WO2021152886A1 - Rice cooker - Google Patents

Abstract

This rice cooker comprises an inner pot 32 stored in a body 31, a heating coil 34 that is positioned on the outer side of the inner pot 32 and that heats the inner pot 32 by induction, a heating control part 35b that supplies electric power to the heating coil 34, a lid 53 able to open and close relative to the inner pot 32, and a display part 35a that displays information relating to rice cooking. A panel 54 having a transparent window 54a is positioned on the lid 53 as part of the lid 53, and a lid recess 53c is provided underneath the panel 54. A control storage compartment 53d, which stores the display part 35a so that the display of the display part 35a can be seen through the transparent window 54a, is configured in a space formed by the panel 54 and the lid recess 53c. The control storage compartment 53d is provided with a control part intake/exhaust duct 53a that leads to the exterior of the lid 53.

Description

rice cooker

The present invention relates to a rice cooker, and more particularly to a rice cooker having a transparent window portion on a lid panel for seeing through the display.

The rice cooker heats the inner pot containing the food to be cooked by the heating unit. A display unit is provided to display operation information operated by the operator, information related to rice cooking, and the like, and generally, this display unit can be visually recognized through a transparent window unit. Due to the temperature rise during cooking, a temperature difference is generated inside and outside the transparent window portion, and there is a problem that dew condensation occurs on the transparent window portion.

In order to prevent the dew condensation, as shown in Patent Document 1, a hygroscopic material is incorporated from the outside of the outer lid into the concave portion arranged in the outer lid, and the concave portion is externally provided so as to make the inside of the concave portion a closed space. It is known that the moisture absorbing material absorbs the moisture in the sealing space by attaching the panel covering the sealing space last.

Further, as shown in Patent Document 2, by providing a second transparent window that forms an independent air layer on the sealing space side of the transparent window portion, air formed by the second transparent window outside the transparent window portion is provided. Those that reduce the temperature difference between the layers and the inside of the transparent window to prevent dew condensation are known. In addition, there is also a case in which a third transparent window is provided and an air layer is added to further prevent dew condensation.

Japanese Unexamined Patent Publication No. 2000-201812 Japanese Unexamined Patent Publication No. 2016-168197

In the conventional technique shown in Patent Document 1 above, a moisture absorbing material is required while the inner surface side of the display portion is used as a sealing space. Therefore, a space for storing the moisture absorbing material is required, and the rice cooker itself becomes large. , There is a problem that dew condensation occurs when the capacity of the hygroscopic agent is exceeded.

Further, the conventional technique shown in Patent Document 2 has a problem that the transmittance is reduced and the visibility of the display unit is lowered when the second and third transparent windows are added.

The present invention has been made to solve the above-mentioned problems, and the inner pot housed in the main body, a heating coil arranged outside the inner pot and inducingly heating the inner pot, and the heating coil A panel having a heating control unit for supplying power, a lid that can be opened and closed with respect to the inner pot, and a display unit for displaying information related to rice cooking, and a transparent window portion as a part of the lid is arranged. , A recess is provided under the panel, and a storage chamber for accommodating the display is configured in a space formed by the panel and the recess so that the display of the display can be seen through the transparent window. It has an air passage connecting the storage chamber and the outside of the lid.

Therefore, according to the present invention, the transparent window portion does not condense and the visibility of the display portion can be improved.

It is the whole cross-sectional view of the rice cooker in one Example. It is a front view of the rice cooker. It is a perspective view of the rice cooker seen from diagonally below. FIG. 3 is a cross-sectional view taken along the line AA of FIG. FIG. 3 is a cross-sectional view taken along the line BB of FIG. It is the whole front sectional view of the rice cooker. It is a horizontal partial cross-sectional view of the rice cooker. It is a perspective view of the rice cooker seen from diagonally behind. It is the figure which took the panel of FIG. It is sectional drawing of the control part intake / exhaust duct of the rice cooker.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

In FIG. 1, an inner pot 32 having an open upper surface is detachably inserted into the inner container 41 inside the main body 31 of the rice cooker.

