WO2023103775A1 - 一种易清洗电饭煲 - Google Patents

一种易清洗电饭煲 Download PDF

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Publication number
WO2023103775A1
WO2023103775A1 PCT/CN2022/133703 CN2022133703W WO2023103775A1 WO 2023103775 A1 WO2023103775 A1 WO 2023103775A1 CN 2022133703 W CN2022133703 W CN 2022133703W WO 2023103775 A1 WO2023103775 A1 WO 2023103775A1
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WIPO (PCT)
Prior art keywords
pot
inner container
air
rice
wall
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Application number
PCT/CN2022/133703
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English (en)
French (fr)
Inventor
朱泽春
李扬
于凌振
王涛
Original Assignee
九阳股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from CN202211314733.3A external-priority patent/CN115606988A/zh
Priority claimed from CN202111511407.7A external-priority patent/CN114403686B/zh
Priority claimed from CN202123033724.0U external-priority patent/CN216724121U/zh
Application filed by 九阳股份有限公司 filed Critical 九阳股份有限公司
Publication of WO2023103775A1 publication Critical patent/WO2023103775A1/zh

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels

Definitions

  • the application belongs to the technical field of kitchen utensils, and in particular relates to an easy-to-clean electric rice cooker.
  • the existing electric rice cooker will set a layer of non-stick coating on the inner surface of the inner pot.
  • the non-stick effect of the inner pot cannot be achieved for a long time, and the peeled coating is easy to mix into the rice and be eaten by mistake, which affects human health.
  • the base of the inner pot will be exposed, so that the base is directly exposed to high temperature and high temperature during cooking. In a wet cooking environment, it will affect food hygiene and safety, so when the coating falls off, the liner is not suitable for continued use.
  • the liner is made without coating (as the inner surface of the liner is made of stainless steel), it is easy for the rice to stick to the pan, and the rice spoon is not easy to shovel off the sticky rice on the surface of the liner when the rice is served.
  • the application provides an easy-to-clean electric rice cooker to solve the problem of poor non-stick effect of the electric rice cooker without coating.
  • An easy-to-clean electric rice cooker comprising a pot body, a pot cover, an inner container for cooking rice, a heating device, and a cooling fan.
  • the lid On the device, the lid is fastened to close the accommodating cavity and the inner pot to form a cooking cavity.
  • the inner pot is cooled by the cooling fan, and the part of the lower part of the inner pot that contacts the rice cools down to form condensed water, which infiltrates and adheres to the inner wall of the inner pot.
  • the combined rice there is a first air outlet at the junction of the pot cover and the pot body, there is a joint gap between the pot cover and the pot body, and the joint gap forms the first air vent, and the cold air cools the inner container After that, it is discharged through the first air outlet.
  • Fig. 1 is the sectional view of described electric cooker under one embodiment of the present application
  • Fig. 2 is a state view of the electric cooker with the cover opened under one embodiment of the present application;
  • Fig. 3 is a partial schematic view of the portion of the inner container in contact with rice in one embodiment of the present application;
  • Fig. 4 is a partial schematic diagram of the junction of the lower lid and the body of the pot in an embodiment of the present application;
  • Fig. 5 is a schematic diagram of a second exhaust port in an embodiment of the present application.
  • Fig. 6 is a schematic diagram of an inner container according to an embodiment of the present application.
  • Fig. 7 is a schematic diagram of an inner container with a spherical inner wall in an embodiment of the present application.
  • Fig. 8 is a schematic diagram of an inner tank with grooves in an embodiment of the present application.
  • Fig. 9 is a partially enlarged schematic diagram of the cooling fan on the thermal insulation inner cover in an embodiment of the present application.
  • FIG. 10 is a schematic diagram of a cooling fan in an embodiment of the present application.
  • Fig. 11 is a cross-sectional view of the electric rice cooker of Embodiment 2 of the present application.
  • Figure 12 is a partially enlarged view in Figure 1;
  • Fig. 13 is a perspective view of an electric rice cooker according to Embodiment 2 of the present application.
  • Fig. 14 is a schematic diagram 1 of the heating plate in Embodiment 2 of the present application.
  • Fig. 15 is a second schematic diagram of the heating plate in the second embodiment of the present application.
  • cooling fan 41 air guide vane; 42 air guide channel; 43 air guide surface; 44 upper air guide vane; 45 lower air guide vane; 46 air guide gap; 421 first air guide channel; 422 second air guide channel;
  • Pot body 1 shell 11, heat preservation cover 12, cooling air inlet 13, air inlet 14, heating plate 2, through hole 21, connection terminal 22, retaining rib 23, wind deflector 24, liner 3, cooling fan 4, the second A gap 5, a second gap 6, a ventilation gap 7, and an air duct 8.
  • a first feature being "on” or “under” a second feature may mean that the first and second features are in direct contact, or that the first and second features are indirect through an intermediary. touch.
  • descriptions referring to the terms “implementation”, “embodiment”, “an embodiment”, “example” or “specific example” mean specific features described in conjunction with the embodiment or example, A structure, material or characteristic is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
  • the pot body 10 includes an accommodating cavity 106, the inner pot 30 is placed in the accommodating cavity 106 and located on the heating device 105, the pot cover 20 is fastened to close the accommodating cavity 106 and the inner pot 30 to form a cooking cavity 301, and the pot body 10 includes an air inlet 108 of the thermal insulation inner cover 101, the cooling fan 40 is located at the air inlet 108, there is a thermal insulation gap 107 between the outer wall of the inner tank 30 and the inner wall of the thermal insulation inner cover 101, and the air inlet 108 is provided toward the lower part of the inner tank.
  • the 302 is used to reduce the air inlet angle of the cold air entering the thermal insulation gap 107.
  • the cold air entering the air inlet 108 circulates around the inner tank 30 from bottom to top to cool the lower part 302 of the inner tank, and the part of the lower part 302 of the inner tank that contacts the rice 50 cools down , the water vapor in the rice 50 condenses toward the inner wall of the lower part 302 of the inner container 302 that contacts the inner wall of the rice 50 to form condensed water 60 , and the condensed water 60 infiltrates the rice 50 attached to the inner wall of the inner container 30 .
  • the pot lid 20 and the pot body 10 can be hingedly arranged, or can be separately arranged, and the user can take and put the inner container 30 for cooking rice or rice by opening the pot lid 20 and closing the pot lid 20.
  • the heating is realized through the heating device 105 at the bottom.
  • the heating device 105 is an electromagnetic coil.
  • the bottom side of the thermal insulation inner cover 101 has a bottom opening, and the electromagnetic coil is connected to the bottom opening, so that the electromagnetic coil is directly connected to the thermal insulation inner cover 101, and the thermal insulation inner cover 101 and the electromagnetic coil are combined.
  • the accommodating cavity 106 at this time, after the lid 20 is closed, the accommodating cavity 106 has no space except the junction of the lid 20 and the body 10, and the temperature measuring hole and the leaking hole at the bottom can communicate with the external space.
  • the entire accommodating cavity 106 is relatively closed, and if the heating device 105 is a heating plate, then the entire accommodating cavity 106 will have more openings at the bottom relatively, such as for connecting terminals to protrude Avoidance hole etc. of thermal insulation inner cover 101.
  • the pot body 10 also includes a pot ring 104, an outer pot shell 102 and a base 103.
  • the outer pot shell 102 is arranged on the outside of the thermal insulation inner cover 101.
  • the pot ring 104 is connected to the base 103.
  • the outer pot shell 102 is arranged between the pot ring 104 and the base 103
  • the thermal insulation inner cover 101 is arranged on the pot ring 104
  • the inner cavity 114 is between the outer pot shell 102 and the thermal insulation inner cover 101 .
  • the base 103 is provided with an air suction port 109 , and the cooling fan 40 can suck air through the air suction port 109 on the base 103 .
  • an air suction port 109 may be provided on the outer pot shell 102 at a position corresponding to the height of the air inlet port 108 .
