Summary of the invention
The present invention is in order to address the above problem proposition, its objective is the cost of the assembling part that reduces pressure regulator, make the assembling operation high efficiency, with new being contemplated that at all, make the pressure regulator miniaturization, reach miniaturization, the lightweight of desk-top cooking device etc. thus.
The present inventor is in order to address the above problem, at first, modular construction to pressure regulator, and then assembling sequence inquired into, particularly drawn allow the valve of the opening end that is used to open and close jet pipe be structure as a whole, simplify its install, make thus the assembling operation high efficiency be very important, can make the conclusion of pressure regulator miniaturization thus.In addition, the problems that produce when a pressure regulator that constitutes is like this made miniaturization structure are analyzed, and the conclusion that draws is to reduce the diameter of barrier film in certain scope, performance to desk-top combustion gas cooking device does not have much losses, thereby has realized the present invention.
Therefore, the invention provides a kind of small pressure regulator, it is connected with the small gas container to regulate the gaseous-pressure of ejection, combustion gas is imported stilling chamber from jet pipe for this reason, under the effect of the barrier film that defines stilling chamber, make valve event, open and close jet pipe thus, after having regulated gaseous-pressure, combustion gas is flowed out outside stilling chamber, it is characterized in that, described small pressure regulator comprises body, the relative connection mouth of nozzle group valve with the small gas container that is arranged on this body side, be arranged on described intrinsic stilling chamber, in this stilling chamber, extend and be opened on jet pipe this stilling chamber from described connection mouth, valve with valve block of the opening end that can contact or leave described jet pipe, cover the barrier film of the opening of described stilling chamber, spring members from the effect of the behind of described barrier film, described valve is by the head with the valve block that is made of elastic material, 1 pin shape pin axle from this head extension, integrally formed from the outstanding galianconism shape fulcrum of this head on perpendicular to the direction of this pin axle, the pin axle of described valve cooperates with connected element, this connected element at one end with this barrier film in conjunction with and the other end can contact this stilling chamber the bottom surface and with described barrier film interlock, simultaneously, described galianconism shape fulcrum freely to rotate pivotal support on the body of this pressure regulator, and, the compression zone area S of described barrier film
2The area S of described relatively jet pipe opening portion
1Ratio S
1/ S
2Be decided to be 20 * 10
-4~50 * 10
-4
Further, in above-mentioned small pressure regulator, the combustion gas ejiction opening of small gas container and the fuel gas path of jet pipe are provided with the pressure sensing safety installations, cut off the inflow of combustion gas to jet pipe when from the gaseous-pressure abnormal ascending of small gas container ejection.In addition, the diameter of this barrier film is below 3.2cm.
In addition, in foregoing invention, barrier film is made of elastic material, in this barrier film and whole positions that body and lid contact, preferably is provided with the structure division that has as the sealed member function, and this is of value to the safety of utensil.In addition, in small pressure regulator, the internal diameter of jet pipe is that 0.08~0.12cm is proper, thus, can obtain the gas flow with the small pressure regulator same degree of using in the past, can realize interchangeability.
Description of drawings
Fig. 1 is an embodiment's of a small pressure regulator of the present invention side view.
Fig. 2 unloads plan view behind the lower cover from small pressure regulator shown in Figure 1.
Fig. 3 is the II-II sectional view of Fig. 2.
Fig. 4 is the IV-IV sectional view of Fig. 2.
Fig. 5 is the V-V sectional view of Fig. 2.
Fig. 6 is the sectional view of the combustion gas stream after expression pressure is regulated.
Fig. 7 is an embodiment's of a small pressure regulator of the present invention assembling exploded view.
Fig. 8 shows the barrier film that is used for small pressure regulator of the present invention, wherein, (a) is sectional view, (b) is planimetric map.
Fig. 9 is the valve mechanics explanatory drawing on every side that is used for small pressure regulator of the present invention.
