Rotary Mixing Cooker

Abstract

To provide a rotary mixing cooker capable of reducing the possibility of detachment of a lid as much as possible even such as when fluid equal to or near the maximum amount is put in a container and when the rotational speed of a rotary blade is high, and capable of improving the stirring performance of the fluid as much as possible even when the rotational speed of the rotary blade is high.SOLUTION: A rotary mixing cooker 1 according to the present invention includes: a driving source 130; container 200 that has a bottom wall part 234 and a side wall part 210 extending upward from an outer edge of the bottom wall part to store a fluid; a rotary blade 231 that is arranged on an upper side of the bottom wall part and generates a rising vortex flow of the fluid when rotated by the driving source; and a lid body 300 that covers the container from an upper side. The lid body has, on its lower surface, a rib RB for dividing the rising vortex flow.SELECTED DRAWING: Figure 4

Description

Technical Field

[0004] , , ,

[0001] The present invention relates to a rotary cooking mixer such as a mixer or a food processor.

Background Art

[0002] In the past, there has been proposed "an electric cooker including a main body equipped with a rotary drive unit, a container that is detachably attached to the main body in a mounted state, and a cooking rotating body that is equipped inside the container and is transmission-connected to the rotary drive unit in a state where the container is attached to the main body, and provided with a mounting mechanism that allows relative rotation with respect to the main body and prevents relative movement in the vertical and horizontal directions with respect to the main body, and enables the container to be mounted on the main body at an arbitrary rotational phase with respect to the main body" (see, for example, Japanese Patent Application Laid-Open No. 2011-244911).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Incidentally, in the rotary mixing cooker (electric cooker) described above, the rotating blades located on the upper side of the bottom wall of the container rotate, agitating the fluid inside the container and generating an upward vortex of fluid. The food to be cooked in the fluid is then crushed as it comes into contact with the rotating blades while riding on the upward vortex. However, in the rotary mixing cooker described above, if the container is filled to its maximum or near-maximum amount of fluid, or if the rotation speed of the rotating blades is high, there is a risk that the lid may be pushed up by the upward vortex of fluid and come off. Furthermore, in the rotary mixing cooker described above, agitation of the fluid inside the container only generates an upward vortex of fluid, and if the rotation speed of the rotating blades is high, there is a risk that the food to be cooked may move to the upper part of the container and remain there before coming into contact with the rotating blades. Therefore, it was desirable to improve the fluid agitation performance (i.e., the ability to bring the food to be cooked into contact with the rotating blades).

[0005] The object of the present invention is to provide a rotary mixing cooker that can minimize the risk of the lid coming off in the above-mentioned cases and can improve the fluid stirring performance as much as possible. [Means for solving the problem]

[0006] The rotary mixing cooker according to the present invention is Power source and A container for containing a fluid, having a bottom wall and side walls extending upward from the outer edge of the bottom wall, A rotating blade is positioned above the bottom wall portion and, when rotated by the drive source, generates an upward vortex flow of the fluid, The container comprises a lid that covers the container from above, The cover has ribs on its underside for dividing the upward vortex.

[0007] With the above configuration, the rising vortex can be made to collide with the ribs, creating divided vortices within the container. The divided vortices are directed from the top to the bottom of the container, inside the rising vortex, by the ribs. Therefore, this rotary mixing cooker can minimize the force that pushes up the lid due to the rising vortex of the fluid. Consequently, this rotary mixing cooker can minimize the risk of the lid coming off, even when the container is filled to its maximum or near-maximum amount of fluid, or when the rotation speed of the rotating blades is high. Furthermore, even if the food to be cooked in the fluid moves to the top of the container due to the rising vortex, the divided vortices can move the food as far down as possible into the container (i.e., towards the rotating blades). Consequently, this rotary mixing cooker can maximize the fluid stirring performance, even when the rotation speed of the rotating blades is high.

