CN113507757A

CN113507757A - Microwave cooking appliance

Info

Publication number: CN113507757A
Application number: CN202110825144.0A
Authority: CN
Inventors: 党子建; 刘涛; 郑弘佑; 鹿旭; 黄颖雯; 周妙翠; 张智
Original assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Priority date: 2021-07-21
Filing date: 2021-07-21
Publication date: 2021-10-15

Abstract

The application discloses microwave cooking utensil includes: the microwave oven comprises a box body, a microwave generating device and a control device, wherein a cooking cavity is arranged in the box body, the box body comprises a reflecting plate, and the reflecting plate is used for receiving the microwaves emitted by the microwave generating device and reflecting the microwaves back to the cooking cavity; the microwave generating device is arranged on the box body and is suitable for sending microwaves to the cooking cavity; wherein the reflection plate includes: a central region and a peripheral region located around the central region, at least a portion of the peripheral region bulging towards the cooking cavity to form a first bulge, the first bulge having a height greater than a height of the central region. According to the microwave cooking utensil of this application, through changing the structure on the reflecting plate, can change the distribution of cooking intracavity microwave to can realize that interior region and outside region just unfreeze fast simultaneously when the bold is eaten material unfreezes, very big shortening the latency that the consumer unfreezes.

Description

Microwave cooking appliance

Technical Field

The application relates to the field of household appliances, in particular to a microwave cooking appliance.

Background

At present, two thawing modes are mainly adopted for a microwave cooker, one mode is thawing by adopting medium-low fire power, but the time consumption is more; the other method is to unfreeze by adopting high fire power firstly and then low fire power, but because the microwave is not uniform, when the microwave is used for unfreezing large meat blocks, the microwave power is lengthened along with the depth, so that the microwave only unfreezes the outer surface, and the center cannot be effectively unfrozen.

Disclosure of Invention

The present application is directed to solving at least one of the problems in the prior art.

To this end, an object of the present application is to provide a microwave cooking appliance that distributes microwaves into a form suitable for thawing, thereby achieving rapid thawing.

In order to achieve the above object, the present application provides a microwave cooking appliance, comprising: the microwave oven comprises a box body, a microwave generating device and a control device, wherein a cooking cavity is arranged in the box body, the box body comprises a reflecting plate, and the reflecting plate is used for receiving the microwaves emitted by the microwave generating device and reflecting the microwaves back to the cooking cavity; the microwave generating device is arranged on the box body and is suitable for sending microwaves to the cooking cavity; wherein the reflection plate includes: a central region and a peripheral region located around the central region, at least a portion of the peripheral region bulging towards the cooking cavity to form a first bulge, the first bulge having a height greater than a height of the central region.

According to the microwave cooking utensil of this application, through changing the structure on the reflecting plate, can change the distribution of cooking intracavity microwave to can realize that interior region and outside region just unfreeze fast simultaneously when the bold is eaten material unfreezes, very big shortening the latency that the consumer unfreezes.

Further, the central region includes: a second boss, a height of the first boss being greater than a height of the second boss.

Further, the first protruding portion is provided in plurality, and the height of the first protruding portion away from the central region is greater than the height of the first protruding portion close to the central region.

Further, the plurality of first protrusions are configured as a plurality of first protrusion groups arranged in a direction approaching or departing from the central region, each of the first protrusion groups including at least one of the first protrusions.

Further, the first protruding portion in each first protruding group is plural, and the heights of the plural first protruding portions are the same.

Further, the second projecting portion is configured in plural, and the heights of the plural second projecting portions are the same.

Further, the edge of the first protrusion is the edge of the reflection plate or the edge adjacent to the reflection plate, and the height of the first protrusion gradually decreases in a direction approaching the central region.

Further, the reflecting surface of the first convex part facing the cooking cavity is configured to be a plane or a cambered surface.

Further, the edge of the second protrusion is the edge of the reflection plate or the edge adjacent to the reflection plate, and the height of the second protrusion gradually decreases in a direction approaching the center of the central region.

