KR101325880B1 - Improved cooking gas burner - Google Patents

Abstract

The present invention includes a dispenser (30), a gas manifold (50) and a cup (40), wherein the cup (40) is located between the gas manifold (50) and the dispenser (30). A gas burner assembly is provided. The present invention also provides an assembly method for assembling the dispenser 30 and the cup 40 in a cooking gas burner assembly, the method comprising the steps of providing the dispenser 30 with a spigot 32 extending downward. Providing the cup 40 with a recess 48 for receiving a thing 32, the recess 48 comprising a base surface 246, the recess 48 The size and / or shape of the submerged material may be such that thermal expansion of the dispenser 30 results in an increase in the contact surface between the cup 40 and the dispenser 30 when the dispenser 30 is hot. It is set not to. In addition, the present invention includes at least a cap 220 and a distributor 30 to which the cap 220 is mounted, the distributor 30 comprising an inner tube portion and an outer tube portion of the flame port and one between these tube portions. There is a cross lighting passage 37, wherein the cap 220 includes an air opening 222 which is arranged to be positioned above the cross lighting passage 37 when the cap 220 and the distributor 30 are assembled. It provides a cooking gas burner assembly. Finally, the present invention includes a dispenser 30 and a first forming portion for supporting the dispenser 30 in the assembly, wherein the dispenser 30 and the first forming portion are formed by the first forming portion and the dispenser 30. And a scoop 32 and a recess 48 so that the recess 48 has a thermal expansion of the dispenser 30 when the dispenser 30 is hot. It provides a cooking gas burner assembly comprising a surface that is set in size and / or shape so as not to substantially increase the area of contact between the first formation and the distributor 30.

Description

Cooking gas burner {IMPROVED COOKING GAS BURNER}

The present invention relates to an improved cooking gas burner that can be formed as part of a cooking hob or detachable to a cooking hob.

After the cooking gas burner is ignited, the feed gas to the burner is heated. This heating of the feed gas is not intentional and results in a reduction of the gas flow to the burner and thus reduces the power delivered by the burner. This result is evident whether or not the gas is premixed with the primary air. The degree of power loss is mainly related to the temperature of the gas flowing into the burner.

The present invention provides a cooking gas burner assembly comprising a distributor, a gas manifold and a cup located between the distributor and the gas manifold.

The distributor may comprise means for mixing primary air and feed gas.

The distributor may have an air opening therein which allows primary air to be sucked into the mixing means.

The cup may form a lower surface of the passageway allowing primary air to be sucked into the mixing means.

The gas manifold may be spaced apart from the cup.

The gas manifold and cup may be spaced apart from each other by pillars extending vertically between the gas manifold and the cup.

The pillar may comprise a wall of one or more passages pointing upwards from the gas manifold through which the gas manifold delivers feed gas to the mixing means.

The minimum gap between the gas manifold and the cup is about 5 mm.

The contact area of the dispenser with the cup and / or hob is between 5 and 20 mm 2.

The dispenser may comprise a skirt around the skirt, the skirt comprising the air opening, the lower edge of the air opening being provided with the cup.

The portion of the skirt that does not include the air opening is the portion of the sub-assembly that does not contact the cup. These portions are spaced about 5-20 mm from the cup.

The gas manifold may have a two member structure.

The gas manifold may have a body portion having a generally planar structure.

An insulating member is provided at the contact position between the dispenser and the cup and / or the contact position between the cup and the gas manifold.

The cup may provide a means for securing the cooking gas burner to the hob. Alternatively, the cup may be integrally formed with the hob of the cooking utensil.

The dispenser may include a spigot extending downward to engage the cup.

The spigot may terminate with one of a point, a plane, or a portion of a sphere.

The cup may include a recess for receiving the spigot.

The recess or spigot is shaped such that the contact area of the cup and the dispenser does not substantially change when the size of the dispenser changes due to thermal expansion.

The recess may be an elongate shape. The elongate shape may have a longitudinal axis substantially positioned on or substantially parallel to the virtual radius emerging from the center of the burner.

The recess may be elliptical in cross section.

The recess may have an elongate and generally horizontal base surface, which base surface is generally the same shape as the recess.

