CN221058462U - Microwave antenna and cooking equipment - Google Patents

Abstract

The utility model relates to the technical field of household appliances and discloses a microwave antenna and cooking equipment. The microwave antenna comprises an antenna shaft and an antenna blade, wherein the antenna blade is connected to the antenna shaft, and a microwave opening is formed in the antenna blade. The antenna blade of this structure can evenly radiate each corner of cooking cavity with the microwave in the cooking cavity, makes the microwave more even distribution in the cooking cavity, and food in the cooking cavity is heated by even, and food each position is all heated to the required time of predetermineeing the temperature less, has improved cooking efficiency, has promoted user's use experience. According to the cooking equipment provided by the utility model, the microwave antenna can improve the uniformity of microwave distribution in the cooking cavity, so that food in the cooking cavity is uniformly heated, the cooking efficiency is higher, and the user experience is better.

Description

Microwave antenna and cooking equipment

Technical Field

The utility model relates to the technical field of household appliances, in particular to a microwave antenna and cooking equipment.

Background

Along with the continuous improvement of the life quality of people, kitchen appliances are more and more abundant, and microwave ovens, steam boxes and the like are all gradually becoming kitchen electric products necessary for family life. The kitchen electrical products have single functions, each product occupies a certain kitchen space, and the independent purchase cost is high. In order to effectively utilize kitchen space and reduce purchase cost, a steaming and baking micro-integrated machine integrating functions of a steaming box, a microwave oven and an oven is currently proposed. The steaming and baking integrated machine is a kitchen appliance which can steam food and bake food. The working principle is as follows: 1) When food is steamed, the working principle and the structure of the steaming and baking micro-integrated machine are the same as those of a steaming box, namely, an independent steam generating device is adopted to generate steam and then the steam is conveyed into the machine to steam the food, and the cooking mode solves the technical problems that the traditional steamer is low in temperature, nonuniform in heating, difficult to control in weather, multiple in condensed water affect the taste of the food, easy to cross taste, small in capacity and the like, and the steaming function of the steaming and baking micro-integrated machine can be used for steaming the food more quickly and conveniently, and intelligent temperature control can be performed; 2) When the food is baked, the heating principle of the steaming and baking integrated machine is the same as that of the oven, namely, the food is baked by generating heat through the heating pipe.

The microwave antenna on the steaming and baking micro-integrated machine in the prior art has the defects of low heating efficiency and uneven microwave field distribution, so that food is heated slowly and unevenly easily, and the quality requirements of users on the food cannot be met.

Therefore, there is a need to propose a cooking apparatus to solve the above-mentioned problems.

Disclosure of utility model

Based on the above, the utility model aims to provide a microwave antenna and cooking equipment, which have higher heating efficiency and uniform microwave field distribution and can improve the cooking efficiency of food.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

The utility model provides a microwave antenna, comprising:

an antenna shaft;

and the antenna blade is connected to the antenna shaft and is provided with a microwave opening.

As a preferable scheme of the microwave antenna provided by the utility model, the shape of the microwave opening is polygonal or circular.

As a preferable scheme of the microwave antenna provided by the utility model, the number of the antenna blades is at least two, at least two antenna blades are distributed at intervals along the circumferential direction of the antenna shaft, and at least one antenna blade is provided with the microwave opening.

As a preferable scheme of the microwave antenna provided by the utility model, a blade gap exists between two adjacent antenna blades.

As a preferable scheme of the microwave antenna provided by the utility model, the outline of the blade gap comprises a first straight line and a second straight line which are directly connected and are arranged in an included angle; or alternatively

The profile of the blade gap comprises a first straight line, a second straight line and a connecting section for connecting the first straight line and the second straight line, and the connecting section comprises a straight line section and/or an arc section.

As an optimal scheme of the microwave antenna provided by the utility model, a sector connecting part is arranged between two adjacent antenna blades, and the radii of the sector connecting parts are not all equal.

As a preferable scheme of the microwave antenna provided by the utility model, the antenna blade is in a fan-shaped structure.

As a preferable scheme of the microwave antenna provided by the utility model, when the number of the antenna blades is multiple, the central angles of the antenna blades are not all equal.

