CN213656739U - Fire cover and combustor with same - Google Patents

Abstract

The utility model provides a fire lid and combustor that has this fire lid. The fire lid includes the fire lid body, it has round main fire hole and round flame stabilizing hole to arrange along the circumferential direction on the annular perisporium of fire lid body, the fire lid body is including the first body that from top to bottom sets gradually, second body and third body, the external diameter of first body is D1, the external diameter of second body is D2, the external diameter of third body is D3, D1 > D2 > D3, each main fire hole part is located first body, the part is located the second body, each flame stabilizing hole part is located the second body, the part is located the third body. The utility model discloses can avoid main fire hole and steady flame hole to block up to can improve the reliability of combustor work.

Description

Fire cover and combustor with same

Technical Field

The utility model relates to a domestic gas cooking utensils technical field specifically relates to a fire lid and have combustor of this fire lid.

Background

At present, two burners are generally provided on a household gas cooker. Each burner includes a distributor, a venturi connected to the distributor, and a fire cover covering the distributor, and a mixing chamber is formed by the three. The fire cover is provided with a circle of big fire holes and a circle of small fire holes, and the small fire holes are positioned below the big fire holes and are staggered with the big fire holes. The gas in the gas mixing chamber flows out of the fire holes and is combusted on the surface of the fire holes. During combustion, the small fire holes are small in cross sectional area, and the resistance of gas outflow is large, so that the small fire holes can be combusted on the surfaces of the small fire holes, and the periphery of the small fire holes can be rapidly heated. Compared with the small fire holes, the large fire holes have larger cross-sectional areas, and the gas flows out faster, so that burning flames are easy to separate from the surfaces of the large fire holes, namely flame separation. Due to the preheating effect of the small fire, the flame of the large fire hole can be pulled back to the surface of the large fire hole for combustion.

Although the upper and lower circles of fire hole type fire covers solve the problem of flame leaving, when the fire cover meets the conditions of overflowing, and the like, fire is easily extinguished, serious potential safety hazards exist, the fire holes are easily blocked, and the fire holes cannot emit fire during combustion, so that inconvenience is brought to users.

Therefore, how to improve the structure of the fire cover to avoid the fire hole blockage becomes a problem to be solved urgently in the prior burner.

SUMMERY OF THE UTILITY MODEL

In order to at least partially solve the problems in the prior art, a fire cover is provided, which includes a fire cover body, a ring-shaped peripheral wall of the fire cover body is provided with a circle of main fire holes and a circle of flame stabilizing holes arranged along a circumferential direction, the fire cover body includes a first body, a second body and a third body which are sequentially arranged from top to bottom, an outer diameter of the first body is D1, an outer diameter of the second body is D2, an outer diameter of the third body is D3, D1 > D2 > D3, each main fire hole is partially located on the first body and partially located on the second body, and each flame stabilizing hole is partially located on the second body and partially located on the third body. When the overflowing liquid flows downwards to the second body along the outer edge of the first body during the overflowing process, part of the main fire holes on the first body (for the sake of distinction, part of the main fire holes on the first body are called as upper main fire holes) can damage the surface tension of the overflowing liquid, so that the overflowing liquid can more easily avoid the main fire holes and drip downwards or continuously flow downwards from the joint of the first body and the second body; even if a small amount of the spilled liquid enters the upper main fire hole, due to the existence of a part of the main fire holes on the second body (for the sake of distinction, a part of the main fire holes on the second body is referred to as a lower main fire hole), the spilled liquid entering the upper main fire hole is evaporated at a high temperature, so that the combustion of the main fire hole is not affected. When the overflow flows to the second body, the surface tension of the overflow is destroyed due to the existence of the partial flame stabilizing holes (for the sake of distinction, the partial flame stabilizing holes on the second body are called as upper flame stabilizing holes), so that the overflow can more easily avoid the flame stabilizing holes and can drop downwards or continuously flow downwards from the joint of the second body and the third body; even if a small amount of overflow liquid enters the upper flame-stabilizing hole, due to the existence of the partial flame-stabilizing holes on the third body (for the sake of distinction, the partial flame-stabilizing holes on the third body are called as lower flame-stabilizing holes), the overflow liquid entering the upper flame-stabilizing hole can be evaporated at high temperature, and the combustion of the upper flame-stabilizing hole can not be influenced. Therefore, the main fire hole and the flame stabilizing hole are prevented from being blocked, and the working reliability of the combustor can be improved.