The recess and the spigot may each have a tapered structure.

The recess may have a shallower taper than the spigot.

The spigot is slidable over the surface of the cup.

The present invention also provides an assembly method of assembling a dispenser and a cup in a cooking gas burner assembly, the assembly method comprising providing the dispenser with a downwardly extending spigot and a recess for receiving the spigot. Providing the cup, wherein the recess includes a base surface, wherein thermal expansion of the dispenser substantially increases the contact area between the cup and the dispenser when the dispenser is hotter than when the dispenser is cold. The size or shape of the recess is set so as not to cause.

The assembly method allows a support surface on which the distal end of the spigot is slidable to be provided on the base surface.

The recess may be an elongate or elliptical whose longitudinal axis or major axis lies generally radially with respect to the center of the dispenser.

The present invention also provides a gas burner assembly having a cap and at least a dispenser with the cap mounted thereon, the dispenser having at least one cross between the inner and outer tubes of the flame port and between these tubes. A cross lighting passage, the cap including an air opening, the air opening being positioned above the cross lighting passage when the cap and distributor are assembled.

An air opening through the cap may be narrowed in a direction from the upper surface of the cap toward the lower surface.

The air openings may have a generally D-shaped structure.

The curved portion of the D-shaped structure may be located in a radially inward position relative to the generally circular cap.

The present invention also provides a cooking gas burner assembly having a first forming portion for supporting the dispenser in a distributor and a cooking gas burner assembly, wherein the distributor and the first forming portion are formed by the first forming portion being the distributor. A recess and a recess to support the recess, wherein the recess substantially enhances the contact area between the first formation and the distributor when the distributor is hotter than when the distributor is cold. Include surfaces that are sized and / or shaped so as not to result.

The dispenser may have the spigot extending downward from the dispenser and the first forming part may include the recesses for receiving each of the spigots.

Alternatively, the dispenser may have the recess for receiving the spigot extending from the first forming portion, the first forming portion comprising the spigot extending upwardly from the first forming portion.

The first forming portion may be a cup, may be a hob, or may be a hob including a cup formed therein.

The spigot can be terminated with one of points, planes or spheres.

The recess and / or spigot may be shaped such that the contact area between the first formation and the distributor does not substantially change when the size of the distributor changes due to thermal expansion.

The recess may be an elongate shape. The elongate shape may have a longitudinal axis substantially positioned on or substantially parallel to the virtual radius emerging from the center of the burner.

The recess is preferably elliptical.

The recess may have an elongate and generally horizontal base surface, which base surface is generally the same shape as the recess.

The recess and the spigot may each have a tapered structure.

The recess may have a shallower taper than the spigot.

Each of the spigots is slidable on each surface of the cup.

A support surface is provided on each base surface, and the distal end of each of the spigots is slidable on the support surface.

Embodiments according to the invention are described by way of example only with reference to the accompanying drawings.

1 is an exploded perspective view of a cooking gas burner.
2 is an exploded perspective view of the cooking gas burner of FIG. 1 viewed from another angle.
3 is a front view of the cooking gas burner of FIG. 1 in an assembled state, which is aligned with the igniter and thermocouple mount.
4 is a cross-sectional view of the cooking gas burner of FIG. 3.
5 is a rear view of the cooking gas burner of FIG. 1.
FIG. 6 is a perspective view of the assembled cooking gas burner of FIG. 3 seen from the front upwards.
7 is a bottom perspective view showing the igniter and thermocouple mount.
8 is an exploded perspective view showing in more detail than FIGS. 1 and 2.
9 is a perspective view of the cup of FIG. 1 seen from above.
FIG. 10 is a front view in an assembled state of another gas burner similar to the cooking gas burner of FIG. 1, which is aligned with the igniter and thermocouple mount. FIG.
11 is a cross-sectional view of the cooking gas burner of FIG. 10.
12 is an exploded perspective view of the cooking gas burner of FIG. 10.
FIG. 13 is a perspective view of the cooking gas burner of FIG. 10 seen from above. FIG.
14 is an exploded perspective view more detailed than FIG.
15 is a detailed perspective view of a cup formed on the hob surface on which the flame port assembly and gas manifold may be assembled.
FIG. 16 is a cross-sectional view of the injector portion of the cooking gas burner of FIG. 4, showing the assembly with a 0.6 mm thick hob. FIG.
FIG. 17 is a cross sectional view similar to the cross sectional view of FIG. 16 showing an assembly with a 1.2 mm thick hob; FIG.
18 is a perspective view of an alternative cap for a gas burner assembly.
19 is a cross-sectional view of the cap of FIG. 18.
20 is a plan view of a deformed cup showing an elliptical tapered recess or formation receiving a spigot from a dispenser.
FIG. 21 is a cross-sectional view of the elliptical tapered formation taken along line XXI-XXI in FIG. 23.
FIG. 22 is a cross-sectional view of an elliptical tapered formation taken along line XXII-XXII in FIG. 23.
FIG. 23 is a top view of an assembled cooking gas burner having a cap similar to that of FIGS. 18 and 19.
24 is a partial detailed view of FIG. 20, which is a plan view showing the recess in detail.

