CN211716560U - Small fire cover and combustor with same - Google Patents

Abstract

The utility model provides a little fire lid and combustor that has this little fire lid. The small fire cover comprises an upper cover body and a lower base body, fire holes are arranged in the lower base body along the circumferential direction of the side wall, the upper cover body is arranged above the lower base body and comprises a top surface, a lateral surface and a bottom surface, pits are formed in the top surface, the diameter of the top surface is larger than that of the bottom surface, the outer peripheral edge of the top surface extends downwards obliquely to the outer peripheral edge of the bottom surface to enable the lateral surface to form an inverted cone-shaped flow guide surface, and the diameter of the bottom surface is larger than that of the lower base body so that the whole diameter of the upper cover body completely covers the fire holes in. The utility model discloses little fire lid is owing to have pit and back taper flow guide face, and the whole diameter of going up the lid covers the fire hole on the seat down completely, can prevent to block up the fire hole because soup that falls carelessly etc. in the combustor use to eliminated because the fire hole blocks up or the fire extinguishes the potential safety hazard that brings, improved the safety in utilization of combustor.

Description

Small fire cover and combustor with same

Technical Field

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

Background

At present, a burner comprises a large fire cover and a small fire cover, wherein the small fire cover is positioned at the central position of the burner (also called as a central fire cover), the small fire cover is usually arranged on the burner seat and is tightly matched with the burner seat, fire spraying holes of the small fire cover are arranged on the outer side wall of the small fire cover (only fire comes out all around), the top surface of the small fire cover is generally a horizontal plane, and the small fire cover is not provided with the fire spraying holes. Such little fire lid has fire all around only, and the centre does not have fire, and this kind of little fire lid leads to flame-out for preventing in the gas-cooker use because the hot water that falls carelessly blocks up the flame projecting hole, sets up the pit as flourishing liquid district at the top surface of little fire lid, and more some for the hot water that the water conservancy diversion carelessly falls, specially sets up a water conservancy diversion hole.

However, even if the liquid flows down from the diversion holes for a long time, the diversion holes are still blocked, and once the diversion holes are blocked, the liquid flows to the fire holes beside the diversion holes, and finally the fire holes are blocked, so that flameout is caused.

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

SUMMERY OF THE UTILITY MODEL

In order to at least partially solve the problems in the prior art, the small fire cover comprises an upper cover body and a lower base body, fire holes are arranged on the lower base body along the circumferential direction of a side wall, the upper cover body is arranged above the lower base body and comprises a top surface, an outer side surface and a bottom surface, a pit is formed in the top surface, the diameter of the top surface is larger than that of the bottom surface, the outer peripheral edge of the top surface extends downwards obliquely to the outer peripheral edge of the bottom surface to enable the outer side surface to form an inverted cone-shaped flow guide surface, and the diameter of the bottom surface is larger than the maximum diameter of the lower base body to enable the overall diameter of the upper cover body to completely cover the fire holes in the lower base body. On one hand, the small fire cover has a water containing function because the concave pit is formed in the top surface of the upper cover body, and when the pot overflowing phenomenon occurs, liquid dropping on the top surface of the upper cover body can enter the concave pit, so that the liquid is prevented from being poured and extinguished; on the other hand, even when liquid overflows from the pit too much, because back taper flow guide face sets up, liquid can be in back taper flow guide face effect free fall down, more because the diameter of bottom surface is greater than the biggest diameter of pedestal down and makes the whole diameter of upper cover the fire hole on the pedestal down completely, free fall's liquid also can not fall into in the fire hole to eliminated because the fire hole blocks up or the fire extinguishes the potential safety hazard that brings, improved the safety in utilization of combustor.

