JPH0459526B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a catalytic combustion device using catalytic combustion heat as a heat source, which is used in general households and can be easily used without a power cord.

Structure of a conventional example and its problems A conventional catalytic combustion apparatus of this type was structured as shown in FIG. That is, in FIG. 1, the thermosensitive element 2 that has sensed the temperature of the combustion catalyst 1 expands and contracts, and the adjustment screw 4 for adjusting the set temperature attached to the control lever 3 and the control lever 3
The control lever 3 is biased by a spring 5 to drive a valve device 6 in contact with the control lever 3. In this case, by adjusting the gap between the valve device 6 and the sealing part 7, the flow rate of the vaporized fuel gas to be released is adjusted, thereby adjusting the calorific value of catalytic combustion.

However, in this configuration, since the control lever 3 for moving the valve device 6 is separately required, the configuration including this lever mechanism and the heat-sensitive response element 2 is inevitably smaller in size than the combustion catalyst 1. The problem was that it ended up becoming a big thing. Further, in this conventional configuration, a sealing gasket 6a provided on the bottom surface of the valve device 6 opens and closes the vaporized gas outlet 7a in the sealed portion 7, and the valve device 6 is connected to the control lever 3.
Since the control lever 3 and the valve device 6 are operated via the However, there was a problem in that the accuracy of temperature control was poor.

Purpose of the invention The present invention solves the above-mentioned conventional problems.
It is an object of the present invention to provide a catalytic combustion device in which a flow rate regulating valve can be opened and closed accurately without causing friction or twisting as in conventional devices.

Composition of the Invention In order to achieve the above object, the present invention has a passage having a nozzle at the tip of a flow rate adjustment valve controlled by a temperature control mechanism, and a ring-shaped sealing material is provided on the outer periphery of one end. Valve A is constantly biased by a spring in the direction of the nozzle, and this valve A
and a valve B which is slidably contained within the nozzle and is always biased by a spring in the direction of the nozzle, and the valve B is slidably installed in a cylindrical part through which the vaporized fuel gas passes, The other end of the inner pipe constituting the temperature control mechanism is brought into contact with the other end of the valve A, and the valve A is slid by the other end of the inner pipe, so that the O-ring and the valve B come into contact with each other. With this configuration, the flow rate adjustment valve is opened and closed on the same axis, so no resistance other than sliding friction is generated.
As a result, the movement becomes smooth and delicate movements of the temperature control mechanism can be reliably transmitted to the flow rate regulating valve, so that the flow rate regulating valve can be opened and closed accurately.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In FIGS. 2 and 3a and 3b, reference numeral 9 constitutes a handle portion, a tank 10 for storing liquefied fuel gas, and a battery 11.
An injection part 13 having a gas injection valve 12 is attached to the end of the tank enclosure 9, and a bottom cover 16 is attached to which a negative terminal 14 that contacts the negative terminal of the battery 11 is attached with screws 15. It is installed. Reference numeral 17 denotes a positive terminal that contacts the positive terminal of the battery 11. When the switch 18 is turned on, the heater contact 19 and the switch terminal 20 come into contact and energize the ignition heater 22 through the battery cover 21 connected to the negative terminal 14. be done.
23 is a lead wire of the ignition heater 22, and an insulating tube 24
covered by.

Further, the liquefied fuel gas stored in the tank 10 passes through the lamp wick 25 and is vaporized in the vaporizing section 26, and this vaporized fuel gas is transferred to the valve A27.
It is ejected from a nozzle 29 through a passage 28 provided in the. The vaporizing section 26 is constructed by press-fitting or caulking a porous material, such as sintered metal or ceramic, into the sealing tube 30. In this case, the vaporization section 26 may use a permeable membrane for vaporization.

Reference numeral 31 denotes a valve B that is located on the outer periphery of the valve A27 on the same axis and is slidably installed in a cylindrical portion 30a through which vaporized fuel gas passes, and the valve A27 is always connected to the nozzle by a coiled spring A32. It is biased in the direction of 29. Also valve A27
The airtightness between the valve B31 and the valve B31 is maintained by the O-ring A33, and the airtightness between the valve B31 and the vaporizing section 2
6 is maintained airtight by an O-ring B34.

The valve B31 is normally operated by a coiled spring B3.
5 in the direction of the nozzle 29, but when the switch 18 is off, the valve A27 is pressed toward the vaporizer 26 side by the lever 36 provided integrally with the switch 18, and the valve A27 is biased by the coiled spring A3.
2 in the direction of the nozzle 29, the O-ring C37 provided on the valve A27 comes into contact with the valve B31, and the gas vaporized in the vaporization section 26 is supplied to the nozzle 29. will be stopped.

