JPS5952134A - Forced heat circulating type gas oven - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention aims to achieve accurate cooking by sucking high-temperature gas consisting of exhaust gas and air into a fan and blowing it to a combustion box, and with a simple structure. This invention relates to a forced hot air circulation gas oven that allows low-temperature cooking.

In general, this type of forced hot air circulation gas oven has a burner combustion chamber 2 at the bottom of a combustion box 1, a circulation fan 3 at the rear, as shown in FIG. It has a structure in which a sintering section and a combustion section are integrated, and the combustion exhaust from the main burner 4 and pilot burner 6 generated in the combustion chamber 2 is sent into the combustion box 1 by the circulation fan 3 to be combusted.

When the main burner 4 is burning, the temperature inside the combustion box 1 is about 300° C., making it possible to perform high-temperature cooking.

However, when the combustion chamber 1 of the main burner 4 is stopped,
The internal temperature is high due to the continuous combustion of the starter burner 6, and is approximately 36°C to 46°C, suitable for the primary and secondary fermentation of yeast for making bread, and approximately 46°C for yogurt fermentation. It was not suitable for low-temperature cooking as it was unable to maintain the temperature between the front and back.

As an improved structure of the gas oven, as shown in Fig. 2, there is one in which the pilot burner 6 is moved outside the combustion chamber and a transfer burner 4' is installed, but the structure is different, such as the need for the transfer burner 4'. It was getting complicated.

The present invention provides a pilot burner guide plate and an exhaust pipe for the pilot burner, and exhausts the combustion heat (exhaust) of the pilot burner.
It maintains the inside of the roasting box at a low temperature to enable low-temperature cooking.

Hereinafter, one embodiment of the present invention will be described based on FIGS. 3 to 5.

6 is an exterior case with an air lower on the bottom and an exhaust port 8 on the top, 9 is a roasting box whose front opening can be opened and closed by a front door 10, and the back of the roasting box 9 has a hot air inlet in the center of the cupboard. 11,
A hot air partition plate 14 having hot air blowing holes 12 on the left and right sides and an exhaust hole 13 for discharging hot air at the top, and a combustion chamber 16! Suction chamber 16. There is a combustion box 18 with a fan storage chamber 17, and the roasting box 9, hot air partition plate 14, and combustion box 18 are each separate pieces.
It has a configuration in which a hot air partition plate 14 and a combustion box 18 are attached to the back of the roasting box 9 via screws. The combustion chamber 16 is located at the lower part of the combustion box 18, and has a combustion air inlet 19 formed in the peripheral wall and a combustion gas vent 20 opening into the suction chamber 16 in the top wall. is stored. In addition, the suction chamber 16 is specially formed so that its partition wall 22 surrounds the hot air suction 11111 of the hot air partition plate 14, and a suction port 24 is bored facing the suction side of the fan 23 provided in the storage chamber 17. It is. Furthermore, it extends to both sides of the fan storage chamber 170 and communicates with the hot air outlet 12.
It constitutes the Il exit path system. 26 is a hot air partition plate 14
This is an exhaust 1n connected to the upper exhaust hole 13 of the .

Reference numeral 27 denotes a pilot burner disposed close to the flame hole on the mixing tube side of the main burner 21, and a pilot burner guide plate 28 is provided opposite the f+fi fire burner 27. The hole 9 is a fixed plate between the pilot burner and the main burner 21, and is L-shaped, and extends from the inside of the combustion chamber 16 to the outside. Reference numeral 30 designates a removable pilot burner exhaust pipe formed of a U-shaped plate provided on the side wall 31 of the combustion box 18 on the pilot burner 27 side. The side wall of the combustion chamber 16 of the side wall 31 of the combustion box 18 is connected to the pilot burner 2.
A fan storage chamber 17 is provided so that the hot combustion air of 7 can be easily discharged.
Open 1-1 until it approaches the bottom surface 32. Further, the lower end of the pilot burner exhaust pipe 30 extends at the fixing plate 29'' of the pilot burner 27 and the main burner 21, making it difficult for outside air to enter the combustion chamber 15.