Illustratively, a first step line is formed between the first body and the second body, a second step line is formed between the second body and the third body, a central line of the main flame hole coincides with the first step line, and a central line of the flame stabilizing hole coincides with the second step line. Because a first step line is formed between the first body and the second body, a second step line is formed between the second body and the third body, the central line of the main fire hole is superposed with the first step line, and the central line of the flame stabilizing hole is superposed with the second step line, when the pot is overflowed, the overflowed liquid flows downwards to the first step line along the outer edge of the first body, the upper half main fire hole on the first body can damage the surface tension of the overflowed liquid, so that the overflowed liquid can more easily avoid the main fire hole and can drip downwards or continuously flow downwards from the first step line; even if there is a small amount of overflow to get into first main fire hole on the first body, because the existence of second main fire hole on the second body, high temperature can evaporate the overflow that gets into first main fire hole on the first body to main fire hole burning also can not be influenced. When the overflow flows to the second body, the surface tension of the overflow is destroyed due to the existence of the upper half flame stabilizing hole on the second body, so that the overflow can more easily avoid the flame stabilizing hole and drip down or continue to flow down from the second step line; even if a small amount of overflow liquid enters the upper half flame stabilizing hole on the second body, due to the existence of the lower half flame stabilizing hole, the overflow liquid entering the upper half flame stabilizing hole on the second body can be evaporated at high temperature, so that the combustion of the flame stabilizing hole can not be influenced. Therefore, the main fire hole and the flame stabilizing hole are prevented from being blocked, and the working reliability of the combustor can be improved.

Illustratively, the main fire hole comprises a fire hole inlet arranged on the inner surface of the fire cover body and a fire hole outlet arranged on the outer surface of the fire cover body, and the main fire hole is horizontally arranged from the fire hole inlet to the fire hole outlet. Therefore, the phenomenon that the gas flowing out from the main fire hole is too fast, and the gas flows out before complete combustion to pollute indoor air can be avoided.

Illustratively, the flame stabilizing holes comprise a flame hole inlet arranged on the inner surface of the flame cover body and a flame hole outlet arranged on the outer surface of the flame cover body, and the flame stabilizing holes are horizontally arranged from the flame hole inlet to the flame hole outlet. So, can avoid the gas velocity that flows out from steady flame hole too fast to realize pulling back the surface combustion in main flame hole with the flame in main flame hole well, improve steady flame effect.

Illustratively, the flame stabilizing hole is a counterbore, the counterbore of the counterbore is close to the outer surface of the fire cover body, and the bottom hole of the counterbore is close to the inner surface of the fire cover body. Therefore, the flame stabilizing hole is designed to have a small inner part and a large outer part, so that the flame stabilizing effect can be achieved, and the requirements of flame transmission and flame connection can be met.

Illustratively, the main fire hole and the counter bore are both round holes, and the diameter of the main fire hole is larger than that of the counter bore. Therefore, the flame stabilizing effect of the flame stabilizing holes can be ensured.

Illustratively, the center line of the main flame hole and the center line of the flame stabilizing hole have different included angles relative to the same reference radial line on the same circumference. Therefore, the main fire holes and the flame stabilizing holes are arranged in a staggered mode, and flame connection is facilitated.

Illustratively, at least one flame stabilizing hole is arranged between two adjacent main fire holes. Therefore, the flame stabilizing holes can connect the flames of two adjacent main flame holes, and the flame transmitting and connecting effects are better realized.

Illustratively, a frustum-shaped outer side surface is formed below the third body, the first body is provided with a step surface at the position of the first step line, and a fire outlet cavity is formed among the frustum-shaped outer side surface, the outer side surface of the third body, the outer side surface of the second body and the step surface. By the arrangement, even fire can be guaranteed under small load, and flame does not fly away under large load.

According to another aspect of the present invention, there is also provided a burner comprising any one of the fire covers as described above. Since the above fire cover has the above advantageous effects, the burner provided with the above fire cover also has the above advantageous effects.

The advantages and features of the present invention are described in detail below with reference to the accompanying drawings.

Drawings

The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions thereof, which are used to explain the principles of the invention. In the drawings, there is shown in the drawings,

fig. 1 is a perspective view of a fire cover according to an exemplary embodiment of the present invention;

FIG. 2 is a front view of the fire lid shown in FIG. 1;

FIG. 3 is a top view of the fire lid shown in FIG. 1;

fig. 4 is a sectional view a-a in fig. 3.

