JPS6113538B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stove, and an object of the present invention is to improve the efficiency of heat exchange between an object to be heated and combustion heat (hereinafter referred to as thermal efficiency).

Conventionally, in a stove with multiple burners arranged around the same axis, when each burner is fired at the same time, the same amount of combustion is obtained as when each burner is fired individually, and the sum of the two burners is the same. Since the combustion amount becomes the combustion amount at that time, the ratio of the combustion amount to the pot surface area becomes large, which has the disadvantage that the thermal efficiency is lower than when each burner is burnt alone. .

The present invention solves the above-mentioned drawbacks by reducing the combustion amount of each burner or one of the burners when burning a plurality of burners simultaneously compared to when burning a burner alone. An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

In Figures 1 to 5, 1 is a gas stove, 2
is an ignition knob, 3 is a stove burner (combined burner A and burner B described later), 4 is a flame formed on burner 3, 5 is a trivet, and 6 is a pot installed on the trivet 5. . 7 is a nozzle A, 8 is a mixing pipe A facing the nozzle A, 9 is a burner A installed on the mixing pipe A8, 10 is a pressure equalization chamber A constituted by the mixing pipe A8 and burner A9, and 11 is a pressure equalization chamber A. Burner A9 A plurality of main flame holes A provided on a constant circumference,
12 is the main flame A formed in the main flame hole A11, 13 is the inner flame hole provided in the burner A9, 14 is the inner flame formed in the inner flame hole 14, 15 is the nozzle B, and 16 is opposed to the nozzle B15. Mixing tube B, 17 is mixing tube B16
18 is a pressure equalizing chamber B in the burner B 17, 19 is a main flame hole B provided in plurality in the axial direction on a constant circumference of the burner B 17, 20
is the main flame B formed in the main flame hole B19, 21 is the flame holding introduction hole provided in a part of the burner B17 to hold the main flame B20, 22 is the flame holding plate, and 23 is the burner B.
17 and a decompression chamber constituted by a flame holding plate 23, 2
4 is a flame holding hole with one side open to the decompression chamber 23, 25 is a flame holding hole formed in the flame holding hole 24, and 26 is an ignition knob 2.
27 is an opening provided in the nozzle 26, 28 is a gas supply port to the nozzle 26, 2
9 is provided inside the closure 27 and has one end connected to the gas supply port 28.
30 is a closure passageway A provided in the closure 27 and having one end opened to the closure entrance 29;
31 is passage A provided in Kotoku 26, 32 is passage A
31, an attachment port for nozzle B7 opened at one end;
33 is provided on the closure 27 and has one end connected to the closure entrance 29.
24 is a passage B provided in the closure 26, 35 is a closure passage C provided in the closure 27 and has one end open to the closure entrance 29, 36 is a passage C provided in the closure 26, 37 is a combustion amount adjustment orifice provided between the installation port 32 and the passage C36;
38 is a reduced portion of the orifice 37.

In the above configuration, when the ignition knob 2 of the gas stove 1 is turned, the closure 27 is rotated, and the gas flowing into the closure inlet 29 from the gas supply port 28 flows from the closure passage A30 to the passage A31, and is then attached to the gas stove 1. It flows into the mouth 32. After that, the gas is transferred to nozzle A7
When the gas is ejected into the mixing pipe A8, the gas attracts air, flows into the pressure equalization chamber A10, and is premixed with air to form a premixed gas. The premixed mixture is ejected from the main flame hole A11 and the inner flame 13 of the burner A9, and at the same time, the main flame 12 and the inner flame 14 are ignited by an igniter (not shown) linked to the ignition knob 2. They form and start burning. At that time, if the pot 6 is placed on the trivet 5, the pot 6 will be heated.