[0008] In this invention, Preferably, the ribs, when viewed from the bottom, extend outward from the central part of the lid and are formed at least two at equal intervals.

[0009] According to the above configuration, the size of each vortex can be made as uniform as possible by the divided vortex flow, and the divided vortex flow can generate a single descending vortex flow towards the bottom of the container inside the rising vortex flow. For this reason, this rotary mixer can further improve the fluid stirring performance even in the above-mentioned cases. In addition, this rotary mixer can make the force acting on the container as uniform as possible, and minimize the generation of vibration and noise.

[0010] In this invention, Preferably, the ribs are inclined such that, when viewed from the bottom, they are positioned on the side of the rotational direction of the rotating blade as they move outward from the center of the lid with respect to the radial direction.

[0011] With the above configuration, when the rising vortex of the fluid collides with the ribs, the fluid flow can be directed towards the central part of the lid. Therefore, in this rotary mixing cooker, the generation of vortices by vortices divided from the rising vortex can be promoted as much as possible.

[0012] In this invention, The lid further has a cylindrical wall portion extending downward from the central portion, A through hole is formed on the inside of the cylindrical wall portion. The inner end of the rib is connected to the cylindrical wall portion, Preferably, the lower end of the cylindrical wall portion is located below the lower end of the rib.

[0013] With the above configuration, when the rising vortex flow of the fluid collides with the ribs, the fluid can flow along the ribs and the cylindrical wall. Therefore, in this rotary mixing cooker, the shape of the vortex caused by the divided vortex flow can be made as stable as possible. In addition, in this rotary mixing cooker, the cylindrical wall can suppress as much as possible the outflow of fluid to the outside of the container through the through-holes. The through-holes also serve to prevent the inside of the container from becoming negatively pressurized and making it difficult to remove the lid.

[0014] In this invention, Preferably, the ribs are spaced apart from the side wall portion.

[0015] With the above configuration, compared to the case where the ribs are connected to the side wall, it is possible to stably generate vortices due to the divided vortex flow while preventing the generation of vibration and noise. [Brief explanation of the drawing]

[0016] [Figure 1] This is a perspective view of a mixer according to an embodiment of the present invention. [Figure 2] This is a vertical view of a mixer according to an embodiment of the present invention, cut across a plane that includes the drive shaft of the housing and extends in the vertical, horizontal, and vertical directions. [Figure 3]Perspective view of the bottom wall member with a blade according to an embodiment of the present invention. [Figure 4] Bottom view of the lid according to an embodiment of the present invention. In this figure, the vortices caused by the rising vortex flow generated in the cup are shown. [Figure 5] Cross-sectional view taken along line A-A of FIG. 4. [Figure 6] Cross-sectional view taken along line B-B of FIG. 4. [Figure 7] Plan perspective view of the mixer according to an embodiment of the present invention. In this figure, the mixer is simplified, and the vortices caused by the divided vortex flow generated in the cup are shown.

Embodiments for Carrying Out the Invention

[0017] As shown in FIGS. 1 and 2, the mixer 1 according to an embodiment of the present invention mainly includes a main body 100, a cup 200, and a lid 300. The main body 100, the cup 200, and the lid 300 are independent assembled parts, and the mixer 1 is completed by assembling these assembled parts.

[0018] Hereinafter, after each of these assembled parts is described in detail, the assembling method of the mixer 1 and the operation of the mixer 1 will be described. It should be noted that in the following description, the side on which the operation button (described later) BT is disposed is defined as the front surface.

[0019] <Assembled Parts of the Mixer> (1) Main Body As shown in FIGS. 1 and 2, the main body 100 mainly includes a housing 110, a motor cover 120, a motor 130, a drive shaft 140, a drive-side coupling 150, a circuit board 160, a cooling fan 170, an operation button BT, and an electric plug cord (not shown), etc. Hereinafter, these components will be described in detail.

