WO1991019943A1 - Gasbetriebenes gerät des persönlichen bedarfs, insbesondere lockenstab - Google Patents
Gasbetriebenes gerät des persönlichen bedarfs, insbesondere lockenstab Download PDFInfo
- Publication number
- WO1991019943A1 WO1991019943A1 PCT/DE1991/000468 DE9100468W WO9119943A1 WO 1991019943 A1 WO1991019943 A1 WO 1991019943A1 DE 9100468 W DE9100468 W DE 9100468W WO 9119943 A1 WO9119943 A1 WO 9119943A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas
- valve member
- operated device
- gap
- air
- Prior art date
Links
- 239000000203 mixture Substances 0.000 claims abstract description 29
- 239000000446 fuel Substances 0.000 claims abstract description 20
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 8
- 230000001105 regulatory effect Effects 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims description 16
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 claims description 12
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 239000001282 iso-butane Substances 0.000 claims description 6
- 235000000396 iron Nutrition 0.000 claims description 4
- 239000001273 butane Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 claims description 3
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 2
- 230000007704 transition Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 39
- 239000003380 propellant Substances 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
- B01F35/7179—Feed mechanisms characterised by the means for feeding the components to the mixer using sprayers, nozzles or jets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
- F23D14/64—Mixing devices; Mixing tubes with injectors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/10—Mixing gases with gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
- B01F25/3124—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow
- B01F25/31242—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow the main flow being injected in the central area of the venturi, creating an aspiration in the circumferential part of the conduit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/712—Feed mechanisms for feeding fluids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/75—Discharge mechanisms
- B01F35/754—Discharge mechanisms characterised by the means for discharging the components from the mixer
- B01F35/7547—Discharge mechanisms characterised by the means for discharging the components from the mixer using valves, gates, orifices or openings
- B01F35/75471—Discharge mechanisms characterised by the means for discharging the components from the mixer using valves, gates, orifices or openings being adjustable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/80—Forming a predetermined ratio of the substances to be mixed
Definitions
- the invention relates to a gas-powered device for personal use, such as curling irons, hair dryers, wax heaters or the like, with a jet pump and a small burner, in which a gaseous fuel, for example liquid gas or in particular isobutane, with the help of the jet pump with air mixed and the fuel / air mixture is conventionally burned with, for example, an open flame or catalytically, the fuel flows through a throttle gap of adjustable gap which is provided on the upstream section of a valve member, a driving nozzle for forming a free jet on the downstream section of the valve member and with a catch nozzle body located downstream of the driving nozzles.
- a gaseous fuel for example liquid gas or in particular isobutane
- Gas-operated devices are understood to mean, for example, curling irons, wax heaters, hair dryers, soldering irons, bottle warmers, lighters and the like, which mix a gaseous fuel, for example liquid gas and in particular isobutane, with air using a jet pump and conventionally or in particular also downstream of the mixing point burn catalytically.
- a gas-operated device of the type mentioned at the outset is already known from EP 0021 224 B1, the content of which is included in the disclosure content of the present application by express reference.
- a mixing tube designed as a venturi nozzle connects downstream of the driving nozzle.
- This catch nozzle body is funnel-shaped at its upstream end with an inlet opening which is considerably larger in relation to the diameter of the valve member. This measure is intended to improve the air entry into the mixing tube and the mixture formation. Low Axial displacements of the valve body with respect to the catching nozzle body play no role for the amount of air entrained by the free jet.
- One problem is that a different mixture composition is required to ignite the mixture than when operating in the nominal load or part load range.
- the invention is based on the problem of further developing a gas-operated device for personal use with a small burner of the type mentioned at the outset such that the mixing ratio (air volume flow / gas volume flow) can be largely adapted to the required theoretical or ideal profile.
- This problem is solved in the gas-powered device of the type mentioned in that an upstream end wall of the catching nozzle body and a downstream end wall of the valve member can be adjusted to a further throttle gap Form the gap width through which the air entrained by the free jet can flow.
- the ignition safety of the device is not impaired by this measure, in particular a device equipped with a combustion catalytic converter can be started without problems by means of a short ignition explosion.
- the upstream end wall of the trap nozzle body of the jet pump and the downstream end wall of the valve member, which in this case forms the propellant nozzle body and, as mentioned, is displaceable with respect to the trap nozzle body, are preferably designed and dimensioned such that at full ge ⁇ opened valve, the cross-section between the two end faces becomes so small that despite the high throughput of the fuel through the driving nozzle, only a relatively small amount of air is entrained by the preferably annular throttle gap between the two end walls. This enables a rich, easily ignitable mixture to be reached, for example during the starting phase.
