Cooking utensils

Abstract

The present invention provides a cooking utensil, which comprises a pot body, a grate, an air pressure regulating assembly, a conveying assembly and a pot cover. The pot body comprises an outer pot and an inner pot, the inner pot comprises an inner pot body and an inner pot body extension, the bottom of the inner pot body has a through hole, the inner pot body extension extends toward the outside of the inner pot body along the edge of the through hole; the outer pot is sealedly connected to the outside of the inner pot and forms an accommodation space between the inner pot, the inner bottom wall of the outer pot has a protrusion protruding into the accommodation space, the protrusion has a groove, a communication channel is formed between the top of the peripheral wall of the groove and the outer bottom wall of the inner pot body, and the inner pot body extension extends into the groove. The grate is arranged in the inner pot body. The air pressure regulating assembly is connected to the accommodation space to reduce the pressure in the accommodation space. The conveying assembly is connected to the inner pot body to convey water or steam to the inner pot body; the pot cover is opened or closed on the pot body.

Description

Technical Field

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

[0002] At present, most commercially available electric rice cookers use water and rice in the inner pot of the electric rice cooker when cooking, and then use electric heating to automatically complete the cooking after the lid is closed. When using the existing electric rice cooker to cook rice, the starch in the rice is first dissolved in water in large quantities, and the starch is gelatinized and gelled under the action of high temperature. Then, as the water is dried, the gelatinized and gelled starch will be absorbed and attached to the surface of the rice, resulting in soft and sticky rice with poor taste. Since a large amount of starch in the rice is left in the rice soup, the sugar content of the drained rice is low, and the rice grains are dry and full, with a better taste, which is more in line with people's requirements for healthy diet. In the production process of drained rice, the rice is soaked in warm water or high-temperature boiled rice and then drained. After the draining is completed, steam is generated to steam the rice. Therefore, soaking the rice and draining are two important processes for making drained rice.

[0003] There are two main ways to achieve soaking and draining rice in existing rice-draining rice cookers. The first is to set a lifting mechanism inside the rice cooker to drive the inner pot to rise and fall. 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. This drainage method uses a lifting mechanism to separate water from rice. Affected by factors such as the lifting speed of the lifting mechanism, the drainage is not smooth; further, the lifting mechanism needs to occupy a large volume, and the volume of this type of rice-draining rice cooker is very large. The second drainage is mainly controlled by a valve, and the soaking and draining of rice are achieved by closing and opening the valve. In this structure, since the volume of rice grains is very small, the rice grains can easily block the valve when draining, making it impossible to close or open the valve, soaking and draining are not smooth, and it is easy to malfunction. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a cooking utensil with very smooth soaking and draining.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a cooking utensil, which includes a pot body, a grate, an air pressure regulating assembly, a conveying assembly and a pot cover. The pot body includes an outer pot and an inner pot, 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 outer pot is sealed and connected to the outside of the inner pot and forms a containing space between the inner pot, the inner bottom wall of the outer pot has a protrusion protruding into the containing space, the protrusion has a 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, and the inner pot body extension extends into the groove. The grate is arranged in the inner pot body. The air pressure regulating assembly is connected to the containing space to reduce the pressure in the containing space. The conveying assembly is connected to the inner pot body to convey water or steam to the inner pot body; the pot cover is opened or closed on the 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 accommodating space is in a sealed state, and the pressure in the accommodating 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.

[0006] 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.

[0007] According to one embodiment of the present invention, the delivery assembly includes a heater and a first pipe. The heater has an output interface. The input end of the first pipe is connected to the output interface of the heater, and the output end is connected to the inner pot body. The first pipe delivers hot water or steam in the heater to the inner pot body.

[0008] According to one embodiment of the present invention, the delivery assembly includes a second pipeline and a three-way valve, one end of the second pipeline is connected to the accommodating space, three interfaces of the three-way valve are respectively connected to the output interface on the heater, the input end of the first pipeline and the other end of the second pipeline, and the pot cover is provided with an exhaust hole;

[0009] After the draining is completed, the steam generated by the heater is input into the accommodating space through the second pipe, enters the inner pot body through the groove and is discharged from the exhaust hole on the pot cover.

