CN101666500A - Upper inlet wind type burner - Google Patents

Abstract

The invention discloses an upper air intake burner, which comprises a central fire cover and an outer fire cover, a furnace head, a base and a gas distribution pipe arranged sequentially from top to bottom. There is a gas mixing chamber, a gas nozzle is provided on the gas distribution pipe, a gas distribution piece is provided between the outer fire cover and the burner head, and a fire cover seat is provided between the central fire cover and the burner head, and the fire cover seat is a tube structure with a stepped inner hole. The invention starts from the two aspects of controlling the temperature of the burner body and improving the size, greatly reduces the difference between the cold state and the hot state of the upward air intake burner, and can fundamentally solve the phenomenon of gas and air stratification, and the flame is short and powerful , there will be no defects such as yellow flames and tempering, not only small size, large heat load, excellent combustion conditions, but also prevent nozzle clogging.

Description

up air burner

technical field

The invention relates to the technical field of gas stoves, and more specifically relates to an upward air intake burner.

Background technique

Since domestic manufacturers introduced pure upward air intake burners from abroad in the late 1990s, they were quickly accepted by the market because of their simple and beautiful appearance. After domestic manufacturers have launched pure upward air intake burners with independent intellectual property rights , There are more upward air-intake burners on the market, but they all have defects such as poor combustion conditions, weak flames, and easy yellow flames. Although some patents have made some improvements to address these defects, due to the poor heat dissipation performance of the upward air combustion system, the temperature of the burner will gradually increase with the prolongation of use time, resulting in a double increase in the viscosity of the gas near the burner. The thermal resistance increases, which in turn leads to a decrease in the thermal load, so the thermal load of the upward air intake burner in the cold state and the hot state differs greatly, and some even reach a 40% gap. This situation has brought great difficulties to the design of the upper air intake burner. If the air intake and intake air volume of the burner are designed according to the cold state, the air intake volume will be insufficient due to a sharp increase in air viscosity after working for a period of time. A yellow flame phenomenon occurs; if the air intake and intake air volume of the burner are designed according to the thermal state, the flame will be weak when the burner starts to work, and it is easy to cause inconsistent flame heights. At present, there is no effective method to solve this problem. We can only compromise a situation between the cold state and the hot state to design the upper air intake burner.

Contents of the invention

The present invention provides an upward air intake burner in order to solve the deficiencies of the prior art. It starts from the two aspects of controlling the temperature of the burner body and improving the size, and greatly reduces the difference between the cold state and the hot state of the upward air intake burner. , can fundamentally solve the phenomenon of gas and air stratification, the flame is short and powerful, there will be no defects such as yellow flames and tempering, not only small size, large heat load, excellent combustion conditions, but also prevent nozzle clogging.

The present invention adopts the following technical solutions to achieve the above object: an upper air intake burner, including a central fire cover and an outer fire cover, a burner head, a base and a gas distribution pipe arranged sequentially from top to bottom, and the burner head is provided with A plurality of injection pipes, a gas mixing chamber is provided on the base, and a gas nozzle is provided on the gas distribution pipe. The bottom of the groove is provided with a positioning hole matched with the ejector tube, and the upper end of the annular groove of the gas distributor is provided with an outward folded edge. The gas distributor is installed on the burner through the positioning hole, and the outer fire cover covers On the gas sheet; a fire cover seat is provided between the central fire cover and the burner head, and the fire cover seat is a cylindrical structure with a stepped inner hole.

As a further description of the above scheme, the top of the injection tube is provided with a circular boss, the inner diameter of the circular boss is Φ ₁ , the outer diameter is Φ ₂ , and the height is H ₁ . , the distance between the lower surface of the central fire cover is D ₁ , the distance between the outer edge of the circular boss and the inner surface of the outer fire cover and the central fire cover is D ₂ , where Φ ₂ =k ₁ Φ ₁ , Φ ₁ =k ₂ D ₁ , D ₁ ≤ 3.8 mm, D ₂ ≥ D ₁ , k ₁ ∈ [2.08, 2.29], k ₂ ∈ [3.9, 4.1], H ₁ ∈ [2, 7] mm.

The outer fire cover is a ring-shaped cover structure, and its inner edge is provided with a slope structure, and a plurality of fire holes are arranged on the slope, and the lower end of the outer edge of the outer fire cover is provided with fire teeth, and the fire teeth are groove-shaped structure, the angle between the groove and the horizontal plane is α, and the angle between the groove and the diameter of the outer fire cover on the horizontal plane is β, 20°≤α≤35°, 10°≤β≤20°.

