Heating assembly and microwave cooking device

Abstract

A heating assembly (100) and a microwave cooking device (1000). The heating assembly (100) is used for the microwave cooking device (1000), and comprises: an electric heating member (10), the electric heating member (10) being suitable for being arranged in a microwave cooking cavity (210) of the microwave cooking device (1000) and being provided with a lead wire (11), and the lead wire (11) being suitable for extending out of the microwave cooking cavity (210) and being configured to be electrically connected to a power cord of the microwave cooking device (1000); and a choke structure (20), the choke structure (20) comprising an outer sleeve (21) and an inner sleeve (22), the outer sleeve (21) and the inner sleeve (22) both being conductors, and the outer sleeve (21) being sleeved outside the inner sleeve (22) at an interval. A wire passage (221) extending in an axial direction is formed in the inner sleeve (22), and the wire passage (221) is used for the wire (11) to pass through.

Description

Heating assembly and microwave cooking apparatus

[0001] Cross-reference to related applications

[0002] The present application claims priority to Guangdong Midea Kitchen Appliance Manufacturing Co., Ltd. on August 16, 2024, entitled "Heating assembly and microwave cooking apparatus", Chinese patent application number "202411134110.7, 202422002145.7". TECHNICAL FIELD

[0003] The present application relates to the technical field of cooking equipment, in particular to a heating assembly and a microwave cooking apparatus. BACKGROUND

[0004] The heating pipe of the microwave oven is arranged in the microwave cooking cavity, and microwave energy will act on the heating pipe and be led out through the wire. In the related technology, the leakage prevention device arranged on the microwave oven has poor effect in preventing leakage, which leads to the problem of large amount of microwave leakage of the microwave oven, affecting the use safety of the microwave oven.

[0005] SUMMARY

[0006] The present application aims to at least partially solve one of the technical problems in the related technology.

[0007] To this end, the present application provides a heating assembly, which has the function of shielding microwaves and effectively reduces the amount of microwave leakage.

[0008] The present application further provides a microwave cooking apparatus.

[0009] The heating assembly according to the present application is used in a microwave cooking apparatus and comprises: an electric heating element adapted to be arranged in a microwave cooking cavity of the microwave cooking apparatus and provided with a wire adapted to extend out of the microwave cooking cavity and electrically connected with a power line of the microwave cooking apparatus; and a choke structure comprising an outer sleeve and an inner sleeve, both of which are conductors, and the outer sleeve is spaced and sleeved on the outer side of the inner sleeve, and the inner sleeve forms a wire passage extending in the axial direction inside, which is used for the wire to pass through.

[0010] Thus, according to the heating assembly of the present application, by arranging the choke structure, the choke structure comprises the outer sleeve and the inner sleeve which are sleeved and matched in the radial direction and spaced, the choke structure is equivalent to a coaxial short circuit, which has the characteristic of coaxial shielding, so that the choke structure plays the role of shielding microwaves, reduces the amount of microwaves led out from the microwave cooking cavity through the electric heating element and the wire, thereby reducing the amount of microwave leakage of the microwave cooking apparatus and improving the use safety of the microwave cooking apparatus.

[0011] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 is a schematic diagram of a microwave cooking device according to an embodiment of the application;

[0013] Fig. 2 is an enlarged view of A in Fig. 1;

[0014] Fig. 3 is a schematic diagram of a microwave cooking device according to an embodiment of the application;

[0015] Fig. 4 is a schematic diagram of a choke structure according to an embodiment of the application;

[0016] Fig. 5 is a sectional view of Fig. 4;

[0017] Fig. 6 is a simulation test diagram of a heating assembly according to an embodiment of the application;

[0018] Fig. 7 is a schematic diagram of a choke structure according to an embodiment of the application;

[0019] Fig. 8 is a sectional view of Fig. 7;

[0020] Fig. 9 is a schematic diagram of a choke structure according to an embodiment of the application;

[0021] Fig. 10 is a sectional view of Fig. 9;

[0022] Fig. 11 is a schematic diagram of a microwave cooking device according to an embodiment of the application;

[0023] Fig. 12 is a schematic diagram of a microwave cooking device according to an embodiment of the application. DETAILED DESCRIPTION

[0024] Embodiments of the application are described in detail below with reference to the attached drawing figures, wherein the same or like reference numerals are used throughout the figures to refer to same or like elements or elements with same or similar function. The embodiments described below are exemplary and are intended to be illustrative of the application and are not to be construed as limiting of the application.