A lid 53 having an inner lid 58 on the lower surface is attached to the upper surface of the main body 31 so as to be openable and closable. The top opening of the is closed.

A heating coil 34 for inducing heating the inner pot 32 is provided on the outer bottom surface of the inner pot 32 at the lower part of the main body 31.

Further, a temperature sensor unit 47 is provided at the lower part of the main body 31 which comes into contact with the central portion of the outer bottom surface of the inner pot 32 and detects the temperature of the inner pot 32, and inputs the temperature information to the control unit 35. The heating of the heating coil 34 is controlled via the heating control unit 35b.

The control unit 35 is arranged in a low temperature space in the main body 31.

A cooling fan 36 is provided in the lower front part of the main body 31 to cool the inside of the main body 31 including the heating control unit 35b and the heating coil 34.

The temperature sensor unit 47 includes an upper lid 38a above the cylinder 38, fixes the temperature sensor 37 so as to abut the upper lid 38a, and has an opening 38b below the cylinder 38.

A tubular body holding portion 41a that supports the outer circumference (cylinder body 38) of the temperature sensor unit 47 is provided at the center of the bottom surface of the inner container 41 that houses the inner pot 32. The lower end of the tubular body holding portion 41a is located lower than the heating coil 34.

With the temperature sensor unit 47 incorporated in the tubular body holding portion 41a, a water passage port is formed by the outer circumference of the temperature sensor unit 47 and the tubular body holding portion 41a. This water passage port is for allowing water droplets adhering to the outer bottom surface of the inner pot 32 to flow out to the bottom case 39 of the main body 31 so that even if they drip on the bottom of the inner container 41, they do not collect in the inner container 41. Is.

The bottom case 39 is provided with an exhaust port 39g on the front side, an intake port 39f on the rear side, and a circular convex portion 39d in the middle.

Inside the bottom case 39, a disk-shaped aluminum van 43 with a hole in the center is fixed to the boss with screws. The aluminum van 43 is provided in the lower part of the main body 31 to prevent magnetic flux leakage by the heating coil 34.

In the substantially central portion of the bottom case 39, a cylinder located on the outer peripheral side of the tubular body holding portion 41a that supports the outer periphery (cylinder body 38) of the temperature sensor unit 47 provided in the central portion of the bottom surface of the inner container 41 and has an upper opening. A shaped rib 39a is provided. The tubular rib 39a is higher than the circular convex portion 39d and constitutes the upper end portion at a substantially uniform height.

A drainage hole is provided inside the tubular rib 39a surrounded by reinforcing ribs. The drainage hole is a main body in which water droplets adhering to the outer bottom surface portion of the inner pot 32 hang down on the bottom surface portion of the inner container 41 and dripping from a water passage port formed by the outer circumference of the cylinder body 38 and the cylinder body holding portion 41a. It is for flowing out of 31.

As shown in FIG. 2, there are chamfered shapes 39e at the lower left and right sides of the bottom case 39, and even when the left and right sides of the main body are close to the wall, the distance between the wall and the installation surface is large, so that the wind can be blown. A space that flows without resistance is secured.

FIG. 3 is a perspective view of the rice cooker viewed from diagonally below. The cooling air that has entered along the chamfered shape 39e passes through the handles 39h (handle portions) provided at the left and right center portions of the bottom surface of the bottom case 39, and enters the inside of the main body 31 from the air guide portion 39j through the intake port 39f.

FIGS. 4 and 5 are cross-sectional views of the wind guide portion 39j. FIG. 4 is a cross-sectional view taken along the line AA of FIG. FIG. 5 is a cross-sectional view taken along the line BB of FIG. Loss when cooling air is taken in by making the air intake port 39f higher than the other surfaces of the bottom case 39 along the circular convex portion 39d at the rear of the main body than the circular convex portion 39d where the gap with the installation surface becomes smaller. Is suppressed.