[0020] (1-1) Housing As shown in Figures 1 and 2, the housing 110 is mainly composed of a main body member 111, a bottom wall member 112, and legs 113, etc. These components will be described in detail below.

[0021] As shown in Figures 1 and 2, the main body member 111 is mainly formed from side wall portions 111A and top wall portions 111B. As shown in Figures 1 and 2, the side wall portion 111A has a roughly truncated conical shape. As shown in Figures 1 and 2, the top wall portion 111B extends inward from the upper end of the side wall portion 111A. As shown in Figure 2, an opening is formed in the center of the top wall portion 111B, and the bearing portion of the drive-side coupling 150 and the drive shaft 140 are located inside this opening.

[0022] As shown in Figures 1 and 2, the bottom wall member 112 is a bowl-shaped member that covers the side wall portion 111A of the main body member 111 from below.

[0023] As shown in Figures 1 and 2, the legs 113 extend downward from the outer periphery of the lower surface of the bottom wall member 112.

[0024] (1-2) Electric motor cover As shown in Figure 2, the motor cover 120 is mainly formed from side walls 121 and a top wall 122. Inside the motor cover 120 are the motor 130 and a cooling fan 170. As shown in Figure 2, the side walls 121 have a roughly cylindrical shape. As shown in Figure 2, the top wall 122 extends inward from the upper end of the side walls 121. As shown in Figure 2, an opening is formed in the center of the top wall 122, and the drive shaft 140 is located inside this opening.

[0025] (1-3) Electric motor The electric motor 130 is an inner rotor type double-shaft electric motor, and as described above, it is housed inside the electric motor cover 120. When the cup 200 is mounted on the main body 100, the rotational power of the electric motor 130 is transmitted to the driven shaft 232 of the cup 200 via the drive shaft 140, the drive-side coupling 150, and the driven-side coupling 233 of the cup 200.

[0026] (1-4) Drive shaft As shown in Figure 2, the drive shaft 140 extends upward from the upper end of the rotor of the electric motor 130 and downward from the lower end of the rotor of the electric motor 130. As shown in Figure 2, the upper end of the drive shaft 140 is inserted into the inside of the bearing portion of the drive-side coupling 150 and fastened, and the lower end of the drive shaft 140 is joined to the rotation center of the cooling fan 170.

[0027] (1-5) Drive side coupling The drive-side coupling 150 has a bearing portion (see Figure 2), and as described above, the upper end of the drive shaft 140 is inserted through this bearing portion and fastened. When the mixer 1 is assembled, the drive-side coupling 150 plays the role of connecting the drive shaft 140 of the main body 100 and the driven shaft 232 of the cup 200 (see Figure 2).

[0028] (1-6) Circuit board As shown in Figure 2, the circuit board 160 is housed inside the housing 110 and positioned outside the motor cover 120, and is connected to the motor 130 and electrical plug cords via control wires, etc.

[0029] (1-7) Cooling fan As shown in Figure 2, the cooling fan 170 is housed inside the motor cover 120 and positioned below the motor 130. As described above, the lower end of the drive shaft 140 is joined to the rotation center of the cooling fan 170. That is, when the motor 130 is driven, its rotational power is transmitted to the cooling fan 170 via the drive shaft 140, causing the cooling fan 170 to rotate. The cooling fan 170 rotates to exhaust the air inside the housing 110 to the outside.

[0030] (1-8) Operation buttons As shown in Figure 1, the operation button BT is located on the front side of the side wall portion 111A of the main body member 111 of the housing 110. By operating the operation button BT, the user can turn the electric motor 130 on and off, change the rotation speed of the rotating blade 231, and perform other operations.

[0031] (1-9) Electrical plug cord The electrical plug cord mainly consists of an electrical cord (not shown) and a plug (not shown), etc. One end of the electrical cord is connected to the circuit board 160, and the other end is connected to the plug. The plug is pluggable into and out of the socket of an external power supply.

