Exhaust structure and cooking equipment

Abstract

The invention 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] The present application relates to the technical field of cooking appliances, and in particular to an exhaust structure and a cooking device. Background Art

[0002] Currently, cooking devices or steam ovens on the market are provided with one or more exhaust holes on the cover to reduce the pressure inside the cooking cavity and avoid the problem of the cover being pushed out due to the increase of internal pressure of the cooking device due to continuous delivery of steam into the cooking cavity during operation.

[0003] However, if the pressure inside the cooking cavity is consistent with the pressure outside, not only will the food cook slowly, but it will also consume more power resources due to the long time it takes. Therefore, there is a micro-pressure cooking device that achieves selective exhaust of the cavity by setting a movable valve at the exhaust hole, that is, exhaust when the air pressure in the cooking cavity exceeds a certain value, and do not exhaust when the air pressure is lower than a certain value, so that the cooking cavity always maintains a certain pressure.

[0004] However, when the micro-pressure cooking device uses high power to cook food in the cooking chamber, due to the high power of the micro-pressure cooking device, the liquid in the cooking chamber will continue to be in a state of violent boiling, continuously generating a large amount of steam, and the steam continuously impacts the movable valve, thereby generating a lot of noise, affecting the user experience. Summary of the invention

[0005] Based on this, it is necessary to provide an exhaust structure and cooking equipment to address the problem that micro-pressure cooking equipment can generate relatively loud noise.

[0006] An exhaust structure comprising:

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

[0008] A micro-pressure piece is disposed at the exhaust outlet, and when the air pressure at the exhaust outlet is less than or equal to a threshold value, the micro-pressure piece blocks the exhaust outlet, and when the air pressure at the exhaust outlet is greater than the threshold value, the micro-pressure piece opens the exhaust outlet;

[0009] The silencer is arranged at the exhaust inlet and is used for silencing the gas entering the exhaust inlet.

[0010] In one embodiment, a plurality of silencer ports are provided on the surface of the silencer, all of the silencer ports are spaced apart from each other, each of the silencer ports is connected to the exhaust inlet, and the gas flow area of ​​each of the silencer ports is smaller than the gas flow area of ​​the exhaust inlet.

[0011] In one embodiment, all of the silencer ports are disposed at an end of the silencer component away from the exhaust inlet, and each of the silencer ports is a silencer slit extending longitudinally along a first direction, and all of the silencer slits are arranged at intervals along a second direction, and the second direction intersects with the first direction.

[0012] In one of the embodiments, in the second direction, the width of each sound-absorbing slot is less than 2 mm.

[0013] In one of the embodiments, the sum of the gas flow areas of all the noise reduction slots is greater than or equal to the gas flow area of ​​the exhaust inlet.

[0014] In one of the embodiments, a silencer hole is provided on the silencer, and one end of the exhaust member having the exhaust inlet is inserted into the silencer hole, and the silencer hole is connected to all the silencer slits.

[0015] In one of the embodiments, the inner wall of the muffler hole is provided with an internal thread, and the exhaust member is provided with an external thread, and the external thread can be matched with the internal thread.

[0016] In one of the embodiments, at least one of the silencer seams includes an air inlet portion and an anti-blocking portion in sequence along a first direction, the air inlet portion is arranged on an end surface of the silencer away from the exhaust inlet, and the anti-blocking portion is located on the circumferential side wall of the silencer.

[0017] In one embodiment, the exhaust member includes an exhaust channel, and the exhaust channel is connected to the exhaust inlet and the exhaust outlet respectively;

[0018] The gas flow area of ​​the exhaust outlet is smaller than the gas flow area of ​​the exhaust inlet, and the diameter of the exhaust passage gradually decreases in a 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 is provided with the exhaust outlet. The insert is provided on the exhaust body and is provided with the exhaust channel and the exhaust inlet.

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

[0021] In one of the embodiments, the micro-pressure member is disposed on the exhaust member and is capable of blocking the exhaust outlet under the action of its own gravity.

[0022] In one embodiment, the exhaust member is provided with a plurality of limit portions protruding from one end of the exhaust outlet, all of which are arranged at circumferential intervals around the exhaust outlet, and the micro-pressure member is arranged between the plurality of limit portions.

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

[0024] In a direction from the first end to the second end, a height of the limiting portion gradually increases.