The furnace head is in the shape of a ring-shaped cover, and a cross-shaped reinforcing rib is provided in the middle of the furnace head. The central part of the reinforcing rib is vertically provided with an ejector tube, and a plurality of guiding tubes are also vertically arranged on the ring structure of the furnace head. The injection tube, the tube hole of the injection tube is a tapered hole structure with an inner diameter that is small at the top and large at the bottom.

A gasket is arranged between the gas distributor and the burner, and the gasket is in an annular structure. The gasket is placed on the ejector tube and installed between the gas distributor and the burner.

The base is a bowl-shaped structure with an edge. The base is divided into a gas mixing chamber corresponding to the injection pipe. A small hole is provided at the bottom of the gas mixing chamber corresponding to the injection pipe. The small hole is installed with a gas distribution pipe. A connected gas nozzle, the distance between the outlet end of the gas nozzle and the lower end surface of the injection pipe is H ₂ , H ₂ ∈ [6, 10] mm.

The beneficial effect that the present invention can reach by adopting above technical scheme is:

1. The present invention is equipped with a gas distributor and a fire cover seat to separate the fire cover from the burner head, so that the high temperature generated by the fire cover during operation is difficult to transfer to the burner head, thus greatly reducing the burner's cold state. The gap between the working condition and the hot state makes the work of the burner more stable.

2. The present invention establishes a functional relationship and a corresponding value range for each key dimension of the burner, and the repeated experiment data shows that the functional relationship and the value range provided by the present invention are used to determine the value of the relevant parameters, which is different from the existing Compared with the up-inflow burner with advanced technology, the performance is obviously improved. Not only the injection tube has a strong ejection force, but also can ensure that the gas and air are fully mixed, and the flame is short and powerful, and there will never be defects such as yellow flames and tempering. It also prevents nozzle clogging.

3. In addition to being provided with a fire hole in the center fire cover, the present invention also has a fire hole in the inner edge of the outer fire cover, and a fire tooth with a spatial composite angle is also provided on the outer edge of the outer fire cover, which ensures that the flames are at different levels. The secondary air supply does not interfere with each other, so that the combustion is more complete, and the flame generated by the fire teeth spirals up, which increases the time for heat exchange with the bottom of the pot, and further improves the efficiency of the burner.

4. The base of the present invention is provided with a plurality of gas mixing chambers, and each gas mixing chamber cooperates with a gas nozzle on the gas distribution pipe, so that the air injected by each gas nozzle is not affected by other gas nozzles. The mixing of air is more sufficient and uniform, and the combustion conditions are more ideal.

5. In the present invention, a sealing gasket is provided between the gas distributor and the burner head seat, so that the air supply paths of the outer fire cover and the central fire cover are separated from each other without interfering with each other, so that not only the combustion of the central fire is more complete, It also makes the outer fire cover and the center fire cover can be adjusted independently.

Description of drawings

Fig. 1 shows the exploded schematic view of the present invention;

Figure 2 is a schematic cross-sectional view of the present invention;

Fig. 3 shows the schematic top view of the gas distributor of the present invention;

Fig. 4 shows the schematic bottom view of the outer fire cover of the present invention;

Fig. 5 is a schematic cross-sectional view of the outer fire cover of the present invention.

Explanation of reference signs: 1. Central fire cover, 2. Outer fire cover, 3. Furnace head, 4. Base, 5. Gas distribution pipe, 6. Fire cover seat, 7. Gas distributor, 8. Gasket, 9 . Boss, 10. Gas nozzle, 11. Ejector tube, 12. Fire tooth, 13. Fire hole.