[0025] In the description of the present application, it needs to be understood that the terms "center", "length", "inner", "outer", "axial", "radial" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the features defined as "first", "second" can be explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0026] In the description of the present application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] The heating assembly 100 and the microwave cooking device 1000 according to the embodiments of the present application are described below with reference to FIGS. 1-12.

[0028] In combination with FIGS. 1-3, the heating assembly 100 according to the embodiments of the present application, the heating assembly 100 is used in the microwave cooking device 1000, and the heating assembly 100 comprises: an electric heating piece 10, the electric heating piece 10 is adapted to be arranged in the microwave cooking cavity 210 of the microwave cooking device 1000 and is provided with a wire 11, the wire 11 is adapted to extend out of the microwave cooking cavity 210 and is used for electrically connecting with the power line of the microwave cooking device 1000.

[0029] The electric heating piece 10 is electrically connected with the power line of the microwave cooking device 1000 through the wire 11, when the heating assembly 100 is powered on, the electric heating piece 10 can generate heat and can roast the food materials in the microwave cooking cavity 210, so that the microwave cooking device 1000 has the roasting function, and the functionality of the microwave cooking device 1000 is improved.

[0030] In combination with FIGS. 1-3, the heating assembly 100 further comprises a choke structure 20, the choke structure 20 comprises an outer sleeve 21 and an inner sleeve 22, the outer sleeve 21 and the inner sleeve 22 are both conductors, the outer sleeve 21 is spacedly sleeved on the outer side of the inner sleeve 22, the inner sleeve 22 is formed with a wire passing channel 221 extending in the axial direction inside, and the wire passing channel 221 is used for passing the wire 11.

[0031] In combination with FIGS. 1-3, the choke structure 20 is configured as a conductor, for example, the choke structure 20 is formed as a metal piece, the outer sleeve 21 is sleeved on the radially outer side of the inner sleeve 22 and coaxially arranged, and the outer sleeve 21 and the inner sleeve 22 are spaced apart in the radial direction, the space between the outer sleeve 21 and the inner sleeve 22 is filled with air, in the axial direction, the inner sleeve 22 is arranged inside the outer sleeve 21 as a whole, and the inner sleeve 22 is formed with a wire passing channel 221, the wire 11 of the electric heating element 10 can pass through the wire passing channel 221 to extend from inside the microwave cooking cavity 210 to outside the microwave cooking cavity 210, so as to electrically connect the wire 11 with the power line of the microwave cooking device 1000.

[0032] The "axial direction" and the "radial direction" are direction definitions described with reference to the direction of the choke structure 20.

[0033] The choke structure 20 is equivalent to a coaxial line short-circuit device (also can be understood as a coaxial line shield device), which has a coaxial shielding characteristic, so that the choke structure 20 plays a role of shielding microwaves, reduces the amount of microwaves led out from the microwave cooking cavity 210 through the electric heating element 10 and the wire 11, thereby reducing the microwave leakage amount of the microwave cooking device 1000 and improving the use safety of the microwave cooking device 1000.

[0034] The inner sleeve 22 is equivalent to an inner conductor of the coaxial line short-circuit device, which can reduce the conduction of electric field interference, the outer sleeve 21 is equivalent to an outer conductor of the coaxial line short-circuit device, which can guide the external electric field to the ground to avoid the external electric field interfering with the transmission of signals, the air between the inner sleeve 22 and the outer sleeve 21 is equivalent to a dielectric layer of the coaxial line short-circuit device, which can guide the external electromagnetic field to the ground, and the choke structure 20 can restrain the microwaves entering the choke structure 20 in the choke structure 20 to prevent microwave leakage, i.e., realize the function of shielding microwaves of the choke structure 20.

