JPH0438918A - Automatic rice washer - Google Patents

Abstract

PURPOSE:To surely measure temperature and to realize stable rice boiling characterisitcs by making a temperature sensor abut against a central part on a bottom of a rice boiling pan and simultaneously rotating it with the rice boiling pan. CONSTITUTION:A temperature sensor 58 is provided in a position rotor 42 corresponding to a central part on a bottom of a pan. The temperature sensor 58 is formed integrally with the rotor 42 and simultaneously rotatable. Thus, a rice boiling pan 36 rotates together with the temperature sensor 58. Therefore, a contact face is not subjected to chapping or wear caused by the sliding of the temperature sensor 58 and the bottom of the pan. Further, temperature can be surely measured. The rotor 42 is formed in a hollow pipe, the lead wire 60 of the temperature sensor 58 is drawn to the outside and connected to a rotating coil 61, formed integrally with the rotor 42, and the output of the temperature sensor can effectively be taken out, based on the magnetic coupling of the rotating coil 61 and a fixed coil 62.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an automatic rice-washing rice cooker that automatically performs each process from washing rice to cooking and keeping the rice warm.

Prior Art As a conventional example, the authors have already developed an automatic rice-washing rice cooker shown in Fig. 3. The configuration will be explained below.

In the figure, 10 is the automatic rice cooker main body (hereinafter referred to as the main body), and a rice cooking chamber 11 is formed inside the main body 1o. A heating coil 12 is arranged, and a lid 1 is placed on the top.
It has 3. Further, the periphery and bottom of the main body 10 are formed by a cooking chamber lower member 14. Inside the rice cooker 11,
A rice cooker 16 is built-in. A coupling 16 is fixed to approximately the center of the bottom surface of the rice cooking pot 16, and this coupling 16 is removably fitted to a rotor 18 driven by a driving means such as a motor 17. , holds the rice cooking pot 15 rotatably. The rice cooker pot 15 has a flange portion 19 extending outward from the center of the rice cooker pot 15 around its upper opening. This flange part 19
The outer end protrudes to the outside of the rice cooking chamber 11 and reaches above the drain groove 2o formed around the upper end of the lower member 14 of the rice cooking chamber. The opening of the rice cooker 15 has an inner lid 21 that fits into the opening, and the inner lid 21 has a protrusion 22 formed near the opening of the rice cooker 16 so that there is a gap between the rice cooker 15 and the rice cooker 15. They are fitted with a gap 23 between them. and inner lid 21
is rotatably held by the lid 13. Further, the lid 13 is rotatably connected to the rice cooking chamber lower member 14 via a hinge. Further, the lid 13 is provided with a steam port 24, and a water supply pipe 25 is arranged so as to come into contact with the steam port 24 and supply water to the steam port 24. This water supply pipe 25 is connected to a water supply or a water supply pump (not shown) via an electromagnetic valve 26. rice cooker 15
A temperature sensor 27 that detects the temperature of the solenoid 28 moves up and down depending on whether the solenoid 28 is de-energized or energized. Note that the temperature sensor 27 is located off the center of rotation of the rice cooker 15, and is located toward the front of the center in the drawing.

20a in the figure is a drainage pipe.

The operation of the above configuration will be explained.

When rice is put into the rice cooker 15 and placed in the main body 1o to start operation, the solenoid 28 is first energized and the temperature sensor 27 moves downward. Next, the electromagnetic pulp 26 acts to open the flow path for a certain period of time, and a certain amount of water flows into the rice cooking pot 16 through the water supply pipe 25 and the steam port 24. Subsequently, the motor 1 is intermittently energized, and the rice cooker 15 intermittently repeats forward rotation and stop. In this way, the rice and water in the rice cooker 15 move, and the rice is washed due to the difference in the inertia of the rice and water. Next, move on to the dehydration process.

The rice cooker 15 is turned on by continuously energizing the motor 17,
The water is drained through the drain pipe 20a. Washing the rice is completed by repeating the steps up to this point several times. Subsequently, a predetermined amount of water for cooking rice is supplied, and the energization of the solenoid 28 is stopped. Temperature sensor 2
7 rises and comes into contact with the rice cooking pot 15, and then the rice cooking and warming process continues like a conventional electric rice cooker, and the series of rice cooking operations is completed.

