TWI391111B - Rice cooker - Google Patents

Description

Rice cooker

The present invention relates to a rice cooker for performing steam recovery, and more particularly to a configuration in which a check valve for preventing backflow of cooling water is provided.

In order to prevent the water vapor generated during cooking from being discharged around the main body of the rice cooker, the conventional rice cooker system guides the water vapor to the cooling water contained in the tank by the vapor conduit, and is diffused into the cooling water. Condensation (for example, refer to Patent Document 1).

[Previous Technical Literature]

[Patent Literature]

Patent Document 1: Japanese Laid-Open Patent Publication No. Hei 03-231613 (page 2, FIG. 1)

In the rice cooker in which the conventional vapor is recovered in the tank as described above, there is a problem that the cooling water of the tank flows back into the inner pot when the inner pot becomes a negative pressure.

In order to solve the above-described problems, the present invention has an object of preventing a backflow of cooling water in a tank after completion of cooking and improving the reliability and safety.

The rice cooker system according to the present invention comprises: a rice cooker body; an inner pot detachably mounted to the rice cooker body; a heating tool disposed inside the rice cooker body to heat the inner pot; the lid body And being disposed in the rice cooker body in a freely rotatable manner; and a steam treatment tank detachably disposed on a side wall of the rice cooker body to receive cooling for condensing steam generated during the rice cooking operation In the above-mentioned lid body, a steam conduit for connecting the lid body to the rice cooker body and the steam treatment tank when the lid body is closed is disposed in the lid body; and the upper cover of the steam treatment tank is provided with an external gas and a communication hole communicating with the inside of the groove and a communication pipe for communicating the inside of the steam pipe and the groove; and a side surface of the communication pipe is disposed on a side of the communication pipe at a predetermined water level of the cooling water, the communication pipe and a through hole penetrating through the upper space of the steam treatment tank; and a side surface of the communication hole is installed at a large pressure in the rice cooker body, and the through hole is closed at the rice cooker Kongkai Qi through the check valve when the pressure in the low pressure greater than atmospheric.

In the rice cooker according to the present invention, the steam treatment tank for recovering and cooling the water in the side wall of the rice cooker body and accommodating the steam generated during the rice cooking operation of the rice cooker body is detachably Provided in a lid body that is rotatably provided on the rice cooker body, and is disposed in the rice cooker body, and when the lid body is closed, the rice cooker body and the steam treatment tank are connected to each other. The vapor conduit has a vent hole for communicating the outside air and the inside of the tank, and a communication tube for communicating the inside of the steam conduit and the tank, and a cooling pipe is disposed on one side surface of the communication pipe. a through hole that penetrates the communication tube and the upper space of the vapor treatment tank above the predetermined water level, and the through hole is closed when the pressure of the rice cooker body is high on one side of the communication hole. When the pressure in the pot body is large, the check valve that opens the through hole when the air pressure is low; therefore, in the cooking step during cooking, the whole cooking material will boil and be filled in the rice cooker body. The gas system is advanced to the communication pipe via the vapor conduit, and the front end of the communication pipe is diffused to the cooling water contained in the steam treatment tank to be condensed. At this time, water vapor having a high gas pressure from the rice cooker body is connected to communicate with each other. In the tube, the valve system of the check valve closes the through hole of the connecting pipe. When the steaming step is changed, the pressure in the rice cooker body is relatively low, and the valve body of the check valve is stopped by the negative pressure. Opening the through hole of the connecting pipe, and at the same time, the external air system is introduced into the groove by the vent hole provided in the upper cover, and the external air system passes through the through hole and passes through the connecting pipe and the steam conduit to enter the rice cooker body, by The pressure in the rice cooker body is kept the same as the pressure of the outside air to prevent the cooling water from flowing backward.