Reference numeral 38 denotes an inner pipe made of a material with a small coefficient of thermal expansion. This inner pipe 38 is provided coaxially with the nozzle 29, and has a slit 39 for air intake at the end on the nozzle 29 side, that is, at one end. Further, the other end is sealed with a sealing screw 42 connected to the temperature setting knob 40 via a connector 41. Reference numeral 43 denotes a gas supply pipe provided coaxially with the inner pipe 38 and outside the inner pipe 38. This gas supply pipe 43 is made of a material with a large coefficient of thermal expansion, and its end on the nozzle 29 side is connected to the tank. It is fixed to the outer shell 9 and further includes a temperature setting knob 40.
The side end portion is screwed to the inner pipe 38 via a safety component 44 made of easily meltable metal.

Further, a gas distribution pipe 46 having a large number of holes is arranged in the gas supply pipe 43 via a collar 45,
Furthermore, a combustion catalyst 47 is arranged around the outer periphery of this gas distribution tube 46. Further, in a portion of the combustion catalyst 47 close to the ignition heater 22, an ignition confirmation catalyst 48, which is made of a particularly heat-resistant carrier and has a large amount of catalyst supported, is held by a holder 49 to constitute a catalytic burner section. There is. The outer periphery of this catalytic burner part has an appropriately opened exhaust hole, and
A heat transfer cylinder 50 made of a material with good thermal conductivity is provided with one end fixed to the tank shell 9, and the other end of the heat transfer cylinder 50 is sealed by a burner lid 51. Reference numeral 52 denotes a hair wrap portion having a protrusion 53 closely attached to the outer periphery of the heat transfer cylinder 50 . Further, the heat transfer cylinder 50 is provided with a translucent member 54 at a position facing the catalyst 48 for ignition confirmation, and a window 55 of the hair wrap section 52 opened directly above the translucent member 54 allows confirmation of ignition and combustion. The configuration is such that it is easy to check. 56 is a main body cover.

The operation in the above configuration will be explained. First, remove the main body cover 58, and then slide the switch 18 in the direction of the arrow to turn it on.
Since the lever 36 integrated with the lever 36 also moves in the direction of the arrow A, the valve B31, which had been pressed against the vaporizing section 26 side by the lever 36, is moved by the coiled spring B.
It is moved to the nozzle 29 side by the spring force of 35. At this time, the tip of the valve B31 hits the contact rib 57, and the valve A27 also moves in the direction of the arrow A due to the coiled spring A32 having a smaller elastic modulus than the coiled spring B35, so that the shoulder 58 at the tip on the nozzle 29 side touches the inner pipe. It is fixed against the end face of 38. As a result, the O-ring C37 of the valve A27 that was in contact with the valve B31 separates, so that the vaporized fuel gas vaporized in the vaporization section 26 is ejected from the nozzle 29 through the passage 28 of the valve A27. And from this nozzle 29 the inner pipe 3
The ejected gas ejected into the inner pipe 38 mixes with an appropriate amount of air sucked in through an air intake slit 39 provided in the inner pipe 38 to form a mixed gas. This mixed gas has a theoretical amount of air depending on the fuel gas used (for example, 30.9 times more for butane gas and 30.9 times more for propane gas).
However, in one embodiment of the present invention, in order to make the start of combustion smoother and faster, the air amount is slightly lowered. The slit 39 is provided so that the gas concentration increases.

The mixed gas passes through the inner pipe 38 and is ejected from the gas supply pipe 43 through a hole (not shown) provided at a location where the combustion catalyst 47 is located. and are distributed and supplied to the ignition confirmation catalyst 48. This distributed supply of gas starts almost at the same time as the switch 18 is turned on, so when the switch 18 is further slid in the direction of arrow A to bring the switch terminal 20 and the heater contact 19 into contact and the battery 11 is energized, the ignition heater 2
2 becomes red hot and combustion begins immediately. In this case, the holes in the gas distribution pipe 46 are appropriately opened so that more mixed gas is supplied to the ignition confirmation catalyst 48 than to the combustion catalyst 47.
The ignition confirmation catalyst 48 starts red-hot combustion more quickly than the combustion catalyst 47. Therefore, the combustion catalyst 47 can be easily checked visually from the outside through the transparent member 54.

When the combustion catalyst 47 starts combustion, the heat transfer cylinder 50 and the hair wrapping part 52 are heated and ready for use, but the temperature of the hair wrapping part 52 can be arbitrarily set with the temperature setting knob 40. can. That is, by turning the temperature setting knob 40, the inner pipe 38, which is screwed to the gas supply pipe 43,
The inner pipe 38 moves the valve A27 via the shoulder 58 of the valve A27, and the distance between the O-ring C37 of the valve A27 and the valve B31 shown in FIG. 3a, that is, the valve A27 is The relative position with valve B31 will be changed. This allows the temperature to be set.