Problems to be Solved by the Invention However, the conventional automatic rice-washing rice cooker is configured such that the temperature sensor 27 comes into contact with the bottom of the rice-cooking pot 15 closer to the outer periphery than the center of the bottom. It was difficult to accurately detect the bottom temperature of pot 15. Furthermore, when washing the rice cooker pot 16 at the end of rice cooking, the vicinity of the outer periphery of the bottom of the rice cooker pot 16 is easily damaged by impact when placed on a sink or the like. Therefore, if the contact position with the temperature sensor 27 is on the outer periphery of the bottom of the rice cooking pot 15, the sensitivity characteristics of temperature detection will vary, resulting in the problem that the rice cooking performance will not be constant. Ta.

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems, and its first object is to provide an automatic rice-washing rice cooker with stable rice-cooking characteristics. In relation to the first object, a second object of the present invention is to provide an automatic rice-washing rice cooker that is configured to more reliably measure the cooking temperature.

Means for Solving the Problems In order to achieve a first object, the present invention provides a rotor rotated by a driving means such as a motor, a rice cooker, a heating means for heating the rice cooker, and a rotor for heating the rice cooker. a temperature sensor for detecting temperature; an upper coupling integrally provided with the rice cooker at the center of the bottom of the rice cooker; and an upper coupling detachably fitted with the upper coupling and integrally provided at the upper end of the rotor. a lower coupling ring, the rotating shaft of the rotor is shaped like a hollow pipe, the temperature sensor is provided inside the rotating shaft, and a lead wire from the temperature sensor is formed to rotate integrally with the rotor. A fixed coil is connected to the rotating coil, and a fixed coil is provided on the outer periphery of the rotating coil coaxially with the rotating coil.

Moreover, in order to achieve the second object, the heating means is induction heating, and the outer periphery of the fixed coil is covered with a shield made of a conductive material.

Function The present invention has the above-mentioned first configuration, in which the temperature sensor that is in pressure contact with the substantially central bottom of the rice cooker detects the temperature of the first pot of the rice cooker,
Through magnetic coupling between a rotating coil connected to the output of the temperature sensor and rotating integrally with the rotor and a fixed coil connected to a control circuit provided around it, information on the temperature at the bottom of the rice cooker can be accurately obtained. It is something that can be detected and communicated.

Furthermore, with the second configuration, in addition to the effects of the first configuration, the magnetic coupling between the rotating coil and the stationary coil is not affected by surrounding magnetism even when induction heating heating means is used. This makes it possible to accurately and reliably transmit the temperature information of the rice cooker.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 and 2. In the figure, 3Q is the main body of the automatic rice cooker (hereinafter referred to as the main body), and there is a rice cooking chamber 31 inside it.
has been established. The rice cooking chamber 31 has a rice cooking pot 36 in its internal heating section, and an outer periphery heating coil 32 for induction heating and a central heating coil 33 for heating the center part on the bottom surface of the rice cooking pot 36 so as to surround the rice cooking pot 36. and rice cooker pot 3.
The rice cooking chamber is composed of a lid 34 that covers the upper part of the rice cooker 6, and a lower member 36 that forms the periphery and the bottom of the rice cooking chamber. An upper coupling 37 is provided approximately at the center of the bottom surface of the rice cooker 36, and this upper coupling 37 has a donut shape with a hollow center portion. The upper coupling 37 is driven by a large pulley 39 . driven by a driving means such as a motor 38 . Small pulley 40.
It is removably fitted to a lower coupling ring 37a provided at the upper end of a rotor 42 connected via a belt 41.

