JPH0763430B2 - Spiral heating machine - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spiral type heating device, and more particularly to a spiral heating device suitable for continuous baking while transferring a large number of objects to be baked, such as pizza pies. The present invention relates to a spiral type heating machine.

2. Description of the Related Art As a spiral heating device of this type, for example,
59-33291 gazette (utility model registration No. 1591178) and Japanese Patent Publication Sho
There is one disclosed in Japanese Patent Publication No. 51-5055. First, the pizza oven disclosed in Japanese Utility Model Publication No. 59-33291 has a guide member that extends in a spiral shape in the vertical direction of the heating chamber and guides the transfer of a raw pizza pie that is an object to be heated. With the electric heater arranged in the lower part of the heating chamber and the electric heater arranged along the spiral guide member, the raw pizza pie transferred along the guide member is heated and continuously baked. It is a thing. The oven disclosed in Japanese Patent Publication No. 51-5055 also includes a guide member that extends in a spiral shape in the vertical direction of the heating chamber and guides the transfer of raw pizza pie that is the object to be heated. This is an electric heater arranged along a spiral guide member so that a raw pizza pie transferred along the guide member is heated and continuously baked.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the conventional spiral heating machine as described above,
The object to be heated is heated by the red heat of the electric heating wire,
Since the heat generated is due to heating by natural convection and infrared radiation, it takes a long time to bake raw foods, etc.
When food is continuously added, all foods cannot be baked completely uniformly, uneven baking and insufficient heating often occur, and it is difficult to properly baked the inside and outside of some foods. In some cases. For example, moist raw foods should be treated with 300% to shape themselves.
It is heated to a surface temperature of ° F and it is necessary to remove enough water to make the surface crispy. To quickly turn to a fox, it needs to be heated to about 350 ° F, and to burn it, it needs to be heated to about 400 ° F or more. However, in these conventional ovens,
Since it is not possible to heat the food under constant conditions, it is necessary to adjust the time between feeding the food and adjust the baking time each time.Therefore, the ability is limited and the baking condition is constant. I couldn't get it.

It is an object of the present invention to provide a spiral type heater that can solve the above-mentioned conventional problems.

Means for Solving the Problems A spiral type heater according to the present invention has an inlet for an object to be heated in an upper part and an outlet for an object to be heated in a lower part, and defines a substantially cylindrical heating chamber therein. A housing, a heat source chamber provided above the heating chamber of the housing and in which a heat source is disposed, and a hot air duct that communicates with the heat source chamber and extends downward along substantially the central axis of the heating chamber. A guide means spirally extending around the hot air duct from the inlet to the outlet in the heating chamber, and the object to be heated is transferred from the inlet to the outlet along the guide means For feeding the object to be heated, a plurality of hot air jetting means consisting of a multi-hole jet nozzle communicating with the hot air duct and extending toward the guide means, and the air heated in the heat source chamber A hot air circulating means for heating the object to be heated after vertically injecting it from the multi-hole jet nozzle of the hot air jet means toward the guide means through the hot air duct, and collecting the blown heat to the heat source chamber. And is provided.

EXAMPLES Next, the present invention will be described in more detail with reference to the accompanying drawings with reference to the examples of the present invention.

FIG. 1 is a schematic perspective view showing an entire spiral type heating machine as an embodiment of the present invention, and FIG. 2 is a schematic vertical sectional view thereof. As shown in FIGS. 1 and 2, the spiral heater of this embodiment includes a cylindrical housing 10 that defines a cylindrical heating chamber 10A therein. A loading port 11 for loading a dish 1 on which an object to be heated such as a pizza pie is placed is provided, and an outlet 12 for taking out the dish 1 is provided at the lower part.
Is provided. Further, on the outer peripheral surface of the housing 10, a plate 1 on which a raw pizza pie or the like is placed is introduced into the input port 11 and a plate on which the pizza pie or the like baked in the heating chamber 10A is placed. An outlet chute 14 for pulling 1 out of the outlet 12 is mounted. The insertion port shooter 13 and the ejection port shooter 14 have slide rails 13A and 1A for facilitating the movement of the tray 1, respectively.
4A is provided.

In addition, between the charging port shooter 13 and the charging port 11, the plate 1 is continuously charged from the charging port shooter 13 through the charging port 11 into the heating chamber 10A without being sequentially clogged. A suitable charging mechanism section 15 may be provided.
Further, as shown in the sectional view of FIG. 2, a suitable heat insulating material 16 is attached to the inner circumference of the housing 10.

A heat source chamber 20 is provided above the heating chamber 10A of the housing 10. The lower surface of the heat source chamber 20 has a large number of openings 27A.
It is defined by a suction gallery 27 consisting of a punching plate with (see FIG. 4). An electric heater 24 is arranged in the heat source chamber 20 in this embodiment. Furthermore, a cylindrical hot air duct 21 is arranged which communicates with the inside of the heat source chamber 20 through the central portion of the suction gallery 27 and extends downward along the central axis of the heating chamber 10A. Furthermore, in the heating chamber 10A, it is supported by a guide rail fixing arm 31 (see FIG. 3) attached to the outer peripheral surface of the hot air duct 21, and from the inlet 11 to the outlet 12 around the hot air duct 21. A guide rail 30 extending in a spiral shape is arranged.

