RU2701432C2 - Improved gas burner - Google Patents

Abstract

FIELD: fuel combustion methods and devices.

SUBSTANCE: invention relates to the field of power engineering. Gas burner with at least two flame rings consists of injector casing (6) equipped with one vertical injector (22) located in the center on the injector base; flame splitter (4) with external chamber (26) of circular shape and inner chamber (28) of round shape, wherein annular cavity is located between them; cover (8) made integral and having central disk-shaped part, which closes inner circular chamber (28) from above, and annular part (52), which closes outer ring chamber (26) from above; and wherein flame divider (4) from below has mechanism for installation of flame divider on injector housing (6) and connection therewith; inner circular chamber (28) of flame divider (4) comprises one vertical tube adjacent to one vertical injector (22) of injector housing (6), wherein the vertical tube is interconnected with the radial chamber using the Venturi effect formed by inner chamber (28) of flame divider (4) and from above by the restricted central disk-like part of cover (8); flame spreader (4) comprises at least one radial channel (36) for fluid connection of inner round chamber with outer annular chamber (26), wherein radial channel (36) is closed from above by corresponding radial part (56) of cover (8); at least two flame rings include a first flame ring formed in holes (42, 43) made in outer wall (32) of outer annular chamber (26) of flame divider (4), and at least one second flame ring, formed in holes (42, 43), made in inner wall (34) of external annular chamber (26) of flame divider (4), or in holes (42, 43) made in side wall (35) of inner chamber (28) of flame divider (4), or in holes (42, 43), made both in inner wall (34) of external annular chamber (26), and in side wall (35) of inner round chamber (28).

EFFECT: invention makes it possible to evenly distribute flame along entire length.

13 cl, 10 dwg

Description

The present invention relates to an improved gas burner.

Gas burners with a single control and several concentric rings of flame are known, i.e., burners where the gas supply is controlled with a single press. These burners typically contain an injector body bowl; a flame divider mounted on the bowl of the injector body and assembled from two parts connected together to form an inner central chamber and an outer annular chamber; a disk-shaped cover covering the central chamber of the flame divider from above; and an annular cap covering the annular flame divider chamber on top.

Thus, well-known gas burners with several concentric rings consist of a total of five elements assembled together, so the cost of their production is quite high.

One of the known burner designs is disclosed, for example, in patent EP 797048, the proposed burner consists of five elements: a lower cup-shaped supporting part, an intermediate cylindrical element, an upper part having an inner circular chamber and an outer annular chamber, and two lockable covers for these chambers.

To reduce production costs and reduce the complexity of the burner assembly, gas burners with several flame rings consisting of four or three elements are proposed.

For example, EP 2572141 discloses a gas burner with several rings of flame, comprising an injector body and a flame divider forming an outer annular chamber and an inner circular chamber, which are closed by a lid on top. The injector body contains two cup-shaped supporting parts and two vertical injectors located in the transverse plane and adjacent to two vertical tubes, the injectors are installed inside the flame divider and communicate from above with the corresponding arched radial chambers using the Venturi effect installed in the outer annular chamber. In addition, each arched chamber communicates with the inner chamber of the burner through two radial channels.

In more detail, in this burner the gas supply pipe runs horizontally under the bottom of the two cups along the line of their location, moreover, two vertical injectors are used in the burner that supply gas to both arched chambers. However, the fact that one injector is located closer to the gas inlet than the other means that most of the gas leaves this injector, where the gas first goes. It follows that a greater amount of gas reaches the arched chamber, fed from the injector located closer to the gas inlet, therefore, the corresponding flame tongues emerging from the openings of the specified chamber are more stable compared to flame tongues emerging from another arched chamber. In fact, in this burner the generated flames are not uniform and are distributed unevenly around the entire circumference.

In addition, in this well-known burner design, primary air is always drawn in exclusively from the space above the cooking zone.

One objective of the present invention is to provide a gas burner with three elements and / or in any case with fewer elements.

Another objective of the invention is to provide a gas burner with the possibility of manufacturing at very low production costs.

Another objective of the invention is to provide a gas burner that is installed extremely simply, quickly and safely.

Another objective of the invention is to provide a gas burner characterized by a uniform distribution of flame along the entire length.

Another objective of the invention is to provide a gas burner using the cups of the injector body, where the primary air is drawn in from the space under the kitchen burner (such is common in some countries, for example, Brazil) or the cups of the injector, where the primary air is drawn in spaces above the kitchen burner (for example, such are widespread in Europe and the Middle East).

These and other objectives, which will be clear from the following description, are achieved in accordance with the present invention of a gas burner having the characteristics stated in paragraph 1 of the claims.

Further, the present invention is additionally disclosed by means of some suitable variants of its execution, cited as examples without limiting character, with reference to the accompanying drawings, where:

in FIG. 1 shows a perspective view with a spatial separation of the details of the first burner device in accordance with the invention, when viewed from above;

in FIG. 2 shows a perspective view with a spatial separation of the details of the same burner, when viewed from below;

in FIG. 3 shows a vertical section of the burner in assembled form;

in FIG. 4 shows the second burner device in the same form as in FIG. one;

in FIG. 5 shows a perspective view with a spatial separation of the parts of the burner device shown in FIG. 4, when viewed from below;

in FIG. 6 shows a vertical section through the device of FIG. 4, in assembled form;

in FIG. 7 shows a top view of the burner flame divider of FIG. 1-6;

in FIG. 8 is a plan view of a cover suitable for the flame divider of FIG. 7;

in FIG. 9 is a top view of another embodiment of a burner flame divider in accordance with the invention;

in FIG. 10 shows a top view of a cover suitable for the flame divider of FIG. 7 and FIG. 9.

As can be seen in the drawings, the burner 2 in accordance with the present invention comprises a flame divider 4 mounted on the injector body 6 and a cover 8.

In particular, the injector body 6 is of the traditional type and is attached from below to the sheet metal of the cooking zone 10, on which the burner is fixed with screws. An advantage is that the injector body 6 can also fit into another burner previously installed on the cooking zone 10, thereby facilitating its installation for the user.

According to the first device shown in FIG. 1-3, the injector body 6 comprises a cap 12 having side openings 13 for intake of primary air drawn from the space under the kitchen burner. In more detail, the side wall of the cap 12 has a flange 14 protruding outward to attach it from below to the sheet metal of the kitchen burner 10. In addition, this side wall has an extension above the flange 14, forming a neck 15, which serves to install and mount the divider 4 flame.

The injector body 6 with the cap 12 has a certain advantage, since it is small and compact, and, in addition, by drawing in the primary air from the space under the kitchen burner 10, an increase in size is not required to increase the power of the burner.

Alternatively, in accordance with the second device shown in FIG. 4 and 6, the injector body 6 has a support made in the form of a bowl 16, completely closed both from below and from the side, and open from above, where the side wall is provided with a flange 14 that protrudes outward to attach it from below to the edge of the hole provided in the sheet metal cooking hobs 10, for installing the burner.

The side wall of the bowl 16 extends beyond the flange 14, forming a protruding rim 17, forming an element on which the flame divider 4 is mounted. In particular, the flame divider 4 is mounted on the injector body 6 in such a way that a channel is formed between them allowing primary air 19 to be introduced into the bowl 16 of the injector body 6 of the above-mentioned cooking zone 10.

The injector body with the bowl 16 has a certain advantage, namely, that due to the retraction of the primary air from the space above the above-mentioned cooking zone 10, the flow is almost imperceptible; however, in this case, in order to increase the power of the burner, it is necessary to increase the size of the bowl.

In both described devices, the injector body 6 comprises a gas supply channel 20. It runs horizontally below the bottom of the cap 12 or bowl 16 of the injector body 6, the air supply channel is open from one end 21 for air inlet and communicates with the vertical injector 22 screwed in the center to the base of the injector body.

Both of the above devices (i.e., both the first device shown in Fig. 1-3, and the second device shown in Fig. 4-6) are made with the possibility of fixed installation of the same flame divider 4.

The flame divider 4 contains an outer chamber 26 of a circular shape and an inner chamber 28 of a circular shape, and at least one cavity 29 is formed between them.

The tube 30 extends downward from the inner chamber 28 of the flame divider 4 and, if an injector body with a cap 12 is used, it is inserted into the neck 15 of the cap until the upper edge of the neck 15 abuts against the lower surface 27 of the flange made around the tube 30. If in more detail, this contact between the upper edge of the neck 15 and the lower surface of the flange 27, made around the tube 30 of the flame divider 4, provides a tight connection that prevents the entry of primary air into the cap 12 from the space n hell by the kitchen stove. In the case of installing the flame divider 4 on the injector body 6 with the cap 12, alignment is achieved by inserting the tubular part 30 of the flame divider 4 into the neck 15 of the injector body 6.

In addition, downhill projections 23 are provided on the lower surface of the flange 27 of the flame divider 4.