  • the liner 30 includes a liner waist 303, a liner bottom 302 and a liner top 304; the diameter of the liner waist 303 is greater than the liner bottom 302, and in some embodiments, the diameter of the liner waist 303 is also greater than
  • the upper part 304 of the liner and the lower part 302 of the liner include arc-shaped side walls 306 and flat bottom walls 307 , and the specific shape of the liner will be described in detail below.
  • the cooling fan 40 works, inhales cold wind through the air inlet 108, and sends air toward the accommodating cavity 106, and the air outlet direction of the air inlet 108 is at a certain angle with the vertical direction of the pot body 10, so that the air inlet 108 is set There is an air inlet angle toward the lower part 302 of the liner to reduce the wind resistance of the cold air entering the insulation gap 107. After the cold air with a certain angle of entry enters the insulation gap 107, the cold air circulates around the inner container from top to bottom to cool the lower part 302 of the inner container.
  • the high-temperature water vapor in the rice will condense on the inner wall of the part of the inner container lower part 302 that contacts the rice, and the condensed water formed by condensation will infiltrate the rice that is attached to the inner wall of the inner container.
  • the temperature difference between the inside and outside of the gallbladder 30 is low on the outside and high on the inside, that is, the temperature gradually increases from the outside to the inside. Therefore, the condensed water can continue to infiltrate the rice on the inner wall of the part that contacts the rice, so as to avoid non-sticking and facilitate cleaning.
  • a certain air inlet angle can reduce the wind resistance entering the thermal insulation gap 107, increase the air intake, and at the same time make the cold wind cool the lower part 302 of the inner tank first, and the cold wind circulates around the inner tank from bottom to top to cool the lower part 302 of the inner tank, that is, the cold wind First blow down from the inner tank waist 303 until it surrounds the lower part 302 of the inner tank.
  • the inner tank waist 303 is often larger in diameter, the diameter of the inner tank shrinks gradually as it goes down.
  • the airflow moves downward, the closer it is The bottom of the inner tank 30 has a small surface area, and when the airflow moves upward, the farther away from the bottom of the inner tank 30, the larger the surface area;
  • the arc gradually increases, and when moving from the center line to the right, the arc gradually decreases.
  • the airflow moves to the left and right, the airflow that has just flowed out from the air inlet 108 is closer to the center line side of the inner tank 30, and the surface area gradually increases and crosses the center line. Later, as the distance from the side of the center line becomes farther away, the surface area gradually decreases.
  • a certain wind inlet angle makes the cold wind first go down and then go up to surround the lower part 302 of the inner tank, so that the airflow mainly flows in the vertical direction instead of the horizontal direction.
  • the path of the cold wind in the vertical direction going down first and then going up when the airflow blown out of the air inlet 108 moves downward, a convergence effect is formed due to the gradual decrease of the surface area; when the airflow moves upward, the surface area gradually increases to form a diffusion effect, converging
  • the effect makes the cold air contact with the inner tank 30, the first contact area is large, and then the contact area is small, so that the cold air can have a large contact area and absorb more heat when it is relatively colder, so that it can have a larger contact area when it is relatively hotter after converging.
  • the small contact area absorbs lower heat, avoiding the excessive heat absorption at the small contact area due to the overcooling of the cold air at the confluence, which leads to the uneven formation of condensed water in various parts that contact the rice; when passing through the converging effect Afterwards, the cold air has heated up. On this basis, when it spreads upwards, it will not absorb more heat at the small contact area, causing the problem of uneven cooling.
  • a first air outlet 110 is provided at the joint of the pot cover 20 and the pot body 10, and there is a joint gap between the pot cover 20 and the pot body 10, the combination The gap forms a first air outlet 110 , and the cold air is discharged through the first air outlet 110 after cooling the inner container 30 .
  • Exhausting air through the first air outlet 110 relatively speaking means that the bottom and side walls of the accommodating chamber 106 are closed as much as possible to reduce the opening of holes and prevent airflow from leaving the bottom and side walls.
  • the heating device 105 is the above-mentioned electromagnetic coil, and the electromagnetic coil is installed at the bottom opening of the thermal insulation inner cover 101 .
  • the inner pot 30 is placed in the accommodating cavity 106 of the pot body 10 , and the heating device 105 is arranged on the lower side of the heat preservation inner cover 101 , and there is a bottom gap 111 between the heating device 105 and the inner pot 30 , in order to form the bottom gap 111, the inner tank 30 has an inner tank flange 305, and the joint between the inner tank flange 305 and the pot body 10 has an air outlet channel 112, and the airflow in the heat preservation gap 107 passes through the outlet The air channel 112 enters the first air outlet 110 .
  • the air outlet channel 112 is set so that the air flow can change the direction of the air flow under the obstruction of the flange 305 of the inner tank, so that the hot air can enter the first air outlet 110 more conveniently and be discharged.
  • a second air outlet 113 is provided on the side of the cooling fan 40, and the second air outlet 113 communicates with the heat preservation inner cover 101 and the outer heat preservation cover 101.
  • the inner cavity 114 between the pot shells 102, the bottom of the pot body 10 is provided with a cooling hole connected to the inner cavity 114, after the cold air cools the inner tank 30, it is discharged into the air through the second air outlet 113 The inner cavity 114 is discharged through the heat dissipation holes.
  • the side means that it is set close to the cooling fan 40, and the distance from the cooling fan 40 is not more than 10 cm.
  • the height position of the second air outlet 113 can be flush with the cooling fan 40.
  • the orientation of the second row of air outlets 113 can be located in other positions.
  • the pot ring 104 is provided with a support 115 , the support 115 is arranged at the matching place, and the inner tank 30 is supported on the support 115 to form the air outlet channel 112 .
  • the process of condensed water formation requires cooling time, and the cooling time should not be too long.
  • the method that can be adopted is to reduce the surface area of the part of the inner container bottom 302 that contacts the rice as much as possible, thereby reducing the amount required for forming condensed water for infiltration. power.
  • the temperature of the inner tank 30 is about 100-110°C, and the temperature of the rice is 100°C.
  • the estimation process considers that the sum of the heat released by the cooling of the inner tank 30 and the heat released by the condensation of water vapor is equal to the heat taken away by the cooling fan 40 .
  • ⁇ T of the inner tank is set at 15° C.
  • the temperature of the cold air rises at ⁇ T air is set at 30° C.
  • the time required to form condensed water is (Q liner + Q water layer)/Q air;
  • the cooling time of about 4 minutes can form a condensed water layer, and the extended time of 4 minutes is within the acceptable range of rice cooking. It can be added to rice cooking.
  • the fan with a flow rate of 150L/min is about 50mm in diameter. A small fan can be realized, so this scheme has high applicability.
  • the material, shape, and weight of the inner tank affect the area of the water layer, the specific heat capacity of the inner tank, the quality of the inner tank, and the temperature rise of the cold air. Therefore, the cooling time can be controlled by improving the structure of the inner tank.
  • the outer sidewall of the lower part 302 of the liner has an arc-shaped sidewall 306 and a flat bottom wall 307, and the inner sidewall of the inner lower part of the arc-shaped sidewall 306 corresponds to the arc shape.
  • the part of the side wall and the parallel bottom wall is a spherical inner wall 308; the spherical inner wall 308 can minimize the surface area of the portion of the inner container bottom 302 contacting the rice, thereby minimizing the cooling time.
  • the arc-shaped side wall 306 means that the section of the outer wall of the inner tank in the up-and-down direction is arc-shaped, and the arc-shaped side wall 306 rotates around the axis to form an arc surface.
  • the arc-shaped arcs can be arcs with different curvatures, rather than arcs with the same curvature.
  • the curved surface of the lower part 302 of the liner can be an aspherical surface;
  • the flat bottom wall 307 is used for the liner to be placed flat on the table, and the flat bottom wall 307 means that the outer wall of the liner is set horizontally.
  • the wall thickness B1 between the spherical inner wall 308 and the flat bottom wall 307, the wall between the spherical inner wall 308 and the arc-shaped side wall 306 The thickness is B2, and the B1 ⁇ B2.
  • B1 and B2 can be the minimum thickness or the average thickness.
  • the thickness of the gallbladder wall ranges from 0.5 to 10mm, which can be set according to the situation.
  • the inner gallbladder with "flat outside and curved inside" Be as light and thin as possible to reduce the weight of the inner tank, thereby reducing the heat storage capacity of the inner tank, so as to facilitate the cooling of the inner tank and quickly form condensed water.
  • the inner container is mostly formed by stamping forming technology, so that the wall thickness of the inner container will remain consistent, and the shape of the inner and outer walls will also remain consistent.
  • the inner container The lower part 302 has a flat bottom 310 with both inner and outer walls arranged horizontally.
  • the surface area of the inner wall of the flat bottom 310 is smaller than the surface area of its outer wall.
  • the surface area of the outer wall of the flat bottom 310 will be increased, which will increase the temperature rise of the cold air, thereby increasing the heat taken away by the cold air per minute, thereby shortening the cooling time.
  • grooves 309 or protrusions can also be provided on the arc-shaped side wall 306 or the flat bottom wall 307, thereby increasing the surface area of the outer side of the lower part 302 of the liner, which will make the liner “flat on the outside and curved on the inside” The difference between the inner and outer surfaces is further increased, forming the setting of "big outside and small inside” for the part of the rice contact, so as to speed up the formation of condensed water.
  • the cooling fan 40 In order to improve the cooling effect, it can also be realized by adjusting the air volume of the cold air.
  • the cooling fan 40 due to the existence of air duct resistance, assuming that the rated air volume is 200L/min, the actual loss will make the air volume drop below 200L/min. Therefore, the air intake resistance can be reduced to increase the air volume, thereby reducing the cooling time.
  • the air inlet 108 is provided with an air guide vane 41 and an air guide channel 42, the air guide vane 41 makes the cold wind entering the heat preservation gap 107 of the air inlet 108 have an inlet angle, preferably, the air guide vane 41 enters
  • the air inlet angle of the thermal insulation gap 107 is between 10-20 degrees, which is the angle between the tangential direction of the air guide vane 41 at the air inlet 108 and the vertical direction of the thermal insulation inner cover 101 .
  • the wind inlet angle is 18 degrees, and in some alternative embodiments, the included angle may be 10, 12, 15, 20 degrees, etc.
  • the air inlet angle is less than 10 degrees, it will make the air guide channel 42 difficult to mold and difficult to process; if it is greater than 20 degrees, more cold air will act on the inner tank wall, thereby increasing the wind resistance.
  • the air guide plate 41 has an air guide surface 43, and the air guide surface 43 extends in an arc from the side of the cooling fan 40 to the side of the heat preservation gap 107, so that when the cold wind blown by the cooling fan 40 passes through the air guide plate 41, The cold air can smoothly transition from the horizontal direction to the preset air inlet angle to enter the thermal insulation gap 107, avoiding the loss of air volume caused by the unreasonable design of the air guide vane 41, and further reducing the wind resistance passing through the air guide vane 41, Thereby increasing the air intake, thereby improving the cooling efficiency.
  • the projections along the horizontal direction of the upper wind guide vane 44 and the lower wind guide vane 45 constituting the air guide channel 42 do not overlap.
  • the existence of the air guide gap 46 will facilitate the forming of the air guide vane 41 , and at the same time, it can also reduce the wind resistance of the air guide channel 42 .
  • the air guide channel 42 includes a first air guide channel 421 for supplying cold air to the side wall of the liner 30 , and a second air guide channel 422 for supplying cold air to the insulation gap 107
  • Each air guide channel 42 is located at the height position of the arc-shaped side wall 306 of the inner container bottom 302, wherein the first air guide channel 421 is located at the largest bile diameter of the inner container bottom 302, and its air inlet angle intersects with the arc-shaped side wall 306 , so that the cold air in the first air guiding channel 421 can be blown to the waist 303 position of the liner, because the side wall at the waist position has a large diameter, so the surface area is large, and the air is blown and cooled here through part of the air guiding channel to facilitate the formation of convergence Effect, in order to ensure the cooling uniformity of the lower part 302 of the liner, the air inlet angle of the second air guide channel 422 is set away from the arc-shaped side wall 306, so that the
  • the setting position of the cooling fan 40 is at the opposite corner of the outer pot shell 102, and the inner cavity 114 between the outer pot shell 102 and the heat preservation inner cover 101 has the largest space at the diagonal, which is convenient for the air suction of the cooling fan 40 and reduces wind resistance , increase the air intake.
  • This embodiment proposes an electric rice cooker that is easy to clean, referring to Fig. 11-Fig.
  • the inner container 3 there is a first gap 5 between the heating plate 2 and the inner wall of the pot, and there is a second gap 6 between the side wall of the inner container and the inner wall of the pot.
  • the first gap 5 communicates with the second gap 6, and the pot body 1
  • the inner wall is provided with a cooling air inlet 13 , the cooling air inlet 13 at least faces the first gap 5 , and the cooling air blown by the cooling fan 4 from the cooling air inlet flows from the first gap 5 to the second gap 6 .
  • the inner pot 3 is used to place food materials, and the heating plate 2 is attached to the inner pot 3 for heat transfer to the inner pot 3.
  • the side wall of the inner pot 3 is generally cooled , but for the rice cooker heated by the heating plate 2, because the heating plate has a high thermal inertia, even if the side wall of the inner container 3 is cooled, the heating plate 2 is still transferring heat to the inner container 3, resulting in poor cooling effect Good, and the ingredients are mainly gathered at the bottom of the liner 3.
  • the present application can cool the heat source of the heating plate 2 through the setting of the ventilation gap to achieve the best cooling effect, and then realize the cooling of the bottom of the inner pot, so as to prevent the rice at the bottom of the inner pot from turning yellow and sticking to the pot.
  • the temperature of the inner pot is lowered due to the cooling fan at the bottom, so that the inner wall of the inner pot will be liquefied to form condensed water.
  • the condensed water is located between the inner wall of the inner pot and the rice to form an isolation layer, thereby preventing the rice from sticking. It is convenient to use a rice spoon to scoop out the rice along the inner wall of the inner pot.
  • the cooling of the heating plate 2 is realized only by arranging the cooling fan 4 to cooperate with the ventilation gap, and the effect of cooling the inner container is achieved.
  • the cooling air blown by the cooling fan 4 through the cooling air inlet 13 first enters the first gap 5, which can directly and effectively cool the heating plate 2, and then enters the second gap 6, which can cool the side wall of the inner container 3, forming a
  • the orderly flow of cooling air achieves the ideal air cooling effect, and the cost is low and the service life of the product is long.
  • the pot body 1 includes an outer shell 11 and a heat preservation cover 12 inside the outer shell, the heating plate 2 and the liner 3 are located in the heat keeping cover 12, and the heating plate 2 heats the There is a first gap 5 between the inner tank 3, the heating plate 2 and the bottom wall of the heat preservation cover 12, the side wall of the inner tank 3 and the side wall of the heat preservation cover 12 has a second gap 6, and the first gap 5 communicates with the second gap 6
  • the inner wall of the pot body 1 is provided with a cooling air inlet 13, the cooling air inlet at least faces the first gap 5, and the cooling air blown by the cooling fan 4 from the cooling air inlet 13 flows from the first gap 5 to the second gap 6, the An air outlet is provided at the bottom of the heat preservation cover 12 , so that a heat dissipation space is formed between the heat preservation cover 12 and the shell 11 .
  • the hot air can be discharged in time through the air outlet, the temperature in the heat preservation cover 12 is reduced, and the cooling air is prevented from
  • the cooling fan 4 is located outside the heat preservation cover 12, the inner wall of the heat preservation cover 12 is provided with a cooling air inlet 13, the height of the cooling air inlet 13 is lower than the heating plate 2, cooling The cooling air blown in by the fan from the cooling air inlet is blown toward the heating disk 2 .
