Steam valve assembly and cooking utensil thereof

Abstract

The steam valve assembly comprises a steam exhaust pipe, the steam exhaust pipe is provided with a steam exhaust end and a steam inlet end communicated with a cooking cavity, the steam exhaust pipe is provided with a communication port, the communication port is communicated with the outside and used for absorbing cold air to be mixed with steam in the steam exhaust pipe, and the steam exhaust end of the steam exhaust pipe is provided with a corresponding baffle. And the mixed air flow impacts on the baffle plate. The corresponding baffle is arranged at the steam exhaust end, bubble breaking can be achieved, the steam flowing path can be changed, and finally the steam flowing path is prolonged. The utility model further discloses a cooking utensil with the steam valve assembly.

Description

Technical Field

[0001] The present application belongs to the technical field of kitchen appliances, and in particular relates to a steam valve assembly and a cooking appliance thereof. Background Art

[0002] Rice cookers typically feature a steam valve assembly, through which steam generated during cooking passes before being exhausted. The primary function of a steam valve is to prevent rice soup from overflowing. To achieve this, existing steam valves typically extend the steam path or incorporate a bubble-breaking device, leaving much room for improvement. Summary of the Invention

[0003] The present application provides a steam valve assembly to solve the technical problem of poor overflow prevention effect of existing steam valves.

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

[0005] A steam valve assembly includes a steam exhaust pipe, wherein the steam exhaust pipe has a steam exhaust end and a steam inlet end connected to a cooking chamber, the steam exhaust pipe has a connecting port, the connecting port is connected to the outside world for absorbing cold air to mix with the steam in the steam exhaust pipe, and the steam exhaust end of the steam exhaust pipe is provided with a corresponding baffle, and the mixed airflow impacts the baffle.

[0006] Furthermore, the baffle is perpendicular to the flow path of the steam discharged from the exhaust end of the exhaust pipe.

[0007] Furthermore, the steam valve assembly further includes a reflux hole and a reflux valve floatingly arranged on the reflux hole, and the reflux hole is located below the exhaust end of the exhaust pipe.

[0008] Furthermore, the steam valve assembly includes a valve body, the valve body is provided with a reflux hole, or the steam valve assembly is fixed to a detachable inner cover, the inner cover is provided with the reflux hole.

[0009] Furthermore, the vertical projection of the reflow hole is located between the exhaust end of the exhaust pipe and the baffle.

[0010] Furthermore, it also includes a cold air introduction pipe, the air inlet end of the cold air introduction pipe is connected to the outside for absorbing cold air, and the air outlet end is connected to the connecting port of the exhaust pipe to introduce cold air before the exhaust pipe discharges steam.

[0011] Furthermore, the exhaust pipe 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.

[0012] The present application also proposes a cooking utensil, comprising a pot body and a pot cover, the pot cover being provided with the above-mentioned steam valve assembly, the pot cover comprising a lining cover and a detachable inner cover, the lining cover being provided with a steam valve cover, and the steam valve cover constituting the baffle on the side wall of the exhaust end.

[0013] Furthermore, a seal is provided on the lining cover and / or the steam valve cover, and the seal has a lower sealing lip that can abut and seal with the upper surface of the inner cover. The steam valve cover, the seal and the inner cover cooperate to form a buffer cavity, and the steam enters the buffer cavity after being discharged from the exhaust end of the exhaust pipe.

[0014] Furthermore, the buffer chamber is provided with a steam exhaust port communicating with the outside, and the steam exhaust port is located above the steam exhaust end of the steam exhaust pipe.

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

[0016] 1. The steam valve assembly of this application is connected to the outside world by a cold air inlet pipe to absorb cold air. The introduction of cold air impacts the bubbles, not only eliminating them but also cooling them, condensing them into liquid, further enhancing the defoaming effect. Even when cooking at high power, the exhaust port of the steam valve assembly will not produce continuous bubbles, significantly improving the overflow prevention of the cooking appliance. The exhaust end of the exhaust pipe is equipped with a corresponding baffle. The mixed airflow impacts the baffle, changing the steam flow path and ultimately extending the steam flow path, thus achieving a defoaming effect.

[0017] 2. The baffle 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.

[0018] 3. The steam valve assembly also includes a reflux hole and a reflux valve floatingly mounted on the reflux hole. The reflux hole is located below the outlet of the exhaust passage. By providing the reflux hole below the outlet of the exhaust passage, after steam is discharged from the outlet and blocked by the baffle, some of the high-temperature steam condenses to form condensed water, which then flows back into the cooking chamber through the reflux hole below.