Further, the reflecting plate is a back plate, a top plate or a side plate of the box body.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic view of a reflector plate according to an embodiment of the present application;

FIG. 2 is a side view of the reflector plate of FIG. 1 according to one embodiment of the present application;

FIG. 3 is a schematic structural view of a microwave cooking appliance according to an embodiment of the present application;

FIG. 4 is a schematic view of a reflector plate according to another embodiment of the present application;

FIG. 5 is a schematic view of a reflector plate according to yet another embodiment of the present application;

FIG. 6 is a schematic view of a reflector plate according to yet another embodiment of the present application;

FIG. 7 is a schematic view of a reflector plate according to yet another embodiment of the present application;

FIG. 8 is a schematic view of a reflector plate according to yet another embodiment of the present application;

FIG. 9 is a schematic view of a reflector plate according to yet another embodiment of the present application;

FIG. 10 is a schematic view of a first protrusion and a second protrusion according to one embodiment of the present application;

FIG. 11 is a side view of a first protrusion and a second protrusion according to one embodiment of the present application;

FIG. 12 is a schematic view of a first protrusion and a second protrusion according to another embodiment of the present application;

FIG. 13 is a side view of a first protrusion and a second protrusion according to yet another embodiment of the present application.

Reference numerals:

the microwave cooking appliance 100 is a microwave cooking appliance,

the cooking chamber 101 is provided with a cooking chamber,

the combination of the cabinet 10, the reflection plate 30,

the first projection group 40, the first projection 41,

a second projection group 50, and a second projection 51.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

Along with the deepening of urbanization, more people live in a commodity house, the demand on a microwave cooker is gradually increased, the use scene is more diversified, the microwave cooker is a cooking appliance which utilizes food to absorb microwave energy in a microwave field to heat the food, a microwave electric field is established in a cooking cavity by the microwave generated by a microwave generating device, certain measures are taken to ensure that the microwave electric field is uniformly distributed in the cooking cavity as much as possible, the food is placed in the microwave electric field, and the cooking time and the intensity of the microwave electric field are controlled by a control center to carry out various cooking processes.

The existing microwave cooking device has a thawing function, thawing is popular with more and more people as an important function of a microwave oven, but the thawing process has many problems, such as long thawing time, easy over-cooking and the like.

At present, two thawing modes are mainly adopted for a microwave cooker, one mode is thawing by adopting medium-low fire power, but the time consumption is more; the other method is to unfreeze by adopting high fire power firstly and then low fire power, but because the microwave is not uniform, when the microwave is used for unfreezing large meat blocks, the microwave power is lengthened along with the depth, so that the microwave only unfreezes the outer surface, and the center cannot be effectively unfrozen. For example: the unfreezing mode of unfreezing on time is adopted, the firepower is constant, and more than one 500g of meat can be thawed for more than one minute if the meat is completely unfrozen; the method of unfreezing according to the weight can unfreeze quickly, the time is about 15 minutes, but the unfreezing effect on large meat blocks in different shapes is poor. Moreover, the thawing program is set in advance when the microwave cooking appliance leaves the factory, thawing cannot be performed according to the actual condition of food, and it is difficult to reach the thawing end point, that is, the food is just thawed completely without being overcooked, the combination of thawing firepower and time is not optimal, and the optimal effect of thawing in a short time cannot be achieved.

The invention idea of the application is that a thawing distribution mechanism is formed by changing microwave distribution in the cooking cavity, so that the problem that food thawed by a user is too cooked and has poor effect in a thawing process by using a microwave cooking appliance can be solved.

Efficient microwave thawing needs to gradually weaken microwave distribution from the center to the periphery, so that microwave thawing is uniform inside and outside. As known to those skilled in the art, the dielectric properties of microwaves in different food materials are different, and when microwaves are used for heating different food materials, the dielectric loss factor changes greatly at different temperatures, the penetration radius of the microwaves is sharply reduced along with the temperature rise, and the specific formula of the half-power traditional radius is as follows:

wherein

λ₀Is a free space wavelength; epsilon_rIs the dielectric constant of the medium; tan δ is dielectric loss.