  • the heat preservation cover 12 is generally a metal part, which can reduce the temperature of the heating plate 2 and the inner container 3 from spreading to the outside of the heat preservation cover 12, causing the outer shell temperature of the electric cooker to be too high, and the setting of the heat preservation cover 12 can reduce the loss of heat of the heating plate 2 when heating lost.
  • the cooling fan 4 Since the cooling fan 4 is located outside the heat preservation cover 12, and the heat preservation cover 12 is provided with a heating plate 2, the temperature of the heat generating plate 2 can be prevented from radiating to the cooling fan, thereby improving the service life of the cooling fan. Moreover, the space in the heat preservation cover 12 is limited, and the setting of the cooling fan 4 will not take up the heat preservation cover 12 internal space. Since the cooling fan 4 is located outside the heat preservation cover 12, it will be closer to the outside world, so the external cold wind can be sucked into the heat preservation cover 12 conveniently. Inside.
  • the height of the cooling air inlet 13 is lower than that of the heating disk 2, so that the cooling air from the cooling air inlet 13 can be blown to the heating disk 2 instead of directly blowing to the inner tank 3, so as to achieve the heat source of the heating disk 2 cooling.
  • the housing 11 is provided with an air inlet 14, and the cooling fan 4 is located between the air inlet 14 and the cooling air inlet 13, and the cooling air outside the housing 11 is drawn from the air inlet 14 Inhale and blow out from the cooling air inlet 13.
  • the cooling fan 4 can directly suck in a large amount of external cooling air, and then blow it into the heat preservation cover 12 to cool the heating plate 2 .
  • the air inlet 14 is located on the side wall of the housing 11 , and in other embodiments, the air inlet 14 may also be located on the bottom wall of the housing 11 .
  • part of the heating plate 2 has grooves or protrusions, so that there is a ventilation gap 7 between the inner tank 3 and the heating plate 2 .
  • the key to cooling the inner container 3 is to cut off the heat transfer from the heating plate 2 to the inner container 3.
  • a ventilation gap is formed between the liner 3 and the heating plate 2, and when cooling is required, cooling air is blown into the ventilation gap to effectively reduce the temperature of the inner liner quickly.
  • the ventilation gap 7 includes circumferential gaps 71 and radial gaps 72 arranged alternately. Through the staggered gaps, the cooling air can quickly diffuse and cool.
  • a through hole 21 is provided in the center of the heating plate 2, and an air deflector 24 is provided at the through hole 21, and the air deflector 24 guides at least part of the Cooling air flows into the ventilation gap 7 from the first gap 5 .
  • the cooling air can flow into the ventilation gap 7 from the first gap 5, and when the cooling wind flows in the first gap 5, the bottom of the heating plate 2 can be cooled.
  • the top of the heating plate 2 can be cooled, realizing the effect of cooling the heating plate up and down, and from the first gap 5
  • the cooling wind coming over is also just blown in from the cooling air inlet 13, and the temperature is relatively low, so that after the cooling wind enters the heat preservation cover 12, it can cool down the bottom and top of the heating plate 2 at the first time, so as to reach the optimum temperature. cooling effect.
  • the air guide plate 24 and the ventilation gap 7 the cooling problem of the heat-generating disk attached to the inner tank heating method is solved.
  • a retaining rib 23 is provided at the bottom of the heating plate 2, and the retaining rib 23 forms an air guide channel, and the retaining rib 23 is parallel to There are multiple cooling air inlets 13 corresponding to the air guide channels, and the air guide channels formed can just make the cooling air flow smoothly.
  • part of the cooling air cooperates with the air guide plate 24 and passes through the through hole 21 to reach the heating plate 2 above, spread to other areas of the heating plate 2 through the ventilation gap 7.
  • an air duct 8 is provided between the cooling fan 4 and the cooling air inlet 13 , and the cross-sectional area of the air duct 8 gradually becomes smaller. Under the condition that the cooling fan 4 rotates at the same speed, the flow of the cooling air can be accelerated by reducing the cross-sectional area of the air duct, and the cooling effect of the cooling fan 4 can be improved.
  • the second gap 6 gradually becomes smaller from bottom to top.
  • the inner container is a spherical inner container, and the spherical inner container has a maximum latitude circle, and the cooling fan is lower than the maximum latitude circle.
  • the characteristic of the spherical liner is that it has a maximum latitude circle, that is, there is a widest place in the height direction, and the width gradually decreases from the maximum latitude circle upward or downward.
  • the cooling fan is set below the maximum latitude circle.
  • the horizontal space at the maximum latitude circle is the smallest, and there will be a certain space above or below it, and on the other hand
  • the lower part of the liner needs to be cooled more, so this application arranges the cooling fan below the maximum weft circle, taking into account the space and the cooling effect.
  • the inner tank 3 is a stainless steel inner tank.
  • the inner surface of the inner pot 3 is provided with a non-stick coating.
  • the problem with the non-stick coating is that it is not resistant to scratches. After long-term use, the coating falls off and the inner pot 3 sticks.
  • the pot affects the service life of the inner tank 3.
  • the temperature of the inner container is lowered due to the cooling fan at the bottom, so that the inner wall of the inner container will be liquefied to form condensed water, and the condensed water is located between the inner wall of the inner container and the rice to form an isolation layer.
  • the rice can be avoided from sticking to the pan, and it is convenient to scoop out the rice along the inner wall of the inner container with a rice spoon.
  • the inner container can be set as a stainless steel inner container, and its inner surface does not need to be provided with a non-stick coating, which greatly improves the service life of the inner container 3. If the coating is applied, there is no need to worry about the problem of the coating falling off. You can use a steel wool ball to clean the inner surface of the liner during cleaning.
  • connection terminals 22 of the heating plate 2 extend through the bottom wall of the heat preservation cover 12 to the heat dissipation space.
  • the connecting terminal 22 is located under the heat preservation cover 12, and the temperature is relatively low, which can improve the service life of electrical components, and the airflow discharged from the air outlet can further cool the connecting terminal 22 and the like.
  • the air exhaust port can be formed by the through hole on the bottom wall of the heat preservation cover 12, and there can be multiple air exhaust ports, wherein some of the air exhaust ports are used for connecting terminals 22 and other electrical components to pass through at the same time, and some of the air exhaust ports are used for temperature measurement at the same time. element through.