[0035] Since the electric heating element 10 is arranged in the microwave cooking cavity 210, microwave energy will act on the electric heating element 10 and be led out through the wire 11, in the related art, the shielding effect of the leakage prevention device arranged on the microwave cooking device on microwaves is poor, which causes the microwave cooking device to still have a large amount of microwave leakage, thereby affecting the use safety of the microwave cooking device.

[0036] The present application sets the choke structure 20, the choke structure 20 includes the outer sleeve 21 and the inner sleeve 22 which are sleeved and spaced apart in the radial direction, the choke structure 20 is equivalent to a coaxial line short-circuit device, which has a coaxial shielding characteristic, so that the choke structure 20 plays a role of shielding microwaves, reduces the amount of microwaves led out from the microwave cooking cavity 210 through the electric heating element 10 and the wire 11, thereby reducing the microwave leakage amount of the microwave cooking device 1000 and improving the use safety of the microwave cooking device 1000.

[0037] In combination with FIGS. 4 and 5, in some embodiments of the present application, the length L1 of the inner sleeve 22 in the axial direction is one quarter of the wavelength of the microwaves generated by the microwave cooking apparatus 1000.

[0038] Since the choke structure 20 can be equivalent to a coaxial line short circuit, based on the choke design principle of one quarter of the wavelength of the coaxial line short circuit, by setting the length L1 of the inner sleeve 22 in the axial direction to be one quarter of the wavelength of the microwaves generated by the microwave cooking apparatus 1000, to equivalent one quarter of the wavelength of the transmission line (the transmission line can be understood as the physical length of the coaxial line), when the length of the transmission line is one quarter of the wavelength, the choke structure 20 is away from the end of the electric heating element 10. Short circuit or open circuit, it cannot transmit microwaves, thereby improving the effect of shielding microwaves by the choke structure 20, which is conducive to further reducing the amount of microwaves conducted by the wire 11.

[0039] The electric heating element 10 can be configured as a graphene oven tube. Since the conductivity of the graphene oven tube is higher than that of the ordinary metal tube, the waveguide performance of the graphene oven tube is stronger. In the related art, the leakage wave prevention device cannot meet the scene of applying the graphene oven tube to the microwave cooking apparatus, and the microwave leakage value at the tail end of the graphene oven tube of the microwave cooking apparatus using the conventional leakage wave prevention device is as high as 9.99 mW / cm 2 .

[0040] Referring to FIG. 6, it can be seen from the simulation analysis that the microwave electric field is suppressed between the inner sleeve 22 and the outer sleeve 21 during use of the heating assembly 100, that is, the choke structure 20 of the present application has good microwave shielding function.

[0041] When the electric heating element 10 is configured as a graphene oven tube, the microwave leakage value at the tail end of the graphene oven tube (i.e. one end of the wire 11 extending out) is 0.36 mW / cm 2 , which is much smaller than the national required microwave leakage safety value, effectively improving the use safety of the microwave cooking apparatus 1000.

[0042] In combination with FIGS. 4 and 5, in some embodiments of the present application, in the axial direction, the length L1 of the inner sleeve 22 and the length L2 of the outer sleeve 21 satisfy the relationship: 7 / 10≤L1 / L2≤5 / 6.

[0043] The wavelength of the microwaves generated by the microwave cooking apparatus 1000 is usually 122 mm-126 mm, and the length L1 of the inner sleeve 22 can be 25 mm-35 mm, so that the length of the inner sleeve 22 can be one quarter of the wavelength of the microwaves generated by the microwave cooking apparatus 1000, which is conducive to ensuring the shielding effect of the choke structure 20.

[0044] The length L2 of the outer sleeve 21 can be 30mm-50mm, so as to place the inner sleeve 22 entirely in the outer sleeve 21, and ensure that the choke structure 20 can be equivalent to a coaxial short circuit.

[0045] The length L1 of the inner sleeve 22 and the length L2 of the outer sleeve 21 can be adjusted according to the microwave wavelength generated by different microwave cooking equipment 1000, which is not specifically limited here, as long as the effect of shielding microwaves by the choke structure 20 is ensured.

[0046] In combination with FIGS. 4 and 5, the radius Ri of the inner sleeve 22 and the radius Ro of the outer sleeve 21 satisfy the relationship: 1.5*R1≤R0≤3*R1, by making the radius Ro of the outer sleeve 21≥1.5*R1, so as to arrange the inner sleeve 22 in the outer sleeve 21, while ensuring that the medium layer (i.e. the air filled between the inner sleeve 22 and the outer sleeve 21) has a suitable thickness, by making the radius Ro of the outer sleeve 21≤3*R1, which is conducive to preventing excessive leakage of microwaves due to the large aperture of the outer sleeve 21.

[0047] The inner sleeve 22 and the outer sleeve 21 can individually satisfy the relationship 7 / 10≤L1 / L2≤5 / 6, or the inner sleeve 22 and the outer sleeve 21 can individually satisfy the relationship 1.5R1≤R0≤3R1, or the inner sleeve 22 and the outer sleeve 21 can simultaneously satisfy the relationship 7 / 10≤L1 / L2≤5 / 6 and 1.5R1≤R0≤3R1, and the specific arrangement of the inner sleeve 22 and the outer sleeve 21 can be determined according to actual production requirements, which is not specifically limited here.

[0048] In combination with FIGS. 1 and 2, the outer peripheral wall of the outer sleeve 21 is formed with a mounting flange 23, and the outer sleeve 21 and the inner sleeve 22 are connected by a connecting piece 24, and the connecting piece 24 and the mounting flange 23 are arranged in radial opposition, or the connecting piece 24 and the mounting flange 23 are arranged in axial misalignment.

[0049] The connecting piece 24 can completely separate the outer sleeve 21 and the inner sleeve 22 in the radial direction, and the inner sleeve 22 and the outer sleeve 21 can be connected in the radial direction by the connecting piece 24, and since the outer peripheral wall of the outer sleeve 21 is formed with the mounting flange 23, the inner sleeve 22 and the outer sleeve 21 are connected, so as to simultaneously mount the inner sleeve 22 and the outer sleeve 21 on the microwave cooking equipment 1000 through the mounting flange 23, which is conducive to improving the assembly convenience of the choke structure 20.

[0050] In combination with FIGS. 7-10, the connecting piece 24 can be arranged opposite the mounting flange 23 in the radial direction, so as to facilitate positioning and installation of the connecting piece 24, and facilitate improvement of assembly convenience of the choke structure 20; in combination with FIGS. 4 and 5, in the axial direction, the connecting piece 24 can be arranged opposite the mounting flange 23, so as to facilitate reduction of assembly precision requirement of the choke structure 20, and thus facilitate improvement of assembly efficiency of the choke structure 20.

[0051] The relative arrangement position between the connecting piece 24 and the mounting flange 23 can be determined according to actual production requirement, which is not specifically limited here.

[0052] In combination with FIGS. 4 and 5, the connecting piece 24 is located at one axial end of the inner sleeve 22, the mounting flange 23 is located at one axial end of the outer sleeve 21, and the mounting flange 23 is arranged opposite the connecting piece 24 in the axial direction.

[0053] The mounting flange 23 is arranged at one end of the outer sleeve 21 relatively close to the cavity wall 220 of the microwave cooking cavity 210, so as to facilitate connection of the mounting flange 23 with the microwave cooking cavity 210, the connecting piece 24 is arranged in the outer sleeve 21, and the connecting piece 24 is arranged opposite the mounting flange 23 in the axial direction, the connecting piece 24 extends in the radial direction towards the center axis of the outer sleeve 21, the inner sleeve 22 is connected to the side of the connecting piece 24 away from the outer sleeve 21, and the inner sleeve 22 is coaxially arranged with the outer sleeve 21, and the inner sleeve 22 and the outer sleeve 21 can be filled with air, and the choke structure 20 can be equivalent to a coaxial short circuit, so that the choke structure 20 can play a shielding function for microwaves.

