Pot cover assembly, matching structure of pot cover assembly and inner pot and electric rice cooker

Abstract

The application provides a pot cover assembly, a matching structure of the pot cover assembly and an inner pot, and an electric rice cooker. The pot cover assembly comprises a pot cover, a heat preservation cover plate and a driving mechanism. The heat preservation cover plate is arranged on the inner side of the pot cover through the driving mechanism. The heat preservation cover plate is driven by the driving mechanism to make lifting movement, so that the outer wall surface of the heat preservation cover plate makes sealing lifting movement on the inner cavity wall of the inner pot, and the volume of the cooking space surrounded by the heat preservation cover plate and the inner pot is adjusted. If the amount of cooking materials is large, the cooking space is increased. If the amount of cooking materials is small, the cooking space is reduced. The change of the cooking space changes the energy consumption provided by the heating structure, avoids the energy waste caused by the large cooking space for cooking small amount of materials, and reduces the energy consumption required for cooking materials compared with the existing electric rice cooker.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of household appliances, and particularly relates to a pot cover assembly, a cooperation structure of a pot cover assembly and an inner pot, and an electric rice cooker. BACKGROUND

[0002] The existing electric rice cooker generally comprises a pot body, a pot cover assembly movably arranged on the top opening of the pot body, and an inner pot arranged in the inner cavity of the pot body. The pot cover assembly comprises a pot cover and a heat preservation cover plate arranged in the pot cover. When the pot cover assembly is closed on the pot body, a sealed cooking space is formed between the heat preservation cover plate and the inner pot.

[0003] The volume of the inner pot of the electric rice cooker is fixed, that is, the cooking space for cooking one cup of food and multiple cups of food is the same. The temperature required for different amounts of food to be cooked in the cooking space is the same. Therefore, in the large cooking space, no matter how much food is cooked, the heating structure of the electric rice cooker needs to provide the same energy consumption to the cooking space in order to cook the food to the required temperature.

[0004] In fact, the cooking space and energy consumption required for cooking a small amount of food are both small. If a large cooking space is used to cook a small amount of food, more energy consumption will be consumed, resulting in waste of energy. SUMMARY

[0005] Therefore, the technical problem to be solved by the present application is that the existing electric rice cooker consumes more energy when cooking a small amount of food, resulting in waste of energy.

[0006] Therefore, the present application provides a pot cover assembly, which comprises a pot cover, a heat preservation cover plate and a driving mechanism. The heat preservation cover plate is arranged on the inner side of the pot cover through the driving mechanism. The heat preservation cover plate is driven by the driving mechanism to make lifting movement, so that the outer peripheral wall of the heat preservation cover plate is adapted to seal and slide on the inner cavity wall of the inner pot, so as to change the volume of the cooking space surrounded by the heat preservation cover plate and the inner pot.

[0007] Optionally, the pot cover assembly described above, the driving mechanism comprises a first driver arranged on the pot cover, and at least one lifting component fixed on the heat preservation cover plate. The lifting component is driven by the first driver to make lifting movement.

[0008] Optionally, the pot cover assembly described above, the driving mechanism further comprises at least one guide arranged on the inner wall of the pot cover. The guide has a vertically extending guide channel. The lifting component is correspondingly arranged in the guide channel.

[0009] Optionally, the lid assembly, the lifting member is a rack, the first driver comprises a first rotary motor mounted on the lid, and a gear fixed on a rotating shaft of the first rotary motor, the gear is engaged with the rack.

[0010] Optionally, the lid assembly further comprises a bracket having an annular cavity, the bracket is slidably arranged on the inner cavity of the lid;

[0011] The heat preservation cover plate is arranged in the annular cavity of the bracket, a first matching member is arranged on an inner wall of the bracket, and a second matching member is arranged on an outer wall of the heat preservation cover plate; the heat preservation cover plate is driven by the driving mechanism and can be switched between a first state of lifting movement relative to the bracket and a second state of synchronous lifting movement with the bracket;

[0012] In the first state, the second matching member is separated from the first matching member; in the second state, the second matching member acts on the second matching member.

[0013] Optionally, the lid assembly, the first matching member comprises at least one first protrusion arranged on the inner wall of the annular cavity of the bracket;

[0014] The second matching member comprises at least one second protrusion and at least one third protrusion arranged on the outer peripheral wall of the heat preservation cover plate; the first protrusion and the bottom of the bracket are located between the second protrusion and the third protrusion;

[0015] In the first state, the first protrusion is separated from the second protrusion, and the bottom of the bracket is separated from the third protrusion; in the second state, the second protrusion is lapped on the first protrusion, the bracket and the heat preservation cover plate are synchronously lowered, the bottom of the bracket is lapped on the third protrusion, and the bracket and the heat preservation cover plate are synchronously raised.

