WO2022242574A1

WO2022242574A1 - Efficient energy-saving gas stove for cooking

Info

Publication number: WO2022242574A1
Application number: PCT/CN2022/092819
Authority: WO
Inventors: 刘效洲; 刘杰成; 付泽斌
Original assignee: 广东工业大学
Priority date: 2021-05-17
Filing date: 2022-05-13
Publication date: 2022-11-24
Also published as: CN113339848A

Abstract

Disclosed is an efficient energy-saving gas stove for cooking, comprising a stove body, wherein the stove body is provided with a cooking bench, a combustion cavity and an air inlet cavity; a burner is mounted in the combustion cavity; the cooking bench is provided at an upper end of the combustion cavity; the air inlet cavity is provided on the periphery of the combustion cavity; a first air port in communication with the air inlet cavity is provided at a bottom end of the combustion cavity; the air inlet cavity is internally provided with a gas pipe and a gas nozzle; and an air inlet of the air inlet cavity is provided at an annular edge of the cooking bench. The gas stove of the present design has a scientific and compact structure, and is economical and practical. The cooking bench is sealed by means of a first heat absorption plate, such that high-temperature smoke discharged into the atmosphere is subjected to heat absorption and utilization, so as to avoid energy waste; furthermore, the heat is recycled to heat air in the air inlet cavity, thereby greatly improving the efficiency of the gas stove, and achieving the aims of high efficiency and energy conservation.

Description

A high-efficiency and energy-saving special gas stove for cooking

technical field

The invention relates to the field of stove structure, in particular to a high-efficiency and energy-saving gas stove dedicated to cooking.

Background technique

At present, most of the cooking industry adopts atmospheric burners. There is a huge gap formed by the bracket between the bottom of the pot and the burner, through which the secondary air is supplemented to support combustion. Due to the late mixing of the secondary air and the flame and the difficulty in precisely controlling the flow rate, the flame often appears red flame or yellow flame phenomenon, the combustion efficiency is low, and the carbon monoxide emission increases. In addition, because there is no sealing device at the bracket, a large amount of high-temperature flue gas is directly discharged into the atmosphere, resulting in a large amount of energy waste.

Contents of the invention

In order to solve the above problems, the present invention provides a high-efficiency gas stove with a sealing and waste heat recovery device and a premixed combustion method (with a secondary air inlet).

The technical solution adopted by the present invention to solve the technical problem is: a high-efficiency and energy-saving special gas stove for cooking, including a stove body. The stove body is formed with a stove top, a combustion chamber and an air inlet chamber. mouth, the cooktop is set on the upper end of the combustion chamber, the air inlet chamber is arranged on the outer periphery of the combustion chamber, and the bottom end of the combustion chamber is provided with a first air port communicating with the air inlet chamber, so A gas pipe and a gas nozzle are installed in the air inlet chamber, and the air inlet of the air inlet chamber is arranged on the annular edge of the stove. The air inlet chamber is arranged on the outer periphery of the combustion chamber, which can effectively absorb the heat generated by the combustion chamber to heat the combustion-supporting air. The combustion-supporting hot air is mixed with gas and enters the burner, and then sprayed out of the burner to form a flame to heat the bottom of the pot, so as to improve the combustion efficiency.

Further, a first heat-absorbing plate is installed on the cooktop, and the high-temperature flue gas from the cooktop is discharged into the atmosphere after passing through the first heat-absorbing plate, so the first heat-absorbing plate can absorb the heat of the high-temperature flue gas, on the one hand, it can The heat of the first heat-absorbing plate is exchanged to the pot/furnace of the cooktop in the form of radiation transfer. On the other hand, the first heat-absorbing plate acts as a heat storage, which makes the temperature around the cooktop rise. The air inlet is arranged at the annular edge of the cooktop, so that the temperature of the combustion-supporting air in the air inlet cavity can be rapidly increased through heat transfer, so as to achieve the purpose of improving combustion efficiency. Similarly, a second heat-absorbing plate is installed in the air-inlet cavity, and the second heat-absorbing plate plays the role of heat absorption and heat storage, so that the temperature of the combustion-supporting air in the air-inlet cavity is further increased, and the purpose of improving combustion efficiency is achieved. .

