Exhaust structure and cooking equipment

Abstract

The utility model relates to an exhaust structure and cooking equipment, and the exhaust structure comprises an exhaust part which is provided with an exhaust inlet and an exhaust outlet which are communicated with each other; the micro-pressure part is arranged at the exhaust outlet, when the air pressure of the exhaust outlet is smaller than or equal to a threshold value, the micro-pressure part blocks the exhaust outlet, and when the air pressure of the exhaust outlet is larger than the threshold value, the micro-pressure part opens the exhaust outlet; and the silencing part is arranged at the exhaust inlet and is used for carrying out silencing treatment on gas entering the exhaust inlet. The silencing part is arranged at the exhaust inlet and used for conducting silencing treatment on the gas entering the exhaust inlet, so that noise generated when the gas enters the exhaust part and is exhausted out of the exhaust part is reduced, and the use experience of a user is improved.

Description

Technical Field

[0001] This application relates to the field of cooking appliance technology, and in particular to an exhaust structure and cooking equipment. Background Technology

[0002] Most cooking appliances or steam ovens on the market have one or more vents on the lid to reduce the pressure inside the cooking cavity and prevent the lid from being pushed out due to increased internal pressure caused by the continuous supply of steam during operation.

[0003] However, if the pressure inside the cooking chamber is the same as the external pressure, not only will the food cook more slowly, but the longer cooking time will also result in greater power consumption. Therefore, there is a micro-pressure cooking device that uses a movable valve at the vent to achieve selective venting of the chamber. That is, venting occurs when the pressure inside the cooking chamber exceeds a certain value, and venting does not occur when the pressure is below a certain value, so that the cooking chamber always maintains a certain pressure.

[0004] However, when a micro-pressure cooking device uses high power to cook food in the cooking chamber, the liquid inside the cooking chamber will continuously boil violently due to the high power of the micro-pressure cooking device, constantly generating a large amount of steam. The steam constantly impacts the active valve, thus generating a lot of noise and affecting the user experience. Utility Model Content

[0005] Therefore, it is necessary to provide an exhaust structure and cooking device to address the problem of excessive noise generated by micro-pressure cooking equipment.

[0006] An exhaust structure, comprising:

[0007] An exhaust system having an exhaust inlet and an exhaust outlet that are interconnected;

[0008] A micro-pressure element is disposed at the exhaust outlet. When the air pressure at the exhaust outlet is less than or equal to a threshold, the micro-pressure element blocks the exhaust outlet. When the air pressure at the exhaust outlet is greater than the threshold, the micro-pressure element opens the exhaust outlet.

[0009] A silencer is provided at the exhaust inlet and is used to silence the gas entering the exhaust inlet.

[0010] In one embodiment, a plurality of muffler openings are formed on the surface of the muffler, all of which are spaced apart from each other. Each muffler opening is connected to the exhaust inlet, and the gas flow area of ​​each muffler opening is smaller than the gas flow area of ​​the exhaust inlet.

[0011] In one embodiment, all the muffler openings are located at the end of the muffler that is away from the exhaust inlet, and each of the muffler openings is a muffler slit extending longitudinally along a first direction. All the muffler slits are spaced apart along a second direction, which intersects with the first direction.

[0012] In one embodiment, in the second direction, the width of each silencing slit is less than 2 mm.

[0013] In one embodiment, the sum of the gas flow areas of all the silencing slits is greater than or equal to the gas flow area of ​​the exhaust inlet.

[0014] In one embodiment, the muffler has a muffler hole, and the exhaust component has one end with the exhaust inlet inserted into the muffler hole, which is connected to all the muffler seams.

[0015] In one embodiment, the inner wall of the silencing hole is provided with an internal thread, and the exhaust component is provided with an external thread, which can be threaded with the internal thread.

[0016] In one embodiment, at least one of the muffler seams sequentially includes an air intake portion and an anti-clogging portion along a first direction. The air intake portion is disposed on the end face of the muffler opposite to the exhaust inlet, and the anti-clogging portion is located on the circumferential sidewall of the muffler.