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

[0026] A cooking device comprises a cooking cavity and the cooking device according to any one of claims 1 to 9, wherein the exhaust inlet is connected to the cooking cavity, and the exhaust outlet is located outside the cooking cavity.

[0027] In one embodiment, the cooking device includes a pot body and a cover body, the cover body is covered on the pot body, the cover body and the pot body are arranged to form a cooking cavity, the exhaust member is arranged on the cover body, and the silencer is arranged on the exhaust member and is located in the cooking cavity.

[0028] In one embodiment, the cooking device is provided with a limiting cavity and an air outlet connected to the limiting cavity, one end of the exhaust member having the exhaust outlet is located in the limiting cavity, and the micro-pressure member is located in the limiting cavity.

[0029] In the above exhaust structure, when the pressure in the cooking cavity reaches the rated pressure, the steam pushes the micro-pressure piece open. At this time, a large amount of steam needs to be ejected from the exhaust outlet at high speed. The fluctuating movement of the ejected airflow generates a wide-band exhaust noise with a significant peak. According to actual tests, the overall sound power level of the cooking equipment is above dB, which causes interference to the user. For this reason, the silencer is arranged at the exhaust inlet and is used to silence the gas entering the exhaust inlet, thereby reducing the noise generated when the gas enters and exits the exhaust piece, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] FIG. 1 is a schematic diagram of the structure of a cooking device in some embodiments of the present application.

[0031] FIG. 2 is a schematic structural diagram of a cover body of the cooking device in the embodiment of FIG. 1 .

[0032] FIG. 3 is a cross-sectional schematic diagram of the cover of the cooking device in the embodiment of FIG. 1 .

[0033] FIG. 4 is a detailed view of point A in FIG. 3 .

[0034] FIG. 5 is a schematic diagram of the structure of a sound-absorbing component in some embodiments of the present application.

[0035] FIG. 6 is a schematic structural diagram of the sound-absorbing member in the embodiment of FIG. 5 at another viewing angle.

[0036] FIG. 7 is a schematic diagram of the structure of an exhaust component in some embodiments of the present application.

[0037] Description of reference numerals:

[0038] Pot body 100; cover body 200; limiting cavity 210; air outlet 220; cooking cavity 300;

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

[0040] Micro-pressure parts 20;

[0041] Silence member 30; silencer port 31; silencer slot 32; silencer hole 33; internal thread 34; air inlet portion 35; anti-blocking portion 36. DETAILED DESCRIPTION

[0042] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0043] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0044] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0045] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0046] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0047] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, 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 implementation method.

[0048] Referring to FIG. 1 , FIG. 1 shows a schematic diagram of the structure of a cooking device in an embodiment of the present application. The cooking device provided in an embodiment of the present application includes a cooking cavity 300 and an exhaust structure. The cooking cavity 300 is used to cook food. A large amount of steam is generated during the cooking process of food. The exhaust structure is connected to the cooking cavity 300, so that the steam accumulated in the cooking cavity 300 is discharged through the exhaust structure to prevent the steam from accumulating in the cooking cavity 300 and causing excessive pressure in the cooking cavity 300, thereby damaging the cooking device.

[0049] Among them, referring to Figure 2, Figure 3 and Figure 4, the exhaust structure includes an exhaust component 10, a micro-pressure component 20 and a silencer 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 cavity 300, and the exhaust outlet 12 is located outside the cooking cavity 300. The steam generated by the cooking cavity 300 enters the exhaust outlet 12 through the exhaust inlet 11, and is finally discharged from the outside of the cooking cavity 300 through the exhaust outlet 12.

[0050] The micro-pressure member 20 is disposed at the exhaust outlet 12, and when the air pressure of the exhaust outlet 12 is less than or equal to a threshold value, the micro-pressure member 20 blocks the exhaust outlet 12, and when the air pressure of the exhaust outlet 12 is greater than the threshold value, the micro-pressure member 20 opens the exhaust outlet. In this way, the air pressure in the cooking cavity 300 can be maintained within the rated pressure range through the micro-pressure member 20. In actual use, the air pressure in the cooking cavity 300 can be slightly greater than the atmospheric pressure through the micro-pressure member 20, thereby increasing the boiling point of the water in the cooking cavity 300, and further allowing the food in the cooking cavity 300 to be quickly cooked, thereby achieving the effect of reducing the cooking time.