As shown in FIG. 6, the handle 39h provided at a position facing the left and right of the bottom case 39 is tilted by about 10 ° in a direction toward the inside of the main body to move the rice cooker by holding the handle 39h with both hands. The finger grip when doing is improved. Further, the handle 39h may be inclined at an angle in the range of 5 ° to 20 °.

The height of this handle 39h from the surface on which the main body is placed is set to the height at which a normal adult finger can be inserted. That is, the height of the handle 39h from the surface on which the main body is placed is larger than 15 mm, and is preferably selectable in the range of 15 to 35 mm.

Also, the length of this handle 39h is set to a width that allows three fingers from the index finger to the ring finger of a normal adult. That is, the length of the handle 39h is larger than 60 mm, and preferably can be selected in the range of 60 to 200 mm.

Further, by setting the width of the chamfered shape 39e (chamfered shape portion) that enters between the handle 39h and the side surface 39m of the bottom case 39 to about 10 to 20 mm, it fits between the first joint and the second joint of the finger. By naturally holding the side surface 39 m of the bottom case 39 from the second joint with the palm, it can be moved stably.

In addition, by putting a grain on the part of the bottom case 39 that the user touches when carrying the rice cooker, such as the handle 39h, chamfered shape 39e, and side surface 39m, the finger grip during holding is improved, and there is a risk of slipping and dropping. Can be reduced. In addition to the grain, the same effect can be obtained by roughening the surface of the portion or adding a hairline.

If the handle 39h and the chamfer shape 39e are each the length of one joint of the finger, the side surface can be easily held by the palm, and the rice cooker can be held stably.

As shown in the horizontal partial cross-sectional view of the rice cooker in FIG. 7, the handle 39h of the bottom case 39 is provided so that the center line 31a of the main body is substantially in the center, and at the same time, the center line 32a of the inner pot is also a handle. It passes through 39h. The rice cooker has a center of gravity near the center line 31a of the main body when the inner pot 32 does not contain food, and the center of gravity moves to the center line 32a of the inner pot as the weight of the food becomes heavier.

Therefore, since the center line 31a of the main body and the center line 32a of the inner pot pass through the handle 39h at the same time, the handle 39h is stably held when moving with the rice cooker regardless of the amount of food in the inner pot 32. can do.

By securing the above intake path and making the handle 39h of the bottom case 39 easy to hold, it is not necessary to increase the gap with the wall by the handle 48, and it can be abolished, so that the width and depth of the main body can be reduced. It is possible to make it smaller, which makes it possible to make a rice cooker that saves more space.

Further, the exhaust port 39g is set at the center of the bottom surface of the bottom case 39, and the circular convex portion 39d is provided between the exhaust port 39g and the intake port 39f, so that the exhausted warm air enters the intake port again and a short circuit does not occur. There is. Further, when the warm air that has passed through the steam recovery unit 50 is discharged from the steam discharge port 50a, the atmospheric temperature of the upper surface of the main body rises, so that the warm air is prevented from entering the intake port 39f from the upper surface to the back surface. Is provided with a rear wall 39k larger than the width of the intake port 39f.

As a result, even if rice is cooked with the left and right rear sides surrounded by walls, the air intake is stably filled with cooling air equivalent to room temperature, and the heating control unit can be cooled efficiently.

As described above, even when the left and right rear of the rice cooker are surrounded by walls, the cooling air enters from between the chamfered shape provided below the bottom case of the main body and the wall, and the handle of the bottom case and the handle. It enters the intake port through the air guide that connects the part and the intake port.

The cooling air that has entered the intake port cools the heating control unit and the IH coil, and is discharged from the exhaust port provided in front of the bottom case.

The front of the rice cooker is often open, and there is a large round convex part in the center of the bottom case, so the warm air exhaust is not taken in again.