Detailed ways

Embodiment one

As shown in Figures 1 to 5, the present invention discloses an upper air intake burner, which includes a central fire cover and an outer fire cover, a burner head, a base and a gas distribution pipe arranged sequentially from top to bottom, and the burner head is provided with Five injection pipes, the base is provided with a gas mixing chamber, the gas distribution pipe is provided with five gas nozzles, and a gas distributor is provided between the outer fire cover and the burner head. The gas distributor is in the shape of an annular groove. The bottom is provided with a positioning hole matched with the ejection tube, and the upper end of the annular groove of the gas distributor is provided with an outward fold, the gas distributor is installed on the burner through the positioning hole, and the outer fire cover is covered on the gas distributor ; There is a fire cover seat between the center fire cover and the furnace head, the fire cover seat is a cylindrical structure, and its inner hole is stepped. There is a circular boss on the top of the injection tube. The inner diameter of the circular boss is Φ ₁ , the outer diameter is Φ ₂ , and the height is H ₁ . The distance is D ₁ , the distance D ₂ between the outer edge of the circular boss and the inner surface of the outer fire cover and the center fire cover, where Φ ₂ =k ₁ Φ ₁ , Φ ₁ =k ₂ D ₁ , D ₁ ≤3.8mm, D ₂ ≥ D ₁ , k ₁ ∈ [2.08, 2.29], k ₂ ∈ [3.9, 4.1], H ₁ ∈ [2, 7] mm. In this embodiment, H ₁ =4.5mm, D ₂ =D1=2.7mm, k ₂ =4.0, k ₁ =2.19, Φ ₁ =10.85mm, Φ ₂ =23.76mm. The outer fire cover is a ring-shaped cover structure, and its inner edge is provided with a slope structure. There are multiple fire holes on the slope. The lower end of the outer edge of the outer fire cover is provided with a fire tooth. The fire tooth is a groove-shaped structure. The included angle between the groove and the horizontal plane is α, and the included angle with the diameter of the outer fire cover on the horizontal plane is β. In this embodiment, α=30° and β=15°. The furnace head is a ring-shaped cover-shaped structure, and a cross-shaped reinforcing rib is provided in the middle of the furnace head. An ejector tube is arranged perpendicular to the middle of the reinforcing rib, and four ejector tubes are vertically arranged on the annular structure of the furnace head. Tube, the tube hole of the injection tube is a tapered hole structure with an inner diameter that is small at the top and large at the bottom. A gasket is arranged between the gas distributor and the furnace head, and the gasket is in an annular structure. The gasket is sleeved on the ejector tube and installed between the gas distributor and the furnace head. The base is a bowl-shaped structure with an edge. The base is divided into a gas mixing chamber corresponding to the injection pipe. A small hole is provided at the bottom of the gas mixing chamber corresponding to the injection pipe. The small hole is installed with a gas distribution pipe. For the connected gas nozzle, the distance between the outlet end of the gas nozzle and the lower end surface of the injection pipe is H ₂ , H ₂ =8mm. In this embodiment, the values of each key dimension are not in the middle value, so the performance of this embodiment is relatively stable, the injection tube has strong ejection force, the gas and air are fully mixed, the flame is short and powerful, and there is no yellowing. Flame, tempering and other defects.

Embodiment two

In this embodiment, the values of each parameter are limit values: H ₁ =2mm, D ₂ =D ₁ =2.6mm, k ₂ =3.9, k ₁ =2.08, Φ ₁ =10mm, Φ ₂ =20.8mm, H ₂ =6mm, except that, all the other structures and functions are consistent with Embodiment 1. Although the value in this embodiment is the minimum limit value, the performance of the burner is still significantly improved compared with similar products, and it can still ensure that the injection tube has a strong injection force, the gas and air are fully mixed, and the flame is short and powerful. There are no defects such as yellow flame and tempering. If the value is further reduced, minor defects will develop into major defects.

Embodiment Three

In this embodiment, each parameter takes the maximum limit value: H ₁ =7mm, D ₂ =D ₁ =2.4mm, k ₂ =4.1, k ₁ =2.29, Φ ₁ =10mm, Φ ₂ =22.9mm, H ₂ =10mm, except for this, the other structures and functions are consistent with the first embodiment. This embodiment can also ensure strong ejection force of the ejector tube, sufficient mixing of gas and air, short and powerful flame, and no defects such as yellow flame and tempering. If the value is further increased, defects will start to appear.