Symbol wherein: the 10th, pressure regulator, the 11st, (die casting system) body, the 12nd, connection mouth, the 13rd, small gas container, 14 nozzle group valves, the 15th, (the assembling pressure sensor device) space, the 16th, jet pipe, the 17th, stilling chamber, the 18th, barrier film, the 19th, antagonism parts, the 20th, (or wall) upright face that the is provided with end of from, the 21st, valve block, the 22nd, valve, the 23rd, recess, the 24th, pin axle, the 25th, fulcrum, the 26th, secure component (screw), the 27th, connected element, the 28th, auxiliary section, the 29th, projection, the 30th, heavy section, the 31st, crushed element, the 32nd, ring-type mounting portion, the 33rd, interior sealed department, the 34th, outer seal portion, the 35th, lid, the 36th, (connected element can pass) hole, the 37th, fastening screw trip bolt, the 38th, pressing plate, the 39th, nut, the 40th, pressure sensing safety installations, the 41st, piston, the 42nd, spring assembly, the 43rd, preceding sealed department, the 44th, supporting base, the 45th, back sealed department, the 46th, jut, the 47th, nozzle valve seat, the 48th, utensil bolt, the 49th, fuel gas path, the 50th, back supporting base, the 51st, piston end.
Embodiment
Hereinafter, based on this first embodiment, present invention will be described in detail with reference to the accompanying.Fig. 1 shows the side view of small pressure regulator 10 of the present invention, and Fig. 2 unloads plan view behind the lower cover from small pressure regulator shown in Figure 1, and Fig. 3 is the II-II sectional view of Fig. 2, and Fig. 4 is the IV-IV sectional view of Fig. 2, and Fig. 5 is the V-V sectional view of Fig. 2.
As Fig. 1~shown in Figure 3, small pressure regulator 10 of the present invention, the body 11 with die casting system is by being used in the set connection mouth 12 in the side of the nozzle group valve 14 of small gas container 13 being inserted bodies 11.Pressure sensing safety installations 40 is provided with connection mouth 12 with being connected, and the jet pipe 16 that is in the top in the space 15 of assembling this pressure sensing safety installations 40 extends towards stilling chamber 17.
Stilling chamber 17 is structures of top opening, and this opening is covered by barrier film 18, as the behind effect from barrier film 18 of the spring members of the antagonism parts 19 of relative gaseous-pressure (secondary pressure).This stilling chamber 17 has the recess 23 that the end of from (or wall) uprightly is provided with the face 20 of jet pipe 16 and is used for pivotal support valve 22, valve 22 have can with the opening end contact of jet pipe 16, the valve block 21 that separates.
Valve 22 has and is roughly criss-cross plane shape as shown in Figure 2, and its head is provided with the valve block 21 that is made of elastic material.In addition, be provided with 1 pin shape pin axle 24, be provided with galianconism shape fulcrum 25 in the direction vertical with pin axle 24 at this head.These elements are configured as one by for example die casting, precision powder shaping etc., become the single structure body.Therefore, can omit operation in the past, also not need assembling procedure in head processing insertion fulcrum usefulness hole.
The fulcrum 25 of valve 22 inserts in the recess 23 set on the body 11 of pressure regulator as shown in Figure 7, thus, with recess 23 pivotal support valves 22, makes it be in free rotation state.In addition, this recess 23 also can form when making the body 11 of pressure regulator with methods such as for example die castings simultaneously.So, fulcrum 25 ends of inserting the valve 22 in the recess 23 set on the pressure regulator bodies 11, secure components such as available fastening screw trip bolt 26 location keep.By carry out the installation of valve 22 on pressure regulator bodies 11 in the manner described above, the operation that can omit the insertion of the fulcrum that carried out and prevent to come off in the past.
The pin axle 24 of valve 22 cooperates with the auxiliary section 28 of connected element 27.This connected element 27 extends towards above-below direction, and by supporting base 27a, pressing plate 38, nut 39 above it a side combine with barrier film 18, be in the state that can link with barrier film 18.In addition, the lower end side of this connected element 27 is provided with projection 29, and this projection 29 contacts with the face 20 of stilling chamber 17, is supporting barrier film 18, and it can be out of shape.
In the pressure regulator of the present invention, because valve 22 and the structure that is installed on its body rationalized as described above, therefore, have assembling procedure more in the past than the advantage of lacking, in addition, because structure is also fairly simple, thereby can dwindle its size dimension, can make the pressure regulator miniaturization.