After that, if a large-capacity pot 6 is placed on the trivet 5, a strong flame is required, and when the ignition knob 2 is further turned and the closure 27 is turned, the closure 27 is in the state shown in Fig. 4 described above. As shown in FIG.
4 and is ejected from the nozzle B15 into the mixing pipe B16. On the other hand, the gas flowing into the passage C36 from the closed passage C35 flows from the combustion amount regulating orifice 37, which sets the minimum combustion amount of the burner A, through the reduction section 38, and then reaches the nozzle A7, where it enters the reduction section 38 from the above-mentioned combustion state. Therefore, burner A9 burns with a reduced amount of combustion. Also, the same result can be obtained by making the passage C36 smaller instead of the combustion amount adjusting orifice 37. On the other hand, the gas ejected into the mixing tube B16 is then premixed with air in the pressure equalization chamber B18, and ejected from the main flame hole B19 to form a main flame B20 to start combustion, and at the same time from the flame stabilizing introduction hole 21. The premixture flowing into the flame holding hole 24 forms a flame holding hole 25 and main flame B20.
flame-hold. This combustion state differs from the above-described combustion state in that the amount of combustion is smaller than in the state shown in FIG. 4 in which the burners A9 burn individually.

In general, the amount of heat received by the pot 6 is determined by the surface area of the pot 6, the temperature difference between the combustion gas temperature and the surface temperature of the pot 6, whether the flow state of the combustion gas is laminar or turbulent, and the flow rate of the flow at that time. Determined by the product of the overall heat transfer coefficient.

Now, when burner A9 and burner B17 are burned simultaneously and the amount of combustion of burner A9 decreases, the surface area of pot 6 does not change, but what changes is the amount of combustion gas determined by the amount of combustion. The second in this state
Figure 6 shows the combustion gas temperature distribution near the wall of the pot 6 in the X-Y section of the figure, and the figure shows that the difference in combustion amount depends on how far from the wall the high-temperature combustion gas flows. The highest value remains unchanged. Furthermore, even if the amount of combustion gas changes, the combustion gas flowing around the pot 6 spreads in the distance direction from the wall surface, so the flow velocity and flow conditions, laminar flow and turbulent flow, do not change. From this result, the temperature difference between the combustion gas temperature and the surface temperature of the pot 6 does not change, and the overall heat transfer coefficient also does not change. Therefore, the amount of heat received by the pot 6 does not change, only the amount of combustion decreases, and the thermal efficiency increases because it is a ratio of the two.

As described above, in the present invention, the thermal efficiency is increased by reducing the combustion amount of burner A9 when only burner A9 is burned and when burner A9 and burner B17 are simultaneously burned by using orifice 37. Also, if the size of the pot 6 changes and is small, only burner A9 can be burned, and if it is large, burner A9 can be burned.
By simultaneously burning the burner B17 and the burner B17, you can always select the burner that matches the size of the pot 6. This prevents the thermal efficiency from decreasing depending on the size of the pot 6, and when using a small pot 6, the handle of the pot 6 can be adjusted. It no longer burns, and on the other hand, when I made the pot 6 bigger,
The bottom of the pot 6 can be heated over a wide area. In addition, since the amount of combustion supplied to burner A and burner B is controlled by one pot, compared to the method of providing a pot for each burner and adjusting the combustion amount, one less pot is required, and the cost is low. Become. Also, since the amount of gas supplied to burner A is set by the orifice, by providing a stopper, positioning, etc. to the pot, it is possible to prevent the combustion amount from being reduced too much and extinguishing the fire. This makes the operation easier.

[Brief explanation of drawings]

FIG. 1 is a front view of a stove showing an embodiment of the present invention, FIG. 2 is a sectional view of the burner part of the stove of the present invention,
FIG. 3 is a cross-sectional view of the kettle of the present invention, FIGS. 4 and 5 are cross-sectional views showing the operating state of the kettle of the present invention,
FIG. 6 is a combustion gas temperature distribution diagram along the XY line in FIG. 2. 1... Stove, 3... Stove burner, 9... Burner A, 17... Burner B, 36... Passage, 37... Combustion amount adjustment orifice.

Claims (1)

[Claims] 1 In a stove where individual burners A and B are arranged on the same axis to form a set of stove burners, the gas supplied to the burners A and B is controlled by one stove, and combustion is performed simultaneously. What is claimed is: 1. A stove, characterized in that a combustion amount adjusting means for setting a bottom combustion amount is interposed in a path of gas supplied to at least one burner to adjust the combustion amount when the burner is heated.