Wherein the figures include the following reference numerals:

10-fire lid body

110-main fire hole

111-fire hole inlet

112-fire hole outlet

120-flame stabilizing hole

1201-counter bore

1202-bottom hole

121-fire hole entrance

122-fire hole outlet

101-first body

1011-step surface

102-second body

103-third body

104-first step line

105-second step line

106-frustum shaped outer side surface

107-fire outlet chamber

20-gas channel

Detailed Description

In the following description, numerous details are provided to provide a thorough understanding of the present invention. One skilled in the art, however, will understand that the following description illustrates only a preferred embodiment of the invention and that the invention may be practiced without one or more of these details. In addition, some technical features that are well known in the art are not described in detail in order to avoid obscuring the present invention.

For a household gas range, a burner of the household gas range generally has a large flame cover (also called an outer ring flame cover) and a small flame cover (also called a center flame cover) to form at least two rings of flames, thereby providing a plurality of flame modes when used by a user. Accordingly, the burner further comprises a large flame distributor and a small flame distributor, and a large flame venturi and a small flame venturi. The small fire distributor is arranged at the center of the large fire distributor. The big fire cover and the small fire cover are respectively covered on the big fire distributor and the small fire distributor, and the big fire cover is positioned at the periphery of the small fire cover. The big fire venturi and the small fire venturi are respectively connected to the big fire distributor and the small fire distributor. The big fire distributor, the big fire cover and the big fire venturi form a big fire gas mixing chamber. The small fire distributor, the small fire cover and the small fire venturi form a small fire gas mixing chamber.

A fire cover according to an embodiment of the present invention will be described with reference to fig. 1 to 4. The embodiment shown in fig. 1 to 4 is a small fire lid, and the large fire lid may have the same structure if necessary, so that the large fire lid and the small fire lid will be collectively referred to as a fire lid hereinafter without being distinguished.

As shown in fig. 1 to 4, the fire lid includes a fire lid body 10, and a gas passage 20 is provided in the fire lid body 10, the gas passage 20 being a part of a gas mixing chamber when the fire lid is covered on the fire distributor. The annular peripheral wall of the fire cover body 10 is provided with a circle of main fire holes 110 and a circle of flame stabilizing holes 120 arranged along the circumferential direction, the main fire holes 110 and the flame stabilizing holes 120 communicate the gas channel 20 with the outside, the main fire holes 110 are used for providing the main heating flame, the main fire holes 110 can be distributed on the fire cover at equal intervals, and the main fire holes 110 can also be distributed on the fire cover at unequal intervals according to requirements. The flame stabilizing hole 120 is located below the main fire hole 110, and serves to pull the flame of the main fire hole 110 back to the surface of the main fire hole 110 for combustion, thereby performing a flame stabilizing function. The fire cover body 10 comprises a first body 101, a second body 102 and a third body 103 which are sequentially arranged from top to bottom, the outer diameter of the first body 101 is D1, the outer diameter of the second body 102 is D2, the outer diameter of the third body 103 is D3, D1 > D2 > D3, so that the fire cover body 10 integrally forms a two-stage stepped brim, in terms of a single main fire hole 110, the main fire hole 110 is partially positioned on the first body 101 and partially positioned on the second body 102, and in terms of a single flame stabilizing hole 120, the flame stabilizing hole 120 is partially positioned on the second body 102 and partially positioned on the third body 103. When the overflowing liquid flows down to the second body 102 along the outer edge of the first body 101 during the pot overflowing, part of the main fire holes 110 on the first body 101 (for the sake of distinction, part of the main fire holes on the first body are called as upper main fire holes) can destroy the surface tension of the overflowing liquid, so that the overflowing liquid can more easily avoid the main fire holes and drip down or continue to flow down from the joint of the first body 101 and the second body 102; even if a small amount of the spilled liquid enters the upper main fire hole, the spilled liquid entering the upper main fire hole may be evaporated by a high temperature due to the presence of a portion of the main fire holes on the second body 102 (for the sake of distinction, the portion of the main fire holes on the second body is referred to as the lower main fire hole), and thus the combustion of the main fire holes may not be affected. When the overflow flows to the second body 102, due to the existence of the partial flame stabilizing holes on the second body 102 (for the sake of distinction, the partial flame stabilizing holes on the second body are called as upper flame stabilizing holes), the surface tension of the overflow is destroyed, so that the overflow can more easily avoid the flame stabilizing holes, and the overflow drops downwards or continues to flow downwards from the joint of the second body 102 and the third body 103; even if a small amount of overflow liquid enters the upper flame-stabilizing hole, due to the existence of a part of flame-stabilizing holes on the third body 103 (for the sake of distinction, the part of flame-stabilizing holes on the third body is called as lower flame-stabilizing holes), the overflow liquid entering the upper flame-stabilizing hole is evaporated at high temperature, so that the combustion of the upper flame-stabilizing hole is not influenced. Therefore, the main fire holes 110 and the flame stabilizing holes 120 are prevented from being blocked, and the reliability of the operation of the burner can be improved.

