Pot cover and cooking utensil thereof

Abstract

The pot cover comprises a surface cover, a lining cover and an inner cover, a steam exhaust pipe is arranged on the inner cover, a cold air introduction pipe is arranged on the steam exhaust pipe, the steam exhaust pipe is provided with a steam inlet channel communicated with a cooking cavity and a steam exhaust channel communicated with the steam inlet channel, a steam exhaust port and a cold air inlet are formed in the surface cover, and the cold air inlet is communicated with the steam exhaust channel. The steam exhaust channel is communicated with the outside for steam exhaust through the steam exhaust port, the cold air inlet pipe is communicated with the outside for air inlet through the cold air inlet, and the air outlet end of the cold air inlet pipe is communicated with the steam exhaust channel. Cold air is introduced into the steam exhaust pipe through the cooling inlet in the surface cover, and the anti-overflow purpose is achieved. The utility model further discloses the cooking utensil with the pot cover of the cooking utensil.

Description

Technical Field

[0001] The present application belongs to the technical field of kitchen appliances, and specifically relates to a pot cover and a cooking utensil thereof. Background Art

[0002] As the rice cooker cooks, heat is generated in the cooking chamber, and steam is discharged through the exhaust port of the steam valve located on the lid. When cooking rice porridge or other dishes, a large amount of bubbles are generated during the cooking process. If the cooking power is too high or the cooking temperature is continuously high, the bubbles containing the rice soup will overflow from the exhaust port, which will not only be a burden for the user to clean up. Using a low-power heating method to reduce the heating power will result in longer cooking times, affecting the user experience, and this needs to be improved. Summary of the Invention

[0003] The present application provides a pot cover for a cooking utensil, which is provided with a steam exhaust port and a cold air inlet on the cover, so as to realize the introduction of cold air and the discharge of steam, thereby achieving the purpose of preventing overflow.

[0004] The technical solutions adopted in this application are:

[0005] A pot cover for a cooking utensil comprises a top cover, a lining cover and an inner cover, wherein the inner cover is provided with a steam exhaust pipe, the steam exhaust pipe is provided with a cold air introduction pipe, the steam exhaust pipe has a steam inlet channel connected to a cooking cavity and an exhaust channel connected to the steam inlet channel, the top cover is provided with a steam exhaust port and a cold air inlet, the steam exhaust channel is connected to external exhaust through the steam exhaust port, the cold air introduction pipe is connected to external air intake through the cold air inlet, and the air outlet end of the cold air introduction pipe is connected to the steam exhaust channel.

[0006] Furthermore, the upper surface of the pot cover is provided with a groove, which is formed by the local sinking of the surface cover; or the groove is provided on the lining cover, and the surface cover is provided with a perforation corresponding to the groove, the steam exhaust port is located in the groove, and / or the cold air inlet is provided in the groove.

[0007] Furthermore, the cold air inlet is higher than the steam exhaust port.

[0008] Furthermore, the steam exhaust port is located on the central axis of the cover.

[0009] Furthermore, the distance between the steam exhaust port and the rear end of the cover is smaller than the distance between the cold air inlet and the rear end of the cover.

[0010] Furthermore, the pot cover is provided with a mixing chamber, the steam outlet end of the exhaust channel is connected to the mixing chamber, and the mixing chamber is connected to the outside to exhaust steam through the exhaust port.

[0011] Furthermore, a projection of the steam outlet end of the exhaust passage in the horizontal direction and a projection of the exhaust port in the horizontal direction are staggered.

[0012] Furthermore, the cold air inlet pipe partially extends into the mixing chamber to be connected to the exhaust passage.

[0013] Furthermore, the exhaust passage has a contraction section with a contracted inner diameter, and the outlet end of the cold air inlet pipe is connected to the contraction section.

[0014] The present application also proposes a cooking utensil, comprising a pot body having a cooking cavity and a pot lid for opening or closing the cooking cavity, wherein the pot lid is the pot lid of the above-mentioned cooking utensil, and the exhaust pipe is connected to the cooking cavity. The steam generated in the cooking cavity passes through the exhaust pipe and is discharged to the outside through the exhaust port.

