JP3129193B2 - Smokeless roaster - Google Patents

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 burns out.

[0002]

2. Description of the Related Art When roasting meat or barbecue in a roaster at a restaurant or hotel, smoke is generated from the roaster, and 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 provided at the center of a table 10 fixed on a casing base (not shown), and an outer funnel 16 having a substantially funnel shape is fitted into the mounting hole 12. ing. A bottomed cylindrical inner kettle 26 having a smaller diameter than the outer kettle 16 is locked in the outer kettle 16, and a burner 32 is installed on the bottom 1.

Further, at the center of the bottom of the inner pot 26, there is provided a burner exposure tube 44 which allows the heat generating portion 2 of the burner 32 to penetrate and project upward, and a water 37 is provided outside the burner exposure tube 44. Is locked. A rostor 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 a U-shaped cross section in the radial direction, and an annular flue gas passage 30 formed between the outer kettle 16 and the inner kettle 26. The upper space of the roaster 38 communicates with a plurality of suction holes 48 formed in the inner wall 46 of the suction cover 22.

When meat and vegetables are grilled using the smokeless roaster having the above structure, the meat and vegetables are burned and smoke is generated when the meat and vegetables are placed on the roaster 38 and ignited to the heat generating portion 2 of the burner 32. However, since the inside of the outer cooker 16 is decompressed by a smoke exhausting means (not shown) provided outside thereof, the smoke is sucked by the suction hole 48 of the suction cover 22, the smoke exhaust passage 30 and the outer cooker 16. Flue gas duct 1 communicating with
8 and is discharged outside through the smoke exhaust means.

[0005]

SUMMARY OF THE INVENTION The smokeless roaster comprises:
It has the effect of suppressing indoor pollution due to smoke when burning meat etc., but because the burner is used as a burning means, the flame of the heating part of the burner goes out like other burning means It is necessary to take measures to stop the supply of fuel to the burner by sensing the disappearance.

However, if a known flame extinguishing sensor is mounted on the smokeless roaster having the above structure,
There are the following problems: (1) If the meat is baked using the smokeless roaster, components such as the roastle, the suction cover, the burner, and the inner pot are contaminated, so it is necessary to remove them from the outer pot and clean them. Therefore, the flame extinguishing sensor cannot be directly attached to the component.

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

(3) Further, a board for an electronic circuit for processing an electric signal from the ultraviolet sensor is provided outside the outer hook, and the board is installed in a smokeless roaster having the above structure. If it is provided without particular consideration to the location and the installation method, there is a risk that dust or moisture will adhere to the base and disrupt its electronic circuit. Therefore, the present inventor has conducted various studies to solve the above-mentioned problem, and if the light reflecting means is provided on the optical path and the base is installed at a predetermined position in a specific state, the location of the ultraviolet sensor The present inventors have found that the degree of freedom can be largely secured and the malfunction of an electronic circuit for processing a signal from an ultraviolet sensor can be suppressed, and the present invention has been completed.

[0009]

According to a first aspect of the present invention, an inner shuttle for supporting a burner is locked in an outer shuttle fitted on a table, in order to solve the above-mentioned problem. In a smokeless roaster in which a water tank having a burner exposure cylinder at a central portion capable of projecting a heat generating portion of the burner upward is locked to the inner kettle, the water tank, the inner kettle and the outer kettle are provided on respective side walls. Through holes are provided, and ultraviolet rays from the heat generating portion are taken out of the outer kettle through the through holes, and a reflecting plate is provided outside the outer kettle and at a position below the table to reflect the ultraviolet rays. Then, means for causing the ultraviolet ray sensor to detect the ultraviolet ray from the reflection plate is adopted.

According to a second aspect of the present invention, in addition to the above-mentioned means, a base of an electronic circuit for processing an electric signal from the sensing portion of the ultraviolet sensor is further directed downward with respect to a support frame supporting the table. In addition, means for fixing independently of the table is adopted.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. The structure of the smokeless roaster according to the present invention is basically almost the same as 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. At the same time, the burner 3
2 are installed.

