Drain assembly and cooking utensil having the same

Abstract

The present invention provides a drain assembly and a cooking utensil having the drain assembly, wherein the drain assembly comprises an inner pot, a grate, an outer pot and an air pressure regulating assembly. The inner pot comprises an inner pot body and an inner pot body extension portion, wherein the inner pot body has a through hole at the bottom, and the inner pot body extension portion extends toward the outside of the inner pot body along the edge of the through hole. The grate is arranged in the inner pot body. The outer pot is sealedly connected to the outside of the inner pot and forms a containing space with the inner pot, wherein a groove is provided on the inner bottom wall of the outer pot, and the inner pot body extension portion extends into the groove, and a connecting passage is formed between the top of the peripheral wall of the groove and the outer bottom wall of the inner pot body; water is poured into the inner pot body, and the water enters the groove and submerges the bottom end of the inner pot body extension portion, and the containing space is in a sealed state, and the pressure in the containing space forms a water column in the groove with a liquid level higher than the bottom end of the inner pot body extension portion and lower than the top of the groove. The air pressure regulating reduces the pressure in the containing space, and the water in the inner pot body falls into the containing space through the groove and the connecting passage.

Description

Technical Field

[0001] The invention relates to the field of household appliances, and in particular to a drain component and a cooking utensil having the drain component. Background Art

[0002] In the field of home appliances, many cooking utensils need to be drained during the process of making food. For example, in a rice cooker for draining rice, it is necessary to drain the rice after soaking it, so as to separate the rice soup containing a large amount of starch from the rice grains, thereby obtaining drained rice with less starch content. In the existing rice cookers for draining rice, soaking and draining are mainly achieved by the up and down movement of a lifting mechanism to achieve draining. Specifically, a lifting mechanism is provided inside the rice cooker for driving the inner pot to rise and fall, and the bottom of the inner pot has a drain hole. After the soaking process is completed, the lifting mechanism drives the inner pot to rise to achieve the draining operation. In addition to the rice cooker for draining rice, in hot pot cooking utensils, in order to facilitate users to pick up food in the hot pot, a lifting hot pot is currently available on the market. This lifting hot pot has a mother pot and a sub-pot located in the mother pot, and the bottom wall of the sub-pot has a drain hole. The lifting mechanism drives the sub-pot to move upward, thereby separating the hot pot soup base and the food.

[0003] Most existing cooking utensils that need to drain water use a lifting mechanism to achieve the purpose. The lifting mechanism has a complex structure and contains many parts, so it is not only large in size but also high in cost. Furthermore, the lifting stability of the lifting type drain is affected by many parts in the lifting mechanism. In actual use, it is found that the lifting is prone to jamming and the draining is not smooth. Summary of the invention

[0004] In order to overcome the problem that the existing cooking utensils that need to drain water do not drain water smoothly, the present invention provides a drain assembly with a very simple structure and very smooth drainage, and a cooking utensil with the drain assembly.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a drain assembly, which includes an inner pot, a grate, an outer pot and an air pressure regulating assembly. The inner pot includes an inner pot body and an inner pot body extension, the bottom of the inner pot body has a through hole, and the inner pot body extension extends to the outside of the inner pot body along the edge of the through hole. The grate is arranged in the inner pot body. The outer pot is sealed and connected to the outside of the inner pot and forms a storage space with the inner pot. The inner bottom wall of the outer pot has a groove, and the inner pot body extension extends into the groove. A connecting channel is formed between the top of the peripheral wall of the groove and the outer bottom wall of the inner pot body; water is poured into the inner pot body, the water enters the groove and submerges the bottom end of the inner pot body extension, the storage space is in a sealed state, and the pressure in the storage space forms a water column in the groove with a liquid level higher than the bottom end of the inner pot body extension and lower than the top of the groove. The air pressure regulating assembly is connected to the storage space to reduce the pressure in the storage space, and the water in the inner pot body falls into the storage space through the groove and the connecting channel.