Illustratively, the outer side surface is provided with a slot facing to the radial direction, and the slot divides the outer side surface into an upper inverted frustum-shaped flow guide surface and a lower inverted frustum-shaped flow guide surface. By the arrangement, on one hand, when liquid drops on the upper inverted frustum-shaped flow guide surface, the original gravity is smaller than the surface tension of the liquid, and the gravity of the liquid is larger than the surface tension of the liquid, so that the free falling of the liquid is ensured; on the other hand, the lower inverted frustum-shaped flow guide surface can ensure that the liquid dripped from the upper inverted frustum-shaped flow guide surface freely falls to other positions on the outer surface of the lower seat body, so that the free-falling liquid is prevented from entering the fire hole.

Illustratively, the slot slopes upward from the outer side surface toward the pocket. So set up, can make things convenient for the fluting processing.

Illustratively, the width of the slot is 0.6mm to 2 mm. Therefore, the surface tension of the liquid can be prevented, the liquid can be more easily dropped, and the free falling of the liquid is ensured.

Illustratively, the minimum diameter of the upper inverted frustum-shaped flow guide surface is larger than the maximum diameter of the lower inverted frustum-shaped flow guide surface, so that the overall diameter of the upper inverted frustum-shaped flow guide surface covers the overall diameter of the lower inverted frustum-shaped flow guide surface. So set up, can avoid the liquid of free fall to get into in the fire hole well.

Illustratively, the fire hole inclines upwards along the direction from the fire hole inlet to the fire hole outlet, and the lower seat body has a frustum-shaped outer side surface on which the fire hole outlet is arranged. So set up, can ensure the gas velocity that is used for providing the flame, thereby improve the thermal efficiency.

Illustratively, the upper end of the frustum-shaped outer side surface is connected with the bottom surface through a transition connecting part, and a fire outlet cavity is formed among the bottom surface, the transition connecting part and the frustum-shaped outer side surface. By the arrangement, even fire outlet under small load can be ensured, and flame does not fly away from the fire hole under large load.

According to another aspect of the present invention, there is also provided a burner comprising any one of the small fire covers as described above.

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 small fire lid according to an exemplary embodiment of the present invention;

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

fig. 3 is a half sectional view of the small fire lid shown in fig. 1.

Wherein the figures include the following reference numerals:

100. a small fire cover; 10. an upper cover body; 11. a top surface; 111. a pit; 12. an outer side surface; 1201. an upper inverted frustum-shaped flow guide surface; 1202. a lower inverted frustum-shaped flow guide surface; 121. grooving; 13. a bottom surface; 20. a lower seat body; 21. a frustum-shaped outer side surface; 30. fire holes; 31. a fire hole outlet; 32. a fire hole inlet; 40. A transition connection; 50. and (4) discharging the fire cavity.

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.

To the easy problem that leads to flame-out that blocks up of fire hole that exists among the prior art, the utility model provides a little fire lid. The fire cover can also adopt such a structure if necessary. In order to understand the present invention as a whole, a burner using the small fire cover will be described first.

For a household gas range, a burner thereof generally has a large fire cover and a small fire cover to form at least two rings of flames, thereby providing a variety 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.

The small fire cover according to an embodiment of the present invention will be described with reference to fig. 1 to 3.

As shown in fig. 1 to 3, the small fire cover 100 includes an upper cover body 10 and a lower base body 20, fire holes 30 are arranged on the lower base body 20 along a circumferential direction of a side wall, the fire holes 30 may be distributed on the lower base body 20 at equal intervals, the fire holes 30 may also be distributed on the lower base body 20 at unequal intervals as required, and two circles of fire holes may be provided along the circumferential direction of the lower base body 20, wherein a cross-sectional area of one circle of fire holes located relatively above is greater than a cross-sectional area of one circle of fire holes located relatively below.