FIG. 2 shows the structure of the vicinity of the lower coupling 37a. That is, the lower coupling ring 37a has a fitting protrusion 57 extending radially from the center, and a guide ring portion 57a having a tapered shape that protrudes slightly from the fitting protrusion 67 is formed around the fitting protrusion 57. There is. Moreover, the center part is hollow and is in contact with the center part of the bottom of the rice cooker pot 36. This cavity is connected to a rotor 42 formed in a hollow shape, and the rotor 42 is connected to a large pulley 39.
It is fixed to a large pulley 39 so as to rotate together with the large pulley 39. Further, a temperature sensor 58 in which a heat-sensitive element such as a thermistor is enclosed is provided in this cavity and is urged upwardly by a spring 59 so as to be movable up and down. That is, the temperature sensor 58 is connected to the upper coupling 3 when the upper coupling 37 and the lower coupling 37a are fitted together.
The rice cooking pot 36 is pressed against the substantially central portion of the bottom surface of the rice cooking pot 36 exposed at the center of the rice cooker 7 . The rice cooking pot 36 also has a flange portion 43 extending outward from the center around its upper opening.

The outer end of the flange portion 43 protrudes to the outside of the rice cooking chamber 31 and reaches above the drain groove 44 formed around the upper end of the lower member 35 of the rice cooking chamber.

Reference numeral 46 denotes an inner lid that fits into the opening of the rice cooker 36. A convex portion 46 is formed near the periphery of the inner lid, and the inner lid 46 fits into the rice cooker 36 with a gap 47 between the inner lid and the rice cooker 36. There is. A substantially central portion of the inner cover 45 is fitted into an inner cover support pipe 49 via a flexible member 48 such as silicone rubber, and the inner cover 45 is detachably held and fixed to the inner cover support pipe 49. ing. Further, the inner lid support pipe 49 is rotatably held by the lid holder 51 via a bearing 60, and the lid holder 51 is connected to the lid 3.
4 is integrally fixed. Further, the lid 34 is rotatably coupled to the rice cooking chamber lower member 36 via a hinge. 5
2 is a steam port provided on the lid 34 so as to be located above the inner lid 45; 53 is a water supply pipe that comes into contact with the steam port 52 and supplies water using the steam port 52; It is connected to a water supply or water pump that is not shown. Further, a valve 55 is provided at the lower end of the inner lid support pipe 49.
is provided.

A lead wire 60 of a temperature sensor 58 is installed inside the rotor 42.
The groove passes through the inside thereof and is connected to a rotating coil 61 formed integrally with the large pulley 39. A fixed coil magnetically coupled to the rotating coil is provided on the outer periphery of the rotating coil tV61 and is connected to the controller 63.

Further, a shield 64 made of a conductive material such as aluminum is formed around the fixed coil 62.

The controller 63 is a motor 38 that rotates the rice cooker @36.
．． Peripheral heating coil 32. It controls the central heating coil 33, electromagnetic pulp 54, etc.

The operation of the above configuration will be explained below. First, the rice cooking pot 36 is set in the heating section provided in the rice cooking chamber 31.

In this case, the upper cup link 37, which is integrally formed with the rice cooker pot 36, is led by the bolt-in link 5a provided on the lower cup ring 37a, and this fitting is performed extremely easily and accurately. At the same time, the temperature sensor 68
As a result, the upper ring 3 accurately contacts the bottom surface of the rice cooker pot 36 inside the third ring, that is, the center of the rice cooker pot 36. Next, when rice is placed in the rice cooker 36 and the main body 30 starts operating, the controller 63 operates to open the electromagnetic pulp 54 for a certain period of time.

That is, a certain amount of water flows into the rice cooker pot 36 from the water supply pipe 53 through the steam port 52. Next, the motor 38 is intermittently energized, the rice cooker 36 is repeatedly rotated and stopped intermittently, and the rice is washed in the same manner as described in the conventional example. Following this rice washing process, a dehydration process is performed. Washing the rice is completed by repeating the steps up to this point several times. Then, after the final draining (dehydration) is completed, water is supplied to a predetermined amount, and the rice cooking and warming process continues like a conventional electric rice cooker, completing the series of rice cooking operations.

Now, when the rice cooking work is finished and the rice cooking pot 36 is to be cleaned, in this embodiment, the upper coupling 3 is connected to the medium heat part of the rice cooking pot 36.
7 is provided in one piece, so that it is difficult to receive a shock when the rice cooker pot 36 is placed on a sink, for example. In other words, the center of the bottom of the rice cooker 36 is usually arched, and the periphery is protected by the upper coupling 37, so there is no direct contact with any structure.