As an exemplary embodiment, a first step line 104 is formed between the first body 101 and the second body 102, a second step line 105 is formed between the second body 102 and the third body 103, a center line of the main fire hole 110 coincides with the first step line 104, and a center line of the flame stabilizing hole 120 coincides with the second step line 105. Thus, since a first step line 104 is formed between the first body 101 and the second body 102, a second step line 105 is formed between the second body 102 and the third body 103, the center line of the main fire hole 110 coincides with the first step line 104 (the first step line 104 divides the main fire hole 110 into an upper half main fire hole located on the first body 101 and a lower half main fire hole located on the second body 102), the center line of the flame stabilizing hole 120 coincides with the second step line 105 (the second step line 105 divides the flame stabilizing hole 120 into an upper half flame stabilizing hole located on the second body 102 and a lower half flame stabilizing hole located on the third body 103), when the pot is overflowed, the overflowed liquid flows downwards to the first step line 104 along the outer edge of the first body 101, and the upper half main fire hole on the first body 101 can damage the surface tension of the overflowed liquid, so that the overflowed liquid can more easily avoid the main fire hole 110 and drip downwards or continuously flow downwards from the first step line 104; even if a small amount of spilled liquid enters the upper half of the main fire hole on the first body 101, due to the existence of the lower half of the main fire hole on the second body 102, the spilled liquid entering the upper half of the main fire hole on the first body 101 can be evaporated at high temperature, so that the combustion of the main fire hole 101 cannot be influenced. Furthermore, when the overflow flows to the second body 102, due to the existence of the upper half flame stabilizing hole on the second body 102, the surface tension of the overflow is destroyed, so that the overflow can more easily avoid the flame stabilizing hole 120 and drip down or continue to flow down from the second step line 105; even if a small amount of overflow liquid enters the upper half flame-stabilizing hole on the second body 102, due to the existence of the lower half flame-stabilizing hole, the overflow liquid entering the upper half flame-stabilizing hole on the second body 102 is evaporated at high temperature, so that the combustion of the flame-stabilizing hole 120 is not affected. Therefore, the main fire holes 110 and the flame stabilizing holes 120 are prevented from being blocked, and the reliability of the operation of the burner can be improved.

Referring again to fig. 4, the main fire hole 110 includes a fire hole inlet 111 provided on an inner surface of the fire cover body 10 and a fire hole outlet 112 provided on an outer surface of the fire cover body 10, and the main fire hole 110 is horizontally provided from the fire hole inlet 111 to the fire hole outlet 112. That is, the centers of all the fire hole inlets 111 and the centers of all the fire hole outlets 112 are located on the same horizontal plane, so that it is possible to prevent the gas flowing out from the main fire holes 110 from being too fast, which may cause the gas to flow out before complete combustion, and pollute the indoor air.

Further, the flame stabilizing hole 120 includes a flame hole inlet 121 provided on an inner surface of the flame cover body 10 and a flame hole outlet 122 provided on an outer surface of the flame cover body 10, and the flame stabilizing hole 120 is horizontally arranged from the flame hole inlet 121 to the flame hole outlet 122. That is, the centers of all the fire hole inlets 121 and the centers of all the fire hole outlets 122 are located on the same horizontal plane, so that the gas flowing out of the flame stabilizing holes 120 can be prevented from flowing too fast, and the flame of the main fire hole 110 can be pulled back to the surface of the main fire hole 110 to be burned, thereby improving the flame stabilizing effect.

Further, the flame stabilizing hole 120 is a counter bore, a counter bore 1201 of the counter bore is close to the outer surface of the fire cover body 10, and a bottom hole 1202 of the counter bore is close to the inner surface of the fire cover body 10. Thus, the flame stabilizing hole 120 not only can achieve the flame stabilizing effect, but also can meet the requirements of flame transmission and flame connection through the structural design of small inside and large outside.

Furthermore, the main fire hole 110 and the counter bore 1201 are both round holes, and the diameter of the main fire hole 110 is larger than that of the counter bore 1201. In this way, the flame stabilizing effect of the flame stabilizing holes 120 can be ensured.

