JPH09117376A - Smokeless roaster - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure freedom degree of an installation position of an ultraviolet ray sensor and eliminate malfunction of an electronic circuit for processing a signal from the ultraviolet ray sensor in a smokeless roaster. SOLUTION: A smokeless roaster is provided with an outer pot 16 fitted in a table 10, an inner pot 26 locked in the outer pot 16, and a water tank 36 locked in the inner pot 26. Transmit holes 56, 58, 60 are bored in respective side walls 4, 5, 6 of the water tank 36, the inner pot 26 and the outer pot 16, and ultraviolet rays 52 from a heating part are taken out outside of the outer pot 16 via these transmit holes 56, 58, 60. A reflection plate 54 is provided on an optical path of the ultraviolet rays 52 and the ultraviolet rays 52 reflected from the reflection plate 54 is sensed by an ultraviolet sensor 62. The angle of the reflection plate 54 is made changeable so that freedom degree of the installation position of the ultraviolet sensor 62 is secured. A board of an electronic circuit for processing an electric signal from the ultraviolet sensor 62 is installed under the table 10 with its bottom up so as to prevent dust and water content from sticking to the board.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a smokeless roaster, and more particularly to a smokeless roaster with a safety device for stopping the supply of fuel gas to the burner when the burner flame is extinguished.

[0002]

2. Description of the Related Art Smoke is generated from a roaster when roasting meat or barbecue in a roaster in a restaurant or hotel, so that a so-called smokeless roaster that can exhaust the smoke to the outside is used. This smokeless roaster has a structure as shown in FIG. That is, a circular mounting hole 12 is transparently provided in the center of a table 10 fixed on a casing-shaped base (not shown), and an outer pot 16 having a substantially funnel shape is fitted into the mounting hole 12. ing. A bottomed cylindrical inner pot 26 having a smaller diameter is locked in the outer pot 16 and a burner 32 is installed on the bottom portion 1.

Further, at the center of the bottom of the inner pot 26, there is provided a burner exposing cylinder 44 which allows the heat generating portion 2 of the burner 32 to penetrate and project upward, and water 37 is provided outside the burner exposing cylinder 44. A water tank 36 capable of storing water is locked. A restor 38 is placed on the water tank 36. The upper end of the outer pot 16 and the inner pot 26
Is closed by an annular suction cover 22 having an inverted U-shaped radial cross section, and an annular smoke exhaust passage 30 formed between the outer pot 16 and the inner pot 26. And the space above the rostrum 38 communicates with each other through a plurality of suction holes 48 formed through the inner wall 46 of the suction cover 22.

When meat and vegetables are roasted using the smokeless roaster having the above structure, when they are placed on the roast 38 and ignite the heat generating portion 2 of the burner 32, the meat and the like are roasted and smoke is generated. However, since the inside of the outer pot 16 is depressurized by the smoke exhausting means (not shown) installed outside the outer pot 16, the smoke is sucked into the suction hole 48 of the suction cover 22, the smoke exhaust passage 30 and the outer pot 16 described above. Smoke duct 1 communicating with
8 and the smoke exhausting means to be exhausted to the outside.

[0005]

The smokeless roaster is
When burning meat etc., it has the effect of suppressing indoor pollution due to smoke, but since the burner is used as the combustion means, as with other combustion means, when the flame of the heat generating part of the burner extinguishes , It is necessary to take measures to stop the fuel supply to the burner by sensing the disappearance.

However, if a smoke extinguishing roaster having the above structure is to be fitted with a conventionally known flame extinction sensing device,
There are the following problems: (1) When the meat is roasted using the smokeless roaster, components such as the roast, the suction cover, the burner, and the inner pot become dirty, so it is necessary to remove them from the outer pot and clean them. Therefore, the flame extinction sensing device cannot be directly attached to the component.