As a preferred solution of the microwave antenna provided by the utility model, the antenna shaft is a stepped shaft, the small end of the antenna shaft is connected with the antenna blade, the radius of the large end of the antenna shaft is R ₁, the height of the large end of the antenna shaft is H ₁, the radius of the small end of the antenna shaft is R ₂, and the height of the small end of the antenna shaft is H ₂, wherein:

11.5mm≤H₁≤16mm,15mm≤R₁≤17.5mm；

8mm≤H₂≤10mm,7mm≤R₂≤9mm。

The present utility model also provides a cooking apparatus comprising:

The top wall of the inner cavity shell is provided with a coupling port;

The magnetron is arranged on the outer side of the top wall and is communicated with the coupling port through the waveguide;

The stirring motor is arranged on the waveguide;

As described above, the antenna blade of the microwave antenna is located in the inner cavity shell, and the antenna shaft of the microwave antenna passes through the coupling port and is connected with the output end of the stirring motor.

As a preferable scheme of the cooking equipment provided by the utility model, the top wall is provided with the accommodating groove around the coupling opening, the opening of the accommodating groove is covered with glass ceramics, and the antenna blade is positioned between the accommodating groove and the glass ceramics.

As a preferable scheme of the cooking equipment provided by the utility model, the coupling opening is of a circular structure, and the diameter of the coupling opening is 28-32 mm; and/or

The distance between the circle center of the coupling port and the front side wall of the inner cavity shell is 195-215 mm; and/or

The distance between the center of the coupling opening and the rear side wall of the inner cavity shell is 170-190 mm.

The beneficial effects of the utility model are as follows:

The utility model provides a microwave antenna, which comprises an antenna shaft and an antenna blade, wherein the antenna blade is connected to the antenna shaft, and a microwave opening is arranged on the antenna blade. The antenna blade of this structure can evenly radiate each corner of cooking cavity with the microwave in the cooking cavity, makes the microwave more even distribution in the cooking cavity, and food in the cooking cavity is heated by even, and food each position is all heated to the required time of predetermineeing the temperature less, has improved cooking efficiency, has promoted user's use experience.

According to the cooking equipment provided by the utility model, the microwave antenna can improve the uniformity of microwave distribution in the cooking cavity, so that food in the cooking cavity is uniformly heated, the cooking efficiency is higher, and the user experience is better.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the description of the embodiments of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the contents of the embodiments of the present utility model and these drawings without inventive effort for those skilled in the art.

Fig. 1 is a schematic structural view of a cooking apparatus according to an embodiment of the present utility model at one view angle;

Fig. 2 is a schematic cross-sectional view of a cooking apparatus according to an embodiment of the present utility model;

Fig. 3 is a second schematic cross-sectional view of a cooking apparatus according to an embodiment of the present utility model;

fig. 4 is an exploded schematic view of a cooking apparatus according to an embodiment of the present utility model;

fig. 5 is a schematic structural diagram of a microwave antenna according to an embodiment of the present utility model;

fig. 6 is a schematic structural diagram of an antenna blade according to an embodiment of the present utility model;

FIG. 7 is a schematic dimensional view of an antenna shaft according to an embodiment of the present utility model;

fig. 8 is an exploded view of a microwave antenna according to an embodiment of the present utility model;

Fig. 9 is a schematic structural view of a cooking apparatus according to an embodiment of the present utility model at another view angle.

In the figure:

100-a microwave generating device; 200-a barbecue generating device;

1-an inner cavity shell; 11-a bottom wall; 12-side walls; 121-heat dissipation holes; 13-top wall; 131-coupling port;

2-a top heating assembly; 8-an air guide assembly;

10-a microwave antenna; 101-antenna axis; 1011-second connection holes; 102-antenna blades; 1021-microwave opening; 1022-first connection holes; 103-blade gap; 104-mica sheets; 1041-fixing holes; 105-antenna collar; 106-sector connection;