Further, the first heat-absorbing plate and/or the second heat-absorbing plate adopt porous ceramic plates, and the porous ceramic material is made of high-quality raw materials such as corundum sand, silicon carbide, cordierite, etc., after molding and special high-temperature sintering process A kind of porous ceramic material prepared with opening aperture and high opening porosity, with high temperature resistance, high pressure resistance, acid, alkali and organic medium corrosion resistance, good biological inertia, controllable pore structure and high opening Porosity, long service life, good product regeneration performance and other advantages. Preferably, the first heat-absorbing plate and/or the second heat-absorbing plate adopts porous alumina ceramic plate or porous aluminum nitride ceramic plate, and the thermal conductivity of alumina ceramic plate and aluminum nitride ceramic plate is good, which is beneficial to improve combustion efficiency.

Further, a mixing device is installed in the combustion chamber, and the mixing device adopts turbine blades, and the mixing device is arranged at the first tuyere, and is sucked into the air intake chamber by the suction force generated by the high-speed jetting of gas. The air and gas are evenly mixed by the mixing device and then sent to the burner for combustion, which improves the combustion efficiency.

Further, the side wall of the combustion chamber is provided with a second air port communicating with the air inlet chamber, and the second air port is arranged on the second heat absorbing plate, since the air passing through the second heat absorbing plate will When the temperature rises, the upper and lower parts of the air inlet chamber will form an area with different temperatures at the second heat absorbing plate. The second tuyere is installed to directly make up the second air to the combustion chamber. After the burner flame is initially formed, it will be combined with the second The air entering the secondary air port is fully mixed and burned to achieve pre-mixed combustion, which completely solves the problem of secondary air mixing delay and improves combustion efficiency.

Further, a damper for adjusting the size of the tuyere is installed at the second tuyere, and the damper can be a rotating louver structure, or a push-pull gate structure, etc., and the air intake volume can be controlled by adjusting the size of the tuyere.

Further, the gas pipe includes a gas inlet pipe, a gas uniform pipe and several gas outlet pipes that communicate with each other. The gas uniform pipe is circular and placed below the bottom end of the combustion chamber. The air distribution pipe is installed on the gas uniform pipe, and the ends of all the gas outlet pipes are aligned with the lower extension line of the axis of the mixing device, and the gas nozzle is installed at the end of each of the gas outlet pipes. The gas pipe of this design can ensure sufficient suction force to inhale air, and make the gas mix with air evenly and be input into the combustion chamber. Wherein, the number of the outlet pipes is preferably 6 or 8.

Further, the bottom of the combustion chamber is provided with a first shroud, the first shroud is in the shape of a horn that tapers from bottom to top, and the lower end of the first shroud covers all the gas nozzles, This design can better guide the gas and high-temperature air in the air inlet chamber. As a further idea of this solution, in order to make the drainage effect of gas and high-temperature air better, the first tuyeres are also provided with a second shroud, and the second shroud is in the shape of a horn that tapers from bottom to top .

The beneficial effects of the present invention are: the gas cooker of this design has a scientific and compact structure, is economical and practical, and the first heat-absorbing plate seals the cooktop to absorb heat and utilize the high-temperature flue gas discharged into the atmosphere, avoiding energy waste, and simultaneously Heat recovery is used to heat the air in the air inlet chamber. By setting the second heat absorbing plate and the second air inlet in the air inlet chamber, the pre-mixed combustion mode of the flame can be realized while preheating the combustion air, which greatly improves the efficiency of the gas stove. , to achieve the purpose of high efficiency and energy saving.

Description of drawings

Fig. 1 is a schematic cutaway view of the overall structure of the present invention;

Fig. 2 is a working principle block diagram of the present invention;

Fig. 3 is a schematic structural diagram of the gas pipe of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings. Wherein, the arrows in FIG. 2 indicate the air flow direction.