(2) Therefore, as a non-contact type sensing device for the above-mentioned components, the burner flame is emitted to the ultraviolet sensor provided at the outer position of the outer pot through the through holes in the side walls of the inner pot and the outer pot. A method of detecting ultraviolet rays is conceivable, but this method has a problem that the ultraviolet ray sensor must be installed only on the straight optical path of ultraviolet rays. In the smokeless roaster, various components necessary for the operation of the smokeless roaster such as a fuel gas supply pipe for the burner, a pilot fire supply means, and a sensor for detecting the temperature inside the outer kettle are provided outside the outer kettle. It is difficult to secure a space for mounting the ultraviolet sensor on the line due to the presence of these elements, and even if the space is secured, there is almost no degree of freedom.

(3) Further, a base of an electronic circuit for processing an electric signal from the ultraviolet sensor is provided outside the outer pot, but the base is provided in the smokeless roaster having the above structure. If it is provided without specially devising the location and the installation method, there is a risk that dust and water will adhere to the base and upset the electronic circuit. Therefore, the present inventor has made various studies to solve the above-mentioned problems, and if a light reflecting means is provided on the optical path and the base is installed in a specific position in a specific state, the installation location of the ultraviolet sensor can be improved. The present invention has been completed by finding the fact that a great degree of freedom can be ensured and a malfunction of an electronic circuit that processes a signal from an ultraviolet sensor can be suppressed.

[0009]

In order to solve the above-mentioned problems, the invention according to claim 1 locks an inner hook for supporting a burner in an outer hook fitted in a table, and In a smokeless roaster in which a water tank having a burner exposing cylinder capable of protruding the burner heating portion in the central portion is locked to the inner pot, a side wall of each of the water tank, the inner pot and the outer pot is provided. Through holes are provided, and ultraviolet rays from the heat generating portion are taken out to the outside of the outer pot through the through holes, and a reflection plate that reflects the ultraviolet rays is provided outside the outer pot and below the table. Then, the means for causing the ultraviolet ray sensor to detect the ultraviolet ray from the reflector is adopted.

In addition to the above-mentioned means, the invention according to claim 2 further comprises a base of an electronic circuit for processing an electric signal from the sensing portion of the ultraviolet sensor, which is directed downward with respect to a supporting frame for supporting the table. Moreover, a means of fixing the table independently of the table is adopted.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment in which the inventions of claims 1 and 2 are embodied at the same time will be described with reference to FIGS. The structure of the smokeless roaster according to the present invention is basically similar to that of the prior art. That is, as shown in FIG. 1, an outer hook 16 is fitted into a mounting hole 12 of a table 10 fixed to a base (not shown), and an inner hook 26 is inserted into the outer hook 16 by a locking member 28. While being locked, the burner 3 is attached to the bottom portion 1 of the inner hook 26.
2 are installed.

A water tank 36 having a frustoconical burner exposing cylinder 44 at its center is locked to a locking portion 42 projecting in a ring shape inside the inner pot 26. Water 37 for floating the gravy is stored on the outside of the exposed cylinder 44.

A ring-shaped engaging portion 24 is provided inside the upper end of the outer pot 16, and the suction cover 22 engaged with the engaging portion 24 has an upper end of the outer pot 16 and an upper end of the inner pot 26. And the space above the rostrut 38 mounted on the water tank 36 and the annular smoke exhaust passage 30 formed between the outer kettle 16 and the inner kettle 26.
The second inner wall 46 communicates with each other through a suction hole 48 that is transparently provided.

Further, in the smokeless roaster according to the present invention, the light is provided at a position above the heat generating portion 2 of the burner 32 on the side wall 4 of the outer pot 16, the side wall 5 of the inner pot 26 and the side wall 6 of the water tank 36. Through hole 5 large enough to pass through
6, 58 and 60 are provided respectively, and the burner 32
It is possible to take out the ultraviolet rays 52 generated by the flame of the heat generating section 2 to the outside of the outer pot 16.