[0032] (2 cups) As shown in Figures 1 and 2, the cup 200 mainly consists of a cup body 210, a cup base 220, a bottom wall member with blades 230, and an annular sealing member 240. These components will be described in detail below.

[0033] (2-1) Cup body The cup body 210 is a cylindrical molded body made of glass or resin, and as shown in Figures 1 and 2, is mainly formed from an upper wall portion 211, a lower wall portion 212, a male thread portion 213, and a handle 214. As shown in Figure 2, the cup body 210 does not have a bottom wall portion. The upper wall portion 211 has a substantially cylindrical shape (see Figure 2). As shown in Figure 2, a spout Mp for pouring the fluid to be contained in the cup 200 is formed at the upper left end of the upper wall portion 211. The lower wall portion 212 has a substantially inverted truncated conical shape and extends downward from the lower end of the upper wall portion 211, as shown in Figure 2. The male thread portion 213 is formed on the outer circumferential surface of the lower wall portion 212, as shown in Figure 2, and can be screwed into the female thread portion 222 of the cup base 220. The handle 214 is formed on the right side of the upper wall portion 211, as shown in Figures 1 and 2.

[0034] (2-2) Cup stand As shown in Figures 1 and 2, the cup base 220 is mainly formed from a side wall portion 221, a female threaded portion 222, and a mounting portion 223. The side wall portion 221 has a substantially cylindrical shape (see Figure 2). The female threaded portion 222 is formed on the inner circumferential surface of the side wall portion 221, as shown in Figure 2, and can be screwed into the male threaded portion 213 of the cup body 210. The mounting portion 223 has a substantially annular shape in plan view and extends inward from the lower part of the side wall portion 221, as shown in Figure 2. As shown in Figure 2, the bottom wall member 230 with a blade is placed on the mounting portion 223.

[0035] (2-3) Bottom wall member with blade As shown in Figures 2 and 3, the bladed bottom wall member 230 mainly consists of a rotating blade 231, a driven shaft 232, a driven-side coupling 233, and a bottom wall member 234. These components will be described in detail below.

[0036] (2-3-1) Rotary blade The rotating blade 231 is a metal blade that is responsible for crushing and mixing the food to be cooked in the fluid, and is positioned above the bottom wall member 234, as shown in Figure 2. As shown in Figure 2, a driven shaft 232 is fastened to the rotation center of the rotating blade 231. In the mixer 1 according to this embodiment, the rotating blade 231 rotates in a clockwise direction in a plan view (counterclockwise direction V1 in a bottom view).

[0037] (2-3-2) Driven shaft As described above, the driven shaft 232 is fastened to the rotation center of the rotating blade 231 and is supported along the vertical direction by the axial support portion 234a of the bottom wall member 234, as shown in Figure 2.

[0038] (2-3-3) Driven coupling As shown in Figure 2, the driven coupling 233 is attached to the lower end of the driven shaft 232 and engages with the drive coupling 150 when the cup 200 is mounted on the main body 100 (see Figure 2, etc.). As described above, when the electric motor 130 is driven with the cup 200 mounted on the main body 100, its rotational power is transmitted to the driven shaft 232 via the drive shaft 140, the drive coupling 150, and the driven coupling 233. As a result, the rotating blade 231 rotates.

[0039] (2-3-4) Bottom wall member As shown in Figures 2 and 3, the bottom wall member 234 is mainly formed from a shaft support portion 234a, an inclined portion 234b, an upper annular wall portion 234c, a cylindrical wall portion 234d, and a lower annular wall portion 234e. As shown in Figures 2 and 3, the shaft support portion 234a has a substantially cylindrical shape and rotatably supports the driven shaft 232 via bearings (not shown) such as sliding bearings and rolling bearings. As shown in Figures 2 and 3, the inclined portion 234b extends outward from the vertical center of the shaft support portion 234a. The inclined portion 234b has a truncated conical shape (in other words, it slopes downward as it extends outward from the shaft support portion 234a). As shown in Figure 3, the upper annular wall portion 234c extends outward from the lower end of the inclined portion 234b. As shown in Figure 3, the cylindrical wall portion 234d extends downward from the outer end of the upper annular wall portion 234c and has a substantially cylindrical shape. As shown in Figures 2 and 3, the lower annular wall portion 234e spreads outward from the lower end of the cylindrical wall portion 234d. As shown in Figure 2, the bottom wall member with blades 230 is placed on the mounting portion 223 of the cup stand 220 such that the lower annular wall portion 234e faces the mounting portion 223 of the cup stand 220.