In contrast, if an injector body with a cup 16 is used, these protrusions 23 engage with recesses 31 provided on the inner surface of the side wall of the cup 16, so as to form primary air inlet openings between the flame divider 4 and the cup of the injector 6 19 into the bowl 16 from the space above the cooking zone 10 (see Fig. 6). The connection of the above shaped protrusions 23 and recesses 31 also facilitates the alignment of the flame divider 4 relative to the injector body with the bowl 16.

In both disclosed devices, the method of installing the flame divider 4 on the injector body 6 (with both cap 12 and bowl 16) assumes that the flame divider is placed at some distance from the metal plate 10 of the kitchen burner to form passages for secondary air 25 intended for flame tongues emerging from the cavity 29 of the flame divider 4.

In particular, the outer annular chamber 26 of the flame divider 4 has an outer wall 32 extending along the cylindrical surface and an inner wall 34, a separate part of which is concentrically disposed with respect to the outer wall 32, but then it is connected to parts arranged radially with respect to the cylindrical the wall 35 of the inner chamber 28.

The advantage is that on the lower surface of the outer annular chamber 26, second shaped protrusions 39 are provided to prevent equilibrium displacement, instability or improper location of the flame divider 4 in case of unintentional contact with it.

In the first embodiment of the flame divider 4 (see Figs. 1, 4 and 7), the outer annular chamber 26 of the flame divider 4 communicates with the inner chamber 28 through two radial channels 36 (diametrically aligned) dividing the space between the outer annular chamber 26 and the inner a circular chamber 28 into two symmetrical cavities 29. In addition, the outer annular chamber 26 is divided into two arched sectors 39, separated from one another by two diametrically opposite passages 41, forming two internal combustion channels between the inner Lost 29 flame divider 4 and the external environment.

In the second embodiment of the flame divider 4 (see Fig. 9), the outer annular chamber 26 communicates with the inner annular chamber 28 through four radial channels 36 (aligned at an angle of 90 °), dividing the space between the outer annular chamber 26 and the inner circular chamber 28 into four identical cavities 29.

In addition, the outer annular chamber 26 is divided into four sectors 39, separated from one another by four passages 41, forming four channels of internal combustion.

In one embodiment, not shown here, the outer annular chamber 26 and the inner circular chamber 28 of the flame divider 4 communicate with each other via one channel 36. In this case, there is one cavity 29 located around the inner circular chamber 28 and one channel 41 of the inner burning.

In more detail, in both of the presented embodiments of the flame divider 4, the outer annular chamber 26 and the inner circular chamber 28 are limited to one continuous wall located along their entire length except for parts related to the radial channel or channels 36, with many openings for the primary exit a mixture of gas (air) and the formation of at least two rings of flame. These openings respectively include main openings 42 and secondary openings 43 (see Figs. 1, 2, 4, and 5).

Preferably, said openings 42 and 43 are formed in the outer wall 32 of the outer annular chamber 26 to form a first ring of outwardly extending flames, in the inner wall 34 of the outer annular chamber 26 to form an intermediate second ring of flame extending into the cavity 29, and in the side wall 35 of the inner chamber 28 to form an inner third ring of flame, also extending into the cavity 29.

In an additional embodiment of the present invention, not presented here, only two rings of flame can be obtained, one of them is fed through holes 42, 43 made in the outer wall 32 of the outer annular chamber 26, and the other through holes 42, 43 made in the inner wall 34 of the outer annular chamber or, alternatively, made in the side wall 35 of the inner circular chamber 28 of the flame divider 4.

The tube 30 of the flame divider 4 forms a vertical channel 46, with its lower part facing the injector 22 mounted on the injector body 6, and the upper part communicating with the radial chamber 47 using the Venturi effect, bounded along the circumference by the wall 35 of the inner chamber 28, from the bottom the base 49 and from above - the cover 8, and its position relative to the flame divider 4 is set by four centering pegs 50 provided therein.

Preferably, between the annular wall 35 of the inner chamber 28 and the upper end of the tube 30, curved partitions 37 are provided, forming a central passage hole to form additional arched chambers together with the annular wall 35. In particular, the mixture coming from the tube 30 enters additional arched chambers through the passage hole formed in the curved partitions 37, and leaves them through holes 42, 43 made in the side wall 35 of the inner circular chamber 28 of the divider 4 flame Yeni. Thus, the mixture exiting the tube 30 is slowed down to prevent separation of the flame and to ensure greater stability of the main ring of flame fed through holes 42, 43 made in the annular wall 35 of the inner circular chamber 28.

