TWI556778B - Cooker - Google Patents

Description

Rice cooker

The present invention relates to a rice cooker.

In the past, for example, there is a rice cooker (for example, refer to Patent Document 1), the rice cooker includes: a container for loading rice and water; a protective frame supporting the container; and a shell heater disposed in the protective frame The upper portion is heated to the side portion of the container and is M-shaped in a side view (in the lateral direction).

[Prior patent documents] [Patent Literature]

[Patent Document 1] Japanese Laid-Open Patent Publication No. Hei 6-30840 ([0014], FIG. 2)

However, the temperature in the vicinity of the lead portion of the rice cooker-type case heater described in Patent Document 1 is lower than the temperature at a position other than the vicinity of the lead portion of the case heater, and temperature unevenness occurs in the inner pot. Therefore, there is a problem that dew adheres to the inner surface of the inner pot corresponding to the vicinity of the lead portion of the case heater.

The present invention has been developed as a background of the above-described problems, and an object of the present invention is to provide a rice cooker which can suppress temperature unevenness of an inner pot more than ever.

The rice cooker of the present invention comprises: an inner pot having an upper opening; a main body having a pot accommodating portion for accommodating the inner pot; and a heat generating means provided on the inner pot accommodating portion and heating the side surface of the inner pot, the heat generation The means has a folded portion that is folded into a plurality of sections in the up-down direction of the inner pot, and the direction in which the end side of the heat generating means is drawn is opposite to the direction in which the other end side of the heat generating means is drawn.

According to the invention, the direction in which the end side of the heat generating means is drawn is opposite to the direction in which the other end side of the heat generating means is directed. Therefore, the temperature unevenness of the inner pot can be suppressed more than ever.

1‧‧‧ Ontology

1a‧‧‧ inner pot accommodating department

2‧‧‧Side heat sink

3‧‧‧ inner pot

10‧‧‧ cover

11‧‧‧Face heating body

11A‧‧‧heating line

11A1, 11A2, 11A3‧‧‧ extensions

11A4, 11A5‧‧‧Folding

11B‧‧‧Aluminum foil

11C‧‧‧Adhesive means

11a‧‧‧Feet line (fever means)

11b‧‧‧ glass core

11c‧‧‧Insulator

End of 11e1, 11e2‧‧

11g1, 11g2‧‧‧ lead-out

20‧‧‧Power circuit board

20a‧‧‧Connector

20b‧‧‧Wire

30‧‧‧Connecting components

100‧‧‧cooking machine

D1, d2‧‧‧ distance

Fig. 1 is a perspective view of a rice cooker 100 according to a first embodiment of the present invention.

Fig. 2 is a perspective view showing a state in which the lid body 10 of the rice cooker 100 according to the first embodiment of the present invention is opened.

Fig. 3 is a cross-sectional view taken along line X-X of the rice cooker 100 of Fig. 1.

Fig. 4 is a Y-Y sectional view of the rice cooker 100 of Fig. 1.

Fig. 5 is a Z-Z sectional view of the rice cooker 100 of Fig. 1.

Fig. 6 is a partial enlarged view of Fig. 5.

Fig. 7 is a schematic view showing a heating wire 11A of the rice cooker 100 according to the first embodiment of the present invention.

Fig. 8 is a schematic view showing the planar heat generating body 11 of the rice cooker 100 according to the first embodiment of the present invention.

FIG. 9 is a schematic view showing a state in which the planar heat generating body 11 of the rice cooker 100 according to the first embodiment of the present invention is placed on the side surface heat dissipation plate 2.

Fig. 10 is a schematic view showing a planar heat generating body 11 of the rice cooker 100 according to the second embodiment of the present invention.

Fig. 11 is a schematic view showing a planar heat generating body 11 of the rice cooker 100 according to the third embodiment of the present invention.

Fig. 12 is a schematic view showing a planar heat generating body 11 of the rice cooker 100 according to the fourth embodiment of the present invention.

Figure 13 is a cross-sectional view showing a rice cooker 100 according to a fifth embodiment of the present invention.