[0019] 4. The exhaust passage has a constricted section with a narrowed inner diameter. The air inlet end of the cold air inlet pipe is connected to the outside world, and the air outlet end is connected to the constricted section. The exhaust pipe has a constricted section with a narrowed inner diameter within its exhaust passage. This section accelerates steam as it flows through the exhaust passage to the cooking chamber, thereby reducing pressure at the constricted section. This change in pressure and flow rate causes a sudden change in bubble surface tension, resulting in bubble breakage or the reduction of large bubbles to smaller ones. The air outlet end of the cold air inlet pipe is directly connected to the constricted section. According to the Venturi principle, cold air from the outside is drawn into this low-pressure area, achieving cooling and defoaming. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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:

[0021] Figure 1 This is a cross-sectional view of a partial structure of a cooking utensil according to one embodiment of the present application;

[0022] Figure 2 This is a cross-sectional view of the lower cover structure of an embodiment of the present application;

[0023] Figure 3 This is a cross-sectional view of a specific example of an exhaust pipe according to an embodiment of the present application;

[0024] Figure 4 This is a cross-sectional view of the lower exhaust pipe in Example 1 of the second embodiment of the present application;

[0025] Figure 5 This is a cross-sectional view of the lower exhaust pipe in Example 2 of the second embodiment of the present application;

[0026] Figure 6 This is a cross-sectional view of the lower exhaust pipe in Example 3 of the second embodiment of the present application.

[0027] in:

[0028] 1. Lining cover; 11. Baffle;

[0029] 2. Inner cover;

[0030] 3. Seals;

[0031] 4. Buffer chamber; 41. Steam exhaust port;

[0032] 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;

[0033] 6. Cold air inlet pipe; 61. Flow spoiler; 62. Air outlet notch;

[0034] 7. Reflux valve. DETAILED DESCRIPTION

[0035] 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.

[0036] like Figure 1 and Figure 2 As shown, an anti-overflow cooking utensil includes a pot body with a cooking cavity and a pot cover for opening or closing the cooking cavity, wherein the pot cover is provided with a steam valve assembly and a cold air inlet communicating with the outside.

[0037] The steam valve assembly has a mixing chamber 4, and the mixing chamber 4 is provided with a steam exhaust port 41 connected to the outside. The steam valve assembly includes a steam exhaust pipe 5 connected to the cooking chamber, and the steam exhaust pipe has a contraction section 54 with a contracted inner diameter. The cold air introduced by the cold air inlet is introduced into the contraction section 54. The steam outlet end of the steam exhaust pipe is located in the mixing chamber 4, so that the steam introduced by the steam exhaust pipe and the cold air introduced by the cold air inlet are mixed in the steam exhaust pipe and then discharged into the mixing chamber 4 through the steam outlet end.

[0038] After high-temperature steam is generated in the cooking cavity, it flows within the exhaust pipe 5. The exhaust pipe 5 of the present application is provided with a contraction section 54 with a narrowed inner diameter. Due to the provision of the contraction section 54, the steam is accelerated when it reaches the contraction section 54, resulting in a decrease in pressure at the contraction section 54. The change in pressure and flow rate causes a sudden change in the surface tension of the bubbles, resulting in bubble breakage or the reduction of large bubbles to smaller ones. The cold air introduced by the cold air inlet is directed into the contraction section 54. According to the Venturi principle, the external cold air is drawn into this low-pressure area, further impacting the bubbles. This not only eliminates the bubbles, but also cools them, condensing them into liquid, further enhancing the defoaming effect. This ensures that even when cooking at high power, there will be no continuous bubble overflow from the exhaust port 41 of the steam valve assembly, significantly improving the anti-overflow effect of the cooking appliance. When the cold air is introduced into the contraction section 54, the steam introduced by the exhaust pipe and the cold air introduced by the cold air inlet are mixed for the first time in the exhaust pipe, so that the temperature of the high-temperature steam can be reduced to a certain extent. After the first mixing, it will be discharged into the mixing chamber 4 through the steam outlet end. Because the space of the mixing chamber 4 is larger than that of the exhaust pipe, a second more sufficient mixing can be obtained, so that the temperature of the high-temperature steam can be further reduced, and then a part of the high-temperature steam can be liquefied to form condensed water, which can ultimately reduce the discharge of high-temperature steam from the exhaust port 41.

[0039] Specifically, the method of introducing cold air can be as follows: Figure 1 and Figure 2As shown, a cold air inlet pipe 6 is provided, with the air inlet end of the cold air inlet pipe 6 connected to the cold air inlet or extending to the outside, and the air outlet end connected to the contraction section 54. Of course, instead of providing a separate cooling inlet pipe, a communication port can be provided at the contraction section 54, and the communication port can be connected to the cold air inlet via a mixing chamber. Alternatively, the cold air inlet pipe can have only a small section, with the other section transmitting cold air via the mixing chamber.

[0040] 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 integral exhaust pipe. When the exhaust pipe is an integral exhaust pipe, the front portion corresponds to the steam inlet channel 51 and the rear portion corresponds to the steam exhaust channel 52.

[0041] 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.

[0042] 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 be discharged 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.

[0043] 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.

