Microwave shielding cover body and microwave rice cooker

Abstract

The utility model relates to the technical field of household appliances, and provides a shielding cover body and a microwave rice cooker, and the microwave shielding cover body comprises a shielding cover plate and a non-contact temperature measurement sensor; the shielding cover plate is used for enclosing a shielding cover on the cooking body to form a shielding cavity, and the shielding cover plate is provided with a first through hole; the non-contact temperature measurement sensor is located on the side, away from the shielding cover, of the shielding cover plate and forms a detection view field, and the detection view field is suitable for penetrating through the first through hole. The cross section of the first through hole is circular, the diameter of the first through hole is phi, the distance between the transmitting end of the non-contact temperature measurement sensor and the side, facing the shielding cavity, of the shielding cover plate is H, and the value obtained by dividing the value of phi by H is larger than or equal to 0.6. By optimizing the ratio relation between phi and H, the detection view field cannot be blocked by a non-food structure (such as a shielding cover plate), the detection view field is prevented from detecting the non-food temperature, and the accuracy of food temperature detection is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a microwave shielding cover and a microwave rice cooker. Background Art

[0002] In the related art, a non-contact temperature sensor is embedded in the microwave shielding cover of the microwave rice cooker to detect the temperature of the food in the cooking cavity. The shielding cover plate of the microwave shielding cover needs to have a through hole corresponding to the non-contact temperature sensor, which results in poor temperature detection effect. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the related art. To this end, the present invention provides a microwave shielding cover. By making the inner wall of the first through hole of the shielding cover avoid the detection field of view, the detection field of view is ensured not to be blocked by the shielding cover, thereby increasing the coverage of the detection field of view on the food surface and improving detection accuracy.

[0004] The embodiment of the utility model also provides a microwave rice cooker.

[0005] The microwave rice cooker according to the embodiment of the utility model comprises:

[0006] A shielding cover plate, the shielding cover plate is used to enclose the shielding cover on the cooking body to form a shielding cavity, and the shielding cover plate is provided with a first through hole;

[0007] a non-contact temperature measurement sensor, the non-contact temperature measurement sensor being located on a side of the shielding cover away from the shielding cover, the non-contact temperature measurement sensor forming a detection field of view, the detection field of view being suitable for passing through the first through hole;

[0008] The cross section of the first through hole is circular, the diameter of the first through hole is φ, the distance from the transmitting end of the non-contact temperature measurement sensor to the side of the shielding cover facing the shielding cavity is H, and the value of φ divided by H is greater than or equal to 0.6.

[0009] According to the microwave shielding cover of the embodiment of the present invention, by optimizing the ratio between φ and H, the detection field of the non-contact temperature measurement sensor will not be blocked by non-food structures (such as the shielding cover) before covering the food surface, causing the detection field of view to detect the temperature of non-food, or the detection field of view covering an area through the first through hole is too small, resulting in only a small area of ​​the food surface being detected, thereby avoiding inaccurate food temperature detection.

[0010] According to one embodiment of the present invention, the maximum cross-sectional area of ​​the first through hole is less than or equal to 113 square millimeters, or the cross-section of the first through hole is circular, and the maximum cross-sectional diameter of the first through hole is less than or equal to 12 millimeters.

[0011] According to an embodiment of the present invention, the cross-sectional diameter of the first through hole gradually increases along the extension direction of the detection field of view.

[0012] According to an embodiment of the present invention, the viewing angle of the detection field of view is less than or equal to 150 degrees.

[0013] According to one embodiment of the present invention, the microwave shielding cover further comprises a movable cover plate adapted to enclose the inner pot of the cooking body to form a cooking cavity, wherein the movable cover plate and the inner pot are located in the shielding cavity;

[0014] The movable cover is provided with a second through hole, and the second through hole is suitable for the detection field to pass through.

[0015] According to one embodiment of the present invention, the microwave shielding cover further includes a sealing component, which includes a first sealing component, the first sealing component is sealed and installed in the first through hole and the second through hole, the first sealing component is provided with a first channel, and the detection field of view passes through the first channel.