Hereinafter, the rice cooker 100 of the present invention will be described in detail using the drawings.

First embodiment

Fig. 1 is a perspective view of a rice cooker 100 according to a first embodiment of the present invention. Fig. 2 is a perspective view showing a state in which the lid body 10 of the rice cooker 100 according to the first embodiment of the present invention is opened. Fig. 3 is a cross-sectional view taken along line XX of the rice cooker 100 of Fig. 1 (the position of the XX cross section is the position where the lid body 10 and the main body 1 are joined together, and Fig. 3 is the state in which the lid body 10 has been removed from above. Observe the picture of the body 1). Fig. 4 is a Y-Y sectional view of the rice cooker 100 of Fig. 1. Fig. 5 is a Z-Z sectional view of the rice cooker 100 of Fig. 1. Fig. 6 is a partial enlarged view of Fig. 5. Fig. 7 is a schematic view showing a heating wire 11A of the rice cooker 100 according to the first embodiment of the present invention.

As shown in Fig. 1, the rice cooker 100 includes a main body 1, and a lid body 10 that is attached to the upper portion of the main body 1 so as to be openable and closable. As shown in Figure 2 and Figure 3, The inner pot accommodating portion 1a is provided in the body 1. The inner pot 3 is housed in the inner pot accommodating portion 1a.

As shown in Fig. 4, the inner pot 3 is a member that is open on the upper surface, and rice, water, and the like are housed in the inner pot 3. The inner side of the inner pot 3 is made of, for example, aluminum, and the outer side of the inner pot 3 is made of, for example, stainless steel. The inner surface of the inner pot 3 is processed by applying a fluorine coating. As shown in Fig. 5, the side heat sink 2 is provided on the inner wall of the pot housing portion 1a facing the outer side of the inner pot 3. The side heat sink 2 is formed in a ring shape so as to surround the periphery of the inner pot 3. The planar heat generating body 11 (shell heat source) is provided outside the side heat sink 2 . As shown in Fig. 6, the planar heat generating body 11 includes a heating wire 11A, an aluminum foil 11B, and an adhesive means 11C.

As shown in Fig. 7, the heater wire 11A includes heat generation means for the heater wire 11a, the glass core 11b, and the insulator 11c. The heating wire 11A corresponds to the heat generating means of the present invention. The heating wire 11a is made of, for example, a nickel-chromium wire, a copper-nickel wire, or the like. The heating wire 11a is wound around the outer surface of the glass core 11b, for example, in a spiral shape. The insulator 11c is a member that covers the heating wire 11a, and is made of, for example, a rubber or the like. The details of the heater wire 11A will be described using Figs. 8 and 9 which will be described later.

The aluminum foil 11B is a member that covers the heating wire 11a and is used to conduct heat generated from the heating wire 11a to the side heat dissipation plate 2. Further, in the first embodiment, the aluminum foil 11B is exemplified as a member that conducts heat generated from the heating wire 11a to the side surface heat dissipation plate 2. However, the present invention is not limited thereto, and various members having excellent thermal conductivity can be used.

The adhesive means 11C is a member for attaching the heating wire 11A and the aluminum foil 11B to the side heat dissipation plate 2, and is composed of, for example, a double-sided tape. The heater wire 11A and the aluminum foil 11B are provided on one surface of the adhesion means 11C. Side heat sink 2 setting On the other side of the adhesive means 11C. In a state where the heating wire 11A and the aluminum foil 11B are provided on one surface of the adhesive means 11C, the heating wire 11A is located between the aluminum foil 11B and the adhesive means 11C, and the heating wire 11A is sandwiched by the aluminum foil 11B and the adhesive means 11C.

Fig. 8 is a schematic view showing the planar heat generating body 11 of the rice cooker 100 according to the first embodiment of the present invention. FIG. 9 is a schematic view showing a state in which the planar heat generating body 11 of the rice cooker 100 according to the first embodiment of the present invention is placed on the side surface heat dissipation plate 2. In addition, in the following description, the up-down direction of the paper of FIG. 9 is the vertical direction of the side surface heat dissipation plate 2 and the planar heat generating body 11.

