JP3176327B2 - 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 structure of a smokeless roaster, and more particularly to a structure of a smokeless roaster which detects whether or not a flame is emitted from a heat generating portion thereof by light rays from the flame.

[0002]

2. Description of the Related Art As shown in FIG. 2, a bottomed cylindrical inner hook 4 is locked in a funnel-shaped outer hook 2 fitted on a table 1, and a burner 3 is supported on the bottom of the inner hook 4. A smokeless roaster in which a water tank 7 having a burner surrounding tube 6 surrounding the heat generating portion 5 at the center thereof is engaged with the inner pot 4 is known (Japanese Patent Application Laid-Open No. 9-117376).

In the smokeless roaster having this structure, the light sensor 14 detects a light beam 14 emitted from the flame of the heat generating portion 5 to monitor the extinguishing of the flame. Therefore, when the flame goes out, the light sensor 15 operates sensitively, and the supply of the fuel gas supplied to the burner 3 is automatically stopped. Therefore, the smokeless roaster having this structure sufficiently secures safety in use. Have been.

[0004]

However, when the smokeless roaster has been used for a long period of time, the light sensor 15 is too sensitive and the fuel gas of the burner 3 is automatically stopped, although very rarely. It turns out that there are cases. Therefore, the present inventors investigated the cause, and found that the level of water contained in the water tank 6 was significantly reduced and the water temperature was increased, and as a result, water vapor affected the optical sensor 15.

That is, the abnormally generated water vapor passes through the through holes 11, 12, which are the passages of the light beam 14 provided on the side walls 8, 9, 10 of the water tank 7, the inner pot 4, and the outer pot 2, respectively.
13, the surface of the optical sensor 15 or the reflecting mirror 19 provided on the optical path of the light beam 14 is clouded.
As a result, the optical sensor 15 loses sight of the presence of the light and responds by stopping the supply of the fuel gas to the burner 3, so that the use of the smokeless roaster has to be stopped.

However, the optical sensor 15 is usually a box 17
, The cloudiness of the optical sensor 15 or the reflecting mirror 19 cannot be wiped off, and it takes a considerable time to restart the smokeless roaster. The object of the present invention is to
It is an object of the present invention to provide a smokeless roaster having a structure capable of promptly resuming the use of the smokeless roaster when the smokeless roaster has to be stopped due to abnormal evaporation of water in the water tank.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention locks an inner pot for supporting a burner in an outer pot fitted on a table and heats the burner. In a smokeless roaster in which a water tank having a burner enclosure at the center thereof capable of projecting a part upward is locked to the inner pot, through holes are provided in respective side walls of the water tank, the inner pot, and the outer pot. A light transmissive member is provided on the front side of an optical sensor that senses the light beam while providing a light transmissive body that does not allow gas to pass through but allows the light beam to pass through, while taking out the light beam from the heat generating portion through the through hole. Means for preventing the water vapor radiated to the outside through the light sensor from reaching the optical sensor.

[0008]

Next, an embodiment of the present invention will be described with reference to the drawings. The basic structure of the smokeless roaster according to the present invention is almost the same as that of the prior art. That is, as shown in FIGS. 1 and 2, the outer shuttle 2 is first fitted into the table 1, and the inner shuttle 4 is locked therein.
Further, a water tank 7 is locked in the inner pot 4, and the water tank 7 has a burner surrounding cylinder 6 formed of a tapered rising wall at the center of the bottom. Water 20 for receiving gravy dripping from the roasted meat during use of the smokeless roaster is placed at a predetermined depth in the annular bottom.

Further, a burner 3 is installed at the bottom of the inner pot 4, and a heat generating portion 5 thereof is exposed upward from the burner surrounding tube 6. In addition, water tank 7, inner pot 4
And the side wall 8, 9, 10 of the outer pot 2 has a through hole 1
1, 12, 13 are formed and their through holes 11,
Light rays 14 radiated from the flame 21 of the heat-generating portion 5 through 12 and 13 are taken out of the outer hook 2. In addition, the through hole 13 of the outer hook 2 has a size such that at least several fingers of a human hand can enter.