[0015] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0016] 1. The exhaust pipe is equipped with a cold air inlet pipe, which draws cold air into the exhaust channel of the exhaust pipe. The introduction of cold air will impact the bubbles, not only defoaming them, but also cooling them, condensing them into liquid, further improving the defoaming effect. Even when cooking at high power, the exhaust port on the cover will not overflow with continuous bubbles, greatly improving the overflow prevention effect of the cooking appliance. The cold air inlet on the cover can bring external cold air into the cover.

[0017] 2. The upper surface of the pot lid is provided with a groove, formed by a partial depression of the surface cover; or the groove is provided in the lining cover, and the surface cover is provided with a perforation corresponding to the groove, the steam exhaust port is located in the groove, and / or the cold air inlet is located in the groove. The provision of the groove can collect a small amount of condensed water formed at the mouth of the steam exhaust port when steam is discharged.

[0018] 3. The cold air inlet is higher than the exhaust port. This facilitates the intake of cold air, reduces the intake of high-temperature steam discharged from the exhaust port, and prevents the backflow of condensed water from the exhaust steam through the cold air inlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0020] Figure 1 This is a cross-sectional view of a partial structure of a cooking utensil according to one embodiment of the present application;

[0021] Figure 2 This is a cross-sectional view of the lower cover structure of an embodiment of the present application;

[0022] Figure 3This is a cross-sectional view of a specific example of an exhaust pipe according to an embodiment of the present application;

[0023] Figure 4 This is a cross-sectional view of the lower exhaust pipe in Example 1 of the second embodiment of the present application;

[0024] Figure 5 This is a cross-sectional view of the lower exhaust pipe in Example 2 of the second embodiment of the present application;

[0025] Figure 6 This is a cross-sectional view of the lower exhaust pipe in Example 3 of the second embodiment of the present application;

[0026] Figure 7 This is a cross-sectional view of the exhaust pipe in the second embodiment of the present application under an example in Example 4;

[0027] Figure 8 This is a cross-sectional view of the exhaust pipe in another example of Example 4 according to the second embodiment of the present application;

[0028] Figure 9 This is a schematic diagram of a cover in one embodiment of the present application;

[0029] Figure 10 This is a top view of the cover according to one embodiment of the present application.

[0030] in:

[0031] 1. Lining cover; 11. Baffle;

[0032] 2. Inner cover;

[0033] 3. Seals;

[0034] 4. Mixing chamber; 41. Exhaust port;

[0035] 5. Exhaust pipe; 51. Steam inlet channel; 52. Exhaust channel; 53. Cluster section; 54. Contraction section; 55. Expansion section; 56. Casing; 57. Inlet gap; 58. Exhaust end; Mounting section 59;

[0036] 6. Cold air inlet pipe; 61. Flow spoiler; 62. Air outlet notch;

[0037] 7. Reflux valve;

[0038] 8. Surface cover; 81. Air conditioning inlet; 82. Groove. DETAILED DESCRIPTION

[0039] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0040] The following description sets forth many specific details to facilitate a thorough understanding of the present application. However, the present application may also be implemented in other ways than those described herein, and therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features of each embodiment may be combined with each other unless there is a conflict.

[0041] like Figure 1 and Figure 2 As shown, a cooking appliance includes a pot body with a cooking cavity and a pot cover for opening or covering the cooking cavity.

[0042] The pot cover of this embodiment includes a surface cover 8, a lining cover 1 and an inner cover 2. The inner cover is provided with a steam exhaust pipe 5, and the steam exhaust pipe is provided with a cold air inlet pipe 6. The steam exhaust pipe has a steam inlet channel connected to the cooking cavity and an exhaust channel connected to the steam inlet channel. The surface cover is provided with a steam exhaust port 41 and a cold air inlet 81. The steam exhaust channel is connected to the outside exhaust through the steam exhaust port, and the cold air inlet pipe is connected to the outside air intake through the cold air inlet. The outlet end of the cold air inlet pipe is connected to the steam exhaust channel.