Furthermore, since the gas supply pipe 43 and the inner pipe 38 are made of materials with different coefficients of thermal expansion, when the temperature rises due to the start of combustion, the gas supply pipe 43 with a larger coefficient of thermal expansion is replaced with the inner pipe with a smaller coefficient of thermal expansion. In order to pull up the pipe 38 in the direction of the burner lid 51 in a fixed state, the valve A27, which is biased by the coiled spring A32, also moves in the same direction. At this time, since the valve B31 is immovable by the contact rib 57, the O-ring C37 comes into contact with the valve B31, and as a result, the supply of the vaporized liquefied fuel gas is stopped. In this case, since the mixed gas is flowing in the inner pipe 38, the temperature increase due to combustion is almost eliminated by the cooling effect of the mixed gas, and as a result, temperature-sensitive control is possible. . When the supply of vaporized fuel gas is stopped, the temperature drops and
Since the gas supply pipe 43 tries to return to its original length,
Since the O-ring C37 separates from the valve B31 and the supply of vaporized fuel gas starts again, and combustion starts, the temperature can be automatically and continuously controlled at the set temperature.

In the above embodiment of the present invention, the temperature is automatically controlled relative to the set temperature by the method described above, so that it can be used at a stable temperature. A safety component 44 is provided to prevent burns or fire from occurring if the combustion catalyst 48 burns abnormally and the temperature rises too much. This safety component 44 is made of an easily melted metal, such as a Pb-Sn alloy, and is fixed to the gas supply pipe 43. However, the sealing screw 42 of the inner pipe 38 connected to the temperature setting knob 40 is screwed. They are screwed together. Further, the operating temperature of this safety component 44 can be arbitrarily set depending on the composition of the easily melted metal or alloy used.

Therefore, when the temperature rises due to abnormal combustion, the temperature of the gas supply pipe 43 rises abnormally and the safety component 44
melts. As a result, the inner pipe 38 comes off from the safety component 44, so the valve A27 is removed from the nozzle 2.
The coiled spring A32, which is biased toward the 9th side, is further stretched, and as a result, the valve A27 is lifted, and the O-ring C37 is pressed against the valve B31.
The supply of vaporized fuel gas is stopped.

Effects of the Invention As described above, according to the present invention, the flow rate adjustment valve controlled by the temperature control mechanism has a passage provided with a nozzle at the tip, and a ring-shaped sealing material is provided on the outer periphery of one end, and the nozzle It consists of a valve A that is always biased by a spring in the direction of the nozzle, and a valve B that slidably includes the valve A and is constantly biased by the spring in the direction of the nozzle. It is slidably installed in a cylindrical part through which fuel gas passes, and the other end of the inner pipe constituting the temperature control mechanism is brought into contact with the other end of the valve A, and the other end of the inner pipe Said valve A
The O-ring slides to control contact and separation between the O-ring and valve B. Since the flow rate adjustment valve is opened and closed on the same axis, no resistance other than sliding friction is generated. As a result, the movement becomes smooth and delicate movements of the temperature control mechanism can be reliably transmitted to the flow rate regulating valve, so that the flow rate regulating valve can be opened and closed accurately.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing a state in which a conventional catalytic combustion device is applied to a hair curler, FIG. 2 is a cross-sectional view showing a state in which a catalytic combustion device according to an embodiment of the present invention is applied to a cordless roll brush, and FIG. Figures a and b are enlarged sectional views of main parts showing operating states. 27... Valve A, 28... Passage, 29... Nozzle, 30a... Cylindrical part, 31... Valve B, 3
2... Valve A spring, 35... Valve B spring, 37... O ring, 38... Inner pipe, 43
...Gas supply pipe, 47...Combustion catalyst.

Claims (1)

[Scope of Claims] 1. A gas supply pipe for supplying a mixed gas of vaporized fuel gas and air to a catalyst that causes an oxidation reaction between vaporized fuel gas and air; It has a temperature control mechanism configured with an inner pipe fixed to a pipe, and a flow rate adjustment valve controlled by the temperature control mechanism, and the flow rate adjustment valve has a passage provided with a nozzle at its tip, A ring-shaped sealing material is provided on the outer periphery of one end, and a valve A is always biased by a spring in the direction of the nozzle, and the valve A is slidably contained therein and is always biased by the spring in the direction of the nozzle. The valve B is slidably installed in a cylindrical part through which the vaporized fuel gas passes, and the other end of the inner pipe is brought into contact with the other end of the valve A. A catalytic combustion device in which the valve A is slid by the other end of the inner pipe to control contact and separation between the O-ring and the valve B. 2 The elastic modulus of the spring that urges the nozzle A is
The catalytic combustion device according to claim 1, wherein the elastic modulus of the spring that biases the nozzle B is smaller than that of the spring that biases the nozzle B.