[0016] According to one embodiment of the present invention, the microwave shielding cover further comprises a plastic inner cover, and the plastic inner cover is provided on a side of the shielding cover plate away from the cooking cavity;

[0017] The non-contact temperature measurement sensor is fixedly mounted on a side of the plastic inner cover facing away from the cooking cavity. The plastic inner cover is provided with a third through hole, and the third through hole is suitable for the detection field to pass through.

[0018] According to one embodiment of the present invention, the sealing component further includes a second sealing member, the second sealing member is sealingly mounted on the third through hole and the first through hole, the second sealing member is provided with a second channel, and the second channel is connected to the first channel;

[0019] The detection field of view passes through the second channel.

[0020] According to one embodiment of the present invention, an optical lens is embedded in the inner wall of at least one of the first sealing member or the second sealing member, and the optical lens is suitable for the detection field to pass through.

[0021] The microwave rice cooker according to the second embodiment of the present invention comprises:

[0022] The microwave shielding cover as described above;

[0023] The cooking body comprises a shielding cover. The microwave shielding cover is suitable for covering the cooking body so that the shielding cover plate of the shielding cover and the shielding cover are combined to form the shielding cavity.

[0024] The beneficial effects of the microwave rice cooker according to the embodiment of the present invention are the same as those of the microwave shielding cover plate in the embodiment of the first aspect of the present invention, and will not be described in detail here.

[0025] According to one embodiment of the present invention, the cooking body further comprises: an inner pot;

[0026] The movable cover plate of the microwave shielding cover body and the inner pot are combined to form the cooking cavity.

[0027] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 This is one of the structural diagrams of the microwave rice cooker provided by the embodiment of the utility model.

[0030] Figure 2 It is a front view of a microwave rice cooker provided by an embodiment of the utility model.

[0031] Figure 3 yes Figure 2 Sectional view along section line AA.

[0032] Figure 4 yes Figure 3 Enlarged view of part B in the middle.

[0033] Figure 5 This is one of the exploded views of the microwave rice cooker provided in the embodiment of the present utility model.

[0034] Figure 6 This is one of the cross-sectional views of the microwave rice cooker provided by the embodiment of the present utility model.

[0035] Figure 7 yes Figure 6 Enlarged view of part C in the middle.

[0036] Figure 8 This is the second sectional view of the microwave rice cooker provided by the embodiment of the present utility model.

[0037] Figure 9 yes Figure 8 Enlarged view of part D in the middle.

[0038] Reference numerals:

[0039] 10. Cooking unit; 11. Shielding cover; 12. Inner pot; 13. Shielding cavity; 14. Cooking cavity;

[0040] 20. Microwave shielding cover; 21. Shielding cover; 211. First through hole; 22. Movable cover; 221. Second through hole; 23. Sealing member; 24. First sealing member; 241. First passage; 25. Second sealing member; 251. Second passage;

[0041] 30. Non-contact temperature sensor; 31. Detection field of view;

[0042] 40. Plastic inner cover; 41. Third through hole;

[0043] 50. Optical lens. DETAILED DESCRIPTION

[0044] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0045] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0046] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0047] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0049] Combine Figures 1 to 4 As shown, according to the microwave shielding cover body 20 of the embodiment of the present invention, it includes a shielding cover plate 21 and a non-contact temperature sensor 30; the shielding cover plate 21 is used to enclose the shielding cover 11 on the cooking body 10 to form a shielding cavity 13, and the shielding cover plate 21 is provided with a first through hole 211; the non-contact temperature sensor 30 is located on the side of the shielding cover plate 21 away from the shielding cover 11, and the non-contact temperature sensor 30 forms a detection field of view 31, and the detection field of view 31 is suitable for passing through the first through hole 211; the cross-section of the first through hole 211 is circular, and the diameter of the first through hole 211 is φ, and the distance from the emitting end of the non-contact temperature sensor 30 to the side of the shielding cover plate 21 facing the shielding cavity 13 is H, and the value of φ divided by H is greater than or equal to 0.6.

[0050] According to the microwave shielding cover 20 of the embodiment of the present invention, the microwaves generated by the microwave generator of the cooking utensil heat the food in the shielding cavity 13. During the heating process, the detection field 31 of the non-contact temperature sensor 30 passes through the first through hole 211 to cover the surface of the food to detect the food temperature.