[0010] According to one embodiment of the present invention, the air pressure regulating component is an exhaust valve arranged on the second pipeline. After the drainage is completed, the second pipeline conveys steam and the exhaust valve is closed.

[0011] According to an embodiment of the present invention, the conveying assembly further comprises a heating plate disposed at the bottom of the groove, and the pot cover has an exhaust hole;

[0012] After draining is completed, the air pressure regulating assembly is closed, and the heating plate heats the water in the groove to generate steam, which enters the inner pot and is discharged from the exhaust hole on the pot cover.

[0013] According to an embodiment of the present invention, the cooking appliance further comprises a base and a coupler, the base is connected to the bottom of the outer pot via the coupler, and the conveying assembly and the air pressure regulating assembly are accommodated in the base.

[0014] According to an embodiment of the present invention, the cooking appliance further comprises a water storage component connected to the delivery component, the water storage component comprises a water storage tank and a water pump, and the water pump delivers water in the water storage tank to the delivery component.

[0015] According to an embodiment of the present invention, the grate is detachably connected to the through hole at the bottom of the inner pot body.

[0016] According to an embodiment of the present invention, the outer bottom wall of the outer pot bulges inwardly following the inner bottom wall to form a recess.

[0017] In summary, the pot body of the cooking utensil provided by the present invention comprises an inner pot and an outer pot, the bottom of the inner pot has a through hole and an inner pot extension, the inner bottom wall of the outer pot has a protrusion and a groove on the protrusion, and the inner pot extension extends into the groove. When the conveying component injects water into the inner pot, the water falling into the groove blocks the inner pot extension, and the accommodation space formed between the inner pot and the outer pot is in a sealed state, and the pressure in the accommodation space forms a pressure difference with the atmospheric pressure in the inner pot. The pressure difference will form a water column in the groove with a liquid level higher than the bottom end of the inner pot extension and lower than the top of the groove. The water column seals the bottom of the inner pot, so that the liquid level in the inner pot is continuously raised, so that the rice is soaked. After the rice is soaked, the air pressure regulating component reduces the pressure in the accommodation space, the pressure difference between the accommodation space and the inner pot disappears, and the water in the inner pot falls into the accommodation space through the groove and the connecting channel, so that the water is drained. After the water is drained, the conveying component generates steam to cook the food on the grate. In the cooking device provided by the present invention, when soaking rice, the bottom of the inner pot body can be sealed by utilizing the pressure difference naturally formed between the sealed accommodating space and the inner pot body, and the sealing effect is very good and very simple. After the rice is soaked, the rice can be drained by reducing the pressure difference between the accommodating space and the inner pot body, and the rice draining is very smooth.

[0018] In addition, a heater connected to the first pipe is provided in the conveying assembly. In the initial stage, hot water is generated in the heater and conveyed to the inner pot body through the first pipe to soak the rice. After the rice is soaked, steam is generated in the heater, and the first pipe conveys the steam into the pot body. The steam passes through the through holes and grooves at the bottom of the grate and the inner pot body from top to bottom into the accommodating space, and is finally discharged through the air pressure regulating assembly. In this structure, the heater and the first pipe convey steam while conveying hot water, and the reuse of the pipe greatly simplifies the structure of the cooking utensil. Furthermore, in the cooking utensil provided by the present invention, there are no small parts in the drain channel, which is very convenient for cleaning.

[0019] 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

[0020] Figure 1 Shown is a schematic structural diagram of a cooking utensil provided in Embodiment 1 of the present invention.

[0021] Figure 1A Shown Figure 1 Schematic diagram of the structure from another perspective.

[0022] Figure 1B Shown Figure 1 Schematic diagram of the decomposition.

[0023] Figure 1C Shown Figure 1 sectional view of .

[0024] Figure 1D Shown Figure 1 A cross-sectional view from another perspective.

[0025] Figure 1E Shown Figure 1D A partial enlarged view of point A in the middle.

[0026] Figure 2 The figure shows the structure of the cooking utensil provided in the first embodiment after food is put into it.

[0027] Figure 3 The figure shows a schematic diagram of the structure of the cooking utensil provided in the first embodiment in the state of soaking rice.