[0040] (2-4) Annular sealing member The annular sealing member 240 is a substantially annular elastic member made of rubber, elastomer, or the like, and as shown in Figure 2, it is positioned between the lower end of the lower side wall portion 212 of the cup body 210 and the upper surface of the lower annular wall portion 234e of the bottom wall member 234 of the bladed bottom wall member 230, and is responsible for keeping the cup body 210 and the bladed bottom wall member 230 watertight.

[0041] As shown in Figure 2, the cup 200 functions as a container only when (1) the bladed bottom wall member 230 is placed on the mounting portion 223 of the cup stand 220, (2) the annular sealing member 240 is placed on the lower annular wall portion 234e of the bottom wall member 234 of the bladed bottom wall member 230, and (3) the male threaded portion 213 of the cup body 210 is screwed into the female threaded portion 222 of the cup stand 220. Then, as shown in Figures 1 and 2, the mixer 1 is assembled when the cup 200 with the lid 300 attached is set into the main body 100. Note that, as shown in Figure 2, in the completed cup 200, the cup body 210 can be considered to extend upward from the outer edge of the bottom wall member 234 of the bladed bottom wall member 230 via the annular sealing member 240.

[0042] (3) Lid As shown in Figures 1, 2, and 4-6, the lid 300 is mainly formed from a side wall portion 301, a top wall portion 302, a cylindrical wall portion 303, a bottomed cylindrical wall portion 304, and ribs RB. The side wall portion 301 has a substantially cylindrical shape (see Figures 2, 4-6). Also, as shown in Figure 2, when the lid 300 is attached to the cup 200, the side wall portion 301 is located inside the upper side wall portion 211 of the cup body 210 of the cup 200 and faces the upper end of the upper side wall portion 211 of the cup body 210 of the cup 200. As shown in Figures 2, 4-6, the top wall portion 302 extends inward and outward from the upper end of the side wall portion 301. As shown in Figures 1 and 2, an air hole 302a is formed inside the cylindrical wall portion 303 in the central part of the top wall portion 302. This air vent 302a connects the internal space of the cup 200 to the external space of the cup 200 via the air vent 304a of the bottomed cylindrical wall portion 304, which will be described later. In other words, the air vent 302a serves to prevent the inside of the cup 200 from becoming negatively pressurized when the lid 300 is attached to the cup 200, which would make it difficult to remove the lid 300. As shown in Figures 2, 4 to 6, the cylindrical wall portion 303 extends downward from the central part of the top wall portion 302 (more specifically, from the central part of the top wall portion 302 outside the air vent 302a in a bottom view) and has a roughly cylindrical shape. As shown in Figures 5 and 6, the lower end of the cylindrical wall portion 303 is located below the lower end of the rib RB (in other words, the cylindrical wall portion 303 extends downward from the rib RB). As shown in Figures 2, 4, and 5, the bottomed cylindrical wall portion 304 is located inside the cylindrical wall portion 303 and is formed from a substantially cylindrical side wall portion extending downward from the edge of the air hole 302a of the top wall portion 302, and a bottom wall portion extending inward from the lower end of this side wall portion. As shown in Figure 5, an air hole 304a is formed in the side wall portion of the bottomed cylindrical wall portion 304. Similar to the air hole 302a of the top wall portion 302, this air hole 304a serves to prevent the inside of the cup 200 from becoming negatively pressurized when the lid 300 is attached to the cup 200, which would make it difficult to remove the lid 300.As shown in Figures 2, 4 to 6, the ribs RB are formed on the underside of the top wall portion 302. In a bottom view, they extend linearly outward from the central part of the top wall portion 302 (more specifically, the cylindrical wall portion 303) and also extend downward from the top wall portion 302. As shown in Figures 2, 4 to 6, the ribs RB do not extend to the side wall portion 301, and when the lid 300 is attached to the cup 200, they are spaced apart from the upper side wall portion 211 of the cup body 210 of the cup 200. Also, as shown in Figure 4, four ribs RB are formed at equal intervals. Furthermore, as shown in Figure 4, the rib RB is inclined such that, in a bottom view, it is positioned on the side of the rotational direction of the rotating blade 231 of the bottom wall member 230 of the cup 200 as it moves outward from the center with respect to the radial direction of the top wall portion 302 (in other words, in a bottom view, the rib RB is inclined in the opposite direction to the rotational direction of the rotating blade 231 of the bottom wall member 230 of the cup 200 (i.e., clockwise) as it moves outward from the center with respect to the radial direction of the top wall portion 302). Here, the angle θ (see Figure 4) between the line passing through the center of the top wall portion 302 and the rib RB in a bottom view may be 0°, but is preferably in the range of greater than 0° and 45° or less, more preferably in the range of 15° or more and 45° or less, even more preferably in the range of 20° or more and 40° or less, and particularly preferably in the range of 25° or more and 35° or less.