[0043] In this embodiment, the exhaust pipe includes a steam inlet channel 51 and a steam exhaust channel 52. The steam inlet channel 51 and the steam exhaust channel 52 can be composed of two detachable exhaust pipes or a single, integrated exhaust pipe. In the case of a single, integrated exhaust pipe, the front portion corresponds to the steam inlet channel 51, and the rear portion corresponds to the steam exhaust channel 52. The steam inlet channel 51 communicates with the cooking chamber, while the steam exhaust channel 52 communicates with the steam inlet channel 51. The steam exhaust channel 52 can exhaust steam to the outside through the exhaust port 41.

[0044] For the specific form of the exhaust pipe, you can refer to Figure 2 As shown, the steam inlet channel 51 is vertically arranged, and a bending portion is provided between the exhaust channel 52 and the steam inlet channel 51 so that the exhaust channel 52 extends horizontally. The exhaust pipe as a whole looks like a "7" shape.

[0045] In this embodiment, preferably, reference can be made to Figure 3 A bend is provided between the steam inlet passage 51 and the steam exhaust passage 52. This arrangement blocks and redirects the steam generated in the cooking chamber as it enters the exhaust pipe, allowing the steam to liquefy and condense during this redirection. This is particularly true when cooking rice or porridge. The starch in the rice soup or small ingredients may enter the steam inlet passage 51 as the cooking chamber boils. The bend prevents these starches and small ingredients from falling back into the cooking chamber, reducing the chance of the exhaust pipe becoming clogged.

[0046] The air inlet end of the cold air introduction pipe 6 of this embodiment is connected to the cold air inlet or extends to the outside, and the air outlet end is connected to the exhaust passage 52. By providing the cold air introduction pipe 6 for drawing cold air into the exhaust passage, the introduction of cold air will have an impact on the bubbles, not only achieving defoaming, but also cooling the bubbles, causing them to condense into liquid, further improving the defoaming effect. Even when cooking at high power, there will be no continuous bubble overflow from the exhaust port of the steam valve assembly, greatly improving the anti-overflow effect of the cooking appliance.

[0047] As a preferred embodiment of the present application, the exhaust passage has a contraction section 54 with a contracted inner diameter, and the outlet end of the cold air inlet pipe 6 is connected to the contraction section 54. The exhaust pipe is provided with a contraction section 54 with a contracted inner diameter within its exhaust passage, so that before the steam flows from the exhaust passage to the cooking chamber, the steam is accelerated when it flows to the contraction section due to the provision of the contraction section, thereby causing a decrease in pressure at the contraction section. The change in pressure and flow rate will cause a sudden change in the surface tension of the bubbles, resulting in bubble breaking or large bubbles becoming smaller. The outlet end of the cold air inlet pipe is directly connected to the contraction section, and external cold air will be introduced into this low-pressure area to achieve cooling and defoaming.

[0048] The cold air inlet pipe 6 of the present application is arranged perpendicular to the exhaust channel 52. When the steam in the cooking cavity is discharged through the exhaust channel 52, it has a certain flow speed and inertia. Since the cold air inlet pipe 6 is arranged perpendicular to the exhaust channel 52, the steam will hardly escape from the cold air inlet pipe 6. On the contrary, due to the flow of steam, the pressure is reduced, so that the cold air inlet pipe 6 can introduce external cold air, thereby achieving the purpose of defoaming.

[0049] The exhaust pipe 5 and the cold air inlet pipe 6 of the present application can be integrally formed together and can be made of silicone material for easy manufacturing and molding. Alternatively, the two can be detachably connected and assembled together.

[0050] In the present application, the steam outlet end of the exhaust channel 52 is connected to the mixing chamber 4. When the fluid gushing out from the steam outlet end of the exhaust channel 52 enters the mixing chamber 4 from the exhaust channel 52, it will undergo a pressure release process. This pressure change helps to break the bubbles, thereby further eliminating the unbroken bubbles. After the foam breaks, it will be buffered in the mixing chamber 4 under the action of its own weight to avoid clogging the exhaust port 41. Moreover, the rupture of the foam at the connection position between the steam outlet end of the exhaust channel 52 and the mixing chamber 4 caused by the pressure change between the two can reduce the resistance of the exhaust channel 52, so that fluids such as steam and foam can be discharged more smoothly, thereby improving the exhaust efficiency.