Abstract

公开了一种易清洗电饭煲，包括煲体(10)、煲盖(20)、用于烹饪米饭的内胆(30)、加热装置(105)、冷却风扇(40)，煲体设有容置腔(106)，内胆(30)置于容置腔(106)内且位于加热装置(105)上，煲盖(20)扣合封闭容置腔(106)与内胆(30)形成烹饪腔(301)，煲体(10)包括设有进风口(108)的保温内罩(101)，冷却风扇(40)设于进风口(108)处，内胆外侧壁与保温内罩(101)内壁之间具有保温间隙(107)，进风口(108)设有朝向内胆下部(302)用以降低冷风进入保温间隙(107)风阻的入风角度，进风口(108)进入的冷风自下而上的环绕内胆(30)循环冷却内胆下部(302)，内胆下部(302)接触米饭的部分冷却降温，米饭内水汽向内胆(30)下部(302)接触米饭部分的内壁凝结形成冷凝水，冷凝水浸润与内胆(30)内壁贴合的米饭。电饭煲具有良好的无涂层不沾效果，方便清洗。

Description

一种易清洗电饭煲
本申请要求下述专利申请的优先权，其全部内容通过引用结合在本申请中：
1)2021年12月6日提交中国专利局、申请号为202111472568.X、发明名称为“一种易清洗电饭煲”的发明专利申请。
2)2021年12月6日提交中国专利局、申请号为202111511407.7、发明名称为“一种方便清洗的电饭煲”的发明专利申请。
3)2021年12月6日提交中国专利局、申请号为202123033724.0、发明名称为“一种易清洗电饭煲”的实用新型专利申请。
4)2021年12月6日提交中国专利局、申请号为202211314733.3、发明名称为“一种易清洗电饭煲”的发明专利申请。
技术领域
本申请属于厨房用具技术领域，具体涉及一种易清洗电饭煲。
背景技术
现有的电饭煲为了实现米饭的不沾效果，会在内胆内表面设置一层不沾涂层，但是这种不沾涂层在用户使用过程中，寿命有限，受高温或者剐蹭易脱落，进而无法长久实现内胆的不沾效果，且脱落的涂层容易混入米饭中被人误食，影响人体健康，涂层脱落后，将露出内胆的基底，使得烹饪过程中基底直接暴露在高温高湿等的烹饪环境中，影响食品卫生安全，因此当涂层脱落时，内胆不适宜继续使用。而内胆使用无涂层制作时(如内胆内表面使用不锈钢)，又容易出现米饭粘锅，盛饭时饭勺不易铲掉内胆表面粘接的米饭问题。
目前有公开一些通过对内胆的冷却来实现不沾的电饭煲，而不用设置涂层，但其防粘效果不好，由于无法对内胆完成均匀的冷却，导致还是有一些地方出现粘锅的情况。
发明内容
本申请提供了一种易清洗电饭煲，以解决电饭煲无涂层不沾效果差的问题。
本申请所采用的技术方案为：
一种易清洗电饭煲，包括煲体、煲盖、用于烹饪米饭的内胆、加热装置、冷却风扇，所述煲体设有容置腔，所述内胆置于容置腔内且位于加热装置上，煲盖扣合封闭容置腔与内胆形成烹饪腔，通过所述冷却风扇冷却所述内胆，内胆下部接触米饭的部分冷却降温形成冷凝水，冷凝水浸润与内胆内壁贴合的米饭；在所述煲盖和煲体的结合处设有第一排风口，煲盖与煲体之间具有结合间隙，该结合间隙形成第一排风口，冷风冷却所述内胆后，经所述第一排风口排出。
由于采用了上述技术方案，本申请所取得的有益效果为：
经所述第一排风口排出,以便于形成先下后上的气流，从而提高内胆的冷却效果，从而实现不粘。
附图说明
此处所说明的附图用来提供对本申请的进一步理解，构成本申请的一部分，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：
图1为本申请一种实施方式下的所述电饭煲的剖视图；
图2为本申请一种实施方式下的所述电饭煲开盖状态图；
图3为本申请一种实施方式下的内胆下部接触米饭部分的局部示意图；
图4为本申请一种实施方式下煲盖与煲体结合处的局部示意图；
图5为本申请一种实施方式下第二排汽口的示意图；
图6为本申请一种实施方式下内胆的示意图；
图7为本申请一种实施方式下具有球形内壁的内胆示意图；
图8为本申请一种实施方式下具有凹槽的内胆示意图；
图9为本申请一种实施方式下保温内罩上的冷却风扇的局部放大示意图；
图10为本申请一种实施方式下冷却风扇的示意图；
图11为本申请实施例二的电饭煲剖视图；
图12为图1中局部放大图；
图13为本申请实施例二的电饭煲立体图；
图14为本申请实施例二的发热盘示意图一；
图15为本申请实施例二的发热盘示意图二；
其中：
10煲体；101保温内罩；102外锅壳；103底座；104锅圈；105加热装置；106容置腔；107保温间隙；108进风口；109吸风口；110第一排风口；111底部间隙；112出风通道；113第二排风口；114内腔体；115支撑件；
20煲盖；
30内胆；301烹饪腔；302内胆下部；303内胆腰部；304内胆上部；305内胆翻边；306弧状侧壁；307平状底壁；308球状内壁；309凹槽；310平底部；
40冷却风扇；41导风片；42导风通道；43导风面；44上导风片；45下导风片；46导风间隙；421第一导风通道；422第二导风通道；
50米饭；
60冷凝水。
图11-15的附图标记:
煲体1，外壳11，保温罩12，冷却进风口13，入风口14，发热盘2，通孔21，接线端子22，挡筋23，导风板24，内胆3，冷却风扇4，第一间隙5，第二间隙6，通风间隙7，风道8。
具体实施方式
为了更清楚的阐释本申请的整体构思，下面结合说明书附图以示例的方式进行详细说明。
在下面的描述中阐述了很多具体细节以便于充分理解本申请，但是，本申请还可以采用其他不同于在此描述的其他方式来实施，因此，本申请的保护范围并不受下面公开的具体实施例的限制。
另外，在本申请的描述中，需要理解的是，术语“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
在本申请中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接，还可以是通信；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。在本说明书的描述中，参考术语“实施方式”、“实施例”、“一种实施例”、“示例”或“具体示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本申请的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。
实施例一
如图1-3所示为一种易清洗电饭煲，包括煲体10、煲盖20、用于烹饪米饭的内胆30、加热装置105、冷却风扇40，所述煲体10设有容置腔106，所述内胆30置于容置腔106内且位于加热装置105上，煲盖20扣合封闭容置腔106与内胆30形成烹饪腔301，所述煲体10包括设有进风口108的保温内罩101，所述冷却风扇40设于进风口108处，所述内胆30外侧壁与保温内罩101内壁之间具有保温间隙107，所述进风口108设有朝向内胆下部302用以降低冷风进入保温间隙107风阻的入风角度，所述进风口108进入的冷风自下而上的环绕内胆30循环冷却内胆下部302，内胆下部302接触米饭50的部分冷却降温，米饭50内水汽向内胆下部302接触米饭50部分的内壁凝结形成冷凝水60，冷凝水60浸润与内胆30内壁贴合的米饭50。
