the frequency and phase of the heating source when the hot spot covers a predetermined percentage of the area occupied by the object to be heated are determined as the heating frequency and the heating phase, and at this time, the temperature difference between the hot spots is within a predetermined range , using the determined heating frequency and heating phase to control the heating source to heat the object to be heated, so as to achieve the purpose of uniform heating, thereby improving the performance of the heating device and enhancing the experience of the user.

Other features and advantages of the present invention will be described in detail in the detailed description that follows.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description, together with the following specific embodiments, are used to explain the present invention, but do not constitute a limitation to the present invention. In the attached picture:

Fig. 1 is the structural block diagram of heating device provided according to the present invention;

Fig. 2 is a schematic diagram of cake heating according to an embodiment of the present invention;

Fig. 3 is a schematic diagram of the distribution of hot spots at different frequencies and phases of heating sources for cake heating;

Fig. 4 is a schematic diagram of the distribution of hot spots for cake heating under the determined heating frequency and heating phase of the heating source;

Fig. 5 is a heating schematic diagram of quick-frozen steamed bread and milk according to another embodiment of the present invention; and

Fig. 6 is the flowchart of heating method provided according to the present invention; And

FIG. 7 is a flowchart of a heating method according to an embodiment of the present invention.

Explanation of reference signs

11 heating source 12 controller

13 Feed port 14 Heating chamber

21 quick-frozen buns 22 milk

detailed description

Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

Fig. 1 is a structural block diagram of a heating device provided according to the present invention. As shown in Figure 1, the heating device provided by the present invention may include: at least two heating sources 11; a controller 12, used to: control the heating sources to heat the object to be heated; In the case of a predetermined percentage of the area, the frequency and phase of the heating source at this time are determined as the heating frequency and the heating phase, respectively, wherein the temperature difference between the hot spots is within a predetermined range; and the heating source is controlled to the heating The frequency and phase of the heating are heated.

Each frequency and phase forms a corresponding field distribution in the heating chamber. Each field distribution will form a series of regions in the heating chamber. Some regions have low energy, and some regions even have no energy. Among them, the high energy region ( energy above a certain value) are called "hot spots". The present invention controls the heating frequency and heating phase of the heating source based on the hot spot, so that during the heating process, heating is performed according to the heating frequency and heating phase that form the determined hot spot, thus ensuring heating uniformity.

The heating device 11 may also include a temperature scanning device for scanning the temperature of the hot spot covering the area occupied by the object to be heated. The temperature scanning device can be a multi-point temperature sensor or a thermal imaging device, wherein the thermal imaging device can easily detect and record the temperature in a certain area, and a multi-point temperature sensor needs to add a certain algorithm to make the collected According to the physical location of the data, the points with similar temperatures are recorded. The thermal imaging equipment and the multi-point temperature sensor are existing devices. For the purpose of brevity, no more details are given here. In addition, in order to change the phase of the heating source, the heating device 11 may further include a phase shifter.

Wherein, determining the heating frequency and the heating phase may include: for example, using a thermal imaging device to scan the temperature of the hot spot covering the area occupied by the object to be heated and determine the area of the hot spot covering the area occupied by the object to be heated; and changing the frequency and phase of the heating source (for example by a phase shifter) until the difference between the scanned temperatures is within the predetermined range and the area of the hot spot reaches a predetermined percentage of the area occupied by the object to be heated .

In order to enable the heating sources to work at the same frequency, at least two heating sources 11 can be generated by the same microwave signal generating module, and the heating sources 11 can be microwave sources.

The heating device 11 may also include a feeding port for the heating source to feed energy to the heating device, at least two feeding ports are arranged on the wall of the heating chamber, and the number thereof may be consistent with the number of the heating source; between the feeding ports It is necessary to ensure good isolation. For example, if the heating device is a semiconductor microwave heating device, the isolation between feed ports may be less than -15dB.

When determining the heating frequency and heating phase, since the purpose is not to heat the object to be heated, the controller 12 can control the heating source to heat with a lower preset heating power (for example, the total power is less than 100W) to save energy. energy; after determining the heating frequency and the heating phase, the controller 12 can control the heating power of the heating source according to the type of the object to be heated and the required heating degree, so that the object to be heated can be A suitable heating process is heated.

The heating device provided by the invention can also realize directional heating. When the object to be heated is a plurality of objects to be heated, the controller 12 may implement one of the following to realize directional heating: heat them simultaneously by covering the hot spots of the various objects to be heated, in one of them After the object to be heated reaches the required heat, stop covering the hot spot heating of the object to be heated; for each object to be heated, determine the heating frequency and the heating phase, according to the heating frequency, the heating phase and the heating phase According to the required heating power of the object to be heated for heating; and according to the hot spot coverage area of the object to be heated with high required heat is higher than the hot spot coverage area of the object to be heated with low required heat, the heating frequency and the heating frequency are determined. phase, heating is performed according to the heating frequency and the heating phase.

In addition, during the heating process (especially long-term heating), the state (molecular composition) of the object to be heated may change. At this time, the previously determined heating frequency and heating phase will not be suitable for uniform heating, and need to be re-determined. Heating frequency and heating phase.