[0051] Furthermore, if the foam cannot be broken in time during the steam discharge process, the presence of the foam will cause local disturbances and resistance in the steam flow. These disturbances and resistances can easily lead to turbulence in the steam flow, thereby causing noise escalation. The present application can achieve bubble breaking through the cooperation of the contraction section 54 and the cold air inlet pipe 6 before the steam flows into the mixing chamber 4. After the foam bursts, these local disturbances and resistance are reduced, the steam flow becomes smoother, and the fluid interface becomes more continuous, thereby reducing the generation of turbulence and greatly reducing the exhaust noise.

[0052] In this embodiment, referring to Figure 2 The steam valve assembly is located on the pot cover and includes an exhaust pipe 5 having an exhaust end 58 and a steam inlet end connected to the cooking chamber. The exhaust pipe has a communication port that is connected to the outside world for absorbing cold air to mix with the steam in the exhaust pipe. The exhaust end of the exhaust pipe 5 is provided with a corresponding baffle 11. The mixed airflow impacts the baffle 11 to break bubbles. For specific operation, please refer to Figure 2 As shown by the middle arrow, the high-temperature steam generated from the cooking cavity enters the exhaust pipe 5 through the steam inlet end and is discharged through the exhaust end 58. The cold air absorbed by the connecting port will mix with the steam in the exhaust pipe, and then the mixed air flow will impact the baffle 11 to achieve bubble breaking.

[0053] In this embodiment, referring to Figure 2 The baffle 11 is perpendicular to the flow path of the steam discharged from the exhaust end of the exhaust pipe. By setting the baffle perpendicular to the flow path, the steam flowing out of the exhaust channel can be more effectively blocked and redirected, thereby achieving better condensation.

[0054] As a preferred embodiment of the present application, Figure 2 As shown, the pot cover includes a lining cover 1 and an inner cover 2 detachably mounted on the lining cover 1. The steam valve assembly includes a steam valve cover mounted on the lining cover 1. The steam valve cover can also be integrally formed on the lining cover. In this embodiment, the steam valve cover constitutes the baffle 11 on the side wall of the exhaust end 58. The baffle 11 belongs to the side wall of the steam valve cover on the lining cover 1 corresponding to the exhaust end 58, that is, the high-temperature steam discharged from the exhaust end 58 hits the steam valve cover (or the lining cover 1) at the first time, which is the baffle 11 of the present application.

[0055] As a preferred embodiment of the present application, the exhaust pipe 5 is detachably mounted on the inner cover 2. This makes it convenient for users to clean it.

[0056] The liner cover 1 and / or the steam valve cover are provided with a seal 3 having a lower sealing lip that can abut and seal against the upper surface of the inner cover 2. The steam valve cover, seal 3, and inner cover 2 cooperate to form a mixing chamber 4. The exhaust pipe 5 is mounted on the inner cover 2 so that it can be removed from the liner cover 1 along with the inner cover 2, allowing the user to thoroughly clean the inner cover 2 and the exhaust pipe 5. After the inner cover 2 is removed, the mixing chamber 4 can be directly exposed to the user's field of vision, allowing the user to thoroughly clean the inner wall of the mixing chamber 4 and prevent dirt and grime from accumulating within the steam valve assembly, which could lead to bacterial growth.

[0057] Specifically, the inner cover 2 is provided with a steam outlet, and the exhaust pipe 5 is installed in connection with the steam outlet. Figure 2 The steam outlet on the inner cover 2 is located on the vertical channel of the steam inlet channel, so that the rice soup starch or small ingredients entering the steam inlet channel can fall back into the cooking cavity from the steam outlet. Figure 3 The exhaust pipe has a mounting portion 59 at its lower portion, which interfaces with the steam outlet. In this embodiment, the exhaust pipe is a silicone tube with a slot at its lower portion. The inner cover is a metal inner cover, which interfaces with the steam outlet through deformation of the slot. In other embodiments, the exhaust pipe and steam outlet can also be interfaced and mounted using threads or snap fasteners.

