Steam inlet structure and cooking appliance having the same

Abstract

The present invention discloses a steam inlet structure and a cooking appliance having the same. The steam inlet structure includes: a box body having a cooking cavity therein; a damping plate disposed in the cooking cavity and configured to reduce the flow rate of the flowing steam; and a steam nozzle facing the damping plate. The steam inlet structure according to the embodiments of the present invention has advantages such as high steam inlet efficiency and fast filling speed.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical appliance manufacturing, and more particularly, to a steam inlet structure and a cooking appliance having the steam inlet structure. Background Art

[0002] In related technologies, for cooking appliances such as steam ovens, the speed at which steam fills the cooking cavity during cooking is slow, resulting in a slow increase in the temperature of the cooking cavity and affecting cooking efficiency and cooking effects. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a steam inlet structure, which has advantages such as high steam inlet efficiency and fast filling speed.

[0004] The present invention also provides a cooking appliance having the steam inlet structure.

[0005] To achieve the above object, according to an embodiment of the first aspect of the present invention, a steam inlet structure is provided, the steam inlet structure including: a box body having a cooking cavity therein; a damping plate disposed in the cooking cavity and configured to reduce the flow rate of the flowing steam; and a steam nozzle facing the damping plate.

[0006] The steam inlet structure according to the embodiment of the present invention has advantages such as high steam inlet efficiency and fast filling speed.

[0007] In addition, the steam inlet structure according to the above embodiment of the present invention may further have the following additional technical features:

[0008] According to an embodiment of the present invention, a plurality of spaced-apart protrusions are formed on a surface of the damping plate facing the steam nozzle.

[0009] According to an embodiment of the present invention, the plurality of protrusions are arranged in an array on the damping plate.

[0010] According to an embodiment of the present invention, the plurality of protrusions are spaced apart along the length direction of the damping plate and each protrusion extends along the width direction of the damping plate.

[0011] According to an embodiment of the present invention, the damping plate is a corrugated plate.

[0012] According to an embodiment of the present invention, the damping plate includes a plurality of broken lines with a V-shaped cross section.

[0013] According to an embodiment of the present invention, a damping surface for reducing the flow rate of steam is formed on a surface of the damping plate facing the steam nozzle through surface treatment.

[0014] According to an embodiment of the present invention, the damping plate is formed on the top wall of the cooking cavity.

[0015] According to an embodiment of the present invention, the steam nozzle is provided on the side wall of the cooking cavity.

[0016] According to an embodiment of the present invention, the steam nozzle is located in the upper part of the side wall of the cooking cavity.

[0017] According to an embodiment of the present invention, the steam nozzle extends obliquely upward from outside to inside.

[0018] According to an embodiment of the present invention, there are multiple steam nozzles which are spaced apart on the cooking cavity.

[0019] According to an embodiment of the present invention, there are two steam nozzles which are respectively located on the two side walls of the cooking cavity.

[0020] According to an embodiment of the second aspect of the present invention, a cooking appliance is provided, and the cooking appliance includes the steam inlet structure according to the embodiment of the first aspect of the present invention.

[0021] The cooking appliance according to the embodiment of the present invention has advantages such as high cooking efficiency by utilizing the steam inlet structure according to the embodiment of the first aspect of the present invention.

[0022] According to an embodiment of the present invention, the cooking appliance is a steam cooking appliance.

[0023] The additional aspects and advantages of the present invention will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present invention. Brief Description of the Drawings

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, where:

[0025] Figure 1 is a schematic structural diagram of the steam inlet structure according to the embodiment of the present invention.

[0026] Figure 2 is a schematic structural diagram of the steam inlet structure according to the embodiment of the present invention.

[0027] Reference Numerals: steam inlet structure 1, box body 10, cooking cavity 11, damping plate 20, protrusion 21, broken line segment 22, steam nozzle 30. Detailed Description of the Embodiments

[0028] This application is made based on the inventor's discovery and recognition of the following facts and problems:

[0029] In related technologies, cooking appliances such as steam ovens have a slow speed of steam filling the cooking cavity during cooking, resulting in a slow temperature rise of the cooking cavity, which affects the cooking efficiency and cooking effect.

