JPS593230Y2 - gas heating device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a type of gas heating device, such as a gas oven, in which a burner is activated depending on the temperature within a heating chamber.

This type of device proportionally controls the gas supply amount according to the temperature in the heating chamber, and therefore the gas burner must also burn in response to each gas supply amount from the maximum to the minimum.

However, in order to allow the yeast to undergo secondary fermentation, it is necessary to keep it warm (about 7
When the minimum gas supply amount is set to obtain a temperature lower than the 0° C. range, for example, about 35° C., the burner may not be able to form a flame, or even if it does burn, it will be incompletely burned.

In particular, when the heating chamber is heated only by the main burner, no hot air enters the heating chamber when such a phenomenon occurs, and as a result, the device may not function even if the scale is set to a low temperature.

The present invention has been developed in view of the above points, and when adjusting the low temperature, the minimum amount of gas is supplied to a small-capacity gas burner, such as a pilot burner, for combustion, and when adjusting the high temperature, the gas is supplied to the main burner. The purpose is to achieve good combustion from low to high temperatures and to adjust the temperature without any trouble.A main burner and an auxiliary burner are installed in the heating chamber or a combustion chamber connected to this chamber, and both burners are In a gas heating device comprising a series of gas passages, the gas passage is provided with a proportional control valve that adjusts the opening degree of the passage according to the temperature in the heating chamber, and the upstream side of the proportional control valve and the main burner are connected to each other. The downstream side of the proportional control valve and the auxiliary burner are communicated with each other through an auxiliary gas valve that guarantees a minimum flow rate, and each of the main and auxiliary gas valves is connected to the main gas valve, which is normally closed. The above object is achieved by a configuration in which the operating rods are arranged oppositely with a predetermined gap in the operating direction.

Hereinafter, the embodiment will be explained with reference to the figures. 1 is a main burner disposed in a combustion chamber (not shown) connected to a heating chamber (not shown), and 2 is a main burner disposed close to this main burner 1. 3 is a sensor that detects the temperature inside the heating chamber.

4 is a gas passage leading to the main burner 1 and the pilot burner 2; a manual cock 5 - a proportional control valve 6 controlled by the sensor 3;
- The compound valve device 7 is connected in this order, and gas is supplied from the compound valve device 7 to both the burners 1 and 2.

8 is a bypass passage that communicates the upstream gas passage 4 of the proportional control valve 6 with the composite valve device 7.

Here, the composite valve device 7 includes a main communication port 9 with the bypass passage 8, a main discharge port 10 to the main burner 1, and a proportional control valve 6.
Auxiliary communication port 12 to the pilot burner 2 and an auxiliary discharge port 1 to the pilot burner 2
3, the main communication port 9 and the main discharge port 10 are communicated by a normally closed main gas valve 14, and the auxiliary communication port 12 and the auxiliary discharge port 13 are connected to a normally closed auxiliary gas valve having a minimum flow rate hole 15. The gas valve 16 allows communication.

Further, the operating rods 17 and 18 of the main gas valve 14 and the auxiliary gas valve 16 are disposed vertically on the same axis, and are supported by diaphragms 19 and 20, respectively. The lower end of the main operating rod 17 and the upper end of the lower main operating rod 17 face each other with a predetermined gap t.

Next, the operation of the device of the present invention will be explained. Before gas supply, the main and auxiliary gas valves 14 and 16 of the composite valve device 7 are closed.

First, when the manual cock 5 is opened, the gas flowing from the bypass passage 8 is stopped at the main gas valve 14, and the gas flowing from the gas passage 4 is stopped at the lowest flow hole 15 of the proportional control valve 6 and the auxiliary gas valve 16.
The pilot flame burner 2 is reached through the pilot flame burner 2, and is ignited.

Here, if the set temperature is high, the opening degree of the proportional control valve 6 is large, and therefore the auxiliary gas valve 1 is
Move 6 down to open.

At the same time, the operating rod 18 crosses the gap t to the main operating rod 17.
is pressed down by an amount corresponding to the above-mentioned gas pressure, the main gas valve 14 is opened according to the set temperature, and the main burner supplied with gas is opened.
1 is ignited and burned by pilot burner 2.

It then continues to burn to maintain the set temperature.

On the other hand, if the set temperature is low, the opening degree of the proportional control valve 6 is small, and therefore the lowering of the operating rod 18 of the auxiliary gas valve 16 is small, and the valve 16 is also slightly opened.

The movement of the actuating rod 18 is absorbed by the gap t and does not push down the actuating rod 17.

Therefore, in a range where the set temperature is low, combustion in the small-capacity pilot burner 2 is carried out proportionally.

This low temperature setting range is adjusted by the size of the gap t.

In this way, the gas heating device according to the present invention is provided with a main burner and an auxiliary burner that supply hot air to the heating chamber.The main burner is connected to the upstream side of the proportional control valve via the main gas valve, and the auxiliary burner is The downstream side of the proportional control valve is connected via an auxiliary gas valve, and the operating rods of the main gas valve and auxiliary gas valve are linked to keep the main gas valve closed in the low temperature range and adjust the auxiliary gas valve. Gas combustion can be performed up to high temperatures, and the function as a heating device can be improved.

In particular, by simply arranging the operating rods of both valves to face each other with a predetermined gap in the operating direction, the temperature ranges can be automatically made continuous, providing a very simple configuration.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of the gas heating device of the present invention, and FIG. 2 is an enlarged cross-sectional view of the main parts thereof. 1... Main burner, 2... Pilot burner, 6... Proportional control valve, 14... Main gas valve, 16...・Auxiliary gas valve, t...Gap.

Claims (1)

[Scope of utility model registration request] In a gas heating device in which a main burner and an auxiliary burner are provided in a heating chamber or a combustion chamber connected to this chamber, and a gas passage is connected to both burners, the opening degree of the passage is set in the heating chamber. A proportional control valve that adjusts according to temperature is provided, and the upstream side of this proportional control valve and the above-mentioned main burner are communicated via a normally closed main gas valve, and the downstream side of the proportional control valve and the above-mentioned auxiliary burner are communicated. 1. A gas heating device that communicates with each other via an auxiliary gas valve that guarantees a minimum flow rate, and in which the operating rods of both the main and auxiliary gas valves are arranged opposite to each other with a predetermined gap in the operating direction.