[0028] Figure 4 The figure shows a schematic diagram of the structure of the cooking utensil provided in the first embodiment after draining is completed.

[0029] Figure 5 The figure shows a schematic diagram of the structure of the cooking utensil provided in the first embodiment in the steaming state.

[0030] Figure 6 The figure shows a schematic diagram of the structure of the cooking utensil provided in the second embodiment in the steaming state.

[0031] Figure 7 The figure shows a schematic diagram of the structure of the cooking utensil provided in the third embodiment in the steaming state. DETAILED DESCRIPTION

[0032] like Figures 1 to 1CAs shown, the cooking utensil provided in this embodiment includes a pot body 1, a grate 2, an air pressure regulating assembly 8, a conveying assembly 4 and a pot cover 3. The pot body 1 includes an outer pot 11 and an inner pot 12, the inner pot 12 includes an inner pot body 121 and an inner pot body extension 122, the bottom of the inner pot body 121 has a through hole 1211, and the inner pot body extension 122 extends toward the outside of the inner pot body 121 along the edge of the through hole 1211. The outer pot 11 is sealedly connected to the outside of the inner pot 12 and forms an accommodating space 100 with the inner pot 12, the inner bottom wall of the outer pot 11 has a protrusion 111 protruding into the accommodating space, the protrusion 111 has a groove 1111, a communication channel 200 is formed between the top of the peripheral wall of the groove 1111 and the outer bottom wall of the inner pot body 121, and the inner pot body extension 122 extends into the groove 1111. The grate 2 is arranged in the inner pot body 121. The air pressure regulating assembly 8 is connected to the accommodating space 100 to reduce the pressure in the accommodating space 100. The conveying assembly 4 is connected to the inner pot body 121 to convey water or steam to the inner pot body 121; the pot cover 3 is opened or closed on the pot body 1. Water is poured into the inner pot body 121, and the water enters the groove 1111 and submerges the bottom end of the inner pot body extension 122. The accommodating space 100 is in a sealed state, and the pressure in the accommodating space 100 forms a water column in the groove 1111 with a liquid level higher than the bottom end of the inner pot body extension 122 and lower than the top of the groove 1111.

[0033] like Figure 1D and 1E As shown, in this embodiment, the inner wall of the inner pot body extension 122 has a fixed step 122a, and the grate 2 is placed on the fixed step 122a. The grate 2 includes a filter 21 and a handle 22 arranged on the filter 21. 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 122a 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, a flange protruding inward can also be provided in the middle of the inner pot body, and the grate is placed on the flange. In this embodiment, the food 10 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 utility model does not make any limitation to this. In other embodiments, the cooking utensil provided by the present invention can also be used for cooking coarse grains such as corn, purple rice, sorghum, and oats.

[0034] In this embodiment, if Figure 1D and Figure 5The conveying assembly 4 shown includes a heater 41, a first pipe 42, a second pipe 43 and a three-way valve 44. The heater 41 has an output interface 411. The three interfaces 441, 442, 443 of the three-way valve 44 are respectively connected to the output interface 411 on the heater, the input end 421 of the first pipe and one end of the second pipe 43. The other end of the second pipe 43 is connected to the accommodating space 100. The pot cover 3 has an exhaust hole 31.

[0035] Specifically, the side wall of the inner pot body 121 has a connecting hole 1212, and the output end 422 of the first pipe is connected to the connecting hole 1212. The outer pot has an air hole 112, and the other end of the second pipe 43 is connected to the accommodating space 100 through the air hole 112.

[0036] In this embodiment, the cooking appliance further includes a water storage component 6 connected to the heater 41. Specifically, the water storage component 6 includes a water tank 61 and a water pump 62, and the water tank 61 is arranged outside the pot body 1 and is located on one side of the pot body 1. The water pump 62 is connected to the input interface 412 of the heater, and the water pump 62 pumps the water in the water tank 61 into the heater 41. However, the present invention does not make any limitation to this. In other embodiments, the cooking appliance may not include a water storage component, and the heater may also be directly connected to an external water source, such as an external water purifier or an external tap water outlet pipe, and the external water supply equipment directly injects hot water or cold water into the heater.