This application carries out the mode that four sections accuse temperature unfreezes to the change of dielectric loss factor in the process of unfreezing to the fastest mode realizes the effect of unfreezing, reaches same effect and can realize that the time of unfreezing shortens by a large amount.

The microwave cooking appliance 100 in the embodiment of the present application is described below with reference to fig. 1 to 13.

According to an embodiment of the present application, a microwave cooking appliance 100 includes: a case 10 and a microwave generating device.

The microwave cooking appliance 100 mainly converts electric energy into microwave cooking food, a box body 10 of the microwave cooking appliance 100 consists of a front door, a rear plate, a left side plate, a right side plate, a top plate and a bottom plate, a cooking cavity 101 is arranged in the box body 10, the food is heated in the cooking cavity 101, a microwave generating device is arranged in the box body 10 and generally arranged on the left side plate or the right side plate, the microwave generating device is constructed as a magnetron, a power supply supplies voltage to the magnetron, the magnetron continuously generates microwave and sends the microwave to the cooking cavity 101 under the excitation of the power supply, and the food absorbs microwave energy so as to realize heating.

Also within the cabinet 10 is a reflection plate 30, and the reflection plate 30 is mainly used for receiving microwaves emitted from the microwave generating device and reflecting the received microwaves back to the cooking chamber 101.

This application makes microwave distribution focus in the central zone of reflecting plate 30 through changing the structure on the reflecting plate 30 to realize that food is inside and outside quick unfreezing simultaneously.

Specifically, the present invention configures the reflection plate 30 in a structure with a low center and a high periphery, and a height difference is formed between the center and the periphery, so that the microwave distribution focal distance is focused on the center area of the reflection plate 30 during reflection, thereby achieving the rapid thawing of the food inside and outside simultaneously.

The first protrusion 41 is provided on the reflection plate 30 toward one side of the cooking cavity 101, and the first protrusion 41 protrudes toward the cooking cavity 101, and according to the distribution of the first protrusion 41, the whole reflection plate 30 may be divided into a central region and a peripheral region around the central region, for example: the first protrusions 41 are distributed over a part of the peripheral area, or the first protrusions 41 are distributed over the entire peripheral area, wherein the height of protrusion of the first protrusions 41 needs to be greater than the height of the central area. It is understood that the central region may be provided with a protrusion, but the protrusion height of the protrusion in the central region is smaller than the protrusion height of the first protrusion 41 in the peripheral region; alternatively, the first convex portion 41 is provided only on the peripheral region, and no convex portion is provided on the central region, so that it suffices that the height of the first convex portion 41 is greater than that of the central region.

It should be noted that the height is smaller in the central area than in the peripheral area, compared with the distance from the center of the microwave cooking appliance 100, than in the first protruding portion 41 in the peripheral area, and it is understood that the distance from the central area to the center of the microwave cooking appliance 100 is larger than the distance from the first protruding portion 41 in the peripheral area to the center of the microwave cooking appliance 100.

The central region is a middle position on the shape of the reflection plate 30, the peripheral region is a position around the central region, and the central region and the peripheral region are formed oppositely, i.e., two positions on the reflection plate 30, wherein a position closer to the center of the structure of the reflection plate 30 is the central region, and a position relatively farther away is the peripheral region. The drawings of the present application show the central region and the peripheral regions at both sides of the central region as only one specific embodiment, and the present application is not specifically limited as long as the structure of the reflection plate 30 is a structure with a low middle part and a high periphery, which is the protection scope of the present application.

Since the first protruding portion 41 is provided, the central region is farther from the center of the microwave cooking appliance 100 than the peripheral region is from the microwave cooking appliance 100, that is, the reflecting plate 30 forms a structure in which the central region is lower and the peripheral region is higher, so that the microwave distribution focal distance is in the central region of the reflecting plate 30, thereby realizing the rapid thawing of the food inside and outside simultaneously.