[0054] The mounting flange 23, the connecting piece 24, the outer sleeve 21 and the inner sleeve 22 are integrated, which facilitates simplification of assembly process of the heating assembly 100, and improvement of assembly convenience and efficiency of the heating assembly 100.

[0055] In combination with FIGS. 7 and 8, the mounting flange 23 is located at one axial end of the outer sleeve 21, and the mounting flange 23 is arranged opposite the connecting piece 24 in the radial direction.

[0056] The mounting flange 23 is arranged at one end of the outer sleeve 21 close to the cavity wall 220 of the microwave cooking cavity 210 in the axial direction, so that the mounting flange 23 is connected to the cavity wall 220 of the microwave cooking cavity 210, the connecting piece 24 is arranged on the radially inner side of the outer sleeve 21 and is arranged opposite the mounting flange 23 in the radial direction, the connecting piece 24 is positioned and mounted, and the connecting piece 24 extends in the radial direction towards the center axis of the outer sleeve 21, the inner sleeve 22 is connected to the side of the connecting piece 24 away from the outer sleeve 21, and the inner sleeve 22 is coaxially arranged with the outer sleeve 21, and air can be filled between the inner sleeve 22 and the outer sleeve 21, the choke structure 20 can be equivalent to a coaxial short circuit, so that the choke structure 20 can shield microwaves, and this structure is suitable for the structure of the heating assembly 100 without the following protective member 30.

[0057] In combination with FIGS. 9 and 10, the mounting flange 23 is arranged between the two axial ends of the outer sleeve 21, and the mounting flange 23 is arranged opposite the connecting piece 24 in the radial direction.

[0058] In the axial direction, the mounting flange 23 is arranged between the two ends of the outer sleeve 21, and the mounting flange 23 is arranged close to one end of the outer sleeve 21 close to the cavity wall 220 of the microwave cooking cavity 210, so that the mounting flange 23 is mounted on the cavity wall 220 of the microwave cooking cavity 210, the connecting piece 24 is arranged in the outer sleeve 21, and the connecting piece 24 is arranged opposite the mounting flange 23 in the radial direction, and the connecting piece 24 extends in the radial direction towards the center axis of the outer sleeve 21, the inner sleeve 22 is connected to the side of the connecting piece 24 away from the outer sleeve 21, and the inner sleeve 22 is coaxially arranged with the outer sleeve 21, and air can be filled between the inner sleeve 22 and the outer sleeve 21, the choke structure 20 can be equivalent to a coaxial short circuit, so that the choke structure 20 can shield microwaves.

[0059] The portion of the outer sleeve 21 on the side of the mounting flange 23 away from the inner sleeve 22, the mounting flange 23, the connecting piece 24, and the inner sleeve 22 are formed as one piece, and the portion of the outer sleeve 21 on the side of the mounting flange 23 close to the inner sleeve 22 is separately formed and mounted on the mounting flange 23, which is beneficial to improve the assembly convenience of the choke structure 20 and facilitate the processing efficiency of the choke structure 20.

[0060] The outer sleeve 21 as a whole, the mounting flange 23, the connecting piece 24, and the inner sleeve 22 can be formed as one piece, which is beneficial to simplify the assembly process of the heating assembly 100 and improve the assembly convenience and efficiency of the heating assembly 100.

[0061] In combination with FIGS. 1-3, the electric heating element 10 is spaced apart from the choke structure 20, and the heating assembly 100 further comprises a protective element 30 which is fitted between the electric heating element 10 and the choke structure 20 and wraps around the portion of the wire 11 between the electric heating element 10 and the choke structure 20.