As shown in Fig. 8, the planar heat generating body 11 is, for example, a heating means for forming a rectangular cross section, and is a person who is energized when cooking or during heat preservation. The heating wire 11A extends in the longitudinal direction of the planar heat generating body 11 (aluminum foil 11B), and is formed so as to be folded into a plurality of sections in the upper and lower directions of the inner pot 3.

Specifically, for example, the heater wire 11A includes extension portions 11A1, 11A2, and 11A3 and folding portions 11A4 and 11A5. The extending portions 11A1, 11A2, and 11A3 are portions of a straight line extending in the longitudinal direction of the planar heat generating body 11 (aluminum foil 11B) in the heating wire 11A. The extending directions of the extending portions 11A1, 11A2, and 11A3 are parallel to each other. The folded portions 11A4 and 11A5 are bent in a portion such as a U-shape in the heating wire 11A. In the following description, one end in the longitudinal direction of the planar heat generating body 11 is referred to as an end portion 11e1, and the other end in the longitudinal direction of the planar heat generating body 11 is referred to as an end portion 11e2.

The lead portion 11g1 through which the heating wire 11A passes is provided at the end portion 11e1. The lead portion 11g2 through which the heating wire 11A passes is provided at the end portion 11e2. The heating wire 11A is connected to the connecting member 30 at the lead portions 11g1 and 11g2. Connection structure The member 30 is a member that covers one of the heater wires 11A, and is provided at least in the lead portions 11g1 and 11g2 of the planar heat generating body 11. The connecting member 30 is composed of, for example, a hollow cylindrical member, and has, for example, an outer diameter that is thicker than the outer diameter of the heating wire 11A. Here, the amount of heat generated by the portion of the heating wire 11A covered by the connecting member 30 is smaller than the amount of heat generated by the portion of the heating wire 11A that is not covered by the connecting member 30. Therefore, when the heating wire 11A generates heat, the amount of heat generation in the vicinity of the connecting member 30 is smaller than the other positions.

Next, an example of the step of forming the heater wire 11A of Fig. 8 will be described. For example, the heater wire 11A is extended to form the extension portion 11A1 from the end portion 11e1 side toward the end portion 11e2 side. Next, the heater wire 11A is folded to form a folded portion 11A4 in the vicinity of the end portion 11e2. Then, the heater wire 11A is extended to form the extension portion 11A2 from the end portion 11e2 side toward the end portion 11e1 side. Next, the heater wire 11A is folded to form a folded portion 11A5 in the vicinity of the end portion 11e1. Then, the heater wire 11A is extended to form the extension portion 11A3 from the end portion 11e1 toward the end portion 11e2 side. In this way, the heater wire 11A has a zigzag shape. At this time, one end of the heater wire 11A is located on the side of the end portion 11e1, and the other end of the heater wire 11A is located on the side of the end portion 11e2. That is, the heating wire 11a is drawn from both ends of the planar heating element 11.

The connector 20a and the wire 20b are provided on both end sides of the heater wire 11A. The connector 20a is connected to a power supply board (not shown) and a wire 20b. The wire 20b is connected to the connector 20a and the connecting member 30. The power supply circuit board is provided, for example, on the back side of the body 1. Further, for example, a control means (not shown) controls the amount of heat generated by the heating wire 11A. Thereby, the heat generated from the heating wire 11A is conducted to the inner pot 3 via the side heat radiating plate 2, and the object to be heated inside the inner pot 3 is heated.

As shown in Fig. 9, in a state where the planar heat generating body 11 is provided on the outer side of the side surface heat radiating plate 2, the end portion 11e1 and the end portion 11e2 are in a state of not being overlapped and close to each other, and both ends of the heating wire 11A are connected to the power source. Board connection. The planar heat generating body 11 formed in this manner is formed by forming the heating wire 11A as an outer side and forming a ring shape so that both end portions face each other.