[0016] Optionally, the lid assembly, along the circumference of the annular cavity, the first protrusion is at least two, the second protrusion is at least two, and the arc length of the arc-shaped area between any two adjacent first protrusions is greater than the arc length of any second protrusion;

[0017] In the second state, the second protrusion is lapped on the first protrusion one by one.

[0018] Optionally, the lid assembly, the third protrusion is annular step.

[0019] Optionally, the lid assembly, the inner cavity of the lid is provided with at least one supporting column; the outer peripheral wall of the bracket is provided with a lug corresponding to the supporting column, and the lug is correspondingly sleeved on the supporting column;

[0020] In the second state, the bracket is movable along with the heat-insulating cover plate, and the lug is driven to slide on the support column, so that the bracket is slidably arranged on the pot cover.

[0021] Optionally, the pot cover assembly further comprises an elastic sealing member arranged on the outer circumferential wall of the heat-insulating cover plate.

[0022] The inner wall surface of the elastic sealing member is fixed on the heat-insulating cover plate, and the outer wall surface thereof is adapted to be clamped between the outer wall surface of the heat-insulating cover plate and the inner cavity wall of the inner pot.

[0023] Optionally, the pot cover assembly, the elastic sealing member comprises a mounting portion connected with the heat-insulating cover plate, and a sealing portion fixed on the bottom of the mounting portion and protruding radially outward relative to the mounting portion; the sealing portion is adapted to be clamped between the heat-insulating cover plate and the inner cavity wall of the inner pot.

[0024] Optionally, the pot cover assembly, the inner wall surface of the mounting portion is provided with at least two clamping claws protruding radially inward, and the side wall of the heat-insulating cover plate is provided with clamping holes corresponding to the clamping claws; the roots of the clamping claws are correspondingly arranged in the clamping holes, and the claw portions of the clamping claws are hooked on the inner wall surface of the heat-insulating cover plate; and / or

[0025] The longitudinal cross-sectional shape of the sealing portion is C-shaped.

[0026] Optionally, the pot cover assembly, the mounting portion is overlapped on the top surface of the third protrusion, and the sealing portion is located outside the outer side wall of the third protrusion.

[0027] In the second state, the bottom of the bracket can abut against the top of the mounting portion.

[0028] Optionally, the pot cover assembly, the top surface of the heat-insulating cover plate is provided with a heating component avoiding the driving mechanism.

[0029] The present application also provides a cooperation structure of a pot cover assembly and an inner pot, comprising

[0030] an inner pot;

[0031] a pot cover assembly, which is any one of the pot cover assemblies described above.

[0032] The present application also provides an electric rice cooker, comprising the cooperation structure of the pot cover assembly and the inner pot described above; a cooker body and a heating structure arranged in the cooker body.

[0033] The technical scheme of the present application has the following advantages:

[0034] 1. The pot cover assembly provided by the present application comprises a pot cover, a heat preservation cover plate and a driving mechanism, the heat preservation cover plate is arranged on the inner side of the pot cover through the driving mechanism, the heat preservation cover plate is driven to make lifting movement by the driving mechanism, the outer peripheral wall of the heat preservation cover plate is adapted to seal sliding on the inner cavity wall of the inner pot to change the volume of the cooking space enclosed between the heat preservation cover plate and the inner pot.

[0035] The pot cover assembly with the above structure can drive the heat preservation cover plate to make lifting movement through the driving mechanism, so that the outer wall surface of the heat preservation cover plate makes sealing lifting movement on the inner cavity wall of the inner pot, and the volume of the cooking space enclosed between the heat preservation cover plate and the inner pot is adjusted. When the amount of cooking food is large, the cooking space is increased, and when the amount of cooking food is small, the cooking space is reduced. The change of the cooking space changes the energy consumption provided by the heating structure, thereby avoiding the waste of energy consumption caused by cooking a small amount of food in a large cooking space, and reducing the energy consumption required for cooking food compared with the existing electric rice cooker.

[0036] 2. The pot cover assembly of the present application, the driving mechanism comprises a first driver arranged on the pot cover and at least one lifting component fixed on the heat preservation cover plate, the lifting component is driven to make lifting movement by the first driver, the outer peripheral wall of the heat preservation cover plate is adapted to seal sliding between the inner cavity wall of the inner pot to change the size of the cooking space.

[0037] 3. The pot cover assembly of the present application further comprises a bracket with an annular cavity, the bracket is slidably arranged on the inner cavity of the pot cover; the heat preservation cover plate is arranged in the annular cavity of the bracket, the inner wall of the bracket is provided with a first matching component, and the outer wall of the heat preservation cover plate is provided with a second matching component; the heat preservation cover plate is driven by the driving mechanism to switch between a first state of making lifting movement relative to the bracket and a second state of driving the bracket to make lifting movement synchronously; in the first state, the second matching component is separated from the first matching component; in the second state, the second matching component acts on the second matching component.

