CN112128749A

CN112128749A - Fire cover for combustor and combustor with fire cover

Info

Publication number: CN112128749A
Application number: CN201910555220.3A
Authority: CN
Inventors: 苏慧玲
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-12-25
Anticipated expiration: 2039-06-25
Also published as: CN112128749B

Abstract

The invention relates to a fire cover for a burner and the burner using the fire cover, comprising a top wall, an outer ring wall surface vertically extending downwards from the outer edge of the top wall and an inner ring wall surface vertically extending downwards from the inner edge of the top wall, wherein the top wall, the outer ring wall surface and the inner ring wall surface form a mixed gas cavity together, and the burner is characterized in that: the inner ring wall surface of the fire cover is surrounded with an air supplementing cavity, the inner ring wall surface of the fire cover extends towards the air supplementing cavity to form an air guide channel communicated with the air mixing cavity, and the air guide channel is provided with at least two fire outlets.

Description

Fire cover for combustor and combustor with fire cover

Technical Field

The invention relates to the technical field of household kitchen utensils, in particular to a fire cover for a burner and the burner with the fire cover.

Background

At present, a fire cover of a gas stove generally comprises an inner ring fire cover and a gas mixing chamber, the heating mode of the fire cover to a pot body is basically a mode of combining an external annular flame and an internal annular flame, but the center of the fire ring still has no flame, which can cause the heating effect of the center position of the pot bottom to be poor, therefore, the applicant provides an inner ring fire cover which can integrate an inner ring and a middle ring into a whole and can vertically and upwardly directly spray burning flame, and the burner of the domestic gas stove, as the Chinese utility model with the patent number ZL201420412292.5 (with the granted announcement number of CN204063043U), is disclosed in the patent of 'a fire cover of a household gas stove and a burner applying the fire cover', the fire cover body is provided with an inner ring wall and an outer ring wall, a central through hole is formed in the center of the inner ring wall, an annular channel is formed between the inner ring wall and the outer ring wall, a through hole is formed at the bottom of the annular channel, and the upper cover is of, the structure can lead the combustion of the inner ring fire cover to be concentrated, and the heat loss brought away by the secondary air is less, so the combustion temperature is higher, and the heat efficiency is better; however, since the inner ring fire cover is directly injected vertically upwards, the flow rate of the mixed gas is too high, so that the center of the cooker is easy to blacken, and further improvement on the burner is needed.

In addition, with the development of urban gas industry, the kitchen range industry in China is greatly improved in the aspects of variety, material, performance, sales and the like. The important point in improving the performance is the improvement of the thermal efficiency. The burners of domestic gas cookers are atmospheric burners. The atmospheric burner is designed according to a partial premixing mode, and the primary air coefficient of the atmospheric burner is 0< alpha < 1. The atmospheric burner is divided into a head part and an ejector. The ejector is used for ejecting primary air required by combustion, and the head of the burner is used for uniformly distributing a gas-air mixture to the fire holes and carrying out stable and complete combustion. The gas of the gas stove mainly uses liquefied petroleum gas, natural gas, methane and the like, which are primary energy sources. Taking natural gas as an example, the usage amount of natural gas in China is increasing every year, and some of the natural gas is used for household gas. The majority of household gas is consumed in the cooking utensils, so that the heat efficiency of the cooking utensils is improved, the consumption of gas resources and the emission of greenhouse gas can be reduced, the gas cost of users can be reduced, and the air quality is improved. Therefore, the improvement of the efficiency of the gas stove is one of the struggle targets of the stove industry in China. In the actual use process of the existing gas stove, because a pot is placed on a pot support for heating, and a certain space interval is formed between the pot and a burner, the heat energy generated by gas combustion is used for heating the pot, and a considerable part of the heat energy is dissipated to the surrounding environment, so that energy waste is caused; in order to solve the above problems, heat collection and energy collection are provided in China in recent years, for example, "an energy collection ring for a gas stove and a gas stove with the energy collection ring" disclosed in chinese patent CN203404823U and "an energy collection type gas stove" disclosed in chinese patent CN204042984U, the gas stove is also provided with an energy collection pot support, although the energy collection ring structure can reduce the consumption of heat energy to a certain extent, the gas stove is generally placed in a ventilation place of a kitchen, when the wind force in the external environment is large, the combustion flame of the gas stove may swing and be unstable, sometimes even flameout, and the use is affected. In addition, the existing common gas stove has the phenomena of flameout, ignition failure and the like caused by sliding a pot, overflowing cooking soup into a burner head, a fire hole and the like of a burner.