[0030] Specifically, in the steam oven in related technologies, the steam is sprayed into the cooking cavity through a nozzle at a certain speed. Due to the relatively fast spraying speed of the steam, the steam is mainly concentrated on the path in the extending direction of the nozzle, and it takes a long time to gradually fill other positions of the cooking cavity, resulting in a slow filling speed and a slow temperature rise of the cooking cavity, which affects the cooking efficiency and cooking effect.

[0031] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0033] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] The steam inlet structure 1 according to an embodiment of the present invention will be described below with reference to the drawings.

[0035] As Figure 1 and Figure 2 shown, the steam inlet structure 1 according to an embodiment of the present invention includes a box body 10, a damping plate 20, and a steam nozzle 30.

[0036] The cooking cavity 11 is provided inside the box body 10. The damping plate 20 is arranged inside the cooking cavity 11 and is configured to reduce the flow velocity of the flowing steam. The steam nozzle 30 faces the damping plate 20.

[0037] Those skilled in the art can understand that "the steam nozzle 30 faces the damping plate 20" means the direction in which the steam nozzle 30 can guide the steam to spray, so that the steam nozzle 30 sprays towards the damping plate 20, which can be perpendicular to the damping plate 20 or at a certain angle with the damping plate 20. Those skilled in the art can adjust the position and angle of the steam nozzle 30 according to actual needs so that the steam sprayed by the steam nozzle 30 can spray towards the damping plate 20.

[0038] According to the steam inlet structure 1 of the embodiment of the present invention, by arranging the damping plate 20, the damping plate 20 is configured to reduce the flow velocity of the flowing steam. In this way, the steam sprayed by the steam nozzle 30 towards the damping plate 20, after contacting the damping plate 20, is affected by the damping structure of the damping plate 20, the speed of the steam flow is reduced, and it diffuses to other positions of the cooking cavity 11 in a direction other than the spraying direction, avoiding the steam from concentrating on the path in the extending direction of the steam nozzle 30, enabling the steam to form an overall steam layer, and squeezing out the air as the steam fills without mixing with the air. Compared with the technical solutions in the related art, it can facilitate the filling of the cooking cavity 11 with steam, quickly fill the cooking cavity 11 with steam, improve the uniformity of steam filling, increase the heating speed of the cooking cavity 11, and improve the cooking efficiency and cooking efficiency.

[0039] Therefore, the steam inlet structure 1 according to the embodiment of the present invention has advantages such as high steam inlet efficiency and fast filling speed.

[0040] Next, the steam inlet structure 1 according to the specific embodiment of the present invention will be described with reference to the accompanying drawings.

[0041] In some specific embodiments of the present invention, as Figure 1 and Figure 2 shown, the steam inlet structure 1 according to the embodiment of the present invention includes a box body 10, a damping plate 20, and a steam nozzle 30.

[0042] Specifically, as Figure 1 and Figure 2 shown, a plurality of spaced protrusions 21 are formed on the surface of the damping plate 20 facing the steam nozzle 30. In this way, the flow of the passing steam can be blocked by the plurality of protrusions 21, thereby reducing the flow velocity of the steam, promoting the dispersion of the steam, facilitating the filling of the cooking cavity 11 with steam, and increasing the filling speed of the cooking cavity 11.

[0043] More specifically, as Figure 1 and Figure 2As shown, a plurality of protrusions 21 are arranged at intervals along the length direction of the damping plate 20, and each protrusion 21 extends along the width direction of the damping plate 20. Thus, the plurality of protrusions 21 extending along the width direction of the damping plate 20 can be used to decelerate and disperse the steam, improving the steam filling speed.

[0044] Specifically, in the horizontal direction, the steam nozzle 30 can be perpendicular to the width direction of the damping plate 20. In this way, the steam sprays onto the damping plate 20 perpendicular to the extending direction of the protrusions 21, which can improve the blocking and dispersing effect of the protrusions 21 on the steam, thus facilitating the dispersed filling of the steam.