[0058] Preferably, if Figure 2 As shown, the inner lid 2 is provided with a reflow hole and a reflow valve 7 that floats on the inner lid 2 to open or close the reflow hole. When the pressure in the cooking chamber rises to a certain threshold, the reflow valve 7 floats upward, closing the reflow hole and preventing steam from flowing back into the mixing chamber 4. When the pressure in the cooking chamber drops to a certain threshold, the reflow valve 7 descends under the influence of its own weight and the weight of the liquid in the mixing chamber 4, opening the reflow hole. The accumulated liquid in the mixing chamber 4 then falls back into the cooking chamber through the reflow hole. Furthermore, a portion of the inner lid 2 is sunken to form a liquid collection trough connected to the mixing chamber 4, allowing condensed water and liquid that has fallen back after bubbles have broken. The reflow hole is located on the bottom wall of the liquid collection trough to facilitate liquid reflow. The reflow hole is located below the exhaust end of the exhaust pipe 5. This allows condensed water generated by the high-temperature steam discharged from the exhaust end 58, after being blocked by the baffle, to quickly flow back into the cooking chamber through the reflow hole, thereby reducing the amount of high-temperature steam that escapes into the outside world.

[0059] In this embodiment, the vertical projection of the reflow hole is located between the exhaust end 58 of the exhaust pipe 5 and the baffle 11. The high-temperature steam discharged from the exhaust end 58 changes direction after encountering the baffle 11, and some of the high-temperature steam condenses to form condensed water. The reflow hole is located just below the baffle 11 between the exhaust end 58 and the baffle 11, allowing the condensed water to flow back into the cooking chamber in a timely manner.

[0060] In this embodiment, the exhaust port 41 is located above the exhaust end 58 of the exhaust pipe. After encountering the baffle 11, the high-temperature steam discharged from the exhaust end 58 condenses to form condensed water, which then flows back through the reflux hole. Some of the high-temperature steam also flows within the mixing chamber 4 and is ultimately discharged to the outside through the exhaust port 41. The height of the exhaust port 41 in this embodiment is higher than that of the exhaust end 58, allowing the steam to gradually flow upward, ultimately allowing any uncondensed high-temperature steam to be discharged through the exhaust port 41.

[0061] The present application does not limit the connection position and connection method of the cold air inlet pipe 6 in the contraction section 54, and it can adopt any one of the following embodiments:

[0062] Implementation method 1: Figure 3 As shown, the outlet end of the cold air inlet pipe 6 is flush with the inner wall of the exhaust passage 52 and, along the steam flow direction, is connected to the midstream side of the contraction section 54. This arrangement allows the cold air inlet pipe 6 to connect to the lowest pressure point of the exhaust passage 52, facilitating the introduction of external cold air and improving the bubble breaking effect.

[0063] Embodiment 2: The cold air inlet pipe 6 has a flow-disturbing section extending into the exhaust passage 52, and the flow-disturbing section has a flow-disturbing portion 61 facing the steam inlet end of the exhaust passage 52. The provision of the flow-disturbing section can disturb the fluid flowing from the steam inlet end of the steam inlet passage 51 to the contraction section 54, thereby increasing the contact time and contact area between the cold air and the fluid in the contraction section 54, further improving the bubble breaking effect, reducing the accumulation of foam in the exhaust passage 52, thereby facilitating the smooth discharge of steam and improving the exhaust efficiency. Moreover, the flow-disturbing section extending into the exhaust passage 52 can further reduce the cross-sectional area of the exhaust passage 52 at that position, thereby causing the fluid velocity at that position in the exhaust passage 52 to change, thereby causing a pressure change. Combined with the provision of the contraction section 54, the pressure change in the exhaust passage 52 is diversified, greatly improving the bubble breaking efficiency.

[0064] As a preferred embodiment of the second embodiment, Figures 4 to 8 As shown, the flow-disturbing section further has an air outlet notch 62 facing the steam outlet end of the exhaust passage 52. The provision of the air outlet notch 62 can disrupt the laminar flow of the cold air, causing the cold air to generate turbulent flow at this location, increasing the contact area and contact time between the cold air and the fluid, and further improving the bubble breaking effect.

[0065] In the second embodiment, the connection position between the cold air inlet pipe 6 and the contraction section 54 can adopt any one of the following embodiments:

[0066] Example 1: Figure 4As shown, along the flow direction of the steam, the outlet end of the cold air introduction pipe 6 is connected to the upstream side of the contraction section 54. By introducing cold air on the upstream side of the contraction section 54, the cold air can partially fill the contraction section 54, thereby reducing the flow rate and pressure drop of the steam to a certain extent, thereby reducing the pressure loss of the steam when passing through the contraction section 54, thereby ensuring the flow rate of the steam when it is discharged through the exhaust channel 52 and ensuring the exhaust efficiency.