[0051] Specifically, the micro-pressing member 20 is disposed on the exhaust member 10, and can block the exhaust outlet 12 under the action of its own gravity, that is, when the cooking device is in use, the micro-pressing member 20 is disposed above the exhaust outlet 12, and when no cooking is performed in the cooking cavity 300, the micro-pressing member 20 is not subjected to other external forces in the gravity direction, and the micro-pressing member 20 can block the exhaust outlet 12. Optionally, the micro-pressing member 20 is a sphere, so that the surface of the micro-pressing member 20 can be easily fitted to the edge of the exhaust outlet 12, thereby blocking the exhaust outlet 12.

[0052] When cooking begins in the cooking cavity 300, since the micro-pressure piece 20 blocks the exhaust outlet 12, the gas pressure in the cooking cavity 300 will gradually increase until the gas pressure in the cooking cavity 300 rises to a level greater than the gravity of the micro-pressure piece 20. The gas will lift the micro-pressure piece 20, thereby opening the exhaust outlet 12, and the excess steam in the cooking cavity 300 will be discharged from the cooking cavity 300 through the exhaust outlet 12, thereby keeping the pressure in the cooking cavity 300 within a preset range.

[0053] It is understandable that when the micro-pressure member 20 blocks the exhaust outlet 12 by gravity, the threshold value is the gravity of the micro-pressure member 20. In some other embodiments, the micro-pressure member 20 can also be pressed against the exhaust outlet 12 by elastic members such as springs, so that the threshold value is the elastic force applied to the micro-pressure member 20 by the elastic member.

[0054] In actual use, when the pressure in the cooking cavity 300 reaches the rated pressure, the steam pushes the micro-pressure piece 20 away. At this time, a large amount of steam needs to be ejected from the exhaust outlet 12 at high speed. The undulating movement of the ejected airflow generates a wide-band exhaust noise with a significant peak. According to actual tests, the overall sound power level of the cooking device is above 55dB, which causes interference to the user. For this reason, the silencer 30 is arranged at the exhaust inlet 11, and is used to silence the gas entering the exhaust inlet 11, thereby reducing the noise generated when the gas enters and exits the exhaust piece 10, thereby improving the user experience.

[0055] Among them, the silencer 30 can be made by using sound-absorbing materials, such as porous sound-absorbing panels, or foam plastics made of resonance materials, etc., or it can be silenced by using existing resistive silencers, reactive silencers, impedance composite silencers, micro-perforated plate silencers, small hole silencers, active silencers and other silencers.

[0056] In some embodiments of the present application, referring to FIG. 5 and FIG. 6 , a plurality of silencer ports 31 are provided on the surface of the silencer 30, and the plurality of silencer ports 31 are arranged at intervals from each other, and each silencer port 31 is connected to the exhaust inlet 11, and the air flow area of ​​each silencer port 31 is smaller than the air flow area of ​​the exhaust inlet 11. The gas flow areas of the silencer ports 31, the exhaust inlet 11, and the exhaust outlet 12 refer to their respective cross-sectional areas.

[0057] According to the small hole silencer theory, under the same airflow area, when the airflow passes through a small hole or a small slit, the spectrum of the exhaust noise will shift to high frequency or ultra-high frequency, reducing the audible audio frequency component, thereby reducing the subjective loudness. To this end, when the steam passes through the multiple silencer ports 31, since the airflow area of ​​each silencer port 31 is smaller than the exhaust inlet 11, the noise generated by the steam shifts to high frequency or ultra-high frequency, thereby reducing the decibel of noise that the user can hear.

[0058] Each silencer port 31 may be a small circular hole or a long narrow slit. Specifically, in some embodiments, all silencer ports 31 are disposed on one end of the silencer 30 away from the exhaust inlet 11, and each silencer port 31 is a silencer slit 32 extending longitudinally along the first direction, and all silencer slits 32 are arranged at intervals along the second direction, and the second direction intersects the first direction. In this way, when steam passes through a plurality of silencer slits 32, the noise generated by the steam is moved to high frequency or ultra-high frequency through the long narrow slit, achieving a silencer effect.

[0059] Specifically in the embodiment of FIG. 3 , the first direction is perpendicular to the paper surface, and the second direction is the left-right direction.