The upper cover 10 is disposed above the lower base 20. The upper cover body 10 comprises a top surface 11, an outer side surface 12 and a bottom surface 13, wherein the top surface 11 is provided with a pit 111, and the pit 111 is mainly used for containing liquid, so that when a pot overflow phenomenon occurs, the liquid can be collected into the pit 111, the liquid collected into the pit 111 can be naturally evaporated in the use process of the burner, and the size and the depth of the pit 111 can be set according to actual requirements, for example, the volume of the pit 111 is generally set to be 5 milliliters. In addition, the diameter h3 of the top surface 11 is greater than the diameter h1 of the bottom surface 13, and the outer periphery of the top surface 11 extends obliquely downward to the outer periphery of the bottom surface 13 to form an inverted frustum-shaped flow guide surface on the outer side surface 12, and the diameter h1 of the bottom surface 13 is greater than the maximum diameter h2 of the lower seat body 20 to make the entire diameter of the upper cover 10 completely cover the fire hole on the lower seat body 20.

Based on the above arrangement, on one hand, the small fire cover 100 has a water containing function because the concave pit 111 is formed on the top surface 11 of the upper cover body 10, and when a pot overflow phenomenon occurs, liquid dropping on the top surface 11 of the upper cover body 10 can enter the concave pit 111, so that fire extinguishment by pouring the liquid is avoided; on the other hand, even when too much liquid overflows from the pit 111, due to the arrangement of the inverted frustum-shaped flow guide surface, the liquid can also fall freely (fall along the direction of arrow a in fig. 3) under the action of the inverted frustum-shaped flow guide surface, and further, because the diameter h1 of the bottom surface 13 is larger than the maximum diameter h2 of the lower seat body 20, the whole diameter of the upper cover body 10 completely covers the fire hole 30 on the lower seat body 20, the free-falling liquid cannot fall into the fire hole 30, so that the potential safety hazard caused by the blockage of the fire hole 30 or the extinguishment of fire is eliminated, and the use safety of the burner is improved.

Illustratively, referring to fig. 2 and 3 in combination, the outer side surface 12 has a radially oriented slot 121, and the slot 121 divides the outer side surface 12 into an upper inverted frustum flow guiding surface 1201 and a lower inverted frustum flow guiding surface 1202. With the arrangement, on one hand, when the liquid drops on the upper inverted frustum-shaped guide surface 1201, the gravity of the liquid is changed from the original gravity being smaller than the surface tension of the liquid to the gravity being larger than the surface tension of the liquid, so that the free falling of the liquid is ensured; on the other hand, the lower inverted frustum-shaped flow guide surface 1202 can ensure that the liquid dropping from the upper inverted frustum-shaped flow guide surface 1201 freely falls to other positions except the outer surface of the lower seat body 20, so that the freely falling liquid is prevented from entering the fire hole 30.

As an exemplary illustration, the slot 121 is inclined upward from the outer side 12 toward the recess 111, that is, the slot 121 is inclined relative to the horizontal plane, so that the slot 121 can be conveniently machined. In an embodiment not shown, the slot 121 may also be arranged horizontally from the outer side 12 in the direction of the recess 111, i.e. the slot 121 is arranged parallel to the horizontal plane.

Illustratively, the width H of the slot 121 is 0.6mm to 2 mm. Therefore, the surface tension of the liquid can be prevented, the liquid can be more easily dropped, and the free falling of the liquid is ensured. For example, the width H of the slot may be 0.6mm, 1mm, 1.5mm, 2mm, etc., if the width H of the slot 121 is less than 0.6mm, when a normal water drop drops down through the slot 121, the slot 121 has almost no influence on the surface tension of the water drop, and the gravity of the water drop is still less than the surface tension of the water drop, so that the water drop is easily absorbed into the slot 121, thereby affecting the free falling body of the liquid; if the width H of the slot 121 is greater than 2mm, when normal water drops drop down through the slot 121, the slot 121 is too large, and the water drops are also easily absorbed into the slot 121, thereby affecting the free falling of the liquid.