As shown in FIG. 2, a pair of support frames 8 extending parallel to the longitudinal direction are fixed to the upper end of the casing-shaped base 7 supporting the table 10, and 1 is provided between the support frames 8. The supporting plates 9 are fixed with screws. On the rear surface side of the support plate 9, one reflecting plate 54 is supported by two supporting members 67 extending downward in parallel and vertically in the optical path of the ultraviolet rays, and reflected by the reflecting plate 54. An ultraviolet sensor 62 for detecting ultraviolet rays is attached to the support plate 9 independently of the reflector 54. Here, “independent” means that if the installation position of the reflector 54 is determined, the ultraviolet sensor 62
Does not necessarily mean that the installation position of the ultraviolet sensor 62 is changed, and the ultraviolet sensor 62 is changed by changing the installation angle of the reflection plate 54.
It means that the installation position of can be decided arbitrarily. Of course, in a mode in which the smokeless roasters having the same structure and specifications are equipped with the accessory equipment with the same specifications, the installation position and the installation angle of the reflector 54 and the installation location of the ultraviolet sensor 62 are made the same by a repeated experiment conducted in advance. If it is found that the reflection plate 54 and the ultraviolet sensor are fixed to a specific support member while maintaining a predetermined state and positional relationship.

Further, between the two support members 67 attached to the back surface of the support plate 9, an electronic circuit board 3 for processing electric signals from the ultraviolet sensor 62 is attached downward. Further, the support plate 9 processes a signal from the microcomputer, a signal from a temperature sensor that senses the temperature of the outer pot, a signal from a gas leak sensor, a signal from a vibration sensor, and the like to process the fuel for the burner. A control panel 65 for controlling gas supply is attached. As shown in FIG. 1, an on-off valve 64 is provided in the middle of the fuel gas supply pipe 34 to the burner 32.
It can be opened or closed automatically or manually by a control signal from the control panel 65 and / or an ignition switch 66.

The smokeless roaster having the above structure first has the following actions and effects as in the prior art. When the ignition switch 66 is twisted to the ignition side, the opening / closing valve 64 is opened, and the fuel gas is supplied to the ignition device (not shown) and the burner 32 through the supply pipe 34. Then, the heating portion 2 of the burner 32
And the ultraviolet sensor 62 is set. Since the ultraviolet rays 52 are emitted from the flame of the heat generating portion 2, the ultraviolet rays 52 pass through the through holes 60, 58 and 56 of the water tank 36, the inner pot 26 and the outer pot 16 in sequence and reach the reflecting plate 54.

The reflector 54 reflects the ultraviolet light 52, but since the ultraviolet sensor 62 exists on the reflected light path, the ultraviolet light 5
2 is sensed, the sensed information is processed by an electronic circuit and sent to the control panel 65. Unless the flame of the heat generating portion 2 is extinguished or the space in the outer pot 16 does not reach a predetermined temperature or higher, the control panel 65 does not issue an OFF signal to the open / close valve 64, so the fuel gas to the burner 32 Is continuously supplied, the roast 38 is heated, and the meat can be baked. It should be noted that the smoke generated on the rust 38 is discharged to the outside through the suction hole 48 of the suction cover 22, the smoke exhaust passage 30, the smoke exhaust duct 18 communicating with the outer pot 16 and the smoke exhaust means. Same as technology.

Under such a circumstance, the heat-generating part 2 should be beaten by something.
When the flame of the lamp disappears, the ultraviolet sensor 62 does not detect the presence of ultraviolet rays, and therefore the control panel 65 has the open / close valve 64.
To the OFF signal. Then, the supply of fuel gas to the burner 32 is cut off, and a gas leak accident is prevented in advance.

The smokeless roaster according to the present invention further exhibits the following actions and effects. When the ultraviolet sensor 62 is installed directly on the optical path of the ultraviolet light 52, the degree of freedom of installation is limited only to the optical path, but the reflector 54 is installed on the optical path and the reflected light is detected by the ultraviolet sensor 62. In the embodiment of the present invention in which the ultraviolet light is received, the installation position of the ultraviolet sensor 62 spreads in the radial direction with the reflection plate 54 as the center. Therefore, the ultraviolet sensor 62 can be provided below the reflector 54 as shown in FIG. 1 or above the reflector 54 as shown in FIG.