[0060] Furthermore, in order to ensure the silencing effect of each silencing slit 32, the width of each silencing slit 32 in the second direction is less than 2 mm. In addition, the sum of the airflow areas of all the silencing slits 32 is greater than or equal to the airflow area of ​​the exhaust inlet 11, thereby ensuring that the steam can normally pass through all the silencing slits 32 and enter the exhaust inlet 11, avoiding the airflow turbulence of the steam at the silencing slit 32, which not only affects the exhaust effect, but also causes additional noise.

[0061] In some embodiments, in order to make the total area of ​​all the silencer slits 32 as large as possible, a silencer hole 33 is provided on the silencer 30, and one end of the exhaust member 10 having the exhaust inlet 11 is inserted into the silencer hole 33, and the silencer hole 33 is connected with all the silencer slits 32. That is, the silencer hole 33 enables the silencer 30 to include the end of the exhaust member 10 having the exhaust inlet 11, so that the end surface area of ​​the silencer 30 is larger than the area of ​​the exhaust inlet 11, so that the silencer 30 can have a larger area to set the silencer slits 32, and then the total area of ​​all the silencer slits 32 can be as large as possible.

[0062] Specifically in some embodiments, the inner wall of the muffler hole 33 is provided with an internal thread 34, and the exhaust member 10 is provided with an external thread 13, and the external thread 13 can be threadedly matched with the internal thread 34, so that the muffler 30 can be fixed on the exhaust member 10 through the matching of the internal thread 34 and the external thread 13. It can be understood that in other embodiments, the muffler 30 may not be provided on the exhaust member 10, for example, it may be fixed separately on other components of the cooking device.

[0063] In actual use, when cooking food in the cooking cavity 300, the food will roll violently in the cooking cavity 300, causing part of the food to move with the steam in the cooking cavity 300, and finally move with the steam to the silencer slot 32, and finally cause the food to block the silencer slot 32, affecting the exhaust effect of the cooking device. Especially when cooking food containing bean skins such as mung beans and soybeans, the bean skins are easily detached from the food and move with the steam into the silencer slot 32, causing the silencer slot 32 to be blocked.

[0064] To this end, in some embodiments, at least one muffler slit 32 includes an air inlet 35 and an anti-blocking portion 36 in sequence along a first direction (i.e., the longitudinal direction of the muffler slit 32 itself), the air inlet 35 being disposed on the end surface of the end of the muffler 30 away from the exhaust inlet 11, and the anti-blocking portion 36 being disposed on the circumferential side wall of the muffler 30, that is, the entire muffler slit 32 extends from the end surface of the muffler 30 to the side surface of the muffler 30. Since the air inlet 35 is directly facing the food in the cooking cavity 300, when ingredients such as bean curd enter the muffler slit 32 along with steam, the bean curd will first block the air inlet 35, and at this time, the steam will enter the exhaust inlet 11 through the anti-blocking portion 36 located on the side wall of the muffler 30, that is, the entire air inlet slit is prevented from being completely blocked by the anti-blocking portion 36, thereby ensuring normal exhaust.

[0065] Optionally, all the sound-absorbing slits 32 include an air inlet portion 35 and two anti-blocking portions 36, the two anti-blocking portions 36 are respectively provided at both ends of the air inlet portion 35 in the first direction, and each anti-blocking portion 36 is located on the circumferential side wall of the sound-absorbing member 30. It is understandable that in other embodiments, only some of the sound-absorbing slits 32 may be provided with the anti-blocking portions 36, and the other sound-absorbing slits 32 may only be provided with the air inlet portion 35.

[0066] Specifically in some embodiments, referring to FIG. 7 , the exhaust inlet 11 and the exhaust outlet 12 are arranged vertically, and the exhaust outlet 12 is located above the exhaust inlet 11. The air flow area of ​​the exhaust inlet 11 is larger than the gas flow area of ​​the exhaust outlet 12. When the steam enters the exhaust outlet 12 from the exhaust inlet 11, the area of ​​the exhaust outlet 12 suddenly decreases, and therefore the steam will generate turbulence at the exhaust outlet 12, resulting in an increase in the amplitude of the noise and an increase in the loudness.

[0067] To this end, the exhaust member 10 includes an exhaust channel 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 the airflow area 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. That is, the exhaust channel 14 is in a cone shape, and through the cone-shaped exhaust channel 14, the steam will not have a sudden change in the flow area when entering from the exhaust inlet 11 to the exhaust outlet 12, thereby reducing the turbulence of the steam airflow and reducing the amplitude of the exhaust noise. Through experimental verification, after the sound-absorbing seam 32 and the cone-shaped exhaust channel 14 are provided at the same time, the noise of the cooking equipment is reduced from 55dB to below 47dB during exhaust.