[0043] <Regarding the vortex generated in the cup of the mixer according to the embodiment of the present invention> This section describes the vortex flow generated in the cup 200 of the mixer 1 according to an embodiment of the present invention. First, in the mixer 1 with fluid in the cup 200, when the operation button BT is operated and the power is turned on, the rotating blades 231 of the bladed bottom wall member 230 rotate around the driven shaft 232. At this time, the fluid in the cup 200 is stirred and an upward vortex flow of fluid is generated in the cup 200. Here, it is preferable that the vortex S1 caused by the upward vortex flow, as shown in Figure 4, is contained within a circle with a radius from the driven shaft 232 of the bladed bottom wall member 230 to the outer end of the rib RB of the lid 300 in a bottom view. In the mixer 1 according to an embodiment of the present invention, the rotating blades 231 of the bladed bottom wall member 230 rotate counterclockwise in a bottom view (clockwise in a plan view), so the upward vortex flow flows in a counterclockwise direction V1 in a bottom view (clockwise in a plan view), as shown in Figure 4. Then, when the rising vortex of the fluid reaches the lid 300, it collides with the rib RB of the lid 300. As a result, the fluid flow is directed toward the central part of the top wall portion 302 of the lid 300 (towards the cylindrical wall portion 303 of the lid 300) due to the inclination of the rib RB of the lid 300, and the fluid flows along the rib RB and the cylindrical wall portion 303 of the lid 300 (see Figure 7). In this way, the rising vortex of the fluid is divided, and vortices S2 are generated between each rib RB of the lid 300 by the divided vortices (see Figure 7). The divided vortices flow in a clockwise direction V2 in plan view (see Figure 7) and move from the top to the bottom inside the cup 200. As a result, the divided vortices generate a single downdraft directed toward the bottom inside the cup 200 inside the rising vortex. In the mixer 1 according to an embodiment of the present invention, the food to be cooked in the fluid, which has moved to the upper part of the cup 200 by the rising vortex, moves to the lower part of the cup 200 (i.e., the side of the rotating blades 231 of the bladed bottom wall member 230) by riding on the divided vortex and the descending vortex.