According to the microwave cooking appliance 100 of the present application, by changing the structure on the reflection plate 30, the distribution of microwaves in the cooking cavity 101 can be changed, so that the simultaneous and rapid thawing of the inner region and the outer region can be realized when the large food material is thawed, and the waiting time for thawing of the consumer is greatly shortened.

According to an embodiment of the present application, as shown in fig. 2 to 13, the second protruding portion 51 protruding toward the cooking chamber 101 is provided on the central region, and the height of the first protruding portion 41 needs to be greater than that of the second protruding portion 51 due to the requirement of satisfying the structural feature that the peripheral region is higher than the central region.

According to an embodiment of the present application, as shown in fig. 1, a plurality of first protrusions 41 are provided on the reflection plate 30, the plurality of first protrusions 41 have different heights, and among the plurality of first protrusions 41, a height of a first protrusion 41 distant from a central region is greater than a height of a first protrusion 41 close to the central region.

In one embodiment, there are two first protrusions 41 on the reflective plate 30, and the first protrusions 41 may have a gradually decreasing protrusion height from the peripheral region to the central region, as shown in fig. 5, in which it can be seen that the protrusion height of the first protrusions 41 on both sides is the largest, the protrusion height of the first protrusion 41 in the middle is the smallest, and the protrusion height of the first protrusion 41 is gradually decreased from both sides to the middle.

In another embodiment, there are a plurality of first protrusions 41 on the reflection plate 30, and the plurality of first protrusions 41 may be in the form of gradually decreasing protrusion heights from the peripheral region to the central region, as shown in fig. 2, in which it can be seen that the protrusion heights of the first protrusions 41 on both sides are the largest, the protrusion height of the first protrusion 41 near the central region is the smallest, and the protrusion height of the first protrusion 41 gradually decreases from both sides to the middle.

According to an embodiment of the present application, the plurality of first protrusions 41 may be divided into a plurality of first protrusion groups 40 according to the protrusion height of the first protrusions 41, the plurality of first protrusion groups 40 are arranged on the reflective plate 30 along the length direction of the reflective plate 30, that is, the plurality of first protrusion groups 40 are closer to or farther from the central region, the protrusion height of the first protrusion group 40 closer to the central region is smaller, and of course, at least one first protrusion 41 is included in each first protrusion group 40.

Specifically, the first convex portion 41 in each first convex group 40 is plural.

As shown in fig. 1, a plurality of first protrusion groups 40 are arranged on the reflection plate 30 along the length direction of the reflection plate 30, each first protrusion group 40 includes four first protrusions 41, the first protrusions 41 are arranged in the width direction of the reflection plate 30, and the protrusion heights of the first protrusions 41 in the same first protrusion group 40 are the same.

According to an embodiment of the present application, there may be a plurality of second protrusions 51 in the central region, and the plurality of second protrusions 51 may be in a form of gradually decreasing protrusion heights from the near-peripheral region to the central region, as shown in fig. 2, in which it can be seen that the protrusion heights of the second protrusions 51 near both sides of the peripheral region are the largest, the protrusion height of the second protrusion 51 in the middle of the central region is the smallest, and the protrusion height of the second protrusion 51 gradually decreases from the near-peripheral region to the middle.

The plurality of second protrusions 51 may be divided into a plurality of second protrusion groups 50 according to the protrusion height of the second protrusions 51, the plurality of second protrusion groups 50 are arranged on the reflective plate 30 along the length direction of the reflective plate 30, that is, the plurality of second protrusion groups 50 are close to or far away from the peripheral region, the protrusion height of the second protrusion group 50 closer to the peripheral region is larger, and of course, at least one second protrusion 51 is included in each second protrusion group 50.

Specifically, the second convex portion 51 in each second convex group 50 is plural.

As shown in fig. 1, a plurality of second protrusion groups 50 are arranged on the reflection plate 30 along the length direction of the reflection plate 30, each second protrusion group 50 includes four second protrusions 51, the second protrusions 51 are arranged in the width direction of the reflection plate 30, and the protrusion heights of the second protrusions 51 in the same second protrusion group 50 are the same.

On the reflective plate 30, in some embodiments, the edge of the first protruding portion 41 is the edge of the reflective plate 30, or is adjacent to the edge of the reflective plate 30, and the height of the first protruding portion 41 gradually decreases from the peripheral region to the central region, and the reflective surface facing the cooking cavity 101 is a plane or an arc surface.

Like the first protruding portion 41, the edge of the second protruding portion 51 is the edge of the reflection plate 30, or the edge of the reflection plate 30 is adjacent to the edge of the reflection plate 51, and the height of the second protruding portion 51 gradually decreases from the peripheral region to the central region, and the reflection surface facing the cooking cavity 101 is a plane or an arc surface.

In the microwave cooking appliance 100, the front door is a front door, and the reflecting plate 30 is not generally provided, and the tray is provided on the bottom plate for holding food, so the reflecting plate 30 is not provided on the bottom plate, the microwave generating device is provided on one of the left and right side plates, and the reflecting plate 30 is not provided on the side plate provided with the microwave generating device, so the reflecting plate 30 is installed on the back plate, the top plate or the side plate not provided with the microwave generating device of the cabinet 10.

In a specific embodiment, the height difference between the height of the first protruding part 41 and the height of the central area is 3mm to 20mm, and preferably, the height difference between the height of the first protruding part 41 and the height of the central area is 5mm to 10 mm.

The height difference is in the area, microwaves can be better concentrated in the central area, the unfreezing of food is accelerated, and the waiting time is reduced.

In some embodiments of the present application, the results of the tests performed using the microwave cooking appliance 100 of the present application are as follows:

example 1:

500g of beef filling was thawed in a model a microwave cooking appliance 100. The original thawing program time is 15min, the reflecting plate 30 is changed from a plane shape to the reflecting plate 30 in the application figure 1, the maximum height of the first protruding portion 41 is 10mm, the minimum height of the second protruding portion 51 is 4mm, the height difference between the maximum first protruding portion 41 and the plane of the reflecting plate 30 in the central area is 10mm, and experiments show that the microwave distribution in the central area is twice of the original microwave distribution, and the thawing time is shortened to 7 minutes and 30 seconds under the condition that the thawing effect on 500g of beef filling is the same.

Example 2:

500g of beef filling was thawed in a model B microwave cooking appliance 100. The original thawing time is 15min, the reflector 30 is changed from a plane shape to the reflector 30 in fig. 4, the maximum height of the first protruding portion 41 is 11mm, the minimum height of the first protruding portion 41 is 2mm, the height difference between the maximum first protruding portion 41 and the central area is 11mm, tests show that the microwave distribution in the central area is three times of the original microwave distribution, and the thawing time is shortened to 5 minutes and 50 seconds under the condition of the same thawing effect on 500g of beef filling.

Example 3:

500g of beef filling was thawed in a model C microwave cooking appliance 100. The original thawing time is 15min, the reflector 30 is changed from a plane shape to the reflector 30 in the application figure 5, the maximum height of the first convex part 41 is 11mm, the minimum height of the second convex part 51 is 2mm, the height difference between the maximum first convex part 41 and the minimum second convex part 51 on the central area is 9mm, and experiments show that the microwave distribution in the central area is three times of the original microwave distribution, and the thawing time is shortened to 5 minutes and 50 seconds under the condition of the same thawing effect on 500g of beef filling.

A microwave cooking appliance 100 according to an embodiment of the present application is described in detail below with reference to fig. 1 to 4. It is to be understood that the following description is illustrative only and is not to be taken as a specific limitation on the application.

Microwave cooking appliance 100, comprising: a case 10 and a microwave generating device.

The present application constructs the reflecting plate 30 as a structure with a low center and a high periphery, and a height difference is formed between the center and the periphery, so that the microwave distribution focal distance is in the central area of the reflecting plate 30 during reflection, thereby realizing the rapid thawing of the inside and the outside of the food at the same time.

