JPS5856056B2 - Cooking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooking device for cooking food, and provides a cooking device that can use liquid fuel such as kerosene.

The present invention will be explained below based on illustrated embodiments.

1 is an outer case, 2 is a heating box housed inside this case via a heat insulating material 4, and 3 is a heating box that is divided into two upper and lower chambers.
A partition plate is fixed to the heating box 2, with the upper side serving as the heating chamber 12 and the lower side serving as the combustion device storage chamber 13.

Reference numeral 5 denotes an air inflow hole formed by penetrating the bottom wall of the outer case 1 and the heating box 2, and communicates the outside air with the storage chamber 13.

6 is a plurality of legs fixed to the outer bottom of the outer case 1, and I is an exhaust window formed in the upper side wall of the heating box, which communicates the inside of the heating box with the outside air.

Reference numeral 8 denotes a cooking box housed and installed in the heating chamber 12, and has a conical lower part and an open upper surface so that the inside serves as a heating chamber 14 for cooking.

Reference numeral 9 designates a plurality of pairs of shelf boards provided on opposing inner walls of the cooking box, and reference numeral 10 designates cooking plates that can be taken in and out at will and placed on the shelf boards by sliding from the opening/closing door (not shown) side.

Thus, a space 11 is provided between the outer peripheral wall of the cooking box 8 and the inner peripheral wall of the heating box 2.

1γ is a fuel tank installed outdoors or indoors and filled with liquid fuel such as kerosene, and 18 is a constant liquid level that communicates with this tank via a fuel supply pipe 1γA and keeps the internal liquid level constant at all times. It is stored in container storage room B.

Reference numeral 19 denotes a blower provided in the storage chamber B, the intake side of which is connected to the air inflow hole 5, and the exhaust side connected to a blower duct 20.

A combustor 21 is composed of main parts of a burner body 22, a heat shield casing 23, and a nozzle body 24.

As shown in FIG. 2, the burner body 22 consists of a circular m-shaped burner housing 25 with an open upper surface and a burner head 26 that is detachably placed on the upper surface of the burner housing.

The inside of the burner housing 25 is an inverted truncated conical vaporization chamber 2γ.

The burner head 26 has a circular planar shape and a dish-shaped cross section, and has a large number of burner ports 29 formed by integrally molding comb teeth 28 on the peripheral surface.

That is, this burner head has a completely closed surface 30 from the center to the periphery, and its outer bottom surface has a spherical shape 31 with a concave cross section from the center to the periphery.

32 is a comb tooth-shaped piece 28 directed at equally spaced positions on the circumference.
A plurality of cylindrical projecting pieces protruding from the inner part of the lower surface provide a rotation prevention effect by fitting into a groove recessed inside the upper peripheral edge of the burner housing 25.

Therefore, in the fitted state between the protruding piece and the groove, a small gap g is created between the lower surface of the comb tooth-shaped piece 28 and the upper end surface of the burner housing 25, which is located inside the burner head 26. The dimensions of the protruding piece 32 and the groove are set so that a small gap G is formed between the outer circumferential surface and the upper inner circumferential surface of the burner housing 25.

At this time, the rising wall formed at the innermost part of the comb tooth-like piece 2B of the burner head 26, that is, the inner outer circumferential surface 33 has an outer circumferential diameter smaller than the upper inner circumferential diameter of the burner casing 25, and The surface is forced to wrap.

34 is a diaphragm plate installed in the upper part of the vaporization chamber 2T to partition the vaporization chamber into two upper and lower chambers, and has an annular outer peripheral edge 35 rising upward and an annular outer peripheral edge 35 extending inward from this outer peripheral edge. It consists of a doughnut-shaped horizontal portion 36, a truncated conical portion 31 curved upward from the horizontal portion, and an aperture opening 38 with the top R of the truncated conical portion open.

The lower edge of the outer circumferential edge 35 of this aperture plate is detachably engaged with a step 40 formed on the vaporization wall 39 constituting the inner circumferential surface of the vaporization chamber.

By press-forming the aperture plate into a substantially conical shape from metal of equal thickness, the main vaporization chamber A below the aperture plate is gradually narrowed upward in the center thereof, and the sub-vaporization chamber A above the aperture plate is The chamber B is provided with a space that gradually expands from the center toward the circumferential direction.

R is a concave curved part formed on the inner periphery of the bottom wall 41 of the vaporization chamber 2γ, and 42 is an internal part that extends below the bottom wall 41 of the burner housing 25 and has an open bottom surface. Part 43 is a heating element device inserted into this hakama part and bonded to the outer surface of the bottom wall 41, which includes a positive temperature coefficient thermistor 44, a terminal plate 45 bonded above and below this thermistor, and an insulator bonded to the outside of this terminal plate. It is composed of a plate 46.

4γ is the lower surface of the heating element device 43, that is, the lower insulating plate 46
An elastic body such as a disc spring is joined to the outer surface of the elastic body, and 48 is a holding plate inserted into the hakama part 42 from the outer surface of this elastic body. It is pressed against the wall 41.