A lid heater 42 composed of a cord heater of about 50 W or the like is provided on the upper surface of the inner lid 58 arranged on the lower surface of the lid 53, and functions to evaporate the dew on the inner lid 58.

The inner lid 58 is provided with a pressure adjusting valve 59 and the lid 53 is provided with a pressure adjusting valve control unit 51. It is a structure to maintain.

The pressure regulating valve control unit 51 moves the sphere by a solenoid to control whether the pressure regulating valve 59 is in the pressure regulating operation state or the open state.

The lid 53 is provided with a steam recovery unit 50 that has a labyrinth structure and converts steam into condensed water. The steam emitted from the pressure regulating valve 59 flows into the steam recovery unit 50, and the condensed water is returned to the inner lid 58.

A control unit 35 having a display unit 35a is arranged in the lid recessed portion 53c on the upper surface of the lid 53. It is covered with a panel 54 provided with a transparent window portion 54a at a position where the display portion 35 can be visually recognized. That is, the lid recess 53c is hermetically covered by the panel 54.

The panel 54 is provided with a control unit intake / exhaust port 54b. Control unit intake / exhaust ducts 53a connecting the air inlet / outlet 53e and the control unit intake / exhaust port 54b are provided as concave grooves on both sides of the steam recovery unit 50, and the control unit intake / exhaust ducts 53a are covered with panels 54.

In the vicinity of the transparent window portion 54a of the panel 54, a menu such as the type of rice and how to cook, and an operation unit 52 for operating "rice cooking", "cutting", etc. are provided and connected to the control unit 35.

The lid recessed portion 53c on the upper surface of the lid 53 on which the control unit 35 is arranged is a control unit storage chamber 53d that is sealed from the inside of the lid 53, and the inside of the lid 53 is filled with water vapor by opening and closing the lid 53. Even if this is the case, water vapor does not condense on the control unit 35.

FIG. 8 is a view of the rice cooker viewed from diagonally behind. A control unit intake / exhaust port 54b is provided behind the panel 54 attached to the upper part of the lid 53. FIG. 9 is a diagram in which the panel 54 is removed from FIG.

In FIG. 8, on the front side of the transparent window portion 54a, the panel 54 has an operation unit 52 such as a cut / remove button for stopping rice cooking and heat retention, a reservation button for selecting reserved rice cooking, and the like for starting rice cooking. Rice cooking / reheating buttons are lined up. On the left side of the transparent window portion 54a, the finest buttons such as selecting the finest course, the small amount buttons such as selecting to beat a small amount of rice, and the steam heat retention buttons such as selecting steam heating are lined up. On the right side of the transparent window 54a, rice buttons for selecting the type of rice, course buttons for selecting the cooking course, and selection / time buttons for inputting the reserved rice cooking time are arranged.

As shown in FIG. 9, under each of the off / take button, the reservation button, and the rice cooking / reheating button, there is a switch for detecting that the button is pressed as a part of the control unit 35, and the finest button, the small amount button, and the like. Below each of the steam heat retention buttons is a switch that detects that the button has been pressed, and under each of the rice button, course button, and select / time button, there is a control unit 35 that detects that the button has been pressed. There is a switch as part.

The display content of the display unit 35a can be visually recognized through the transparent window unit 54a. The display unit 35a displays the operation command input by the operation unit 52, displays the rice cooking operation in response to the operation command, and displays the rice cooking status and the like.

Specifically, the selected cooking method is displayed on the display unit 35a, the setting for small-scale rice cooking is displayed, the selected heat retention setting is displayed, whether or not the course is under pressure, and the selected one is selected. Display rice, display time to cook, display reheating reservations, display selected reservations.

The control calculation unit (CPU) of the control unit 35 is used to operate the off / take button, the reservation button, the rice cooking / reheating button, the finest button, the small amount button, the steam heat retention button, the rice button, the course button, and the selection / time button. Based on this, the display of the display unit 35a is operated, and further, the heating of the heating coil 34 is controlled via the heating control unit 35b.