Further, in the heating chamber 10A, a plurality of plate feeds for rotating the plate 1 around the guide rail 30 and transferring the plate 1 on which the object to be heated is placed along the guide rail 30 as described later. A shaft 40 is provided. As shown in the cross-sectional view of FIG. 2, the lower ends of the dish feed shafts 40 are supported by a shaft base with bearings 43 arranged at the bottom of the housing 10 and are rotated by a gear motor 42. It is attached and fixed around, and the upper end is attached and fixed to a fixing ring 40A (see FIG. 5). Therefore, the plate feed shaft 40 is rotated around the guide rail 30 as the rotary shaft 41 is rotated by the gear motor 42.

On the outer periphery of the hot air duct 21, there are a hot air blowing downward finger 22 and a hot air blowing upward finger 23 which communicate with the hot air duct 21 and spirally extend at a constant interval so as to sandwich the upper and lower sides of the guide rail 30. It is installed. The hot-air blowing upward finger 23 is provided with a large number of blowing nozzles 23A (see FIG. 4) for injecting hot air to the lower side of the guide rail 30. Similarly, the hot-air blowing downward finger 22 also has A large number of blowing nozzles similar to the blowing nozzle 23A for ejecting hot air to the upper side of the guide rail 30 are provided.

Further, a fan 26 driven by a fan motor 25 is arranged in the center of the heat source chamber 20. This fan
When the fan motor 25 rotates and drives the air in the heat source chamber 20 that is heated by the electric heater 24, the hot air blowing downward finger 22 and the hot air blowing upward finger 23 pass through the hot air duct 21 as described later.
The hot air is blown from the blow-out nozzles to the upper and lower sides of the guide rail 30 and the used hot air is collected into the heat source chamber 20 through the large number of openings 27A of the suction gallery 27.

Next, details of the structure of the spiral type heater as one embodiment of the present invention as described above will be described.

First, FIG. 3 shows a guide rail arranged in the housing 10 of the spiral heating machine shown in FIGS. 1 and 2.
The detailed structure of only 30 is shown. This third
As shown in the figure, the guide rail 30 is composed of two rails that extend in a spiral shape in parallel with each other, and each rail is heated by a guide rail fixing arm 31 attached to the outer peripheral surface of the hot air duct 21. Hot air blowing downward fingers 22 spirally extending around the duct 21
And the hot air blowing upward fingers 23 are supported so as to extend at a constant distance from them. The guide rail 30 receives an object to be heated from the inlet chute 13 through the inlet 11, and the hot air duct.
A certain descending slope is provided so that it can be lowered around 21 and between the hot air blowing downward finger 22 and the hot air blowing upward finger 23 and sent out from the outlet 12 to the outlet shooter 14.

FIG. 4 is a diagram for explaining in detail only the state of circulation of hot air in the spiral type heater shown in FIGS. 1 and 2. In the heat source chamber 20 above the housing 10,
The air heated by the electric heater 24 is blown by the fan 26 from the heat source chamber 20 into the hot air duct 21 as shown by arrows C and D. The hot air blown into the hot air duct 21 is sent to the hot air blowing downward fingers 22 and the hot air blowing upward fingers 23 as shown by an arrow E. Then, as shown by the arrow F, the hot air is further jetted from the blowing nozzles 23A to the upper and lower sides of the guide rail 30 at high speed. Each of the blowing nozzles 23A is arranged so that the guide rails 30 are opposed to each other in the vertical direction, so that when a heated object (pizza pie or the like) slides on the guide rails 30, the blowing nozzles are provided on the upper surface and the lower surface thereof. Hot air from 23A is jetted to heat those objects to be heated. The hot air after heating the object to be heated in this way is drawn toward the heat source chamber 20 by the action of the fan 26, as shown by the arrow G, and passes through the large number of openings 27A of the suction gallery 27 so as to pass through the heat source chamber. It is collected in the inside of 20, and is reheated by the electric heater 24, and is blown into the hot air duct 21 again by the fan 26.

FIG. 5 shows a detailed structure of only the relationship between the guide rail 30 and the plate feed shaft 40 arranged in the housing 10 of the spiral heating machine shown in FIGS. 1 and 2. As well shown in FIG. 5, the dish feed shaft 40 is installed at a constant distance from the outer circumference of the guide rail 30 and rotates around it so that the object to be heated on the guide rail 30 is transferred to the hot air duct 21. Slide on the guide rail 30 while rotating with the outer circumference of the plate, as shown in the general view of FIG. 1, as shown in the general view of FIG. 1 is indicated by an arrow shown on the plate 1 as the plate feed shaft 40 rotates by engagement of one of the plate feed shafts 40 with an edge portion protruding from the outer periphery of the guide rail 30. The guide rail 30 is slid downward while rotating on the guide rail 30. Thus, the plate feed shaft 40 transfers the plate 1 to the take-out shooter 14 at a speed suitable for baking the object to be heated placed on the plate 1 as the rotary shaft 41 is rotated by the gear motor 42. . At this time, by matching the rotation of the plate 1 and the feeding transfer, the hot air from the blowing nozzle 23A hits the object to be heated evenly, and good baking without uneven baking can be achieved.