20-magnetron; 30-a waveguide; 40, a stirring motor; 401-fixing seat; 50-microcrystalline glass; 501-a metal fixing ring; 60-seal.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Fig. 1 shows a schematic structural view of a cooking apparatus according to the present embodiment at one viewing angle. Fig. 2 shows a schematic cross-sectional view of the cooking apparatus according to the present embodiment. As shown in fig. 1 to 2, the present embodiment provides a cooking apparatus including an inner cavity case 1, a microwave generating device 100, a grill generating device 200, and a steam generating device, wherein a cooking chamber is formed in the inner cavity case 1, and food to be cooked can be placed in the cooking chamber. The microwave generating device 100, the grill generating device 200, and the steam generating device are all located on the housing 1 to cook food in the cooking chamber through different cooking modes. Optionally, the cooking device further includes an air guiding component 8, the inner cavity shell 1 is provided with a heat dissipation hole 121, the air guiding component 8 is arranged on the inner cavity shell 1, and heat generated during cooking in the cooking cavity can be discharged from the heat dissipation hole 121, so that the phenomenon that internal components of the cooking device are damaged due to long-time working under a high-temperature environment is avoided. In this embodiment, the inner housing 1 is made of enamel material. Compared with the inner cavity shell 1 made of stainless steel, the inner wall of the inner cavity shell 1 can be prevented from yellowing due to overhigh temperature in the cooking process, and food residues on the inner wall of the inner cavity shell 1 can be cleaned conveniently.

It should be noted that, in order to ensure healthy diet of the user, in this embodiment, when the barbecue mode is operated, the microwave generating device 100 and the barbecue generating device 200 work simultaneously or work alternately, so as to achieve the effects of degreasing and salt reduction, and the two generating devices work simultaneously to further improve the cooking efficiency, thereby improving the satisfaction degree and the use experience of the user.

Further, the inner cavity housing 1 includes a bottom wall 11, a top wall 13 and a plurality of side walls 12, the top wall 13 and the bottom wall 11 are arranged in parallel up and down, the side walls 12 are vertically arranged between the top wall 13 and the bottom wall 11 along the circumference of the bottom wall 11 and are respectively connected with the top wall 13 and the bottom wall 11, a taking and placing opening is formed in one of the side walls 12, and a user can put food to be cooked into the cooking chamber or take the food out of the cooking chamber through the taking and placing opening. In this embodiment, the number of the side walls 12 is four, the bottom wall 11, the top wall 13 and the four side walls 12 are enclosed to form a cuboid structure, the four side walls 12 are a front side wall, a rear side wall, a left side wall and a right side wall, and the front side wall is provided with the picking and placing opening. When the user is facing the access opening, the side wall 12 close to the user is a front side wall, the side wall 12 far away from the user is a rear side wall, the side wall 12 at the left hand side of the user is a left side wall, and the side wall 12 at the right hand side of the user is a right side wall.

In the present embodiment, the heat dissipation holes 121 are disposed on the rear sidewall, and the air guide assembly 8 is disposed outside the rear sidewall. Of course, in other embodiments, the heat dissipation holes 121 and the air guiding assembly 8 may be disposed on the left side wall or the right side wall of the bottom wall 11, the top wall 13, which can achieve the above effects.

Fig. 3 shows a second schematic cross-sectional view of the cooking apparatus according to the present embodiment. Fig. 4 shows an exploded schematic view of the cooking apparatus provided in the present embodiment. As shown in fig. 3 to 4, the microwave generating apparatus 100 includes a microwave antenna 10, a magnetron 20, a waveguide 30, and a stirring motor 40, and a coupling port 131 is provided on a top wall 13; the magnetron 20 is arranged outside the top wall 13 and is communicated with the coupling port 131 through the waveguide 30; the stirring motor 40 is arranged on the waveguide 30; the microwave antenna 10 includes an antenna shaft 101 and an antenna blade 102 connected, the antenna blade 102 is located in the inner cavity housing 1, and the antenna shaft 101 is connected to an output end of the stirring motor 40 through a coupling port 131. When the microwave operation mode is started, microwaves generated by starting the magnetron 20 are transmitted through the waveguide 30, the waveguide 30 can couple the microwaves generated by the magnetron 20 into the cooking cavity through the coupling port 131, and then in the transmission and coupling process, the stirring motor 40 drives the antenna blade 102 to rotate through the antenna shaft 101, so that the microwaves can cover all positions of the cooking cavity, and food in the cooking cavity is heated.