[0044] <Features of the mixer according to the embodiment of the present invention> (1) In the mixer 1 according to an embodiment of the present invention, the rib RB is formed on the lower surface of the top wall portion 302 of the lid 300, and plays the role of dividing the upward vortex of the fluid generated in the cup 200 as the rotating blade 231 of the bladed bottom wall member 230 rotates around the driven shaft 232. Therefore, in this mixer 1, the force that pushes up the lid 300 due to the upward vortex of the fluid can be reduced as much as possible. Accordingly, in this mixer 1, even when the cup 200 is filled with the maximum amount or close to the maximum amount of fluid, or when the rotation speed of the rotating blade 231 of the bladed bottom wall member 230 is high, the risk of the lid 300 coming off can be reduced as much as possible. Furthermore, in this mixer 1, even if the food to be cooked in the fluid moves to the upper part of the cup 200 due to the upward vortex, the divided vortex can move the food to the lower part of the cup 200 as much as possible (i.e., the side of the rotating blade 231 of the bladed bottom wall member 230). Therefore, with this mixer 1, even when the rotation speed of the rotating blades 231 of the bladed bottom wall member 230 is high, the fluid stirring performance can be improved as much as possible.

[0045] (2) In the mixer 1 according to an embodiment of the present invention, the ribs RB of the lid 300 extend outward from the center of the top wall portion 302 of the lid 300 when viewed from the bottom, and are formed in four equal intervals. Therefore, in this mixer 1, the size of each vortex S2 caused by the divided vortex flow can be made as uniform as possible, and the divided vortex flow can generate one descending vortex flow towards the bottom of the cup 200 inside the rising vortex flow. Consequently, in this mixer 1, the fluid stirring performance can be further improved even when the rotation speed of the rotating blades 231 of the bladed bottom wall member 230 is high. In addition, in this mixer 1, the force applied to the container can be made as uniform as possible, and vibration and noise can be minimized.

[0046] (3) In the mixer 1 according to an embodiment of the present invention, the ribs RB of the lid 300 are inclined such that, when viewed from the bottom, they are positioned on the side of the rotational direction of the rotating blades 231 of the bladed bottom wall member 230 as they move outward from the center with respect to the radial direction of the top wall portion 302 of the lid 300. Therefore, in this mixer 1, when an upward vortex flow of fluid collides with the ribs RB of the lid 300, the fluid flow can be directed towards the central part of the lid 300. Thus, in this mixer 1, the generation of vortices S2 by vortices divided from the upward vortex flow can be promoted as much as possible.

[0047] (4) In the mixer 1 according to an embodiment of the present invention, the cylindrical wall portion 303 of the lid 300 extends downward from the center of the top wall portion 302 of the lid 300. Furthermore, inside the cylindrical wall portion 303 of the lid 300, an air hole 302a is formed in the top wall portion 302, and an air hole 304a is formed in the bottomed cylindrical wall portion 304 of the lid 300. Also, the lower end of the cylindrical wall portion 303 of the lid 300 is located below the lower end of the rib RB of the lid 300. Therefore, in this mixer 1, when an upward vortex flow of fluid collides with the rib RB of the lid 300, the fluid can flow along the rib RB and the cylindrical wall portion 303 of the lid 300. Thus, in this mixer 1, the shape of the vortex S2 formed by the divided vortex flow can be stabilized as much as possible. Furthermore, in this mixer 1, the cylindrical wall portion 303 can suppress as much as possible the outflow of fluid to the outside of the cup 200 through the air holes 302a and 304a.

[0048] (5) In the mixer 1 according to an embodiment of the present invention, the ribs RB of the lid 300 are spaced apart from the upper wall portion 211 of the cup body 210 of the cup 200 when the lid 300 is attached to the cup 200. Therefore, in this mixer 1, when the lid 300 is attached to the cup 200, the ribs RB of the lid 300 are connected to the upper wall portion 211 of the cup body 210 of the cup 200, allowing for the stable generation of vortices S2 due to divided vortices, while preventing the generation of vibrations and noise.

