CN216124279U

CN216124279U - Microwave shielding door and microwave steaming and baking oven comprising same

Info

Publication number: CN216124279U
Application number: CN202120116957.8U
Authority: CN
Inventors: 刘钦; 吴永强; 任国栋; 刘骏; 贺聪
Original assignee: Superbox Technology Beijing Co ltd
Current assignee: Superbox Technology Beijing Co ltd
Priority date: 2021-01-15
Filing date: 2021-01-15
Publication date: 2022-03-25
Anticipated expiration: 2031-01-15

Abstract

The utility model provides a microwave shielding door and a microwave steaming and baking oven comprising the same, wherein the microwave shielding door comprises: a first shielding plate forming a first shielding region toward a region of the microwave cooking cavity; the first shielding plate is connected with the first surface of the second shielding plate, and the area of the second shielding plate is larger than that of the first shielding plate; the second surface of the second shielding plate is arranged on the door body; and the sealing ring and the first shielding plate are arranged at intervals, and the second shielding plate on the inner side of the sealing ring faces towards the area of the cavity of the microwave cooking cavity to form a second shielding area. By the embodiment of the utility model, the microwave leaked from the inside of the microwave equipment to the outside can be effectively shielded.

Description

Microwave shielding door and microwave steaming and baking oven comprising same

Technical Field

The utility model relates to the technical field of kitchen electrical equipment, in particular to a microwave shielding door and a microwave steaming and baking oven comprising the same.

Background

Microwave equipment such as a microwave oven or a microwave steaming and baking oven heats food by generating microwaves during work, a door of the microwave oven or the microwave steaming and baking oven is opened before heating, the food to be heated is put into a box body in the microwave oven or the microwave steaming and baking oven, then the door is closed, and the food to be heated is subjected to microwave heating. Since the door is not fixedly connected to the cabinet, there is an inevitable case where the microwave leaks out through the door during the heating process. Microwave leakage is one of the difficult problems of microwave equipment, and if the microwave leakage exceeds standard, the microwave leakage interferes an electric signal and damages electronic components to cause equipment failure; and the human body is injured if the weight is heavy. The national standard requires that the microwave leakage is less than or equal to 5mW/cm2 (microwave frequency 2450MHz) at the position 5cm away from the equipment.

The statements in the background section are merely technical equivalents which may be known to a person skilled in the art and do not, of course, represent prior art in this field.

SUMMERY OF THE UTILITY MODEL

According to the embodiment of the utility model, the microwave shielding door structure adopting double shielding of the first shielding plate, the second shielding plate and the sealing ring is adopted, so that the problem of microwave leakage in microwave equipment in the prior art is solved.

In view of at least one of the drawbacks of the prior art, the present invention proposes a microwave shielded door comprising:

a first shielding plate forming a first shielding region toward a region of the microwave cooking cavity;

the first shielding plate is connected with the first surface of the second shielding plate, and the area of the second shielding plate is larger than that of the first shielding plate;

the second surface of the second shielding plate is arranged on the door body; and

the sealing ring and the first shielding plate are arranged at intervals, and the second shielding plate on the inner side of the sealing ring faces towards the area of the cavity of the microwave cooking cavity to form a second shielding area.

According to an aspect of the utility model, wherein the seal ring is fixed around the second shield plate.

According to an aspect of the utility model, wherein the seal ring is provided on the second shield plate.

According to one aspect of the utility model, a groove is formed in the door body, the groove surrounds the second shielding plate, and the sealing ring is fixed in the groove.

According to an aspect of the present invention, further comprising a connector, through which the first shield plate and the first face of the second shield plate are connected.

According to an aspect of the present invention, wherein the door body includes a door outer panel and a door inner panel fixedly connected, the second face of the second shield plate is mounted on the door inner panel.

According to an aspect of the present invention, further comprising a door handle and a door handle fixing box, the upper sides of the door outer panel and the door inner panel are provided with hole grooves, and the door handle is mounted on the outer side of the door outer panel through the hole grooves and the door handle fixing box.

According to an aspect of the present invention, the periphery of the first shielding plate includes a bent portion facing the second shielding plate, and the bent portion is provided with a choke groove structure.

The utility model also relates to a microwave steaming and baking oven, comprising:

a case, a hollow part inside of which forms a cooking cavity;

a microwave generating part configured to generate microwaves, and to conduct the microwaves into the cooking cavity to heat food to be heated;

the heating device and the hot air fan are configured to enable heat generated by the heating device to form hot air and send the hot air into the cooking cavity;

a steam generator configured to blow steam generated and released by the steam generator into the cooking cavity;

the circulating fan is configured to enable the hot air and/or the steam to be uniformly distributed in the cooking cavity; and

the microwave shielding door of any one of the above claims, wherein the microwave shielding door is disposed at a front portion of the box body and configured to shield microwaves leaked from the cooking cavity to the outside when the microwave steaming oven operates.

According to one aspect of the utility model, the microwave shielding door further comprises a door connecting part, wherein hole grooves capable of accommodating the door connecting part are arranged on two sides of the lower part of the door body in the microwave shielding door, and the microwave shielding door can be opened and closed through the door connecting part.

According to one aspect of the utility model, the cooking device further comprises an air duct located above the cooking cavity, wherein hot air blown by the heating device and the hot air fan is dispersed into the cooking cavity along the air duct.

According to one aspect of the utility model, the end of the air duct far away from the heating device is gradually narrowed, the heating device is a carbon heating device, the circulating fan is a turbine fan, and the steam generator is a steam boiler.

According to one aspect of the utility model, the air conditioner further comprises a temperature sensor, wherein the temperature sensor is arranged on one side, far away from the heating device and the hot air fan, in the air duct and is configured to sense the temperature of hot air blown by the heating device and the hot air fan.

According to an aspect of the present invention, the microwave oven further comprises a controller respectively coupled to the microwave generating part, the heating device, the steam generator and the temperature sensor, configured to control the microwave generating part to generate microwaves and monitor humidity in the cooking cavity, and control the steam generator to generate steam and control heating temperature of the heating device according to the temperature of the hot wind sensed by the temperature sensor and the humidity.

According to one aspect of the utility model, the cooking device further comprises a hot air hole plate and a steam hole plate, the hot air hole plate is arranged at the junction of the air channel and the cooking cavity, a plurality of small holes are formed in the hot air hole plate, the hot air is dispersed into the cooking cavity through the hot air hole plate, the steam hole plate is arranged below or at the bottom of the side wall of the cooking cavity, a plurality of small holes are formed in the steam hole plate, and the steam is dispersed into the cooking cavity through the steam hole plate.

According to an aspect of the present invention, wherein a plurality of steam ports through which the steam is dispersed into the cooking cavity are provided under a rear portion of the cooking cavity or on a sidewall of the cooking cavity, the microwave steaming oven further comprises a partition wall provided between the circulation fan and the cooking cavity, the partition wall being provided with a plurality of circulation holes, wherein the circulation fan is configured such that the gas in the cooking cavity exits the cooking cavity through a part of the circulation holes and re-enters the cooking cavity through another part of the circulation holes.

According to the embodiment of the utility model, the first shielding plate, the second shielding plate and the sealing ring are respectively arranged on the microwave shielding door, and the position relation between the sealing ring and the first shielding plate and the second shielding plate is adopted, so that the microwave leaked from the microwave steaming oven is subjected to double shielding, the sealing property and the microwave shielding property of the microwave shielding door are improved, and the condition that the microwave leaks outwards is effectively avoided.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 shows a schematic view of a microwave shielded door according to one embodiment of the present invention;

FIG. 2 illustrates an exploded view of a microwave shielded door according to one embodiment of the present invention;

FIG. 3 illustrates a side view of the internal structure of a microwave cooking oven in accordance with one embodiment of the present invention; and

FIG. 4 illustrates a side view of the internal structure of a microwave cooking oven in accordance with another embodiment of the present invention.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of 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 considered as limiting the present invention. 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, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection, either mechanically, electrically, or in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the utility model. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

FIG. 1 shows a schematic view of a microwave shielded door according to one embodiment of the present invention. Figure 2 illustrates an exploded view of a microwave shielded door according to one embodiment of the present invention. As shown in fig. 1 and 2, the microwave shield door 10 includes: the door comprises a first shielding plate 11, a second shielding plate 12, a door body 13 and a sealing ring 14. The area of the first shielding plate 11 facing the cavity of the microwave cooking cavity forms a first shielding area. The first shielding plate 11 is connected to the first surface 12-1 of the second shielding plate 12, and the area of the second shielding plate 12 is larger than that of the first shielding plate 11. The second surface 12-2 of the second shielding plate 12 is attached to the door 13. The sealing ring 14 is spaced apart from the first shielding plate 11, that is, the inner side of the sealing ring 14 is spaced apart from the outer side of the first shielding plate 11 by a predetermined distance without being in direct contact with the outer side of the first shielding plate 11. The area of the second shielding plate 12 inside the sealing ring 14 facing the cavity of the microwave cooking cavity forms a second shielding area. It can be seen that the second shielding region is a portion of the second shielding plate 12 surrounded by the gasket 14, which is larger than the first shielding plate 11, in addition to the first shielding region.

As shown in fig. 1, the first shielding plate 11 is protrudingly disposed on the second shielding plate 12, so that when the microwave shielding door 10 is closed, the first shielding plate 11 extends into a cooking cavity of the microwave steaming oven for shielding microwaves generated in the microwave steaming oven to prevent the microwaves from leaking outwards. According to one embodiment of the present invention, the gap between the first shielding plate 11 and the front plate of the microwave oven is set to be 1-2 mm (i.e. the gap between the outer circumference of the first shielding plate 11 and the cooking cavity). The second shielding plate 12 and the sealing ring 14 are attached to the front plate surface, and the second shielding plate 12 is used for shielding microwaves leaking outwards through the gap, so that the first shielding plate 11 and the second shielding plate 12 form a double-insurance for shielding microwaves. Meanwhile, the sealing ring 14 plays a role in sealing steam, so that the steam in the microwave oven does not overflow outwards.

According to an embodiment of the present invention, as shown in fig. 1, the sealing ring 14 is fixed around the second shielding plate 12. Optionally, the sealing ring 14 is tightly attached around the second shielding plate 12 by tension.

According to an embodiment of the utility model, the sealing ring 14 is arranged on the second shield plate 12. Specifically, the seal ring 14 is disposed in a region surrounded by the second shield plate 12 and extending beyond the first shield plate 11, and is disposed at a distance from the first shield plate 11.

According to an embodiment of the present invention, a groove (not shown) is formed in the door 13, the groove surrounds the second shielding plate 12, and the shape of the groove corresponds to the shape of the sealing ring 14, so that the sealing ring 14 is fixed in the groove and is not easily removed.

Compared with the prior art, the sealing ring 14 of the present invention is not directly contacted with the first shielding plate 11, but is arranged in the above embodiments, and the sealing ring 14 is arranged at a distance from the first shielding plate 11. Such an arrangement not only reduces the processing requirements and processing precision for the first shielding plate 11 and the second shielding plate 12 during the production and processing of the microwave shielding door 10, but also better shields the leaked microwaves.

According to an embodiment of the present invention, as shown in fig. 1 and 2, the microwave shielded door 10 further includes a connector 15, and the first shielding plate 11 and the first surface 12-1 of the second shielding plate 12 are connected through the connector 15. Optionally, the connector 15 is fixedly connected to the first shielding door 11 and configured to support the first shielding plate 11.

According to an embodiment of the present invention, as shown in fig. 1 and 2, the door body 13 includes a door outer panel 13-1 and a door inner panel 13-2 fixedly connected, and the second face 12-2 of the second shielding panel 12 is mounted on the door inner panel 13-2.

According to one embodiment of the present invention, as shown in fig. 1 and 2, the microwave shielded door 10 further includes a door handle 16 and a door handle fixing box 17. The upper sides of the door outer panel 13-1 and the door inner panel 13-2 are provided with hole grooves 18, and the door handle 16 is mounted on the outer side of the door outer panel 13-1 through the hole grooves 18 and the door handle fixing boxes 17. The door handle 16 and the door handle fixing box 17 are matched, and the opening and the closing of the microwave shielding door 10 are controlled by rotating the door handle 16.

According to an embodiment of the present invention, as shown in fig. 1 and 2, the periphery of the first shielding plate 11 includes a bent portion 11-1 facing the second shielding plate 12, and the bent portion 11-1 is provided with a choke groove structure. Optionally, the depth of the choke groove in the choke groove structure is one quarter of a microwave wavelength.

FIG. 3 illustrates a side view of the internal structure of a microwave cooking oven in accordance with one embodiment of the present invention. As shown in fig. 3, the microwave steaming and baking oven 100 includes: a case 110, a microwave generating part 120, a heating device 130, a hot air fan 140, a steam generator 150, a circulation fan 160, and the microwave shield door 10. The cooking chamber 101 is formed in a hollow portion of the inside of the cabinet 110, and food is placed in the cooking chamber 101 to be heated and processed. The microwave generating part 120 is optionally disposed on the top of the cooking cavity 101, and is configured to generate microwaves and conduct the microwaves into the cooking cavity 101 to heat food to be heated. The heating device 130 and the hot air fan 140 are optionally disposed at the rear of the cooking chamber 101, and are configured to generate hot air from the heat generated by the heating device 130 and send the hot air into the cooking chamber 101. The steam generator 150 is optionally disposed at the rear of the cooking cavity 101, and is configured to blow steam generated and released by the steam generator 150 into the cooking cavity 101. The circulation fan 160 is optionally disposed at the rear of the cooking cavity 101 and in front of the steam generator 150, and is configured to uniformly distribute the hot wind and/or the steam in the cooking cavity 101. The microwave shielding door 10 is disposed at the front of the cabinet and configured to shield microwaves leaking from the cooking cavity 101 to the outside when the microwave steaming and baking oven 100 is operated.

According to an embodiment of the present invention, the microwave steaming and baking oven 100 further includes a door connecting portion (not shown), and the microwave shielding door 100 is provided with holes for receiving the door connecting portion at both sides of the lower portion of the door body, and the microwave shielding door 100 can be opened and closed by the door connecting portion.

According to an embodiment of the present invention, as shown in fig. 3, the microwave steaming oven 100 further includes an air duct 170 located above the cooking cavity 101, wherein an end of the air duct 170 away from the heating device 130 is tapered. Alternatively, the air duct 170 may be narrowed from an end near the heating device 130, or from any middle portion of the air duct 170 in a direction away from the heating device 130, so that the hot air is dispersed into the cooking cavity 101 along the air duct 170. The hot air fan 140 is disposed at the rear of the heating device 130, and when the heating device 130 generates heat, the hot air fan 140 transfers the heat forward and downward from the rear of the microwave steaming oven 100 along the air duct 170 to fill the entire air duct 170 and the cooking cavity 101.

FIG. 4 illustrates a side view of the internal structure of a microwave cooking oven in accordance with another embodiment of the present invention. As shown in fig. 3 and 4, according to a preferred embodiment of the present invention, the vertical section of the wind tunnel 170 is trapezoidal or triangular. When the hot wind is transferred forward from the rear of the microwave oven 100 along the wind channel 170, the hot wind is forced to change the originally horizontal flowing direction by the slope 171 formed by one inclined side with a trapezoid or triangle section, and then flows to the lower part of the microwave oven 100, i.e. the cooking cavity 101, and gradually fills the whole cooking cavity 101.

According to one embodiment of the present invention, as shown in fig. 3 and 4, the heating device 130 is a carbon heating pipe, the circulation fan 160 is a turbo fan, and the steam generator 150 is a steam boiler. Specifically, the turbofan is configured such that when the turbofan rotates, a central region thereof sucks air from the inside of the cooking cavity 101, air in a middle region of the cooking cavity 101 is sucked into the turbofan and then blown out from a peripheral region of the turbofan, and such repetition and alternation are performed to realize circulation ventilation in the inside of the cooking cavity 101, thereby finally enabling the steam to uniformly fill the entire cooking cavity 101.