[0037] Figure 2 The diagram shows the structure of the cooking device after the ingredients are put in. Figure 3 Shown is a schematic diagram of the structure of the cooking utensil in the state of soaking rice. Figure 4 The figure shows a schematic diagram of the structure of the cooking utensil provided in the first embodiment after draining is completed. Figure 5 The diagram shows the structure of the cooking device provided in the first embodiment in the steaming state. Figure 2 and Figure 5 The working principle of the cooking device provided in this embodiment is described in detail.

[0038] During cooking, the user opens the pot cover 3 and places the food 10 on the grate 2, and then closes the pot cover 3. At this time, the space in the inner pot body 121 is connected to the atmosphere. The water pump 62 is started, and the water pump 62 pumps the water in the water tank 61 into the heater 41. The heater 41 heats the water in it. When the water temperature reaches a preset temperature, the three-way valve 44 connects the output interface 411 on the heater and the first pipe 42, and the hot water enters the inner pot body 121 through the first pipe 42 and the connection hole 1212 on the inner pot body (such as Figure 3 However, the present invention does not limit this. In other embodiments, the heater body may not be heated during the rice soaking stage, and cold water may be used to soak the rice.

[0039] In this embodiment, if Figure 3 As shown, under the action of gravity, hot water passes through the grate 2 and the through hole 1211 at the bottom of the inner pot body 121 and enters the groove 1111. The liquid level in the groove 1111 rises continuously and submerges the bottom end of the inner pot body extension 122, and the accommodating space 100 becomes a sealed space. The water entering the groove 1111 compresses the air in the accommodating space 100, and the pressure in the accommodating space 100 gradually increases. The gradually increasing pressure blocks the rise of the liquid level in the groove 1111. The pressure difference between the accommodating space 100 and the inner pot body 121 forms a water column 20 in the groove 1111, and the liquid level of the water column 20 is higher than the bottom end of the inner pot body extension 122 and lower than the top of the groove 1111. The gas in the accommodating space 100 squeezes the water column, and the liquid level of the water column 20 blocks the bottom of the inner pot body 121. The liquid level of the water 30 in the inner pot body 121 gradually rises and submerges the food on the grate 2, thereby soaking the food in the grate 2.

[0040] Preferably, the distance H from the bottom end of the inner pot body extension 122 to the top of the groove 1111 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 122 to the top of the groove 1111 can be set according to the amount of water required to submerge the food in the inner pot body and the size of the accommodating space, 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.

[0041] like Figure 4 As shown, when the soaking time of rice reaches the set requirement, the air pressure regulating component 8 reduces the pressure in the accommodating space 100, the pressure difference between the accommodating space 100 and the inner pot body 121 is reduced, the water in the inner pot body 121 falls naturally under the action of gravity, the water 30 flows out from the groove 1111 and the connecting channel 200 and enters the accommodating space 100, the food on the grate 2 is separated from the water, and the water is drained. In this embodiment, the air pressure regulating component 8 is an exhaust valve installed on the second pipe 43 and connected to the outside of the cooking utensil. In the draining stage, the exhaust valve is opened, and the gas in the accommodating space 100 enters the exhaust valve through the second pipe 43, and then is discharged to the outside of the cooking utensil. However, this embodiment does not limit the specific type of the air pressure regulating component. In other embodiments, the air pressure regulating component can be any component that can reduce the pressure in the accommodating space, such as an exhaust valve.

[0042] While draining, the heater 41 continues to heat the water therein to generate high-temperature steam. At this time, the three-way valve 44 connects the output interface 411 of the heater and the second pipe 43, and the exhaust valve is closed. The high-temperature steam enters the accommodating space 100 through the output interface 411 and the second pipe 43 (such as Figure 5The steam enters the inner pot body 121 through the groove 1111 and the bottom end of the inner pot body extension 122, penetrates the grate 2 and the rice on the grate 2, and finally is discharged from the exhaust hole 31 on the pot cover 3. In this embodiment, the second pipe 43 has two functions. First, it is used to connect the accommodating space 100 and the air pressure regulating component 8 during the draining stage; second, it serves as a steam output channel during the cooking stage to input the steam in the heater 41 into the accommodating space 100.

