Electromagnetic wave generating system and heating device having the same

Abstract

The present invention provides an electromagnetic wave generating system. The electromagnetic wave generating system includes an electromagnetic generating module, a radiation component, and a matching unit connected in series between the electromagnetic generating module and the radiation component. The electromagnetic generating module is configured to generate an electromagnetic wave signal. The radiation component includes one or more radiation units, which are configured to be electrically connected to the electromagnetic generating module to generate electromagnetic waves of corresponding frequencies according to the electromagnetic wave signal. The matching unit includes a first matching module. The first matching module includes a plurality of fixed-value inductors connected in series between the electromagnetic generating module and the radiation component, and a plurality of parallel branches. Each parallel branch of the first matching module includes a fixed-value capacitor and a switch connected in series. The input ends of the plurality of parallel branches of the first matching module are respectively connected in series between two adjacent inductors and between the end inductor and the radiation component, and the output ends are all configured to be grounded so as to more accurately match the load after receiving an adjustment instruction.

Description

Technical Field

[0001] The invention relates to kitchen utensils, in particular to an electromagnetic wave generating system and a heating device with the electromagnetic wave generating system. Background Art

[0002] During the freezing process of food, the quality of the food is maintained, but the frozen food needs to be thawed before processing or eating. In order to facilitate users to freeze and thaw food, the prior art generally thaws food by adding an electromagnetic wave device to a refrigeration and freezing device.

[0003] However, not only do foods with different properties have different dielectric constants, but foods with the same properties also change their dielectric constants as the temperature changes during the thawing process, causing the food's absorption rate of electromagnetic waves to fluctuate. Taking all factors into consideration, a highly efficient electromagnetic wave generating system that can be applied to different loads and a heating device having the electromagnetic wave generating system are required in design. Summary of the invention

[0004] An object of the first aspect of the present invention is to provide an electromagnetic wave generating system that is applicable to different loads.

[0005] A further object of the first aspect of the present invention is to increase the matching range of the matching unit.

[0006] An object of the second aspect of the present invention is to provide a heating device having the electromagnetic wave generating system.

[0007] According to a first aspect of the present invention, there is provided an electromagnetic wave generating system, comprising:

[0008] An electromagnetic generating module, configured to generate an electromagnetic wave signal;

[0009] a radiation component, comprising one or more radiation units, arranged to be electrically connected to the electromagnetic generating module to generate electromagnetic waves of corresponding frequencies according to the electromagnetic wave signal;

[0010] A matching unit is connected in series between the electromagnetic generating module and the radiation component, and is used to adjust the load impedance of the electromagnetic generating module; characterized in that the matching unit includes:

[0011] The first matching module includes a plurality of fixed-value inductors connected in series between the electromagnetic generating module and the radiation component, and a plurality of parallel branches; wherein

[0012] Each parallel branch of the first matching module comprises a fixed value capacitor and a switch in series; and

[0013] The input ends of the multiple parallel branches of the first matching module are respectively connected in series between two adjacent inductors and between the end inductor and the radiation component, and the output ends are all grounded.

[0014] Optionally, the plurality of switches of the first matching module are integrated into an array switch assembly.

[0015] Optionally, the matching unit further includes:

[0016] A second matching module is connected in series between the electromagnetic generating module and the first matching module; and

[0017] The second matching module includes a plurality of parallel branches.

[0018] Optionally, each parallel branch of the second matching module includes a fixed-value capacitor and a switch connected in series.

[0019] Optionally, the plurality of switches of the second matching module are integrated into an array switch assembly.

[0020] Optionally, the electromagnetic wave generating system further includes:

[0021] a detection unit, connected in series between the matching unit and the electromagnetic generating module, configured to detect specific parameters of the incident wave signal and the reflected wave signal passing therethrough; and

[0022] The control unit is configured to calculate the electromagnetic wave absorption rate according to the specific parameters, and send an adjustment instruction to the matching unit according to the electromagnetic wave absorption rate.

[0023] According to a second aspect of the present invention, there is provided a heating device, comprising:

[0024] A cylinder body is formed with a take-in and put-out opening;

[0025] A door body, disposed at the access opening, for opening and closing the access opening; and

[0026] According to any of the above-mentioned electromagnetic wave generating systems, at least a part is arranged in the cylinder or reaches into the cylinder to generate electromagnetic waves in the cylinder to heat the object to be processed.