[0038] The pot cover assembly with the above structure can drive the heat preservation cover plate to make lifting movement through the driving mechanism, so that the outer wall surface of the heat preservation cover plate makes sealing lifting movement on the inner cavity wall of the inner pot, and the volume of the cooking space enclosed between the heat preservation cover plate and the inner pot is adjusted. When the amount of cooking food is large, the cooking space is increased, and when the amount of cooking food is small, the cooking space is reduced. The change of the cooking space changes the energy consumption provided by the heating structure, thereby avoiding the waste of energy consumption caused by cooking a small amount of food in a large cooking space, and reducing the energy consumption required for cooking food compared with the existing electric rice cooker.

[0039] 4. The pot lid assembly of the present invention further includes an elastic sealing member disposed around the outer peripheral wall of the heat-insulating lid; the inner wall surface of the elastic sealing member is fixed to the heat-insulating lid, and its outer wall surface is adapted to be clamped between the outer wall surface of the heat-insulating lid and the inner cavity wall of the inner pot, so that when the heat-insulating lid moves up and down, the elastic sealing member achieves a seal between the outer peripheral wall of the heat-insulating lid and the inner cavity wall of the inner pot, thereby ensuring the airtightness of the cooking space.

[0040] 5. The pot lid assembly of the present invention includes an elastic seal comprising a mounting portion connected to the heat-insulating cover plate, and a sealing portion fixed on the bottom of the mounting portion and protruding radially outward relative to the mounting portion; the sealing portion is adapted to be clamped between the heat-insulating cover plate and the inner cavity wall of the inner pot to achieve a sealed connection between the heat-insulating cover plate and the inner pot.

[0041] 6. In the rice cooker lid assembly of the present invention, a heating component is provided on the top surface of the heat-insulating lid plate, which avoids the driving mechanism. The heating component heats the inner pot from top to bottom, and the heating structure inside the rice cooker heats the inner pot from bottom to top. With the cooperation of the heating component and the heating structure, the food in the inner pot is heated in all directions, so that the food is heated more evenly and the heating rate is faster.

[0042] 7. The matching structure of the pot lid assembly and the inner pot provided by the present invention includes the inner pot and the pot lid assembly described above. By using the pot lid assembly described above, the size of the cooking space enclosed between the inner pot and the pot lid assembly is adjustable. The cooking space can be adjusted according to the amount of food to reduce energy consumption.

[0043] 8. The rice cooker provided by the present invention includes the aforementioned fitting structure between the lid assembly and the inner pot, the cook body, and a heating structure disposed on the cook body. Due to the aforementioned fitting structure, the volume of the cooking space is adjustable, allowing food to be heated within a suitable cooking space, thereby reducing energy consumption. Attached Figure Description

[0044] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0045] Figure 1 This is an explosion diagram of the rice cooker provided in Embodiment 3 of the present invention;

[0046] Figure 2 for Figure 1 A longitudinal cross-sectional view of a Chinese electric rice cooker;

[0047] Figure 3 Fig. 1 is a schematic view of a longitudinal section of a rice cooker; Figure 1

[0048] Figure 4 Fig. 2 is a schematic view of a structure of a heat retaining cover plate; Figure 1

[0049] Figure 5 Fig. 3 is a schematic view of a structure of a support; Figure 1

[0050] Figure 6 Fig. 4 is a schematic view of a structure of an elastic sealing member; Figure 1

[0051] Figure 7 Fig. 5 is a schematic view of a longitudinal section of the heat retaining cover plate, the support and the elastic sealing member; Figure 1

[0052] Figure 8 Fig. 6 is a schematic view of the heat retaining cover plate at a highest position; Figure 1

[0053] Figure 9 Fig. 7 is a schematic view of the heat retaining cover plate at a lowest position; Figure 1 BRIEF DESCRIPTION OF THE DRAWINGS

[0054] 1 - Cooker cover

[0055] 2 - Heat retaining cover plate; 21 - Second mating part; 211 - Second protrusion; 212 - Third protrusion; 22 - Clamping hole; 23 - Cover plate body; 24 - Annular flange

[0056] 31 - First rotary motor; 32 - Gear; 33 - Lifting part; 34 - Guide; 341 - Guide channel; 35 - Motor mounting frame

[0057] 4 - Support; 41 - First mating part; 42 - Support column; 43 - Lugs

[0058] 5 - Elastic sealing member; 51 - Mounting part; 511 - Clamping claw; 52 - Sealing part

[0059] 6 - Heating part

[0060] 7 - Inner pot; 8 - Cooker body

[0061] DETAILED DESCRIPTION

[0062] ​​​​​​​The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0063] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0064] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0065] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0066] Example 1

[0067] This embodiment provides a pot lid assembly 1, such as... Figures 1 to 9 As shown, it includes a pot lid 1, a heat-insulating cover plate 2, and a driving mechanism. The heat-insulating cover plate 2 is located inside the pot lid 1 via the driving mechanism. The heat-insulating cover plate 2 is driven by the driving mechanism to move up and down, so that the outer peripheral wall of the heat-insulating cover plate 2 is suitable for sealing and sliding on the inner cavity wall of the inner pot 7, thereby changing the volume of the cooking space enclosed between the heat-insulating cover plate 2 and the inner pot 7.