According to an embodiment of the present invention, as shown in fig. 3 and 4, the microwave steaming and baking oven 100 further includes a temperature sensor 180, wherein the temperature sensor 180 is disposed inside the air duct 170 on a side away from the heating device 130 and the hot air fan 140, and is configured to sense a temperature of hot air blown by the heating device 130 and the hot air fan 140.

According to an embodiment of the present invention, the microwave steaming oven 100 further comprises a controller (not shown in the figure), which is respectively coupled to the microwave generating part 120, the heating device 130, the steam generator 150 and the temperature sensor 180, and is configured to control the microwave generating part 120 to generate microwaves, monitor the humidity in the cooking cavity 101, control the steam generator 150 to generate steam according to the temperature of the hot wind sensed by the temperature sensor 180 and the humidity, and control the heating temperature of the heating device 130.

According to one embodiment of the present invention, as shown in fig. 3 and 4, the microwave steaming oven 100 further includes a hot air hole plate 172 and a steam hole plate 151. The hot air hole plate 172 is arranged at the junction of the air duct 170 and the cooking cavity 101, and a plurality of small holes are formed in the hot air hole plate 172, so that the hot air is dispersed into the cooking cavity 101 through the hot air hole plate 172, and the cooking cavity 101 is uniformly filled with the hot air. The steam hole plate 151 is provided at the bottom of the cooking chamber 101, and has a plurality of small holes formed therein, and the steam is dispersed into the cooking chamber 101 through the steam hole plate 151. Through the steam hole plate 151, the steam generated by the steam generator 150 can more uniformly fill the cooking cavity 101, and the bottom of the food can be better moistened, thereby preserving the fresh taste of the food.

According to an embodiment of the present invention, as shown in fig. 3 and 4, a plurality of steam vents 152 are provided under the rear or on the sidewall of the cooking chamber 101, and the steam is dispersed into the cooking chamber 101 through the plurality of steam vents 152. The plurality of steam ports 152 function similarly to the steam hole plate 151, and thus, a detailed description thereof is omitted. The microwave steaming oven 100 further includes a partition wall 161 disposed between the circulation fan 160 and the cooking cavity 101, the partition wall 161 being provided with a plurality of circulation holes 162, wherein the circulation fan 160 is configured to allow the gas in the cooking cavity 101 to exit the cooking cavity 101 through a part of the circulation holes and re-enter the cooking cavity 101 through another part of the circulation holes. Wherein the gas inside the cooking cavity 101 is sucked into the circulating fan 160 through a part of the circulating holes distributed in the central area of the circulating fan 160, and is released into the cooking cavity 101 through another part of the circulating holes distributed in the peripheral area of the circulating fan 160, thereby implementing a plurality of alternating thermal cycles inside the cooking cavity 101, so that the gas is well mixed and uniformly distributed in the cooking cavity 101. In the embodiment of fig. 3, the steam generator 150 is located behind the circulation fan 160, but the present invention is not limited thereto, and the steam generator 150 may be located below the circulation fan 160, and steam is supplied into the cooking chamber 101 through the steam hole plate 151 or the steam port 152 by a separate pipe.

In addition, in the embodiment of the present invention, the heating device 130 and the hot wind fan 140 are used to generate hot wind, and the steam generator 150 is used to generate steam and supply the steam to the cooking cavity, which are separate devices that can be separately controlled, i.e., can be separately turned on or off, and thus can be flexibly applied to heating various types of food.