- the end walls are arranged and dimensioned with respect to one another such that the gap width of the throttle gap is limited at least in one end position of the valve member in such a way that, despite the high gas throughput through the propellant nozzle, a relatively small amount is obtained through the preferably ring shaped throttle gap and is entrained by driving jets. This promotes in particular the ignition behavior of the device in the starting phase, in which a rich mixture is desired.
- An advantageous development of the invention consists in setting the ratio of the gap widths of the throttle gap in the two end positions of the valve body to be greater than two and in particular greater than four.
- the formation of the throttle gap for the air flow is structurally particularly simple in that the end faces of the catching body and the valve member essentially completely overlap one another. lapping and are arranged in substantially parallel planes to each other.
- the smallest width of the throttle gap is determined by a stop on at least one of the end walls. This ensures that the throttle gap for the air flow, in contrast to the throttle gap for the gas flow, cannot be closed completely, so that a minimal air flow is always entrained by the free jet during operation of the device.
- At least three stops are provided in the form of strips which form an angle with respect to the radial extent of the end faces, so that the inflowing air receives a speed component in the circumferential direction.
- Rounding the outer edges of the end face and the inner edges in the transition area between the end face and the mixing tube reduces the risk of detachments, which can lead to unstable, periodically fluctuating flow conditions.
- the widths of the two throttle gaps are caused by an axial displacement of the valve member. This can be changed in the opposite direction, so that a mixture course can be set in a structurally extremely uncomplicated manner as a function of the gas volume flow set in each case, which is largely approximated to the theoretical or ideal conditions.
- the axial displacement of the valve member can preferably be carried out in a temperature-controlled or regulated manner by means of a temperature detection element which is assigned to the combustion chamber of the device.
- a time-controlled or -controlled actuation of the valve member for varying the fuel / air mixture proves to be extremely advantageous, in particular if temperature control is dispensed with.
- the user of the device can, for example, operate or move the actuating means in a timed manner in the required manner after switching on the device.
- FIG. 1 shows a schematic diagram of the course of the gas mixture as a function of the gas mass flow, the ideal course, the course previously realized by known devices and the course generated according to the invention being compared;
- FIG. 2 shows a section through the jet pump according to the invention, the position of the valve member at nominal power being shown in FIG. 2A and the position of the valve member at ignition power being shown in FIG. 2B.
- the ideal, real, and achievable mixture ratios according to the invention are shown schematically in FIG. 1 as a mixture ratio (air volume flow / gas volume flow) over the gas mass flow.
- Curve 2 shows the desired ideal course: With increasing gas mass flow, the mixture becomes "richer”, i.e. gas-rich. In order to be able to ignite safely, an appropriately rich mixture must be supplied in the start phase (2) of the device.
- curve 4 which has been achievable so far and which is favorable in the nominal load range (N) is shifted to small burners by supplying an excessive amount of gas according to curve 6.
- a profile according to curve 8 is achieved which approaches curve 4 for small gas mass flows (S) and ideal curve 2 for large gas mass flows (Z).
- FIG. 2A A jet pump (10) designed according to the invention is shown in FIG. 2A in the position in the nominal load mode (N) and in the half designated with FIG. IB in the position ignition or starting mode (Z).
- gaseous fuel comes from a container (not shown) through a channel 18 in the direction of arrow 58 to the valve member 14 which is in a bore 16 with an adjoining chamber 24 is axially displaceably received in the housing part 12 along an axis 21.
- gas gas
- the valve body 14 has a blind hole 20 which is connected to the outer jacket of the valve body 14 and the chamber 24 surrounding the jacket via at least one further bore 22 running transversely to it.
- valve body 14 When the valve body 14 is open, the gas can flow through this chamber 24, which also receives a valve closing spring 28, and the bores 20 and 22 to the downstream end of the valve body 14.
- a sealing ring 26 between the valve body 14 and the bore 16 ensures sufficient sealing so that no gas can escape at this point.
- a throttle gap 34 for the gas volume flow is formed between the bottom 30 of the chamber 24 and the valve plate 32, the width of which can be varied by an axial displacement of the valve body 14.
- An insert 36 is provided at the downstream end of the valve body 14, which closes the blind hole 20 except for the driving nozzle 38. It is of course possible to provide the blind hole 20 as a through hole and to insert the insert 36 at one end and the valve divider 32 at the other end.
- the gas flows through the driving nozzle 38 into the catching nozzle body 44, which has an end wall 46 and a centrally arranged mixing tube 50, and, as is customary in jet pumps, entrains air from the area outside of this free jet.