A box 17 is provided below the table 1 and outside the outer hook 2, and inside the box 17 is a reflecting mirror 19 for the light beam 14 and an optical sensor 15. The light beam 14 that has reached the inside through the window 18 is reflected by the reflecting mirror 19 and reaches the optical sensor 15. The reflecting mirror 19 changes the optical path of the light beam 14 so that the fixing position of the optical sensor 15 can be arbitrarily changed due to the arrangement of other components necessary for the smokeless roaster, for example, the gas supply pipe and the electric signal system. However, when it is not necessary to ensure such a degree of freedom, the light beam 14 can be made to directly reach the optical sensor 15.

Further, the window 18 of the box 17 is provided with a transmitting body 16 which does not allow the passage of water vapor but allows the passage of light. As such a transmitting body 16, a sheet glass, particularly an ultraviolet transmitting glass containing a large amount of quartz, a synthetic resin film or an air flow serving as an air curtain is used. Other configurations are substantially the same as those of the conventionally known smokeless roaster, but preferably, the through hole 12 of the inner pot 4 and the through hole 13 of the outer pot 2 are connected by a cylindrical or square tubular communication pipe 22. It is connected so that the light beam 14 passes through it.

The operation of the smokeless roaster according to the present invention having the above-described structure will be described. During the roasting on the roaster 23 placed above the heating section 5, water in the water tank 7 is heated. Although the water level gradually decreases, when the level is abnormally low, the normal water tank 7 is refilled with water.
However, if you forget to replenish, the water will boil to steam. Then, the water vapor flows through the through holes 11, 12 and 1
3, the light is radiated outward, and part of the light reaches the box 17 in which the optical sensor 15 is housed.

However, since the window 18 of the box 17 is provided with the transmitting body 16 which does not allow gas to pass therethrough but allows light to pass through, the water vapor is prevented from reaching the optical sensor 15. Collide and cloud it. Then the optical sensor 1
In response, the supply of fuel gas to the burner 3 is stopped. At this time, if the water tank 7 and the inner pot 4 are removed from the smokeless roaster and hands are inserted through the through-hole 13 of the outer pot 2 or a jig is inserted to wipe off water droplets on the outer surface of the permeator 16, the permeator 16 is restored again. The permeability is restored. Therefore, the use of the smokeless roaster can be quickly resumed.

[0014]

As described above in detail, the present invention has an excellent effect that when the smokeless roaster is stopped due to abnormal evaporation of the water in the water tank, the reuse of the smokeless roaster can be promptly started. I do.

[Brief description of the drawings]

FIG. 1 is an enlarged view of a main part of a smokeless roaster according to the present invention.

FIG. 2 is a schematic view showing a common structure of a smokeless roaster according to the present invention and the prior art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Table 2 Outer pot 3 Burner 4 Inner pot 5 Heating part 6 Burner enclosure 7 Water tank 8, 9, 10 Side wall 11, 12, 13 Through hole 14 Light ray 15 Optical sensor 16 Light transmitting body 17 Box 18 Window part

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A47J 37/06

Claims (2)

(57) [Claims] An inner pot (4) for supporting a burner (3) is locked in an outer pot (2) fitted in a table (1), and a heat generating portion (5) of the burner is connected to the outer pot (2). In a smokeless roaster in which a water tank (7) having a burner enclosing cylinder (6) at the center which can be protruded upward is locked to the inner pot, respective side walls of the water tank, the inner pot and the outer pot ( 8, 9, 10) are provided with through holes (11, 12, 13), and light rays (14)
A light transmitting body (16) that does not allow gas to pass through but allows the light to pass therethrough, and a light transmitting body (16) that allows the light to pass therethrough is provided on the front side of the optical sensor (15) that senses the light. A smokeless roaster characterized in that water vapor radiated to the outside through the light sensor is prevented from reaching the optical sensor. 2. The optical sensor (15) is installed in a box (17) and includes the light transmitting body (16).
2. The smokeless roaster according to claim 1, wherein the rotatable member is attached to a window (18) of the box.