[0051] It should be noted that in related technologies, microwave rice cookers typically use contact temperature sensors to detect food temperature. These sensors determine whether the water in the food is boiling by identifying the temperature of the water vapor generated during food heating. However, when a microwave rice cooker is used to reheat food, the reheating temperature does not reach a sufficient level to generate sufficient water vapor. As a result, the contact temperature sensor cannot accurately detect the actual food temperature and can only estimate the food temperature based on the heating time and power. However, for different types (with varying thermal conductivities) and sizes of food, this indirect estimation is inaccurate, leading to overheating or underheating of the food, impacting the user experience.

[0052] Based on this, the present application proposes a technical solution for installing a non-contact temperature measurement sensor 30. The non-contact temperature measurement sensor 30 is disposed within the microwave shielding cover 20. The detection field 31 of the non-contact temperature measurement sensor 30 covers the food surface, directly detecting the food temperature. Accordingly, a through hole must be provided in the microwave shielding cover 20 (multiple through holes are required if the structure has multiple layers). However, there is a problem in which the detection field 31 of the non-contact temperature measurement sensor 30 is obscured by the structural layers (such as the shielding cover 21), affecting the detection effect.

[0053] According to the microwave rice cooker of the embodiment of the present invention, the inner wall of the first through hole 211 avoids the detection field of view 31, so that before the detection field of view 31 of the non-contact temperature measurement sensor 30 covers the food surface, it will not be blocked by the non-food structure (such as the shielding cover 21), causing the detection field of view 31 to detect the temperature of the non-food, or the detection field of view 31 covering an area that is too small through the first through hole 211, resulting in only a small area of ​​the food surface being detected, thereby avoiding inaccurate food temperature detection.

[0054] In this embodiment, combined with Figure 7 As shown, the cross-section of the first through hole 211 is circular, the diameter of the first through hole 211 is φ, the distance from the transmitting end of the non-contact temperature sensor 30 to the side of the shielding cover 21 facing the shielding cavity 13 is H, and the value of φ divided by H is greater than or equal to 0.6. By controlling the ratio of diameter φ to distance H, the shielding cover 21 is minimized from blocking the non-contact temperature sensor 30, ensuring the temperature detection effect. In other words, it is ensured that, without the inner wall of the first through hole 211 blocking the detection field of view 31, the minimum field of view angle θ of the detection field of view 31 is greater than or equal to 18 degrees, avoiding the detection range of the detection field of view 31 on the food surface being too small, resulting in a large difference between the collected local temperature and the actual overall average temperature of the food.

[0055] Of course, based on the microwave rice cooker with a more uniform heating effect, the overall temperature of the food in the shielding cavity 13 is more uniform, and the ratio of the diameter φ to the distance H can be adjusted accordingly to form a smaller detection field of view 31, thereby improving the integration of the microwave rice cooker.

[0056] In this embodiment, the shielding cover 11 and the shielding cover plate 21 can be made of metal materials and can be manufactured using cold-rolled plates and epoxy resin powder spraying processes; of course, they can also be made of carbon fiber, metallized ceramics and other materials to achieve microwave shielding effects.

[0057] It can be understood that when the shielding cover 11 and the shielding cover 21 are made of metal material, food can be placed directly in the shielding cavity 13 (of course, a coating that does not react with the steam generated by the heating of the food can also be provided on the surface of the metal material), without the need to provide other supporting structures such as the movable cover 22 and the inner pot 12 described later, thereby improving the flexibility of use of the microwave rice cooker.

[0058] In this embodiment, the non-contact temperature sensor 30 uses a far-infrared temperature sensor, which can measure the temperature without contacting the food, avoiding damage or contamination to the food, and has a fast response speed. It can complete the measurement of the temperature of the target object within a few milliseconds, effectively preventing overheating of the food; of course, radiation temperature measuring instruments, laser thermometers, etc. can also be used.