A water tank 36 having a frusto-conical burner exposure tube 44 at the center thereof is locked to a locking portion 42 projecting in a ring shape inside the inner pot 26. Outside the exposure tube 44, water 37 for floating the gravy is stored.

A ring-shaped locking portion 24 is provided inside the upper end of the outer hook 16, and the suction cover 22 locked by the locking portion 24 is connected to the upper end of the outer hook 16 and the upper end of the inner hook 26. Between the outer pot 16 and the inner pot 26, and the space above the roaster 38 placed in the water tank 36.
The inner wall 46 communicates with the inner wall 46 through a suction hole 48 provided through the inner wall 46.

In the smokeless roaster according to the present invention, furthermore, 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 are located above the heat generating portion 2 of the burner 32. Through hole 5 large enough to allow
6, 58 and 60 are respectively provided and the burners 32
The ultraviolet rays 52 emitted by the flame of the heat generating portion 2 can be taken out 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 a casing-like base 7 for supporting the table 10. The support plates 9 are screwed. On the back surface side of the support plate 9, one reflector 54 is supported by two support members 67 extending parallel and vertically downward in the optical path of the ultraviolet light, and is reflected by the reflector 54. An ultraviolet sensor 62 for detecting ultraviolet light is attached to the support plate 9 independently of the reflection plate 54. Here, “independent” means that if the installation position of the reflection plate 54 is determined,
It does not mean that the installation position of the UV sensor 62 is necessarily determined, but by changing the installation angle of the reflector 54.
This means that the installation position can be determined arbitrarily. Of course, in a mode in which the accessory equipment is equipped with the same specifications in a smokeless roaster having the same structure and specifications, by repeating the experiment conducted in advance, the installation position and the installation angle of the reflector 54 and the installation location of the ultraviolet sensor 62 are made the same. If it is determined that the reflection plate 54 and the ultraviolet sensor can be fixed to each other, the reflection plate 54 and the ultraviolet sensor can be fixed to a specific support member while maintaining a predetermined state and positional relationship.

A base 3 of an electronic circuit for processing an electric signal from the ultraviolet sensor 62 is mounted downward between two support members 67 mounted on the back surface of the support plate 9. Further, the support plate 9 processes a signal from the microcomputer, a signal from a temperature sensor for sensing the temperature of the outer kettle, a signal from a gas leak sensor, a signal from a vibration sensor, and the like to process 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.

First, the smokeless roaster having the above structure has the following operation and effects as in the prior art. When the ignition switch 66 is turned to the ignition side, the on-off valve 64 is opened, and fuel gas is supplied to the ignition device (not shown) and the burner 32 through the supply pipe 34. Then, the heating part 2 of the burner 32
And the ultraviolet sensor 62 is set. The ultraviolet rays 52 are radiated from the flame of the heat generating part 2, and the ultraviolet rays 52 reach the reflection plate 54 through the water tank 36, the inner pot 26, and the through holes 60, 58, 56 of the outer pot 16 in order.

The reflecting plate 54 reflects the ultraviolet light 52, but since the ultraviolet light sensor 62 exists on the reflected light path, the ultraviolet light 5 is reflected.
2 is sensed, the sensed information is processed by an electronic circuit and sent to the control panel 65. The control panel 65 does not issue an OFF signal to the open / close valve 64 unless the flame of the heat generating section 2 is extinguished or the space in the outer pot 16 does not exceed a predetermined temperature. Is continued, the roastles 38 are heated, and the meat is ready to be roasted. In addition, it is conventional to discharge smoke generated on the roaster 38 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 circumstances, the heat generating portion 2
When the flame goes out, the UV sensor 62 does not detect the presence of the UV light.
, An OFF signal is issued. Then, the supply of the fuel gas to the burner 32 is shut off, thereby preventing a gas leak accident.