需要说明的，煲盖20与煲体10之间可以铰接设置，也可以分体设置，用户可通过开启煲盖20和闭合煲盖20实现对用于烹饪米饭的内胆30的取放或米饭的取用，内胆30可取放地放置的煲体10的容置腔106中，通过 底部的加热装置105实现加热，本实施例中，加热装置105为电磁线盘，通过电磁线盘通电时产生的交变磁场对内胆30进行加热；设置的保温内罩101内部形成了用于容置内胆30容置腔106，保温内罩101的底部固定着加热装置105，对于加热装置105为电磁线盘而言，保温内罩101底侧具有底部开口，电磁线盘连接连接在底部开口上，使得电磁线盘直接与保温内罩101连接，由保温内罩101和电磁线盘二者结合围合形成容置腔106，此时煲盖20盖合后，容置腔106除了煲盖20与煲体10的结合处、以及底部的测温孔、漏水孔能与外部空间连通外，没有其他地方会与外部连通，所以整个容置腔106相对封闭，而加热装置105若为发热盘，则整个容置腔106相对而言，底部将存在更多的开口，如用于接线端子伸出保温内罩101的避让孔等。
煲体10还包括锅圈104、外锅壳102和底座103，外锅壳102设置在保温内罩101的外侧，为了固定保温内罩101和外锅壳102，锅圈104与底座103连接，外锅壳102设置在锅圈104与底座103之间，保温内罩101设置在锅圈104上，外锅壳102与保温内罩101之间为内腔体114。对于加热装置105为电磁线盘的电饭煲而言，底座103上设有吸风口109，冷却风扇40可以通过底座103上的吸风口109进行吸风。一些实施例中，可以在外锅壳102上对应进风口108的高度位置设置吸风口109。
如图6所述，内胆30包括内胆腰部303、内胆下部302和内胆上部304；内胆腰部303的直径大于内胆下部302，一些实施例中，内胆腰部303的直径也大于内胆上部304，内胆下部302包括弧状侧壁306和平状底壁307，具体胆形下文详细阐述。
传统的内胆未冷却，内胆内外之间将不存在温差，或作为热源的内胆的温度有时胆体温度还大于米饭的温度，不足以在内胆下部302接触米饭的部分内壁凝结形成冷凝水，因此米饭烧糊粘锅，此时若内胆没有不沾涂层，将难以清洗。本实施例中，通过冷却风扇40完成对内胆的冷却，具体如下:
参考图1,冷却风扇40工作，通过进风口108吸入冷风，朝向容置腔106内送风，进风口108的出风方向与煲体10的竖直方向呈一定夹角，使得进 风口108设有朝向内胆下部302用以降低冷风进入保温间隙107风阻的入风角度，呈一定入风角度的冷风进入保温间隙107后，冷风自上而下的环绕内胆循环冷却内胆下部302。当内胆30内有烹饪好的米饭时，米饭中的高温水汽将在内胆下部302接触米饭的部分内壁凝结，冷凝形成的冷凝水浸润与内胆内壁贴合的米饭，此时冷却后内胆30内外温差外低内高，即由外至内，温度逐渐升高，因此，得以在接触米饭的部分内壁持续有冷凝水来浸润米饭，以此避免不沾，方便清洗。
在形成冷凝水时，现有的冷却风扇40的气流难以均匀的作用于内胆下部302，使得接触米饭的各部分内壁都能维持冷凝水的存在，致使不沾效果不佳。
一定的入风角度，能够降低进入保温间隙107的风阻，提高进风量，同时使得冷风先对内胆下部302进行冷却，且冷风自下而上的环绕内胆循环冷却内胆下部302，即冷风先从内胆腰部303吹下直至环绕内胆下部302，在竖直方向上，由于内胆腰部303直径往往较大，越往下内胆直径逐渐收缩，所以，气流向下运动时，越靠近内胆30的底部，表面积俞小，气流向上运动时，越远离内胆30的底部，表面积俞大；且在水平方向上，由于柱面的存在，从内胆30的左侧至中线时，弧度逐渐增大，从中线至右侧时，弧度逐渐减小，气流向左右侧运动时，刚刚从进风口108流出的气流，离内胆30中线一侧越近，表面积逐渐增大，越过中线后，随远离中线一侧俞远，则表面积逐渐缩小，一定的入风角度，使得冷风先下后上环绕内胆下部302，使得气流主要在竖直方向上流动，而不是水平方向上，从竖直方向冷风先下后上的路径上来看，当进风口108吹出的气流向下运动时，由于表面积的逐渐减小而形成汇聚效应，气流向上运动时表面积逐渐增大而形成扩散效应，汇聚效应使得冷气在与内胆30接触时，先接触面积大，后接触面积小，进而使得冷风能够在相对更冷时有大接触面积而吸收更多热量，以便在汇聚后在相对更热时有小接触面积而吸收更低的热量，避免在汇聚处由于冷气过冷而使得其在小接触面积处热量吸收过多，进而导致接触米饭的各部分冷凝水形成不均的问题；当经过汇聚效应过后，冷风已升温，在此基础上，再向上扩散流动时，将不会在小接触面积处吸热较多，造成 冷却不均的问题。
如图4所示，为形成先下后上的气流，在煲盖20和煲体10的结合处设有第一排风口110，煲盖20与煲体10之间具有结合间隙，该结合间隙形成第一排风口110，所述冷风冷却所述内胆30后，经所述第一排风口110排出。通过第一排风口110进行排风，相对而言，意味着容置腔106的底部和侧壁尽量封闭，减少孔洞的开设，避免气流从底部和侧壁留出。优选地，此时加热装置105为上述的电磁线盘，电磁线盘安装在保温内罩101底部开口处。
本实施例中，如图3所示，内胆30放置在煲体10的容置腔106中，保温内罩101下侧设置加热装置105，加热装置105与内胆30之间具有底部间隙111，为了形成该底部间隙111，内胆30具有内胆翻边305，内胆翻边305与所述煲体10的配合处具有出风通道112，所述保温间隙107中的气流经所述出风通道112进入所述第一排风口110。出风通道112设置，使得气流得在内胆翻边305的阻挡下转变气流方向，使得热风能够更为方便的进入第一排风口110并排出。
本实施例的一些变通实施例中，如图5所示，所述冷却风扇40的旁侧设有第二排风口113，所述第二排风口113连通所述保温内罩101与外锅壳102之间的内腔体114，所述煲体10底部设有连通内腔体114的散热孔，所述冷风冷却所述内胆30后，经所述第二排风口113排入所述内腔体114，再经所述散热孔排出。
旁侧指的是靠近所述冷却风扇40设置，距离冷却风扇40的距离不大于10cm，第二排风口113高度位置可以是与冷却风扇40平齐，当然，在一些具体实施方式中，第二排风口113的方位可以位于其他位置。
如图2、4所示，锅圈104上具有支撑件115，支撑件115设在所述配合处，所述内胆30支撑在所述支撑件115上，以形成所述出风通道112。支撑件115的设置可以是多个，在相邻的支撑件115之间形成出风通道112，通过支撑件115来形成出风通道112将方便内胆30挂接在锅圈104上，不仅能形成隔离间隙，也能形成出风通道112，结构简单。
冷凝水形成的过程需要冷却时间，冷却时间不能过长，为了缩短冷却 时间，可以采用的方法是尽可能的降低内胆下部302接触米饭的部分的表面积，从而降低为形成浸润用冷凝水所需的功率。
对形成冷凝水的过程做估算分析，烹饪末期内胆30温度约100-110℃，米饭温度100℃。估算过程认为内胆30降温放热与水蒸气冷凝放热之和等于冷却风扇40吹风带走的热量。
以冷却风扇40输送的冷空气150L/min，内胆降温到95℃为例，ΔT内胆取15℃，冷空气升温ΔT空气取30℃。
内胆降温放出的热量Q内胆＝m内胆c内胆ΔT内胆；
水蒸气冷凝放出的热量Q水层＝m水层△H水；
冷空气每分钟带走的热量为Q空气＝m空气c空气ΔT空气；
形成冷凝水需要的时间为(Q内胆+Q水层)/Q空气；
相关参数及数值表：
Figure PCTCN2022133703-appb-000001
通过上述估算可知，大约4分钟的冷却时间，可以形成冷凝水水层，延长4分钟的时间属于米饭烹饪的可接受范围内，可以加入米饭烹饪中， 输送150L/min流量的风机大约直径50mm左右的小风机就可以实现，所以此方案可应用性较高。
经制作样机测试验证，3-5分钟的冷却风扇40降温能使内胆内表面冷却到约95℃，内胆内壁表面形成水层，使米饭不易粘结在内胆上。
通过上述计算可以发现，内胆的材质、形状、重量影响着水层的面积、内胆比热容、内胆质量，冷空气的温升，因此，可以通过改进内胆的结构等来控制冷却时间。