[0068] Specifically in some embodiments, the exhaust component 10 includes an exhaust body 15 and an insert 16. An external thread 13 is provided on the outer surface of the exhaust body 15, 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 arranged on the exhaust body 15, and is provided with an exhaust channel 14 and an exhaust inlet 11. The diameter of one end of the exhaust channel 14 close to the exhaust outlet 12 is the same as the diameter of the exhaust outlet 12 to avoid a sudden change in diameter.

[0069] Due to the existence of the exhaust channel 14, the wall thickness of the insert 16 is uneven, while the wall thickness of the plastic product should be uniform, so the exhaust body 15 is a plastic part and the insert 16 is a metal part. Before the exhaust body 15 is produced by injection molding, the insert 16 is placed in the plastic mold of the exhaust body 15, and after the injection molding is completed, the exhaust body 15 will be nested with the insert 16.

[0070] In some embodiments of the present application, in order to support and limit the micro-pressure member 20, one end of the exhaust member 10 provided with the exhaust outlet 12 is protruded with a plurality of limiting portions 17, all of which are radially arranged at intervals around the circumference of the exhaust outlet 12, and the micro-pressure member 20 is arranged between the plurality of limiting portions 17, so that the circumference of the micro-pressure member 20 is limited by the plurality of limiting portions 17. In this way, even if the micro-pressure member 20 is affected by the airflow ejected from the exhaust outlet 12, resulting in the separation of the micro-pressure member 20 from the exhaust outlet 12, the micro-pressure member 20 can only move between the plurality of limiting portions 17, so that when the airflow ejected from the exhaust outlet 12 slows down or stops ejecting the airflow, the micro-pressure member 20 can return to the exhaust outlet 12 under the action of gravity and block the exhaust outlet 12.

[0071] Further, in the radial direction of the exhaust outlet 12, each limiting portion 17 includes a first end and a second end opposite to each other, and 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. In the direction from the first end to the second end, the height of the limiting portion 17 gradually increases, so that the limiting portion 17 forms a guide slope 18 on the side facing the exhaust outlet 12. When the airflow ejected from the exhaust outlet 12 slows down or stops ejecting the airflow, the spherical micro-pressure piece 20 can move toward the exhaust outlet 12 under the action of the guide slope 18 until the micro-pressure piece 20 blocks the exhaust outlet 12.

[0072] Furthermore, the cooking device is provided with a limiting cavity 210 and an air outlet 220 connected to the limiting cavity 210, the exhaust outlet 12 is connected to the limiting cavity 210, one end of the exhaust member 10 having the exhaust outlet 12 is located in the limiting cavity 210, and the micro-pressure member 20 is located in the limiting cavity 210. In this way, the movement of the micro-pressure member 20 in the vertical direction is limited by the limiting cavity 210, so as to prevent the micro-pressure member 20 from moving too high, so that the micro-pressure member 20 cannot return to the state of blocking the exhaust outlet 12.

[0073] Among them, the gas discharged from the exhaust outlet 12 pushes the micro-pressure part 20 to move and then will be discharged from the outlet 220. The outlet 220 is arranged on the circumferential side wall of the limiting cavity 210 to prevent the micro-pressure part 20 from blocking the outlet 220. At the same time, the top wall of the limiting cavity 210 can limit the movement of the micro-pressure part 20 to prevent the micro-pressure part 20 from moving too high.

[0074] In some embodiments of the present application, the cooking device includes a pot body 100 and a cover body 200, the cover body 200 is covered on the pot body 100, the cover body 200 and the pot body 100 together form a cooking cavity 300, the exhaust member 10 is provided on the cover body 200, and the muffler 30 is provided on the exhaust member 10, so that each muffler port 31 on the muffler 30 is connected to the exhaust cavity. The cover body 200 is also provided with the above-mentioned air outlet 220 and the limiting cavity 210. Optionally, the cooking device is an electric rice cooker, and in some other embodiments, the cooking device can also be a voltage cooker, an electric steamer, etc.