In the smokeless roaster according to the present invention, the following actions and effects are further exhibited. When the ultraviolet sensor 62 is directly installed on the optical path of the ultraviolet light 52, the degree of freedom of the installation is limited only on the optical path. However, the reflecting plate 54 is installed on the optical path and the reflected light is transmitted to the ultraviolet sensor 62. In the embodiment of the present invention in which light is received by the ultraviolet ray sensor, the installation position of the ultraviolet sensor 62 spreads radially around the reflection plate 54. Accordingly, the ultraviolet sensor 62 can be provided below the reflection plate 54 as shown in FIG. 1 or can be provided above the reflection plate 54 as shown in FIG.

In the smokeless roaster, the UV sensor 6
Numeral 2 is installed between the gas inlet of the burner 32 and the on-off valve 64, and an ignition device for a pilot flame and, of course, a gas supply pipe and the like are complicatedly arranged on the inlet side. Is naturally limited. Therefore, the places where the ultraviolet sensor 62 and the electronic circuit board 3 are installed are extremely limited. In the smokeless roaster of the present invention, since the reflection plate 54 is provided on the optical path of the ultraviolet light 52, the ultraviolet light 52 can be sent to the restricted place even in the above-mentioned restricted place.

Next, the base 3 faces downward on the support plate 9 below the table 10, and the two support members 65
Since the base 3 is mounted in between, the base 3 is protected from dust and moisture, and as a result, the base 3 is prevented from transmitting a malfunction signal to the control panel 65. In addition, the table 10 is fixed on the two support frames 8 of the casing base 7 and the base 3 is attached to the support plate 9 between the support frames 8, so that these smokeless roasters are configured. The present invention has the additional effect of facilitating handling and assembling of members during transportation.

The present invention can be practiced with some of the above-mentioned aspects changed within a range that does not significantly impair the effects of the present invention following the fundamental technical idea thereof. For example,
The penetration heights of the through holes 60, 58 and 56 can be made the same, and a wire mesh or a stone mesh can be used instead of the rostral. In the present invention, it is naturally permissible 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 position 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 the table of the smokeless roaster with a part cut away.

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

[Explanation of symbols]

 2 Heating part 3 Base 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 Ultraviolet 54 Reflector 56, 58, 60 Through hole 62 Ultraviolet sensor 65 Base

Claims (4)

(57) [Claims] An outer pot (1) fitted in a table (10).
6) An inner pot (2) for supporting the burner (32)
6) and the heat generating portion (2) of the burner.
Burner exposure cylinder (44) that can project
In a smokeless roaster having a water tank (36) having a center in the inner pot, the side walls (4, 5, 6) of the water tank, the inner pot and the outer pot have through holes (56, 58, 6
0), and ultraviolet rays (52) from the heat generating portion are taken out of the outer kettle through the through holes.
An ultraviolet sensor (62) provided with a reflecting plate (54) for reflecting ultraviolet light at a position outside the outer hook and below the table, and providing ultraviolet light from the reflecting plate at the lower position.
A smokeless roaster characterized in that it is 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 hook (1) fitted to a table (10).
6) An inner pot (2) for supporting the burner (32)
6) and the heat generating portion (2) of the burner.
Burner exposure cylinder (44) that can project
In a smokeless roaster having a water tank (36) having a center in the inner pot, the side walls (4, 5, 6) of the water tank, the inner pot and the outer pot have through holes (56, 58, 6
0) is provided, and ultraviolet rays (52) from the heat generating portion are taken out of the outer pot through the through holes,
An ultraviolet sensor (62) provided with a reflecting plate (54) for reflecting ultraviolet light at a position outside the outer hook and below the table, and providing ultraviolet light from the reflecting plate at the lower position.
The electronic circuit board (3) for processing the electric signal from the ultraviolet sensor is turned downward with respect to the support frame (8) supporting the table,
And a smokeless roaster 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.