[0045] Furthermore, the damping plate 20 includes a plurality of broken lines with a V-shaped cross-section. In other words, each protrusion 21 has a V-shaped cross-section and its length direction is oriented along the width direction of the damping plate 20. This can improve the deceleration and dispersing effect on the steam, facilitating the improvement of the steam filling speed.

[0046] In another specific embodiment of the present invention, the plurality of protrusions 21 are arranged in an array on the damping plate 20. In this way, the deceleration and dispersing effect on the steam can also be achieved.

[0047] In another specific embodiment of the present invention, the damping plate 20 is a corrugated plate. In this way, the deceleration and dispersing effect on the steam can also be achieved, and it is easier to manufacture compared to the broken line structure.

[0048] Advantageously, one side surface of the damping plate 20 facing the steam nozzle 30 forms a damping surface for reducing the steam flow rate through surface treatment. Specifically, the damping surface can cooperate with other protrusion structures. In this way, the damping surface can be used to reduce the steam flow rate, facilitating the deceleration and dispersion of the steam.

[0049] Figure 1 and Figure 2 shows the steam inlet structure 1 according to a specific example of the present invention. As Figure 1 and Figure 2 shown, the damping plate 20 is formed on the top wall of the cooking cavity 11 (the up and down direction is as shown by the arrow in the figure and is only for the convenience of description, not a limitation on the actual setting direction). Since the steam will gradually sink after being ejected, after the steam sprays on the damping plate 20, it can gradually fill downwards through sedimentation, and be evenly and dispersedly spread and filled from top to bottom, facilitating the improvement of the steam filling speed.

[0050] Optionally, as Figure 1 and Figure 2 shown, the steam nozzle 30 is arranged on the side wall of the cooking cavity 11. This can facilitate the installation of the steam nozzle 30 and the connection between the steam nozzle 30 and the steam gas source.

[0051] Advantageously, as Figure 1 and Figure 2As shown, the steam nozzle 30 is located at the upper part of the side wall of the cooking cavity 11. In this way, the steam nozzle 30 can be close to the upper part of the cooking cavity 11. Since the steam will gradually sink after being ejected, the steam can be evenly dispersed from top to bottom after being ejected, which is convenient for improving the filling speed of the steam.

[0052] More advantageously, as Figure 1 and Figure 2 shown, the steam nozzle 30 extends obliquely upward from outside to inside. This can facilitate the steam to be ejected upward and inward from the side wall. Since the steam will gradually sink after being ejected, the steam can be evenly dispersed from top to bottom after being ejected, which is convenient for improving the filling speed of the steam.

[0053] In some other embodiments, there are multiple steam nozzles 30 which are arranged at intervals on the cooking cavity 11. In this way, steam can be ejected toward the damping plate 20 from multiple directions, further improving the uniformity of the steam and facilitating the improvement of the filling speed of the steam.

[0054] Specifically, there are two steam nozzles 30 which are respectively located on the two side walls of the cooking cavity 11. In this way, steam can be ejected toward the damping plate 20 from the left and right directions, further improving the uniformity of the steam and facilitating the improvement of the filling speed of the steam.

[0055] Specifically, the steam nozzle 30 can be communicated with a steam gas source. The steam gas source can be provided by a heating device.

[0056] The heating device according to an embodiment of the present invention will be described below.

[0057] The heating device according to an embodiment of the present invention includes a water tank, an electrode, a conductivity detection device and a controller.

[0058] The electrode is used to heat the water in the water tank. The conductivity detection device detects the conductivity of the water in the water tank. The controller is electrically connected to the electrode and the conductivity detection device respectively to adjust the voltage of the electrode according to the conductivity.

[0059] For the heating device according to an embodiment of the present invention, by arranging the electrode and using the electrode to heat the water in the water tank, compared with the heating device in the related art, the water body itself is used as a resistance medium to be heated, which can reduce the accumulation of scale, avoid affecting the heating efficiency of the heating device, and avoid blockage or even burnout of the heating device.

[0060] Moreover, due to different water qualities, the conductivity of the water body as a resistance medium is also different, resulting in different heating powers of the water body under the same voltage, and it is difficult to control the heating power of the water body. By arranging the conductivity detection device and the controller and using the controller to adjust the voltage of the electrode according to the conductivity, compared with the related art, it is convenient to control the heating power and avoid the heating power being too large or too small and affecting the heating effect.

[0061] Therefore, the heating device according to the embodiments of the present invention has the advantages of being not prone to scale accumulation, high heating efficiency, good heating effect, etc.

[0062] Specifically, there are two electrodes which are arranged at intervals. In this way, the water body between the two electrodes can be used as a resistance medium, and the water body between the two pairs of electrodes is energized to directly heat the water body between the two electrodes, avoiding scale accumulation.

[0063] Optionally, the two electrodes are arranged at intervals in the horizontal direction. In this way, it is convenient for the arrangement of the electrodes and for the two electrodes to enter or exit the water simultaneously when the water level changes.

[0064] Specifically, when the water level in the water tank drops below the electrodes, the two electrodes are no longer electrically conducted by the water body, and the electrical connection between the two electrodes is naturally disconnected, avoiding dry burning. This can not only avoid dry burning, ensure the reliability of the heating device, but also eliminate the protection device and reduce costs.

[0065] More specifically, the electrodes are installed in the water tank through a mounting seat. In this way, it is convenient to install the electrodes in the water tank and to orient and position the electrodes.

[0066] In a specific embodiment, the mounting seat is located on the bottom wall of the water tank, and the electrodes are oriented in the vertical direction. In this way, the electrical connection between the electrodes is disconnected when the water level drops to near the bottom wall, which is convenient for controlling the volume of the water tank.

[0067] In another specific embodiment, the mounting seat is located on the side wall of the water tank and near the bottom wall, and the electrodes are oriented in the horizontal direction. In this way, the electrical connection between the electrodes is disconnected when the water level drops to near the bottom wall, which is convenient for controlling the volume of the water tank.

[0068] Specifically, the heating device further includes a frequency converter, and the controller is electrically connected to the electrodes through the frequency converter. Thus, the voltage of the electrodes can be adjusted by using the frequency converter, which is convenient for controlling the voltage of the electrodes.

[0069] Optionally, the conductivity detection device includes a TDS detection device. Thus, the conductivity of the water body can be fed back according to the TDS detection device, and then the voltage of the electrodes can be calculated according to the required power.

[0070] More specifically, the controller adjusts the voltage of the electrodes according to the detection value of the TDS detection device so that the voltage of the electrodes is proportional to the detection value. It should be understood here that "the voltage of the electrodes is proportional to the detection value" is without considering the target power. In other words, when the target power remains unchanged, the voltage of the electrodes needs to be proportional to the detection value. This can facilitate the control of the heating power of the heating device and avoid the heating power being too high or too low and affecting the heating effect.

[0071] A steam outlet is provided on the water tank. In this way, the steam generated after the water in the water tank is heated by the electrode can be discharged through the steam outlet, and the steam discharged from the steam outlet can be further introduced into the cooking cavity of the cooking appliance, so as to realize steam cooking of food.

[0072] Advantageously, the steam outlet is located at the upper part of the water tank. In this way, it is convenient to control the maximum water storage capacity of the water tank, convenient to control the volume of the water tank, and convenient for steam discharge.

[0073] In one embodiment, the steam outlet may be formed on the top wall of the water tank.

[0074] In another embodiment, the steam outlet may be formed on the side wall of the water tank and adjacent to the top wall.

[0075] Optionally, the electrode is a graphite electrode. Thereby, not only can the accumulation of water scale on the electrode be reduced, but also the cost can be lowered.

[0076] Specifically, the electrode is plate-shaped or column-shaped. In this way, it is convenient to heat the water body.

[0077] The working process of the heating device according to an embodiment of the present invention is described below.

[0078] When the water storage in the water tank is insufficient, the two electrodes are in an open circuit, and the heating device automatically turns off, and no steam is generated.

[0079] When water is added to the water tank until the electrodes are conducted, the heating device is in a conductive state. The graphite electrode utilizes the resistance of the water body in the water tank itself, and the water body itself acts as a resistance medium to heat the water body to generate steam.

[0080] At the same time, the TDS detection device detects the detected value of the TDS of the water, feeds it back to the controller. The controller calculates the conductivity according to the TDS value, reflects the resistivity of the water body, and calculates the voltage value according to the target power value, and feeds it back to the frequency converter to adjust the output voltage. To achieve variable power adjustment of the heating body under different water hardness conditions.

[0081] Specifically, the cooking cavity may also be connected with a steam inlet device and an air extraction device. The steam inlet device may be communicated with the heating device or constituted by the heating device.

[0082] The air extraction device and the steam inlet device operate simultaneously for at least a period of time.

[0083] According to the steam path system of the embodiment of the present invention, by providing an air extraction device, the air in the cooking cavity can be extracted to avoid the remaining air affecting the steam inlet speed and improve the steam inlet efficiency of the steam path system.

[0084] Specifically, when used in a steam cooking appliance, it can improve the rate of steam filling the cooking cavity, improve the cooking efficiency and cooking effect.

[0085] Moreover, by operating the air extraction device and the steam inlet device simultaneously for at least a period of time, that is, the steam path system extracts air and admits steam simultaneously for at least a period of time, compared with the prior art solution of extracting air first and then admitting steam, the waiting time of the user for air extraction can be reduced, the total time required for steam admission can be shortened, and the steam admission efficiency can be improved.

[0086] Specifically, when used in a steam cooking appliance, the total time required for steam filling can be shortened, the waiting time of the user can be reduced, and the cooking efficiency can be improved.

[0087] Therefore, the steam path system according to the embodiment of the present invention has the advantages of fast steam admission speed, high steam admission efficiency, etc.

[0088] Specifically, the cooking cavity has an air extraction hole and a steam inlet hole. The air extraction device is communicated with the cooking cavity through the air extraction hole, and the steam inlet device is communicated with the cooking cavity through the steam inlet hole. This can facilitate the connection of the steam inlet device and the air extraction device to the cooking cavity of the box body.

[0089] Advantageously, the steam inlet hole is arranged at the upper part of the box body, and the air extraction hole is arranged at the lower part of the box body. This can keep the steam inlet hole away from the air extraction hole, preventing the air extraction device from extracting the steam that has just entered the cooking cavity, thereby avoiding affecting the steam admission efficiency.

[0090] More advantageously, one of the steam inlet hole and the air extraction hole is arranged on the side wall of the cooking cavity and the other is arranged on the rear wall of the cooking cavity. This can keep the steam inlet hole away from the air extraction hole, preventing the air extraction device from extracting the steam that has just entered the cooking cavity, thereby avoiding affecting the steam admission efficiency.

[0091] Specifically, the air extraction device extracts air from the cooking cavity for at least a part of the time during the process of cooking food in the cooking cavity. This can improve the steam admission efficiency of the steam path system during the cooking stage, thereby improving the cooking efficiency.

[0092] In a specific embodiment of the present invention, the steam path system further includes a temperature detection device for detecting the temperature in the cooking cavity, and the temperature detection device communicates with the air extraction device. This can control the start and stop timing of the air extraction device according to the temperature in the cooking cavity.

[0093] Specifically, the air extraction device stops operating when the detected value of the temperature detection device is greater than or equal to a predetermined value. This can stop air extraction when the temperature in the cooking cavity reaches the required temperature, avoiding affecting the subsequent cooking effect.

[0094] In another specific embodiment of the present invention, the steam path system further includes a timing device, and the timing device stops the air extraction device after the air extraction device has operated for a predetermined time. Thus, the stop timing of the air extraction device can be controlled by timing, avoiding affecting the subsequent cooking effect.

[0095] Specifically, the steam path system further includes a controller, which communicates with the steam inlet device and the air extraction device respectively. This can facilitate the control of the operating timing of the steam inlet device and the air extraction device.

[0096] More specifically, the controller controls the steam inlet device and the air extraction device to operate simultaneously when starting cooking. In other words, after the cooking appliance receives a cooking instruction, the steam inlet device and the air extraction device operate simultaneously, and the cooking cavity is filled with steam and air extracted at the same time, thereby improving the steam inlet efficiency of the steam path system.