[0068] The cover 1 assembly of the structure can make the outer wall surface of the heat preservation cover plate 2 make the sealing lifting movement on the inner cavity wall of the inner pot 7, so that the volume of the cooking space surrounded by the heat preservation cover plate 2 and the inner pot 7 is adjusted. If the amount of cooking food is large, the cooking space is increased, if the amount of cooking food is small, the cooking space is reduced, the change of the cooking space changes the energy consumption provided by the heating structure, avoids the waste of energy consumption caused by the large cooking space for cooking a small amount of food, and reduces the energy consumption required for cooking food compared with the existing electric rice cooker.

[0069] For the driving mechanism, as shown in Figure 2 , preferably, the driving mechanism includes a first driver provided on the cover 1, and at least one lifting component 33 fixed on the heat preservation cover plate 2, the lifting component 33 is driven by the first driver to make lifting movement.

[0070] For example, as shown in Figure 2 and Figure 4 , the cover 1 and the heat preservation cover plate 2 form a mounting cavity, the driving mechanism is arranged in the mounting cavity, the first driver includes a first rotary motor 31 and a gear 32, the first rotary motor 31 is fixed on the inner wall of the top of the cover 1, the gear 32 is fixed on the rotating shaft of the first rotary motor 31; the lifting component 33 is a rack, the bottom of the rack is fixed on the top of the heat preservation cover plate 2, the gear 32 is arranged in meshing with the rack. When the first rotary motor 31 rotates, the gear 32 rotates to drive the rack to make lifting movement in the vertical direction, thereby driving the heat preservation cover plate 2 to make lifting movement.

[0071] In order to guide the lifting movement of the rack in the vertical direction, as shown in Figure 2 and Figure 3 , the driving mechanism further includes at least one guide 34 provided on the inner wall of the cover 1, the guide 34 has a vertically extending guide channel 341, and the rack is arranged in the guide channel 341.

[0072] Further preferably, as shown in Figure 3 , the guide 34 is a box body, the bottom of the box body is open and one side wall is open, the inner wall of the cover 1 is provided with a motor mounting frame 35, the motor mounting frame 35 is fixed on one side of the open side of the box body, the motor mounting frame 35 is provided with a first mounting hole, the first rotary motor 31 is inserted into the first mounting hole, the rotating shaft of the first rotary motor 31 extends out of the first mounting hole and is located at the open side, the gear 32 is sleeved on the rotating shaft, and the gear 32 is embedded in the open side of the box body and arranged in meshing with the rack. The structure of the first rotary motor 31, the guide 34 and the gear 32 and the rack is compact, and the space occupied is small; and the gear 32 cooperates with the guide 34 to limit the rack in the guide channel 341 of the guide 34.

[0073] As a variation, the guide 34 can also not have the open mouth described above, in which case the rack needs to have a longer vertical length, the part of the rack outside the bottom of the guide 34 engages the gear 32, and the part of the rack inside the guide channel 341 does not engage the gear 32.

[0074] As a variation of the drive mechanism, the first drive can also be a cylinder, the telescopic shaft of which is connected to the lifting member 33, in which case the lifting member 33 can be a rack or other connecting member of other shapes, and the cylinder makes vertical lifting movement, thereby driving the heat-insulating cover plate 2 to make lifting movement. Alternatively, the lifting member 33 can also not be provided, and the bottom of the telescopic shaft of the cylinder is connected to the top of the heat-insulating cover plate 2. Alternatively, other drive mechanisms that can make lifting movement can also be used.

[0075] As shown in Figure 2 and Figure 5 , the lid assembly further comprises a bracket 4 having an annular cavity, the bracket 4 being slidably arranged in the inner cavity of the lid 1; the heat-insulating cover plate 2 is arranged in the annular cavity of the bracket 4, and the inner wall of the bracket 4 is provided with a first cooperating member 41, as shown in Figure 4 , the outer wall of the heat-insulating cover plate 2 is provided with a second cooperating member 21; the heat-insulating cover plate 2 is driven by the drive mechanism to switch between a first state of making lifting movement relative to the bracket 4 and a second state of synchronously making lifting movement with the bracket 4;

[0076] In the first state, the second cooperating member 21 is separated from the first cooperating member 41; in the second state, the second cooperating member 21 acts on the first cooperating member 41.