[0049] <Variation> (A) In the mixer 1 according to the previous embodiment, four ribs RB were formed on the lid 300 at equal intervals. However, the ribs RB on the lid 300 may be formed at different intervals. Also, it is sufficient to have at least two ribs RB on the lid 300 instead of four.

[0050] (B) In the mixer 1 according to the previous embodiment, the ribs RB of the lid 300 were inclined such that, when viewed from the bottom, they were positioned on the side of the rotational direction of the rotating blades 231 of the bladed bottom wall member 230 as they moved outward from the center with respect to the radial direction of the top wall portion 302 of the lid 300. However, the ribs RB of the lid 300 do not need to be inclined with respect to the radial direction of the top wall portion 302 of the lid 300 when viewed from the bottom (as described above, the angle θ between the line passing through the center of the top wall portion 302 and the ribs RB when viewed from the bottom may be 0°). Furthermore, the ribs RB of the lid 300 may be inclined in a bottom view, with respect to the radial direction of the top wall portion 302 of the lid 300, from the center outward, toward the side of the rotational direction of the rotating blade 231 of the bladed bottom wall member 230 (in other words, in a bottom view, with respect to the radial direction of the top wall portion 302 of the lid 300, from the center outward, toward the side of the rotational direction of the rotating blade 231 of the bladed bottom wall member 230).

[0051] (C) In the mixer 1 according to the previous embodiment, the ribs RB of the lid 300 extended outward from the cylindrical wall portion 303 of the lid 300 when viewed from the bottom (in other words, the inner ends of the ribs RB of the lid 300 were connected to the cylindrical wall portion 303 of the lid 300). However, the inner ends of the ribs RB of the lid 300 do not have to be connected to the cylindrical wall portion 303 of the lid 300.

[0052] (D) In the mixer 1 according to the previous embodiment, the ribs RB of the lid 300 were spaced apart from the upper wall portion 211 of the cup body 210 of the cup 200 when the lid 300 was attached to the cup 200. However, the ribs RB of the lid 300 may be connected to the upper wall portion 211 of the cup body 210 of the cup 200 when the lid 300 is attached to the cup 200.

[0053] (E) In the mixer 1 according to the previous embodiment, the ribs RB of the lid 300 were straight. However, the ribs RB of the lid 300 are not limited to being straight. For example, the ribs RB of the lid 300 may be curved.

[0054] (F) Although not mentioned in the previous embodiment of the mixer 1, the cup body 210 of the cup 200 and the bottom wall member 234 of the bladed bottom wall member 230 of the cup 200 may be integrated. [Explanation of Symbols]

[0055] 1: Mixer (rotary mixing and cooking appliance) 130: Electric motor (power source) 200: Cup (container) 210: Cup body (side wall) 231: Rotary blade 234: Bottom wall member (bottom wall section) 300: Lid RB: Rib

Claims

1. Power source and A container for containing a fluid, having a bottom wall and side walls extending upward from the outer edge of the bottom wall, A rotating blade is positioned above the bottom wall portion and, when rotated by the drive source, generates an upward vortex flow of the fluid, The container comprises a lid that covers the container from above, The cover has ribs on its underside for dividing the rising vortex, The ribs are spaced apart from the side wall portion. Rotary mixing cooker.

2. The aforementioned ribs, when viewed from the bottom, extend outward from the center of the lid and are formed at least two at equal intervals. The rotary mixing cooker according to claim 1.

3. The ribs are arranged in a spiral shape while remaining perpendicular to the lid, and are inclined such that the outer circumference is located on the upper side in the direction of rotation of the rotating blade compared to the central side. The rotary mixing cooker according to claim 2.

4. The lid further has a cylindrical wall portion extending downward from the central portion, A through hole is formed on the inside of the cylindrical wall portion. The inner end of the rib is connected to the cylindrical wall portion, The lower end of the cylindrical wall portion is located below the lower end of the rib. The rotary mixing cooker according to claim 2 or 3.

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