[0027] Optionally, the matching unit is disposed in the barrel; and the heating device further comprises:

[0028] The cover shell is configured to divide the inner space of the cylinder into a heating chamber and an electrical chamber, wherein the object to be processed and the matching unit are respectively arranged in the heating chamber and the electrical chamber.

[0029] Optionally, heat dissipation holes are provided at positions of the cylinder and the cover corresponding to the matching unit.

[0030] Optionally, the detection unit, the control unit and the matching unit are integrated into one circuit board; and

[0031] The cylinder is made of metal and is grounded, and the circuit board is conductively connected to the cylinder.

[0032] Since a fixed-value inductor is connected in series in each parallel branch of the first matching module, the electromagnetic wave generating system of the present invention can more accurately match the load after receiving the adjustment instruction, thereby improving the absorption rate of the load to the electromagnetic wave.

[0033] Furthermore, the electromagnetic wave generating system of the present invention can realize a load combination that is several times the sum of the number of parallel branches of the two matching modules, because two matching modules each including multiple parallel branches are connected in series between the electromagnetic generating module and the radiation component, and one end of the matching module far away from the output end of the electromagnetic generating module is grounded. Compared with the technical solution of adjusting the distance between the radiation unit and the receiving pole through a mechanical electric motor structure in the prior art, it is not only lower in cost, but also more reliable and faster in response speed. Compared with the technical solution of using variable capacitors and variable inductors to adjust the load impedance in the prior art, it is not only lower in cost, but also more reliable and has a wider adjustment range.

[0034] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0036] Figure 1 is a schematic structural diagram of a heating device according to an embodiment of the present invention;

[0037] Figure 2 yes Figure 1 A schematic cross-sectional view of the heating device shown, wherein the electromagnetic generating module and the power supply module are removed;

[0038] Figure 3 yes Figure 2 Schematic enlarged view of region A;

[0039] Figure 4 is a schematic structural diagram of an electrical room according to an embodiment of the present invention;

[0040] Figure 5 yes Figure 4 Schematic enlarged view of region B;

[0041] Figure 6 is a schematic structural diagram of an electrical room according to another embodiment of the present invention;

[0042] Figure 7 yes Figure 6 Schematic enlarged view of region C;

[0043] Figure 8 is a circuit diagram of a matching unit according to an embodiment of the present invention. DETAILED DESCRIPTION

[0044] Figure 1 is a schematic structural diagram of a heating device 100 according to an embodiment of the present invention; Figure 2 yes Figure 1 The schematic cross-sectional view of the heating device 100 is shown, wherein the electromagnetic generating module 161 and the power supply module 162 are removed. Figure 1 and Figure 2 The heating device 100 may include a cylinder 110, a door body 120, and an electromagnetic wave generating system.

[0045] The cylinder 110 can be used to place the objects to be processed, and a take-in and put-out opening can be opened on the front wall or the top wall thereof for taking-in and put-in the objects to be processed.

[0046] The door body 120 can be installed with the cylinder body 110 by appropriate methods, such as slide rail connection, hinge connection, etc., for opening and closing the access opening. In the illustrated embodiment, the heating device 100 also includes a drawer 140 for carrying the objects to be processed, and the front end plate of the drawer 140 is arranged to be fixedly connected to the door body 120, and the two lateral side plates are movably connected to the cylinder body 110 through slide rails.

[0047] In some embodiments, the electromagnetic wave generating system may include an electromagnetic generating module 161 , a power supply module 162 , and a radiation component.

[0048] The power supply module 162 may be configured to be electrically connected to the electromagnetic generating module 161 to provide electrical energy to the electromagnetic generating module 161, thereby causing the electromagnetic generating module 161 to generate an electromagnetic wave signal. The radiation component may include one or more radiation units disposed in the cylinder 110 or reaching into the cylinder 110, and the one or more radiation units are electrically connected to the electromagnetic generating module 161 to generate electromagnetic waves of corresponding frequencies according to the electromagnetic wave signal to heat the object to be processed in the cylinder 110. In some embodiments, the number of radiation units may be one, and the radiation unit is a flat radiation antenna 150.

[0049] The cylinder 110 and the door 120 may be provided with electromagnetic shielding features respectively, so that the door 120 is conductively connected to the cylinder 110 when in a closed state to prevent electromagnetic leakage.

[0050] In some embodiments, the cylinder 110 may be made of metal to serve as a receiving pole to receive electromagnetic waves generated by the radiating antenna 150. In other embodiments, a receiving pole plate may be provided on the top wall of the cylinder 110 to receive electromagnetic waves generated by the radiating antenna 150.

