JPH08200689A - Gas cooking appliance - Google Patents

Abstract

PURPOSE: To provide a gas cooking appliance in which the energy conservation and the environmental improvement in a kitchen are conducted by avoiding waste gas combustion as much as possible. CONSTITUTION: A gas cooking appliance 1 comprises a pot detecting sensor 31 for detecting whether a pot 3 exists on a grate 5 or not, an automatic switching valve 7 provided at a gas supply tube 15 to a burner 7, and a bypass tube 19 in which a gas flow rate is throttled to bypass the valve 17. Further, the appliance 1 comprises control means 35 for so controlling that the valve 17 is opened when the pot 3 exists on the grate 5 or closed when the pot 3 is not existed on the grate 5. When the pot 3 exists on the grate 5, the gas of the flow rate adjusted by a cook is supplied to the burner 7, while when no not 3 exists on the grate 5, the gas of the flow rate reduced to the minimum limit is supplied.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas stove used in a kitchen at home, a kitchen in a restaurant or the like. In particular, it relates to a gas stove that avoids wasteful gas combustion as much as possible and contributes to energy saving and environmental improvement in the kitchen.

[0002]

2. Description of the Related Art A gas stove is a device that cooks by heating the pot with the flame and exhaust gas of the gas burned in the burner, with a pot and a frying pan (hereinafter referred to as a pot) placed on the pot Is.

FIG. 3 is a schematic sectional view showing the structure of a typical gas stove that has been conventionally used. A pot 3 is placed on the Gotoku 5 of the gas stove 1 ″. A flame is emitted from the burner (burner head) 5 below the Gotoku 5
The flame hits the bottom of the pot 3.

A typical gas stove burner is a so-called Bunsen burner. Gas burned in the burner head 7 (city gas, propane gas, etc.) is blown into the mixing pipe 9 from the gas supply pipe 15 through the nozzle 11. Nozzle 1
A primary air hole 13 is provided around 1, and air is sucked into the mixing tube 9 through the primary air hole 13. The sucked air is called primary air and mixes with the gas in the mixing tube 9.

The gas supply pipe 15 is provided with a gas cock 23 for manually controlling the amount of gas.
The cock 23 controls the heating power of the burner. In addition to the illustrated devices, there is also a gas stove having an ignition device (piezoelectric ignition type) and an extinguishing safety device (temperature detection type, etc.).

[0006]

During cooking, the pan is sometimes separated from the stove by seasoning or serving. If the cock is not manually throttled at this time, the burner combustion amount remains the same as before. Therefore, wasteful use of gas and deterioration of the environment in the kitchen occurred.

Particularly in commercial kitchens, these problems cannot be ignored because the cooking amount is large and the work is too busy to adjust the fire one by one.

It is an object of the present invention to provide a gas stove that avoids wasteful gas combustion as much as possible and contributes to energy saving and environmental improvement in the kitchen.

[0009]

In order to solve the above-mentioned problems, a gas stove according to the present invention is a gas stove provided with a gas burner and Gotoku supporting a pot bottom on the burner; the pot is present on Gotoku. A pan detection sensor for detecting whether or not it is, an automatic opening / closing valve provided in a gas supply pipe to the burner, a bypass pipe bypassing the automatic opening / closing valve and having a relatively narrow gas flow rate, and a pot on the Gotoku The control means for controlling the automatic opening / closing valve to open when it exists, and the automatic opening / closing valve to close when it does not exist.

Further, a gas stove according to another aspect of the present invention is
A gas stove comprising a gas burner and a Gotoku supporting the pot bottom on the burner; a pan detection sensor for detecting whether or not a pot is present on the Gotoku, and a gas supply pipe on the burner. It is characterized by comprising a flow rate control valve and a control means for controlling the flow rate control valve so as to be narrowed to a minimum when no pan is present on Gotoku.

[0011]

In the gas stove of the present invention, when the pot is present on Gotoku, the gas flow rate adjusted by the cooker is supplied to the burner. And when there is no pot on Gotoku, the minimum flow rate is supplied. Means therefor are a combination of an automatic opening / closing valve and a bypass pipe, and a flow control valve. Therefore, when the cook removes the pot from the stove, the flame of the burner is automatically squeezed, and when the pot is put back on the stove, the flame automatically returns.

[0012]

Embodiments of the present invention will be described below. Figure 1
It is a typical sectional view showing the structure of the gas stove concerning one example of the present invention. Similar parts to those of the conventional gas stove shown in FIG. 3 are designated by the same reference numerals. The gas stove shown in FIG. 1 has the same basic burner structure as that of the conventional gas stove shown in FIG.

That is, a pot 3 is placed on the Gotoku 5 of the gas stove 1. A flame comes out from the burner (burner head) 5 below the Gotoku 5, and the flame hits the bottom of the pot 3. Gas burned in the burner head 7 (city gas,
Propane gas or the like) is blown into the mixing pipe 9 from the gas supply pipe 15 through the nozzle 11. A primary air hole 13 is provided around the nozzle 11, and the primary air hole 13
Air is sucked into the mixing tube 9. The sucked air mixes with the gas in the mixing tube 9. The gas supply pipe 15 is provided with a gas cock 23 for manually controlling the amount of gas. The cock 23 controls the heating power of the burner.