[0043] In this embodiment, the arrangement of the raised portion 111 on the bottom of the outer pot 11 makes it possible that after the draining is completed, the water column in the groove 1111 is not connected to the water in other areas of the accommodating space 100, and the remaining water in the groove 1111 is very small and its liquid level is higher than the water levels in other areas of the accommodating space 100. This arrangement allows a large amount of steam entering the accommodating space 100 to enter the groove 1111 through the connecting channel 200, and the steam penetrates and vaporizes a small amount of residual water, thereby generating water vapor and entering the inner pot body 121. Further, during the cooking stage, whether the steam can smoothly pass through the accommodating space 100 into the groove 1111 is limited by the first distance D1 formed between the opening of the groove 1111 and the inner pot body extension 122 and the second distance D2 formed from the bottom end of the inner pot body extension 122 to the bottom of the groove 1111. The smaller the first distance D1 and the second distance D2, the greater the resistance to the passage of steam. However, increasing the first spacing D1 and the second spacing D2 will cause too much water to remain in the groove 1111 after draining the rice, and too much residual water will also block the passage of steam. To solve this problem, in this embodiment, the width of the groove 1111 is set to gradually increase from bottom to top. On the one hand, this setting increases the first spacing D1 formed between the opening of the groove and the inner pot body extension 122, so that the steam can enter the groove 1111 well. On the other hand, the inverted trapezoidal structure from bottom to top makes the volume of the lower area of ​​the groove 1111 smaller, effectively reducing the increase in the amount of residual water in the groove caused by increasing the second spacing D2, and the steam can penetrate the residual water well and vaporize the residual water.

[0044] After the high-temperature steam cooking is performed for a preset time, the water pump 62 pumps the water in the water tank 61 into the heater 41, and the heater 41 continues to heat. When the water in the heater 41 reaches a preset high temperature (for example, 90 degrees), the three-way valve 44 connects the output interface 411 on the heater and the first pipe 42, and the high-temperature hot water enters the inner pot body 121 through the first pipe 42. Under the action of gravity, the high-temperature hot water enters the groove and compresses the gas in the closed accommodating space 100. The pressure difference between the accommodating space 100 and the inner pot body 121 forms a water column 20 in the groove 1111, and the liquid level of the water column 20 is higher than the bottom end of the inner pot body extension 122 and lower than the top of the groove 1111. The liquid level in the inner pot body 121 rises, and the high-temperature hot water submerges the food 10, and the food 10 is replenished with high-temperature water. After a certain period of high-temperature water replenishment, the exhaust valve is opened, and the hot water in the inner pot body 121 falls back, realizing the separation of water and rice. Afterwards, the three-way valve 44 connects the output interface 411 of the heater and the second pipe 43, and the exhaust valve is closed. The heater 41 continues to heat and generate high-temperature steam, which enters the inner storage space 100 through the second pipe 43 and enters the inner pot body 121 through the connecting channel 200 and the groove 1111, and steams the rice in the inner pot body 121.

[0045] During the rice cooking process, the present invention does not impose any restrictions on the number of high-temperature water replenishment. In other embodiments, it can be set that no high-temperature water replenishment is required or multiple high-temperature water replenishment is performed. Similarly, for the rice soaking process before cooking, in other embodiments, the rice can also be soaked multiple times. For example, the first soaking time is very short and is only used to wash the rice grains; after the washing is completed, the rice is soaked for the second time, and the rice grains absorb water in this process.

[0046] In the cooking device provided in this embodiment, the pressure difference in the rice soaking stage is naturally formed and the structure for forming the pressure difference is very simple, which can be achieved without the aid of any external air pressure equipment. This arrangement greatly simplifies the structure of the cooking device and also greatly reduces the cost of the cooking device. In the rice draining stage, the water is drained by changing the pressure in the accommodating space 100. There is no mechanical valve in the water draining channel, and there is no problem of failure caused by rice grains blocking the mechanical valve. The safety performance of the product is very high.