Disclosure of Invention

The first technical problem to be solved by the present invention is to provide a fire cover for a burner, which is not easy to cause the blackening of the center of a pot, in view of the above-mentioned prior art.

The second technical problem to be solved by the present invention is to provide a fire cover for a burner, which has the functions of collecting heat and concentrating energy and is beneficial to the full combustion of fuel gas, in view of the current state of the prior art.

The third technical problem to be solved by the present invention is to provide a burner with the fire cover and flame evenly distributed, aiming at the current state of the art.

In order to solve the first technical problem, the technical scheme adopted by the invention is as follows: this a fire lid for combustor, including the roof, from the outer lane wall of the vertical downwardly extending of the outside edge of this roof and from the inner circle wall of the vertical downwardly extending of the inside edge of this roof, outer lane wall, inner circle wall form gas mixing chamber, its characterized in that jointly: an air supply cavity is formed by enclosing the inner ring wall surface of the fire cover, an air guide channel communicated with the air mixing cavity extends towards the air supply cavity from the inner ring wall surface of the fire cover, and at least two fire outlet holes are formed in the air guide channel.

In order to prevent the fire outlet on the air guide channel from being gathered at the center of the cooker, preferably, the air guide channel is also provided with an air guide cavity in the center, and the air guide channel is provided with a first through hole communicated with the air guide cavity.

To solve the second technical problem, it is preferable that the top wall has stoppers provided at intervals in the radial direction. Because the pot is arranged on the pot bracket for heating, and a certain space interval is formed between the pot and the burner, the heat energy generated by gas combustion is used for heating the pot, and a considerable part of the heat energy is released to the surrounding environment, thereby causing energy waste; the blocking piece fills the space interval, so that the contact area between the heat energy or the smoke generated by the combustion of the burner and the pot bottom is enlarged, the flame can fully perform effective heat exchange with the pot bottom, and meanwhile, the loss of the flame can be reduced, and the heat energy can be prevented from radiating to the kitchen space.

The blocking member may be formed of rib walls, each of which is formed in a spiral shape as a whole.

Preferably, in order to realize that the smoke generated by the combustion of the burner is discharged from the inside to the outside, the rib wall is arranged along the top wall in a mode of being high outside and low inside. The rib wall located at the outermost periphery only needs to be reserved for discharging the smoke generated in the combustion process of the burner.

In order to realize that the burner heats the pot bottom more uniformly, the wall surface of the outer ring is provided with outer fire holes communicated with the gas mixing cavity at intervals along the circumferential direction.

In order to enable a user to independently control the central fire formed by the inner ring part of the burner and the peripheral fire formed by the outer ring part, the lower surface of the top wall is provided with a baffle plate extending downwards, the baffle plate divides the air mixing cavity into an inner ring air mixing cavity positioned on the inner side and an outer ring air mixing cavity positioned on the outer side, the outer fire holes are communicated with the outer ring air mixing cavity, and the air guide channels correspond to the inner ring air mixing cavity. And because the air guide channel corresponds the inner ring air mixing cavity, because the gas is led in from the inner ring air mixing cavity to the center along the air guide channel, the speed of the gas entering the cover plate with the fire outlet hole is reduced, and the gas and the air are more uniformly distributed on the air guide channel.

