JPH0217255Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a gas stove that allows easy adjustment of firepower while restricting the gas flow rate.

Conventionally, in gas stoves used for gas stoves, etc., in order to reduce the firepower and use it in a so-called simmering state, you turn the operating knob connected to the closure to reduce the gas flow rate. Because the rate of change in gas flow rate with respect to angle is large, it may be difficult to obtain the desired firepower, such as if the flame is throttled too much and the flame goes out, making it necessary to restart the ignition operation. It was hot. There are also gas stoves that have a separate gas stove for adjusting the simmering temperature, which can be operated to adjust the firepower, but these have the problem of complicated piping and installation structures and high costs. It was hot.

The present invention was developed with the aim of solving these problems, and it includes a main flow path that passes through a gas flow path opening/closing switch and a thermal power adjustment switch in sequence, and a By forming a bypass path that branches off from the gas outlet and reaching the gas outlet without going through the regulating closure, and by using this bypass path as a bypass path to ensure the minimum flow rate, the fire will go out even if the gas flow rate is reduced too much. The opening/closing function and the heating power adjustment function for simmering are compactly integrated into one gas tank, and it is easy to adjust when the flame is simmering, and it is easy to set the desired firepower. This provides a gas tank that can be easily used in situations such as

Next, an embodiment of the present invention will be described with reference to the accompanying drawings. In the figure, 1 is the main body, 2 is a gas passage closure provided in the body 1, 3 is a thermal power adjustment closure provided in the body 1, 4 is a gas inlet, and 5 is a gas inlet. Gas entering from the gas inlet 4, which is a gas outlet, is sent out from the gas outlet 5 after passing through the opening/closing closure 2 and the adjustment closure 3 provided in series therewith. Reference numeral 6 indicates an operating shaft for operating the closing member 2, 7 indicates a mounting board fixed to the main body 1 with screws 8, 9 indicates a piezoelectric ignition element fixed to the mounting board 7, and 10 indicates pilot gas. By rotating the operating knob (not shown) attached to the operating shaft 6 in the axial direction, the opening/closing closure 2 is turned to the open position and the piezoelectric ignition element 9 is actuated to start the pilot. It is configured to ignite the gas and ignite a burner (not shown). These configurations are conventionally well known, and detailed explanations will be omitted.

The adjustment closure 3 is provided coaxially with the opening/closing closure 2 via the gas chamber 14, and the drive lever 15 is fixed with a screw 16, and the tip 15a of the drive lever 15 is It engages with a slit 17a at the tip of the adjustment lever 17. The adjustment lever 17 is rotatably supported by a pin 19 on a support plate 18 attached to the main body 1, and the adjustment closure 3 can be adjusted by moving and rotating the operating section 20 of the terminal. It rotates to adjust the gas flow rate.

FIG. 3 is a perspective view of the adjusting closure 3, in which gas holes 23, 24a, and 24b are bored in the conical surface.
The tip of the shaft portion 25 is a mounting portion 26 of the driving lever 15.
It is becoming. Gas hole 23 and gas holes 24a, 24
b correspond to different types of gas, and are provided at a certain angle, for example, as shown in the figure, the driving lever 15 is connected to the adjusting lever 17.
When the gas hole 23 is engaged with the slit 17a of
is combined with the gas outlet 5, and when the adjusting closure 3 is reversed and the driving lever 15 is engaged with the slit 17b of the adjusting lever 17, the gas holes 24a, 24
b is adapted to be combined with the gas outlet 5. Therefore, the gas hole 23 and the gas holes 24a, 24b
By appropriately selecting the size, shape, or position of the closing member 3, the same regulating closure 3 can be used as is for gases having different calorific values.

FIG. 4 shows a fixed cylinder 30 made of a rubber molded product having a conical inner surface 30a that fits the conical surface 3a of the adjusting closure 3. It is attached to the main body 1 in the adhered state. A rib 31 is formed on the outer periphery of the fixed cylinder 30, and is held so as not to rotate by engaging with a groove (not shown) provided on the body main body 1 side corresponding to the rib 31. 32 is a gas passage hole provided to coincide with the gas outlet 5. This fixed cylinder 30 is provided to improve the sealing performance on the conical surface 3a of the adjustment closure 3 and to ensure smooth rotation of the adjustment closure 3. There is almost no need to apply grease to the conical surface 3a. Therefore, in order to make the change in gas flow rate with respect to the rotation angle a desirable value, the slit portion 23a provided in the gas hole 23 and the small gas hole 2
There is no risk of grease clogging 4b, and reliability can be greatly improved. Note that the conical inner surface 30a of the fixed cylinder 30 is coated with Teflon or the like, or subjected to a surface treatment such as a satin finish to reduce the contact area and reduce the frictional force, so that the sliding movement of the adjusting closure 3 is prevented. Although the fixed cylinder 30 is designed to have good properties, the entire fixed cylinder 30 can also be made of a synthetic resin having good sliding properties and elasticity, such as Teflon.