In the smokeless roaster, the ultraviolet sensor 6
2 is installed between the gas introduction part of the burner 32 and the on-off valve 64, and the pilot ignition device, the gas supply pipe, etc. are further complicatedly arranged on the introduction part side, so that a free space is provided. Is naturally limited. Therefore, the installation locations of the ultraviolet sensor 62 and the electronic circuit board 3 are extremely limited. In the smokeless roaster of the present invention, since the reflecting plate 54 is provided on the optical path of the ultraviolet rays 52, it is possible to send the ultraviolet rays 52 to the restricted places.

Next, below the table 10, the base plate 3 faces downward on the support plate 9 and two support members 65 are provided.
Since it is mounted in between, the board 3 is protected from dust and water, and as a result, the board 3 is prevented from issuing a malfunction signal to the control board 65. Further, since the table 10 is fixed on the two supporting frames 8 of the casing-shaped base 7 and the base 3 is attached to the supporting plate 9 between the supporting frames 8, the structure of the smokeless roaster is constructed. The present invention has the additional effect of facilitating the handling and assembly of the members during transportation.

The present invention can be carried out by modifying a part of the above-described mode, as long as it does not significantly impair the effects of the invention by following the fundamental technical idea. For example,
The through holes 60, 58, and 56 may have the same transparent height, and a wire net or a stone net may be used in place of the grate. In the present invention, it is naturally allowed to include a microcomputer as the electronic circuit.

[0024]

As described above in detail, the present invention has an excellent effect that the degree of freedom of the installation location of the ultraviolet sensor can be largely secured and the malfunction of the electronic circuit for processing the signal from the ultraviolet sensor can be suppressed. Demonstrate.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a structure of a smokeless roaster according to the present invention.

FIG. 2 is a partially cutaway perspective view showing a part of the table of the smokeless roaster.

FIG. 3 is a sectional view showing the structure of a conventional smokeless roaster.

[Explanation of symbols]

 2 Heat generating part 3 Base plate 4, 5, 6 Side wall 8 Support frame 10 Table 16 Outer pot 26 Inner pot 32 Burner 36 Water tank 44 Burner exposure cylinder 52 UV light 54 Reflector plates 56, 58, 60 Through hole 62 UV sensor 65 Base

Claims (4)

[Claims] 1. An outer pot (1) fitted in a table (10).
6) inside the inner pot (2) for supporting the burner (32)
6) is locked and the heat generating part (2) of the burner is
Exposed Burner Tube (44) That Can Extend Upward
In a smokeless roaster in which a water tank (36) having a central portion is locked to the inner pot, through holes (56, 58, 6
0) is provided so that ultraviolet rays (52) from the heat generating portion can be taken out of the outer pot through the through holes,
An ultraviolet sensor (62) provided with a reflector (54) for reflecting ultraviolet rays at a position outside the outer pot and below the table, and ultraviolet rays from the reflector are provided at the lower position.
Smokeless roaster characterized by being made to sense. 2. The smokeless roaster according to claim 1, wherein the reflector (54) is provided below the table independently of the ultraviolet sensor. 3. An outer pot (1) fitted in a table (10).
6) inside the inner pot (2) for supporting the burner (32)
6) is locked and the heat generating part (2) of the burner is
Exposed Burner Tube (44) That Can Extend Upward
In a smokeless roaster in which a water tank (36) having a central portion is locked to the inner pot, through holes (56, 58, 6
0) is provided so that ultraviolet rays (52) from the heat generating portion can be taken out of the outer pot through the through holes,
An ultraviolet sensor (62) provided with a reflector (54) for reflecting ultraviolet rays at a position outside the outer pot and below the table, and ultraviolet rays from the reflector are provided at the lower position.
The electronic circuit board (3) for processing the electric signal from the ultraviolet sensor downwardly with respect to the support frame (8) supporting the table,
A smokeless roaster characterized by being fixed independently of the table. 4. The smokeless roaster according to claim 3, wherein the reflector (54) is provided below the table independently of the ultraviolet sensor.