Heating device

Abstract

The present invention provides a heating device. The heating device includes a cylinder with a take-in and take-out opening, a door for opening and closing the take-in and take-out opening, and an electromagnetic generating system. At least a part of the electromagnetic generating system is arranged in the cylinder or reaches into the cylinder to generate electromagnetic waves in the cylinder to heat the object to be processed. The heating device also includes a plastic part arranged on the propagation path of the electromagnetic wave. The plastic part is made of non-transparent PP material to reduce the electromagnetic loss of the electromagnetic wave on the plastic part, indirectly increase the proportion of the electromagnetic wave acting on the object to be processed, and then improve the heating rate of the object to be processed.

Description

Technical Field

[0001] The invention relates to kitchen utensils, in particular to an electromagnetic wave heating device. 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. The prior art generally thaws the food by an electromagnetic wave device (such as a microwave oven).

[0003] In order to facilitate the cleaning of the electromagnetic wave device, a tray or other container is usually placed in the heating chamber to hold food. The container's ability to absorb electromagnetic waves will indirectly affect the food's thawing efficiency. If the container has a strong ability to absorb electromagnetic waves, fewer electromagnetic waves will act on the food, and the food's thawing efficiency will be lower; if the container has a weak ability to absorb electromagnetic waves, more electromagnetic waves will act on the food, and the food's thawing efficiency will be higher. Summary of the invention

[0004] An object of the present invention is to provide an electromagnetic wave heating device in view of the above-mentioned defects in the prior art, wherein the plastic parts in the device have a weak ability to absorb electromagnetic waves.

[0005] A further object of the present invention is to improve the assembly efficiency of the heating device.

[0006] Another further object of the present invention is to improve heating efficiency.

[0007] In particular, the present invention provides a heating device, comprising:

[0008] The cylinder body is provided with a taking-in and putting-out opening;

[0009] A door body, disposed at the access opening, for opening and closing the access opening; and

[0010] The electromagnetic generating system, at least a part of which is arranged in the cylinder or reaches into the cylinder, so as to generate electromagnetic waves in the cylinder to heat the object to be processed; characterized in that the heating device also includes:

[0011] The plastic part is arranged on the propagation path of the electromagnetic wave and is made of a non-transparent PP material to reduce the amount of electromagnetic wave absorbed by the plastic part.

[0012] Optionally, the plastic part includes:

[0013] A holding dish is used to hold objects to be processed.

[0014] Optionally, the access opening is opened on the front side wall of the cylinder; and

[0015] The object-carrying dish is a drawer which can slide in the front-back direction and has an upward opening, so as to facilitate taking and placing the objects to be processed.

[0016] Optionally, the electromagnetic generating system comprises:

[0017] An electromagnetic generating module configured to generate an electromagnetic wave signal; and

[0018] The radiation antenna is arranged in the cylinder and is electrically connected to the electromagnetic generating module to generate electromagnetic waves of corresponding frequencies in the cylinder according to the electromagnetic wave signal.

[0019] Optionally, the plastic part includes:

[0020] The antenna cover 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 radiation antenna are respectively arranged in the heating chamber and the electrical chamber.

[0021] Optionally, the radome is disposed at the bottom of the cylinder, and the radiating antenna is horizontally fixed to the lower surface of the radome.

[0022] Optionally, the radiating antenna is arranged at 1 / 3 to 1 / 2 of the height of the cylinder.

[0023] Optionally, the radiating antenna is formed with a plurality of snap-in holes; and

[0024] The antenna cover is correspondingly formed with a plurality of buckles, and the plurality of buckles are configured to pass through the plurality of buckle holes and buckle with the radiating antenna respectively; wherein

[0025] The buckle is composed of two inverted hooks that are spaced apart and mirror-symmetrical; or

[0026] The buckle is composed of a fixing part which is perpendicular to the radiation antenna and hollow in the middle, and an elastic part which extends from the inner end edge of the fixing part and is inclined toward the radiation antenna.

[0027] Optionally, the heating device further comprises:

[0028] The signal processing and measurement and control circuit is configured to be electrically connected to the electromagnetic generating module and is arranged in the electrical room and at the rear side of the radiation antenna.

[0029] Optionally, the signal processing and measurement and control circuit includes:

[0030] A detection unit, connected in series between the electromagnetic generating module and the radiation antenna, and configured to detect specific parameters of the incident wave signal and the reflected wave signal passing through the detection unit;

[0031] a control unit configured to calculate the electromagnetic wave absorption rate of the object to be processed according to the specific parameters; and

[0032] A matching unit is connected in series between the electromagnetic generating module and the radiation antenna, and the matching unit is configured to adjust the load impedance of the electromagnetic generating module according to the electromagnetic wave absorption rate.

[0033] Since the plastic parts in the heating device of the present invention are all made of non-transparent PP material, the absorption of electromagnetic waves by the plastic parts is reduced, which indirectly increases the proportion of electromagnetic waves acting on the object to be processed, thereby improving the heating efficiency of the heating device.

[0034] In particular, the inventor of the present application uses non-transparent materials to manufacture the plastic parts in the cylinder, overcoming the technical prejudice in the prior art. For many years, those skilled in the art have believed that only plastic parts made of transparent materials can reduce the absorption of electromagnetic waves by the container, and the fact that existing microwave ovens all use transparent trays, transparent turntables, etc. to carry the objects to be processed just proves this point.

[0035] Furthermore, the heating device of the present invention covers and fixes the radiating antenna via an antenna cover, which can not only separate the object to be processed and the radiating antenna to prevent the radiating antenna from being dirty or accidentally damaged, but also simplify the assembly process of the heating device and facilitate the positioning and installation of the radiating antenna.

[0036] Furthermore, the present invention sets the antenna cover at 1 / 3 to 1 / 2 of the height of the cylinder, which not only avoids damage to the antenna cover and the radiating antenna due to the user placing the object to be processed too high, but also allows the electromagnetic waves in the heating chamber to have a higher energy density, thereby allowing the object to be processed to be heated quickly.

[0037] Furthermore, the present invention adjusts the load impedance of the electromagnetic generating module through a matching unit to improve the matching degree between the output impedance and the load impedance of the electromagnetic generating module, so that foods with different fixed properties (type, weight, volume, etc.) can be placed in the heating chamber, or more electromagnetic wave energy can be radiated into the heating chamber during the temperature change process of the food.

[0038] 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

[0039] 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:

[0040] Figure 1 is a schematic structural diagram of a heating device according to an embodiment of the present invention;

[0041] 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;

[0042] Figure 3 yes Figure 2 Schematic enlarged view of region A;

[0043] Figure 4 is a schematic structural diagram of an electrical room according to an embodiment of the present invention;

[0044] Figure 5 yes Figure 4 Schematic enlarged view of region B;

[0045] Figure 6 is a schematic structural diagram of an electrical room according to another embodiment of the present invention;

[0046] Figure 7 yes Figure 6 Schematic enlarged view of area C in the figure. DETAILED DESCRIPTION

[0047] 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 , an electromagnetic generating module 161 , a power supply module 162 , and a radiation antenna 150 .

[0048] The cylinder 110 can be used to place the objects to be processed, and its front wall or top wall can be provided with a take-in and put-out opening for taking and putting the objects to be processed. The door 120 can be installed with the cylinder 110 by appropriate methods, such as slide rail connection, hinge connection, etc., for opening and closing the take-in and put-out opening.

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

[0050] The power supply module 162 can 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 antenna 150 can be disposed in the cylinder 110 and electrically connected to the electromagnetic generating module 161 to generate electromagnetic waves of a corresponding frequency according to the electromagnetic wave signal to heat the object to be processed in the cylinder 110.

[0051] In some embodiments, the cylinder 110 may be made of metal to serve as a receiving electrode to receive electromagnetic waves generated by the radiating antenna 150. In other embodiments, a receiving electrode plate may be provided on the side wall of the cylinder 110 opposite to the radiating antenna 150 to receive electromagnetic waves generated by the radiating antenna 150.

[0052] Figure 4 is a schematic structural diagram of an electrical room 112 according to an embodiment of the present invention; Figure 6 FIG. 1 is a schematic structural diagram of an electrical room 112 according to another embodiment of the present invention. 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.

[0053] See also Figure 2 and Figure 4 The heating device 100 may further include an antenna cover 130 to separate the inner space of the cylinder 110 into a heating chamber 111 and an electrical chamber 112. The object to be processed and the radiation antenna 150 may be respectively arranged in the heating chamber 111 and the electrical chamber 112 to separate the object to be processed and the radiation antenna 150 to prevent the radiation antenna 150 from being dirty or accidentally damaged.