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

[0076] When the pressure in the cooking cavity 300 reaches the rated pressure, the steam pushes the micro-pressure piece 20 away. At this time, a large amount of steam needs to be ejected from the exhaust outlet 12 at high speed. The undulating motion of the ejected airflow generates a broadband exhaust noise with a significant peak. According to actual tests, the overall sound power level of the cooking device is above 55dB, which causes interference to the user. For this reason, the silencer 30 is arranged at the exhaust inlet 11 and is used to silence the gas entering the exhaust inlet 11, thereby reducing the noise generated when the gas enters and exits the exhaust piece 10, thereby improving the user experience.

[0077] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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 above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An exhaust structure, characterized in that: The exhaust structure comprises: An exhaust member (10) having an exhaust inlet (11) and an exhaust outlet (12) which are connected to each other; A micro-pressure piece (20) is disposed at the exhaust outlet (12), and when the air pressure at the exhaust outlet (12) is less than or equal to a threshold value, the micro-pressure piece (20) blocks the exhaust outlet (12), and when the air pressure at the exhaust outlet (12) is greater than the threshold value, the micro-pressure piece (20) opens the exhaust outlet (12); The silencer (30) is arranged 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: A plurality of silencer ports (31) are provided on the surface of the silencer (30), all of the silencer ports (31) are arranged at intervals from each other, each of the silencer ports (31) is connected to the exhaust inlet (11), and the airflow flow area of ​​each of the silencer ports (31) is smaller than the airflow flow area of ​​the exhaust inlet (11).

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

4. The exhaust structure according to claim 3, characterized in that: In the second direction, the width of each sound-absorbing seam (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 muffler slots (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 silencer (30) is provided with a silencer hole (33), one end of the exhaust member (10) having the exhaust inlet (11) is inserted into the silencer hole (33), and the silencer hole (33) is connected to all the silencer slits (32).

7. The exhaust structure according to claim 6, characterized in that: An internal thread (34) is provided on the inner wall of the muffler hole (33), and an external thread (13) is provided on the exhaust member (10), wherein the external thread (13) can be threadably matched with the internal thread (34).

8. The exhaust structure according to claim 3, characterized in that: At least one of the muffler slots (32) comprises an air inlet portion (35) and an anti-blocking portion (36) in sequence along a first direction; the air inlet portion (35) is arranged on an end surface of the muffler (30) at an end facing away from the exhaust inlet (11); and the anti-blocking portion (36) is located on a circumferential side wall of the muffler (30).

9. The exhaust structure according to claim 1, characterized in that: The exhaust member (10) comprises an exhaust channel (14), wherein the exhaust channel (14) is respectively connected to the exhaust inlet (11) and the exhaust outlet (12); The air flow area of ​​the exhaust outlet (12) is smaller than the air flow area 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) comprises an exhaust body (15) and an insert (16), wherein the exhaust body (15) is provided with the exhaust outlet (12), and the insert (16) is arranged 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 a plastic part, and the insert (16) is a metal part.

12. The exhaust structure according to claim 1, characterized in that: The micro-pressure component (20) is arranged on the exhaust component (10) and is capable of blocking the exhaust outlet (12) under the action of its own gravity.

13. The exhaust structure according to claim 12, characterized in that: One end of the exhaust member (10) provided with the exhaust outlet (12) is protruded with a plurality of limit portions (17), all of the limit portions (17) are arranged at intervals in the circumferential direction around the exhaust outlet (12), and the micro-pressure member (20) is arranged between the plurality of limit portions (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) comprises a first end and a second end opposite to each other, 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); In the direction from the first end to the second end, the height of the limiting portion (17) gradually increases.

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

16. A cooking device, characterized in that: It comprises a cooking cavity (300) and the cooking device according to any one of claims 1 to 15, wherein the exhaust inlet (11) is connected to the cooking cavity (300), and the exhaust outlet (12) is located outside the cooking cavity (300).

17. The cooking device according to claim 16, characterized in that The cooking device comprises a pot body (100) and a cover body (200); the cover body (200) is arranged on the pot body (100); the cover body (200) and the pot body (100) are arranged to form a cooking cavity (300); the exhaust component (10) is arranged on the cover body (200); and the silencer (30) is arranged on the exhaust component (10) and is located in the cooking cavity (300).

18. The cooking device according to claim 16, characterized in that The cooking device is provided with a limiting cavity (210) and an air outlet (220) connected to the limiting cavity (210); one end of the exhaust member (10) having an exhaust outlet (12) is located in the limiting cavity (210); and the micro-pressure member (20) is located in the limiting cavity (210).

Images