Next, the configuration of the internal gas flow path will be explained with reference to FIGS. 5 and 6. In the figure, 35 is a needle insertion hole provided in the main body 1, and its tip is an opening 36 to the gas chamber 14 formed between the opening/closing closure 2 and the adjustment closure 3. Furthermore, a communication hole 37 that opens to the gas outlet 5 from the intermediate portion is provided. The needle insertion hole 35 has a female thread formed up to the middle part, and the needle 3 is inserted into this thread.
8 is screwed into the gas chamber 14 as shown by the arrow.
A bypass path 39 is constructed that extends from the gas outlet 5 through the opening 36, the needle 38, and the communication hole 37. In other words, this bypass path 39 does not pass through the adjustment closure 3, but is formed in parallel to the adjustment closure 3, and this bypass path 39 allows the adjustment closure 3 to be connected to the sixth adjustment closure 3. Even when it is in the closed state as shown in the figure, the gas flow path from the gas inlet 4 to the gas outlet 5 is maintained, the minimum flow rate set by the needle 38 is ensured, and the burner is prevented from extinguishing. It is. 40 is a main gas passage from the gas inlet 4 to the gas outlet 5 via the opening/closing closure 2 and the adjustment closure 3, as indicated by the arrow, and the bypass passage 39 described above is located in the gas chamber 14. It branches off from the main flow path 40 and joins again at the gas outlet 5. The gas flow rate is adjusted by keeping the opening/closing closure 2 fully open and rotating the adjustment closure 3, but rough adjustment can also be made by rotating the opening/closing closure 2. be able to. Note that the opening/closing closure 2 and the adjustment closure 3 are independent and have a structure that allows them to be rotated individually, but in this embodiment, the opening/closing closure 2 is in the fully closed state. , the protrusion 44 of the adjustment lever 17 is pushed by the interlocking lever 43 attached to the operating shaft 6, and the adjustment lever rotates toward the fully open side, fully opening the adjustment closure 3. Such an interlocking mechanism is provided so that the ignition operation is always performed with the adjusting closure 3 fully open, so that ignition can be easily performed.

In addition, in FIGS. 5 and 6, for convenience of explanation, the position of the needle insertion hole 35 is shifted and drawn on the same plane as the gas inlet 4 and the gas outlet 5. Further, in the figure, 45 is a mounting plate for the adjustment closure 3, 46 is a pressure spring for the adjustment closure 3, and 4 is a mounting plate for the adjustment closure 3.
7 and 48 are O-rings.

As is clear from the above-mentioned embodiments, the present invention provides a bypass path for ensuring the minimum flow rate that branches off from the middle of the main gas path and reaches the gas outlet without passing through the thermal power adjustment closure. The minimum flow rate is ensured even when the adjusting closure is fully closed, so there is no need to throttle the flame too much and extinguish the flame.
This has the advantage of making it easier to adjust the firepower. In addition, there is no need to ensure a minimum flow rate depending on the shape of the gas hole, such as by making a fine slit in the gas hole of the regulating closure, so it is easier to process, such as when making a fine hole in the conical surface of the closure. This method has the advantage that it is easy to manufacture the closure without any difficulty. Furthermore, since the flow rate control by the closure is performed by shifting the position of the gas hole, there is generally a limit to increasing the rotation angle of the closure, and opening/closing and adjustment can only be done with a single closure. If you try to perform both functions, the rotation angle that can be adjusted will be limited, making it difficult to finely adjust the gas flow rate and making it difficult to adjust the firepower in a simmering state. Since the present invention has two types of closures, one for opening/closing and one for adjustment, the required rotation angle can be made smaller than when the closure functions for both opening/closing and adjustment, and therefore the manufacturing of the closures is easier. This has the advantage that it is easy to use and the structure of the closing mechanism is simple. In addition, Fig. 7 shows an example of the change in gas flow rate with respect to the rotation angle of the closure, and the broken line indicates the case where opening/closing and adjustment are performed with one closure, and the gas flow rate in the portion where the gas flow is small is shown. The change in flow rate is large and it is difficult to adjust it in a simmering state.However, according to the present invention, it is easy to reduce the change in the part where the gas flow rate is small as shown by the solid line, and moreover, the minimum flow rate can be ensured. This makes the operation easier. In the figure, A indicates the range of the closed position, and B indicates the minimum flow rate. In addition, since the opening/closing closure and the adjustment closure are provided in one body, making the whole body compact, piping etc. are simplified, making it easier to integrate into gas appliances and reducing costs. It also has the advantage of being inexpensive. Furthermore, according to the present invention, since the rotation angle of the closure can be made small, several types of gas holes are provided in the adjustment closure, and by changing the direction of the adjustment closure, the gas hole to be used can be changed. This makes it possible to perform conversion work without replacing the closure when moving or switching to gas, improving the versatility of gas appliances, and also has the advantage of making it easier to handle different types of gas. There is.

[Brief explanation of the drawing]

Fig. 1 is a front view of an embodiment of the present invention, Fig. 2 is a partially cutaway side view of the same, Fig. 3 is a perspective view of the adjusting closure in the same, and Fig. 4 is a perspective view of the fixed cylinder. , FIG. 5 is a cross-sectional view of the same essential parts in the open state, FIG. 6 is a cross-sectional view of the same in the closed state, and FIG.
The figure is a characteristic diagram showing the relationship between the rotation angle of the closure and the gas flow rate. 1 is a body main body, 2 is an opening/closing closure, 3 is an adjustment closure, 4 is a gas inlet, 5 is a gas outlet, 38 is a needle, 39 is a bypass passage, and 40 is a main gas passage.

Claims (1)

[Scope of utility model registration request] An opening/closing closure and an adjustment closure are provided inside the body, each of which can be rotated individually and independently, and the main flow path from the gas inlet to the gas outlet is configured to pass through each of these closures in turn. At the same time, the gas tank is provided with a bypass passage for ensuring a minimum flow rate, which branches from the main flow passage between the opening/closing closure and the adjustment closure and reaches the gas outlet without passing through the regulation closure.