[0077] The lid assembly of this structure, by slidably arranging the bracket 4 in the lid 1, driven by the drive mechanism, in the first state, the heat-insulating cover plate 2 moves downward by a first displacement (or upward), and the position of the bracket 4 remains unchanged, when the second cooperating member 21 on the heat-insulating cover plate 2 acts on the first cooperating member 41, the heat-insulating cover plate 2 and the bracket 4 synchronously move downward by a second displacement (or upward), so that the total displacement of the heat-insulating cover plate 2 in the vertical direction is the sum of the first displacement and the second displacement, due to the existence of the first displacement, the thickness of the heat-insulating cover plate 2 can be made thin when the total displacement of the heat-insulating cover plate 2 in the vertical direction, avoiding the phenomenon that the thickness of the heat-insulating cover plate 2 needs to be thickened when the heat-insulating cover plate 2 and the bracket 4 always synchronously move in the vertical direction, thereby the weight and the occupied volume of the lid 1 assembly in the embodiment are small.

[0078] For the first cooperating member 41 and the second cooperating member 21, as shown in Figure 4 and Figure 5 , preferably, the first cooperating member 41 comprises at least one first protrusion arranged on the inner wall of the annular cavity of the bracket 4, for example, as shown in Figure 5In the embodiment, the first protrusions are four, and the four first protrusions are evenly distributed on the annular cavity of the support 4.

[0079] The second matching component 21 comprises at least one second protrusion 211 and at least one third protrusion 212 arranged on the outer peripheral wall of the heat preservation cover plate 2; the first protrusion and the bottom of the support 4 are located between the second protrusion 211 and the third protrusion 212. For example, in the embodiment, the second protrusions 211 are four, and the four second protrusions 211 are evenly distributed on the outer peripheral wall of the heat preservation cover plate 2. As for the third protrusions 212, in the embodiment, the third protrusions 212 are annular steps, and the annular steps and the second protrusions form grooves therebetween. Figure 4 Figure 4

[0080] In the first state, the second protrusions 211 are located above the first protrusions, and the bottom of the support 4 is separated from the third protrusions 212. At this time, if it is required to move the heat preservation cover plate 2 downward to reduce the volume of the cooking space, the driving mechanism drives the heat preservation cover plate 2 to move downward first. For example, in the embodiment, the heat preservation cover plate 2 is first driven to move downward, and when the second protrusions 211 gradually move downward to approach the first protrusions, the third protrusions 212 move away from the bottom of the support 4. In this process, the support 4 does not move, and the heat preservation cover plate 2 is in the first state. Until the second protrusions 211 are one by one overlapped on the first protrusions, if the driving mechanism continues to drive the heat preservation cover plate 2 to move downward, the heat preservation cover plate 2 is switched from the first state to the second state. Under the downward pushing force of the second protrusions 211 on the first protrusions, the heat preservation cover plate 2 and the support 4 move downward synchronously, and the stroke of the downward movement of the heat preservation cover plate 2 is completed. At this time, the third protrusions 212 are separated from the bottom of the support 4, and the second protrusions 211 are overlapped on the first protrusions. Figure 8

[0081] On the contrary, if it is required to move the heat preservation cover plate 2 upward to increase the cooking space, the driving mechanism drives the heat preservation cover plate 2 to move upward, and the heat preservation cover plate 2 is switched from the second state to the first state. At this time, the heat preservation cover plate 2 moves upward, the second protrusions 211 are separated from the first protrusions, and the third protrusions 212 gradually move upward to approach the bottom of the support 4. In this process, the support 4 does not move, and only the heat preservation cover plate 2 moves upward. Until the top of the third protrusions 212 abuts on the bottom of the support 4, the heat preservation cover plate 2 is switched from the first state to the second state. The heat preservation cover plate 2 continues to move upward, the third protrusions 212 of the heat preservation cover plate 2 exert an upward pushing force on the bottom of the support 4, so that the heat preservation cover plate 2 and the support 4 move upward synchronously until the heat preservation cover plate 2 reaches the required height. In this way, the switching between the first state and the second state of the heat preservation cover plate 2 is realized to adjust the size of the cooking space.

[0082] ​​​In order to facilitate the assembly between the heat preservation cover plate 2 and the support 4, the arc length of the arc-shaped area between any two adjacent first protrusions is greater than the arc length of any second protrusion 211. When assembling the heat preservation cover plate 2 and the support 4, the support 4 is sleeved on the upper part of the heat preservation cover plate 2, and the second protrusion 211 of the heat preservation cover plate 2 is correspondingly located in an arc-shaped area. Since the arc length of the second protrusion 211 is smaller than the arc length of the arc-shaped area, the second protrusion 211 is located above the first protrusion through the arc-shaped area. Then, the heat preservation cover plate 2 is rotated, so that the second protrusion 211 is correspondingly located directly above the first protrusion, thereby achieving the assembly between the support 4 and the heat preservation cover plate 2. Conversely, the heat preservation cover plate 2 is rotated, so that the second protrusion 211 is correspondingly located above the arc-shaped area, and then the heat preservation cover plate 2 is pulled downward, thereby achieving the disassembly between the support 4 and the heat preservation cover plate 2.