[0051] Figure 3 yes Figure 2 Schematic enlarged view of area A in FIG. Figures 1 to 3 The heating device 100 may further include a signal processing and measurement and control circuit. Specifically, the signal processing and measurement and control circuit may include a detection unit 171 , a control unit 172 , and a matching unit 173 .

[0052] The detection unit 171 may be connected in series between the electromagnetic generating module 161 and the radiation antenna 150 , and may be configured to detect specific parameters of incident wave signals and reflected wave signals passing therethrough in real time.

[0053] The control unit 172 may be configured to obtain the specific parameter from the detection unit 171, and calculate the power of the incident wave and the reflected wave according to the specific parameter. In the present invention, the specific parameter may be a voltage value and / or a current value. The detection unit 171 may also be a power meter to directly measure the power of the incident wave and the reflected wave.

[0054] The control unit 172 may further calculate the electromagnetic wave absorption rate of the object to be processed according to the power of the incident wave and the reflected wave, and compare the electromagnetic wave absorption rate with a preset absorption threshold, and when the electromagnetic wave absorption rate is less than the preset absorption threshold, send an adjustment instruction to the matching unit 173. The preset absorption threshold may be 60-80%, for example 60%, 70%, or 80%.

[0055] The matching unit 173 can be connected in series between the electromagnetic generating module 161 and the radiation antenna 150, and is configured to adjust the load impedance of the electromagnetic generating module 161 according to the adjustment instructions of the control unit 172, so as to improve the matching degree between the output impedance and the load impedance of the electromagnetic generating module 161, so as to place foods with different fixed properties (type, weight, volume, etc.) in the heating chamber 111, or to have more electromagnetic wave energy radiated in the heating chamber 111 during the temperature change process of the foods, thereby improving the heating rate.

[0056] Figure 8 FIG. 1 is a circuit diagram of a matching unit according to an embodiment of the present invention. Figure 8 , the matching unit 173 may include a matching module 1731.

[0057] Specifically, the matching module 1731 may include a plurality of fixed value inductors connected in series between the electromagnetic generating module 161 and the radiating antenna 150, and a plurality of parallel branches. Each parallel branch of the matching module 1731 may include a fixed value capacitor and a switch connected in series. The input ends of the plurality of parallel branches of the matching module 1731 are respectively connected in series between two adjacent inductors and between the end inductor and the radiating antenna 150, and the output ends are all set to be grounded. That is, each parallel branch of the matching module 1731 is connected in series with a fixed value inductor to more accurately match the load after receiving the adjustment instruction, thereby improving the absorption rate of the electromagnetic wave by the object to be processed.

[0058] The matching unit 173 may further include a matching module 1732 connected in series between the electromagnetic generating module 161 and the matching module 1731, and the matching module 1732 includes a plurality of parallel branches. In some embodiments, each parallel branch of the matching module 1732 may include a fixed value capacitor and a switch connected in series.

[0059] The electromagnetic wave generating system of the present invention can realize a load combination that is several times the sum of the number of parallel branches of the two matching modules because two matching modules each including multiple parallel branches are connected in series between the electromagnetic generating module and the radiation component, and one end of the matching module far away from the output end of the electromagnetic generating module is grounded. Compared with the technical solution of adjusting the distance between the radiation unit and the receiving pole by a mechanical electric motor structure in the prior art, it is not only lower in cost, but also more reliable and faster in response speed. Compared with the technical solution of adjusting the load impedance by a variable capacitor and a variable inductor in the prior art, it is not only lower in cost, but also more reliable and has a wider adjustment range.

[0060] The multiple switches of the matching module 1731 and the matching module 1732 can be integrated into an array switch component separately or together to facilitate the on-off control of the switches.

[0061] In some embodiments, the heating device 100 can be used for thawing. The control unit 172 can also be configured to calculate the imaginary change rate of the dielectric constant of the object to be processed according to the power of the incident wave and the reflected wave, and compare the imaginary change rate with a preset change threshold, and send a stop instruction to the electromagnetic generating module 161 when the imaginary change rate of the dielectric constant of the object to be processed is greater than or equal to the preset change threshold, so that the electromagnetic generating module 161 stops working and the thawing program is terminated.