[0017] In one embodiment, the exhaust component includes an exhaust passage that connects the exhaust inlet and the exhaust outlet respectively;

[0018] The gas flow area of ​​the exhaust outlet is smaller than that of the exhaust inlet, and the diameter of the exhaust channel gradually decreases in the direction from the exhaust inlet to the exhaust outlet.

[0019] In one embodiment, the exhaust component includes an exhaust body and an insert. The exhaust body has an exhaust outlet, and the insert is disposed on the exhaust body and has an exhaust channel and an exhaust inlet.

[0020] In one embodiment, the exhaust body is a plastic part and the insert is a metal part.

[0021] In one embodiment, the micro-pressure element is disposed on the exhaust element and can block the exhaust outlet under its own weight.

[0022] In one embodiment, the exhaust component has a plurality of limiting portions protruding from one end where the exhaust outlet is located, and all the limiting portions are circumferentially spaced around the exhaust outlet, with the micro-pressure component disposed between the plurality of limiting portions.

[0023] In one embodiment, in the radial direction of the exhaust outlet, each of the limiting portions includes an opposing first end and a second end, wherein the distance between the second end and the exhaust outlet is greater than the distance between the first end and the exhaust outlet;

[0024] The height of the limiting portion gradually increases in the direction from the first end to the second end.

[0025] In one embodiment, the micro-pressure element is a sphere.

[0026] A cooking apparatus includes a cooking chamber and a cooking device as described in any of the preceding claims, wherein the exhaust inlet communicates with the cooking chamber and the exhaust outlet is located outside the cooking chamber.

[0027] In one embodiment, the cooking device includes a pot body and a lid, the lid being placed on the pot body, the lid and the pot body forming a cooking cavity, the exhaust vent being placed on the lid, and the silencer being placed on the exhaust vent and located inside the cooking cavity.

[0028] In one embodiment, the cooking device has a limiting cavity and an air outlet communicating with the limiting cavity, the exhaust component having an exhaust outlet at one end located in the limiting cavity, and the micro-pressure component located in the limiting cavity.

[0029] In the aforementioned exhaust structure, when the pressure inside the cooking chamber reaches the rated pressure, the steam pushes open the micro-pressure component. At this point, a large amount of steam needs to be ejected at high speed from the exhaust outlet. The undulating motion of the ejected airflow generates broadband exhaust noise with a significant peak. Actual testing showed that the overall sound power level of the cooking equipment exceeded dB, causing interference for the user. Therefore, a silencer is installed at the exhaust inlet to reduce the noise generated when gas enters and exits the exhaust system, thereby improving the user experience. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the cooking device in some embodiments of this application.

[0031] Figure 2 for Figure 1 A schematic diagram of the structure of the lid of the cooking device in the embodiment.

[0032] Figure 3 for Figure 1 A cross-sectional view of the lid of the cooking device in the embodiment.

[0033] Figure 4 for Figure 3 Detailed view of point A in the middle.

[0034] Figure 5 This is a schematic diagram of the structure of the muffler in some embodiments of this application.

[0035] Figure 6 for Figure 5 A schematic diagram of the silencing component in the embodiment from another perspective.

[0036] Figure 7 This is a schematic diagram of the exhaust component in some embodiments of this application.

[0037] Explanation of reference numerals in the attached figures:

[0038] Pot body 100; lid 200; limiting cavity 210; vent 220; cooking cavity 300;

[0039] Exhaust component 10; exhaust inlet 11; exhaust outlet 12; external thread 13; exhaust channel 14; exhaust body 15; insert 16; limiting part 17; guide slope 18;

[0040] Micro-pressure component 20;

[0041] Silencing component 30; silencing port 31; silencing slot 32; silencing hole 33; internal thread 34; air inlet 35; anti-blocking part 36. Detailed Implementation

[0042] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0043] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0044] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0046] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0048] See Figure 1 , Figure 1A schematic diagram of a cooking device according to an embodiment of this application is shown. The cooking device provided in this embodiment includes a cooking chamber 300 and an exhaust structure. The cooking chamber 300 is used for cooking food. During the cooking process, a large amount of steam is generated. The exhaust structure is connected to the cooking chamber 300, thereby venting the steam accumulated in the cooking chamber 300 and preventing excessive pressure caused by steam buildup, which could damage the cooking device.

