JPH0619957Y2 - Heat-sensitive cover for gas burner - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a cover of a heat-sensitive part in a gas burner having a heat-sensitive part for abutting on the bottom of a pan to detect the temperature of the pan.

<Prior Art> A gas burner is known in which a thermosensitive part including a thermocouple, a thermistor and the like is provided, and the pan is brought into contact with the bottom to detect the temperature of the pan. Usually, this type of gas burner has a vertically penetrating hole in the center of the gas burner, and a support rod whose lower end is fixed to the instrument body is passed through this hole, and the heat-sensitive part urged upward at its tip. Is installed. The above-mentioned through hole also serves as a passage for the air flow rising therethrough, and cools the heat-sensitive part which is heated by the radiant heat from the burner, etc. by this air flow. A cylindrical cover surrounding the heat sensitive portion may be provided to block the heat. In this case, it is necessary to prevent the cooling airflow from blocking because the top surface is blocked by the pan.Therefore, the heat-sensitive part cover should also be provided at a position lower than the protruding position of the heat-sensitive part, and should be placed between the top edge of the cover and the pan bottom. There is a certain gap between the two.

<Problems to be solved by the invention> In this way, since a certain gap is created between the upper edge of the heat-sensitive part cover and the bottom of the pan, radiant heat enters from here, or the spilled juice from the pan reaches the vicinity of the heat-sensitive part. There is a high possibility that it will reach the inside of the device. In particular, in so-called gas appliances for system kitchens, since it is necessary to completely prevent broth from entering the inside of the appliances, the conventional cover as described above has insufficient function and is not suitable for practical use. there were.

Although it has been proposed to provide a ventilation hole in the upper part of the heat-sensitive section cover (see, for example, Japanese Utility Model Laid-Open No. Sho 60-21850), this is one in which a ventilation hole is provided in a straight cylindrical portion, The radiant heat from the flame is likely to enter inside, and there is a high possibility that broth will enter from the ventilation holes.

The present invention has been made in view of these problems, and an object thereof is to provide a heat-sensitive part cover that has a high shielding effect against radiant heat and that can prevent the intrusion of broth.

<Means for Solving the Problems> In order to achieve the above-mentioned object, in the present invention, the upper peripheral portion of the heat-sensitive section cover formed in a cylindrical shape so as to surround the heat-sensitive section above the burner has a large diameter at the upper side. A plurality of ventilation holes are formed in the tapered portion, and the axis of the ventilation hole is inclined downward with respect to the flame coming out of the flame port.

<Operation> Since the plurality of ventilation holes are formed in the upper peripheral edge, the flow of the cooling airflow is not obstructed even if the top surface is blocked by the pan. Therefore, it is possible to raise the position of the cover to enhance the function of preventing radiant heat and infiltration of broth.

Further, since the axis of the vent hole is inclined downward with respect to the flame, the radiant heat is less likely to enter the outside, particularly the substantial opening area when the flame is seen, and the broth that flows down the outside is also less likely to enter.

<Example> Next, one example shown in the drawings will be described.

FIG. 1 is a side view and a plan view of a heat-sensitive part cover, and FIG. 2 is a side sectional view of an example of a burner provided with this heat-sensitive part cover.

In the figure, 1 is a heat-sensitive part cover, 2 and 3 are burner tops and burner bases that are combined to form a burner head 4, 5 is a heat-sensitive part, and 6 is a support rod of the heat-sensitive part 5. The burner top 2 and the burner base 3 are annular and each have a hole 7 formed vertically through the center thereof, and the lower end of the support rod 6 is appropriately fixed to an instrument body (not shown) to penetrate the hole 7. The heat sensitive portion 5 is attached to the tip of the support rod 6 so as to be vertically movable within a certain range and biased upward by a spring. The heat sensitive section 5 has a built-in thermocouple, thermistor, etc., and the lead wire 8 is led out to a control section (not shown) via the tubular support rod 6. Reference numeral 9 is a mixing tube, and 10 is a flame port. Although not shown, the flame port 10
Are formed on the peripheral surface of the burner top 2 at predetermined intervals.