But for the miniaturization of pressure regulator, the diameter that dwindles barrier film 18 is indispensable.In general, the barrier film 18 of the small pressure regulator that desk-top combustion gas cooking device is used, its diameter uses more in the past than the diameter that has enlarged 3.8cm degree (pressurized diameter 2.94cm).Its reason is, in order to ensure the stability of secondary pressure, and the stability of the secondary pressure when particularly guaranteeing a pressure oscillation.Therefore, if barrier film is not carried out miniaturization, the miniaturization of pressure regulator even the miniaturization of desk-top cooking device all will be restricted.To this, the present inventor inquires into to the influence that diaphragm diameter brings the pressure oscillation that a pressure oscillation causes, thinks, compares with conventional art, dwindles diaphragm diameter significantly and can not bring any loss to the function of desk-top combustion gas cooking device.
Fig. 9 is the mechanics explanatory drawing around the employed valve of pressure regulator of the present invention.As shown in Figure 9, suppose that from a pressure of jet pipe outflow combustion gas be P
1, jet pipe 16 the opening portion area be S
1, combustion gas secondary pressure be P
2, barrier film 18 compression area be S
2, valve 22 length be l
1(jet pipe side), l
2The load on spring of (barrier film side), antagonism parts is K, when the equalising torque around the fulcrum 25, has following formula to set up:
S
2P
2l
2=S
1P
1l
1+Kl
2
This formula arrangement is P
2The time, have following formula to set up:
P
2=(S
1P
1l
1+Kl
2)/S
2l
2
Give molecule, the denominator on this formula the right same divided by l
2, can obtain following formula:
P
2=(S
1/S
2)(l
1/l
2)P
1+K/S
2 (1)
Above-mentioned (1) formula shows the upset condition of the secondary pressure that a pressure oscillation causes.If show the opening portion area of jet pipe and the lever ratio (l of valve
1/ l
2) substantially constant, S
2Be the compression area of barrier film when dwindling, a pressure P
1Change make secondary pressure P
2Produce the situation of big change.But in the pressure regulator of the actual desk-top cooking device that uses, the diameter of jet pipe is about 0.1cm, and the diameter of barrier film compression zone is about 2.9cm, therefore, and (S
1/ S
2) be 9.37 * 10
-4Degree, very little.In addition, lever ratio (l
1/ l
2) be roughly 0.25~0.35 degree.Relative therewith, K/S
2Value be defined as the degree of the secondary pressure of combustion gas, for example 7.1kPa (0.073kgf/cm substantially
2).Therefore, though pressure as 49kPa (0.5kgf/cm
2) and 686kPa (7kgf/cm
2) between change, the variable quantity of this secondary pressure still is the degree of ignoring.If consider this relation, (S
1/ S
2), be that the ratio of the relative jet pipe opening portion of the compression zone area area of barrier film also can be 1/5 degree in the past.
The present invention utilizes this investigation result, if make the compression zone area S of barrier film
2Relative jet pipe opening portion area S
1Ratio (S
1/ S
2) be 20 * 10
-4~50 * 10
-4, lever ratio (l
1/ l
2) be 0.25~0.35, jet size is 0.8~0.12cm, then can dwindle the diameter of barrier film, and can obtain stable combustion condition.When above-mentioned condition was used in home-use desk-top combustion gas cooking device, the diameter of barrier film can be the pressurized diameter, and below 2.4cm (external diameter is 3.2cm), the internal diameter of jet pipe is 0.08~0.12cm, and lever ratio is 0.3~0.4.In addition, the pressurized diameter of barrier film can also dwindle, and still, this diameter is subjected to determining the condition K/S of gas secondary pressure
2Influence, therefore, its value too hour must be dwindled antagonism load K, in addition, when the material of barrier film is harder, can hinder the slyness distortion of barrier film, can not obtain stable secondary pressure, thereby its lower limit is preferably 1.3cm (external diameter is 1.5cm).This means that the rubber that constitutes barrier film should be soft as much as possible.
The size condition of barrier film 18 condition as described above is favourable to the miniaturization of pressure regulator, and is still as mentioned below, applies sealed member around being preferably in it.In other words, barrier film 18 have with thick wall part 30 that usefulness is installed on the middle mind-set connected element 27, the periphery at this center by the deformable crushed element 31 of pressure effect, and the ring-type mounting portion 32 of usefulness is installed on body 11 at the most peripheral of this crushed element 31.In this structure, be preferably in the part that contacts with the supporting base 27a of connected element 27 be provided with in sealed department 33, and the ring-type mounting portion 32 of body 11 and cover 35 between be provided with outer seal portion 34.These sealed departments utilize the flexible attribute of barrier film as tightness, and combustion gas is to the leakage of system outside in the time of can preventing the barrier film action effectively.