[0049] See section 2. Figure 3 and Figure 4 The exhaust structure in the figure includes an exhaust component 10, a micro-pressure component 20, and a silencer component 30. The exhaust component 10 has an exhaust inlet 11 and an exhaust outlet 12 that are interconnected. The exhaust inlet 11 is interconnected with the cooking chamber 300, and the exhaust outlet 12 is located outside the cooking chamber 300. The steam generated in the cooking chamber 300 enters the exhaust outlet 12 through the exhaust inlet 11 and is finally discharged outside the cooking chamber 300 through the exhaust outlet 12.

[0050] A micro-pressure element 20 is located at the exhaust outlet 12. When the air pressure at the exhaust outlet 12 is less than or equal to a threshold, the micro-pressure element 20 blocks the exhaust outlet 12; when the air pressure at the exhaust outlet 12 is greater than the threshold, the micro-pressure element 20 opens the exhaust outlet. In this way, the micro-pressure element 20 maintains the air pressure within the cooking chamber 300 within the rated pressure range. In actual use, the micro-pressure element 20 allows the air pressure within the cooking chamber 300 to be slightly higher than atmospheric pressure, thereby increasing the boiling point of water within the cooking chamber 300 and enabling food within the cooking chamber 300 to cook quickly, thus reducing cooking time.

[0051] Specifically, the micro-pressure component 20 is disposed on the exhaust component 10 and can seal the exhaust outlet 12 under its own weight. That is, during the use of the cooking device, the micro-pressure component 20 is positioned above the exhaust outlet 12, and when no cooking is being carried out in the cooking chamber 300, the micro-pressure component 20 is not subjected to any other external forces in the direction of gravity, and thus can seal the exhaust outlet 12. Optionally, the micro-pressure component 20 is a sphere, so that the surface of the micro-pressure component 20 can easily fit against the edge of the exhaust outlet 12, thereby sealing the exhaust outlet 12.

[0052] When cooking begins in the cooking chamber 300, the gas pressure inside the cooking chamber 300 will gradually increase because the micro-pressure component 20 blocks the exhaust outlet 12. When the gas pressure inside the cooking chamber 300 rises to a level greater than the weight of the micro-pressure component 20, the gas will push the micro-pressure component 20 up, thereby opening the exhaust outlet 12. Excess steam inside the cooking chamber 300 will then be discharged through the exhaust outlet 12, thus keeping the pressure in the cooking chamber 300 within a preset range.

[0053] It is understandable that when the micro-pressure component 20 blocks the exhaust outlet 12 by gravity, the aforementioned threshold is the gravity of the micro-pressure component 20. In some other embodiments, the micro-pressure component 20 can also be pressed against the exhaust outlet 12 by an elastic element such as a spring, in which case the aforementioned threshold is the elastic force applied to the micro-pressure component 20 by the elastic element.

[0054] In actual use, when the pressure inside the cooking cavity 300 reaches the rated pressure, the steam pushes open the micro-pressure component 20. At this time, a large amount of steam needs to be ejected at high speed from the exhaust outlet 12. The undulating motion of the ejected airflow generates broadband exhaust noise with a significant peak. Actual testing shows that the overall sound power level of the cooking equipment is above 55dB, causing interference to the user. To address this, a silencer 30 is installed at the exhaust inlet 11 to silence the gas entering the exhaust inlet 11, thereby reducing the noise generated when the gas enters and exits the exhaust component 10, thus improving the user experience.

[0055] The silencing component 30 can be made by using sound-absorbing materials, such as porous sound-absorbing panels or foam plastics made of resonant materials, or by using existing silencers such as resistive silencers, reactive silencers, impedance composite silencers, micro-perforated plate silencers, small hole silencers, and active silencers.