According to the embodiment of the utility model, the first shielding plate, the second shielding plate and the sealing ring are respectively arranged on the microwave shielding door, so that the microwave leakage is effectively shielded through the double-shielding microwave shielding door structure, and the sealing tightness of steam in the microwave steaming oven is ensured. The microwave shielded door of embodiments of the present invention provides improved microwave shielding as compared to the prior art, such that the amount of microwave leakage measured at the probe head portion extending into the portal is reduced from an initial 10.5Mw/cm2, as compared to the prior art, from at least greater than 5Mw/cm2 to less than 1Mw/cm2 as measured at the probe head portion extending into the portal. If the microwave leakage is measured at a distance of 5cm from the equipment according to the requirements of national standards, the microwave leakage is less than or equal to 0.3mW/cm2 (microwave frequency of 2450 MHz). Contrast commercial microwave oven door body and level shielding metal sheet at the inner circle, thereby it is difficult to press from both sides the thing to destroy shielding metal sheet roughness and influence the microwave shielding effect to open and shut in the operation.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A microwave shielded door, comprising:

2. The microwave shielded door of claim 1 wherein the gasket is secured around the periphery of the second shield plate.

3. The microwave shielded door of claim 1 wherein the gasket is disposed on the second shield panel.

4. The microwave shielded door according to claim 1, wherein the door body has a groove formed therein, the groove surrounding the second shield plate, and the gasket is fixed in the groove.

5. The microwave shielded door of any one of claims 1 to 4 further comprising a connector by which the first shield plate is connected to the first face of the second shield plate.

6. The microwave shielded door according to any one of claims 1 to 4, wherein the door body comprises an outer door panel and an inner door panel fixedly connected to each other, and the second side of the second shielding plate is mounted on the inner door panel.

7. The microwave shield door as claimed in claim 6, further comprising a door handle and a door handle fixing box, wherein the upper sides of the door outer and inner panels are provided with hole grooves, and the door handle is installed at the outer side of the door outer panel through the hole grooves and the door handle fixing box.

8. The microwave shielded door of claim 2 wherein the perimeter of the first shield includes a bend toward the second shield, the bend having a choke groove structure disposed thereon.

9. A microwave steaming and baking oven, comprising:

a case, a hollow part inside of which forms a cooking cavity;

a steam generator configured to generate steam and blow the steam into the cooking cavity;

the microwave shielded door of any one of claims 1-8, disposed at a front portion of the cabinet, configured to shield microwaves that leak from the cooking cavity to the outside during operation of the microwave steamer.

10. The microwave oven according to claim 9, further comprising a door connecting portion, wherein both sides of a lower portion of the door body of the microwave shield door are provided with a hole groove capable of receiving the door connecting portion, and the microwave shield door is openable and closable by the door connecting portion.

11. A microwave cooking oven as claimed in claim 9 or 10, further comprising an air duct located above the cooking chamber, wherein the hot air blown by the heating means and hot air fan is dispersed into the cooking chamber along the air duct.

12. A microwave steaming oven as claimed in claim 11, wherein the end of the air duct remote from the heating means is tapered, the heating means is a carbon heating means, the circulation fan is a turbo fan and the steam generator is a steam boiler.

13. A microwave steaming oven as claimed in claim 11, further comprising a temperature sensor disposed within the air duct on a side remote from the heating means and the hot air fan, configured to sense the temperature of hot air blown by the heating means and the hot air fan.

14. A microwave steaming oven as claimed in claim 13, further comprising a controller respectively coupled to the microwave generating part, the heating means, the steam generator and the temperature sensor, configured to control the microwave generating part to generate microwaves, and to monitor the humidity in the cooking chamber, and to control the steam generator to generate steam and to control the heating temperature of the heating means according to the temperature of the hot air sensed by the temperature sensor and the humidity.

15. The microwave steaming oven according to claim 11, further comprising a hot air hole plate provided at a boundary between the air duct and the cooking chamber and having a plurality of holes formed thereon, through which the hot air is dispersed into the cooking chamber, and a steam hole plate provided below or at a bottom of a sidewall of the cooking chamber and having a plurality of holes formed thereon, through which the steam is dispersed into the cooking chamber.

16. The microwave cooking oven according to claim 9 or 10, wherein a plurality of steam ports are provided on a rear lower portion or a side wall of the cooking cavity, through which the steam is dispersed into the cooking cavity, the microwave cooking oven further comprising a partition wall provided between the circulation fan and the cooking cavity, the partition wall being provided with a plurality of circulation holes, wherein the circulation fan is configured such that the gas in the cooking cavity exits the cooking cavity through a part of the circulation holes and re-enters the cooking cavity through another part of the circulation holes.