[0006] According to an embodiment of the present invention, the inner bottom wall of the outer pot has a protruding portion protruding into the accommodating space, and the groove is formed at the top of the protruding portion.

[0007] According to an embodiment of the present invention, the outer bottom wall of the outer pot bulges inwardly following the inner bottom wall, and a recess is formed on the outer bottom wall.

[0008] According to one embodiment of the present invention, a distance H from the bottom end of the inner pot body extension portion to the top of the groove is greater than or equal to 2 mm.

[0009] According to an embodiment of the present invention, the width of the groove gradually increases from bottom to top.

[0010] According to one embodiment of the present invention, the air pressure regulating component is an exhaust valve connected to the accommodating space. When the food on the grate is soaked for a preset time, the exhaust valve is opened, the pressure in the accommodating space is reduced, and the water in the inner pot falls into the accommodating space through the groove.

[0011] According to one embodiment of the present invention, the air pressure regulating component is an air pump component. When the food on the grate has been soaked for a preset time, the air pump component is turned on, the pressure in the accommodating space is reduced, and the water in the inner pot body falls into the accommodating space through the groove and the connecting channel; after the draining is completed, the air pump component increases the pressure in the accommodating space, and presses the water in the accommodating space into the inner pot body through the connecting channel and the groove to soak the food again.

[0012] According to an embodiment of the present invention, the grate includes a filter screen and a hand-held portion connected to the filter screen, and a fixed step is provided on the inner wall of the inner pot body extension portion, and the filter screen is detachably arranged on the fixed step.

[0013] In another aspect, the present invention further provides a cooking utensil with a drain assembly, which comprises the drain assembly described above.

[0014] According to an embodiment of the present invention, the cooking utensil is an electric rice cooker, an electric hot pot or an electric steamer.

[0015] In summary, in the drain assembly and the cooking utensil with the drain assembly provided by the present invention, the bottom of the inner pot body has a through hole and an inner pot body extension, the inner bottom wall of the outer pot has a groove, and the inner pot body extension extends into the groove. When water is poured into the inner pot body, the water enters the groove and blocks the bottom end of the inner pot body extension, the accommodating space is in a sealed state, and the pressure in the accommodating space forms a pressure difference with the atmospheric pressure in the inner pot body. The pressure difference will form a water column in the groove with a liquid level higher than the bottom end of the inner pot body extension and lower than the top of the groove. The water column seals the bottom of the inner pot body, so that the liquid level in the inner pot body continues to rise, so that the food is soaked. After the soaking is completed, the air pressure regulating assembly reduces the pressure in the accommodating space, the pressure difference between the accommodating space and the inner pot body disappears, and the water in the inner pot body falls into the accommodating space through the groove and the connecting channel, so that the drainage is achieved and the food and water are separated.

[0016] In the drain assembly provided by the present invention, the pressure difference during the food soaking stage is naturally formed and the structure for forming the pressure difference is very simple and can be achieved without any external air pressure equipment. This arrangement greatly simplifies the structure of the drain assembly and the cooking utensil and also greatly reduces the cost of the cooking utensil. In the draining stage, the water in the inner pot can be dropped only by reducing the pressure in the accommodating space. Neither the food nor the inner pot needs any movement, and the structure is very simple.

[0017] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Shown is a schematic structural diagram of a drain assembly provided in one embodiment of the present invention.

[0019] Figure 2 Shown is a schematic structural diagram of a cooking utensil with a drain assembly provided in one embodiment of the present invention.

[0020] Figure 3 Shown Figure 2 A magnified schematic diagram of center A.

[0021] Figure 4 Shown Figure 2 An exploded schematic diagram of a cooking appliance with a drain assembly is shown.

[0022] Figure 5 Shown Figure 2 The schematic diagram of the structure of the cooking utensil with a drain assembly after food is placed in it.

[0023] Figure 6 Shown Figure 2 The schematic diagram of the structure of the cooking utensil with a drain assembly during the soaking stage is shown.