[0056] In some embodiments of this application, see [reference] Figure 5 and Figure 6 The surface of the muffler 30 has multiple muffler openings 31, which are spaced apart from each other. Each muffler opening 31 is connected to the exhaust inlet 11, and the airflow area of ​​each muffler opening 31 is smaller than the airflow area of ​​the exhaust inlet 11. The gas flow area of ​​the muffler opening 31, the exhaust inlet 11, and the exhaust outlet 12 refers to their respective cross-sectional areas.

[0057] According to the pinhole noise reduction theory, under the same airflow area, when airflow passes through a pinhole or slit, the spectrum of exhaust noise shifts to high or ultra-high frequencies, reducing audible sound frequency components and thus lowering the perceived loudness. Therefore, when steam passes through multiple silencers 31, since the airflow area of ​​each silencer 31 is smaller than the exhaust inlet 11, the noise generated by the steam shifts to high or ultra-high frequencies, thereby reducing the decibel level of noise audible to the user.

[0058] Each silencer opening 31 can be a small circular hole or a narrow, elongated slit. In some specific embodiments, all silencer openings 31 are located on the end of the silencer 30 furthest from the exhaust inlet 11, and each silencer opening 31 is a slit 32 extending longitudinally along a first direction. All slits 32 are spaced apart along a second direction, which intersects with the first direction. Thus, when steam passes through multiple slits 32, the noise generated by the steam is redirected to high or ultra-high frequencies through the narrow, elongated slits, achieving a silencing effect.

[0059] Specifically Figure 3 In the embodiments, the first direction is perpendicular to the paper surface, and the second direction is the left-right direction.

[0060] Furthermore, to ensure the noise reduction effect of each silencing slit 32, the width of each silencing slit 32 in the second direction is less than 2mm. Also, the sum of the airflow areas of all silencing slits 32 is greater than or equal to the airflow area of ​​the exhaust inlet 11, thereby ensuring that steam can pass normally through all silencing slits 32 into the exhaust inlet 11, preventing airflow turbulence at the silencing slits 32, which would not only affect the exhaust effect but also cause additional noise.

[0061] In some embodiments, to maximize the total area of ​​all the noise-absorbing seams 32, a noise-absorbing hole 33 is provided on the noise-absorbing component 30. One end of the exhaust component 10 with the exhaust inlet 11 is inserted into the noise-absorbing hole 33, and the noise-absorbing hole 33 is connected to all the noise-absorbing seams 32. That is, the noise-absorbing hole 33 allows the noise-absorbing component 30 to include the end of the exhaust component 10 with the exhaust inlet 11, thereby making the end face area of ​​the noise-absorbing component 30 larger than the area of ​​the exhaust inlet 11. This allows the noise-absorbing component 30 to have a larger area to accommodate the noise-absorbing seams 32, thus maximizing the total area of ​​all the noise-absorbing seams 32.

[0062] In some specific embodiments, the inner wall of the silencing hole 33 is provided with an internal thread 34, and the exhaust component 10 is provided with an external thread 13. The external thread 13 can be threadedly engaged with the internal thread 34, so that the silencing component 30 can be fixed to the exhaust component 10 through the engagement of the internal thread 34 and the external thread 13. It is understood that in other embodiments, the silencing component 30 may not be provided on the exhaust component 10, for example, it may be fixed separately to other components of the cooking device.

[0063] During actual use, food tumbles violently within the cooking chamber 300, causing some food to move with the steam. This food eventually travels to the sound-absorbing slit 32, clogging it and affecting the exhaust performance of the cooking equipment. This is especially problematic when cooking ingredients with bean skins, such as mung beans and soybeans, as the skins easily detach from the food and move with the steam into the sound-absorbing slit 32, causing blockage.