[0044] In the present application, the steam outlet end of the exhaust channel 52 is connected to the buffer chamber 4. When the fluid gushing out from the steam outlet end of the exhaust channel 52 enters the buffer 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 buffer 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 buffer 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.

[0045] 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 during 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 buffer chamber 4. After the foam bursts, these local disturbances and resistances 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.

[0046] 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, and the mixed airflow impacts the baffle 11. 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.

[0047] 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.

[0048] 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.

[0049] The liner cover 1 and / or steam valve cover are provided with a seal 3 having a lower sealing lip that abuts and seals against the upper surface of the inner cover 2. The steam valve cover, seal 3, and inner cover 2 cooperate to form a buffer 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 buffer chamber 4 is directly exposed to the user's field of vision, allowing the user to thoroughly clean the inner wall of the buffer chamber 4 and prevent the accumulation of dirt and grime within the steam valve assembly, which could lead to bacterial growth. Furthermore, the exhaust pipe 5 is detachably mounted on the inner cover 2 so that it can be removed and cleaned.

[0050] Specifically, an air outlet is provided on the inner cover 2, and the exhaust pipe is installed at the air outlet. Figure 3 The exhaust pipe has a mounting portion 59 at its lower portion, which is used to connect and mount to the 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 connects and mounts to the outlet through deformation of the slot. In other embodiments, the exhaust pipe and outlet can also be connected and mounted using threads or snap fasteners.

[0051] 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 buffer 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 buffer chamber 4, opening the reflow hole. The accumulated liquid in the buffer 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 buffer chamber 4, allowing the buffer chamber 4 to collect 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.

[0052] In other embodiments, the steam valve assembly may include a valve body with a return hole provided thereon, or, as described in the previous paragraph, the steam valve assembly may be fixed to a removable inner cover with a return hole provided thereon. In other words, the return hole may be provided on the steam valve assembly or on the inner cover. In this embodiment, the return hole is an important function of the steam valve assembly and should be understood as part of the steam valve assembly.

[0053] 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.

[0054] 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.

[0055] 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:

[0056] 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.

[0057] 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.

[0058] As a preferred embodiment of the second embodiment, Figures 4 to 6As 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.

[0059] 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:

[0060] Example 1: Figure 4 As 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.

[0061] 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 shock to the buffer chamber 4 when the steam is discharged from the steam exhaust channel 52. This helps the steam condense into water in the buffer chamber 4, reduces the amount of steam discharged, and protects the storage environment of the cooking utensils.

[0062] 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.

[0063] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0064] 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.

[0065] 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 steam valve assembly comprising a steam exhaust pipe having a steam exhaust end and a steam inlet end communicating with a cooking chamber, wherein: The exhaust pipe has a connecting port, which 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 is provided with a corresponding baffle, and the mixed airflow impacts the baffle.

2. The steam valve assembly according to claim 1, characterized in that The baffle is perpendicular to the flow path of the steam discharged from the exhaust end of the exhaust pipe.

3. The steam valve assembly according to claim 1, characterized in that The steam valve assembly further comprises a reflux hole and a reflux valve floatingly arranged on the reflux hole, wherein the reflux hole is located below the exhaust end of the exhaust pipe.

4. The steam valve assembly according to claim 3, characterized in that The steam valve assembly includes a valve body, which is provided with a reflux hole, or the steam valve assembly is fixed to a detachable inner cover, which is provided with the reflux hole.

5. The steam valve assembly according to claim 3, characterized in that The vertical projection of the reflow hole is located between the exhaust end of the exhaust pipe and the baffle.

6. The steam valve assembly according to claim 1, wherein: It also includes a cold air introduction pipe, the air inlet end of the cold air introduction pipe is connected to the outside for absorbing cold air, and the air outlet end is connected to the connecting port of the exhaust pipe to introduce cold air before the exhaust pipe discharges steam.

7. The steam valve assembly according to claim 1, wherein: The exhaust pipe has a contraction section with a contracted inner diameter, and the communication port is provided in the contraction section.

8. A cooking utensil comprising a pot body and a pot cover, characterized in that: The pot cover is provided with a steam valve assembly as described in any one of claims 1-7, and the pot cover includes a lining cover and a detachable inner cover. The lining cover is provided with a steam valve cover, and the steam valve cover constitutes the baffle on the side wall of the exhaust end.

9. The cooking appliance according to claim 8, characterized in that The lining cover and / or the steam valve cover is provided with a seal, which has a lower sealing lip that can abut and seal with the upper surface of the inner cover. The steam valve cover, the seal and the inner cover cooperate to form a mixing chamber, and the steam enters the mixing chamber after being discharged from the exhaust end of the exhaust pipe.

10. The cooking appliance according to claim 9, characterized in that The mixing chamber is provided with a steam exhaust port communicating with the outside, and the steam exhaust port is located above the steam exhaust end of the steam exhaust pipe.

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