The embodiment described above with reference to FIGS. 1 to 5 is the heat source chamber.
An electric heater 24 was arranged as a heat source in 20.
The present invention is not limited to this. For example, as schematically shown in FIG. 6, a gas burner 240 is arranged in the heat source chamber 200, fuel such as city gas or propane gas is burned in the heat source chamber 200, and hot air generated by the combustion is generated. fan
At 26, the return air may be blown into the hot air duct 21 and the return air may be recirculated as indicated by arrow H. Since other configurations and operations are the same as those of the embodiment shown in FIGS. 1 to 5, only corresponding components are designated by the same reference numerals and will not be described in detail again.

Further, in the above-described embodiment, the spiral heating device of the present invention is described as a cooking ware for cooking such as baking of food such as pizza pie, but the present invention is not limited to this. It is also applicable as a heating machine such as a thawing machine and a drying machine.

EFFECTS OF THE INVENTION The spiral heater of the present invention exhibits the following effects.

That is, according to the present invention, the object to be heated is configured to be continuously heated while being descended and transferred in a spiral shape. In addition to being able to make the entire heater extremely compact, it also uses a plurality of spaced hot air jets that send hot air heated by a heat source such as an electric heater or gas burner to the surface of the object to be heated. As a result, conventional natural convection heating and radiant heating do not provide sufficient heating when the heated food overlaps the upper guide rail and the lower guide rail, and therefore the plate feed shaft transfers two plates up and down. In many cases, the number of plates to be transferred per plate feed shaft was limited to one so that they would not compete with each other. However, in the present invention in which the jet heat transfer from the multi-hole jet nozzle is adopted. Since the hot air is sprayed uniformly on each food dish, the desired heating can be completed continuously in a very short time without considering the competition of the dishes and the time interval of feeding as described above. it can. When using the spiral heating machine of the present invention, for example, as a baking machine for food such as pizza pie, the inside of the food is improperly dried by hot air blown against the surface of the food by hot air blowing means. The surface can be crispy, foxed, or burnt without causing the baking time to be shortened, and the rotation of the food by the plate feeding mechanism is expected to result in even baking. it can.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing the whole of a spiral type heating machine as an embodiment of the present invention, FIG. 2 is a schematic vertical sectional view of the spiral type heating machine of FIG. 1, and FIG. FIG. 4 is a diagram showing the detailed structure of only the guide rail arranged in the housing of the spiral heating machine shown in FIGS. 1 and 2, and FIG. 4 is the spiral heating shown in FIGS. 1 and 2. FIG. 5 is a view for explaining only the state of circulation of hot air in the machine in detail, and FIG. 5 shows a guide rail and a plate feed shaft arranged in the housing of the spiral heating machine shown in FIGS. 1 and 2. FIG. 6 is a schematic view showing the detailed structure of only the relationship of the above, and FIG. 6 is a schematic view showing a spiral heating machine of another embodiment of the present invention. 1 ... Plate, 10 ... Housing, 10A ... Heating chamber, 11 ... Inlet, 12 ... Outlet, 13 ... Inlet shooter, 14 ... Outlet shooter, 20 ... Heat source chamber, 21 ... … Hot air duct, 22 …… Hot air blow down finger, 23 …… Hot air blow up finger, 23A …… Blowout nozzle, 24 …… Electric heater, 25 …… Fan motor, 26 …… Fan, 27 …… Suction gallery, 27A ...... Aperture, 30 ...... guide rail, 31 …… guide rail fixed arm, 40 …… plate feed shaft, 40A …… fixing ring, 41 …… rotating shaft, 42 …… gear motor, 43 …… bearing shaft base .

Claims (1)

[Claims] 1. A housing having an inlet for an object to be heated in an upper portion and an outlet for the object to be heated in a lower portion and defining a substantially cylindrical heating chamber therein, and above the heating chamber of the housing. A heat source chamber in which a heat source is disposed, a hot air duct communicating with the heat source chamber and extending downward along substantially the central axis of the heating chamber, and from the inlet to the outlet in the heating chamber. And a guide means extending spirally around the hot air duct, a heated object feeding means for transferring the heated object from the inlet to the outlet along the guide means, and the hot air A plurality of hot air jetting means, each of which consists of a multi-hole jet nozzle communicating with a duct and extending toward the guide means, and air heated in the heat source chamber is passed from the hot air ducts to the gas from the hot air jetting means. Spiral heater, characterized in that it comprises a hot air circulation means so as to recover to the heat source chamber after being injected towards the de means.