1-9 illustrate a cooking gas burner 10 having a cap 20, a pipe or distributor 30, a cup 40, and a gas manifold 50.

When the cap 20 is positioned above the dispenser, the cap 20 and the dispenser 30 are combined to form a sub-assembly such that the groove of the dispenser 30 on the top of the dispenser forms a flame port 31. .

The gas manifold 50 is manufactured by the structure which consists of two members. The first main member is the upper portion 54 of the base, and has a generally circular upper portion 56 surrounded by the circumferential wall 58. Three sets of pillar forming portions 51 are circumferentially spaced around the upper portion 56, and there is a gas supply inlet 53 having a female screw portion formed between two sets of the pillar forming portions 51. The gas supply inlet 53 may be connected to the gas supply for supplying gas to the burner 10.

The volume enclosed by the top 56 and the circumferential wall 58 may be formed by adding a second member that becomes the bottom 52 of the base attachable to the top 54 of the base using an appropriate grade of silicon, and the circumferential wall ( A portion of 58 is closed by bending, swaging, or clinching the bottom 52 to the top 54. Thus, the rim of the bottom 52 of the base is sealed and fixed by the surface or circumferential wall 58 adjacent to the rim.

The pillar forming portion 51 includes an injector pillar 70 positioned radially inward while engaging the bottom surface of the base of the cup 40 as best shown in FIGS. In addition, pillars 72 and 74 are also provided outside. Pillar 72 engages the bottom surface of hob 141 (see FIGS. 16 and 17), and hob 141 is cup 40 and pillar 72 at the radially outward position where injector pillar 70 engages. Is inserted in between. The shorter column 74 is a filter in the assembly of burner 10 but performs a specific function as described below for burner 100 of FIGS. 10-15.

By means of the rim of the cup 40 in contact with the hob 141 (see FIGS. 16 and 17), the hob 141 can act as a heat sink to assist in dissipating heat from the cup 40, If the hob does not act as a heat sink, this heat may be transferred to manifold 50 or distributor 30 while using burner 10, which is not beneficial.

As can be seen from FIG. 9, screws (not shown) penetrating through holes 42 (and not shown openings in hob 141) in cup 40 to engage longer pillars 72. The cup 40 is then coupled to the hob 141 and the pillar 72. When secured in this way, the inner injector column 70 is positioned in alignment with this opening just below the opening 44 located inside the cup 40. It can be seen from FIGS. 16 and 17 that the injector column 70 has an end portion 57 formed with a female threaded portion, which is provided with a small diameter rim 59. The size of the rim 59 is determined to be able to pass through the opening 44. The height of the rim 59 from over the large diameter shoulder 61 allows the assembly of the cup 40 and the manifold 50 to accommodate hobs 141 of different dimensions. For example, in FIG. 16 the thickness of the hob 141 may be 0.6 mm, whereas in FIG. 17, for example, the thickness of the hob 141 may be approximately 1.2 mm, such that the height of the rim 59 may be at this thickness. It will be appreciated that by accepting the difference, the small diameter rim of the injector column 70 can still be accurately positioned within the opening 44.