[0097] Optionally, the air extraction device is a unidirectional air pump. This can facilitate the extraction of air from the cooking cavity.

[0098] The working process of the steam path system according to a specific embodiment of the present invention will be described below.

[0099] After the cooking appliance receives a cooking instruction, the steam inlet device and the air extraction device operate simultaneously, and the cooking cavity is filled with steam and air extracted at the same time. The steam gradually fills the cooking cavity, and the temperature in the cooking cavity gradually rises as the steam fills. The temperature detection device detects the temperature in the cooking cavity in real time. When the temperature reaches a predetermined value, it indicates that the steam in the cooking cavity has been filled to the required degree, and the air extraction device stops operating to avoid affecting the subsequent cooking process.

[0100] The control method of the cooking appliance according to an embodiment of the present invention will be described below, including the following steps:

[0101] When starting cooking, steam is introduced into the cooking cavity of the cooking appliance, and the cooking cavity is evacuated;

[0102] Evacuation stops when the temperature of the cooking cavity is greater than or equal to a predetermined temperature.

[0103] The cooking appliance according to an embodiment of the present invention has the advantages of fast steam inlet speed, high steam inlet efficiency, etc.

[0104] The control method of the cooking appliance according to an embodiment of the present invention will be described below, including the following steps:

[0105] When starting cooking, steam is introduced into the cooking cavity of the cooking appliance, and the cooking cavity is evacuated;

[0106] Evacuation stops after a predetermined time.

[0107] The cooking appliance according to an embodiment of the present invention has the advantages of fast steam inlet speed, high steam inlet efficiency, etc.

[0108] The cooking appliance according to an embodiment of the present invention will be described below. The cooking appliance according to an embodiment of the present invention includes the steam inlet structure 1 according to the above embodiment of the present invention.

[0109] The cooking appliance according to an embodiment of the present invention has advantages such as high cooking efficiency by utilizing the steam inlet structure 1 according to the above embodiment of the present invention.

[0110] The cooking appliance is a steam cooking appliance.

[0111] Other components and operations of the cooking appliance according to an embodiment of the present invention are known to those of ordinary skill in the art and will not be described in detail here.

[0112] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0113] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An inlet steam structure, characterized in that, it includes: a box body, having a cooking cavity therein; a damping plate, which is arranged in the cooking cavity and is configured to reduce the flow velocity of the flowing steam; a steam nozzle, which faces the damping plate; a plurality of protrusions spaced apart are formed on one side surface of the damping plate facing the steam nozzle; the plurality of protrusions are spaced apart along the length direction of the damping plate, and each protrusion extends along the width direction of the damping plate.

2. The inlet steam structure according to claim 1, characterized in that, the plurality of protrusions are arranged in an array on the damping plate.

3. The inlet steam structure according to claim 1, characterized in that, the damping plate is a corrugated plate.

4. The inlet steam structure according to claim 1, characterized in that, the damping plate includes a plurality of broken lines with a V-shaped cross-section.

5. The inlet steam structure according to claim 1, characterized in that, a damping surface for reducing the steam flow velocity is formed on one side surface of the damping plate facing the steam nozzle through surface treatment.

6. The inlet steam structure according to claim 1, characterized in that, the damping plate is formed on the top wall of the cooking cavity.

7. The inlet steam structure according to claim 1, characterized in that, the steam nozzle is arranged on the side wall of the cooking cavity.

8. The inlet steam structure according to claim 7, characterized in that, the steam nozzle is located at the upper part of the side wall of the cooking cavity.

9. The inlet steam structure according to claim 7, characterized in that, the steam nozzle extends obliquely upward from the outside to the inside.

10. The inlet steam structure according to claim 1, characterized in that, there are a plurality of steam nozzles, which are spaced apart on the cooking cavity.

11. The inlet steam structure according to claim 10, characterized in that, there are two steam nozzles, which are respectively located on the two side walls of the cooking cavity.

12. A cooking appliance, characterized in that, it includes the inlet steam structure according to any one of claims 1-11.

13. The cooking appliance according to claim 12, characterized in that, the cooking appliance is a steam cooking appliance.

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