具体的，一些实施例中，如图7所示，所述内胆下部302的外侧壁具有弧状侧壁306和平状底壁307，弧状侧壁306所述内侧下部的内侧壁对应所述弧形侧壁和平行底壁的部分为球状内壁308；球状内壁308可以使得内胆下部302接触米饭的部分的表面积最小，从而使得冷却时间最小。弧状侧壁306指的是在内胆外侧壁上下方向的剖面为弧状，弧状侧壁306绕轴旋转形成弧面，弧状的弧线可以为曲率不同的弧线，而不是曲率相同的圆弧线，意味着内胆下部302曲面可以为非球面；平状底壁307用于内胆能平放至桌面上，平状底壁307指的是内胆外侧壁为水平设置。通过“外平内曲”，不仅可以不影响内胆的取放体验，也可以由于球状内壁308的设置，将使得同样的米量下，米饭与内胆接触的表面积最小，从而降低水蒸气冷凝所释放的能量，进而缩短冷却时间。
进一步的，一些实施例中，如图7所示，所述球状内壁308与所述平状底壁307之间的壁厚B1，所述球状内壁308与所述弧状侧壁306之间的壁厚为B2，所述B1≤B2。此处B1和B2可以为最小厚度，也可以为平均厚度，一般而言，胆壁厚度在0.5至10mm不等，可依情况设置，当B1≤B2时，使得“外平内曲”的内胆尽可能的轻薄，降低内胆的重量，进而能够降低内胆的蓄热能力，从而便于内胆降温，以快速形成冷凝水。
为了便于加工，多采用冲压成型工艺成型内胆，这样内胆的壁厚将保持一致，内外壁的形状也将保持一致，为此，一些实施例中，如图8所示，所述内胆下部302具有内外壁均水平设置的平底部310，所述平底部310的内壁的表面积小于其外壁的表面积，为了使得内壁的表面积小于其外壁的表面积，可在所述内胆下部302的外侧壁上设有凹槽309或凸起。由于平 底部310的外壁设有凹槽309或凸起，将增大平底部310的外壁的表面积，这样将提高冷空气的温升，从而提高冷空气每分钟带走的热量，进而缩短冷却时间。
一些实施例中，也可以在弧状侧壁306或平状底壁307上设置凹槽309或凸起，进而提高内胆下部302的外侧的表面积，此时将使得“外平内曲”的内胆内外表面积差值进一步增大，形成米饭接触的部分内外表面积“外大内小”的设置，以此加快冷凝水的形成。
为了提高冷却效果，也可以调整冷空气的风量大小来实现，对于冷却风扇40而言，由于风道阻力的存在，假设额定风量为200L/min，实际损耗将使得风量下降至200L/min以下，因此可以减小进风阻力，来提高风量，从而降低冷却时间。
如图9所示，进风口108处设有导风片41和导风通道42，导风片41使得进风口108的进入保温间隙107的冷风具有入风角度，优选地，导风片41进入保温间隙107的入风角度为10-20度之间，该夹角为导风片41于进风口108处切向方向和保温内罩101的竖直方向间的夹角。本实施例中，入风角度为18度，一些变通实施例中，该夹角可以为10、12、15、20度等。当入风角度小于10度时，将使得导风通道42不便于模具成型，加工难度大；如果大于20度，将使得冷风更多的作用在内胆胆壁上，进而增大风阻。
导风片41具有导风面43，导风面43由所述冷却风扇40一侧向保温间隙107一侧呈弧形延伸设置，以使得冷却风扇40吹出的冷风在经过导风片41时，冷风能从水平方向平缓地过渡至预设的入风角度以进入保温间隙107，避免了导风片41的不合理设计所带来的风量损失，又进一步地降低经过导风片41的风阻，从而提高进风量，进而提高冷却效率。
构成导风通道42的上导风片44和下导风片45沿水平方向的投影不重叠，例如，上导风片44的下端部和下导风片45的上端部在保温内罩101的高度方向上具有导风间隙46，导风间隙46的存在一方面将使得导风片41便于成型，同时，也能降低导风通道42的风阻。
如图10所示，所述导风通道42包括冷风向所述内胆30的侧壁进行送 风的第一导风通道421，和冷风向保温间隙107进行送风的第二导风通道422；各导风通道42均位于内胆下部302的弧状侧壁306所在高度位置处，其中第一导风通道421位于内胆下部302的胆径最大处，其入风角度与弧状侧壁306相交，致使第一导风通道421的冷风能够向内胆腰部303位置进行送风，由于腰部位置的侧壁胆径大，所以表面积大，通过部分导风通道向此处送风冷却，便于形成汇聚效应，以保证内胆下部302的冷却均匀性，第二导风通道422的入风角度与弧状侧壁306相离设置，致使第二导风通道422的冷风能够向保温间隙107进行送风，而不是向内胆胆壁送风，如此能够降低风阻，提高冷空气的进风量，进而缩短冷却时间。第一导风通道421和第二导风通道422具有多个，本实施例中，第一导风通道421和第二导风通道422各设有2个。
冷却风扇40的设置位置处在外锅壳102的对角处，外锅壳102与保温内罩101之间的内腔体114在对角处空间最大，便于冷却风扇40的吸风，减小风阻，提高进风量。
实施例二
本实施例提出了一种方便清洗的电饭煲，参照图11-图13，包括煲体1、发热盘2、放置在煲体1内的内胆3和冷却风扇4，所述发热盘2加热所述内胆3，发热盘2与煲体内壁之间具有第一间隙5，内胆侧壁与煲体内壁具有第二间隙6，所述第一间隙5与第二间隙6连通，煲体1内壁设有冷却进风口13，所述冷却进风口13至少朝向第一间隙5，冷却风扇4自冷却进风口吹入的冷却风自第一间隙5流向第二间隙6。
内胆3内用于放置食材，发热盘2贴合内胆3，用于传热给内胆3，为了对内胆3进行冷却，现有技术中，一般都是冷却内胆3的侧壁，但是对于发热盘2加热的电饭煲来说，由于发热盘具有较高的热惯性，即使内胆3的侧壁得到了冷却，但是发热盘2仍然在传热给内胆3，造成冷却效果不佳，而且食材主要是聚集在内胆3的底部。所以本申请通过通风间隙的设置，可以对发热盘2这个热源进行冷却，达到最佳的冷却效果，进而实现对内胆底部的冷却，避免内胆底部米饭发黄粘锅。内胆中米饭在烹饪结束之后，由于底部冷却风扇降温，使得内胆温度降低，使得内胆内壁会液化形成冷 凝水，冷凝水位于内胆内壁和米饭之间形成隔离层，从而可以避免米饭粘锅，方便用饭勺沿着内胆内壁将米饭铲出。现有技术中，虽然也有对发热盘进行冷却的结构，但是一般都是在发热盘下方设置冷却介质，这种成本高且制造工艺复杂。而本申请中仅通过设置冷却风扇4配合通风间隙就实现了对发热盘2的冷却，达到了冷却内胆的效果。冷却风扇4通过冷却进风口13吹入的冷却风首先进入第一间隙5，可以直接对发热盘2进行有效冷却，然后进入第二间隙6，可以对内胆3的侧壁进行冷却，形成了冷却风的有序流动，达到理想的风冷效果，且成本较低，产品使用寿命高。
进一步的，参照图11和图12，所述煲体1包括外壳11和位于外壳内的保温罩12，所述发热盘2和内胆3位于保温罩12内，所述发热盘2加热所述内胆3，发热盘2与保温罩12底壁之间具有第一间隙5，内胆3侧壁与保温罩12侧壁具有第二间隙6，所述第一间隙5与第二间隙6连通，煲体1内壁设有冷却进风口13，所述冷却进风口至少朝向第一间隙5，冷却风扇4自冷却进风口13吹入的冷却风自第一间隙5流向第二间隙6，所述保温罩12底部设有排风口，以使得保温罩12和外壳11之间形成散热空间。通过排风口可以及时将热风排出，将保温罩12内温度降低，避免冷却风在保温罩12内流动但是无法将热风带出，影响降温效果。
在本实施例中，可参照图12，所述冷却风扇4位于保温罩12外，所述保温罩12内壁设有冷却进风口13，冷却进风口13的高度低于所述发热盘2，冷却风扇自冷却进风口吹入的冷却风吹向所述发热盘2。保温罩12一般为金属件，可以减少发热盘2及内胆3的温度扩散到保温罩12外，造成电饭煲外壳温度过高，且保温罩12的设置，可以减少发热盘2在加热时热量的散失。由于冷却风扇4位于保温罩12外，而保温罩12内设置有发热盘2，可以避免发热盘2的温度辐射到冷却风扇上，提高了冷却风扇的使用寿命。而且，保温罩12内的空间有限，冷却风扇4的设置还不会占用保温罩12内部空间，由于冷却风扇4位于保温罩12外，会更加靠近外界，所以可以方便将外界冷风吸入保温罩12内。在本实施例中，冷却进风口13的高度低于发热盘2，使得从冷却进风口13的冷却风可以吹向发热盘2，而不是直接吹向内胆3，实现对发热盘2这个热源的冷却。
