JPS5924247Y2 - Heat retention type gas rice cooker - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rice cooker that cooks rice with a gas burner and keeps it warm with an electric heater.

This type of rice cooker is required to have the conflicting functions of smoothly blowing combustion air into the gas burner and exhausting it when cooking rice, and preventing air flow when keeping the rice warm.

The present invention suppresses the fluidity of combustion air and exhaust gas to the extent that the combustion condition is not deteriorated, and examples thereof will be described below with reference to the drawings.

Reference numeral 1 denotes a base having a gas burner 2 disposed in the center and an annular juice tray 3 disposed around the burner, for example, with a hole bored in the bottom surface so that combustion air can be supplied to the gas burner 2.

4 is a cylindrical outer frame with an annular bottom plate 5 at the bottom opening;
It is removably placed on a base 1 with a gap 6 left open all around.

Reference numeral 7 denotes a cylindrical combustion chamber with the gas burner 2 facing at the center of the bottom surface, and a horizontal stepped portion 8 is bent at a position above the burner on the circumferential side, and the upper portion is bent upward along the inner surface of the outer frame 4. , and an exhaust gap 9 extending in the vertical direction is formed between this extended portion and the inner surface of the outer frame.

Reference numeral 10 denotes an exhaust communication hole bored in the stepped portion 8, which connects the combustion chamber 7.
is communicated with the exhaust interval 9 to lead out the burner exhaust gas to the exhaust interval 9.

11... are air guide holes bored at appropriate intervals on the outer circumferential portion of the bottom plate 5, through which outside air from the gap 6 is mixed into the exhaust gap 9 from below by the draft effect during burner combustion. .

Reference numeral 13 denotes a rice cooker disposed within the combustion chamber 7 and heated by the gas burner 2, and its bottom is located below the stepped portion 8.

Reference numeral 14 denotes a metal heat insulating plate whose lower horizontal side is fixed to the peripheral side of the combustion chamber 7 and has a hole facing the communication hole 10.
The upper edge flange of the rice cooker pot 13 is engaged with the upper edge flange of the rice cooker pot 13 to suspend the pot. An electric heater 16 and a heat sensitive device 17 for controlling the electric heater 16 are installed.

Reference numeral 18 denotes a heat insulating material inserted between the heat insulating plate 14 and the upper extension portion of the combustion chamber 7, in which the electric heater 16 and the heat sensitive device 17 are buried.

Reference numeral 19 denotes a cover that closes the opening between the upper part of the heat insulation plate and the upper part of the combustion chamber extension part.

Reference numeral 20 denotes an outer cover which is attached to the outer frame 1 by a hinge (not shown) and is secured to the outer frame 1 by a latch (not shown), which has a heat insulating material 21 inside and is controlled by the heat sensitive device 17. A separate electric heater 22 is installed.

Reference numeral 23 denotes an inner lid, and 24 an inner lid that is attached to the rice cooking pot 13. These inner lid and inner lid are attached to the outer lid 20 via a pressure device 25.

26 is a rice cooking thermometer that comes into contact with the bottom of the rice cooking pot 13 to detect the temperature of cooked rice; 27 is a valve that supplies gas to the gas burner 2; 28 is a valve that opens the valve 27 when the ignition is operated, and returns to its original position by the thermometer 26 when the rice is cooked. This is an operating lever that closes the valve 27 by being moved.

In this embodiment, the combustion chamber 7 and its upper extension are integrally formed, but in order to facilitate manufacturing, the respective functional parts may be fixed and integrated.

Next, the operation during rice cooking will be explained. First, the operation lever 28 causes the gas burner 2 to burn to heat the rice cooking pot 13.

At this time, each electric heater 16, 22 is in a non-energized state and does not generate heat.

The primary and secondary air for combustion for the gas burner 2 is supplied to the base 1.
It comes in from

Secondary air is supplied to the burner 2 in the combustion chamber 7.

The burner exhaust gas gathers in a space surrounded by the step part 8, the lower horizontal side of the heat insulation plate 14, and the rice cooking pot 13, descends from there through the communication hole 10, then rises, exits to the exhaust gap 9, and rises further. , are discharged from the top of the outer frame 1.

That is, the burner exhaust gas is bent at the communicating hole 10 portion.

However, the communication hole 10 is located above the burner 2;
Since the bending resistance is absorbed by the gas jetting force when gas is supplied, no burner exhaust congestion occurs.

Outside air entering from the gap 6 and the air guide holes 11 is drawn into the gap 9 by the draft effect, mixes with the burner exhaust gas, lowers the exhaust temperature, and prevents the outer frame 1 from overheating.

When the gas burner 2 stops combustion due to the end of rice cooking, each electric heater 16, 22 generates heat in response to a heat retention request to enter a heat retention state.

Since the rice cooker 13 is heated to keep it warm, the combustion chamber 7
Air enters from the base 1 into the combustion chamber 1, but due to the flow path resistance at the communication hole 10, the intruding air turns into warm air and stagnates within the combustion chamber 7, so that it does not significantly impede heat retention.

Moreover, since the gap 15 is closed at the upper edge flange of the rice cooking pot 13, outside air is not allowed to pass therethrough and the heat retention state is not deteriorated.

As described above, in the heat retention type gas rice cooker according to the present invention, the combustion air required for the gas burner may interfere with heat retention when combustion is stopped. Since the exhaust communication hole is provided, it is possible to suppress the flow of air when combustion is stopped, and it is possible to improve the heat retention state.

Furthermore, since the communication hole is provided above the burner, the burner can be exhausted smoothly during burner combustion.

Furthermore, since the exhaust gas space is provided in the vertical direction so as to communicate with the outside of the combustion chamber through the communication hole, a draft effect can be sufficiently exerted during burner combustion, and combustion air can be introduced smoothly.

In addition, the outside air intake hole is connected to the bottom of the exhaust gap, so
During burner combustion, outside air is mixed into the burner exhaust due to the draft effect, which lowers the exhaust temperature and prevents the exterior portion from overheating.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the heat-retaining gas rice cooker according to the present invention, Figure 2
The figure is an enlarged sectional view of the main part, and FIG. 3 is a perspective view of the main part with the outer frame removed from the base. 2...Gas burner, 4...Outer frame, 7.
... Combustion chamber, 8 ... Stepped section, 9 ...
・Exhaust interval, 10...Communication hole, 11...
・Air guide hole, 13...Rice pot, 14...
Heat insulation board, 16...Electric heater.

Claims (4)

[Scope of utility model registration request] (1) A rice cooker is disposed in a substantially cylindrical combustion chamber of a gas burner to which external air for combustion is supplied, and a heat insulator using an electric heater is disposed around the circumferential side of the rice cooker. In addition to forming a bent horizontal step on the peripheral side of the combustion chamber,
This heat-retaining gas rice cooker is characterized in that this stepped portion is provided with an exhaust communication hole for discharging burner exhaust outdoors. (2) The heat-retaining gas rice cooker according to claim 1, wherein the communication hole is located above the gas burner. (3) The heat insulation according to claim 1 of the utility model registration claim, characterized in that an exhaust interval extending vertically is formed outside the combustion chamber, and this exhaust interval is communicated with the combustion chamber through a communication hole. Type gas rice cooker. (4) The thermal gas rice cooker according to claim 3, which is a registered utility model, characterized in that an air guide hole for external air is communicated with the lower part of the exhaust interval.