In order to solve the third technical problem, it is preferable to provide a burner to which the above fire cover is applied, including a base, wherein: the base is provided with an air supplement channel which is positioned in the center and penetrates up and down and a gas channel which is positioned at the periphery of the air supplement channel;

also includes:

the first connecting body is arranged on the base, the central position of the first connecting body is provided with a vertical annular cavity corresponding to the air supplementing channel, and the peripheral position of the first connecting body is provided with a gas cavity corresponding to the gas channel;

the second connecting body is arranged on the first connecting body and comprises an inner annular wall and an outer annular wall which are concentrically arranged at intervals, a first cavity communicated with the gas cavity is formed between the inner annular wall and the outer annular wall, and a second cavity communicated with the annular cavity is surrounded by the inner annular wall; and

the inner ring wall surface of the fire cover is abutted against the inner ring wall of the second connector, the outer ring wall surface of the fire cover is abutted against the outer ring wall of the second connector, and the air guide channel corresponds to the second cavity.

In order to facilitate the installation of the integral burner, the air guide channel is composed of an air guide groove with an open mouth part and a cover plate covering the open mouth part of the air guide groove, and the fire outlet is arranged on the cover plate.

In order to realize the fire uniformity of the burner from the outer periphery to the center, the inner ring wall is provided with second through holes for the gas in the first cavity to flow out at intervals along the circumferential direction, and the inner ring wall also extends towards the second cavity to form the gas guide groove communicated with the first cavity.

In order to achieve the uniformity of the flame outlet of the burner from the outer periphery to the center, the staggered arrangement of the air in a circle is achieved, and preferably, the groove wall of the air guide groove is provided with at least two third through holes for the gas in the first cavity to flow out. Air is arranged at the inner periphery of the third through hole, and air is distributed between the first through hole and the second through hole to form air-fuel gas interval uniform distribution.

Furthermore, the cover plate is formed by extending the inner ring wall surface of the fire cover towards the air replenishing cavity.

Compared with the prior art, the invention has the advantages that the fire cover is provided, the air guide channel communicated with the air mixing cavity extends from the wall surface of the inner ring of the fire cover, and the air guide channel is provided with at least two fire outlets, so that the gas is guided from the air mixing cavity to the center along the air guide channel, the speed of the gas entering the fire outlets is reduced, the gas and the air are more uniformly distributed on the air guide channel, and the center of a cooker is prevented from being blackened The annular cavity and the second cavity further help the gas and air to be distributed more evenly on the cover plate with the fire outlet holes, so that the flame is evenly spread on the cover plate with the fire outlet holes to form short flames, the flame is not easy to fly, the combustion efficiency is increased, and the heat load of the combustor is improved.

Drawings

FIG. 1 is a schematic view of a burner in accordance with embodiment 1 of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is an exploded view of FIG. 1;

fig. 4 is a schematic structural view of a first connecting body in embodiment 1 of the present invention;

FIG. 5 is a schematic structural view of a fire cover in embodiment 1 of the present invention;

fig. 6 is a schematic structural diagram of a second connector in embodiment 1 of the present invention.

FIG. 7 is a schematic view showing the construction of a fire cover in embodiment 2 of the present invention (with the cover plate omitted);

fig. 8 is a schematic structural view of a fire cover in embodiment 3 of the present invention (the cover plate is omitted).