[0064] Therefore, in some embodiments, at least one silencing slit 32 includes an air intake 35 and an anti-blocking part 36 sequentially along a first direction (i.e., the longitudinal direction of the silencing slit 32 itself). The air intake 35 is located on the end face of the silencing member 30 away from the exhaust inlet 11, and the anti-blocking part 36 is located on the circumferential sidewall of the silencing member 30. That is, the entire silencing slit 32 extends from the end face of the silencing member 30 to the side face of the silencing member 30. Since the air intake 35 faces the food in the cooking cavity 300, when ingredients such as bean curd sheets enter the silencing slit 32 with steam, the bean curd sheets will preferentially block the air intake 35. At this time, the steam will enter the exhaust inlet 11 through the anti-blocking part 36 located on the sidewall of the silencing member 30. That is, the anti-blocking part 36 prevents the entire air intake slit from being completely blocked, ensuring normal exhaust.

[0065] Optionally, all noise-reducing seams 32 include an air intake 35 and two anti-clogging portions 36. The two anti-clogging portions 36 are respectively disposed at both ends of the air intake 35 in the first direction, and each anti-clogging portion 36 is located on the circumferential sidewall of the noise-reducing component 30. It is understood that in other embodiments, only some noise-reducing seams 32 may be provided with anti-clogging portions 36, while other noise-reducing seams 32 may only be provided with air intake portions 35.

[0066] Specifically, in some embodiments, see [link to relevant documentation]. Figure 7 The exhaust inlet 11 and the exhaust outlet 12 are arranged vertically, with the exhaust outlet 12 located above the exhaust inlet 11. The airflow area of ​​the exhaust inlet 11 is larger than the gas flow area of ​​the exhaust outlet 12. As steam enters the exhaust outlet 12 from the exhaust inlet 11, the area of ​​the exhaust outlet 12 suddenly decreases, causing the steam to become turbulent at the exhaust outlet 12, resulting in an increase in the amplitude and loudness of the noise.

[0067] Therefore, the exhaust component 10 includes an exhaust channel 14, which connects the exhaust inlet 11 and the exhaust outlet 12. The airflow area of ​​the exhaust outlet 12 is smaller than that of the exhaust inlet 11, and the diameter of the exhaust channel 14 gradually decreases from the exhaust inlet 11 to the exhaust outlet 12. That is, the exhaust channel 14 is conical. This conical shape prevents abrupt changes in the flow area of ​​steam as it enters the exhaust outlet 12 from the exhaust inlet 11, thus reducing the turbulence of the steam flow and lowering the amplitude of the exhaust noise. Experiments have verified that with the sound-absorbing slit 32 and the conical exhaust channel 14 installed, the noise level of the cooking equipment during exhaust has decreased from 55 dB to below 47 dB.

[0068] In some specific embodiments, the exhaust component 10 includes an exhaust body 15 and an insert 16. The outer surface of the exhaust body 15 is provided with an external thread 13, so that the muffler 30 is installed on the exhaust body 15 through the external thread 13. The exhaust body 15 is provided with an exhaust outlet 12. The insert 16 is provided on the exhaust body 15 and is provided with an exhaust channel 14 and an exhaust inlet 11. The diameter of the end of the exhaust channel 14 near the exhaust outlet 12 is the same as the diameter of the exhaust outlet 12 to avoid abrupt changes in diameter.

[0069] Due to the presence of the venting channel 14, the wall thickness of the insert 16 is uneven, while the wall thickness of plastic products must be uniform. Therefore, the venting body 15 is made of plastic, and the insert 16 is made of metal. Before injection molding, the insert 16 is placed into the plastic mold of the venting body 15. After injection molding is completed, the venting body 15 and the insert 16 will be nested together.

[0070] In some embodiments of this application, in order to support and limit the micro-pressure component 20, the exhaust component 10 has a plurality of limiting parts 17 protruding from one end where the exhaust outlet 12 is provided. All the limiting parts 17 are arranged radially around the circumferential space of the exhaust outlet 12. The micro-pressure component 20 is disposed between the plurality of limiting parts 17, thereby limiting the circumferential space of the micro-pressure component 20 through the plurality of limiting parts 17. In this way, even if the micro-pressure component 20 is affected by the airflow ejected from the exhaust outlet 12, causing the micro-pressure component 20 to separate from the exhaust outlet 12, the micro-pressure component 20 can only move between the plurality of limiting parts 17, so that when the airflow ejected from the exhaust outlet 12 slows down or stops, the micro-pressure component 20 can return to the exhaust outlet 12 under the action of gravity and block the exhaust outlet 12.