[0083] As a deformation, the number of the first protrusions can be one, two, three, five, etc., and correspondingly, the number of the second protrusions 211 can also be one, two, three, five, etc. The specific number is selected according to needs. Preferably, the first protrusion corresponds to the second protrusion 211, and the plurality of first protrusions are uniformly distributed on the inner cavity wall of the support 4, and the plurality of second protrusions 211 are uniformly distributed on the outer peripheral wall of the heat preservation cover plate 2. Of course, the plurality of first protrusions and the plurality of second protrusions 211 can be unevenly distributed.

[0084] As a deformation of the third protrusion 212, the third protrusion 212 can not be annular steps, and can be similar to the second protrusion 211. The plurality of third protrusions 212 are distributed on the outer peripheral wall of the heat preservation cover plate 2. The third protrusion 212 can be one, two, three, four, etc. As long as the third protrusion 212 can abut on the bottom of the support 4 and apply an upward pushing force to the bottom of the support 4, the support 4 and the heat preservation cover plate 2 can move upward synchronously in the second state. The specific shape is not limited.

[0085] The support 4 is slidably arranged in the inner cavity of the pot cover 1. As shown in Figure 3 , Figure 5 , Figure 7 The inner cavity of the pot cover 1 is preferably provided with at least one support column 42. The outer peripheral wall of the support 4 is provided with a lug 43 corresponding to the support column 42. The lug 43 is correspondingly sleeved on the support column 42. In the second state, when the support 4 moves with the heat preservation cover plate 2, the lug 43 slides on the support column 42, so that the support 4 is slidably arranged on the pot cover 1.

[0086] For example, the support column 42 is four, the lug 43 is four, the lug 43 is one-to-one corresponding to the support column 42, and the lug 43 is only on the support column 42. When the external force is applied to the lug 43 or the bracket 4, the lug 43 slides on the support column 42, otherwise the lug 43 remains on the support column 42 without sliding. The arrangement of the support column 42 realizes the sliding connection between the bracket 4 and the pot cover 1.

[0087] The outer peripheral wall of the heat preservation cover plate 2 and the inner cavity wall of the inner pot 7 can adopt hard sealing or soft sealing. For example, as shown in Figure 6 and Figure 7 , an elastic sealing element 5 is arranged on the outer peripheral wall of the heat preservation cover plate 2; the inner wall surface of the elastic sealing element 5 is fixed on the heat preservation cover plate 2, and the outer wall surface thereof is suitable to be clamped between the outer wall surface of the heat preservation cover plate 2 and the inner cavity wall of the inner pot 7. During the sliding process of the heat preservation cover plate 2, the elastic sealing element 5 forms a sliding seal between the heat preservation cover plate 2 and the inner cavity wall of the inner pot 7.

[0088] For the elastic sealing element 5, as shown in Figure 6 , Figure 7 and Figure 8 , preferably, the elastic sealing element 5 comprises a mounting portion 51 connected with the heat preservation cover plate 2, and a sealing portion 52 fixed on the bottom of the mounting portion 51 and protruding radially outward relative to the mounting portion 51; the sealing portion 52 is suitable to be clamped between the heat preservation cover plate 2 and the inner cavity wall of the inner pot 7.

[0089] For example, at least two clamping claws 511 protruding radially inward are arranged on the inner wall surface of the mounting portion 51, and clamping holes 22 through which the clamping claws 511 pass one by one are arranged on the side wall of the heat preservation cover plate 2; the roots of the clamping claws 511 pass in the clamping holes 22 one by one, and the claw portions of the clamping claws 511 are hooked on the inner wall surface of the heat preservation cover plate 2, so as to realize the fixed connection between the elastic sealing element 5 and the heat preservation cover plate 2.

[0090] Preferably, the clamping claws 511 are four, and the clamping holes 22 are four; or the clamping claws 511 are one, two, three, five, six, etc., and the clamping holes 22 are one, two, three, five, six, etc. The specific number of clamping claws 511 and clamping holes 22 is selected according to the needs, and is not limited.

[0091] As a variation of the fixing mode between the mounting portion 51 and the heat preservation cover plate 2, other structures can also be used to fixedly connect the mounting portion 51 and the heat preservation cover plate 2. For example, the elastic sealing element 5 is fixed on the heat preservation cover plate 2 by a fastener.

[0092] For the sealing portion 52, as shown in Figure 7 , the longitudinal cross-sectional shape of the sealing portion 52 is C-shaped, as shown in Figure 8As shown, when the heat-insulating cover 2 is at the top opening of the inner pot 7, due to the radial outward protrusion of the outer peripheral wall of the C-shape, its outer arc surface can tightly fit against the top opening of the inner pot 7, thereby sealing the top opening of the inner pot and forming a cooking space; when the heat-insulating cover 2 moves downward, the outer arc surface of the C-shape is further squeezed and deformed, and the sealing performance of the outer arc surface against the inner cavity wall of the inner pot 7 is further strengthened.