Therefore, the center part of the bottom of the rice cooker 36 is hard to get scratched, and in this embodiment, the temperature sensor 58 is provided in the position rotor 42 corresponding to the center part of the bottom of the pot, which is hard to get scratched. By forming the temperature sensor 58 integrally with the rotor 42 and making it rotatable at the same time, the rice cooker 3
6 and the temperature sensor 58 rotate at the same time, there is no risk of roughness or abrasion of the contact surface due to sliding between the temperature sensor 58 and the bottom of the pot, and it is possible to more reliably measure the force and temperature. Further, the rotor 42 is formed into a hollow pipe shape,
The lead wire 60 of the temperature sensor 58 is connected to the outside and connected to a rotating coil 61 formed integrally with the rotor 42, and a fixed coil 62 is provided so as to surround this rotating coil/L/61. Koi/l/61 and fixed coil 62
This magnetic coupling makes it possible to reliably extract the output of the temperature sensor 58.

In addition, since a shield 64 made of a conductive material such as aluminum is formed on the outer periphery of the fixed coil 1V62, the controller 63 can receive a more reliable output without being affected by the magnetism of the heating coils 32 and 33. It can be transmitted.

In addition to the above, according to this embodiment, the contact position between the temperature sensor 58 and the bottom of the rice cooking pot 63 is always constant, the contact position is set to a position that is unlikely to be damaged, and in addition, the temperature sensor 58 is This makes it possible to obtain an output of 1000 yen, making it possible to realize an automatic rice-washing rice cooker with more stable rice cooking characteristics.

Effects of the Invention As is clear from the above description of the embodiments, according to the present invention, the temperature sensor comes into contact with the center of the bottom of the rice cooker and rotates simultaneously with the rice cooker. This eliminates the risk of roughness and wear on the contact surface, making it possible to measure temperature reliably. In addition, by connecting the output of the temperature sensor to a rotating coil formed integrally with the rotor, and providing a fixed coil surrounding this rotating coil, the temperature sensor can be This will ensure that the output can be increased.

In addition, by forming a shield made of a conductive material such as aluminum around the fixed coil, accurate and reliable output of the temperature information of the rice cooker is transmitted to the controller without being affected by the magnetism of the induction heating coil. It will be done.

As stated above, according to this embodiment, the contact position between the temperature sensor and the bottom of the rice cooker is always constant, the contact position is set at a position that is unlikely to be damaged, and in addition, the output of the temperature sensor is ensured. It is possible to realize an automatic rice-washing rice cooker that can be taken out and has more stable rice cooking characteristics.

[Brief explanation of the drawing]

FIG. 2 is a sectional view of an automatic rice-washing rice cooker. 32.33...Outer heating coil, center heating coil/l/ (heating means), 36...Rice cooking pot, 37
... Upper blade knob ring, 37a ... Lower coupling ring, 42 ... Rotor, 58 ...
・Temperature sensor, 60...Lead wire, 61...
... Rotating coil, 62 ... Fixed coil, 64
......shielding body.

Claims (2)

[Claims] (1) A rotor rotated by a driving means such as a motor,
A rice cooker, a heating means for heating the rice cooker, a temperature sensor for detecting the temperature of the rice cooker, an upper coupling integrally provided with the rice cooker at the center of the bottom of the rice cooker, and an upper cup. a lower coupling that is removably fitted to the ring and is integrally provided at the upper end of the rotor, the rotation shaft of the rotor is in the shape of a hollow pipe, and the temperature sensor is provided inside the rotation shaft, and the temperature sensor Connect the lead wire from the sensor to a rotating coil that rotates together with the rotor.
This automatic rice cooker has a rotating coil, a coaxial coil, and a fixed coil around the outer circumference of this rotating coil. (2) The automatic rice washer and rice cooker according to claim 1, wherein when the heating means is induction heating, the outer periphery of the fixed coil is covered with a shield made of a conductive material.