In order to make the coupling port 131 have better coupling degree so as to excite more working modes and form more uniform energy distribution, in the embodiment, the coupling port 131 has a circular structure, and the diameter of the coupling port 131 is 28 mm-32 mm; and/or the distance between the center of the coupling port 131 and the front side wall of the inner cavity shell 1 is 195 mm-215 mm; and/or the distance between the center of the coupling port 131 and the rear side wall of the inner chamber housing 1 is 170mm to 190mm. Illustratively, the coupling port 131 may be 29mm, 30mm, or 31mm in diameter; the distance between the center of the coupling hole 131 and the front side wall is 200mm, 203mm, 205mm, 208mm or 210mm; the distance between the center of the coupling port 131 and the rear sidewall is 175mm, 178mm, 180mm, 182mm or 185mm. The coupling port 131 with the above size and the setting position can also ensure that the input voltage ratio in the cooking chamber is smaller than the maximum voltage standing wave ratio allowed by the magnetron 20, and prevent the magnetron 20 from being burned out.

It should be noted that, the output shaft of the stirring motor 40 may be made of a metal material such as copper, iron or aluminum, and the metal material does not absorb microwaves, or absorbs a small amount of microwaves, so as to reduce microwave loss and improve cooking efficiency of food.

Further, the microwave generating apparatus 100 further includes a holder 401, and the stirring motor 40 is connected to the waveguide 30 through the holder 401. Specifically, the fixing base 401 is welded to the waveguide 30, and the connection is stable. The stirring motor 40 is mounted on the fixing seat 401 through screws, is convenient to operate, and is stable in connection.

Further, a receiving groove is formed around the coupling opening 131 on the top wall 13, the microcrystalline glass 50 is covered at the opening of the receiving groove, and the antenna blade 102 is located between the receiving groove and the microcrystalline glass 50. A wave stirring cavity is formed between the accommodating groove and the glass ceramic 50, and on one hand, the wave stirring cavity is used for accommodating the microwave antenna 10, so that the arrangement of the microwave generating device 100 does not influence the internal cooking space of the inner cavity shell 1; on the other hand, the glass ceramic 50 can block the pollutants such as oil smoke in the cooking chamber and prevent the pollutants from splashing on the antenna blade 102. Optionally, a seal 60 is also provided between the glass-ceramic 50 and the top wall 13 to ensure the sealing of the stir chamber. In this embodiment, the seal 60 may be a rubber seal.

Further, the glass ceramic 50 is fixed to the top wall 13 by a metal fixing ring 501. Specifically, the metal fixing ring 501 is provided with a stepped hole, the glass ceramics 50 can be borne at the step of the stepped hole, and the metal fixing ring 501 is connected to the top wall 13 through a screw, so that stable installation of the glass ceramics 50 is realized.

Fig. 5 shows a schematic structural diagram of the microwave antenna 10 provided in the present embodiment. Fig. 6 shows a schematic structural diagram of the antenna blade 102 provided in the present embodiment. The microwave antenna in the prior art has the defects of low heating efficiency and uneven microwave field distribution, so that food is heated slowly and unevenly easily, and the quality requirement of a user on the food cannot be met. In order to solve the above-described problem, as shown in fig. 5 to 6, in the present embodiment, the antenna blade 102 is provided with a microwave opening 1021. The antenna blade 102 of this structure can evenly radiate the microwave in the waveguide 30 coupling cooking chamber to each corner of cooking chamber, makes the microwave more even distribution in the cooking chamber, and food in the cooking chamber is heated by even, and food each position all is heated to the required time of predetermineeing the temperature less, has improved cooking efficiency, has promoted user's use experience. In the present embodiment, the shape of the microwave opening 1021 is rectangular. As can be seen from the simulated data, the rectangular structure of the microwave opening 1021 is capable of radiating microwaves within the cooking chamber more uniformly. Of course, in other embodiments, the shape of the microwave opening 1021 may also be a circle, an ellipse, a regular or irregular polygon.

Optionally, the number of the antenna blades 102 is at least two, at least two antenna blades 102 are arranged at intervals along the circumferential direction of the antenna shaft 101, and the microwave opening 1021 is provided on at least one antenna blade 102. In the present embodiment, the number of antenna blades 102 is two. The setting mode can ensure the uniformity of microwave radiation, simplify the processing procedure, improve the processing efficiency and reduce the processing cost. Of course, in other embodiments, the number of the antenna blades 102 may be any number of three or more, which is not limited in this embodiment.

In the present embodiment, a blade gap 103 exists between two adjacent antenna blades 102. Of course, in other embodiments, the edges of two adjacent antenna blades 102 may be disposed in a fitting manner, that is, there is no gap between the two adjacent antenna blades 102, which can achieve the above-mentioned effects.