[0059] According to one embodiment of the present invention, Figures 5 to 7 As shown, the maximum cross-sectional area of ​​the first through hole 211 is less than or equal to 113 square millimeters. Microwaves have a certain amount of energy. If microwaves leak into the surrounding environment, they may have adverse effects on human health or other equipment. The first through hole 211 with a smaller area can effectively reduce the leakage of microwaves, ensure the shielding effect of the shielding cover 11 on microwaves, and reduce the risk of accidental exposure to microwaves by external personnel or equipment.

[0060] In this embodiment, the maximum cross-sectional area of ​​the first through hole 211 is less than or equal to 113 square millimeters. Of course, the area of ​​the maximum cross-sectional area of ​​the corresponding first through hole 211 can be adaptively adjusted based on microwaves of different intensities.

[0061] In this embodiment, the shape of the first through hole 211 is adjusted according to specific needs, such as Figure 7 As shown in the figure, the detection field of view 31 is conical along its extension direction. On the cross section perpendicular to the extension direction, the shape of the first through hole 211 can be set to adapt to the shape of the detection field of view 31 to be circular. Of course, when an optical lens 50 is provided in the first through hole 211 (described in detail later), the first through hole 211 can also be specifically set based on the shape of the optical lens 50. For example, if the optical lens 50 is rectangular, the first through hole 211 is correspondingly set to a rectangle for easy assembly.

[0062] In one embodiment, the first through hole 211 has a circular cross-section. This circular shape of the first through hole 211 affects the propagation pattern and frequency response of microwaves within the shield cavity 13. When the diameter of the circular hole approaches or equals the microwave wavelength, resonance occurs. This resonance typically occurs when the diameter of the circular hole is approximately half or an integer multiple of the microwave wavelength. A circular hole with a corresponding diameter near the resonant frequency increases the transmission or reflection of microwaves of a specific frequency, thereby affecting the shielding effectiveness of the shield cavity 13.

[0063] In this embodiment, the maximum cross-sectional diameter of the first through hole 211 is less than or equal to 12 mm. As mentioned above, controlling the diameter of the first through hole 211 means controlling the area of ​​the first through hole 211. A smaller area can effectively reduce microwave leakage and ensure the shielding cover 11's microwave barrier effect.

[0064] According to one embodiment of the present invention, Figure 6 and Figure 7 As shown, the cross-sectional diameter of the first through-hole 211 gradually increases along the extension direction of the detection field of view 31. That is, along the extension direction, the inner wall cross-section of the first through-hole 211 also gradually increases to match the shape of the detection field of view 31. This ensures that the first through-hole 211 is not obstructed by the detection field of view 31 while also reducing the size of the opening of the first through-hole 211, effectively reducing microwave leakage and ensuring the microwave blocking effect of the shielding cover 11. If the first through-hole 211 is a tapered hole, the diameter φ of the first through-hole 211 in this case refers to the minimum diameter.

[0065] In this embodiment, the inner wall shape of the first through hole 211 is adapted to the conical detection field 31 to be a frustum. Of course, when the shape of the detection field 31 changes, the shape of the first through hole 211 is also adjusted accordingly.

[0066] According to one embodiment of the present invention, Figure 8 and Figure 9 As shown, the field of view angle of the detection field of view 31 is less than or equal to 150 degrees. It is understandable that when the field of view angle of the detection field of view 31 exceeds 150 degrees, while covering the surface of the food, it may also detect portions of the inner wall of the shielding cover 11 other than the food, resulting in inaccurate detection of the food temperature. Furthermore, due to the excessively large field of view angle, when the first through hole 211 on the shielding cover 21 is of a certain size (to ensure microwave shielding), the non-contact temperature sensor 30 needs to be closer to the first through hole 211, that is, closer to the higher temperature shielding cavity 13. Excessively high temperatures affect the service life of the non-contact temperature sensor 30.

[0067] According to one embodiment of the present invention, Figures 1 to 4As shown, the microwave shielding cover 20 also includes a movable cover plate 22, which is adapted to enclose the inner pot 12 of the cooking body 10 to form the cooking cavity 14. The movable cover plate 22 and the inner pot 12 are located within the shielding cavity 13. The inner pot 12 and the movable cover plate 22 restrict the range of movement of food, preventing it from sticking to the inner wall of the shielding cavity 13 during heating. Users can individually replace the inner pot 12 with different types based on different ingredients, effectively increasing the flexibility of the microwave rice cooker.