[0062] The preset change threshold can be obtained by testing the imaginary part change rate of the dielectric constant of foods with different fixed properties at -3 to 0°C, so that the food has better shear strength. For example, when the object to be processed is raw beef, the preset change threshold can be set to 2.

[0063] The control unit 172 can also be configured to receive a trigger instruction for starting and stopping the thawing program, and send a corresponding control signal to the electromagnetic generating module 161 according to the trigger instruction, so that the electromagnetic generating module 161 starts or stops working. The control unit 172 is configured to be electrically connected to the power supply module 162 to obtain power from the power supply module 162 and is always in a standby state.

[0064] In some embodiments, the signal processing and measurement and control circuits may be integrated into a circuit board 170 to facilitate installation and maintenance of the signal processing and measurement and control circuits.

[0065] The signal processing and measurement and control circuit can be arranged in the lower rear part of the cylinder 110, which not only allows the cylinder 110 to have a larger storage space, but also prevents the circuit from being damaged due to the excessive height of the food placed in the drawer 140. The rear part of the bottom wall of the drawer 140 can be arranged to be recessed upward to form an expanded space therebelow.

[0066] Figure 4 FIG. 1 is a schematic structural diagram of an electrical room 112 according to an embodiment of the present invention. Figure 2 and Figure 4 The heating device 100 may further include a cover 130 to separate the inner space of the barrel 110 into a heating chamber 111 and an electrical chamber 112. The object to be processed and the circuit board 170 may be respectively arranged in the heating chamber 111 and the electrical chamber 112 to separate the object to be processed and the circuit board 170 to prevent the circuit board 170 from being damaged by accidental touch.

[0067] Specifically, the cover 130 may include a partition 131 that separates the heating chamber 111 from the electrical chamber 112 , and a skirt 132 that is fixedly connected to the inner wall of the barrel 110 .

[0068] In some embodiments, the circuit board 170 may be disposed horizontally. Two lateral side walls of the housing 130 may each be formed with a latch 134 extending upward and inward, and the circuit board 170 may be fixed above the two latches 134 .

[0069] Heat dissipation holes 190 may be respectively opened at positions of the housing 130 and the barrel 110 corresponding to the matching unit 173 , so that the heat generated when the matching unit 173 is working can be discharged through the heat dissipation holes 190 .

[0070] In some embodiments, the radiating antenna 150 may be disposed in the electrical room 112 to prevent the radiating antenna 150 from being dirty or damaged by accidental touch.

[0071] The cover 130 may be made of an insulating material so that the electromagnetic waves generated by the radiating antenna 150 can pass through the cover 130 to heat the object to be processed. Further, the cover 130 may be made of a non-transparent material to reduce the electromagnetic loss of the electromagnetic waves at the cover 130, thereby increasing the heating rate of the object to be processed. The aforementioned non-transparent material is a translucent or opaque material. The non-transparent material may be a PP material, a PC material, or an ABS material, etc.

[0072] The cover 130 can also be used to fix the radiation antenna 150, so as to simplify the assembly process of the heating device 100 and facilitate the positioning and installation of the radiation antenna 150. The radiation antenna 150 can be arranged to be fixedly connected to the partition 131.

[0073] In some embodiments, the radiating antenna 150 may be configured to be fixedly connected to the cover 130 . Figure 5 yes Figure 4 Schematic enlarged view of region B in FIG. Figure 5 The radiation antenna 150 may be formed with a plurality of snap-fit ​​holes 151 , and the cover shell 130 may be correspondingly formed with a plurality of snap-fit ​​buckles 133 , and the plurality of snap-fit ​​buckles 133 are configured to pass through the plurality of snap-fit ​​holes 151 and snap-fit ​​with the radiation antenna 150 , respectively.

[0074] In one embodiment of the present invention, the buckle 133 may be composed of two inverted hooks that are spaced apart and mirror-symmetrical.

[0075] Figure 6 is a schematic structural diagram of an electrical room 112 according to another embodiment of the present invention; Figure 7 yes Figure 6 Schematic enlarged view of region C in FIG. Figure 6 and Figure 7 In another embodiment of the present invention, the buckle 133 may be composed of a fixing portion which is perpendicular to the radiating antenna 150 and hollow in the middle, and an elastic portion which extends from the inner end edge of the fixing portion and is inclined toward the antenna.

[0076] In other embodiments, the radiating antenna 150 may be configured to be fixed to the housing 130 through an electroplating process.

[0077] The cover 130 may further include a plurality of reinforcing ribs, which are configured to connect the partition 131 and the skirt 132 to improve the structural strength of the cover 130 .