[0067] Example 2: Figure 5 As shown, along the steam flow direction, the outlet end of the cold air introduction pipe 6 is connected to the downstream side of the contraction section 54. By introducing cold air downstream of the contraction section 54, the steam temperature can be lowered, reducing the thermal impact of the steam on the mixing chamber 4 when it is discharged from the steam exhaust channel 52. This helps the steam condense into water in the mixing chamber 4, reduces the amount of steam discharged, and protects the storage environment of the cooking utensils.

[0068] Example 3: Figure 6 As shown, along the flow direction of steam, the outlet end of the cold air introduction pipe 6 is connected to the midstream side of the contraction section 54. The flow velocity of the fluid on the midstream side of the contraction section 54 is relatively high. By introducing cold air, the flow velocity can be reduced to a certain extent, thereby achieving noise reduction.

[0069] The formation method of the contraction section 54 in the second embodiment can adopt any one of the following embodiments:

[0070] Example 4: Figure 7 As shown, the distance between the bottom wall of the spoiler 61 and the bottom wall of the exhaust passage 52 is less than or equal to 1 / 2 of the inner diameter of the exhaust passage 52, so as to form a contraction section 54 between the bottom wall of the spoiler 61 and the bottom wall of the exhaust passage 52. Furthermore, in a preferred example, as Figure 8 As shown, along the flow direction of steam, the exhaust channel 52 also has a cluster section 53 located on the upstream side of the contraction section 54. The inner diameter of the cluster section 53 gradually decreases from the side away from the contraction section 54 to the side close to the contraction section 54, so as to further optimize the flow rate of the fluid at the contraction section 54, so as to form a relatively low pressure and facilitate the introduction of external cold air.

[0071] As a preferred embodiment of the present application, along the flow direction of steam, the exhaust channel 52 also has a cluster section 53 located on the upstream side of the contraction section 54. The inner diameter of the cluster section 53 is larger than the inner diameter of the contraction section 54, and the inner diameter of the cluster section 53 is smaller than the inner diameter of the steam inlet channel 51. The setting of the cluster section 53 allows the fluid to undergo a process of gradually decreasing pressure before entering the contraction section 54, thereby avoiding pressure pulsation noise and vibration caused by sudden changes in fluid pressure. Moreover, the inner diameter of the cluster section 53 is larger than the inner diameter of the contraction section 54, which helps to reduce the accumulation of foam before entering the contraction section 54, further increasing the flow rate of the fluid when flowing through the contraction section 54, thereby helping to reduce the pressure drop at the contraction section 54, and further helping to improve the smoothness with which the external cold air can enter the contraction section 54 through the cold air inlet pipe 6, so that the bubble breaking effect is better.

[0072] This embodiment does not limit the way in which the inner diameter of the cluster section 53 changes: in one embodiment, Figure 3 、 Figure 5 、 Figure 6 、 Figure 8 As shown, the inner diameter of the clustering section 53 gradually decreases from the side away from the contraction section 54 to the side close to the contraction section 54, thereby achieving a gradual change in the inner diameter of the clustering section 53. In another embodiment, the inner diameter of the clustering section 53 changes in a step-like manner, with the inner diameter being smallest on the side close to the contraction section 54 and largest on the side away from the contraction section 54.

[0073] As a preferred embodiment of the present application, the exhaust passage 52 further includes an expansion section 55 located downstream of the contraction section 54 along the steam flow direction. The inner diameter of the expansion section 55 is larger than that of the contraction section 54, and the gas-liquid mixed fluid is sprayed into the mixing chamber 4 through the expansion section 55. The design of the expansion section 55 causes the fluid in the exhaust passage 52 to undergo another pressure release process when flowing from the contraction section 54 to the expansion section 55. The pressure change helps to achieve bubble breaking. Moreover, the larger inner diameter of the expansion section 55 provides more space for the gas-liquid mixed fluid, thereby facilitating the separation of steam and liquid and improving exhaust efficiency.