[0024] Figure 7 Shown Figure 2 The schematic diagram of the structure of the cooking appliance with a draining component in the draining stage is shown.

[0025] Figure 8 Shown Figure 2 The schematic diagram of the structure of the cooking utensil with a draining component during the steaming stage is shown.

[0026] Fig. 9 FIG. 1 is a schematic structural diagram of a cooking appliance in a steaming stage provided by another embodiment of the present invention. DETAILED DESCRIPTION

[0027] like Figure 1 As shown, the drain assembly 100 provided in this embodiment includes an inner pot 1, a grate 2, an outer pot 3 and an air pressure regulating assembly 4. The inner pot 1 includes an inner pot body 11 and an inner pot body extension 12. The bottom of the inner pot body 11 has a through hole 111, and the inner pot body extension 12 extends to the outside of the inner pot body 11 along the edge of the through hole 111. The grate 2 is arranged in the inner pot body 1. The outer pot 3 is sealedly connected to the outside of the inner pot 1 and forms a accommodating space 10 with the inner pot 1. The inner bottom wall of the outer pot 3 has a groove 31, and the inner pot body extension 12 extends into the groove 31. A connecting channel 20 is formed between the top of the peripheral wall of the groove 31 and the outer bottom wall of the inner pot body. Water is poured into the inner pot body 11, and the water enters the groove 31 and submerges the bottom end of the inner pot body extension 12. The accommodating space 10 is in a sealed state, and the pressure in the accommodating space 10 forms a water column in the groove 31, the liquid level of which is higher than the bottom end of the inner pot body extension 12 and lower than the top of the groove 31. The air pressure regulating assembly 4 is connected to the accommodating space 10, reducing the pressure in the accommodating space 10, and the water in the inner pot body 11 falls into the accommodating space 10 through the groove 31 and the connecting channel 20.

[0028] like Figure 3 As shown, in this embodiment, a fixed step 12a is provided on the inner wall of the inner pot body extension portion 12, and the grate 2 is placed on the fixed step 12a. The grate 2 includes a filter 21 and a handle 22 arranged on the filter 21, and the filter 21 has a carrying area and a drain hole for carrying food, and water or steam is transmitted through the drain hole. After the cooking is completed, the user can lift the grate 2 from the fixed step 12a by the handle 22 and clean it, and then put it back after the cleaning is completed. However, the present invention does not make any limitation to this. In other embodiments, an inwardly protruding flange can also be provided in the middle of the inner pot body, and the grate is placed on the flange.

[0029] In the drain assembly provided in this embodiment, the outer pot 3 is sealed and connected to the outside of the inner pot 1. When water is injected into the inner pot body 11, the injected water falls into the groove 31 under the action of gravity. When the liquid level of the water falling into the groove 31 is higher than the bottom end of the inner pot body extension 12, the accommodating space 10 forms a sealed space. As the liquid level in the groove 31 rises, the water entering the groove 31 compresses the gas in the sealed accommodating space 10, the pressure in the accommodating space 10 increases, and a pressure difference is formed between the accommodating space 10 and the inner pot body 11. This pressure difference blocks the increase of the liquid level in the groove 31, so that a water column that stably blocks the bottom end of the inner pot body extension 12 is formed in the groove 31. The liquid level in the inner pot body 11 rises and submerges the food placed on the grate 2, so that the food is soaked. After the soaking meets the requirements, the air pressure regulating assembly 4 connected to the accommodating space 10 is opened to reduce the pressure in the accommodating space 10. The pressure difference between the accommodating space 10 and the inner pot body 11 disappears, and the water in the inner pot body 11 naturally falls into the accommodating space 10 under the action of gravity.