Illustratively, the minimum diameter of the upper inverted frustum flow guiding surface 1201 is larger than the maximum diameter of the lower inverted frustum flow guiding surface 1202, so that the overall diameter of the upper inverted frustum flow guiding surface 1201 covers the overall diameter of the lower inverted frustum flow guiding surface 1202. With this arrangement, the freely falling liquid is well prevented from entering the fire hole 30. It should be understood that the minimum diameter of the upper inverted frustum flow guide surface 1201 is the diameter corresponding to the upper end of the slot 121, and the maximum diameter of the lower inverted frustum flow guide surface 1202 is the diameter corresponding to the lower end of the slot 121.

Referring again to fig. 2 and 3, the fire holes 30 are inclined upward in a direction from the fire hole inlet 32 to the fire hole outlet 31, the lower seat 20 has a frustum-shaped outer side 21, and the fire hole outlet 31 is disposed on the frustum-shaped outer side 21. With this arrangement, the gas velocity for supplying the flame can be ensured, thereby improving the heat efficiency, and specifically, after the gas enters the fire hole 30 from the fire hole inlet 32, the gas flows out in an obliquely upward direction, and the upwardly-sprayed flame is generated at the fire hole outlet 31, thereby ensuring the gas velocity for supplying the flame, thereby improving the heat efficiency.

Illustratively, the upper end of the frustum-shaped outer side surface 21 is connected with the bottom surface 13 through the transition connecting part 40, and a fire outlet cavity 50 is formed among the bottom surface 13, the transition connecting part 40 and the frustum-shaped outer side surface 21. By such arrangement, even fire discharge under small load and no flame flying away from the fire hole 30 under large load can be ensured.

According to another aspect of the present invention, there is also provided a burner having any one of the above-mentioned small fire covers. Besides, the burner also comprises a venturi, a distributor and the like. The venturi and the distributor may 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", "horizontal" and "top", "bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are 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 interpreted as limiting the scope of the present invention; the terms "inner" and "outer" refer to the interior and exterior relative to the contours of the components themselves.

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.

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 (8)

1. The utility model provides a little fire lid, includes lid and lower pedestal, it has the fire hole to arrange along the circumferential direction of lateral wall on the pedestal down, it sets up to go up the lid the top of pedestal down, its characterized in that, it includes top surface, lateral surface and bottom surface to go up the lid, the pit has on the top surface, the diameter of top surface is greater than the diameter of bottom surface, just the outer peripheral edges slant downwardly extending of top surface extends to the outer peripheral edges of bottom surface makes the lateral surface forms back taper platform shape water conservancy diversion face, the diameter of bottom surface is greater than the maximum diameter of pedestal makes down the whole diameter of going up the lid covers completely the fire hole on the pedestal down.

2. The small fire cover according to claim 1, wherein the outer side surface is provided with a radially-oriented slot, and the slot divides the outer side surface into an upper inverted frustum-shaped flow guide surface and a lower inverted frustum-shaped flow guide surface.

3. The small fire lid as set forth in claim 2 wherein said slot slopes upwardly from said outer side surface toward said pocket.

4. The small fire lid as claimed in claim 2, wherein the width of the slot is 0.6mm to 2 mm.

5. The small fire cover according to claim 2, wherein the minimum diameter of the upper inverted frustum flow guide surface is larger than the maximum diameter of the lower inverted frustum flow guide surface, so that the overall diameter of the upper inverted frustum flow guide surface covers the overall diameter of the lower inverted frustum flow guide surface.

6. The small fire cover according to any one of claims 1 to 5, wherein the fire holes are inclined upward in a direction from a fire hole inlet to a fire hole outlet, and the lower base body has a frustum-shaped outer side surface on which the fire hole outlet is provided.

7. The small fire cover according to claim 6, wherein the upper end of the frustum-shaped outer side surface is connected with the bottom surface through a transition connecting part, and a fire outlet cavity is formed among the bottom surface, the transition connecting part and the frustum-shaped outer side surface.

8. A burner comprising a small fire cover as claimed in any one of claims 1 to 7.

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