The present invention will be described in detail below through specific embodiments, but the present invention is not limited thereto.

Fig. 2 is a schematic diagram of cake heating according to an embodiment of the present invention. As shown in FIG. 2 , a plate of cake is placed in the heating chamber 14 of the heating device. The heating device has four feeding ports corresponding to four microwave sources. After the cake is placed in the heating chamber, the microwave source can be controlled to start at low power (total power less than 100W), and then the hot spots can be scanned and analyzed. In this process, it is necessary to constantly change the frequency and phase of the microwave source, and at the same time combine the hot spot changes of the cake to determine the combination of hot spots that can fully cover the entire or most of the cake, and use the frequency and phase at this time as the microwave source. Heating frequency and heating phase.

In the process of determining the heating frequency and heating phase, the selected frequency and phase combinations are shown in Figure 3. It can be seen from Figure 3 that each frequency and phase combination corresponds to a different hot spot distribution map, and Figure 3 shows Six combinations (in fact, there are many other combinations). Once the hot spot distribution map can be superimposed to cover 80% of the heating area (as shown in Figure 4, that is, different hot spot distributions are obtained through the combination of frequency and phase within the same time, and the superposition of the hot spot area can account for the cake. 80% of the total area), stop scanning, and use the frequency and phase of the microwave source at this time as the heating frequency and phase.

Based on the determined heating frequency and heating phase, high power microwaves are used for heating. The heating power is determined according to the microwave energy required by the cake. For example, full power (greater than 600W) can be selected for cooking cakes. For other types of objects to be heated, corresponding heating power can be selected, and for other functions, such as defrosting, a power less than 400W can be used for heating. The set temperature for adding the object to be heated can be set, and the heating can be stopped when the object to be heated reaches the set temperature.

Fig. 5 is a schematic diagram of heating quick-frozen steamed bread and milk according to another embodiment of the present invention. Steamed buns 21 and milk 22 are common types of breakfast. The initial temperature of quick-frozen steamed buns 21 is generally below -5°C, and the cooking temperature needs to be above 80°C. Normal temperature milk 22 is generally around 20°C, and the cooking temperature needs to reach 50°C to 60°C. . From the point of view of temperature alone, steamed bun 21 needs more energy; in addition, because steamed bun 21 has less water content, milk 22 has high water content, and microwaves are easier to heat food with high water content. If the heating of quick-frozen steamed buns 21 and room temperature milk 22 is completed within a certain time, more energy for quick-frozen steamed buns 21 and less energy for milk will be provided. At this time, it is necessary to consider directional heating to complete the heating of the two.

Firstly, the above-mentioned hotspot scanning and analysis are adopted. The difference is that in this embodiment, it is necessary to find and record the combination of hotspots covering the quick-frozen steamed buns 21 and milk 22 respectively and together.

Then, the energy difference between the quick-frozen steamed bun 21 and the milk 22 can be realized in the following way: firstly, the hot spot combination covering the quick-frozen steamed bun 21 and the milk 22 is used to simultaneously heat the two, and then the hot spot combination covering the quick-frozen steamed bun 21 is used for heating; Use combined heating with hot spots covering quick-frozen steamed buns 21 or milk 22 respectively, use high power (such as 500W) for heating when most of the hot spots cover quick-frozen steamed buns 21, and use low power for heating when most of the hot spots cover milk 22 (such as 300W); Determine that the coverage area of the hot spot combination covering quick-frozen steamed bread 21 is 2 times of the coverage area of the hot spot combination covering milk 22, and then adopt the same power to heat.

Fig. 6 is a flow chart of the heating method provided by the present invention. As shown in Figure 6, at step S60, the object to be heated is heated; at step S61, when the hot spot covers a predetermined percentage of the area occupied by the object to be heated, the frequency and phase of the heating source at this time are respectively determined is a heating frequency and a heating phase, wherein the temperature difference between the hot spots is within a predetermined range; and at step S62, controlling the heating source to perform heating at the heating frequency and the heating phase. The heating frequency and heating phase of the heating source are controlled based on the hot spot, so that during the heating process, heating is performed according to the heating frequency and heating phase that form the determined hot spot, so as to ensure heating uniformity.

The heating method provided by the present invention will be described in detail below with reference to FIG. 7 , but it should be noted that the present invention is not limited thereto.

As shown in Figure 7, at step 71, control the heating source to heat with a preset heating power (low power), change the frequency and phase of the heating source, and scan the temperature of the hot spot covering the area occupied by the object to be heated And determine the area of the hot spot covering the area occupied by the object to be heated; at step 72, the difference between the scanned temperatures is within the predetermined range and the area of the hot spot reaches the area occupied by the object to be heated Predetermined percentage (for example 80%) of area; If do not satisfy above-mentioned condition, then return to step 71 place, if meet above-mentioned condition, then at step 73 place, according to the kind of described to-be-heated object and required heating degree control the heating power of the heating source, and heat according to the determined heating frequency and heating phase; at step 74, judge whether the object to be heated reaches the preset temperature; if it reaches the preset temperature, stop heating; if it does not reach the preset temperature Set temperature, then go to step 73.