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

Example 1

As shown in FIGS. 1 to 6, the preferred embodiment of the present invention is shown. In this embodiment, the fire cover for the burner includes a top wall 1, an outer ring wall 11 extending vertically and downwardly from an outer edge of the top wall 1, and an inner ring wall 12 extending vertically and downwardly from an inner edge of the top wall 1, the outer ring wall 11, and the inner ring wall 12 together form a gas mixing chamber 13, the inner ring wall 12 of the fire cover encloses a gas supplementing chamber 121, an air guide channel 2 communicated with the gas mixing chamber 13 extends into the gas supplementing chamber 121 from the inner ring wall 12 of the fire cover, and at least two fire outlets 21 are formed in the air guide channel 2. In order to prevent the fire hole 21 of the air guide channel 2 from being concentrated at the center of the cookware, it is preferable that the air guide channel 2 further has an air guide chamber 3 at the center thereof, and the air guide channel 2 has a first through hole 22 communicating with the air guide chamber 3. The top wall 1 has blocking members spaced radially, the blocking members of this embodiment are rib walls 4, and each rib wall 4 is spiral. Because the pot is arranged on the pot bracket for heating, and a certain space interval is formed between the pot and the burner, the heat energy generated by gas combustion is used for heating the pot, and a considerable part of the heat energy is released to the surrounding environment, thereby causing energy waste; the rib walls 4 fill the space interval, so that the contact area between the heat energy or the smoke generated by the combustion of the burner and the pan bottom is increased, the flame can fully perform effective heat exchange with the pan bottom, and the loss of the flame can be reduced, thereby preventing the heat energy from radiating to the kitchen space. In order to discharge the smoke generated by the combustion of the combustor from inside to outside, the rib walls 4 are arranged along the top wall 1 in a high-outside and low-inside mode, and the rib walls 4 located at the outermost periphery only need to be reserved to discharge the smoke generated in the combustion process of the combustor. In addition, in order to realize that the burner heats the pot bottom more uniformly, the outer ring wall surface 11 is provided with outer fire holes 111 communicated with the gas mixing cavity 13 at intervals along the circumferential direction. And in order to make the user control the central fire that the inner ring portion of combustor formed and the outer peripheral fire that the outer ring portion formed separately, the baffle 10 that the lower surface of roof 1 extends downwards, baffle 10 separates air-mixing chamber 13 into relatively independently, lie in inboard inner ring air-mixing chamber 131 and lie in outside outer ring air-mixing chamber 132, outer fire hole 111 communicates outer ring air-mixing chamber 132, air guide channel 2 corresponds inner ring air-mixing chamber 131, and because air guide channel 2 corresponds inner ring air-mixing chamber 131, because the gas is leading-in from inner ring air-mixing chamber 131 to the centre along air guide channel 2, the speed that the gas got into the apron 25 that has fire outlet 21 has been reduced, help gas and air to distribute more evenly on air guide channel 2.

The embodiment also provides a burner with the fire cover, which comprises a base 5, wherein the base 5 is provided with an air supplementing channel 51 which is positioned in the center and penetrates up and down, and a gas channel 52 which is positioned on the periphery of the air supplementing channel 51, the burner also comprises a first connecting body 6 which is arranged on the base 5, the center of the first connecting body 6 is provided with a vertical annular cavity 61 corresponding to the air supplementing channel 51, and the periphery of the first connecting body 6 is provided with a gas cavity 62 corresponding to the gas channel 52; and the second connecting body 7 comprises an inner ring wall 71 and an outer ring wall 72 which are concentrically arranged at intervals, a first cavity 73 communicated with the gas cavity 62 is formed between the inner ring wall 71 and the outer ring wall 72, the inner ring wall 71 is surrounded to form the second connecting body 7 with a second cavity 711 communicated with the annular cavity 61, the inner ring wall surface 12 of the fire cover is abutted against the inner ring wall 71 of the second connecting body 7, the outer ring wall surface 11 of the fire cover is abutted against the outer ring wall 72 of the second connecting body 7, and the air guide channel 2 corresponds to the second cavity 711. In order to facilitate the installation of the integral burner, the air guide channel 2 is composed of an air guide groove 20 having an open mouth and a cover plate 25 covering the open mouth of the air guide groove 20, and the fire outlet 21 is opened on the cover plate 25. Wherein the inner ring wall 71 is provided with second through holes 712 for the gas in the first cavity 73 to flow out at intervals along the circumferential direction, the inner ring wall 71 further extends to the second cavity 711 to form air guide grooves 20 communicated with the first cavity 73, so as to realize the uniformity of the burner in the fire from the outer periphery to the center, and also to realize the uniformity of the burner in the fire from the outer periphery to the center, the staggered arrangement of a circle of air in the gas is realized, preferably, the groove wall of the air guide grooves 20 is provided with at least two third through holes 201 for the gas in the first cavity 73 to flow out, that is, the inner periphery forming the third through holes 201 is provided with air, and the air is distributed between the first through holes 22 and the second through holes 712, so as to form the uniform distribution of the air and the gas at intervals. Finally, the cover plate 25 in this embodiment is formed by extending the inner ring wall 12 of the fire cover to the gas supplementing cavity 121.