The first protrusion 41 is provided on the reflection plate 30 toward one side of the cooking cavity 101, and the first protrusion 41 protrudes toward the cooking cavity 101, and according to the distribution of the first protrusion 41, the whole reflection plate 30 may be divided into a central region and a peripheral region around the central region, for example: the first protrusions 41 are distributed over a part of the peripheral area, or the first protrusions 41 are distributed over the entire peripheral area, wherein the height of protrusion of the first protrusions 41 needs to be greater than the height of the central area. It is understood that the central region may be provided with a raised portion, but it is required that the raised height of the raised portion of the central region is smaller than the raised height of the first raised portion 41 in the peripheral region; alternatively, the first convex portion 41 is provided only on the peripheral region, and no convex portion is provided on the central region, so that it suffices that the height of the first convex portion 41 is greater than that of the central region.

The central region is a middle position on the shape of the reflection plate 30, and the peripheral region is a position around the central region.

The second protrusion 51 protruding toward the cooking chamber 101 is provided on the central region, and the height of the first protrusion 41 needs to be greater than that of the second protrusion 51 because of the requirement to satisfy the structural feature that the peripheral region is higher than the central region.

The plurality of first protrusions 41 are provided on the reflection plate 30, the plurality of first protrusions 41 have different heights, and among the plurality of first protrusions 41, the height of the first protrusion 41 distant from the central region is greater than the height of the first protrusion 41 near the central region.

Two first protrusions 41 are formed on the reflection plate 30, and the first protrusions 41 may have a form in which the protrusion height gradually decreases from the peripheral region to the central region, as shown in fig. 5, it can be seen that the protrusion height of the first protrusions 41 at both sides is the largest, the protrusion height of the first protrusion 41 at the middle is the smallest, and the protrusion height of the first protrusion 41 gradually decreases from both sides to the middle.

The reflection plate 30 has a plurality of first protrusions 41, and the plurality of first protrusions 41 may be formed such that the protrusion heights thereof gradually decrease from the peripheral region to the central region, the protrusion heights of the first protrusions 41 at both sides are the largest, the protrusion heights of the first protrusions 41 at the central region are the smallest, and the protrusion heights of the first protrusions 41 gradually decrease from both sides to the center.

The plurality of first protrusions 41 may be divided into a plurality of first protrusion groups 40 according to the protrusion height of the first protrusions 41, the plurality of first protrusion groups 40 are arranged on the reflection plate 30 along the length direction of the reflection plate 30, that is, the plurality of first protrusion groups 40 are close to or far from the central region, the protrusion height of the first protrusion group 40 closer to the central region is smaller, and of course, at least one first protrusion 41 is included in each first protrusion group 40.

The first convex portion 41 in each first convex group 40 is plural. A plurality of first protrusion groups 40 are arranged on the reflection plate 30 along the length direction of the reflection plate 30, each first protrusion group 40 includes four first protrusions 41, the first protrusions 41 are arranged in the width direction of the reflection plate 30, and the protrusion heights of the first protrusions 41 in the same first protrusion group 40 are the same.

There may be a plurality of second protrusions 51 in the central region, and the plurality of second protrusions 51 may be in the form of gradually decreasing protrusion heights from the near-peripheral region to the central region, as shown in fig. 2, in which it can be seen that the protrusion heights of the second protrusions 51 near both sides of the peripheral region are the largest, the protrusion height of the second protrusion 51 in the middle of the central region is the smallest, and the protrusion height of the second protrusion 51 gradually decreases from the near-peripheral region to the middle.

The second convex portion 51 in each second convex group 50 is plural. A plurality of second protrusion groups 50 are arranged on the reflection plate 30 along the length direction of the reflection plate 30, each second protrusion group 50 includes four second protrusions 51, the second protrusions 51 are arranged in the width direction of the reflection plate 30, and the protrusion heights of the second protrusions 51 in the same second protrusion group 50 are the same.