[0093] As a variation, the longitudinal cross-sectional shape of the sealing part 52 can also be other shapes, such as S-shaped or other shapes. The material of the elastic seal 5 is generally preferably food-grade rubber.

[0094] More preferably, such as Figure 7 As shown, the mounting part 51 overlaps the top surface of the third protrusion 212, and the sealing part is located outside the outer wall of the third protrusion 212. In the second state, the bottom of the bracket 4 can abut against the top of the mounting part 51, further making the structural arrangement of the elastic seal 5, the insulation cover 2, and the bracket 4 more compact. In the second state, when the bottom of the bracket 4 abuts against the top surface of the mounting part 51, the bottom of the bracket 4, in cooperation with the third protrusion 212, plays a limiting role in the installation of the mounting part 51.

[0095] like Figure 5 As shown, a heating element 6 is provided on the top surface of the heat-insulating cover 2, avoiding the driving mechanism. For example, the heating element 6 is a heating wire, which is coiled around the outer periphery of the aforementioned rack. The heating wire is connected to a power source, which can be a battery located inside the lid 1 or an external power source. Generally, the heating structure of a rice cooker is located inside the cook body 8 and below the inner pot 7. In this embodiment, through the cooperation of the heating structure on the cook body 8 and the heating wire on the heat-insulating cover 2, the heating structure heats the inner pot 7 from bottom to top, and the heating wire heats the inner pot 7 from top to bottom, achieving all-round heating of the food in the inner pot 7, making the food heated more evenly and faster. As a variation, the heating element 6 can also be other structures, for example, the heating element 6 is a heating tube.

[0096] For insulation cover 2, such as Figure 4 As shown, preferably, the heat-insulating cover plate 2 includes a cover plate body 23, an annular flange 24 formed on the outer peripheral edge of the cover plate body 23, and the annular flange 24 and the cover plate body 23 form a recessed cavity; the heating wire and the toothed rack mentioned above are provided on the top surface of the cover plate body 23; the second protrusion 211, the third protrusion 212, and the elastic sealing member 5 are all provided on the annular flange 24.

[0097] Example 2

[0098] The embodiment provides a cooperation structure of a pot cover assembly and an inner pot 7, which comprises the inner pot 7 and the pot cover 1 assembly, wherein the pot cover 1 assembly is the pot cover 1 assembly in any one of the above-mentioned embodiment 1.

[0099] The cooperation structure of the pot cover assembly and the inner pot 7 in the embodiment can adjust the size of the cooking space formed between the inner pot 7 and the pot cover assembly, so that the cooking space can be adjusted according to the amount of food, thereby reducing energy consumption.

[0100] Preferably, the cooperation structure further comprises a detector for detecting the height of the inner food in the inner pot 7, and a controller electrically connected with the detector and the first driver of the driving mechanism. For example, when rice is cooked, rice and water are added into the inner pot, and at this time, the detector detects the total height of the rice and water. The detector can be a detector based on laser or infrared light reflection principle, or a detector based on a floating ball principle, or other displacement detectors, as long as the detector can detect the total height of the food and water in the inner pot.

[0101] The controller controls the movement stroke of the first driver of the driving mechanism according to the signal detected by the detector, so that the heat preservation cover plate 2 is lowered or raised to adjust the size of the cooking space, so that the food is heated in a suitable cooking space, thereby reducing energy consumption.

[0102] Embodiment 3

[0103] The embodiment provides an electric rice cooker, which comprises the cooperation structure of the pot cover 1 assembly and the inner pot 7 in the above-mentioned embodiment 2, a pot body 8, and a heating structure arranged on the pot body 8.

[0104] The electric rice cooker in the embodiment can adjust the volume of the cooking space, so that the food is heated in a suitable cooking space, thereby reducing energy consumption.

[0105] Obviously, the above-mentioned embodiments are only examples for clearly illustrating the embodiments, and are not intended to limit the embodiments. Based on the above-mentioned description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments cannot be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A lid assembly for a pressure cooker, the lid assembly comprising: The pot cover assembly comprises a pot cover (1), a heat preservation cover plate (2) and a driving mechanism. The heat preservation cover plate (2) is arranged on the inner side of the pot cover (1) by the driving mechanism. The heat preservation cover plate (2) is driven by the driving mechanism to make lifting movement, so that the outer peripheral wall of the heat preservation cover plate (2) is adapted to seal sliding on the inner cavity wall of the inner pot (7) to change the volume of the cooking space enclosed between the heat preservation cover plate (2) and the inner pot (7), The pot cover assembly further comprises a bracket (4) with an annular cavity, which is slidably arranged on the inner cavity of the pot cover (1); The heat preservation cover plate (2) is arranged in the annular cavity of the bracket (4). The inner wall of the bracket (4) is provided with a first matching component (41), and the outer wall of the heat preservation cover plate (2) is provided with a second matching component (21). The heat preservation cover plate (2) is driven by the driving mechanism to switch between a first state of lifting movement relative to the bracket (4) and a second state of synchronous lifting movement with the bracket (4). In the first state, the second matching component (21) is separated from the first matching component (41). In the second state, the second matching component (21) acts on the first matching component (41).