[0078] In some embodiments, the radiating antenna 150 can be horizontally arranged at 1 / 3 to 1 / 2 of the height of the cylinder 110, for example 1 / 3, 2 / 5 or 1 / 2, so that the volume of the heating chamber 111 is larger and the electromagnetic waves in the heating chamber 111 have a higher energy density, thereby allowing the object to be processed to be heated quickly.

[0079] See also Figure 4 and Figure 6 The periphery of the radiating antenna 150 may be formed by a smooth curve, so that the distribution of electromagnetic waves in the cylinder 110 is more uniform, thereby improving the temperature uniformity of the object to be processed. The smooth curve refers to a curve whose curve equation is a continuous first-order derivative. In engineering, it means that the periphery of the radiating antenna 150 has no sharp corners.

[0080] In some embodiments, the metal cylinder 110 may be grounded to conduct the electric charge thereon and improve the safety of the heating device 100 .

[0081] The heating device 100 may further include a metal bracket 180. The metal bracket 180 may be configured to connect the circuit board 170 and the barrel 110 to support the circuit board 170 and to conduct the charge on the circuit board 170 through the barrel 110. In some embodiments, the metal bracket 180 may be composed of two parts perpendicular to each other. The metal bracket 180 may be fixedly connected to the housing 130 to facilitate the connection between the housing 130 and the metal bracket 180 and the barrel 110.

[0082] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived based on the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all these other variations or modifications.

Claims

1. An electromagnetic wave generating system for heating an object to be treated, include: An electromagnetic generating module, configured to generate an electromagnetic wave signal; a radiation component, comprising one or more radiation units, arranged to be electrically connected to the electromagnetic generating module to generate electromagnetic waves of corresponding frequencies according to the electromagnetic wave signal; as well as A matching unit is connected in series between the electromagnetic generating module and the radiation component, and is used to adjust the load impedance of the electromagnetic generating module; characterized in that: The electromagnetic wave generating system also includes: A detection unit is connected in series between the matching unit and the electromagnetic generating module and is configured to detect specific parameters of the incident wave signal and the reflected wave signal passing therethrough; and the matching unit comprises: A first matching module, comprising a plurality of fixed-value inductors connected in series between the electromagnetic generating module and the radiation component, and a plurality of parallel branches; and The second matching module is connected in series between the electromagnetic generating module and the first matching module; wherein, Each parallel branch of the first matching module includes a fixed value capacitor and a switch in series; The input ends of the plurality of parallel branches of the first matching module are respectively connected in series between two adjacent inductors and between the end inductor and the radiation component, and the output ends are all grounded; and The second matching module includes a plurality of parallel branches, and each parallel branch of the second matching module includes a fixed-value capacitor and a switch connected in series.

2. The electromagnetic wave generating system according to claim 1, It is characterized in that The plurality of switches of the first matching module are integrated into an array switch assembly.

3. The electromagnetic wave generating system according to claim 1, It is characterized in that The plurality of switches of the second matching module are integrated into an array switch assembly.

4. The electromagnetic wave generating system according to claim 1, It is characterized in that Also includes: The control unit is configured to calculate the electromagnetic wave absorption rate according to the specific parameters, and send an adjustment instruction to the matching unit according to the electromagnetic wave absorption rate.

5. A heating device, include: A cylinder body is formed with a take-in and put-out opening; A door body, arranged at the access opening, used for opening and closing the access opening; as well as According to any one of claims 1 to 3, at least a portion of the electromagnetic wave generating system is disposed in the cylinder or reaches into the cylinder to generate electromagnetic waves in the cylinder to heat the object to be processed.

6. The heating device according to claim 5, It is characterized in that The matching unit is disposed in the cylinder; and the heating device further comprises: The cover shell is configured to divide the inner space of the cylinder into a heating chamber and an electrical chamber, wherein the object to be processed and the matching unit are respectively arranged in the heating chamber and the electrical chamber.

7. The heating device according to claim 6, It is characterized in that Heat dissipation holes are provided at positions of the cylinder and the cover corresponding to the matching unit.

8. The heating device according to claim 6, It is characterized in that The electromagnetic wave generating system is further configured as the electromagnetic wave generating system according to claim 4, wherein the detection unit, the control unit and the matching unit are integrated into a circuit board; and The cylinder is made of metal and is grounded, and the circuit board is conductively connected to the cylinder.

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