Interior sealed department 33 is set to a weight structure, and outer seal portion 34 is set to the inside and outside dual structure of concentric circles, and either party has the semicircle section of fin shape, can obtain and the same sealing effect of structure that encloses with O shape.In addition, interior sealed department 33 is arranged on the most inboard, prolongs along the hole 36 that connected element 27 passes, and therefore, compares with the structure in the past that projection is set on supporting base 27a, has improved sealing.Outer seal portion 34 contacts with the installation edge 35a of lid 35, and sealing state is kept in the fastening effect that is close to solid screw 37.Barrier film 18 is strengthened and the pressing plate 38 of accepting extrusion spring is installed on the connected element 27 by nut 39.
In pressure regulator of the present invention, also be assembled with pressure sensor device, for example, when pressure anomaly, as rising to (6kgf/cm above 588KPa
2) time, preferably cut off from the fuel gas supply of small gas container to burning portion.As long as this pressure sensor device can reach its purpose, any structure is all feasible, and it is provided with on the fuel gas path that the position is preferably in the combustion gas spout of small gas container and jet pipe.Concrete structure will be by hereinafter describing.
In other words, pressure sensing safety installations 40, be assembled in the space 15 of pressure regulator body 11, have piston 41, piston 41 can be along the axially reciprocating of connection mouth 12, and by the direction application of force of spring assembly 42 towards connection mouth 12, thus, under the state that does not connect small gas container 13, preceding sealed department 43 is pressed onto on the supporting base 44.In addition, piston 41 has back sealed department 45, and preceding sealed department 43 contacts with supporting base 44.Under the state of upper half part of Fig. 3, back sealed department 45 is in the rear of jet pipe 16.In other words, jet pipe 16 is between preceding sealed department 43 and back sealed department 45.
Piston 41 is provided with the jut 46 that contacts with the nozzle group valve 14 of small gas container 13 at the tip, piston 41 retreats into nozzle group valve 14 and nozzle valve seat 47 position contacting, and when preceding sealed department 43 left supporting base 44, combustion gas can spray.At this moment, the gaseous-pressure that is ejected into space 15 is a pressure, and combustion gas flows into to stilling chamber from jet pipe 16 under this pressure.The combustion gas that under a pressure, flows into, barrier film 18 and 19 pressure regulation of antagonism parts by a face that defines stilling chamber 17, make it become roughly certain secondary pressure, and the utensil bolt outside stilling chamber 48 flows, and further the fuel gas path 49 to Fig. 5, actuating parts such as firing chamber shown in Figure 6 flows.
At a pressure is under the normal situation, the film vibration of barrier film 18 moves up and down connected element 27, and only makes the open-ended portion of valve 22 switching jet pipes 16, therefore, above-mentioned gas flow can not be interrupted midway, can carry out pressure sleekly yet and regulate in stilling chamber 17.When a pressure anomaly rises, piston 41 can perceive this abnormal pressure, and overcome the elastic force of spring assembly 42 and retreat, sealed department 43 contacts with back supporting base 50 before making thus, shown in the Lower Half of Fig. 3 like that, cut off flowing of combustion gas, this state keeps by the end 51 of confined piston.This is the start of safety installations, removes above-mentioned constraint, proceed to readjust till.So, pressure regulator of the present invention, when a pressure anomaly of the combustion gas of flowing out from the small gas container is high, also can safe start.
More than, though based on one embodiment of the invention, the present invention has been made specific description,, form of implementation of the present invention is not limited to above-mentioned example, also goes for various forms of pressure regulators.
For example, in the above-described embodiments, though body is die casting,, also can use for example resin manufacture.In addition, in the scope that does not break away from above-mentioned technological thought, the present invention also is not limited to the described form of above-mentioned example, and its pressure, secondary pressure or a jet size can suitably change.Moreover the present invention also is applicable to and for example encamps with the pressure regulator of portable cooking device except home-use small-scale structure.
The present invention has adopted above structure, has following effect.Can cut down the process number of assembling pressure regulator significantly, reduce its cost.In addition, can make the pressure regulator miniaturization, thus, can make desk-top cooking device, encamp with small-sized, lightweights such as portable cooking devices by the present invention.Further, pressure regulator of the present invention can not change gas flow in essence, and can still use the cylinder type small gas container of current popular.