2. The lid assembly of claim 1, wherein The driving mechanism comprises a first driver arranged on the pot cover (1) and at least one lifting component (33) fixed on the heat preservation cover plate (2). The lifting component (33) is driven by the first driver to make lifting movement.

3. The lid assembly of claim 2, wherein The driving mechanism further comprises at least one guide (34) arranged on the inner wall of the pot cover (1). The guide (34) has a vertically extending guide channel (341). The lifting component (33) is correspondingly arranged in the guide channel (341).

4. The lid assembly of claim 2 or 3, wherein the lid assembly further comprises a gasket disposed between the lid and the base. The lifting component (33) is a rack. The first driver comprises a first rotary motor (31) mounted on the pot cover (1) and a gear (32) fixed on the rotating shaft of the first rotary motor (31). The gear (32) is engaged with the rack.

5. The lid assembly of claim 1, wherein The first matching component comprises at least one first protrusion arranged on the inner wall of the annular cavity of the bracket (4). The second matching component (21) comprises at least one second protrusion (211) and at least one third protrusion (212) arranged on the outer peripheral wall of the heat preservation cover plate (2). The first protrusion and the bottom of the bracket (4) are located between the second protrusion (211) and the third protrusion (212). In the first state, the first protrusion is separated from the second protrusion (211), and the bottom of the bracket (4) is separated from the third protrusion (212). In the second state, the second protrusion (211) is overlapped on the first protrusion, the bracket (4) and the heat preservation cover plate (2) are synchronously lowered, the bottom of the bracket (4) is overlapped on the third protrusion (212), and the bracket (4) and the heat preservation cover plate (2) are synchronously raised.

6. The lid assembly of claim 5, wherein The first protrusions are at least two and the second protrusions (211) are at least two along the circumference of the annular cavity, and the arc length of the arc-shaped area between any two adjacent first protrusions is greater than the arc length of any second protrusion (211); In the second state, the second protrusions (211) are one-to-one correspondingly overlapped on the first protrusions.

7. The lid assembly of claim 5, wherein the lid assembly further comprises a gasket disposed between the lid and the bowl. The third protrusions (212) are annular steps.

8. The lid assembly of claim 1, wherein At least one support column (42) is arranged on the inner cavity of the pot cover (1); an outer circumferential wall of the support frame (4) is provided with a lug (43) corresponding to the support column (42), and the lug (43) is one-to-one correspondingly sleeved on the support column (42); In the second state, when the support frame (4) moves with the heat preservation cover plate (2), the lug (43) slides on the support column (42), so that the support frame (4) is slidably arranged on the pot cover (1).

9. The lid assembly of claim 5, wherein, An elastic sealing element (5) is arranged on the outer circumferential wall of the heat preservation cover plate (2); The inner wall surface of the elastic sealing element (5) is fixed on the heat preservation cover plate (2), and the outer wall surface is adapted to be clamped between the outer wall surface of the heat preservation cover plate (2) and the inner cavity wall of the inner pot (7).

10. The lid assembly of claim 9, wherein the lid assembly further comprises a gasket disposed between the lid and the bowl. The elastic sealing element (5) comprises a mounting portion (51) connected with the heat preservation cover plate (2), and a sealing portion (52) fixed on the bottom of the mounting portion (51) and protruding radially outward relative to the mounting portion (51); the sealing portion (52) is adapted to be clamped between the heat preservation cover plate (2) and the inner cavity wall of the inner pot (7).

11. The lid assembly of claim 10, wherein At least two clamping claws (511) protruding radially inward are arranged on the inner wall surface of the mounting portion (51), and a clamping hole (22) corresponding to the clamping claw (511) is arranged on the side wall of the heat preservation cover plate (2); the root of the clamping claw (511) is one-to-one correspondingly arranged in the clamping hole (22), and the claw portion of the clamping claw is hooked on the inner wall surface of the heat preservation cover plate (2); and / or The longitudinal section shape of the sealing portion (52) is C-shaped.

12. The lid assembly of claim 11, wherein The mounting portion (51) is overlapped on the top surface of the third protrusion (212), and the sealing portion is located outside the outer side wall of the third protrusion (212); In the second state, the bottom of the support frame (4) can abut against the top of the mounting portion (51).

13. The lid assembly of any one of claims 1-3, wherein, A heating component (6) is arranged on the top surface of the heat preservation cover plate (2) to avoid the driving mechanism.

14. A structure for fitting a pot cover assembly to an inner pot, characterized by It comprises An inner pot (7); A pot cover assembly as claimed in any one of claims 1-13.

15. An electric rice cooker, characterized by comprising: A cooperation structure of the pot cover assembly as claimed in claim 14 and the inner pot (7); A pot body (8) and a heating structure arranged in the pot body (8).

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