Here, in the case where the both ends of the heating wire 11A are drawn only from one end (for example, the end portion 11e1) of the planar heat generating body 11, the connecting member 30 is located in the vicinity of the end portion 11e1, so that it is near the end portion 11e1. The calorific value is smaller than the amount of heat generated near the end portion 11e2. Therefore, temperature unevenness occurs in the inner pot 3.

In contrast, the rice cooker 100 of the first embodiment includes the inner pot 3 having the upper opening, the main body 1 having the inner pot accommodating portion 1a for accommodating the inner pot 3, and the inner pot accommodating portion 1a and the inner pot 3. The heating wire 11a heated on the side, the heating wire 11a has folded portions 11A4 and 11A5 which are folded into a plurality of stages in the upper direction of the inner pot 3, and the leading end side of the heating wire 11a is connected to the other end of the heating wire 11a. The direction of the side is reversed. Further, since the planar heat generating body 11 is formed in a ring shape, since the end portions 11e1, 11e2 face each other and the folded portions 11A4, 11A5 face each other, the heat generating wire 11a becomes dense, and the amount of heat generated at this position becomes large. Therefore, the temperature unevenness of the inner pot 3 can be suppressed more than ever.

Further, the number of times the heating wire 11A is bent is as shown in the drawing, and is not limited to two. For example, the deeper the inner pot 3 is, the longer the heating wire 11A is, and the number of folding is increased, whereby the inner pot 3 can be more uniformly heated.

Moreover, the example in which the heat generated from the heating wire 11A is conducted to the inner pot 3 via the side heat sink 2, the aluminum foil 11B, and the adhesion means 11C is described, but It is not limited to this. For example, the side heat dissipation plate 2, the aluminum foil 11B, and the adhesion means 11C may be omitted, and the heat generated from the heating wire 11A may be directly transmitted to the inner pot 3.

Second embodiment

In the second embodiment, unlike the first embodiment, the number of turns of the heating wire 11a is made different. In the second embodiment, the items that are not particularly described are the same as in the first embodiment, and the same functions and configurations are denoted by the same reference numerals.

Fig. 10 is a schematic view showing a planar heat generating body 11 of the rice cooker 100 according to the second embodiment of the present invention. As shown in Fig. 10, the number of turns of the folded portion 11A5 in the heating wire 11a is made denser than the other portions. Then, although not shown, the number of turns of the folded portion 11A4 in the heating wire 11A is denser than the other portions. In other words, the heating wire 11a is configured such that the heat generation amount of the folded portions 11A4 and 11A5 in the heating wire 11A is larger than the heat generation amount of the extending portions 11A1, 11A2, and 11A3 in the heating wire 11A.

As described above, in the rice cooker 100 of the second embodiment, the number of turns of the folded portions 11A4 and 11A5 in the heating wire 11A is made denser than the other portions. Therefore, in the vicinity of the lead portions 11g1 and 11g2 where the amount of heat generation is low in the side heat sink 2, the amount of heat generation can be secured. Therefore, the temperature unevenness of the inner pot 3 can be suppressed more than ever.

Further, an example in which the number of turns of the folded portions 11A4 and 11A5 in the heating wire 11A is made denser than the other portions has been described, but the present invention is not limited thereto. For example, it is also possible to make the number of turns of only one of the folded portions 11A4 and 11A5 in the heating wire 11A to be denser than the other portions.

Further, it is not limited to forming only the folded portion 11A4 in the heating wire 11A, The example in which the number of turns of 11A5 is denser than the other portions may be made not only in the heating wire 11a of the folded portion 11A4 but also in the number of turns of the heating wire 11a of the extending portions 11A1, 11A2, 11A3 located in the vicinity of the folded portion 11A4. More dense.

Moreover, in the case where the number of folds of the heating wire 11A is larger, the number of turns of at least one of the folded portions may be made small.