The gas stove 1 shown in FIG. 1 is characterized by a pan detection sensor 31, a control means 35, a bypass pipe 19, and an automatic opening / closing valve 1.
7 is provided. The pan detection sensor 31 is
It is installed near Gotoku 5 on the stove top plate 33 and detects the presence of a pot on Gotoku 5. As the pan detection sensor 31, various types of sensors such as an optical type and a contact type can be used.

The automatic opening / closing valve 17 is a remote automatic operation valve such as an electromagnetic valve, and is provided on the stove side of the cock 23 in the main pipe of the gas supply pipe 15. Further, a bypass pipe 19 is provided so as to bypass the front and rear of the automatic opening / closing valve 17. The bypass pipe 19 is provided with a throttle 21 so that the flow rate of the gas passing through the bypass pipe 19 is set to a necessary minimum.

In the gas stove shown in FIG. 1, when the automatic open / close valve 17 is open, the gas burner is supplied with gas at a flow rate adjusted by the cock 23, and when the automatic open / close valve 17 is closed, it passes through the bypass pipe 19. The minimum flow rate is provided.

The pan detection sensor 31 detects whether or not the pan 3 is in Gotoku and sends a signal to the control means 35. When the control means 35 determines that the pan 3 is not present, the automatic opening / closing valve 17
Closed, and when it is determined that there is pot 3, automatic opening / closing valve 17
To open. Therefore, when the pan is removed from the stove during cooking, the gas supply to the burner is minimized and the flame of the burner is automatically throttled. When the pan 3 is returned to the stove, the gas supply to the burner is set by the cock 23. It returns to the value (adjusted by the cook) and automatically restores the burner flame.

FIG. 2 is a schematic sectional view showing the structure of a gas stove according to another embodiment of the present invention. Portions similar to those of the gas stove in FIG. 1 are designated by the same reference numerals.

In the gas stove shown in FIG. 2 as well, as in the gas stove shown in FIG. 1, a pan detecting sensor 31 'is placed in the vicinity of Gotoku 5. However, the configuration of the gas supply pipe 15 is different. That is, in this embodiment, the gas supply pipe 15 is provided with the flow rate control valve 41. The flow rate control valve 41 has a function of adjusting the gas flow rate of the gas supply pipe 15 in accordance with a command from the control means 35 '(or an indirect command from the cook).

The control means 35 'receives a signal from the pan detection sensor 31' and judges whether or not the pan 3 is present. And pot 3
If it is determined that the gas flow rate does not exist, the flow control valve is automatically throttled to minimize the gas flow rate. When it is determined that there is the pan 3, the flow control valve is returned to the original setting. Therefore, when the pan is removed from the stove during cooking, the gas supply to the burner is minimized and the flame of the burner is automatically throttled. When the pan 3 is returned to the stove, the gas supply to the burner is set by the cock 23. It returns to the value (adjusted by the cook) and automatically restores the burner flame.

[0021]

As is apparent from the above description, in the gas stove of the present invention, the amount of gas burned is automatically minimized when the pan is removed from the stove during cooking. This improves the practical efficiency of the stove and improves the running cost merit. Further, since the combustion of unnecessary gas can be suppressed to the minimum, the environment inside the kitchen can be improved.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing the structure of a gas stove according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view showing the structure of a gas stove according to another embodiment of the present invention.

FIG. 3 is a schematic cross-sectional view showing the structure of a typical gas stove that has been conventionally used.

[Explanation of symbols]

 1 Gas Stove 3 Pan 5 Gotoku 7 Gas Burner 9 Mixing Pipe 11 Nozzle 13 Primary Air Vent 15 Gas Supply Pipe 17 Automatic Open / Close Valve 19 Bypass Pipe 21 Restrictor 23 Cock 31 Pan Detection Sensor 33 Top Plate 35 Control Means 41 Flow Control Valve

Claims (2)

[Claims] 1. A gas stove comprising a gas burner and a Gotoku supporting a pan bottom on the burner; a pan detection sensor for detecting whether or not a pan is present on the Gotoku, and a gas supply to the burner. An automatic opening / closing valve provided in the pipe, a bypass pipe with a relatively narrow gas flow rate bypassing the automatic opening / closing valve, an automatic opening / closing valve opening when a pot is present on Gotoku, and an automatic opening if not A gas stove comprising: a control unit that controls to close the on-off valve. 2. A gas stove comprising a gas burner and a Gotoku supporting a pan bottom on the burner; a pan detection sensor for detecting whether or not a pan exists on the Gotoku, and a gas supply to the burner. A gas stove comprising: a flow control valve provided on the pipe; and a control means for controlling the flow control valve to be narrowed to the minimum when no pan is present on Gotoku.