在本实施例中，参照图11，所述外壳11设有入风口14，所述冷却风扇4位于所述入风口14和冷却进风口13之间，将外壳11外的冷却风从入风口14吸入，从冷却进风口13吹出。借助外壳11上的入风口14，冷却风扇4可以直接将大量的外界冷却风吸入，然后吹入保温罩12内，对发热盘2进行冷却降温。本实施例中，入风口14位于外壳11的侧壁，在其他实施例中，入风口14也可以位于外壳11的底壁。
在本实施例中，参照图14和图15，所述发热盘2的局部具有凹槽或凸起，以使得所述内胆3和发热盘2之间具有通风间隙7。对于发热盘2加热内胆3的结构来说，冷却内胆3的关键是切断发热盘2对内胆3的传热，本实施例通过在发热盘2局部设置凹槽或凸起，使得内胆3和发热盘2之间形成通风间隙，在需要冷却降温时，通过冷却风吹入通风间隙内，能够有效将内胆温度快速降低。较佳的，所述通风间隙7包括周向间隙71和径向间隙72交错设置。通过交错设置的间隙使冷却风能够快速扩散冷却。
在本实施例中，参照图12、图14和图15，所述发热盘2中心设有通孔21，所述通孔21处设有导风板24，所述导风板24引导至少部分冷却风从所述第一间隙5流入所述通风间隙7。通过发热盘2上通孔21和导风板24的设置，使得冷却风可以从第一间隙5流入通风间隙7，冷却风在第一间隙5流动时，就可以对发热盘2的底部进行冷却，而通过导风板24的引导到通风间隙7内，再扩散到发热盘2其他区域，可以对发热盘2的顶部进行冷却，实现了对发热盘上下冷却的效果，而自第一间隙5过来的冷却风也是刚从冷却进风口13吹入的，温度相对较低，从而使得冷却风在进入保温罩12之后，可以第一时间对发热盘2的底部和顶部进行冷却降温，达到最佳的冷却效果。本实施例中，借助导风板24和通风间隙7，解决了发热盘贴合内胆加热方式的冷却难题。
在本实施例中，为了确保从第一间隙5过来的冷却风能够顺畅的流动，参照图15，在发热盘2的底部设有挡筋23，挡筋23形成导风通道，挡筋23平行设置有多条，冷却进风口13对应导风通道设置，形成的导风通道刚好可以使得冷却风顺畅流动，结合图12，部分冷却风配合导风板24，穿过通孔21到达发热盘2的上方，通过通风间隙7扩散到发热盘2其他区域。
在本实施例中，参照图12，所述冷却风扇4和冷却进风口13之间设有风道8，所述风道8的横截面积逐渐变小。在冷却风扇4转速一致的情况下，通过风道横截面积变小可以加速冷却风的流动，改善冷却风扇4的冷却效果。
在本实施例中，参照图12，所述第二间隙6由下至上逐渐变小。如此设计，可以确保冷却风大部分停留在内胆3下方，而在烹饪时，米饭主要也是停留在内胆3的下方，所以可以对内胆中的米饭区域进行有效冷却。
在本实施例中，所述内胆为球形内胆，所述球形内胆具有最大纬圆处，所述冷却风扇低于所述最大纬圆处。球形内胆的特点就是具有一个最大纬圆处，即在高度方向上有一个最宽的地方，从最大纬圆处往上或者往下，宽度逐渐减小。本实施例中，冷却风扇低于最大纬圆处设置，一方面由于球形内胆的形状，使的最大纬圆处的横向空间最小，而在其上方或者下方相应会具有一定的空间，另一方面，内胆的下方更加需要进行冷却，所以本申请将冷却风扇设置在最大纬圆处的下方，兼顾了空间和冷却效果。
在本实施例中，所述内胆3为不锈钢内胆。现有技术中，为了避免米饭粘锅，内胆3的内表面会设置不沾涂层，而不沾涂层存在的问题就是不耐刮擦，在长期使用之后涂层脱落导致内胆3粘锅，影响了内胆3的使用寿命。本实施例中，内胆中米饭在烹饪结束之后，由于底部冷却风扇降温，使得内胆温度降低，使得内胆内壁会液化形成冷凝水，冷凝水位于内胆内壁和米饭之间形成隔离层，从而可以避免米饭粘锅，方便用饭勺沿着内胆内壁将米饭铲出。由于通过冷却风扇可以避免米饭粘锅，所以本实施例中，内胆可以设置为不锈钢内胆，其内表面不用设置不沾涂层，大大提高了内胆3的使用寿命，由于内表面没有不沾涂层，不用担心涂层脱落的问题，在清洗时可以使用钢丝球清洗内胆内表面。
在本实施例中，所述发热盘2的接线端子22穿过保温罩12的底壁延伸至所述散热空间。接线端子22位于保温罩12的下方，温度相对较低，可以提高电器元件的使用寿命，而且从排风口排出的气流可以进一步对接线端子22等进行冷却降温。排风口可以是由保温罩12底壁上的通孔构成，排风口可以设置有多个，其中部分排风口同时供接线端子22等电器元件穿 过，部分排风口同时供测温元件穿过。
本申请中未述及的地方采用或借鉴已有技术即可实现。
本说明书中的各个实施例均采用递进的方式描述，各个实施例之间相同相似的部分互相参见即可，每个实施例重点说明的都是与其他实施例的不同之处。
以上所述仅为本申请的实施例而已，并不用于限制本申请。对于本领域技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原理之内所作的任何修改、等同替换、改进等，均应包含在本申请的权利要求范围之内。

Claims (10)

  1. 一种易清洗电饭煲，包括煲体、煲盖、用于烹饪米饭的内胆、加热装置、冷却风扇，所述煲体设有容置腔，所述内胆置于容置腔内且位于加热装置上，煲盖扣合封闭容置腔与内胆形成烹饪腔，其特征在于，
    通过所述冷却风扇冷却所述内胆，内胆下部接触米饭的部分冷却降温形成冷凝水，冷凝水浸润与内胆内壁贴合的米饭；
    在所述煲盖和煲体的结合处设有第一排风口，煲盖与煲体之间具有结合间隙，该结合间隙形成第一排风口，冷风冷却所述内胆后，经所述第一排风口排出。
  2. 根据权利要求1所述的易清洗电饭煲，其特征在于，
    所述内胆具有内胆翻边，所述内胆翻边与所述煲体的配合处具有出风通道，所述煲体包括设有保温内罩，所述内胆外侧壁与保温内罩内壁之间具有保温间隙，所述保温间隙中的气流经所述出风通道进入所述第一排风口。
  3. 根据权利要求1所述的易清洗电饭煲，其特征在于，
    所述煲体包括设有保温内罩和第二排风口，所述第二排风口连通所述保温内罩与外锅壳之间的内腔体，所述煲体底部设有连通内腔体的散热孔，所述冷风冷却所述内胆后，经所述第二排风口排入所述内腔体，再经所述散热孔排出。
  4. 根据权利要求3所述的易清洗电饭煲，其特征在于，
    所述第二排风口设置在所述冷却风扇的旁侧，所述旁侧指的是靠近所述冷却风扇设置，距离冷却风扇的距离不大于10cm。
  5. 根据权利要求3所述的易清洗电饭煲，其特征在于，
    第二排风口高度位置与所述冷却风扇平齐。
  6. 根据权利要求2所述的易清洗电饭煲，其特征在于，所述煲体还包括锅圈，所述锅圈上具有支撑件，所述支撑件设在所述配合处，所述内胆支撑在所述支撑件上，以形成所述出风通道。
  7. 根据权利要求6所述的易清洗电饭煲，其特征在于，所述支撑件设置多个，在相邻的支撑件之间形成出风通道。
  8. 根据权利要求1所述的易清洗电饭煲，其特征在于，
    所述内胆下部的外侧壁具有弧状侧壁和平状底壁，所述内胆下部的内侧壁对应所述弧状侧壁和平行底壁的部分为球状内壁。
  9. 根据权利要求1所述的易清洗电饭煲，其特征在于，
    所述内胆下部具有内外壁均设置的平底部，所述平底部的内壁的表面积小于其外壁的表面积。
  10. 根据权利要求8-9任一项所述的易清洗电饭煲，其特征在于，
    所述内胆下部的外侧壁上设有凹槽或凸起。
PCT/CN2022/133703 2021-12-06 2022-11-23 一种易清洗电饭煲 WO2023103775A1 (zh)

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JP2011101760A (ja) * 2009-11-12 2011-05-26 Tiger Vacuum Bottle Co Ltd 電気炊飯器による炊飯方法と電気炊飯器
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