As described above, the path of the primary air, gas and the mixed primary air and gas inside the burner is as follows, in order to enable the user to control the central fire and the outer fire individually, the gas passage 52 of the base 5 is divided into the inner ring gas passage 521 communicated with the inner ring gas mixing chamber 131 and the outer ring gas passage 522 communicated with the outer ring gas mixing chamber 132, the gas chamber 62 of the first connecting body 6 correspondingly disposed above the base 5 is also divided into the inner and outer gas chambers 62, i.e., the inner gas chamber 621 and the outer gas chamber 622, similarly, the first chamber 73 of the second connecting body 7 disposed above the first connecting body 6 is also divided into the inner and outer two chambers, i.e., the first inner chamber 731 and the first outer chamber 732, and the primary air and gas required for the central fire formed by the cover plate 25 having the fire outlet 21 at the top are divided by the inner ring gas passage 52 through the inner gas chamber 62, After entering the inner ring air mixing chamber 131, the first inner chamber respectively flows out through the first through hole 22 of the second connecting body 7 and through the second through hole 712 and the third through hole 201 along the air guide channel 2, and the air surrounding the first through hole 22, the second through hole 712 and the third through hole 201 comes from the air supplement channel 51, the annular chamber 61 and the second chamber 711 of the base 5 from bottom to top, thereby facilitating the gas and air to be more uniformly distributed on the cover plate 25 with the fire outlet 21 to form a circle of gas and a circle of air uniform distribution form, and the primary air and the gas required by the outer fire enter the outer gas chamber 62 and the first outer chamber from the outer ring gas channel 52 and flow into the outer fire hole 111, the outer fire hole 111 is ignited together with the external secondary air to form the outer fire, if the sizes of the outer fire and the central fire are adjusted, the adjusting valve connected to the air inlet end of the input channel is adjusted, the rib wall 4 on the top wall 1 can increase the contact area between the heat energy or the flue gas generated by the burner and the pan bottom, so that the flame can fully exchange heat with the pan bottom, and simultaneously can reduce the loss of flame, prevent the heat energy from radiating to the kitchen space, and finally, in order to supply secondary air to the outer fire holes 111 from inside to outside, the first connecting body 6 is also provided with a flow guide channel 60 which can guide the secondary air in the air supply channel 51 to the outside of the outer ring wall surface 11.

Example 2

The structure is basically the same as that of the embodiment 1, and the only difference is that: the blocking piece comprises at least two pairs of V-shaped blocking units 4 'which are arranged from the inner side edge to the outer side edge along the upper surface of the annular top wall at intervals along the radial direction, surround a circle and have openings facing the outer annular wall, and each V-shaped blocking unit comprises at least two smoke guide holes 41' which are distributed along the radial direction and are used for smoke to flow out, as shown in figure 7.

Example 3

The structure is basically the same as that of the embodiment 2, and the only difference is that: in order to realize the discharge of the flue gas, gaps 41 'are arranged between the adjacent V-shaped blocking units 4', as shown in FIG. 8.