Reference numeral 49 denotes a caulking portion that firmly fixes the holding plate by pressing the lower end of the hakama portion 42 toward the holding plate 48 side.

A fixing screw 50 is inserted into the center of the bottom wall of the heat shielding box 23 from the outside.
penetrates through it, and its threaded portion is screwed into the female threaded portion formed on the opposing retaining plate 48 to connect the heat shielding housing 23 and the burner housing 25.
are fixed together.

On the other hand, on the outer wall surface of the burner casing 25 extending above the heat shielding casing 23, vertical ribs 51 are integrally formed at multiple locations and protrude. Housing 2
When the fixing screw 50 is screwed in, the hook 52 and the shoulder 53 abut against each other, and the two pipes 23 and 25 are connected.

The periphery of the open upper surface of the heat insulating housing 23 is further folded outward and downward to form the above-mentioned shoulder portion 53, and extends horizontally from the end of this folded section to form an annular flange portion 54. ing.

Reference numeral 56 denotes a mounting portion formed by pushing upwardly a plurality of portions of the flange portion, and a mounting hole 56 is bored in the center of the mounting portion.

This flange portion 54 is in contact with the partition plate 3, and at the same time, the shoulder portion 53 of the heat shielding case 23, the upper part of the burner case 25, and the burner head 26 protrude into the outer pot 2, and the flame port 29 portion is connected to the inner pot 4. It is exposed on the corresponding part of the outer sole.

In this state, by passing the tapping screw 5γ through the partition plate 3 and screwing it into the mounting hole 56 of the flange portion 54, the heat shielding case 23 is fixed to the partition plate 3, and thereby the burner body 22 is fixed and held. be done.

24 is a nozzle body provided in the storage chamber 13, one end of which is connected to the burner housing 25, and is constructed as follows.

That is, 58 is a nozzle head that is screwed through and fixed to the lower side wall of the burner housing 25 and has its tip facing the vaporizing section.
A through venturi hole 59 is formed in the central portion, the diameter of which gradually narrows toward the tip.

Reference numeral 60 denotes a guide cylinder made of a thin metal plate that is fixedly connected to the outer circumferential wall of the rear end of the nozzle head 58, and has a substantially cone-like shape whose diameter narrows toward the nozzle head 58.

Reference numeral 61 denotes a connecting pipe whose one end is fitted into the guide tube 60 and fixed with adhesive, and is made of a heat insulating material such as phenol 1tJfJW.

Reference numeral 62 denotes a guide pipe whose one end is fitted to the outer circumference of the other end of the connecting pipe 61 and fixed with adhesive or the like, and the air blowing tact 2 is attached to the other end.
0 ends are connected.

Reference numeral 63 denotes an introduction tube that projects integrally with the outer wall of this guide tube, and the end of the liquid supply vibro 4 led out from the electrolyte circuit 18 is screwed onto it.

Reference numeral 65 is a small-diameter liquid sending pipe that is formed integrally with the introduction section 63, projects vertically to the internal axis of the guide tube 62, and is bent along the axis in the direction of the nozzle head 68, and is hollow inside. It communicates with the liquid supply vibro 4 via the introduction node 63 .

A needle nozzle 66 extends from the tip of the liquid-feeding vibro 5, passes through the center of the venturi hole 59 of the nozzle head 68, and has its tip opened into the vaporization chamber 2γ. It has a hollow hole and communicates with the liquid sending pipe.

The tip of this needle nozzle is cut diagonally,
This tip position is located at the venturi hole 69 of the nozzle head 59.
faces the vicinity of the opening into the vaporization chamber 2γ.

6γ is a static ball pipe which is led out from the side wall of the air duct 20, and whose tip is communicated with the liquid level regulator 18 to apply a blower to the liquid level.

When the above configuration is clicked and the positive temperature coefficient thermistor 44 is energized in advance, the burner housing 25 is heated by the heat generated.
The vaporization wall 39 is heated by hot immersion, and the temperature of the vaporization wall surface is kept constant due to the characteristics of the thermistor.

Next, when the blower 19 is operated, the blower 19 is connected to the air duct 20.
, guide tube 62, connecting tube 61. The air passes through the guide portion 60 and reaches a venturi hole 59, and is blown into the vaporization chamber 21 as a high-speed air flow due to the venturi action of the venturi hole.

At this time, since the moka in the iron part becomes small due to the venturi action, the liquid level device 18 is moved from the tip of the needle nozzle 66
The fuel from the static vibro γ is sucked in, and the static air pressure from the static vibro γ acts on the constant liquid level device to push out the fuel, which is injected into the vaporization chamber 21 as particulates together with the high-speed air flow.
It collides with the vaporization wall 39 at extremely high speed.

The collided fuel particles fall onto the vaporization wall 25 and are heated and vaporized, forming a precipitated aeration of molecular fuel and air, mixed with gas and liquid, rising, and reaching the aperture plate 34 where they are condensed. and is ejected from the aperture 38.