[0074] This embodiment does not limit the way in which the inner diameter of the expansion section 55 changes: in one embodiment, Figures 3 to 6 As shown, the inner diameter of the expansion section 55 gradually decreases from the side away from the contraction section 54 to the side close to the contraction section 54, thereby achieving a gradual change in the inner diameter of the expansion section 55. In another embodiment, the inner diameter of the expansion section 55 changes in a step-like manner, with the inner diameter being smallest on the side close to the contraction section 54 and largest on the side away from the contraction section 54.

[0075] As a preferred embodiment of the present application, the axis of the steam outlet end of the exhaust channel 52 is arranged at an angle to the axis of the exhaust port 41. This angle lengthens the flow path from the steam outlet end of the exhaust channel 52 to the exhaust port 41, thereby increasing the resistance loss along the flow path, which both helps break bubbles and reduces noise. Furthermore, this angle ensures that the steam outlet end of the exhaust channel 52 is at least partially offset from the exhaust port 41, preventing the fluid from being ejected directly from the exhaust port 41.

[0076] As a preferred example of this embodiment, Figure 1 and Figure 2 As shown, the horizontal projection of the steam outlet end of the exhaust channel 52 and the horizontal projection of the exhaust port 41 are staggered. This arrangement can extend the flow path of the fluid and achieve speed reduction and noise reduction. Furthermore, the axis of the steam outlet end of the exhaust channel 52 and the axis of the exhaust port 41 are perpendicular to each other, so that when the fluid flows out through the steam outlet end of the exhaust channel 52 and flows toward the exhaust port 41, it will go through at least one corner. The corner can force the fluid to change the flow direction and increase the disturbance in the fluid, thereby helping to destroy the stability of the foam and promote the rupture of the foam. Moreover, at the corner, due to the action of centrifugal force, the steam and liquid are more easily separated, thereby promoting gas-liquid separation and improving the exhaust efficiency.

[0077] As a preferred embodiment of the present application, Figure 2 As shown, the exhaust port 41 of the mixing chamber 4 and the exhaust end of the exhaust channel 52 are separated on two opposite sides of the cold air inlet pipe 6. On the one hand, the flow path of the fluid from the exhaust channel 52 to the exhaust port 41 can be further extended to further achieve bubble breaking. On the other hand, the steam will bypass the cold air inlet pipe 6 during the discharge path, thereby achieving heat exchange and reducing the steam discharge temperature.

[0078] As a preferred embodiment of the present application, Figure 1 and Figure 2 As shown, the air inlet end of the cold air inlet pipe 6 extends to the outside of the mixing chamber 4, and the air inlet end of the cold air inlet pipe 6 is staggered with the exhaust end of the exhaust port 41. This arrangement can reduce the probability of hot steam discharged from the exhaust port 41 being introduced into the cold air inlet pipe 6, so that the temperature of the air introduced into the contraction section 54 from the cold air inlet pipe 6 is lower, thereby improving the bubble breaking effect. Figure 2 As shown, the top surface of the cold air introduction pipe 6 is higher than the top surface of the steam exhaust port 41, so as to further reduce the probability of the cold air introduction pipe 6 sucking in the discharged hot steam.

[0079] In another embodiment, the air inlet end of the cold air introduction pipe 6 is flush with the outer wall surface of the top wall of the mixing chamber 4 .

[0080] For the structure of the cover, please refer to Figure 9 and Figure 10 The cover is provided with a steam exhaust port 41 and a cold air inlet 81. The steam exhaust channel is connected to the outside exhaust through the steam exhaust port 41, and the cold air inlet pipe is connected to the outside air intake through the cold air inlet 81. When the cover 8 is installed on the lining cover 1, the steam exhaust port 41 on the cover will be connected to the outside exhaust port 41. Figure 1 The exhaust port 41 in the cooling air inlet 81 will be connected to the Figure 1 The cold air introduction pipe 6 in the backing is docked to realize the installation of the cover. After the cover 8 is installed to the lining cover 1, only the exhaust port 41 and the cold air inlet 81 can be seen from the outside, one of which discharges steam and the other absorbs cold air.

[0081] Specifically, the upper surface of the pot lid is provided with a groove, wherein the groove 82 is formed by partially sinking the surface cover; the steam exhaust port 41 is located in the groove 82, and / or the cold air inlet 82 is provided in the groove. The provision of the groove can collect a small amount of condensed water formed at the mouth of the steam exhaust port when steam is discharged. The cold air inlet 82 can be provided in the groove 82, or of course, it can also be provided in an area outside the groove 82. When the cold air inlet 81 is also provided in the groove, it can be provided on opposite sides of the groove 82 as the steam exhaust port 41.

[0082] Alternatively, the groove is provided on the lining cover, and a perforation is provided on the surface cover corresponding to the groove, so that the groove can be exposed.

[0083] Preferably, the cold air inlet 81 is higher than the exhaust port 41. Therefore, the intake of cold air can be facilitated, the intake of high-temperature steam discharged from the exhaust port is reduced, and the backflow from the cold air inlet when condensed water is generated by the exhaust steam can be avoided.

[0084] Reference Figure 9 The exhaust vent 41 and the cold air inlet 81 are both located on the central axis of the cover. The central axis is the symmetry axis that runs through the cover in the front-to-back direction. The exhaust vent 41 and the cold air inlet 81 are both located on this symmetry axis, which provides a good overall visual effect and can be located as far away from consumers as possible to avoid affecting the user experience.

[0085] Preferably, the distance between the exhaust port 41 and the rear end of the cover is smaller than the distance between the cold air inlet 81 and the rear end of the cover. In other words, the exhaust port 41 is closer to the rear end of the cover and further away from the user, allowing the user to be further away from the discharge of high-temperature steam, thereby improving safety performance.

[0086] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0087] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0088] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A pot cover for a cooking utensil, comprising a top cover, a lining cover and an inner cover, wherein the inner cover is provided with a steam exhaust pipe, characterized in that: A cold air inlet pipe is provided on the exhaust pipe, and the exhaust pipe has a steam inlet channel connected to the cooking cavity and an exhaust channel connected to the steam inlet channel. A steam exhaust port and a cold air inlet are provided on the surface cover. The exhaust channel is connected to external exhaust through the exhaust port, and the cold air inlet pipe is connected to external air intake through the cold air inlet. The outlet end of the cold air inlet pipe is connected to the exhaust channel.

2. The pot cover of the cooking utensil according to claim 1, characterized in that: The upper surface of the pot cover is provided with a groove, which is formed by the partial sinking of the surface cover; or the groove is provided on the lining cover, and a perforation is provided on the surface cover corresponding to the groove, the steam exhaust port is located in the groove, and / or the cold air inlet is provided in the groove.

3. The pot cover of the cooking utensil according to claim 1, characterized in that: The cold air inlet is higher than the steam exhaust port.

4. The pot cover of the cooking utensil according to claim 1, characterized in that: The steam exhaust port and the cold air inlet are both located on the central axis of the cover.

5. The pot cover of the cooking utensil according to claim 4, characterized in that: The distance between the steam exhaust port and the rear end of the cover is smaller than the distance between the cold air inlet and the rear end of the cover.

6. The pot cover of the cooking utensil according to claim 1, characterized in that: The pot cover is provided with a mixing chamber, the steam outlet end of the exhaust passage is connected to the mixing chamber, and the mixing chamber is connected to the outside to exhaust steam through the exhaust port.

7. The pot cover of the cooking utensil according to claim 6, characterized in that: The projection of the steam outlet end of the exhaust passage in the horizontal direction and the projection of the exhaust port in the horizontal direction are staggered.

8. The pot cover of the cooking utensil according to claim 6, characterized in that: The cold air introduction pipe partially extends into the mixing chamber to be connected to the exhaust passage.

9. The pot cover of the cooking utensil according to claim 1, characterized in that: The exhaust passage has a contraction section with a contracted inner diameter, and the outlet end of the cold air inlet pipe is connected to the contraction section.

10. A cooking appliance comprising a pot body having a cooking cavity and a pot lid for opening or closing the cooking cavity, characterized in that: The pot cover is the pot cover of the cooking utensil according to any one of claims 1 to 9, the exhaust pipe is connected to the cooking cavity, and the steam generated in the cooking cavity passes through the exhaust pipe and is exhausted to the outside through the exhaust port.

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