The injector or nozzle 49 shown in FIGS. 20, 22 and 24 is screwed into the end 57 at which the female threaded portion of the injector column 70 is formed (see FIGS. 16 and 17). The outlet opening of the nozzle 49 is above the level of the cup 40. With this, any liquid that is poured into the cup 40 during use does not adversely affect the operation of the injector or nozzle 49 until the level of the liquid is above the height of the outlet opening of the nozzle 49.

The cup 40 has a formation 46 extending downward while having an upwardly recessed or blind recess 48. The recess 48 receives a spigot 32 extending downward from the rim of the dispenser 30. By means of the formation 46 and the spigot 32, the dispenser 30 rests on the cup 40, so that the opening 44 is vertically oriented on the bottom surface of the dispenser 30. It is located just below the entrance to, and is aligned with this entrance.

The spigot 32 seated in each formation 46 provides a contact area of about 2.5 mm 2 per spigot 32 using each base 47 (see FIGS. 21 and 22). This significantly reduces heat transfer by conduction from the dispenser 30 to the cup 40.

Mixing chamber 35 receives feed gas from passage 71 via injector column 70, which passage 71 is a gas manifold 40 between top 54 of base and bottom 52 of base. Is in communication with the volume. The compressed gas is injected into the mixing chamber 35 through the opening 44 in the cup 40, and the primary air entering below the distributor 30 through the air opening 34 and the gap 36 is the gas. It can be incorporated into.

The gas and air mixture is distributed to the flame port 31 in the distributor 30 as described in WO2005 / 073630, incorporated herein by reference.

At the circumferential portion of the gas manifold 50 is an L-shaped bracket 77 having openings 78 and 79 for mounting the spark plug or igniter 80 and the thermocouple 81, respectively. Igniter 80 and thermocouple 81 are held in place at gas manifold 50 using clips 82 and 83, respectively. The brackets 77 and openings 78, 79 ensure that the igniter is located close to the inner tube of the flame port 31 in the distributor 30 when the components are assembled. The outer tube part of the flame port 31 is ignited by propagating the flame through the cross-writing interval 37 arranged at equal intervals around the upper part of the distributor 30. As described below with reference to FIGS. 18, 19, and 23, if the air opening of the cap 20 is provided directly above the crosswriting interval 37, additional crosswriting may be facilitated as necessary.

The cup 40 has openings 41, 43 through which the igniter 80 and the thermocouple 81 pass. There is no need to seal between the igniter 80 and the thermocouple 81 and the respective openings 43 and 41, but an O-ring, grommet or other sealing means may be used as needed.

Around the openings 41 and 43 there is a boss 45 made of the material of the cup, which serves to allow the L-shaped bracket 77 to fit snugly under the cup without contacting the cup 40. do. Boss 45 also provides a surface through which igniter 80 and thermocouple 81 pass, which surface is positioned at the maximum height of the cup relative to the lowest or center point in the cup. No liquid poured into the cup by this means passes through the openings 41 and 43 until the level of the liquid in the cup reaches the height of the boss 45.

The distributor 30 includes three equally spaced air openings 34 that allow primary air to enter the bottom surface of the distributor 30. In addition, once assembled, the spigot 32 located within the formation 46 provides a gap 36 between the skirt 33 edge of the dispenser 30 and the rim of the cup 40. This spacing may be between about 5 and 10 mm, but if necessary the skirt 33 edge of the dispenser 30 will extend the edge of the dispenser's skirt by a length such that the edge of the dispenser 30 is in contact with the surface of the hob 141. Can be.

10 to 15, a cooking gas burner 100 similar to burner 10 described above with respect to FIGS. 1 to 9 is shown, and like reference numerals have been used for similar parts. One difference between burner 10 and burner 100 is that burner 100 has a cup 40 integrally formed on the hob surface 140 of the cookware. This means that the screw penetrates the hob 140 and engages or is fixed to the column 72.

Another difference between burner 10 and burner 100 is that in burner 100 a shorter column 74 is used to support the distributor 30 thereon. This is done by using a concentrically arranged spacer 200 having a portion protruding through the opening 143 in the hob 140. The upper portion of the spacer 200 has an opening similar in shape to the opening 46 of the burner 100 for receiving the spigot 32 of the dispenser 30.