1 is a perspective view showing a state in which a rice cooker and a lid body are opened in the embodiment of the present invention; and a second perspective view showing a state in which the lid body is opened and the steam treatment tank is removed in the same rice cooker; A perspective view showing a state in which a steam conduit is connected to an inner lid and a steam treatment tank in the same rice cooker; FIG. 4 is a cross-sectional view taken along line AA of FIG. 3; and FIG. 5 is a view showing a steam treatment tank of the same rice cooker; Fig. 6 is a perspective view showing a steam treatment tank of the same rice cooker; Fig. 7 is a sectional view taken along line BB of Fig. 6; and Fig. 8 is a view showing a steam treatment tank used in the same rice cooker; FIG. 9 is a cross-sectional view showing a state in which a check valve is attached to a communication pipe of a steam treatment tank of the same rice cooker; and FIG. 10 is a temperature curve in a rice cooking operation of the same rice cooker; A chart related to the heating source. Further, the temperature profile shown in Fig. 10 indicates the temperature change at the bottom of the inner pot detected by the bottom temperature sensor.

As shown in Figs. 1 to 4, the rice cooker main body 1 has a detachable inner pot 2 inside. The symbol 1a is a groove support that is provided to protrude from the front lower portion of the rice cooker body 1. This inner pot 2 is heated by a heating tool (not shown) provided inside the rice cooker main body 1.

In the rice cooker main body 1, the lid body 3 covered with the upper portion is detachably attached. Under the cover 3, the inner cover 4 is detachably mounted; the inner cover 4 is covered by a thermistor that detects the ambient temperature of the interior of the inner pot 2. The detector 5 is installed.

Further, the vapor introduction port 6 is provided in the inner lid 4, and one end of the vapor conduit 7 disposed in the lid body 3 is connected to the vapor introduction port 6. Symbol 8 is a sealing material that is attached to the other end of the vapor conduit 7.

Moreover, the steam processing tank 10 which accommodates the cooling water of the predetermined water level which condenses the steam which generate|occur|produces in the rice cooking operation is the detachable mounting on the front side of the rice cooker body 1.

As shown in Fig. 5, the steam treatment tank 10 is configured such that the width and the height of the rice cooker body 1 are the same, and the width in the front-rear direction is small, and the cooling water is accommodated in the upper side. The main body 11 is fitted into the upper opening of the groove main body 11, and the upper cover 12 that seals the opening is attached to the lower surface of the upper cover 12, and the gasket 13 having the same shape as the opening of the groove main body 11 is provided on one side of the upper cover 12. The vapor conduit socket 14 of the portion is integrally connected to the vapor conduit socket 14 and suspended in the tank body 11, and is attached to the flared sound absorbing member 16 at the lower end of the communication tube 15, and is covered in the groove. A slot cover 17 to which the front side of the body 11 is mounted.

Further, two vent holes 12a communicating with the outside air in the tank body 11 are attached to the upper cover 12.

Further, above the one side surface of the communication pipe 15, the two valve mounting holes 18 are mounted, and below the valve mounting holes 18, the water is positioned above the water level of the cooling water, and the through holes 19 are mounted.

Further, when the lid body 3 is closed to the rice cooker main body 1, as shown in Figs. 3 and 4, the other end of the sealing material 8 of the vapor conduit 7 disposed in the lid body 3 is attached to the vapor. The vapor conduit socket 14 of the upper cover 12 of the treatment tank 10 is configured to communicate with each other.

On one side of the communication tube 15 provided integrally with the upper cover 12, as shown in Figs. 7 and 9, the check valve 20 is attached by an insertion mechanism.

The check valve 20 is configured by, for example, a material having flexibility as a rubber, and as shown in Fig. 8, is composed of a quadrangular and thin plate-shaped valve body 21, and one of the valve bodies 21 The two valve fitting fitting projections 22 provided in the vicinity of the side portion and the side surface provided by the valve mounting fitting projection 22 of the valve body 21 are provided so as to surround the through hole 19 of the communicating pipe 15 The through hole 19 is larger and the annular convex portion 23 for improving the sealing property with the through hole 19 is provided.

Further, the hole area of the through hole 19 of the communication pipe 15 is desirably at least 1/6 of the diameter of the communication pipe 15 that is suspended in the groove body 11, and is the same as the diameter of the communication pipe 15 at most. also may. In this embodiment 1, the diameter of the tip end of the communication pipe 15 is 135 mm ² , and the hole diameter of the through hole 19 of the communication pipe 15 is 24 mm ² .

As described above, the hole area of the through hole 19 of the communication pipe 15 is larger than at least 1/6 of the diameter of the communication pipe 15 that is suspended in the groove body 11, because the diameter of the communication pipe 15 is, for example, 1/8. In the case of the outside air, the outside air may not be sufficiently intruded, and the cooling water may be reversed. If the area is equal to the area of the larger diameter of the communication pipe 15 that is larger than 1/6, the outside air is sufficiently entered, and the check valve 20 is stopped. Acting surely.

This check valve 20 is attached to one side surface of the communication pipe 15, as described below.

The two valve mounting fitting projections 22 of the check valve 20 are fitted in a state of being held by the two valve mounting holes 18 provided above one side surface of the communication pipe 15, so that the check valve 20 is The annular convex portion 23 is abutted against one side surface of the through hole 19 provided below the valve mounting hole 18 in the communication pipe 15, and the through hole 19 is closed by the valve body 21, and the check valve is stopped. 20 is mounted on one side of the communication hole 15.

The check valve 20 is provided in the valve body 21 by the annular convex portion 23, and the rigidity is improved as compared with the case where only the valve body 21 is provided, and the through hole 19 is surely closed.

In the first embodiment, the valve body 21 having the annular convex portion 23 of the check valve 20 closes the through hole 19 of the communication tube 15 before the start of rice cooking.

Moreover, as soon as the cooking action is started, as shown in Fig. 10, by preheating, the preheating step of 55 ° C is moved to the cooking step after a period of time, after the start of the cooking step, by strong fire It rises to around 100 ° C for a short time, but this is caused by partial boiling of the rice cooker in the bottom of the inner pot 2.

After that, the induction heating is continued at around 100 °C by a small fire, and the whole of the rice cooking starts to boil. When a large amount of water vapor is generated and the water vapor is filled in the inner pot 2, the moisture in the inner pot 2 disappears, and the inner pot disappears. The temperature at the bottom of 2 rises sharply. For example, when it reaches the cooking completion temperature of 124 ° C, it is transferred to the steaming step.

As described above, after the rice cooking operation is started, the preheating step is passed to the rice cooking step, and the heating is continuously induced at around 100 ° C, and the whole of the rice cooking starts to boil, the water vapor is generated in a large amount, and the water vapor is filled in the inner pot 2 In the internal state, the water vapor in the inner pot 2 is passed through the vapor introduction port 6 of the inner lid 4, passes through the vapor conduit 7, and reaches the communication tube 15, and is diffused from the tip end of the communication tube 15 to be accommodated in the vapor treatment tank 10. Cooling water W and condensing.

At this time, since the water vapor having a large gas pressure from the inner pot 2 passes through the communication pipe 15, the valve body 21 of the check valve 20 is pressed so as to close the through hole 19 of the communication pipe 15.

In addition, when the steaming step is completed, the pressure in the inner pot 2 is changed to a large pressure, and the valve body 21 of the check valve 20 is used as the fulcrum with the two valve mounting fitting projections 22 as the fulcrum. The through hole 19 of the communication pipe 15 is opened, and the external air system is introduced by the vent hole 12a provided in the upper cover 12, whereby the external gas introduced thereby can cause the valve body 21 of the check valve 20 Further, the through hole 19 can be surely opened, and the outside air system passing through the through hole 19 enters the inner pot 2 via the communication tube 15, the vapor conduit 7, and the vapor introduction port 6, by using the pressure in the inner pot 2 as The same as the external gas pressure, it can prevent the reverse flow of the cooling water.

Further, since the two vent holes 12a are provided in the upper cover 12 of the steam treatment tank 10, for example, even if the vent hole 12a at one place is clogged with rice grains, since the remaining vent holes 12a are vacant, the same as above, Under the same conditions as described above, the check valve 20 operates.