In the embodiment of the present invention, the main fire holes 110 and the flame stabilizing holes 120 are arranged in a staggered manner, and particularly, on the same circumference, the central line of the main fire holes 110 and the central line of the flame stabilizing holes 120 have different included angles with respect to the same reference radial line. Thus, the main fire holes 110 and the flame stabilizing holes 120 are arranged in a staggered manner, so that flame connection is facilitated.

Further, at least one flame stabilizing hole 120 is disposed between two adjacent main fire holes 110. In this way, the flame stabilizing holes 120 can connect the flames of two adjacent main flame holes 110, and the effect of flame transfer and flame connection is better achieved.

As an exemplary embodiment, a frustum-shaped outer side surface 106 is formed below the third body 103, the first body 101 has a step surface 1011 at the position of the first step line 104, and a fire outlet chamber 107 is formed between the frustum-shaped outer side surface 106, the outer side surface of the third body 103, the outer side surface of the second body 102, and the step surface 1011. By the arrangement, even fire can be guaranteed under small load, and flame does not fly away under large load.

It should be noted that reference herein to "inner surface" and "outer surface" is with respect to the fire lid being placed on the distributor, with the exposed surface of the fire lid body 10 being the outer surface and the opposite unexposed surface being the inner surface.

According to another aspect of the present invention, there is also provided a burner having any one of the fire covers as described above. Besides, the burner also comprises a fire divider, a Venturi and the like. The distributor and the venturi can have various structures, present or possible in the future, which do not constitute a limitation of the scope of protection of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "upper", "lower" and "horizontal" etc. is usually based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the scope of the present invention.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe the spatial relationship of one or more components or features shown in the figures to other components or features. It is to be understood that the spatially relative terms are intended to encompass not only the orientation of the component as depicted in the figures, but also different orientations of the component in use or operation. For example, if an element in the drawings is turned over in its entirety, the articles "over" or "on" other elements or features will include the articles "under" or "beneath" the other elements or features. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". Further, these components or features may also be positioned at various other angles (e.g., rotated 90 degrees or other angles), all of which are intended to be encompassed herein.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, elements, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. The utility model provides a fire lid, includes the fire lid body, it has round main fire hole and round flame stabilizing hole to arrange along the circumferential direction on the annular perisporium of fire lid body, its characterized in that, the fire lid body is including first body, second body and the third body that from top to bottom sets gradually, the external diameter of first body is D1, the external diameter of second body is D2, the external diameter of third body is D3, and D1 > D2 > D3, each main fire hole part is located on the first body, the part is located on the second body, each flame stabilizing hole part is located on the second body, the part is located on the third body.

2. The fire cover according to claim 1, wherein a first step line is formed between the first body and the second body, a second step line is formed between the second body and the third body, a center line of the main fire hole coincides with the first step line, and a center line of the flame stabilizing hole coincides with the second step line.

3. The fire cover of claim 2, wherein the main fire hole comprises a fire hole inlet provided on an inner surface of the fire cover body and a fire hole outlet provided on an outer surface of the fire cover body, the main fire hole being horizontally arranged from the fire hole inlet to the fire hole outlet.

4. The fire cover of claim 2, wherein the flame stabilizing holes comprise a fire hole inlet disposed on an inner surface of the fire cover body and a fire hole outlet disposed on an outer surface of the fire cover body, and the flame stabilizing holes are horizontally disposed from the fire hole inlet to the fire hole outlet.

5. The fire cover of claim 4, wherein the flame stabilizing holes are counter bores, the counter bores of the counter bores are close to the outer surface of the fire cover body, and the bottom holes of the counter bores are close to the inner surface of the fire cover body.

6. The fire cover of claim 5, wherein the primary fire holes and the counter bores are circular holes, and the diameter of the primary fire holes is greater than the diameter of the counter bores.

7. The fire cover according to claim 2, wherein the center line of the main fire holes and the center line of the flame-stabilizing holes have different angles with respect to the same reference radial line on the same circumference.

8. The fire cover of claim 7, wherein at least one of the flame stabilizing holes is disposed between two adjacent main fire holes.

9. The fire cover according to any one of claims 2 to 8, wherein a frustum-shaped outer side surface is formed below the third body, the first body has a step surface at the first step line position, and a fire outlet chamber is formed between the frustum-shaped outer side surface, the outer side surface of the third body, the outer side surface of the second body and the step surface.

10. A burner comprising a fire cover as claimed in any one of claims 1 to 9.

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