[0068] In this embodiment, the movable cover 22 is provided with a second through hole 221, which is suitable for the detection field 31 to pass through. The detection field 31 extends along the direction through the first through hole 211 and the second through hole 221 to the cooking cavity 14 and covers the food surface.

[0069] Furthermore, in some embodiments, based on the fact that the coverage area of ​​the detection field of view 31 gradually increases along the extension direction, the diameter of the second through hole 221 is correspondingly greater than the diameter of the first through hole 211 .

[0070] According to one embodiment of the present invention, Figures 1 to 4 As shown, the microwave shielding cover 20 further includes a sealing component 23 , which includes a first sealing component 24 . The first sealing component 24 is sealed and installed in the first through hole 211 and the second through hole 221 . The first sealing component 24 is provided with a first channel 241 , and the detection field of view 31 passes through the first channel 241 .

[0071] In this embodiment, the cooking cavity 14 formed by the inner pot 12 and the movable cover 22 limits the steam generated during the heating process of food, prevents the steam from overflowing into the shielding cavity 13 and contacting the shielding cover 11 or the shielding cover 21, and avoids damage to the shielding cover 11 or the shielding cover 21 (such as changes in the internal structure after being subjected to high-temperature steam, resulting in loss of shielding effect); and by providing a first seal 24 and a sealing installation with the first through hole 211 and the second through hole 221, the first seal 24 is sealed between the movable cover 22 and the shielding cover 21. The first channel 241 of the first seal 24 does not affect the temperature measurement of the non-contact temperature measurement sensor 30, and also prevents steam from entering the space between the shielding cover 21 and the movable cover 22, causing the steam to condense upon encountering the shielding cover 21 with a lower temperature to form liquid that flows back into the cooking cavity 14, causing contamination of the food.

[0072] In this embodiment, a snap-in groove is provided on the outer periphery of the first sealing member 24, and the second through hole 221 is snap-fitted into the snap-in groove for fixation, and the end of the first sealing member 24 along the extension direction abuts against the shielding cover plate 21; of course, the snap-in groove of the first sealing member 24 can also be snap-fitted with the first through hole 211, and one end of the first sealing member 24 can be correspondingly abutted against the movable cover plate 22; in other embodiments, the first sealing member 24 can also be directly connected to the first through hole 211 or the second through hole 221 by an adhesive connection.

[0073] According to one embodiment of the present invention, Figures 1 to 4 As shown, the microwave shielding cover 20 also includes a plastic inner cover 40, which is arranged on the side of the shielding cover 21 facing away from the cooking cavity 14; a non-contact temperature measurement sensor 30 is fixedly installed on the side of the plastic inner cover 40 facing away from the cooking cavity 14, and the plastic inner cover 40 is provided with a third through hole 41, which is suitable for detecting the passage of the field of view 31.

[0074] The non-contact temperature measurement sensor 30 and the shielding cover 21 are isolated by the plastic inner cover 40 , so that the non-contact temperature measurement sensor 30 is kept away from the high temperature environment inside the cooking cavity 14 , thereby increasing the service life.

[0075] In this embodiment, along the extension direction, the microwave shielding cover body 20 of the plastic inner cover 40 is recessed toward the cooking cavity 14 to form an installation position for installing the non-contact temperature measurement sensor 30, which facilitates the pre-installation of the non-contact temperature measurement sensor 30 on the plastic inner cover 40 and improves the assembly efficiency of the microwave shielding cover body 20.

[0076] In this embodiment, the detection field of view 31 sequentially passes through the third through hole 41 , the first through hole 211 , and the first channel 241 to cover the surface of the food in the cooking cavity 14 .