In addition, when the object to be heated is a plurality of objects to be heated, the heating method further includes one of the following: heating them simultaneously by covering hot spots of the various objects to be heated, and one of the objects to be heated After the object reaches the required heat, stop covering the hot spot heating of the object to be heated; for each object to be heated, determine the heating frequency and the heating phase, according to the heating frequency, the heating phase and the type of object to be heated The heating power required by the object is heated; and according to the hot spot coverage area of the object to be heated with high required heat is higher than the hot spot coverage area of the object to be heated with low heat required, the heating frequency and the heating phase are determined, according to The heating frequency and the heating phase are used for heating.

Moreover, after the state of the object to be heated changes, the heating frequency and heating phase can be re-determined.

Other specific details and benefits related to the heating method are the same as those described above for the heating device, and will not be repeated here.

The preferred embodiment of the present invention has been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the specific details of the above embodiment, within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, These simple modifications all belong to the protection scope of the present invention.

In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way if there is no contradiction. The combination method will not be described separately.

In addition, various combinations of different embodiments of the present invention can also be combined arbitrarily, as long as they do not violate the idea of the present invention, they should also be regarded as the disclosed content of the present invention.

Claims (13)

1. heating means, is characterized in that, described heating means comprise:

Material to be heated is heated;

When focus covers the predetermined percentage in region shared by described material to be heated, the frequency of now heating source and phase place are defined as heating frequency and firing phase respectively, and the temperature difference between wherein said focus is in preset range; And

Control described heating source to heat with described heating frequency and described firing phase.

2. heating means according to claim 1, is characterized in that, determine that described heating frequency and described firing phase comprise:

Scanning covers the temperature of the focus in region shared by described material to be heated and determines the area of the focus covering region shared by described material to be heated; And

Change the frequency of heating source and phase place, until the difference between the temperature scanned is in described preset range and the area of described focus reaches the predetermined percentage of described material to be heated area occupied.

3. heating means according to claim 1, is characterized in that, described heating means also comprise following at least one:

During determining described heating frequency and described firing phase, control described heating source and heat with default heating power; And

After determining described heating frequency and described firing phase, control the heating power of described heating source according to the kind of described material to be heated and required degree of heat.

4. heating means according to claim 1, is characterized in that, described heating source is produced by same microwave signal generation module.

5. heating means according to claim 1, is characterized in that, when described material to be heated is multiple material to be heated, described heating means also comprise following in one:

Heated it by the focus covering described multiple material to be heated, a kind of material to be heated stops the focus heating covering this kind of material to be heated after reaching institute's calorific requirement wherein simultaneously;

For often kind of material to be heated, determine described heating frequency and described firing phase, heat according to the heating power needed for described heating frequency, described firing phase and this kind of material to be heated; And

According to the focus area coverage of the high material to be heated of the institute's calorific requirement focus area coverage higher than the low material to be heated of institute's calorific requirement, determine described heating frequency and described firing phase, heat according to described heating frequency, described firing phase.

6. heating means according to any one of claim 1 to 5, is characterized in that, described heating means also comprise: after the state of described material to be heated changes, and redefine heating frequency and firing phase.

7. a heater, is characterized in that, described heater comprises:

At least two heating sources;

Controller, for:

Control described heating source to heat material to be heated;

When focus covers the predetermined percentage in region shared by described material to be heated, the frequency of now heating source and phase place are defined as heating frequency and firing phase respectively, and the temperature difference between wherein said focus is in preset range; And

Control described heating source to heat with described heating frequency and described firing phase.

8. heater according to claim 7, is characterized in that, described heater also comprises:

Temperature scanning device, for scanning the temperature of the focus covering region shared by described material to be heated; And

Phase shifter, for changing the phase place of described heating source.

9. heater according to claim 7, is characterized in that, described controller also performs following at least one:

During determining described heating frequency and described firing phase, control described heating source and heat with default heating frequency; And

After determining described heating frequency and described firing phase, control the heating frequency of described heating source according to the kind of described material to be heated and required degree of heat.

10. heating means according to claim 7, is characterized in that, described heating source is produced by same microwave signal generation module.

11. heaters according to claim 7, is characterized in that, when described material to be heated is multiple material to be heated, described controller also perform following in one:

Heated it by the focus covering described multiple material to be heated, a kind of material to be heated stops the focus heating covering this kind of material to be heated after reaching institute's calorific requirement wherein simultaneously;

For often kind of material to be heated, determine described heating frequency and described firing phase, according to described heating frequency, described firing phase and the heating power needed for this kind of material to be heated heat; And

According to the focus area coverage of the high material to be heated of the institute's calorific requirement focus area coverage higher than the low material to be heated of institute's calorific requirement, determine described heating frequency and described firing phase, heat according to described heating frequency, described firing phase.

12. heaters according to claim 7, is characterized in that, described heater also comprises for the feed-in mouth of described heating source to heater feed in energy analysis, and the isolation wherein between feed-in mouth is less than-15dB.

13. heaters according to any one of claim 7 to 12, is characterized in that, described controller also for: after the state of described material to be heated changes, redefine heating frequency and firing phase.