Spacer 200 may be made of any suitable material, including metals, polymers, or insulating materials.

By using the manifold 50 with the pillars 72, 74, one kind of gas manifold can be used for the burners 10 or 100, thereby reducing the inventory of the gas manifold 50 and at the same time It provides a simple and effective means for assembling the dispenser 30 on the cup / hob and avoids complicated reassembly after cleaning.

Using the height of the column 72, the manifold 50 is a predetermined distance from the cup 40, i.e. 5 to 20 mm, except where a contact can be made between the injector column 70 and the opening 44. Can be kept at a distance. The injector column 70 is configured to have a clearance of approximately 0.1 mm from the inner rim of the opening 44 so that in theory no contact actually occurs between the injector column 70 and the opening 44, but due to manufacturing tolerances It may be in contact.

18, 19 and 23, cap 220 is shown having a shape and features similar to cap 20 in the previous figures. However, the cap 220 is not the same as the cap 20 in that there are three cross-writing air openings 222 which are arranged to be positioned above the cross-writing gap 37 when the distributor 30 is properly assembled with the cap 220. It is different.

As shown in FIG. 19, the air opening 222 is tapered in cross section and therefore has a larger cross-sectional area at the top of the cap 220 as compared to the outlet of the air opening at the lower surface of the cap 220. In addition, the shape of the air opening is, as shown in Figs. 18 and 23, while the inner wall 224 is curved with respect to the center of the burner assembly in plan view, while the radial outer wall 226 is relatively straight D-shaped. It can be explained.

In FIG. 20 a modified cup 240 is shown, similar to cup 40 in the previous figure. The cup 240 of FIG. 20 shows a concave formation 46 extending downwardly, which receives the spigot 32 extending downward from the dispenser 30.

As can be seen in FIGS. 20, 21 and 23, the base surface 246 of the formation 46 is elliptical and almost horizontal, and the wall 248 of the formation 46 is also elliptical and tapered. have. Note that the major axis of the ellipse formed by the forming portion 46 lies approximately on or parallel to the radial axis from the center of the burner assembly 110 of FIG. 23.

The spigot 32 may be considered to be a truncated conical formation as shown in FIGS. 21 and 22, with the truncated end surface 47 having an area of about 2.5 mm 2. The end surface area of the truncated spigot 32 is kept to a minimum. If desired, the spigot 32 can be terminated at small rounded vertices, thereby forming a partially spherical end and in fact providing much smaller contact area or point contact, thus minimizing heat transfer. The end surface is in contact with the base surface 246 of the formation 46.

21, it should be noted that the forming portion 46 has a shallower taper than is found in the taper on the spigot 32 formed conical. This taper difference ensures that if any contact is made, most point contact or line contact is formed between the two surfaces.

When burner 110 is cold, the spigot 32 preferably has gaps X and Y as shown in FIG. 22 with respect to the wall 248 of the formation 46. Preferably the clearance Y is about 0.5 mm-1 mm, the clearance X is 1.5 mm-3 mm, and most preferably about 2 mm. However, as the dispenser 30 is heated during use, the dispenser 30 becomes large in size due to thermal expansion. To comply with this thermal expansion, the relative position of the spigot 32 is changed by sliding radially outward over the elliptical surface of the base surface 246. This movement does not change the amount of contact area between the cup 240 and the dispenser 30.

At low temperatures, the spacing between the forming portion 46 and the radially outer distal end of the spigot 32 is approximately 2 mm. It is preferable that the air gap remains after thermal expansion. Otherwise, a line contact can be formed between these radially outer ends. This line contact helps to keep the contact area between the dispenser 30 and the cup 240 to a minimum.

As can be readily understood, and as described above, features associated with cup 240 can be formed at each cup or hob surface.

By reducing the contact area between the cup 40 or 240 and the manifold 50, heat transfer by conduction is reduced. In addition, the hobs 141 and 140, which act as heat sinks that take heat away from the cup 40 or 240, assist in this. Also, because the manifold 50 is below the cup 40 or 240, minimal heat is transferred from the cup 40 or 240 to the manifold 50 via convection, and the cup 40 or 240 is dispensed. Since it is located between the 30 and the manifold 50 to form a thermal radiation shield, the radiant heat from the flame at the flame port 31 is also excluded except radiation emitted from the bottom of the cup 40 or 240. It is not delivered directly to the manifold 50. By these means, the gas passing through the gas manifold 50 is less adversely affected by heat than in the burners of the prior art, and thus the fuel passing into the injector (by keeping the feed gas as tight as possible). Helps to maintain the calories of the burner, thereby helping the efficiency of the burner (10 or 100).