[0077] According to one embodiment of the present invention, Figures 1 to 4 As shown, the sealing component 23 also includes a second sealing member 25, which is sealingly mounted in the third through hole 41 and the first through hole 211. The second sealing member 25 is provided with a second channel 251, which communicates with the first channel 241. The second channel 251 of the second sealing member 25 does not affect the temperature measurement of the non-contact temperature sensor 30, and also prevents steam from entering the space between the shielding cover plate 21 and the plastic inner cover 40, causing damage to components arranged in the space. Furthermore, the provision of the second sealing member 25 ensures that even if the first sealing member 24 fails, only the space between the shielding cover plate 21 and the movable cover plate 22 inside the microwave shielding cover body 20 is subject to steam intrusion, effectively reducing the maintenance and replacement costs of the microwave shielding cover body 20.

[0078] In this embodiment, combined with Figure 4As shown, the plastic inner cover 40 has a convex ring protruding toward the side close to the cooking cavity, and the second sealing member 25 is provided with a groove corresponding to the convex ring. Along the extension direction, one end of the second sealing member 25 abuts the shielding cover 21; of course, the second sealing member 25 can also be provided with a form of being connected to the shielding cover 21 through the convex ring and the groove, and abutting against the plastic inner cover 40; in other embodiments, the second sealing member 25 can also be provided with being directly connected to the third through hole 41 or the first through hole 211 by an adhesive connection.

[0079] In this embodiment, the detection field of view 31 passes through the second channel 251 and the first channel 241 and covers the surface of the food in the cooking cavity 14 .

[0080] Of course, in other embodiments, the first sealing member 24 and the second sealing member 25 can also be set as an integrated structure. Specifically, the sealing component 23 formed by the first sealing member 24 and the second sealing member 25 is integrally embedded in the first through hole 211, and the two ends of the sealing component 23 are respectively sealed to the movable cover plate 22 and the plastic inner cover 40. The setting of a sealing component 23 reduces the assembly process steps of the microwave shielding cover body 20, improves the assembly efficiency, and reduces the contact points between the sealing component 23 and the inner structural layer of the cover plate (including the plastic inner cover 40, the shielding cover plate 21 and the movable cover plate 22), thereby effectively reducing the probability of sealing leakage.

[0081] According to one embodiment of the present invention, Figure 4 As shown, an optical lens 50 is embedded in the inner wall of at least one of the first sealing member 24 or the second sealing member 25 , suitable for detecting the passage of the field of view 31 .

[0082] In this embodiment, taking the optical lens 50 set in the second seal 25 as an example, the steam in the cooking cavity 14 can only flow upward along the first channel 241 to the second channel 251 under the obstruction of the first seal 24, and is blocked by the optical lens 50 in the second channel 251, effectively preventing the steam from contacting the non-contact temperature measurement sensor 30.

[0083] Of course, the optical lens 50 can also be set on the first seal 24. In this case, the first seal 24 isolates the space on the side of the movable cover 22 away from the cooking cavity 14 from the cooking cavity 14, so that the steam in the cooking cavity 14 can only enter the first channel 241. The steam entering the channel is blocked by the optical lens 50, which also prevents the steam from contacting the non-contact temperature measurement sensor 30.

[0084] In this embodiment, the sealing connection can be achieved by plugging. Specifically, a fitting groove can be provided on the inner wall of the first channel 241 or the second channel 251, and the periphery of the optical lens 50 is sealed in the fitting groove. Of course, the sealing connection can also be achieved by adhesive connection.

[0085] According to one embodiment of the present invention, non-contact temperature sensor 30 is an infrared temperature sensor; optical lens 50 is a filter adapted to filter infrared light within a specific frequency band. As previously mentioned, far-infrared temperature sensors can measure temperature without contacting food, thus preventing damage or contamination. Furthermore, they offer a fast response time, capable of measuring the target object's temperature within milliseconds, effectively preventing overheating of food.

[0086] Combine Figures 1 to 4 As shown, the microwave rice cooker according to the embodiment of the second aspect of the present invention includes a microwave shielding cover 20 and a cooking body 10 as described in the above embodiment, the cooking body 10 includes a shielding cover 11, and the microwave shielding cover 20 is suitable for covering the cooking body 10 so that the shielding cover plate 21 of the shielding cover 20 and the shielding cover 11 are enclosed to form a shielding cavity 13.