The cover 8 is made as a whole and has an outer annular part 52, an inner disk-shaped part 54 and four shaped radial parts 56, designed to connect the outer part 52 and the inner part 54, as well as to close the channels 36 and (or) passages 41 from above In particular, in the lid of FIG. 8, intended to be mounted on the flame divider shown in FIG. 1, 4 and 7, for closing the two channels 36 of the flame divider 4 from above, two radial connecting parts 56 are provided, diametrically aligned. In contrast, in the lid of FIG. 10 4, there are four shaped radial connecting parts 56 located at an angle of 90 ° one relative to the other, so as to close four channels 36 from above; in particular, this cover 8 is intended to be mounted on the four-channel flame protector shown in FIG. 9, however, it can also be used appropriately in combination with the dual-channel flame divider shown in FIG. 7 (see Fig. 1-6).

If a flame divider 4 with one radial channel 36 is used, the cover 8 may comprise one radial part 56 for connecting the inner disk-shaped part 52 to the outer annular part 56 so as to cover the above radial channel 36.

The burner in accordance with the present invention operates as follows.

Gas entering through the inlet 21 from the tube 20 exits the injector 22 and enters the vertical tube 46 of the flame divider 4, entraining primary air. Primary air can be drawn in from the space under the cooking zone 10 in the case of the injector body 6 with a cap 12 (see Fig. 1-3) or, alternatively, out of the space above the cooking zone 10 in the case of the bowl-shaped injector 6 along the path indicated arrow 19 in FIG. 6.

The flow of gas and primary air, starting to mix in the vertical tube 46, then completes its mixing in the corresponding radial Venturi chamber 47, bounded above by the inner disk-shaped part 54 of the cover 8.

The mixture obtained in this way can feed the inner ring of flame, leaving the holes 42 in the inner circular chamber 28. In addition, the mixture passes through the channels 36, closed from above by the connecting parts 56 of the lid 8, reaching the outer annular chamber 26 of the flame divider 4 to power the outer ring of flame, as well as the intermediate ring of flame, if any.

The injector body 6 accordingly comprises a support arm 60 for the glow plug 62.

From the above description it follows that the burner in accordance with the present invention has much more advantages compared to traditional burners with several rings of flame, in particular:

- it consists of only three elements, and due to the integral cast design of the flame divider, which does not require secondary processing, its production becomes very simple and economical;

- despite the fact that the cover is designed for a burner with two or three rings of flame, it is also made as a whole, which also makes the production of the burner very simple and economical;

- the burner has a radial mixing chamber of the Venturi type, which allows to reduce the overall height of the burner;

- the burner has one injector located in the center of the injector body, and this in combination with the fact that the radial chamber using the Venturi effect is located in the inner circular part of the flame divider, directly adjacent to the injector, means that the result is one mixture, also uniformly distributed inside the outer annular chamber of the flame divider to ensure the formation of rings of uniform flame along the respective circles;

- this allows you to design burners where the same flame divider and the same cover can be used both on the injector body with the primary air drawing in from the space under the kitchen burner, and on the injector body with the primary air drawing in from the space above the kitchen burner, and, finally, on existing injector bodies of standard sizes;

- the design of three elements (injector body, flame divider and cover) is assembled very easily, quickly and intuitively.

In particular, the burner in accordance with the present invention has advantages and differs from traditional burners in that in addition to having three elements (injector body, flame protector and cover), it also ensures uniform and uniform distribution of flame over the entire annular flame propagation region.

Claims (23)

