A stove burner

Abstract

The invention discloses a stove burner which adopts a fire cover with multiple air channels and annular fire holes, has good primary air injection capability and secondary air driving capability, and fully burns gas. It has the characteristics of low smoke, high load, high efficiency, small burner and low cost.

Description

Technical Field

[0001] The present invention relates to a gas stove, in particular to a gas stove burner. Background Art

[0002] Gas stoves are essential kitchen appliances for cooking, and the burner is a crucial component of gas stoves. Thermal efficiency and CO concentration in dry flue gas are two key performance indicators for household gas stoves. For example, the national standard GB16410-2020, "Household Gas Stoves," stipulates a thermal efficiency of ≥55% and a CO concentration in dry flue gas of ≤0.05%. GB30720-2014, "Energy Efficiency Limits and Energy Efficiency Grades for Household Gas Stoves," stipulates a first-level thermal efficiency of ≥63%. The group standard T / CNHA1023-2020, "Leader Standard Evaluation Requirements for Household Gas Stoves," stipulates that the advanced level requires a thermal efficiency of ≥70% and a CO concentration in dry flue gas of ≤0.03%. Therefore, ensuring complete combustion of gas, reducing harmful flue gas emissions, and improving stove thermal efficiency are crucial.

[0003] The national standard GB16410-2020 "Household Gas Stoves" stipulates that the rated heat load of a single burner is ≤5.23kW. According to domestic cooking habits, many stoves are currently trying to increase the heat load as much as possible. However, increasing the heat load will usually increase the CO concentration in the dry flue gas. Therefore, it is difficult to meet high load, high efficiency and low flue gas at the same time. Summary of the Invention

[0004] The purpose of the present invention is to improve the defects of the prior art and provide a stove burner with a simple structure, which can meet the requirements of large load, high efficiency, low smoke and relatively low cost.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions: A burner, wherein an ejector tube is connected to a head, the head including a circumferential gas channel and at least one upward gas branch channel connected to the gas channel, a fire cover seat being placed on the gas branch channel, a fire cover being placed on the fire cover seat, the hollow portion being a gas mixing chamber, the fire cover including a fire cover outer ring and a fire cover inner ring, the fire cover outer ring and the fire cover inner ring forming a uniform upward gas outlet channel connected to the gas mixing chamber, the gas outlet channel terminating in an annular fire hole.

[0006] Furthermore, the angle between the axis of the annular flame hole and the central axis of the flame cover is 45° to 65°. If the angle is too small, the high-temperature flue gas behind the pot will experience increased flow losses, reducing thermal power and the ability to bring in secondary air. If the angle is too large, the air-carrying capacity will be enhanced, but the flame will spread outward, shifting the high-temperature zone outward, reducing the heated area and decreasing efficiency.

[0007] Furthermore, the ejector tube is a top-bottom split structure, consisting of an ejector tube upper portion and an ejector tube lower portion.

[0008] Furthermore, the head is a top-bottom split-type structure, consisting of an upper head portion and a lower head portion; the upper portion of the ejector tube is integral with the upper portion of the head, and the lower portion of the ejector tube is integral with the lower portion of the head, and the parting surface of the ejector tube and the head is coplanar. This simplifies the manufacturing process and effectively reduces production costs.

[0009] Furthermore, it also includes a fire dividing device that divides the annular flame burning in the annular fire hole into segments to avoid interference between the flame and the pot legs of the pot support, greatly reducing the temperature of the flue gas and the pot support, reducing heat loss, and improving thermal efficiency and durability of the pot support.

[0010] Furthermore, the fire separation device is a fire separation ring, which consists of a bottom ring and a fire separation plate connected thereto. The bottom ring is placed on the inner ring of the fire cover seat, and the fire separation plate is tightly attached to the inner wall of the inner ring of the fire cover in the annular fire hole and has a gap with the outer ring of the fire cover.

[0011] Furthermore, a fire dividing ring positioning groove is provided on the inner ring of the fire cover seat.

[0012] Furthermore, the fire cover outer ring and the fire cover inner ring are respectively riveted and fastened to the fire cover seat.

[0013] Furthermore, there are three gas distribution channels connected to the ejector pipe arranged circumferentially, namely the first gas distribution channel, the second gas distribution channel, and the third gas distribution channel, so that the gas is mixed and distributed more evenly.

[0014] Furthermore, the cross-sectional area of ​​the third sub-airway is smaller than that of the first sub-airway.

[0015] The stove burner of the present invention has excellent primary air injection capability and adopts a multi-channel structure to achieve more uniform mixing and distribution of gas, thereby evenly burning the annular flame of the annular fire hole. Due to the narrow gap between the annular fire holes, the annular flame is very thin, which has a strong ability to introduce secondary air, ensuring full combustion of gas, high thermal efficiency, and very low smoke emissions. On this basis, the burner's heat load can be increased and the diameter of the burner port can be reduced. The smaller burner port also heats the pot closer to the center, increasing the heated area and further improving thermal efficiency. Compared with the existing technology, the burner of the present invention as a whole has the characteristics of low smoke, high load, high efficiency, small burner port, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a stove burner of the present invention.

[0017] Figure 2 It is a schematic diagram of an ejector tube with an upper and lower parting combination structure.

[0018] Figure 3 It is a schematic diagram of the fire cover seat and fire cover structure.

[0019] Figure 4 It is a schematic diagram of the fire ring structure. DETAILED DESCRIPTION

[0020] The present invention will be described in further detail below with reference to the accompanying drawings.