The air in the lid recess 53c easily enters and exits the control unit intake / exhaust port 54b from the air inlet / outlet 53e through the control unit intake / exhaust duct 53a. No dew condensation occurs on the portion 54a or the display portion 35a. Further, even if the ambient humidity is very high and dew condensation occurs, the air inside the lid recess 53c and the outside air naturally circulate to release the humidity to the outside, so that the cloudiness of the transparent window portion 54a does not continue.

The above duct consists of two or more parts. For example, it is a passage in which a groove of a recess is provided in the lid 53 and an upper portion is formed by the panel 54. Alternatively, a tubular pipe that forms a hollow with one component may be used. In the present invention, it is an air passage connecting the control unit storage chamber 53d and the outside of the main body.

FIG. 10 is a cross-sectional view of the control unit intake / exhaust duct 53a. Since the lid 53 rotates around the hinge shaft 55 to open and close, water that has entered from the control unit intake / exhaust port 54b during the opening / closing operation of the lid 53 does not flow into the lid recess 53c where the control unit 35 is arranged. The control unit intake / exhaust port 54b is provided behind the main body with respect to the lid recessed portion 53c.

Even when a large amount of water is splashed on the control unit intake / exhaust port 54b when the lid 53 is closed and water enters the control unit intake / exhaust duct 53a, the water also enters the control unit 35 of the lid recessed portion 53c. A portion 53f higher than the control unit intake / exhaust port is provided in the control unit intake / exhaust duct 53a so as not to be affected. Alternatively, a water intrusion prevention wall 53b may be provided.

In FIG. 10, a recessed structure is provided in the lid 53 and covered with a panel 54 from above to form a control unit intake / exhaust port 54b. However, by attaching another duct-shaped component to the lid 53, the lid 53 serves as a control unit intake / exhaust duct. be able to. The duct-shaped separate part may be a tube.

Although the control unit intake / exhaust port 54b is provided on the panel 54 in FIG. 8, it may be provided on the lid 53. Further, air may escape from the parts such as the panel 54 and the lid 53.

In FIG. 9, two control unit intake / exhaust ducts 53a are provided, but the number may be one or three or more.

31 ... main body, 32 ... inner pot, 33 ... heat insulating material, 34 ... heating coil, 35 ... control unit, 35a ... display unit, 35b ... heating control unit, 36 ... cooling fan, 37 ... temperature sensor, 38 ... cylinder, 39 ... bottom case, 39d ... circular convex part, 39e ... chamfered shape, 39f ... intake port, 39g ... exhaust port, 39h ... handle, 39j ... air duct, 39m ... side surface, 41 ... inner container, 47 ... temperature sensor Unit, 53 ... lid, 53a ... control unit intake / exhaust duct, 54 ... panel, 54a ... transparent window, 54b ... control unit intake / exhaust port

Claims (4)

1. An inner pot housed in the main body, a heating coil arranged outside the inner pot for inducing heating of the inner pot, a heating control unit for supplying power to the heating coil, and a heating control unit that can be opened and closed with respect to the inner pot. A panel having a lid and a display unit for displaying information related to rice cooking, and having a transparent window portion as a part of the lid is arranged, a recess is provided under the panel, and the display of the display unit is the display. A storage chamber for storing the display unit is configured in a space formed by the panel and the recess so as to be visible through the transparent window portion, and has an air passage connecting the storage chamber and the outside of the lid. Rice cooker.
2. The rice cooker according to claim 1, wherein the air passage is composed of a duct and an intake / exhaust port.
3. The rice cooker according to claim 2, wherein the intake / exhaust port is provided at a position rearward from the storage chamber.
4. The rice cooker according to claim 2 or 3, wherein the duct has a bottom surface or a wall at a position higher than the intake / exhaust port.

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