[0071] Furthermore, in the radial direction of the exhaust outlet 12, each limiting portion 17 includes a first end and a second end, the distance between the second end and the exhaust outlet 12 being greater than the distance between the first end and the exhaust outlet 12. The height of the limiting portion 17 gradually increases from the first end to the second end, thereby forming a guide slope 18 on the side of the limiting portion 17 facing the exhaust outlet 12. When the airflow from the exhaust outlet 12 slows down or stops, the spherical micro-pressure member 20 can move towards the exhaust outlet 12 under the action of the guide slope 18 until the micro-pressure member 20 blocks the exhaust outlet 12.

[0072] Furthermore, the cooking device includes a limiting cavity 210 and an exhaust port 220 connected to the limiting cavity 210. The exhaust outlet 12 is connected to the limiting cavity 210, and the end of the exhaust component 10 with the exhaust outlet 12 is located within the limiting cavity 210. The micro-pressure component 20 is also located within the limiting cavity 210. In this way, the limiting cavity 210 limits the vertical movement of the micro-pressure component 20, preventing it from moving too high and thus preventing it from restoring its state of blocking the exhaust outlet 12.

[0073] The gas discharged from the exhaust outlet 12 pushes the micro-pressure component 20 to move and then is discharged from the air outlet 220. The air outlet 220 is set on the circumferential side wall of the limiting cavity 210 to prevent the micro-pressure component 20 from blocking the air outlet 220. At the same time, the top wall of the limiting cavity 210 can limit the movement of the micro-pressure component 20 to prevent the movement height of the micro-pressure component 20 from being too high.

[0074] In some embodiments of this application, the cooking device includes a pot body 100 and a lid 200. The lid 200 covers the pot body 100, and the lid 200 and the pot body 100 together form a cooking cavity 300. An exhaust vent 10 is disposed on the lid 200, and a silencer 30 is disposed on the exhaust vent 10, such that each silencer port 31 on the silencer 30 is connected to the exhaust cavity. The lid 200 also has the aforementioned air outlet 220 and a limiting cavity 210. Optionally, the cooking device is a rice cooker; in other embodiments, the cooking device may also be a pressure cooker, an electric steamer, etc.

[0075] The above-mentioned exhaust structure has at least the following advantages:

[0076] When the pressure inside the cooking chamber 300 reaches the rated pressure, the steam pushes open the micro-pressure component 20. At this time, a large amount of steam needs to be ejected at high speed from the exhaust outlet 12. The undulating motion of the ejected airflow generates broadband exhaust noise with a significant peak. Actual testing showed that the overall sound power level of the cooking equipment was above 55dB, causing interference to the user. To address this, a silencer 30 is installed at the exhaust inlet 11 to silence the gas entering the exhaust inlet 11, thereby reducing the noise generated when the gas enters and exits the exhaust component 10, and improving the user experience.

[0077] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An exhaust structure, characterized in that, The exhaust structure includes: The exhaust component (10) has an exhaust inlet (11) and an exhaust outlet (12) that are interconnected. A micro-pressure element (20) is provided at the exhaust outlet (12). When the air pressure at the exhaust outlet (12) is less than or equal to a threshold, the micro-pressure element (20) blocks the exhaust outlet (12). When the air pressure at the exhaust outlet (12) is greater than the threshold, the micro-pressure element (20) opens the exhaust outlet (12). A silencer (30) is provided at the exhaust inlet (11) and is used to silence the gas entering the exhaust inlet (11).

2. The exhaust structure according to claim 1, characterized in that, The silencer (30) has multiple silencer openings (31) on its surface. All the silencer openings (31) are arranged at intervals. Each silencer opening (31) is connected to the exhaust inlet (11), and the airflow area of ​​each silencer opening (31) is smaller than the airflow area of ​​the exhaust inlet (11).

3. The exhaust structure according to claim 2, characterized in that, All of the muffler openings (31) are located at the end of the muffler (30) away from the exhaust inlet (11), and each of the muffler openings (31) is a muffler slit (32) extending longitudinally along a first direction. All of the muffler slits (32) are arranged at intervals along a second direction, which intersects with the first direction.

4. The exhaust structure according to claim 3, characterized in that, In the second direction, the width of each silencing slit (32) is less than 2 mm.

5. The exhaust structure according to claim 3, characterized in that, The sum of the gas flow areas of all the silencing seams (32) is greater than or equal to the gas flow area of ​​the exhaust inlet (11).

6. The exhaust structure according to claim 3, characterized in that, The muffler (30) has a muffler hole (33), and the exhaust component (10) with the exhaust inlet (11) is inserted into the muffler hole (33). The muffler hole (33) is connected to all the muffler seams (32).

7. The exhaust structure according to claim 6, characterized in that, The inner wall of the silencing hole (33) is provided with an internal thread (34), and the exhaust component (10) is provided with an external thread (13), which can be threadedly engaged with the internal thread (34).

8. The exhaust structure according to claim 3, characterized in that, At least one of the noise reduction seams (32) includes an air intake (35) and an anti-blocking part (36) in sequence along a first direction. The air intake (35) is provided on the end face of the noise reduction member (30) away from the exhaust inlet (11), and the anti-blocking part (36) is located on the circumferential sidewall of the noise reduction member (30).

9. The exhaust structure according to claim 1, characterized in that, The exhaust component (10) includes an exhaust passage (14), which is connected to the exhaust inlet (11) and the exhaust outlet (12) respectively. The airflow area of ​​the exhaust outlet (12) is smaller than that of the exhaust inlet (11), and the diameter of the exhaust channel (14) gradually decreases in the direction from the exhaust inlet (11) to the exhaust outlet (12).

10. The exhaust structure according to claim 9, characterized in that, The exhaust component (10) includes an exhaust body (15) and an insert (16). The exhaust body (15) is provided with the exhaust outlet (12). The insert (16) is provided on the exhaust body (15) and is provided with the exhaust channel (14) and the exhaust inlet (11).

11. The exhaust structure according to claim 10, characterized in that, The exhaust body (15) is made of plastic, and the insert (16) is made of metal.

12. The exhaust structure according to claim 1, characterized in that, The micro-pressure component (20) is disposed on the exhaust component (10) and can block the exhaust outlet (12) under its own gravity.

13. The exhaust structure according to claim 12, characterized in that, The exhaust component (10) has a plurality of limiting parts (17) protruding from one end of the exhaust outlet (12). All the limiting parts (17) are arranged circumferentially around the exhaust outlet (12), and the micro pressure component (20) is disposed between the plurality of the limiting parts (17).

14. The exhaust structure according to claim 13, characterized in that, In the radial direction of the exhaust outlet (12), each of the limiting portions (17) includes a first end and a second end opposite to each other, wherein the distance between the second end and the exhaust outlet (12) is greater than the distance between the first end and the exhaust outlet (12); The height of the limiting part (17) gradually increases in the direction from the first end to the second end.

15. The exhaust structure according to claim 1, characterized in that, The micro-pressure component (20) is a sphere.

16. A cooking appliance, characterized in that, Includes a cooking chamber (300) and a cooking apparatus as claimed in any one of claims 1-15, wherein the exhaust inlet (11) is connected to the cooking chamber (300) and the exhaust outlet (12) is located outside the cooking chamber (300).

17. The cooking apparatus according to claim 16, characterized in that, The cooking device includes a pot body (100) and a lid (200). The lid (200) covers the pot body (100), and the lid (200) and the pot body (100) enclose a cooking cavity (300). The exhaust device (10) is located on the lid (200), and the silencer (30) is located on the exhaust device (10) and inside the cooking cavity (300).

18. The cooking apparatus according to claim 16, characterized in that, The cooking device has a limiting cavity (210) and an air outlet (220) connected to the limiting cavity (210). The exhaust component (10) has an exhaust outlet (12) at one end located in the limiting cavity (210), and the micro-pressure component (20) is located in the limiting cavity (210).

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