[0047] In this embodiment, if Figures 1 to 1CAs shown, the cooking utensil further comprises a base 5 and a coupler 7, and the base 5 is connected to the bottom of the outer pot 11 through the coupler 7. Specifically, the pot body 1 further comprises a bottom shell 13 arranged at the bottom of the outer pot 11, a shell 14 arranged outside the outer pot 11, and a hand-held portion 15 arranged on the shell 14. The base 5 comprises a base upper cover 51 and a base lower cover 52, and a storage area is formed between the base upper cover 51 and the base lower cover 52, and the water pump 62, the heater 41 and the air pressure regulating assembly 8 are all accommodated in the storage area in the base. The coupler 7 comprises an upper coupler 71 arranged on the bottom shell 13 and a lower coupler 72 arranged on the base upper cover 51. The control panel (not shown) located on the pot cover 3 is electrically connected to the water pump 62, the heater 41 and the air pressure regulating assembly through the upper coupler 71 and the lower coupler 72. However, the present invention does not make any limitation to this. In other embodiments, when the control panel is arranged in the base, the coupler may not be arranged.

[0048] In this embodiment, the second pipe 43 passes through the upper coupler 71 and the lower coupler 74 and is connected to the three-way valve 44 and the exhaust valve contained in the base 5 respectively. In order to facilitate the arrangement of the second pipe 43, in this embodiment, the outer bottom wall of the outer pot 11 bulges inwardly following the inner bottom wall to form a recess 11a, and the recess 11a reserves space for the arrangement of the second pipe 43. However, the present invention does not make any limitation to this. In other embodiments, the air pressure regulating component can be arranged on the pot cover and communicated with the accommodating space through a joint.

[0049] In order to facilitate the cleaning of the inner pot 12, in this embodiment, a detachable connection is provided between the inner pot 12 and the first pipe 42. Figure 1B As shown, the first pipe 42 includes a first pipe extension section 42a and a first pipe connection section 42b. The end of the first pipe extension section 42a is connected to the heater 41 and extends upward along the base 5 into the gap between the outer pot 11 and the outer shell 14. The first pipe connection section 42b is arranged in the handheld portion 15, one end of the first pipe connection section 42b is connected to the first pipe extension section 42a, and the other end is sealed and docked with the connection hole 1212 on the inner pot body 121. When the user needs to clean the inner pot, the inner pot 12 is lifted up, and the end of the first pipe connection section 42b is separated from the connection hole 1212; the first pipe connection section 42b is arranged in the handheld portion 15, and it will not move with the inner pot 12. Preferably, a mark position corresponding to the connection hole 1212 can also be set on the inner pot. After the inner pot body is cleaned, the user can quickly achieve the docking of the connection hole 1212 and the first pipe connection section 42b according to the mark position.

[0050] Embodiment 2

[0051] This embodiment is basically the same as the first embodiment and its variations, except that: Figure 6As shown, the conveying assembly 4 includes a heater 41, a first pipe 42 and a second pipe 43, and an electric valve is also provided on the pot exhaust hole 31 (due to viewing angle, not shown in the figure). In this embodiment, the hot water and steam output in the rice soaking stage and the steaming stage are input into the inner pot body 121 through the first pipe 42. The second pipe 43 is only used to connect the accommodating space 100 and the air pressure regulating assembly 8. However, the present invention does not impose any limitation on the setting position of the air pressure regulating valve. In other embodiments, the air pressure regulating assembly can also be arranged in the pot cover and connected to the accommodating space. In this case, there is no need to set a second pipe.

[0052] In the rice soaking stage of the cooking device provided in this embodiment, hot water is transported to the inner pot body 121 through the first pipe 42 to soak the rice, and after the rice soaking is completed, the air pressure regulating component 8 reduces the pressure in the accommodating space 100 to achieve water drainage. The process of soaking and draining is the same as that of the first embodiment, and will not be described in detail here.

[0053] During the draining process, the heater 41 continues to heat the water therein to generate high-temperature steam. After the draining is completed, the air pressure regulating assembly 8 is closed and the electric valve closes the exhaust hole 31 on the pot cover, and the high-temperature steam enters the inner pot body 121 through the output interface 411 and the first pipe 42 (such as Figure 6 The steam penetrates the rice on the grate 2 and the grate 2 and enters the groove 1111, enters the accommodating space 100 through the connecting passage 200, and is finally discharged through the second pipe 43 and the air pressure regulating assembly 8.