A high-efficiency and energy-saving special gas stove for cooking, as shown in Figure 1, includes a stove body, the stove body includes an outer wall 11 and an inner wall 12, the inner wall 12 is surrounded to form a combustion chamber, and a burner 100 is installed in the combustion chamber And the mixing device 110, the mixing device 110 adopts the turbine blades that can rotate automatically, the air and gas sucked into the air chamber by the mixing device 110 are uniformly mixed, and then fully burned at the burner. An air inlet chamber is formed between the outer wall 11 and the inner wall 12, and the air inlet chamber is arranged on the periphery of the combustion chamber, which is helpful for the heat absorption and temperature rise of the combustion-supporting air; The plate 22 , the cooktop bottom plate 23 , the cooktop side plate 22 and the cooktop bottom plate 23 enclose a cooktop, on which the first heat absorbing plate 20 is installed. The air inlet of the air inlet chamber is arranged at the annular edge of the stove, the second heat absorbing plate 30 is installed in the air inlet chamber, and the inner wall 12 of the combustion chamber is provided with a second heat absorbing plate communicating with the air inlet chamber. Two air outlets 102 , the second air outlets 102 are arranged on the second heat absorbing plate 30 . The bottom of the combustion chamber is provided with a bottom plate 13, and the bottom plate 13 is provided with a first tuyere 101 connected to the air inlet chamber. The bottom of the combustion chamber is supported by a bracket 14, and a gas pipe 4 is installed in the air inlet chamber and arranged on the gas pipe. The gas nozzle of 4 heads, gas pipe 4 are located at the bottom of base plate 13. The high-speed gas ejected from the gas nozzle can suck the air in the air chamber, and after being uniformly mixed by the mixing device 110, it enters the burner for full combustion.

Further, the outer wall 11 is made of carbon steel plate, which is economical and has good appearance and rigidity. The inner wall 12 and the bottom plate 13 are made of cast iron, which are durable and easy to produce. The cooktop side plate 22 and the cooktop bottom plate 23 are made of stainless steel, which not only has a beautiful appearance, but also is not easy to rust and is easy to clean.

Further, a damper for adjusting the size of the tuyere can be installed at the second tuyere 102, and the damper can be a rotating louver structure, or a push-pull gate structure, and the air intake can be controlled by adjusting the size of the tuyere.

Further, the first heat-absorbing plate 20 and/or the second heat-absorbing plate 30 adopts porous ceramic plates, and the porous ceramic material is made of high-quality raw materials such as corundum sand, silicon carbide, cordierite, etc. A kind of porous ceramic material with open pore size and high open porosity prepared by sintering process. It has high temperature resistance, high pressure resistance, acid, alkali and organic medium corrosion resistance, good biological inertia, controllable pore structure and high Excellent open porosity, long service life, good product regeneration performance and other advantages. Preferably, the first heat absorbing plate 20 and/or the second heat absorbing plate 30 adopts a porous alumina ceramic plate or a porous aluminum nitride ceramic plate, and the thermal conductivity of the alumina ceramic plate and the aluminum nitride ceramic plate is good, which is beneficial to Improve combustion efficiency.

Further, the bottom of the combustion chamber is provided with a first guide cover 103, and the first air outlet 101 is also provided with a second guide cover 104, and the first guide cover 103 and the second guide cover 104 They are all in the shape of a horn that tapers from bottom to top, and the lower end of the first shroud 103 covers all the gas nozzles, so that the design can better guide the gas and high-temperature air in the air inlet chamber into the combustion chamber .

Further, the mixing device 110 is preferably arranged at the outlet of the second shroud 104, so that the air and gas have a longer distance before reaching the burner to enhance mixing and improve combustion efficiency.