- the axial distance a between the wall 40 of the valve member 14 and the end wall 46 of the catching nozzle body 44 is now preferably small and their overlap in the radial direction is chosen to be large. End walls 40, 46 arranged and designed in this way are usually avoided or efforts are made to arrange them with the greatest possible distance in the axial direction and to achieve the smallest possible radial overlap. Otherwise, the end walls 40, 46 are arranged essentially in parallel planes to one another. As a result of this extremely advantageous measure, the throttle gap 54 between the end walls 40, 46 actually functions as a throttle for the air flow indicated by the arrows 60.
- stops 52 are provided on one of the two end walls 40, 46 which define the smallest adjustable width a 'of the throttle gap 54. It is also possible to design these stop bodies 52 as strips which preferably enclose an angle other than zero with the radial direction, so that the inflowing air receives a velocity component in the circumferential direction. This measure makes it possible to improve the mixing ratio, in particular in the case of small gas mass flows, since the gas jet emerging from the driving nozzle becomes turbulent more quickly, which increases the delivery rate.
- the radially outer edges 42 of the end wall 40 of the valve member 14 and the radially inner edges 48 of the end wall 46 of the collecting nozzle body 44 are preferably rounded off in order to reduce the risk of detachments. Such detachments can lead to unstable, periodically fluctuating flow conditions, through which the composition of the gas / air mixture also changes periodically, which can even lead to the termination of the combustion process.
- the calorific power of burners in which the invention is typically applicable is 50 to 100 watts, butane or isobutane is to be mentioned as the fuel.
- the gas mass flow is 1-2 mg / s; the mixing ratio air / gas (vol./vol.) is about 35 at 1 mg / s and about 25 at 2 mg / s.
- the diameter d of the mixing tube 50 through which the fuel / air mixture 62 flows is approximately 1.5 mm, the valve stroke h approximately 0.4 mm and the distance a fluctuates between 0.1 and 0.5 mm depending on the current status of the valve.
- the radii of the rounded edges 42, 48 are 0.6 mm.
- the ideal mixing ratio must be changed according to the stoichiometric ratio; a larger mixing ratio requires a larger mixing tube diameter d and a correspondingly larger distance a.
- the control is carried out as before by adjusting the valve.
- This can be positively guided via actuating means 56 such as bolt linkages, screws, etc. or it is pressure-controlled under the action of the pressure of the gas 58, a higher pressure of the gas 58 causing the nozzle body to be lifted from the valve seat to a greater extent.
- the control mechanism with which the Desired power can be set act on the end of the spring 28, which rests in the illustrated embodiment in the chamber 24 on the housing part 12.
- the actuating means 56 can be acted upon particularly advantageously by a time-controlled or temperature-controlled control or regulation, so that the mixture can be set as a function of the operating state of the device.
- the invention is not limited to the exemplary embodiment shown, but can be varied in various ways. It is essential that, when the stroke of the valve body 14 is varied and the width h of the throttle gap 34 is changed, the width a of the throttle gap 54 takes into account a noticeable change in the radial overlap of the two end walls 40, 46 amount of air conveyed.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Feeding And Controlling Fuel (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT126890 | 1990-06-11 | ||
ATA1268/90 | 1990-06-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1991019943A1 true WO1991019943A1 (de) | 1991-12-26 |
Family
ID=3510211
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1991/000468 WO1991019943A1 (de) | 1990-06-11 | 1991-06-04 | Gasbetriebenes gerät des persönlichen bedarfs, insbesondere lockenstab |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0486640A1 (de) |
JP (1) | JPH05501149A (de) |
CA (1) | CA2064849A1 (de) |
WO (1) | WO1991019943A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110015736B (zh) * | 2019-05-05 | 2021-10-29 | 安徽理工大学 | 一种组合式粉状絮凝药剂定量添加及分散混合系统 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0021224B1 (de) * | 1979-06-11 | 1987-08-12 | The Gillette Company | Haarbehandlungsvorrichtung mit einer im Bereich des Haarwickelabschnitts vorgesehenen katalytischen Heizeinrichtung |
-
1991
- 1991-06-04 JP JP3509881A patent/JPH05501149A/ja active Pending
- 1991-06-04 EP EP91910416A patent/EP0486640A1/de not_active Withdrawn
- 1991-06-04 WO PCT/DE1991/000468 patent/WO1991019943A1/de not_active Application Discontinuation
- 1991-06-04 CA CA002064849A patent/CA2064849A1/en not_active Abandoned
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0021224B1 (de) * | 1979-06-11 | 1987-08-12 | The Gillette Company | Haarbehandlungsvorrichtung mit einer im Bereich des Haarwickelabschnitts vorgesehenen katalytischen Heizeinrichtung |
Also Published As
Publication number | Publication date |
---|---|
EP0486640A1 (de) | 1992-05-27 |
CA2064849A1 (en) | 1991-12-12 |
JPH05501149A (ja) | 1993-03-04 |
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