On the reflection plate 30, in some cases, the edge of the first protrusion 41 is the edge of the reflection plate 30, or is adjacent to the edge of the reflection plate 30, and the height of the first protrusion 41 gradually decreases from the peripheral region to the central region, and the reflection surface facing the cooking cavity 101 is a plane or an arc surface.

As shown in fig. 4, 7-8, and 10, the number of the second protruding portions 51 is two, and two second protruding portions 51 are sequentially arranged in the vertical direction, and the left and right sides of each second protruding portion 51 are respectively provided with the first protruding portion 41, and the protruding height of each first protruding portion 41 gradually decreases in the direction toward the second protruding portion 51, and the inner surfaces of the second protruding portions 51 and the inner surfaces of the corresponding left and right first protruding portions 41 may be connected and smoothly transited.

As shown in fig. 5 to 6, 9 and 12, the second protruding portion 51 is one, and the left and right sides of the second protruding portion 51 are respectively provided with the first protruding portions 41, the protruding height of each first protruding portion 41 gradually decreases in the direction toward the second protruding portion 51, the inner surface of the second protruding portion 51 may be connected with and smoothly transited to the inner surfaces of the left and right first protruding portions 41, of course, the inner surface of the second protruding portion 51 may be spaced from the inner surfaces of the left and right first protruding portions 41, and the inner surface of the second protruding portion 51 may be configured.

The inner surface of the second protruding portion 51 may be a plane or an arc, and the inner surfaces of the first protruding portions 41 on the left and right sides of the second protruding portion 51 may also be a plane or an arc.

In the description of the present application, it is to be understood that the terms "upper", "lower", "inner", "outer", "axial", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A microwave cooking appliance, comprising:

the microwave oven comprises a box body (10), wherein a cooking cavity (101) is arranged in the box body (10), the box body (10) comprises a reflecting plate (30), and the reflecting plate (30) is used for receiving the microwaves emitted by the microwave generating device and reflecting the microwaves back to the cooking cavity (101);

a microwave generating device arranged on the box (10) and adapted to send microwaves to the cooking chamber (101); wherein

The reflection plate (30) includes: a central region and a peripheral region around the central region, at least part of the peripheral region bulging towards the cooking chamber (101) to form a first bulge (41), the first bulge (41) having a height greater than the height of the central region.

2. A microwave cooking appliance according to claim 1, wherein the central region comprises: a second boss (51), the height of the first boss (41) being greater than the height of the second boss (51).

3. Microwave cooking appliance according to claim 1 or 2, characterized in that the first raised portion (41) is provided in plurality, the height of the first raised portion (41) remote from the central area being greater than the height of the first raised portion (41) close to the central area.

4. The microwave cooking appliance according to claim 3, wherein the plurality of first protrusions (41) are configured as a plurality of first protrusion groups (40) arranged in a direction approaching or departing from the central region, each of the first protrusion groups (40) including at least one of the first protrusions (41).

5. The microwave cooking appliance according to claim 4, wherein the first protrusions (41) of each of the first protrusion groups (40) are plural, and heights of the plural first protrusions (41) are the same.

6. The microwave cooking appliance according to claim 2, wherein the second raised portion (51) is configured in plurality, and the heights of the plurality of second raised portions (51) are the same.

7. Microwave cooking appliance according to claim 1, characterized in that the edge of the first raised portion (41) is the edge of the reflector plate (30) or adjacent to the edge of the reflector plate (30), the height of the first raised portion (41) decreasing in a direction approaching the central area.

8. Microwave cooking appliance according to claim 7, characterized in that the reflective surface of the first raised portion (41) towards the cooking cavity (101) is configured as a plane or as a cambered surface.

9. Microwave cooking appliance according to claim 2, characterized in that the edge of the second raised portion (51) is the edge of the reflector plate (30) or adjacent to the edge of the reflector plate (30), the height of the second raised portion (51) decreasing in a direction towards the center of the central area.

10. The microwave cooking appliance according to claim 1, wherein the reflection plate (30) is a back plate, a top plate or a side plate of the cabinet (10).