[0062] The protective element 30 can be mounted at the tail end of the electric heating element 10 (i.e. the end of the electric heating element 10 from which the wire 11 extends), the wire 11 can extend out of the protective element 30 and into the choke structure 20, the protective element 30 protects the wire 11, which is conducive to improving the stability of the electrical connection of the electric heating element 10, and the protective element 30 can also block the heat generated by the electric heating element 10, thereby reducing the impact of the heat generated by the electric heating element 10 on other components around the electric heating element 10.

[0063] The end of the protective element 30 away from the electric heating element 10 can be fitted with the choke structure 20 (for example, the end of the protective element 30 away from the electric heating element 10 can be inserted and fitted with the choke structure 20), so that the wire 11 extends into the choke structure 20 from the protective element 30, which is conducive to improving the assembly convenience of the wire 11 and the choke structure 20.

[0064] In some embodiments of the present application, the protective element 30 is a ceramic element, the ceramic element has a small coefficient of thermal expansion, which is not prone to deformation under high temperature working conditions, which is conducive to ensuring the fitting stability of the protective element 30 with the choke structure 20 and the electric heating element 10, and the ceramic element has a low thermal conductivity, and configuring the protective element 30 as a ceramic element can make the protective element 30 have good heat insulation performance, thereby being conducive to improving the effect of the protective element 30 blocking the heat generated by the electric heating element 10, and being conducive to further reducing the impact of the heat generated by the electric heating element 10 on the components around the electric heating element 10.

[0065] In combination with FIGS. 1-5, 9 and 10, the outer sleeve 21 has a first end 211 and a second end 212 at the two axial ends thereof, and the inner sleeve 22 is spaced apart between the first end 211 and the second end 212, so that the inner sleeve 22 has an axial end which is spaced apart from the first end 211 to define a mounting groove 201, and the protective element 30 is inserted and fitted in the mounting groove 201.

[0066] In combination with FIGS. 4 and 5 and FIGS. 9 and 10, one end of the outer sleeve 21 arranged close to the electric heating element 10 in the axial direction is defined as a first end 211 of the outer sleeve 21, and the other end of the outer sleeve 21 away from the electric heating element 10 in the axial direction is defined as a second end 212 of the outer sleeve 21. The inner sleeve 22 is arranged away from the first end 211 in the axial direction, so that the one end of the inner sleeve 22 close to the electric heating element 10 in the axial direction is defined between the first end 211 and the one end of the inner sleeve 22 close to the electric heating element 10 in the axial direction. In combination with FIGS. 1 to 3, the protective element 30 can be inserted into the installation slot 201, so that the protective element 30 is positioned and matched with the installation slot 201, thereby facilitating the lead wire 11 to extend into the wire passing channel 221 and pass out of the wire passing channel 221.

[0067] In combination with FIGS. 1 to 3 and FIGS. 11 and 12, the cooking device according to the embodiments of the present application includes the shell 200 and the heating assembly 100 described above. The shell 200 defines a microwave cooking cavity 210. The electric heating element 10 is arranged in the microwave cooking cavity 210. The cavity wall 220 of the microwave cooking cavity 210 is provided with an installation hole 2201. The choke structure 20 is installed at the installation hole 2201. The lead wire 11 extends out of the microwave cooking cavity 210 through the wire passing channel 221 and is electrically connected with the power line.

[0068] The shell 200 defines a microwave cooking cavity 210. The electric heating element 10 is installed on the cavity wall 220 of the microwave cooking cavity 210. The cavity wall 220 of the microwave cooking cavity 210 is provided with an installation hole 2201 penetratingly arranged therein. The lead wire 11 of the electric heating element 10 can extend out of the microwave cooking cavity 210 through the installation hole 2201 and be electrically connected with the power line.

[0069] It can be understood that the entire choke structure 20 is arranged in the microwave cooking cavity 210, or the entire choke structure 20 is arranged outside the microwave cooking cavity 210, or a part of the choke structure 20 is arranged in the microwave cooking cavity 210 and a part of the choke structure 20 is arranged outside the microwave cooking cavity 210. For example, the choke structure 20 is arranged to penetrate the installation hole 2201 from the microwave cooking cavity 210 and extend to the outside of the microwave cooking cavity 210 through the installation hole 2201.

[0070] For example, the outer sleeve 21 can be arranged opposite to the installation hole 2201. The outer sleeve 21 and the inner sleeve 22 can extend out of the microwave cooking cavity 210 through the installation hole 2201, so as to reduce the space of the microwave cooking cavity 210 occupied by the choke structure 20. The lead wire 11 passes through the wire passing channel 221 and is electrically connected with the power line. The choke structure 20 can shield microwaves, so as to reduce the possibility of the lead wire 11 leading out microwaves and improve the use safety of the microwave cooking device 1000.

[0071] Or, when the space of the microwave cooking cavity 210 is large enough, the choke structure 20 can be arranged in the microwave cooking cavity 210, that is, the outer sleeve 21 and the inner sleeve 22 are arranged in the microwave cooking cavity 210, and the arrangement position of the choke structure 20 relative to the microwave cooking cavity 210 can be determined according to actual production requirements, which is not limited here as long as the shielding effect of the choke structure 20 on microwaves is ensured.

[0072] According to the microwave cooking device 1000 of the present application, by arranging the choke structure 20, the choke structure 20 includes the outer sleeve 21 and the inner sleeve 22 arranged in a sleeved and spaced manner in the radial direction, and the choke structure 20 is equivalent to a coaxial short circuit device, which has a coaxial shielding characteristic, so that the choke structure 20 plays a shielding role on microwaves, reduces the amount of microwaves led out of the microwave cooking cavity 210 by the electric heating element 10 and the wire 11, thereby reducing the microwave leakage amount of the microwave cooking device 1000 and improving the use safety of the microwave cooking device 1000.

[0073] In some embodiments of the present application, the outer peripheral wall of the outer sleeve 21 is formed with a mounting flange 23, a connecting piece 24 is connected between the outer sleeve 21 and the inner sleeve 22, the connecting piece 24 is arranged in radial opposition with the mounting flange 23, or the connecting piece 24 is arranged in axial misalignment with the mounting flange 23; the mounting flange 23 is fixedly connected to the cavity wall 220 of the microwave cooking cavity 210, and the mounting flange 23 is in abutting cooperation with the cavity wall 220 of the microwave cooking cavity 210, so that the choke structure 20 can be grounded through the cavity wall 220 of the microwave cooking cavity 210, which is conducive to improving the leakage prevention effect of the choke structure 20.

[0074] The mounting flange 23 can be fixedly connected to the inner surface or the outer surface of the microwave cooking cavity 210, and the arrangement position of the mounting flange 23 can be determined according to actual production requirements, which is not limited here as long as the mounting flange 23 can be in abutting cooperation with the cavity wall 220 of the microwave cooking cavity 210.

[0075] In combination with FIGS. 1 and 2, in some embodiments of the present application, a steam generating device (not shown) can be arranged in the microwave cooking device 1000, so that the microwave cooking device 1000 has a steam function. At this time, a sealing piece 40 can be arranged in the mounting groove 201, the protective piece 30 can be in plug-in cooperation with the sealing piece 40, and the wire 11 can pass through the sealing piece 40 and extend into the wire passing channel 221. The wire 11 passes through the wire passing channel 221 and is electrically connected to the power line. The sealing piece 40 can seal the gap between the wire passing channel 221 and the wire 11 at the end of the wire passing channel 221 to prevent steam from leaking through the wire passing channel 221, which is conducive to improving the effect of cooking food materials with steam in the microwave cooking device 1000.

[0076] The sealing piece 40 can be configured as a silica gel plug.

[0077] In the description of the application, reference has been made to descriptive terms such as "one embodiment", "some embodiments", "an embodiment", "example", "specific example" or "some examples" etc. It is emphasized that each of these terms refers to a specific feature, structure, material or characteristic described in connection with a particular embodiment or example. The descriptive terms are not necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0078] Although embodiments of this application have been shown and described, it is to be understood that various modifications, substitutions, combinations, and variations can be made therein without departing from the spirit and scope of the application. The application is not to be limited by the details given herein, but can be implemented with various alternate, equivalent, or equivalent arrangements while still coming within the scope of the application.

Claims

1. A heating assembly, wherein, A heating assembly for a microwave cooking device, comprising: an electric heating element adapted to be arranged in a microwave cooking cavity of the microwave cooking device and provided with a wire adapted to extend out of the microwave cooking cavity and to be electrically connected with a power cord of the microwave cooking device; a choke structure comprising an outer sleeve and an inner sleeve, both of which are conductors, and the outer sleeve is spacedly sleeved outside the inner sleeve, and the inner sleeve is formed with a wire passing channel extending in an axial direction, and the wire passing channel is used for the wire to pass through.

2. The heating assembly of claim 1, wherein, The length L1 of the inner sleeve in the axial direction is one quarter of the wavelength of the microwave generated by the microwave cooking device.

3. The heating assembly according to claim 1 or 2, wherein, in the axial direction, the length L1 of the inner sleeve and the length L2 of the outer sleeve satisfy the relationship: 7 / 10≤L1 / L2≤5 / 6; and / or, the radius Ri of the inner sleeve and the radius Ro of the outer sleeve satisfy the relationship: 1.5*Ri≤Ro≤3*Ri.

4. The heating assembly of any one of claims 1-3, wherein, an outer peripheral wall of the outer sleeve is formed with a mounting flange, a connecting piece is connected between the outer sleeve and the inner sleeve, and the connecting piece is arranged in radial opposition to the mounting flange, or the connecting piece is arranged axially offset to the mounting flange.

5. The heating assembly of claim 4, wherein, the connecting piece is located at one axial end of the inner sleeve, the mounting flange is located at one axial end of the outer sleeve and is arranged axially offset to the connecting piece, and the mounting flange, the connecting piece, the outer sleeve and the inner sleeve are an integral piece; or, the mounting flange is located at one axial end of the outer sleeve and is arranged in radial opposition to the connecting piece, and the mounting flange, the connecting piece and the inner sleeve are an integral piece; or, the mounting flange is spacedly arranged between the two axial ends of the outer sleeve and is arranged in radial opposition to the connecting piece, and a portion of the outer sleeve located on a side of the mounting flange away from the inner sleeve, the mounting flange, the connecting piece and the inner sleeve are an integral piece.

6. The heating assembly of any one of claims 1-5, wherein, The electric heating element and the choke structure are spacedly arranged, and the heating assembly further comprises: a protective piece fitted between the electric heating element and the choke structure and wrapping a portion of the wire between the electric heating element and the choke structure.

7. The heating assembly of claim 6, wherein, The protective piece is a ceramic piece.

8. The heating assembly of claim 6 or 7, wherein, The two axial ends of the outer sleeve are a first end and a second end respectively, and one axial end of the inner sleeve is spacedly arranged between the first end and the second end, so as to define a mounting groove between the one axial end of the inner sleeve and the first end, and the protective piece is inserted into the mounting groove.

9. A microwave cooking apparatus wherein, A microwave cooking device comprising a housing defining a microwave cooking cavity, and the heating assembly according to any one of claims 1-8, wherein the electric heating element is arranged in the microwave cooking cavity, a mounting hole is formed in a cavity wall of the microwave cooking cavity, the choke structure is mounted at the mounting hole, and the wire extends out of the microwave cooking cavity through the wire passing channel and is electrically connected with a power cord.

10. The microwave cooking apparatus according to claim 9, wherein, The heating assembly is the heating assembly according to claim 4 or 5, and the mounting flange is fixedly connected to the inner surface or the outer surface of the cavity wall of the microwave cooking cavity.

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