The above embodiments are burners designed using the functional relationship and value range provided by the present invention, and their working conditions and work efficiency can reach a relatively good state. The following table shows that the functional relationship and value range provided by the present invention are not adopted. Burners designed for the value range, they have more or less defects, as shown in the following table:

parameters D(mm) k H(mm) Defects and their causes one D ₁ =2.0mm D ₂ =3.0mm k ₁ =2.19k ₂ =4.0 H ₁ =4.5mmH ₂ =8.0mm As a result, the flame was weak and weak. After 15 minutes of burning, a yellow flame appeared. The main reason was that D1 was too small, the resistance increased, and the primary air was not enough two D ₁ =3.0mm D ₂ =2.0mm k ₁ =2.19k ₂ =4.0 H ₁ =4.5mmH ₂ =8.0mm As a result, the flame was weak and had a yellow flame, and the flame height was inconsistent. The main reason was that D2 was too small to cause uneven pressure on the head, and the flame height was inconsistent. At the same time, D1 was too large, resulting in insufficient mixing and yellow flames. three D ₁ =2.5mm D ₂ =3.0mm k ₁ =2.19k ₂ =4.0 H ₁ =10.0mmH ₂ =8.0mm After burning for 15 minutes, there is a relatively serious tempering phenomenon, which is mainly caused by the large H1 Four D ₁ =2.5mm D ₂ =3.0mm k ₁ =2.19k ₂ =4.0 H ₁ =10.0mmH ₂ =4.0mm As a result, a relatively serious yellow flame phenomenon appeared, the main reason is that the gas nozzle is close to the lower end of the injection pipe, and the injection force is insufficient, resulting in insufficient primary air

The above-mentioned embodiments and the accompanying drawings are only a part of the preferred embodiments of the present invention, and the present invention cannot be limited thereto. Under the condition of not departing from the essence of the present invention, any changes made by those skilled in the art belong to this invention. protection scope of the invention.

Claims (6)

1. upper inlet wind type burner, comprise the middle internal heat lid and outer fire cover, burner, base and the gas distribution pipe that are provided with in turn from top to bottom, burner is provided with many induction tunnels, base is provided with mixing chamber, gas distribution pipe is provided with gas nozzle, it is characterized in that: between outer fire cover and burner, be provided with gas separating piece, this gas separating piece is the annular groove-shaped structure, its bottom land is provided with the locating hole that cooperates with induction tunnel, the upper end, cannelure outer of this gas separating piece is provided with outside flanging, gas separating piece is installed on the burner by locating hole, and outer fire cover covers on gas separating piece; Be provided with fiery cage between middle internal heat lid and burner, this fire cage is a tubular structure, and its endoporus is stepped.

2. upper inlet wind type burner according to claim 1 is characterized in that: described induction tunnel top is provided with round boss, and the internal diameter of round boss is Φ ₁, external diameter is Φ ₂, highly be H ₁, the distance H of nozzle exit end and induction tunnel lower surface ₂, the distance between round boss top and outer fire cover, the middle internal heat lid lower surface is D ₁, the distance D of round boss outer rim and outer fire cover, middle internal heat lid medial surface ₂, Φ wherein ₂=k ₁Φ ₁, Φ ₁=k ₂D ₁, D ₁≤ 3.8mm, D ₂〉=D ₁, k ₁∈ [2.08,2.29], k ₂∈ [3.9,4.1], H ₁∈ [2,7] mm, H ₂∈ [6,10] mm.

3. upper inlet wind type burner according to claim 2, it is characterized in that: described outer fire cover is the annular lid-like, its inner rim is provided with ramp structure, be provided with a plurality of fire holes on this inclined-plane, outer fire cover outer rim lower end is provided with fiery tooth, and this fire tooth is the channel form structure, the angle of this groove and horizontal plane is α, with the angle of diameter on horizontal plane of outer fire cover be β, 20 °≤α≤35 °, 10 °≤β≤20 °.

4. upper inlet wind type burner according to claim 1, it is characterized in that: described burner is the annular lid-like, be provided with criss-cross reinforcement at the burner medium position, this perpendicular induction tunnel that is provided with in reinforcement middle part, also vertically be provided with a plurality of induction tunnels on the burner loop configuration, the pore of this induction tunnel is the up-small and down-big taper hole structure of internal diameter.

5. upper inlet wind type burner according to claim 1 is characterized in that: be provided with sealing gasket between described gas separating piece and the burner, the sealing pad is a loop configuration, and the sealing cushion cover is being installed on the induction tunnel between gas separating piece and the burner.

6. upper inlet wind type burner according to claim 1, it is characterized in that: described base is the bowl shaped structure that has the edge, corresponding induction tunnel branch is separated with mixing chamber in this base, the position of the corresponding induction tunnel in this mixing chamber bottom is provided with aperture, the gas nozzle that is communicated with gas distribution pipe is installed on this aperture, and the distance of this gas nozzle port of export and induction tunnel lower surface is H ₂, H ₂∈ [6,10] mm.

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