Further, the second embodiment is not limited to the zigzag-shaped heating wire 11a, and may be applied to the M-shaped heating wire 11a. In this case as well, since the amount of heat generated in the vicinity of the lead portion in the heat generating wire 11a is extremely small, the number of turns of the heat generating wire 11a in the folded portion located near the lead portions 11g1 and 11g2 may be made small. Thereby, the temperature unevenness of the inner pot 3 can be suppressed more than ever.

Third embodiment

The third embodiment differs from the first embodiment in that the number of turns of the heating wire 11a is different. In the third embodiment, the items that are not particularly described are the same as in the first embodiment, and the same functions and configurations are denoted by the same reference numerals.

As shown in Fig. 11, the number of turns of the heating wire 11a in the extending portion 11A1 is denser than the number of turns of the heating wire 11a in the extending portions 11A2, 11A3. The number of turns of the heating wire 11a in the extending portion 11A2 may be the same as the number of turns of the heating wire 11a in the extending portion 11A3, or may be different.

As described above, in the rice cooker 100 of the third embodiment, the number of turns of the heat generating wire 11a in the extending portion 11A1 is denser than the number of turns of the heat generating wire 11a in the extending portions 11A2 and 11A3. Therefore, the opening (upper) side of the inner pot 3 which is relatively low in temperature can be heated more strongly. Therefore, it is possible to suppress a decrease in the temperature of the upper portion of the inner pot 3 in which the temperature of the inner pot 3 is likely to become low, and it is possible to suppress the inner pot 3 more than ever. The temperature is uneven.

Further, in the case where the number of folds of the heater wire 11A is larger, for example, the number of turns of the heat generating wire 11a located at the uppermost portion may be made denser than the number of turns of the heat generating wire 11a of the other portion. In this way, the temperature unevenness of the inner pot 3 can be suppressed more than ever.

Further, the third embodiment can also be applied to the M-shaped heating wire 11a. In this case, the number of turns of the heating wire 11a located at the uppermost portion may be made denser than the number of turns of the heating wire 11a of the other portion. Thereby, the temperature unevenness of the inner pot 3 can be suppressed more than ever.

Fourth embodiment

In the fourth embodiment, unlike the first embodiment, the distance between the extending portion 11A1 and the extending portion 11A2 is made shorter than the distance between the extending portion 11A2 and the extending portion 11A3. In the fourth embodiment, the items that are not particularly described are the same as in the first embodiment, and the same functions and configurations are denoted by the same reference numerals.

Fig. 12 is a schematic view showing a planar heat generating body 11 of the rice cooker 100 according to the fourth embodiment of the present invention. As shown in Fig. 12, the distance d1 between the extending portion 11A1 and the extending portion 11A2 is shorter than the distance d2 between the extending portion 11A2 and the extending portion 11A3.

As described above, in the rice cooker 100 of the fourth embodiment, the distance d1 between the extending portion 11A1 and the extending portion 11A2 is shorter than the distance d2 between the extending portion 11A2 and the extending portion 11A3. Therefore, it is possible to suppress a decrease in temperature of the upper portion of the inner pot 3 in which the temperature of the inner pot 3 is liable to become low. Therefore, the temperature can be made uniform, and the temperature unevenness of the inner pot 3 can be suppressed more than ever.

Further, in the case where the number of folds of the heater wire 11A is larger, for example, the distance from the number of turns of the upper heat generating wire 11a to the heat generating wire 11a of the adjacent lower segment is made to be larger than the distance between the adjacent heat generating wires 11a. The distance is shorter. Thereby, the temperature unevenness of the inner pot 3 can be suppressed more than ever.

Further, the fourth embodiment can also be applied to the M-shaped heating wire 11a. In this case, the distance from the number of turns of the uppermost heating wire 11a to the heating wire 11a of the adjacent lower segment may be made shorter than the distance between the adjacent heating wires 11a. Thereby, the temperature unevenness of the inner pot 3 can be suppressed more than ever.