The invention disclosed and defined herein extends to all alternative combinations of two or more of the individual features mentioned or evident from the description. All of these different combinations constitute various alternative aspects of the present invention.

The foregoing has described embodiments of the present invention, and those skilled in the art can make modifications applicable to the above-described embodiments without departing from the scope of the present invention.

Claims (19)

An assembly method of assembling a dispenser and a cup in a cooking gas burner assembly, comprising: providing a dispenser having a downwardly extending spigot and providing a cup having a recess for receiving the spigot,
The recess includes a base surface and at least one of the size and shape of the recess such that thermal expansion of the dispenser does not result in an increase in the contact surface between the cup and the dispenser when the dispenser is hotter than when the dispenser is cold. Assembling method. The method of claim 1, wherein the base surface provides a support surface and the distal end of the spigot is slidable on the support surface. The assembly method according to claim 1 or 2, wherein the recess is elliptical or elongated whose major axis lies radially with respect to the center of the distributor. A cooking gas burner assembly comprising a dispenser and a first forming portion for supporting the dispenser in a cooking gas burner assembly, wherein the dispenser and the first forming portion allow the first forming portion to support the dispenser; And at least one of a size and shape such that the thermal expansion of the dispenser does not result in an increase in the contact area between the first forming portion and the dispenser when the dispenser is hotter than at low temperature. A cooking gas burner assembly comprising a surface to be set. The method of claim 4, wherein the burner assembly,
And the dispenser has the scoop extending downward from the dispenser or the dispenser has the recess for receiving the spigot extending from the first forming portion. 6. The cooking gas burner assembly according to claim 4 or 5, wherein the first forming portion includes the recess for receiving each of the spigots or the spigot extending upwardly from the first forming portion. The cooking gas burner assembly of claim 4, wherein the first forming portion is a cup, a hob, a cup-shaped hob therein, or a combination thereof. 5. The cooking gas burner assembly of claim 4, wherein said spigot terminates in one of a portion of a point, a plane, a sphere. 5. The cooking gas burner assembly according to claim 4, wherein the contact area between the first forming portion and the distributor does not change when the size of the distributor is changed due to thermal expansion by the recess or the spigot. 5. The cooking gas burner assembly of claim 4, wherein said recess has an elongate shape. The cooking gas burner assembly of claim 10, wherein the elongate shape lies on or parallel to a virtual radius emerging from the center of the burner. The cooking gas burner assembly of claim 4, wherein the recess is elliptical in shape. 5. The cooking gas burner assembly of claim 4, wherein the recess has an elongate and horizontal surface of a base surface or base surface, the surface of the base surface or base surface having the same shape as the recess. 5. The cooking gas burner assembly of claim 4, wherein said recess and said spigot each have a tapered structure. The cooking gas burner assembly of claim 14, wherein said recess has a taper shallower than said spigot. 8. The cooking gas burner assembly of claim 7, wherein each of the spigots is slidable over a surface of each of the cups. 14. The cooking gas burner assembly of claim 13, wherein each of the base surface or the surface of the base surface provides a support surface, wherein the distal end of one of the spigots is slidable on the support surface. 5. The burner assembly of claim 4, wherein the burner assembly includes a cap and a distributor to which the cap is mounted, the distributor including an inner tube and an outer tube of the flame port, and at least one cross lighting passage between the tube portions. And wherein the cap includes an air opening adapted to be positioned above the cross lighting passage when the cap and the distributor are assembled. The method of claim 18, wherein the air opening,
Of the shape that is narrow in the direction from the upper surface of the cap toward the lower surface, the shape having a D-shaped structure, or the curved portion of the D-shaped structure having a D-shaped structure is located at a radially inward position with respect to the circular cap Cooking gas burner assembly having one or more shapes.

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