33 is a motor for driving the fan 23, 34 is a bath cooling fan, 36 is a gas cock, 36 is a gas valve, and 37 is a solenoid valve.

The combustion hot air from the steamer 27 flows into the drawing chamber 16, is sucked by the steamer 71, and enters the roasting box 9 through the hot air outlet 12 of the hot air partition plate 14. The hot combustion air that enters the roasting box 9 heats the food to be cooked, and a part of the air enters the suction chamber 16 through the suction port 1 of the hot air partition plate 14, and the combustion air enters the main burner 21 and the pilot flame 27. It joins with the hot air of combustion, and a part of it flows through the exhaust hole 13 of the hot air partition plate 14 to the exhaust pipe 2.
6 and is discharged from the discharge port 8.

When the engine 71 and engine 23 are stopped and the pilot flame nozzle 27 continues to burn, the high temperature air from the pilot flame nozzle 27 is
The hot air passing through the gas vent 20 to the pilot burner guide plate 28 and flowing into the roasting box 9 is suppressed, and most of the hot air is removed from the pilot burner exhaust pipe 30 provided on the side wall 31 of the combustion box 18. As the temperature inside the roasting box 9 can be maintained at a low temperature even when the fan is stopped, the temperature inside the roasting box 9 can be maintained at a low temperature. In the case of continuous combustion, the hot combustion air from the pilot flame 27 shows the same flow as described above, and the temperature inside the roasting box 9 can be maintained at a low temperature. In the case of rotating, the pilot flame)
As the combustion hot air of the burner 27 and the outside air mix, the temperature of the combustion hot air decreases and the temperature inside the roasting box 9 can be maintained at a low temperature without increasing. Even if the pilot burner is driven, the pilot burner guide plate 28 is provided.Also, since the gap between the pilot burner exhaust pipe 3o and the fixed plate 29 is small, there is almost no wind intrusion and stable combustion is achieved. O In addition, the pilot burner guide plate 28 not only regulates the flow of hot combustion air of the pilot burner 27, but also prevents the flame of the pilot burner 27 from being blown out due to the wind (E) generated when the front door 1o is closed. It also serves as a windbreak.

The forced heat circulation type gas oven according to the present invention has a main burner and a pilot burner in the same combustion chamber, an exhaust pipe for the pilot burner on the side wall of the combustion box, and a pilot burner guide plate. Regardless of whether or not it is driven, the temperature of the roasting box can be maintained at a low temperature, and low-temperature cooking of yeast fermentation and yogurt fermentation for making bread can be performed on an OJ basis. In addition, low-temperature cooking can be carried out with a simple structure without the need to provide a transfer burner or a complicated structure such as installing a pilot burner outside the combustion chamber as in the prior art.

[Brief explanation of drawings]

FIGS. 1 and 2 are longitudinal sectional views of a conventional example, FIG. 3 is a longitudinal sectional view of a forced hot air circulation type gas oven showing an embodiment of the present invention, and FIG. 4 is a cross sectional view of the same combustion chamber. FIG. 6 shows a perspective view of the combustion chamber as seen from the rear of the combustion box. 9... Roasting box, 16... Combustion chamber, 18
... Combustion box, 21 ... Main burner, 23
...Fan, 27 ... Pilot burner, 2
8... Pilot burner guide plate, 30...
Exhaust pipe for pilot burner, 31...Side wall. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 4

Claims (2)

[Claims] (1) In a forced heat circulation type gas oven, which is similar to a combustion box and a roasting box, which cooks with the high-temperature gas, the combustion box is equipped with a combustion chamber and a fan for sucking and discharging high-temperature gas after combustion. A forced heat circulation type gas oven in which a pilot burner is provided close to a main burner and a flame hole of the main burner, and an exhaust pipe for the pilot burner is provided on the side wall of the combustion box on the pilot burner side. (2) The forced heat circulation type gas oven according to claim 1, wherein a pilot burner guide plate is provided opposite to the pilot burner in the combustion chamber.