[0054] In some embodiments, the radome 130 may be made of insulating plastic so that the electromagnetic waves generated by the radiating antenna 150 can pass through the radome 130 to heat the object to be processed.

[0055] In some embodiments, the antenna cover 130 may be disposed at the bottom of the cylinder 110 to prevent the antenna cover 130 and the radiating antenna 150 from being damaged due to the user placing the object to be processed too high.

[0056] The radiation antenna 150 can be horizontally arranged at 1 / 3 to 1 / 2 of the height of the cylinder 110, such as 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.

[0057] In some embodiments, the object to be processed may be placed directly on the radome 130 .

[0058] In other embodiments, the heating device 100 may further include a container for carrying the objects to be processed. The container may be a tray. When the access opening is provided on the front wall of the cylinder 110, the container may be a plastic drawer 140 with an upward opening. The two lateral side panels of the drawer 140 may be movably connected to the cylinder 110 via a slide rail so that the drawer 140 can slide forward and backward to facilitate the access to the objects to be processed. The front wall of the drawer 140 may be arranged to be fixedly connected to the door body 120.

[0059] In particular, in the present invention, plastic parts such as the antenna cover 130 and the drawer 140 can be made of non-transparent (translucent or opaque) PP material to reduce the electromagnetic loss of electromagnetic waves on the plastic parts, indirectly increase the proportion of electromagnetic waves acting on the object to be processed, and thereby increase the heating rate of the object to be processed.

[0060] In order to further understand the present invention, preferred embodiments of the present invention are described below in conjunction with more specific examples, but the present invention is not limited to these examples.

[0061] Example 1

[0062] The heating device includes a cylinder, a door, a drawer, a radiation antenna, an electromagnetic generating module, and a radome for covering the antenna, wherein the radiation antenna is arranged at 1 / 3 of the height of the cylinder;

[0063] The drawers and antenna covers are both made of PP material produced by ExxonMobil Corporation with a white masterbatch added (the model of the PP material is AP3N, the mixed material is opaque, and is usually used to make drawers in refrigerator freezer compartments).

[0064] Example 2

[0065] The difference from Example 1 is that the drawer and the antenna cover are both made of PP material (model AP3N, translucent) produced by ExxonMobil Corporation.

[0066] Comparative Example 1

[0067] The difference from Example 1 is that the drawer and the antenna cover are both made of PTFE material (model M-139, opaque) produced by Daikin Fluorochemical Co., Ltd.

[0068] Comparative Example 2

[0069] The difference from Example 1 is that the drawer and the antenna cover are both made of transparent PC material (model 2805, transparent) produced by Bayer Co., Ltd.

[0070] Comparative Example 3

[0071] The difference from Example 1 is that the drawer and the antenna cover are both made of transparent PS material (type 165H, transparent) produced by BASF AG.

[0072] Comparative Example 4

[0073] The difference from Example 1 is that the drawer is made of PS material (type 165H, transparent) produced by BASF AG.

[0074] Test description: The same mass of edible vegetable oil was placed in the drawers of each embodiment and each comparative example, and the starting temperature of the edible oil was measured. Then, the electromagnetic generating module was made to generate an electromagnetic wave signal of 40.68 MHz and 100 W for 5 minutes, and then the ending temperature of the edible oil was measured.

[0075] The test results of Examples 1-2 and Comparative Examples 1-4 are shown in Tables 1-6. In order to improve the accuracy of the test, 2 or 3 samples were placed in the heating devices of Examples 1-2 and Comparative Examples 1-4 for testing.

[0076] Table 1

[0077] Test product (PP) Starting temperature (℃) End temperature(℃) Temperature rise(℃) Sample 1 22.3 34.6 12.3 Sample 2 22.1 34.4 12.3 average / / 12.3

[0078] Table 2

[0079] Test product (PP) Starting temperature (℃) End temperature(℃) Temperature rise(℃) Sample 1 22.3 34.6 12.3 Sample 2 22.2 34.4 12.2 Sample 3 22.3 34.6 12.3 average / / 12.27

[0080] Table 3

[0081] Test product (PTFE) Starting temperature (℃) End temperature(℃) Temperature rise(℃) Sample 1 21.8 33.2 11.4 Sample 2 21.9 33.3 11.4 average / / 11.4

[0082] Table 4

[0083] Test product (PC) Starting temperature (℃) End temperature(℃) Temperature rise(℃) Sample 1 22.5 32.1 9.6 Sample 2 22.2 32.3 10.1 Sample 3 23.6 33.1 9.5 average / / 9.73

[0084] Table 5

[0085] Test product (PS) Starting temperature (℃) End temperature(℃) Temperature rise(℃) Sample 1 22 33.9 11.9 Sample 2 22.6 34.8 12.2 average / / 12.05

[0086] Table 6

[0087] Test products (PS+PP) Starting temperature (℃) End temperature(℃) Temperature rise(℃) Sample 1 22.6 34 11.4 Sample 2 23 33.8 10.8 Sample 3 22.6 33.6 11 average / / 11.07

[0088] It can be seen from the test results in Tables 1-4 that, under the same heating time, the temperature rise of edible vegetable oil in the heating device where the drawer and the antenna cover are both made of opaque PP material, the temperature rise of edible vegetable oil in the heating device where the drawer and the antenna cover are both made of translucent PP material, and the temperature rise of edible vegetable oil in the heating device where the drawer and the antenna cover are both made of opaque PTFE material are all much greater than the temperature rise of edible vegetable oil in the heating device where the drawer and the antenna cover are both made of transparent PC material. That is, the absorption capacity of opaque PP material, translucent PP material, and opaque PTFE material for electromagnetic waves is weaker than that of transparent PC material, and the electromagnetic loss of electromagnetic waves on opaque PP material, translucent PP material, and opaque PTFE material is less.

[0089] It can be seen from the test results in Table 1 and Table 5-6 that, under the same heating time, the temperature rise values ​​of edible vegetable oil in the heating device where both the drawer and the antenna cover are made of opaque PP material, the temperature rise values ​​of edible vegetable oil in the heating device where both the drawer and the antenna cover are made of transparent PS material, and the temperature rise values ​​of edible vegetable oil in the heating device where the drawer and the antenna cover are made of transparent PS material and opaque PP material respectively are slightly different. That is, the opaque PP material and the transparent PS material have similar absorption capabilities for electromagnetic waves.

[0090] In addition, during the processing of the drawer and antenna cover of Comparative Example 1, the process of making the drawer and antenna cover was complicated and costly due to the poor injection molding of the opaque PTFE material. After the test of Comparative Examples 3-4, the drawer and antenna cover made of transparent PS material softened significantly. After testing, the softening point of transparent PS material was around 80°C, that is, its heat resistance was poor. After the test of Examples 1-2, the drawer and antenna did not soften visually or tactilely.

[0091] The antenna 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. Specifically, the antenna cover 130 may include a partition 131 that separates the heating chamber 111 and the electrical chamber 112, and a skirt 132 that is fixedly connected to the inner wall of the cylinder 110. The radiation antenna 150 may be arranged to be fixedly connected to the partition 131.

[0092] In some embodiments, the radiating antenna 150 may be configured to be fixedly connected to the radome 130 . Figure 5 yes Figure 4 Schematic enlarged view of region B in FIG. Figure 5 The radiating antenna 150 may be formed with a plurality of snap-fit ​​holes 151 , and the antenna cover 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 radiating antenna 150 , respectively.

[0093] In one embodiment of the present invention, the buckle 133 may be composed of two inverted hooks that are spaced apart and mirror-symmetrical.

[0094] Figure 7 yes Figure 6 Schematic enlarged view of region C in FIG. 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.

[0095] In other embodiments, the radiating antenna 150 may be configured to be fixed to the radome 130 through an electroplating process.

[0096] The radome 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 radome 130 .

[0097] 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 170. Specifically, the signal processing and measurement and control circuit 170 may include a detection unit 171, a control unit 172, and a matching unit 173.

[0098] 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.

[0099] 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.

[0100] 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%.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] The control unit 172 can also be configured to receive user instructions and control the electromagnetic generating module 161 to start working according to the user instructions, wherein the control unit 172 is configured to be electrically connected to the power supply module 162 to obtain electrical energy from the power supply module 162 and remain in a standby state.

[0105] In some embodiments, the signal processing and measurement and control circuit 170 may be integrated into a circuit board and horizontally disposed in the electrical chamber 112 to facilitate electrical connection between the radiating antenna 150 and the matching module.

[0106] Heat dissipation holes 190 may be respectively opened at positions of the antenna cover 130 and the cylinder body 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 .

[0107] In some embodiments, the signal processing and measurement and control circuit 170 may be disposed at the rear side of the radiating antenna 150. The rear portion of the bottom wall of the drawer 140 may be configured to be recessed upward to form an expanded space at its lower portion. The heat dissipation holes 190 may be provided at the rear wall of the antenna cover 130 and the cylinder 110.

[0108] 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 .

[0109] The heating device 100 may further include a metal bracket 180. The metal bracket 180 may be configured to connect the circuit board and the cylinder 110 to support the circuit board and conduct the charge on the circuit board through the cylinder 110. In some embodiments, the metal bracket 180 may be composed of two parts perpendicular to each other.

[0110] In some embodiments, the electromagnetic generating module 161 and the power supply module 162 may be disposed outside the barrel 110. A portion of the metal bracket 180 may be disposed at the rear of the circuit board and extend vertically in the lateral direction, and may be provided with two wiring ports, so that the wiring terminal of the detection unit 171 (or the matching unit 173) extends from one wiring port to be electrically connected to the electromagnetic generating module 161, and the wiring terminal of the control unit 172 extends from the other wiring port to be electrically connected to the electromagnetic generating module 161 and the power supply module 162.

[0111] In some embodiments, the heating device 100 can be disposed in a storage compartment of a refrigerator to facilitate users in thawing food.

[0112] 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. A heating device, comprising: The cylinder body is provided with a taking-in and putting-out opening; A door body, arranged at the access opening, used for opening and closing the access opening; as well as The electromagnetic generating system, at least a part of which is arranged in the cylinder or reaches into the cylinder, so as to generate electromagnetic waves in the cylinder to heat the object to be processed; characterized in that the heating device also includes: The plastic part is arranged on the propagation path of the electromagnetic wave and is made of a non-transparent PP material to reduce the amount of electromagnetic wave absorbed by the plastic part; wherein, The electromagnetic generating system comprises: An electromagnetic generating module configured to generate an electromagnetic wave signal; and a radiation antenna, disposed in the cylinder and electrically connected to the electromagnetic generating module, so as to generate electromagnetic waves of corresponding frequencies in the cylinder according to the electromagnetic wave signal; and The plastic part comprises: The antenna cover is configured to separate the internal space of the cylinder into a heating chamber and an electrical chamber, wherein the object to be processed and the radiation antenna are respectively arranged in the heating chamber and the electrical chamber; wherein the radiation antenna is formed with a plurality of snap-on holes; and The antenna cover is correspondingly formed with a plurality of buckles, and the plurality of buckles are arranged to pass through the plurality of buckle holes and buckle with the radiation antenna respectively; wherein, The buckle is composed of two inverted hooks that are spaced apart and mirror-symmetrical; or The buckle is composed of a fixing part which is perpendicular to the radiation antenna and hollow in the middle, and an elastic part which extends from the inner end edge of the fixing part and is inclined toward the radiation antenna.

2. The heating device according to claim 1, characterized in that The plastic part also includes: A holding dish is used to hold objects to be processed.

3. The heating device according to claim 2, characterized in that: The access opening is opened on the front side wall of the cylinder; and The object-carrying dish is a drawer which can slide in the front-back direction and has an upward opening, so as to facilitate taking and placing the objects to be processed.

4. The heating device according to claim 1, characterized in that The radome is disposed at the bottom of the cylinder, and the radiating antenna is horizontally fixed to the lower surface of the radome; and The radiation antenna is arranged at 1 / 3 to 1 / 2 of the height of the cylinder.

5. The heating device according to claim 1, characterized in that: The radome is arranged at the bottom of the cylinder, and the radiating antenna is horizontally fixed to the lower surface of the radome; and the heating device further comprises: The signal processing and measurement and control circuit is configured to be electrically connected to the electromagnetic generating module and is arranged in the electrical room and at the rear side of the radiation antenna.

6. The heating device according to claim 5, characterized in that: The signal processing and measurement and control circuit comprises: a detection unit connected in series between the electromagnetic generating module and the radiation antenna, and the detection unit is configured to detect specific parameters of the incident wave signal and the reflected wave signal passing through the detection unit; and The control unit is configured to calculate the electromagnetic wave absorption rate of the object to be processed according to the specific parameters.

7. The heating device according to claim 6, characterized in that The signal processing and measurement and control circuit also includes: A matching unit is connected in series between the electromagnetic generating module and the radiation antenna, and the matching unit is configured to adjust the load impedance of the electromagnetic generating module according to the electromagnetic wave absorption rate.

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