[0087] The beneficial effects of the microwave rice cooker according to the embodiment of the present invention are the same as those of the microwave shielding cover 20 in the embodiment of the first aspect of the present invention, and will not be described in detail here.

[0088] According to one embodiment of the present invention, Figures 1 to 4 As shown, the cooking body 10 further includes an inner pot 12 ; the movable cover plate 22 of the microwave shielding cover 20 and the inner pot 12 enclose a cooking cavity 14 .

[0089] By providing the inner pot 12 and the movable cover 22, the range of movement of the food is limited, preventing the food from sticking to the inner wall of the shielding cavity 13 during heating. Users can replace different types of inner pots 12 based on different ingredients, effectively improving the flexibility of the microwave rice cooker.

[0090] Finally, it should be noted that the above embodiments are intended only to illustrate the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art will appreciate that various combinations, modifications, or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and are intended to be encompassed by the claims of the present invention.

Claims

1. A microwave shielding cover, characterized in that: include: A shielding cover plate, the shielding cover plate is used to enclose the shielding cover on the cooking body to form a shielding cavity, and the shielding cover plate is provided with a first through hole; a non-contact temperature measurement sensor, the non-contact temperature measurement sensor being located on a side of the shielding cover away from the shielding cover, the non-contact temperature measurement sensor forming a detection field of view, the detection field of view being suitable for passing through the first through hole; The cross section of the first through hole is circular, the diameter of the first through hole is φ, the distance from the transmitting end of the non-contact temperature measurement sensor to the side of the shielding cover facing the shielding cavity is H, and the value of φ divided by H is greater than or equal to 0.

6.

2. The microwave shielding cover according to claim 1, wherein: The maximum cross-sectional area of ​​the first through hole is less than or equal to 113 square millimeters, or the cross-section of the first through hole is circular, and the maximum cross-sectional diameter of the first through hole is less than or equal to 12 millimeters.

3. The microwave shielding cover according to claim 1, wherein: Along the extension direction of the detection field of view, the cross-sectional diameter of the first through hole gradually increases.

4. The microwave shielding cover according to claim 1, wherein: The viewing angle of the detection field of view is less than or equal to 150 degrees.

5. The microwave shielding cover according to any one of claims 1 to 4, characterized in that: The microwave shielding cover further comprises a movable cover plate adapted to enclose the inner pot of the cooking body to form a cooking cavity, wherein the movable cover plate and the inner pot are located in the shielding cavity; The movable cover is provided with a second through hole, and the second through hole is suitable for the detection field to pass through.

6. The microwave shielding cover according to claim 5, wherein: The microwave shielding cover further includes a sealing component, which includes a first sealing component. The first sealing component is sealed and installed in the first through hole and the second through hole. The first sealing component is provided with a first channel, and the detection field of view passes through the first channel.

7. The microwave shielding cover according to claim 6, wherein: The microwave shielding cover further comprises a plastic inner cover, which is arranged on a side of the shielding cover plate away from the cooking cavity; The non-contact temperature measurement sensor is fixedly mounted on a side of the plastic inner cover facing away from the cooking cavity. The plastic inner cover is provided with a third through hole, and the third through hole is suitable for the detection field to pass through.

8. The microwave shielding cover according to claim 7, wherein: The sealing component further includes a second sealing member, the second sealing member is sealingly mounted on the third through hole and the first through hole, the second sealing member is provided with a second channel, and the second channel is connected to the first channel; The detection field of view passes through the second channel.

9. The microwave shielding cover according to claim 8, wherein: An optical lens is embedded in the inner wall of at least one of the first sealing member or the second sealing member, and the optical lens is suitable for the detection field to pass through.

10. A microwave rice cooker, characterized in that: include: The microwave shielding cover according to any one of claims 1 to 9; The cooking body comprises a shielding cover. The microwave shielding cover is suitable for covering the cooking body so that the shielding cover plate of the shielding cover and the shielding cover are combined to form the shielding cavity.

11. The microwave rice cooker according to claim 10, characterized in that: The cooking body further comprises: an inner pot; The movable cover plate of the microwave shielding cover body and the inner pot are combined to form a cooking cavity.

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