The aiki of this device is diffused, and is further placed on a gas-liquid table and reaches the flame port 29 through a small gap G.2. If the fuel is ignited by an appropriate ignition means, it will burn continuously.

Fuel is supplied by the air flow supplied to the nozzle head 59 in accordance with so-called Bernoulli's law, so when changing the combustion amount, the control valve is used to change the combustion amount since the air flow rate and the fuel flow rate are approximately proportional. You can easily change the fuel flow rate by simply changing the air flow rate.

This provides the characteristic that the premix ratio of air and fuel remains approximately constant even if the combustion amount is changed.

The fuel collided with the vaporization wall 39 is spread thinly on the vaporization wall soil, and the entire fuel particle is rapidly heated and vaporized by the heat of the vaporization wall 39, and the air jet forms a dog with a very high velocity gradient above the fuel particle. In order to form a flow, not only the fuel particles are spread thinner, but also the fuel molecules are rapidly carried away, and the fuel diffusion layer formed on the vaporization wall 39 becomes extremely thin.

Since the vaporization wall 39 becomes wider as it goes upward, the diameter of the vaporization chamber 2γ is gradually increased from the bottom diameter to the top diameter, so that the fuel molecules are moved along the sloped vaporization wall surface by the air flow. It is biased upward and helps in effectively forming the diffusion layer.

The concave curved surface R of the inner bottom periphery of the vaporization chamber 2γ also has the effect of spreading the fuel particles thinly and facilitating vaporization, as described above.
Fuel is prevented from accumulating and solidifying on the inner bottom periphery.

On the other hand, the vaporized fuel molecules ejected from the throttle port 38 into the sub-vaporization chamber B collide with the spherical surface 31 that spreads from directly above the throttle port 38 toward the small gap G, and are uniformly diffused radially from the center to the flame port 29. This results in a uniform and stable combustion flame.

A small gap g is provided between the lower surface of the comb tooth-shaped piece 28 and the upper end surface of the burner housing 25, and each flame port 29 is communicated with the entire circumference by this small gap, so that ignition by the ignition means is possible. At the end of the burn, the vaporized fuel molecules from all the flame openings are ignited, which means that the so-called fire transfer is extremely good.

The combustion hot air is released into the space 11, rises through the space 11 while heating the bottom wall and outer wall of the cooking box 8, further heats the food placed on the cooking plate 10, and then passes through the exhaust window. Exhausted from γ.

That is, the hot combustion air heats the cooking box 8 so as to surround it, and the food to be cooked on the cooking plate 10 is immediately heated from its upper surface and inside the cooking heating chamber 14, and the cooking is completed after a predetermined period of time.

However, if the blower 19 is linked to a cooking timer or a heat sensitive device, the blower will stop operating when cooking is complete, cut off the air blowing to the venturi hole 59 of the nozzle head 58, and close the needle nozzle 66. It is possible to cut off fuel suction from the engine and automatically stop combustion.

In addition, a mechanism is provided to reduce the amount of combustion by releasing a part of the air to reduce the amount of air blown to the venturi hole 69, and by linking this air release to the temperature regulator, it is possible to Various types of cooking are possible depending on the amount of combustion.

Such a change in the amount of combustion is due to the combustion method of this invention in which the fuel flow rate can be easily changed proportionally by simply changing the air flow rate as described above. Due to the characteristic that the premix ratio with
It is possible to always achieve near complete combustion.

Therefore, the present invention can be implemented in an open or microwave oven.

One embodiment of the present invention has been described above, but in short, the present invention resides in a combustion type cooker, in which a combustor that heats the heating chamber is provided with a vaporization chamber surrounded by a preheated vaporization wall, and The liquid fuel is injected into this vaporization chamber using high-speed airflow, and is combusted after being vaporized. Therefore, it is possible to use kerosene fuel, reducing fuel costs. Also, unlike gas, there is no danger of explosion, and since the amount of fuel is supplied in proportion to the amount of air, complete combustion is always achieved even when the combustion amount is changed, and there is almost no generation of gases such as carbon oxide. It has the characteristics of

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional side view of essential parts showing one embodiment of the present invention;
FIG. 2 is an enlarged cutaway sectional view of the combustor portion. In the figure, 2 is a heating box, 7 is an exhaust window, 8 is a cooking box, 10 is a cooking plate, 12 and 14 are heating chambers, 19 is a blower, 21 is a combustor, 22 is a burner body, 24 is a nozzle body, and 2γ is a In the vaporization chamber, 29 is a flame port, and 39 is a vaporization wall.

Claims (1)

[Claims] 1 A power chamber in which a cooking plate is stored in a manner that can be taken out and put in freely, a combustor that heats this heating chamber with its combustion heat, and an exhaust window that discharges hot air after heating the heating chamber, and the combustor is heated in advance. The liquid fuel is injected into the vaporization chamber by a high-speed air flow to mix gas and liquid, vaporize it, and then burn it at a flame port above the vaporization chamber. A cooker featuring: