JPH0759B2 - rice cooker - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a rice cooker having a control board at the bottom of a main body.

2. Description of the Related Art Conventionally, this type of rice cooker has a structure as shown in FIG. 2 as disclosed in, for example, Japanese Utility Model Publication No. 63-46040.

That is, the bottom control board 5 is fixed at a fixed distance to the bottom plate 4 of the outer case 3 which accommodates the pan 1 for containing the food and the rice cooking heater 2, and the accommodation box 6 of the bottom control board 5 is provided on the side surface portion. The bottom plate 4 is provided so that its lower surface is exposed to the outside, an air circulation slit 7 is provided on the side surface of the housing box 6, and the bottom of the bottom control substrate 5 is covered with a back plate 9 having a ventilation hole 8.

However, with such a structure, although effective for heat insulation, since the bottom control board 5 is isolated and fixed to the bottom plate 4 attached to the outer case 3, the bottom control board 5 is not fixed. The wiring is difficult and the workability is poor, and there are many defects in the wiring work, and more lead wires need to penetrate the inside of the main body and the storage box 6, and eventually a large hole is required. See also pot 1
It is often used with water adhering to the outer peripheral portion and the bottom surface of the rice cooker, and a large amount of steam is generated by the heating of the rice cooking heater 2. This water vapor easily penetrates into the inside of the container, flows into the atmosphere of the bottom control substrate 5 through the lead wire holes, etc.
Due to the low temperature of the above electronic components, dew condensation could occur, causing a minute current portion of microcomputer control to leak and malfunction.

Therefore, an object of the present invention is to facilitate the assembling work, to make reliable wiring easy especially for a control board using a microcomputer, and to prevent the board from leaking at the time of vapor inflow.

Means for Solving the Problems And, in order to achieve the above object, the present invention is to attach a bottom control board to a lower portion of a protective frame via a mounting metal fitting, and to provide an operation control board having the bottom control board and a rice cooker switch with a flat cable. And a ventilation hole is provided in the side surface portion of the body near the connector portion of the flat cable of the bottom control board.

With the above-described configuration, the rice cooker of the present invention has the bottom control board fixed to the protective frame inside the body through the mounting bracket, so that the wiring can be carried out reliably and easily while maintaining the heat insulating structure, and the failure rate is greatly increased. Can be reduced to Also, the water attached to the bottom and side of the pan is heated by the rice cooking heater and the steam fills the inside of the main body. ,
Since the body is provided with the vent hole for the outside air in the vicinity, the humidity is lowered, and the malfunction of the control unit due to the dew condensation due to cooling and the leakage of the minute current portion can be prevented.

Embodiment One embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 10 is a pot for containing an object to be cooked, which is placed on the rice cooking heater 11. Reference numeral 12 is a protective frame to which the pan 10 is detachably mounted, and a cylindrical reflector 13 on the side surface and a heat shield 14 on the bottom surface.
Is attached and the entire protective frame 12 is thermally insulated to ensure thermal efficiency and improve heat retention. 15 is a pan sensor that detects the temperature of the pan 10, and a security lever that detects the presence or absence of the pan 10.
16 is provided at the bottom. Reference numeral 17 is a bottom control board for controlling the energization of the rice cooking heater 11 and other heaters.
It is attached to the protective frame 12 and the heat shield plate 14 via. 19
Is a synthetic resin substrate base that covers the upper surface of the bottom control substrate 17 and ensures insulation, and also contributes to heat insulation. Reference numeral 20 denotes a body that covers the protective frame 12 and the bottom control board 17 to form an outer cover, and a back plate 21 made of sheet metal is arranged in the bottom opening.
This back plate 21 is provided with holes 22 for draining water and for venting. 23 is a lid provided on the upper surface of the body 20 so as to be openable and closable,
An operation control board 25, which is arranged so as to cover the upper surface of the pan 10 and has a rice cooking switch 24, is provided in the central upper surface portion. Reference numeral 26 is a flat cable for connecting the bottom control board 17 and the operation control board 25, and an electric wire which is usually 10 to 14 cores and is a fine wire is used, and the bottom control board is passed through the hinge portion 27 of the lid 23.
They are connected by 17 connector parts 28. The bottom control board
17 is disposed on the side of the hinge portion 27, in particular, the connector 28 is provided close to the side of the hinge portion 27, the flat cable 26 can be set to the shortest length, smooth wiring is possible, and Flat cable with small current flow
26 is safe without touching hot parts. 29 is a vent hole provided on the side surface of the body 20, which is provided near the connector portion 28 of the bottom control board 17.

Next, the operation of the configuration of this embodiment will be described. Pot 10
Put the prescribed water and rice in and set it in the protective frame 12. At this time, it is often placed on the rice cooking heater 11 with water droplets attached to the outside of the pan 10. Also, water may accidentally flow into the protective frame 13, and when the rice cooking switch 24 is turned on as it is, a signal from the operation control board 25 is transmitted to the bottom control board 17 through the flat cable 26, and the rice cooker 11 Control the energization of the. When the rice cooking heater 11 is heated, the water in the protective frame 12 is heated to generate steam, and the pan sensor 15 and the rice cooking heater are heated.
Steam flows into the bottom control board 17 through the holes of the terminals 11. At this time, the humidity of the atmosphere of the electronic components on the bottom control board 17 rises, but since the heat-generating components such as the triac, transformer, and resistor are higher than the ambient temperature, no dew condensation occurs. But the connector
Since the 28 part does not generate heat and is normally installed at a position away from the heat source due to the heat resistant temperature of the connector 28, condensation may occur in high humidity and there is a risk of leakage, causing a malfunction and turning off the power. However, since the body 20 near this connector is equipped with the vent holes 30, the humidity will drop and there will be no condensation on the connector section 28. As a result, a reliable operation is carried out, and delicious rice can be always obtained from the cooking to the end of the Murashi. For wiring work to the bottom control board 17, the rice cooker heater 11, the flat cable 26, and other power sources can be wired while the bottom control board 17 is attached to the protective frame 12 via the mounting bracket 18, and the body 20 is connected. Since wiring is done without mounting, the wiring condition can always be checked from the outside, work is easy and reliable, and defects during wiring can be reduced.

EFFECTS OF THE INVENTION As described above, according to the present invention, the bottom control board is attached to the lower part of the protective frame via the mounting bracket, the bottom control board and the operation control board having the rice cooker switch are connected by the flat cable, and the side surface of the body is connected. Since a vent is provided near the connector part of the flat cable of the bottom control board, even if the water attached to the bottom of the pan or the protective frame is heated by the rice cooker and the humidity inside the container becomes abnormally high, a small current There is little risk of malfunction due to no dew condensation at the connector part where there is a high risk of flow leaks, and most wiring can be done with the body removed even during wiring work, so a reliable and reliable rice cooker Is what you can get.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway side view of a rice cooker showing an embodiment of the present invention, and FIG. 2 is a partial vertical sectional view showing a conventional rice cooker. 10 …… pan, 11 …… rice cooker, 12 …… protective frame, 17 …… bottom control board, 18 …… mounting bracket, 20 …… body, 21 …… back plate, 24 …… rice cooker switch, 25 …… Control board for operation, 26 ...
… Flat cable, 28 …… Connector part, 29 …… Ventilation hole.

Claims (1)

[Claims] 1. A pot for accommodating an object to be cooked, a protective frame for detachably mounting the pot, a rice cooking heater for heating the pot, and a body and a back plate for covering the protective frame to form an outer cover. Attaching a bottom control board to the lower part of the protective frame via a mounting bracket, connecting the bottom control board and an operation control board having a rice cooker switch with a flat cable, and providing a ventilation hole on a side surface of the body to the bottom control board. Rice cooker equipped near the flat cable connector section.