In the first embodiment, although the two vent holes 12a are provided in the upper cover 12 of the steam treatment tank 10, at least one of them is necessary, and of course, even if two or more vent holes 12a are provided.

Further, the hole area of the through hole 19 of the communication pipe 15 is set to be larger than 1/6 of the diameter of the distal end portion of the communication pipe 15, and is the same as the diameter of the distal end portion of the communication pipe 15, and the check valve 20 is surely The operation can improve the operational reliability of the check valve 20.

1. . . Rice cooker body

2. . . Inner pot

3. . . Cover

4. . . Inner cover

5. . . Cover sensor

6. . . Vapor introduction port

7. . . Steam conduit

10. . . Vapor treatment tank

11. . . Slot body

12. . . Upper cover

12a. . . Vent

14. . . Vapor conduit socket

15. . . Connecting pipe

17. . . Slot cover

18. . . Valve mounting hole

19. . . Through hole

20. . . Check valve

twenty one. . . Valve body

twenty two. . . Valve mounting projection

twenty three. . . Annular convex

W. . . Cooling water

1 is a perspective view showing a state in which a rice cooker and a lid body are opened in the embodiment of the present invention; and a second perspective view showing a state in which the lid body is opened and the steam treatment tank is removed in the same rice cooker; A perspective view showing a state in which a steam conduit is connected to an inner lid and a steam treatment tank in the same rice cooker; FIG. 4 is a cross-sectional view taken along line AA of FIG. 3; and FIG. 5 is a view showing a steam treatment tank of the same rice cooker; Fig. 6 is a perspective view showing a steam treatment tank of the same rice cooker; Fig. 7 is a sectional view taken along line BB of Fig. 6; and Fig. 8 is a view showing a steam treatment tank used in the same rice cooker; FIG. 9 is a cross-sectional view showing a state in which a check valve is attached to a communication pipe of a steam treatment tank of the same rice cooker; and FIG. 10 is a view showing a temperature in a rice cooking operation of the same rice cooker; A graph of the curve and the heating source.

1. . . Rice cooker body

1a. . . Slot support

2. . . Inner pot

3. . . Cover

4. . . Inner cover

5. . . Cover sensor

6. . . Vapor introduction port

7. . . Steam conduit

10. . . Vapor treatment tank

12. . . Upper cover

12a. . . Vent

14. . . Vapor conduit socket

Claims (3)

a rice cooker comprising: a rice cooker body; an inner pot, which is detachably mounted on the rice cooker body; a heating tool disposed inside the rice cooker body to heat the inner pot; the lid body is free a rotary method is provided in the rice cooker body; and a steam treatment tank is detachably provided on a side wall of the rice cooker body to accommodate cooling water for condensing steam generated during the rice cooking operation; In the above-described lid body, a steam conduit for connecting the lid body to the rice cooker body and the steam treatment tank when the lid body is closed is attached to the lid body, and the upper lid of the steam treatment tank is provided with an atmosphere and a groove. a communication hole communicating with the inside and a communication pipe that communicates the inside of the steam pipe and the groove, and a side surface of the communication pipe is disposed on a side surface of the communication pipe above a predetermined water level of the cooling water, the communication pipe and the above a through hole penetrating through the upper space of the steam treatment tank, and a pressure applied to the rice cooker body on one side of the communication hole is high, and the through hole is closed at the rice cooker Kongkai Qi through the check valve when the pressure in the low pressure greater than atmospheric. The rice cooker according to claim 1, wherein the check valve is a thin plate-shaped valve body formed of a material having flexibility, and is disposed adjacent to a side portion of the valve body to be held by Two valve mounting fitting projections that are fitted in the state in which at least two valve mounting holes are formed on one side surface of the communication pipe. The rice cooker according to the second aspect of the invention, wherein the valve system of the check valve is provided on a side surface on which the valve fitting fitting projection is provided, and when the through hole of the valve body is closed An annular convex portion surrounded by the through hole.