1. A gas burner with at least two rings of flame, consisting of: - the injector body (6) equipped with one vertical injector (22) located in the center at the base of the injector; - a flame divider (4) with an external chamber (26) of a circular shape and an internal chamber (28) of a circular shape, with an annular cavity (29) located between them; - a lid (8), made as a whole and having a central disk-shaped part (54) that covers the top of the inner circular chamber (28), and an annular part (52) that covers the top of the outer annular chamber (26); and wherein: - the flame divider (4) from below has a mechanism (30, 23) for installing the flame divider on the injector body (6, 12) and connecting to it; - the inner circular chamber (28) of the flame divider (4) contains one vertical tube (46) adjacent to one vertical injector (22) of the injector body (6), the vertical tube (46) communicating with the radial chamber (47) using the effect Venturi formed by the inner chamber (28) of the flame divider (4) and on top of it is bounded by the central disk-shaped part (54) of the cover (8); - the flame divider (4) contains at least one radial channel (36) for fluidly connecting the inner circular chamber (28) to the outer annular chamber (26), the radial channel (36) being closed on top by the corresponding radial part (56) of the cover (8) ); - at least two rings of flame include a first ring of flame created in holes (42, 43) formed in the outer wall (32) of the outer annular chamber (26) of the flame divider (4), and at least one second flame ring generated in the holes (42, 43) made in the inner wall (34) of the outer annular chamber (26) of the flame divider (4), or in the holes (42, 43) made in the side wall (35) of the inner chamber (28) of the divider ( 4) a flame, or in holes (42, 43) made both in the inner wall (34) of the outer annular chamber (26), and in the side wall (35) of the inner circular chamber (28). 2. A burner according to claim 1, characterized in that a vertical channel (46) adjacent to a single vertical injector (22) is formed inside the tube (30), going down from the inner chamber (28) of the flame divider (4). 3. A burner according to any one of the preceding paragraphs, characterized in that the injector body (6, 12) has a cap shape and is provided with openings (13) for the primary air inlet from the space under the kitchen burner (10), where the burner should be installed, and the mechanism (30, 23) for its installation contains a tube (30), going down from the inner chamber (28) of the flame divider (4) and hermetically inserted into the injector body (6, 12). 4. A burner according to any one of the preceding paragraphs, characterized in that the dimensions of the tube (30) are selected so as to connect it to the inner wall of the neck (15) provided in the injector body (6, 12) in the form of a cap, thus in order to ensure a tight connection, which prevents the entry of primary air into the injector body (6, 12), made in the form of a cap, from the space above the kitchen burner. 5. A burner according to any one of the preceding paragraphs, characterized in that the injector body (6, 12) is in the shape of a bowl and is closed on the side and on the base side, while the mounting mechanism includes shaped protrusions (23) protruding downward from the divider base ( 4) flames to engage with the injector body (6) in such a way as to form passages for the intake of primary air (19) drawn into the injector body from the space above the cooking zone (10), where it is intended to install a burner. 6. Burner according to any one of the preceding paragraphs, characterized in that the shaped protrusions (23) engage with recesses (31) provided on the inner surface of the side wall of the injector body (6, 16) made in the shape of a bowl. 7. Burner according to any one of the preceding paragraphs, characterized in that the installation mechanism comprises: - a tube (30) going down from the inner chamber (28) of the flame divider (4) and hermetically inserted into the injector body (6, 12), in the case when the injector body (6, 12) is made in the form of a cap having openings ( 13) for the intake of primary air from the space under the kitchen burner (10), where it is supposed to install a burner; - shaped protrusions (23), protruding downward from the base of the flame divider (4) and meshing with the injector body (6, 16), in the case when the injector body (6, 16) is made in the form of a cup closed both side and from the base side, so as to form openings for the inlet into the injector body of primary air (19) drawn from the space above the kitchen burner (10), where it is intended to install a burner. 8. Burner according to any one of the preceding paragraphs, characterized in that the flame divider (4) is mounted on the injector body (6) by means of an installation mechanism (30, 23) so that the flame divider is located at a certain distance from the kitchen burner (10) to form openings for inlet into the annular cavity (29) of secondary air (25) intended for the second ring of flame. 9. A burner according to any one of the preceding paragraphs, characterized in that at least one hole (41) is provided in the outer annular chamber (26) to form an internal combustion channel. 10. Burner according to any one of the preceding paragraphs, characterized in that the holes made in the outer wall (32) of the outer annular chamber (26) of the flame divider (4), and (or) in the inner wall (34) of the outer annular chamber (26) the flame divider (4), and (or) in the side wall (35) of the inner circular chamber (28), include main openings (42) and secondary openings (43). 11. A burner according to any one of the preceding paragraphs, characterized in that the flame divider (4) comprises two radial chambers (36) providing a fluid connection between the inner circular chamber (28) and the outer annular chamber (26). 12. A burner according to any one of the preceding paragraphs, characterized in that the walls defining the radial chambers (36) of the flame divider (4) have secondary internal combustion holes for distributing the flame between the flame ring formed in the holes (42, 43) made in the inner wall (34) of the outer annular chamber (26) of the flame divider (4), and the flame ring formed in the holes (42, 43) made in the side wall (35) of the inner circular chamber (28) of the flame divider (4). 13. Burner according to any one of the preceding paragraphs, characterized in that the injector body (6) has a lever (60) for attaching a spark plug (62) located in the annular cavity (29).

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