Optionally, the profile of the blade gap 103 includes a first straight line, a second straight line, and a connecting section connecting the first straight line and the second straight line, the connecting section including a straight line section and/or an arc section. Illustratively, the blade gap 103 has an outline that is composed of a first straight line segment, an arc segment, and a second straight line segment that are connected in sequence (as shown in fig. 5). Of course, in other embodiments, the profile of the blade gap 103 may also include a first straight line and a second straight line that are directly connected and disposed at an included angle, i.e., the blade gap 103 has a V-shaped structure.

A fan-shaped connecting portion 106 is provided between two adjacent antenna blades 102, an apex a of the fan-shaped connecting portion 106 coincides with the axis of the antenna shaft 101, and the radii of the fan-shaped connecting portions 106 are not all equal. Wherein the fan-shaped connection portion 106 and the adjacent two antenna blades 102 form the blade gap 103 therebetween.

Optionally, in this embodiment, the antenna blade 102 has a fan-shaped structure, and the edges thereof adopt rounded transition, so that uniformity of microwave radiation can be ensured. When the number of antenna blades 102 is plural, the central angles of the plural antenna blades 102 are not all equal. Illustratively, the number of antenna blades 102 is two, and the central angles of the two antenna blades 102 are equal or unequal; or the number of antenna blades 102 may be three, wherein the central angles of two antenna blades 102 are equal, and the central angle of the third antenna blade 102 is not equal to the central angles of the other two antenna blades 102.

Fig. 7 shows a schematic dimensional diagram of the antenna shaft 101 provided in the present embodiment. As shown in fig. 7, the antenna shaft 101 is a stepped shaft, the small end of the antenna shaft 101 is connected to the antenna blade 102, the radius of the large end of the antenna shaft 101 is R ₁, the height of the large end of the antenna shaft 101 is H ₁, the radius of the small end of the antenna shaft 101 is R ₂, and the height of the small end of the antenna shaft 101 is H ₂, wherein: 11.5 mm.ltoreq.H ₁≤16mm,15mm≤R₁≤17.5mm;8mm≤H₂≤10mm,7mm≤R₂.ltoreq.9 mm to fit the dimensions of the inner chamber housing 1. Of course, in other embodiments, the radius R ₁ of the large end of the antenna shaft 101, the height H ₁ of the large end of the antenna shaft 101, the radius R ₂ of the small end of the antenna shaft 101, and the height H ₂ of the small end of the antenna shaft 101 may be adjusted according to practical situations, which is not limited in this embodiment.

As shown in fig. 6 and 7, a first connection hole 1022 is provided on the antenna blade 102, and a second connection hole 1011 is provided on the antenna shaft 101, and a connection member can sequentially pass through the first connection hole 1022 and the second connection hole 1011, thereby achieving connection between the antenna blade 102 and the antenna shaft 101. In the present embodiment, the connecting member is a screw, one of the first and second connecting holes 1022 and 1011 is a through hole, and the other is a threaded hole, and the screw connection has advantages of convenience in operation and connection fastening.

Fig. 8 shows an exploded schematic view of the microwave antenna 10 provided in the present embodiment. As shown in fig. 8, the microwave antenna 10 further includes a mica sheet 104, where the mica sheet 104 is provided with an avoiding hole, and the small end of the antenna shaft 101 passes through the avoiding hole on the mica sheet 104 and is connected with the antenna blade 102. By providing the mica sheet 104 which is resistant to high temperature and does not obstruct microwaves, the emission port of the magnetron 20 can be protected, and the damage to the magnetron 20 caused by the entry of pollutants such as food or oil smoke in the cooking cavity into the emission port of the magnetron 20 can be prevented. Optionally, an antenna collar 105 is further disposed between the antenna shaft 101 and the mica sheet 104 to provide axial positioning for the fit between the antenna shaft 101 and the mica sheet 104.

Optionally, fixing holes 1041 are provided at four corners of the mica sheet 104. After the antenna shaft 101, the antenna blade 102, the mica sheet 104 and the antenna collar 105 are integrally connected by corresponding screws, the fixing member can pass through the fixing hole 1041 and be connected to the top wall 13, thereby realizing the connection between the microwave antenna 10 and the inner cavity housing 1.