[0021] like Figure 1 、 Figure 2 The burner is shown in a die-cast aluminum alloy part. The ejector tube is connected to the head. The head includes a circumferential air passage 13 and at least one upward-directed air passage 2 connecting the air passage. The ejector tube is a top-down, split-type structure, consisting of an upper and lower ejector tube portion. The head is also a top-down, split-type structure, separated along the air passage 13, consisting of an upper and lower head portion. The ejector tube upper portion is integral with the head upper portion, and the ejector tube lower portion is integral with the head lower portion. The parting plane between the ejector tube and the head is the same plane, i.e., the transverse center plane of the ejector tube, facilitating subsequent parting during mold making and assembly with stainless steel screws (or direct riveting). This structure simplifies the manufacturing process and effectively reduces production costs.

[0022] The ejector tube includes a main fire ejector tube 1 and a center fire ejector tube 10. The center fire ejector tube 10 is connected to the center fire gas distribution channel 11 and the center fire cover 12 at the head. The number of the center fire gas distribution channels 11 can be one or two. The main fire ejector tube 1 is connected to the gas channel 13, and the gas channel 13 is connected to the three gas distribution channels 2 arranged circumferentially, namely the first gas distribution channel, the second gas distribution channel, and the third gas distribution channel, so that the gas mixing and distribution are more uniform. The cross-sectional area of ​​the third gas distribution channel at the end is smaller than that of the first gas distribution channel. The gas distribution channel 2 can be a circular tube or other shape.

[0023] like Figure 3 As shown, a fire cover seat 3 is positioned on the gas distribution channel 2, and a fire cover is positioned on the fire cover seat 3. The hollow portion of the fire cover forms a gas mixing chamber 4. The fire cover comprises an outer ring 5 and an inner ring 6, each riveted to the fire cover seat 3. The outer and inner rings 5 ​​and 6 form a uniform, upward-opening gas outlet 7 that connects to the gas mixing chamber. The outlet duct terminates in a full-circle annular flame hole 8 with a diameter of only 80 mm. The angle α between the axis of the annular flame hole 8 and the central axis of the fire cover ranges from 45° to 65°, with 60° being the optimal value in this example. If the angle is too small, the high-temperature flue gas flow loss after the pot is set increases, reducing thermal power and the ability to draw in secondary air. If the angle is too large, the air draw capacity increases, but the flame spreads outward, shifting the high-temperature zone outward, reducing the heated area, and decreasing efficiency.

[0024] like Figure 4As shown, the fire-dividing ring 9 consists of a bottom ring 91 and connected fire-dividing pieces 92. The bottom ring 91 is positioned within the inner ring of the fire cover base 3, which has a fire-dividing ring positioning groove 31. The fire-dividing pieces 92 adhere closely to the inner wall of the fire cover inner ring 6 within the annular fire hole 8, with a gap between them and the fire cover outer ring 5, interrupting the flame without affecting the ignition. The fire-dividing ring 9 prevents the flame from interfering with the pot legs of the pot support, significantly reducing the temperature of the smoke and pot support, reducing heat loss, and improving thermal efficiency and pot support durability. The number of fire-dividing pieces 92 is determined by the number of pot legs of the stove pot support.

[0025] The stove burner of the present invention has excellent combustion performance, can achieve a load of 5.2kW, a thermal efficiency of more than 70% (the highest thermal efficiency of ordinary types currently on the market is about 64%), and a CO concentration in dry flue gas of less than 0.03%.

Claims

1. A stove burner, wherein the ejector tube is connected to the head, characterized in that: The head includes a circumferential air passage and at least one upward air branch passage connected to the air passage, a fire cover seat is placed on the air branch passage, a fire cover is placed on the fire cover seat, and the hollow portion is a gas mixing chamber. The fire cover includes a fire cover outer ring and a fire cover inner ring. The fire cover outer ring and the fire cover inner ring form a circle of uniform upward air outlet passages connected to the gas mixing chamber, and the end of the air outlet passage is a ring-shaped fire hole. The stove burner also includes a fire dividing device for segmenting the annular flame burning in the annular fire hole. The fire dividing device is a fire dividing ring, which consists of a bottom ring and a fire dividing plate connected thereto. The bottom ring is placed on the inner ring of the fire cover seat and is clamped between the bottom of the inner ring of the fire cover and the top of the fire cover seat. The fire dividing plate is in close contact with the inner wall of the inner ring of the fire cover in the annular fire hole and has a gap between it and the outer ring of the fire cover.

2. The burner according to claim 1, characterized in that The angle between the axis of the annular fire hole and the central axis of the fire cover is 45°~65°.

3. The burner according to claim 1, characterized in that The ejector tube is a top-bottom split structure, consisting of an ejector tube upper portion and an ejector tube lower portion.

4. The burner according to claim 3, characterized in that The head is a combined structure of upper and lower parts, which is separated along the airway and consists of an upper part and a lower part of the head; the upper part of the ejector tube is integrated with the upper part of the head, and the lower part of the ejector tube is integrated with the lower part of the head, and the parting surface of the ejector tube and the head is the same plane.

5. The burner according to claim 1, characterized in that A fire ring positioning groove is provided on the inner ring of the fire cover seat.

6. The burner according to claim 5, characterized in that The fire cover outer ring and the fire cover inner ring are respectively riveted and fastened to the fire cover seat.

7. The burner according to claim 6, characterized in that There are three air distribution channels arranged in a circumferential direction, namely the first air distribution channel, the second air distribution channel, and the third air distribution channel.

8. The burner according to claim 7, characterized in that The cross-sectional area of ​​the third sub-air channel is smaller than that of the first sub-air channel.

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