The heat-sensitive part cover 1 has a tubular shape with an upper edge thereof having a large diameter part 1a via an annular tapered part 11, and a plurality of ventilation holes 12 are formed in the tapered part 11 in a direction perpendicular to the surface of the tapered part 11. Are formed at regular intervals. Since it is difficult to forge the heat-sensitive part cover 1 integrally with the burner top 2, the heat-sensitive part cover 1 is manufactured as a separate component and then integrally fixed to the central upper surface of the burner top 2 by an appropriate means. This fixing is performed, for example, by forming a groove 13 on the outer surface of the lower edge as shown in the drawing, forming a groove 14 also on the upper surface of the corresponding burner top 2, and connecting the both using a C ring 15. Groove 13, groove 14,
The size and shape of the C ring 15 are selected so as not to cause internal stress in the heat-sensitive part cover 1 and the burner top 2 so as not to cause plastic deformation and to be securely fixed. 1
6 is Gotoku and 17 is the pot bottom when in use.

That is, during use, the heat-sensitive part 5 is in contact with the pot bottom 17 and is pushed down like a chain line.
The detection result of the temperature of the pan bottom 17 is used for control.
Most of the radiant heat from the flame coming out of the flame outlet 10 is blocked by the heat-sensitive part cover 1 and does not reach the heat-sensitive part 5, and the heat-sensitive part 5 is cooled by the rising airflow passing through the hole 7.
The temperature of 7 is accurately detected by the heat sensing unit 5.

Here, in this invention, since the plurality of ventilation holes 12 are formed in the heat-sensitive part cover 1, the gap G between the upper surface of the heat-sensitive part cover 1 and the pan bottom 17 becomes small, and in the extreme case, the upper surface is Even if it is blocked by the bottom 17 of the pan,
The airflow through the holes 7 can be circulated through the ventilation holes 12 without any trouble, and since the ventilation holes 12 are provided at the upper peripheral edge of the heat-sensitive part cover 1, the heat-sensitive part 1 is not insufficiently cooled. . Therefore, it is possible to raise the heat-sensitive part cover 1 and obtain a good effect of blocking radiant heat from the outer periphery. Further, when the heat-sensitive part cover 1 is brought into contact with the pan bottom 17 at the time of use. It is also possible to prevent the broth falling along the bottom 17 of the pot from entering the inner surface of the heat-sensitive part cover 1.

Further, since the ventilation hole 12 is provided in the tapered portion 11, the axis of the ventilation hole 12 is inclined downward with respect to the flame emitted from the flame port 10. Therefore, as compared with a case where a ventilation hole is provided in a mere cylindrical heat-sensitive part cover, a substantial opening area can be reduced with respect to the radiant heat from the flame without reducing the total area of the ventilation hole 12 itself. The influence of radiant heat due to the provision of the holes 12 can be reduced. Further, since the vent hole 12 is inclined and the inner wall surface of the vent hole 12 is higher inside, the broth is less likely to enter the inside.

<Effects of the Invention> As is apparent from the above-described embodiments, the present invention is one in which a plurality of ventilation holes are formed in the taper portion of the upper peripheral edge of the heat-sensitive section cover with its axis inclined downward with respect to the flame. Therefore, even if the top surface is blocked with a pan, the flow of the cooling air flow is not obstructed.

Therefore, it is not necessary to set the height of the upper surface of the heat-sensitive part cover to a certain degree low in order to always ensure a predetermined gap for various pots of different shapes and sizes. It is possible to enhance the function of preventing radiant heat and the inflow of broth, and because the ventilation holes are inclined, it is possible to obtain the effect that radiant heat and broth are hard to enter through the ventilation holes, and it is also practical for gas appliances for system kitchens. It is possible to obtain a possible heat sensitive part cover.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 (a) and 1 (b) are a partially cutaway side view and a plan view of a heat-sensitive part cover according to an embodiment of the present invention, and FIG. 2 is a burner equipped with the heat-sensitive part cover. It is a side sectional view of an example. 1 ... Heat sensitive part cover, 2 ... Burner top, 3 ... Burner base, 4 ... Burner head, 5 ... Heat sensitive part, 11 ...
… Tapered part, 12 …… Ventilation hole.

Claims (1)

[Scope of utility model registration request] 1. A burner which is formed in a tubular shape so as to surround a heat-sensitive portion provided on an upper portion of a burner, and which has a taper portion having a large diameter at an upper portion and which has a plurality of ventilation holes formed therein. , A heat-sensitive section cover for a gas burner in which the axis of the vent hole is inclined downward with respect to the flame coming out of the flame port.