Fig. 9 shows a schematic structural view of the cooking apparatus according to the present embodiment at another view angle. As shown in fig. 9 in combination with fig. 2, in order to further improve cooking efficiency, the grill generating device 200 includes a top heating assembly 2, and the top heating assembly 2 is disposed around the outer circumference of the microwave antenna 10. In this arrangement, the microwave generating device 100 and the top heating assembly 2 may be operated simultaneously or alternately when cooking food in the cooking chamber, to improve cooking efficiency and to uniformly color the food.

The specific structure and shape of the top heating assembly 2 in this embodiment are not limited, and may be employed as long as heating of food in the cooking chamber can be achieved. In addition, the specific structure of the steam generating device is not limited in this embodiment, as long as the steam generating device can realize the steam mode can be employed.

Note that the above is only a preferred embodiment of the present utility model and the technical principle applied. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims (12)

1. A microwave antenna, comprising:

an antenna shaft (101);

And the antenna blade (102) is connected to the antenna shaft (101), and a microwave opening (1021) is arranged on the antenna blade (102).

2. A microwave antenna according to claim 1, characterized in that the microwave opening (1021) is polygonal or circular in shape.

3. The microwave antenna according to claim 1, characterized in that the number of the antenna blades (102) is at least two, at least two of the antenna blades (102) are arranged at intervals along the circumferential direction of the antenna shaft (101), and at least one of the antenna blades (102) is provided with the microwave opening (1021).

4. A microwave antenna according to claim 3, characterized in that a blade gap (103) is present between two adjacent antenna blades (102).

5. A microwave antenna according to claim 4, characterized in that the profile of the blade gap (103) comprises a first straight line and a second straight line which are directly connected and arranged at an angle; or alternatively

The profile of the blade gap (103) comprises a first straight line, a second straight line and a connecting section connecting the first straight line and the second straight line, wherein the connecting section comprises a straight line section and/or an arc line section.

6. A microwave antenna according to claim 3, characterized in that a sector connection (106) is provided between two adjacent antenna blades (102), the radii of the sector connection (106) not being all equal.

7. A microwave antenna according to any of claims 1-6, characterized in that the antenna blade (102) is shaped as a fan-like structure.

8. The microwave antenna according to claim 7, characterized in that when the number of the antenna blades (102) is plural, the central angles of the plurality of the antenna blades (102) are not all equal.

9. The microwave antenna according to any of claims 1-6, characterized in that the antenna shaft (101) is a stepped shaft, the small end of the antenna shaft (101) is connected to the antenna blade (102), the radius of the large end of the antenna shaft (101) is R ₁, the height of the large end of the antenna shaft (101) is H ₁, the radius of the small end of the antenna shaft (101) is R ₂, the height of the small end of the antenna shaft (101) is H ₂, wherein:

11.5mm≤H₁≤16mm,15mm≤R₁≤17.5mm；

8mm≤H₂≤10mm,7mm≤R₂≤9mm。

10. a cooking apparatus, comprising:

The inner cavity shell (1), wherein a coupling port (131) is arranged on the top wall (13) of the inner cavity shell (1);

A magnetron (20) and a waveguide (30), wherein the magnetron (20) is arranged on the outer side of the top wall (13) and is communicated with the coupling port (131) through the waveguide (30);

A stirring motor (40) provided on the waveguide (30);

The microwave antenna according to any of claims 1-9, wherein an antenna blade (102) of the microwave antenna is located in the inner cavity housing (1), and wherein an antenna shaft (101) of the microwave antenna is connected to an output end of the stirring motor (40) through the coupling opening (131).

11. Cooking apparatus according to claim 10, characterized in that a receiving groove is provided on the top wall (13) around the coupling opening (131), the opening of the receiving groove is covered with glass ceramics (50), and the antenna blade (102) is located between the receiving groove and the glass ceramics (50).

12. Cooking apparatus according to claim 10, characterized in that the coupling opening (131) has a circular structure, the diameter of the coupling opening (131) being 28-32 mm; and/or the distance between the center of the coupling port (131) and the front side wall of the inner cavity shell (1) is 195-215 mm; and/or the distance between the center of the coupling port (131) and the rear side wall of the inner cavity shell (1) is 170 mm-190 mm.