[0054] In this embodiment, the arrangement of the raised portion 111 makes it so that after the draining is completed, the water column in the groove 1111 is not connected to the water in other areas of the accommodating space 100, and the remaining water in the groove 1111 is very little and its liquid level is higher than the water levels in other areas of the accommodating space 100. A large amount of steam entering the groove 1111 penetrates the small amount of remaining water and enters the accommodating space 100 through the connecting channel 200, and vaporizes the small amount of remaining water in the process of penetration. Similarly, the structure of the groove 1111 with a gradually increasing width from bottom to top, on the one hand, increases the first distance D1 formed between the opening of the groove 1111 and the inner pot body extension 122, so that the gas in the groove 1111 can enter the accommodating space 100 well through the connecting channel 200. On the other hand, the inverted trapezoidal structure from bottom to top also makes the volume of the lower area of ​​the groove smaller, effectively reducing the increase in the amount of remaining water in the groove caused by increasing the second distance D2, and the steam can penetrate and vaporize the remaining water well.

[0055] Similarly, during the cooking process, the water pump 62 pumps the water in the water tank 61 into the heater 41, and the heater 41 heats the water therein to a preset high temperature (for example, 90 degrees) and then performs high-temperature water replenishment. The method of high-temperature water replenishment is the same as in Example 1 and will not be repeated here.

[0056] In the cooking appliance provided in this embodiment, the first pipeline 42 realizes the reuse of the water circuit and the steam circuit, further simplifying the structure of the cooking appliance.

[0057] Embodiment 3

[0058] This embodiment is basically the same as the first embodiment and its variations, except that: Figure 7 As shown, the conveying assembly 4 includes a heater 41, a first pipe 42, a second pipe 43, and a heating plate 45 disposed at the bottom of the groove 1111. After the draining is completed, the air pressure regulating assembly 8 is closed, and the heating plate 45 heats the water in the groove 1111 to generate steam, and the steam enters the inner pot body 121 and is discharged from the exhaust hole on the pot cover 3, as shown in FIG. Figure 7 Indicated by the arrow.

[0059] In this embodiment, the steam is generated by the heating plate 45 located at the bottom of the groove 1111, and the heater is only used to generate warm water for soaking rice or high-temperature hot water for replenishing water. However, the present invention is not limited to this. In other embodiments, the heater may not be provided in the conveying assembly, and the first pipeline is directly connected to the external hot water pipe or cold water pipe.

[0060] In this embodiment, the second pipe 43 is only used to connect the accommodating space 100 and the air pressure regulating assembly 8 .

[0061] In summary, the pot body of the cooking utensil provided by the present invention comprises an inner pot and an outer pot, the bottom of the inner pot has a through hole and an inner pot extension, the inner bottom wall of the outer pot has a protrusion and a groove on the protrusion, and the inner pot extension extends into the groove. When the conveying component injects water into the inner pot, the water falling into the groove blocks the inner pot extension, and the accommodation space formed between the inner pot and the outer pot is in a sealed state, and the pressure in the accommodation space forms a pressure difference with the atmospheric pressure in the inner pot. The pressure difference will form a water column in the groove with a liquid level higher than the bottom end of the inner pot extension and lower than the top of the groove. The water column seals the bottom of the inner pot, so that the liquid level in the inner pot is continuously raised, so that the rice is soaked. After the rice is soaked, the air pressure regulating component reduces the pressure in the accommodation space, the pressure difference between the accommodation space and the inner pot disappears, and the water in the inner pot falls into the accommodation space through the groove and the connecting channel, so that the water is drained. After the water is drained, the conveying component generates steam to cook the food on the grate. In the cooking device provided by the present invention, when soaking rice, the bottom of the inner pot body can be sealed by utilizing the pressure difference naturally formed between the sealed accommodating space and the inner pot body, and the sealing effect is very good and very simple. After the rice is soaked, the rice can be drained by reducing the pressure difference between the accommodating space and the inner pot body, and the rice draining is very smooth.