Claims

1. The utility model provides a fire lid for combustor, including roof (1), from the outer lane wall (11) of the vertical downwardly extending in outside edge of this roof (1) and from the inner circle wall (12) of the vertical downwardly extending in inside edge of this roof (1), outer lane wall (11), inner circle wall (12) form gas mixing chamber (13) jointly, its characterized in that: an air supplementing cavity (121) is formed by enclosing the inner ring wall surface (12) of the fire cover, an air guide channel (2) communicated with the air mixing cavity (13) extends towards the air supplementing cavity (121) from the inner ring wall surface (12) of the fire cover, and at least two fire outlets (21) are formed in the air guide channel (2).

2. A fire cover for a burner as claimed in claim 1, wherein: the center of the air guide channel (2) is also provided with an air guide cavity (3), and the air guide channel (2) is provided with a first through hole (22) communicated with the air guide cavity (3).

3. A fire cover for a burner as claimed in claim 2, wherein: the top wall (1) of the fire lid has blocking elements (4; 4') arranged at radial intervals.

4. A fire cover for a burner as claimed in claim 3, wherein: the barrier member is a rib wall (4), and each rib wall (4) is spiral.

5. A fire cover for a burner as claimed in claim 4, wherein: the rib wall (4) is arranged along the top wall (1) in a mode of high outside and low inside.

6. A fire cover for a burner according to any one of claims 1 to 5, wherein: and the outer ring wall surface (11) is provided with outer fire holes (111) communicated with the gas mixing cavity (13) at intervals along the circumferential direction.

7. A fire cover for a burner as claimed in claim 6, wherein: the lower surface of the top wall (1) extends downwards, the air mixing cavity (13) is divided into an inner ring air mixing cavity (131) and an outer ring air mixing cavity (132) by the partition plate (10), the inner ring air mixing cavity and the outer ring air mixing cavity are independent of each other and located on the inner side, the outer fire holes (111) are communicated with the outer ring air mixing cavity (132), and the air guide channels (2) correspond to the inner ring air mixing cavity (131).

8. Burner with a fire cover according to any of claims 1 to 7, comprising a base (5), characterized in that: the base (5) is provided with an air replenishing channel (51) which is positioned in the center and penetrates up and down and a gas channel (52) which is positioned at the periphery of the air replenishing channel (51);

also includes:

a first connecting body (6) arranged on the base (5), wherein the central position of the first connecting body (6) is provided with a vertical annular cavity (61) corresponding to the air supplement channel (51), and the peripheral position of the first connecting body (6) is provided with a gas cavity (62) corresponding to the gas channel (52);

the second connecting body (7) is arranged on the first connecting body (6), the second connecting body (7) comprises an inner annular wall (71) and an outer annular wall (72) which are concentrically arranged at intervals, a first cavity (73) communicated with the gas cavity (62) is formed between the inner annular wall (71) and the outer annular wall (72), and the inner annular wall (71) is surrounded to form a second cavity (711) communicated with the annular cavity (61); and

the inner ring wall surface (12) of the fire cover is abutted against the inner ring wall (71) of the second connecting body (7), the outer ring wall surface (11) of the fire cover is abutted against the outer ring wall (72) of the second connecting body (7), and the air guide channel (2) corresponds to the second cavity (711).

9. The burner of claim 8, wherein: the air guide channel (2) is composed of an air guide groove (20) with an open opening and a cover plate (25) covering the open opening of the air guide groove (20), and the fire outlet (21) is formed in the cover plate (25).

10. The burner of claim 9, wherein: second through holes (712) for gas in the first cavity (73) to flow out are formed in the inner annular wall (71) at intervals along the circumferential direction, and the air guide groove (20) communicated with the first cavity (73) extends towards the second cavity (711).

11. The burner of claim 10, wherein: the wall of the gas guide groove (20) is provided with at least two third through holes (201) for the gas in the first cavity (73) to flow out.

12. The burner of claim 11, wherein: the cover plate (25) is formed by extending the inner ring wall surface (12) of the fire cover to the air replenishing cavity (121).