[0030] In the drain assembly provided in this embodiment, the inner pot body extension 12 and the groove 31 are arranged so that when water is injected, a water column can be formed in the groove 31 to block the bottom of the inner pot body extension 12, so that the accommodating space 10 forms a sealed space. Then, the pressure difference between the sealed accommodating space 10 and the inner pot body 11 is used to make the water column in the groove 31 stably seal the inner pot body extension 12. In the drain assembly provided in this embodiment, the pressure difference of the water seal is completely formed naturally based on the structure of the inner pot 1 and the outer pot 3, and can be achieved without the help of any external air pressure equipment, which not only greatly simplifies the structure of the cooking utensil, but also greatly reduces the cost of the cooking utensil. Further, compared with the existing lifting type drain assembly, the drain assembly provided in this embodiment does not have any lifting mechanism, and the inner pot 1, the grate 2 and the food on the grate 2 do not move during the entire cooking process; soaking rice and draining are both achieved by the movement of water, and the whole process is very smooth.

[0031] Preferably, the distance H from the bottom end of the inner pot body extension 12 to the top of the groove 31 is set to be greater than or equal to 2 mm. However, the present invention is not limited to this. In other embodiments, the height of the distance H from the bottom end of the pot body extension to the top of the groove can be set according to the amount of water required to submerge the food in the inner pot body, so that when soaking rice, the liquid level of the water column formed in the groove is higher than the bottom end of the inner pot body extension and lower than the top of the groove.

[0032] Corresponding to the above-mentioned drain assembly, this embodiment also provides a cooking utensil including the above-mentioned drain assembly 100. The cooking utensil with the drain assembly also includes a pot cover 200 opened or closed on the inner pot body 11 and a heating assembly 300 connected to the inner pot body 11 to transport water or steam to the inner pot body. The heating assembly 300 includes a heater 301 and a first pipe 302 connected to the inner pot body 11. The working principle of the drain assembly will be described in detail below in conjunction with the cooking utensil with the drain assembly. Figure 5 Shown Figure 2 The schematic diagram of the structure of the cooking utensil with a drain assembly after food is placed in it. Figure 6 Shown Figure 2 The schematic diagram of the structure of the cooking utensil with a drain assembly during the soaking stage is shown. Figure 7 Shown Figure 2 The schematic diagram of the structure of the cooking appliance with a draining component in the draining stage is shown.

[0033] In this embodiment, the food 1A placed on the grate 2 is rice grains, and the cooking utensil provided in this embodiment is a rice draining cooking utensil. However, the present invention is not limited to this. In other embodiments, the cooking utensil with a draining component provided by the present invention can also be used for cooking coarse grains such as corn, purple rice, sorghum, and oats.

[0034] During cooking, the user opens the pot cover 200 and places the food 1A on the grate 2, and then closes the pot cover 200. The heater 301 heats the water contained therein, and when the water temperature reaches a preset temperature, the hot water enters the inner pot body 11 through the first pipe 302 and the connecting hole 112 located on the inner pot body (such as Figure 6 As indicated by the arrow in the middle). However, the present invention does not impose any limitation on this. In other embodiments, the heater body may not be heated during the rice soaking stage, and cold water is used for soaking the rice. Under the action of gravity, the hot water in the inner pot body 11 passes through the grate 2 and the through hole 111 at the bottom of the inner pot body 11 and enters the groove 31. The liquid level in the groove 31 continues to rise and blocks the bottom end of the inner pot body extension 12, and the accommodating space 10 forms a sealed space. As the amount of water entering the groove 31 gradually increases, the pressure in the sealed accommodating space 10 increases, and the pressure blocks the rise of the liquid level in the groove 31, while the liquid level of the water 1B in the inner pot body 11 gradually rises and submerges the food on the grate 2, thereby achieving the immersion of the food in the grate 2.

[0035] When the soaking time reaches the set requirement, the air pressure regulating component 4 reduces the pressure in the accommodating space 10, and the pressure difference between the accommodating space 10 and the inner pot body 11 is reduced. The water in the inner pot body 11 naturally falls under the action of gravity, and the water flows out from the groove 31 and the connecting channel 20 and enters the accommodating space 10. The food 1A on the grate 2 is separated from the water 1B, and the water is drained. Figure 1 As shown, the air pressure regulating assembly 4 is an exhaust valve connecting the accommodating space 10 and the outside of the cooking appliance. In the draining stage, the exhaust valve is opened, and the gas in the accommodating space 10 (such as Figure 7 As shown by the arrow in the middle) enters the exhaust valve through the second pipe 303 (due to the angle problem, Figure 7 The exhaust valve is not visible in the middle), and then discharged to the outside of the cooking appliance. However, the present invention does not impose any limitation on the structure of the air pressure regulating component. In other embodiments, such as in cooking appliances such as electric hot pots, the air pressure regulating component may be an air pump component. When the ingredients on the grate have been soaked for a preset time, the air pump component is turned on, the pressure in the accommodating space is reduced, and the soup in the inner pot body falls into the accommodating space through the grooves and the connecting channels. After the drainage is completed, the air pump component increases the pressure in the accommodating space, and presses the soup in the accommodating space into the inner pot body through the connecting channels and the grooves to soak the ingredients again.

[0036] In the process of making drained rice, the rice needs to be steamed after the draining is completed. In this embodiment, the heating component 300 also includes a second pipe 303 and a three-way valve 304. There is an air hole 32 on the side wall of the outer pot 3, and the second pipe 303 is connected to the air hole 32. The three interfaces of the three-way valve 304 are respectively connected to the heater 301, the second pipe 303 and the first pipe 302. In this embodiment, the exhaust valve as an air pressure regulating component is connected to the second pipe 303. However, the present invention does not make any limitation to this. In other embodiments, the exhaust valve can be arranged on the pot cover and connected to the accommodating space.

[0037] In the rice soaking stage, the air pressure regulating assembly 4 is closed, the three-way valve 304 connects the heater 301 and the first pipe 302, and the hot water enters the inner pot body 11 through the first pipe 302. In the water draining stage, the air pressure regulating assembly 4 is opened. After the water draining is completed and the steaming stage begins, Figure 8 As shown, the air pressure regulating assembly 4 is closed, the three-way valve 304 is connected to the heater 301 and the second pipe 303, and the steam enters the accommodating space 10 through the second pipe 303 (as shown in FIG. Figure 8 (indicated by the arrow in the middle).

[0038] In order to allow steam to enter the inner pot body 11 through the connecting passage 20 and the groove 31, in this embodiment, a protrusion 3a protruding toward the accommodating space 10 is provided on the inner bottom wall of the outer pot 3, and the groove 31 is formed at the top of the protrusion 3a. The setting of the protrusion 3a makes it possible for the water column in the groove 31 to be disconnected from the water in other areas of the accommodating space 10 after the water is drained, and the remaining water in the groove 31 is very small and its liquid level is higher than the water level in other areas of the accommodating space 10. A large amount of steam entering the accommodating space 10 enters the groove 31 through the connecting passage 20, and the pressure presses the small amount of water remaining in the groove 31 back into the inner pot body 11. At the same time, a large amount of steam also vaporizes the small amount of water, and then generates water vapor to enter the inner pot body 11. The steam penetrates the inner pot body 11 and the food, and then is discharged from the steam hole (not shown in the figure due to the viewing angle) on the pot cover 200 to achieve the steaming of rice.

[0039] In this embodiment, the outer bottom wall of the outer pot 3 bulges inwardly following the inner bottom wall, and a recess 33 is formed on the outer bottom wall. The recess 33 provides a space for the arrangement of the second pipe 303. However, the present invention does not make any limitation to this.

[0040] After the rice is steamed for a period of time, the amount of water in the heater 301 is increased, and the three-way valve 304 connects the heater 301 and the first pipe 302. The heater 301 transports the heated high-temperature hot water (for example, 90 degrees) to the inner pot body 11 through the first pipe 302. The liquid level in the inner pot body 11 rises, and the high-temperature hot water submerges the food, and the food is replenished with high-temperature water. After a certain period of high-temperature water replenishment, the air pressure regulating component is opened, and the hot water in the inner pot body 11 falls back and drains again. During the process of high-temperature soaking rice replenishment and draining, the heater 301 continues to heat the remaining water inside it to generate steam. After the draining is completed, the air pressure regulating component 4 is closed and the three-way valve 304 connects the heater 301 and the second pipe 303, and the steam is input into the accommodating space 10 through the second pipe 303, and then enters the inner pot body 11 through the groove 31 and the connecting channel 20 to continue steaming the food.

[0041] During the cooking stage, whether the steam can smoothly enter the inner pot body 11 through the groove 31 is limited by the first distance D1 formed between the opening of the groove 31 and the inner pot body extension 12 and the second distance D2 formed from the bottom end of the inner pot body extension 12 to the bottom of the groove 31. The smaller the first distance D1 and the second distance D2, the greater the resistance to steam entry. However, increasing the first distance D1 and the second distance D2 will cause too much water to remain in the groove 31 after draining the rice, and a large amount of steam will be wasted in the early stage of the cooking stage. To solve this problem, in this embodiment, the width of the groove 31 is gradually increased from bottom to top. On the one hand, this setting increases the first distance D1 formed between the opening of the groove and the inner pot body extension 12, so that the gas entering from the connecting channel 20 can enter the groove 31 well. On the other hand, the inverted trapezoidal structure from bottom to top also makes the volume of the lower area of ​​the groove smaller, greatly reducing the increase in the amount of residual water in the groove caused by increasing the second distance D2, so that the setting of the second distance D2 can well meet the requirements.

[0042] To further facilitate the entry of steam into the inner pot body 11, in this embodiment, the outer wall of the inner pot body 11 is provided with an arc-shaped curved surface. This setting increases the distance between the outer wall of the inner pot body 11 and the top wall of the groove 31, that is, increases the width of the connecting channel 20.

[0043] In this embodiment, by setting the three-way valve 304, hot water is delivered to the inner pot body 11 through the first pipe 302, and steam is delivered to the accommodating space 10 through the second pipe 303. However, the present invention is not limited to this. In other embodiments, such as Fig. 9 As shown, the three-way valve can always be in the state of connecting the heater 301 and the first pipe 302 (or the three-way valve may not be provided, and the output of the heater is only connected to the first pipe). At this time, both hot water and steam are sent into the inner pot body 11 through the first pipe 302. In the cooking stage, the steam hole on the pot cover is closed by the electric valve, and the steam penetrates the food and the grate into the groove, enters the accommodating space 10 through the connecting channel 20, and then enters the exhaust valve through the second pipe 303 and is discharged. At this time, the second pipe 303 is only used to connect the air pressure regulating component 4 and the accommodating space 10.

[0044] In this embodiment, the cooking utensil with a drain assembly further includes a housing 400 covering the outer pot 3, a handle 500 connected to the housing 400, and a base 600 disposed at the bottom of the housing 400 and coupled to the outer pot 3. Further, the cooking utensil with a drain assembly further includes a water pump 700 connected to the heater 301 and a water storage tank 800 disposed on one side of the housing, and the water pump 700 pumps water in the water storage tank 800 into the heater 301. However, the present invention is not limited thereto.

[0045] The cooking utensil with a draining component provided in this embodiment is a rice draining cooking utensil. However, the present invention is not limited to this. In other embodiments, the cooking utensil with a draining component may also be an electric steamer or an electric hot pot. For an electric hot pot, since it does not need to use steam for steaming, there is no need to impose any restrictions on the structure and height of the groove in the draining component, as long as it can meet the requirements of soaking and draining.

[0046] In summary, in the drain assembly and the cooking utensil with the drain assembly provided by the present invention, the bottom of the inner pot body has a through hole and an inner pot body extension, the inner bottom wall of the outer pot has a groove, and the inner pot body extension extends into the groove. When water is poured into the inner pot body, the water enters the groove and blocks the bottom end of the inner pot body extension, the accommodating space is in a sealed state, and the pressure in the accommodating space forms a pressure difference with the atmospheric pressure in the inner pot body. The pressure difference will form a water column in the groove with a liquid level higher than the bottom end of the inner pot body extension and lower than the top of the groove. The water column seals the bottom of the inner pot body, so that the liquid level in the inner pot body continues to rise, so that the food is soaked. After the soaking is completed, the air pressure regulating assembly reduces the pressure in the accommodating space, the pressure difference between the accommodating space and the inner pot body disappears, and the water in the inner pot body falls into the accommodating space through the groove and the connecting channel, so that the drainage is achieved and the food and water are separated.

[0047] In the drain assembly provided by the present invention, the pressure difference during the food soaking stage is naturally formed and the structure for forming the pressure difference is very simple and can be achieved without any external air pressure equipment. This arrangement greatly simplifies the structure of the drain assembly and the cooking utensil and also greatly reduces the cost of the cooking utensil. In the draining stage, the water in the inner pot can be dropped only by reducing the pressure in the accommodating space. Neither the food nor the inner pot needs any movement, and the structure is very simple.

[0048] Although the present invention has been disclosed as above by the preferred embodiment, it is not intended to limit the present invention. Anyone familiar with this technology can make slight changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope of protection required by the claims.

Claims

1. A drain assembly, characterized in that: include: The inner pot comprises an inner pot body and an inner pot body extension portion, wherein the bottom of the inner pot body has a through hole, and the inner pot body extension portion extends toward the outside of the inner pot body along the edge of the through hole; A grate is arranged in the inner pot; The outer pot is sealed and connected to the outside of the inner pot and forms a containing space with the inner pot. The inner bottom wall of the outer pot is provided with a groove, the inner pot body extension part extends into the groove, and a connecting channel is formed between the top of the peripheral wall of the groove and the outer bottom wall of the inner pot body; water is poured into the inner pot body, the water enters the groove and submerges the bottom end of the inner pot body extension part, the containing space is in a sealed state, and the pressure in the containing space forms a water column in the groove with a liquid level higher than the bottom end of the inner pot body extension part and lower than the top of the groove; the liquid level in the inner pot body rises and submerges the food placed on the grate, so that the food is soaked; the inner bottom wall of the outer pot is provided with a raised part protruding into the containing space, and the groove is formed at the top of the raised part. After the drainage is completed, the water column in the groove is not connected with the water in other areas of the containing space, and the steam in the cooking stage can enter the inner pot body through the connecting channel and the groove; The air pressure regulating component is connected to the accommodating space to reduce the pressure in the accommodating space, and the water in the inner pot falls into the accommodating space through the groove and the connecting channel. The air pressure regulating component is an exhaust valve connected to the accommodating space. When the food on the grate is soaked for a preset time, the exhaust valve is opened, the pressure in the accommodating space is reduced, and the water in the inner pot falls into the accommodating space through the groove. The width of the groove increases gradually from bottom to top.

2. The drain assembly according to claim 1, characterized in that: The outer bottom wall of the outer pot bulges inwards following the inner bottom wall, and a recess is formed on the outer bottom wall.

3. The drain assembly according to claim 1, characterized in that: The distance H from the bottom end of the inner pot body extension to the top of the groove is greater than or equal to 2 mm.

4. The drain assembly according to claim 1, characterized in that: The grate comprises a filter screen and a hand-held portion connected to the filter screen. The inner wall of the inner pot body extension portion is provided with a fixed step, and the filter screen is detachably arranged on the fixed step.

5. A cooking utensil with a drain assembly, characterized in that: The cooking utensil comprises the drain assembly according to any one of claims 1 to 4.

6. The cooking utensil with a drain assembly according to claim 5, characterized in that: The cooking utensil is an electric rice cooker, an electric hot pot or an electric steamer.

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