Fifth embodiment

In the fifth embodiment, unlike the first embodiment, the positions of the end portions 11e1 and 11e2 of the heating wire 11a are determined based on the relationship with the power supply board 20. In the fifth embodiment, the items that are not particularly described are the same as in the first embodiment, and the same functions and configurations are denoted by the same reference numerals.

Fig. 13 is a cross-sectional view showing the rice cooker 100 according to the fifth embodiment of the present invention (the cross-sectional position is the position of the side heat dissipation plate 2 inside the main body 1 and is a cross-sectional view in parallel with the ground contact surface at this position).

As shown in Fig. 13, the power supply circuit board 20 is provided inside the main body 1 and closer to the back side than the inner pot 3. When the planar heat generating body 11 is disposed along the circumferential direction of the inner pot 3, the end portions 11e1, 11e2 are located in the vicinity of the power supply circuit board 20. That is, when the planar heat generating body 11 is provided along the circumferential direction of the inner pot 3, the power source circuit board 20 is located in the vicinity of the phase sticking portion of the planar heat generating body 11. Here, the end portions 11e1, 11e2 (phase pasting portions) are provided, for example, on the outer side of the inner pot 3 closest to the power supply circuit board 20 in the outer side of the inner pot 3. That is, along the circumferential direction of the inner pot 3 The heating wire 11A of the heater wire 11A disposed closest to the one end side and closest to the other end side is disposed outside the inner pot 3 closest to the power supply circuit board 20 in the outer side of the inner pot 3.

As described above, the rice cooker 100 of the fifth embodiment is disposed at the both ends of the inner heat generating body 11 disposed along the circumferential direction of the inner pot 3, and is disposed closest to the power supply circuit board 20 in the outer side of the inner pot 3. The outside of the inner pot 3. Therefore, the distance to the wiring is shortened, and the length of the heating wire 11A can be suppressed, and the workability of the rice cooker 100 is improved, and the cost of the heating wire 11A is lowered.

Further, an example has been described in which the end portions 11e1, 11e2 (phase pasting portions) are provided on the outer side of the inner pot 3 which is closest to the outer side of the inner pot 3 of the power supply circuit board 20, but the invention is not limited thereto. For example, the end portions 11e1, 11e2 (phase pasting portions) cannot be disposed in the outer side of the inner pot 3 closest to the outer side of the inner pot 3 of the power supply circuit board 20 due to various wirings provided inside the main body 1. In other cases, the end portions 11e1 and 11e2 (phase pasting portions) may be disposed outside the inner pot 3 as close as possible to the outer side of the inner pot 3 of the power supply circuit board 20.

100‧‧‧cooking machine

10‧‧‧ cover

3‧‧‧ inner pot

1a‧‧‧ inner pot accommodating department

1‧‧‧ Ontology

Claims (5)

a rice cooker comprising: an inner pot having an upper opening; a body having an inner pot accommodating portion for accommodating the inner pot; and a heating means disposed in the inner pot accommodating portion and heating the side of the inner pot; The heating means is characterized in that the heating means has a heating wire wound in a spiral shape, and is formed into a folded portion which is folded into a plurality of sections in the upper and lower directions of the inner pot, wherein the number of turns of the heating wire in the folded portion is higher than that of the other The number of turns of the heating wire is more dense; the direction of the end side of the heat generating means is opposite to the direction of the other end of the heat generating means. The rice cooker of claim 1, wherein the heat generating means is zigzag in a state in which the inner pot is viewed from the side. The rice cooker according to claim 1 or 2, wherein the number of turns of the spirally wound heating wire located at the uppermost portion is denser than the number of turns of the spirally heated wire of the other portion . A rice cooker according to claim 1 or 2, wherein the distance from the heating wire located in the uppermost portion to the heating wire adjacent to the lower portion is shorter than the distance between the other adjacent heating wires. The rice cooker of claim 1 or 2, further comprising a power circuit board electrically connected to the heat generating means; the heat generating means is disposed along a circumferential direction of the inner pot, and is closest to the The outer side of the inner pot of the power circuit board is provided with a heat generating means located closest to the one end side and closest to the other end side.