[0062] In addition, a heater connected to the first pipe is provided in the conveying assembly. In the initial stage, hot water is generated in the heater and conveyed to the inner pot body through the first pipe to soak the rice. After the rice is soaked, steam is generated in the heater, and the first pipe conveys the steam into the pot body. The steam passes through the through holes and grooves at the bottom of the grate and the inner pot body from top to bottom into the accommodating space, and is finally discharged through the air pressure regulating assembly. In this structure, the heater and the first pipe convey steam while conveying hot water, and the reuse of the pipe greatly simplifies the structure of the cooking utensil. Furthermore, in the cooking utensil provided by the present invention, there are no small parts in the drain channel, which is very convenient for cleaning.

[0063] 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 cooking utensil, characterized in that: include: A pot body, comprising an outer pot and an inner pot, wherein the inner pot comprises an inner pot body and an inner pot body extension, wherein a through hole is provided at the bottom of the inner pot body, and the inner pot body extension extends toward the outside of the inner pot body along the edge of the through hole; the outer pot is sealedly connected to the outside of the inner pot and forms an accommodation space with the inner pot, a convex portion protruding toward the accommodation space is provided on the inner bottom wall of the outer pot, a groove is provided on the convex portion, and the width of the groove gradually increases from bottom to top, a communication channel is formed between the top of the peripheral wall of the groove and the outer bottom wall of the inner pot body, and the inner pot body extension extends into the groove; A grate is arranged in the inner pot; An air pressure regulating component is connected to the accommodating space to reduce the pressure in the accommodating space, and the air pressure regulating component is an exhaust valve; a conveying assembly, connected to the inner pot body, for conveying water or steam to the inner pot body; and A pot cover, opened or closed on the 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 accommodating space is in a sealed state, and the pressure in the accommodating 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 water column seals the bottom of the inner pot body, so that the liquid level in the inner pot body is continuously raised to achieve soaking of rice; after the drainage is completed, the water column in the groove is not connected with the water in other areas of the accommodating space, and the steam in the cooking stage can enter the inner pot body through the connecting channel and the groove; The conveying component includes a heater and a first pipe, the heater has an output interface, the input end of the first pipe is connected to the output interface of the heater, and the output end is connected to the inner pot body; the first pipe conveys the hot water or steam in the heater to the inner pot body, and the steam passes through the grate and the through holes and grooves at the bottom of the inner pot body from top to bottom into the accommodating space, and is finally discharged through the air pressure regulating component.

2. The cooking device 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.

3. The cooking device according to claim 1, characterized in that: The conveying assembly includes a second pipeline and a three-way valve, one end of the second pipeline is connected to the accommodating space, three interfaces of the three-way valve are respectively connected to the output interface on the heater, the input end of the first pipeline and the other end of the second pipeline, and the pot cover is provided with an exhaust hole; After the draining is completed, the steam generated by the heater is input into the accommodating space through the second pipe, enters the inner pot body through the groove and is discharged from the exhaust hole on the pot cover.

4. The cooking device according to claim 1, characterized in that: The conveying assembly also includes a heating plate arranged at the bottom of the groove, and the pot cover is provided with an exhaust hole; After draining is completed, the air pressure regulating assembly is closed, and the heating plate heats the water in the groove to generate steam, which enters the inner pot and is discharged from the exhaust hole on the pot cover.

5. The cooking device according to claim 1, characterized in that: The cooking appliance further comprises a base and a coupler, wherein the base is connected to the bottom of the outer pot through the coupler, and the conveying assembly and the air pressure regulating assembly are accommodated in the base.

6. The cooking device according to claim 1, characterized in that: The cooking appliance further comprises a water storage component connected to the conveying component, wherein the water storage component comprises a water storage tank and a water pump, and the water pump conveys water in the water storage tank to the conveying component.

7. The cooking device according to claim 1, characterized in that: The grate is detachably connected to the through hole at the bottom of the inner pot body.

8. The cooking device according to claim 1, characterized in that: The outer bottom wall of the outer pot bulges inwards following the inner bottom wall to form a recess.

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