As shown in Figure 2, the working principle of this design: the cooking pot 5 is placed on the stove support 21, and the first heat absorbing plate 20 is arranged on the stove top, and one end of the first heat absorbing plate 20 is connected to the cooking pot 5, and the other end The side plate 22 of the stove is connected so that the stove forms a sealed structure. The high-temperature flue gas generated by combustion passes through the first heat absorbing plate 20 and then is discharged into the atmosphere. Therefore, the first heat absorbing plate 20 absorbs the heat of the high-temperature flue gas and becomes red, and the temperature can reach about 600 degrees. The combustion-supporting cold air is sucked through the annular gap between the side plate 22 of the stove and the outer wall 11 (that is, the air inlet of the air inlet cavity) by the suction generated by the ejection effect of the gas nozzle, and first passes through the side plate 22 of the stove and the high-temperature flue gas. The exchanged heat becomes medium-temperature air at about 100°C; part of the medium-temperature air enters the combustion chamber through the second tuyere 102 for combustion-supporting purposes. Another part of the medium-temperature air passes through the second heat absorbing plate 30 through the suction force generated by the ejection of the gas nozzle. The first heat absorbing plate 20 at about 600 degrees transfers heat to the stove bottom plate 23 through radiation, and the temperature of the stove bottom plate 23 can be adjusted. rise to 450 degrees; then the cooktop bottom plate 23 heats the second heat absorbing plate 30 to about 300 degrees by radiation. After the medium-temperature air passes through the second heat-absorbing plate 30, the temperature can rise to more than 200 degrees and become high-temperature air. The gas enters several circularly arranged gas nozzles through the gas pipe 4 and sprays out at a high speed, ejecting high-temperature air above 200 degrees to form a mixture of natural gas (or other gas, such as coal gas, petroleum gas, etc.) and high-temperature air, and then After being further uniformly mixed by the mixing device 110, it enters the burner, and then sprays out to form a flame to heat the bottom of the pot. After the initial flame is formed, it will fully mix and burn with the medium-temperature air entering through the second tuyeres 102, completely solving the problem of secondary air mixing delay. Since the gas and air are pre-mixed and fully combusted in the combustion chamber, it can be ensured that the combustion is basically in the pre-mixed combustion mode, which greatly improves the thermal efficiency of the gas stove.

As shown in Figure 3, the gas pipe 4 includes a gas inlet pipe 41, a gas uniform pipe 42 and a number of gas outlet pipes 43 which communicate with each other. The gas uniform pipe 42 is circular and placed below the bottom of the combustion chamber. All the air outlet pipes 43 are installed on the uniform air pipe 42 in a circumferentially uniform manner, and the ends of all the air outlet pipes 43 are aligned with the lower extension line of the axis of the mixing device 110, each of the air outlet pipes 43 The gas nozzles are installed at the ends. The gas pipe of this design can ensure that the gas is ejected at a high speed and the air is injected into the combustion chamber by the residual pressure. Wherein, the number of the outlet pipes 43 is preferably 6 or 8. As the optimal choice of this solution, in order to better guide the gas to the combustion chamber, the end of each gas outlet pipe 43 is in an upwardly tilted arc shape, so that the gas nozzle can be better aligned with the first tuyere 101 , or the end of each of the outlet pipes 43 directly extends into the second shroud 104 .

The above are only preferred embodiments of the present invention, and should not limit the scope of the present invention with this, that is, all simple equivalent changes and modifications made according to the patent scope of the present invention and the description of the invention are still the same. It belongs to the scope covered by the patent of the present invention.

Claims

A high-efficiency and energy-saving special gas stove for cooking, characterized in that it includes a stove body, the stove body is formed with a stove, a combustion chamber and an air inlet chamber, a burner is installed in the combustion chamber, and the stove is set on The upper end of the combustion chamber, the air inlet chamber is arranged on the outer periphery of the combustion chamber, the bottom end of the combustion chamber is provided with a first air port communicating with the air inlet chamber, and the gas inlet chamber is installed in the air inlet chamber. pipe and gas nozzle, and the air inlet of the air inlet cavity is arranged on the annular edge of the stove.
The high-efficiency and energy-saving special gas stove for cooking according to claim 1, wherein a first heat absorbing plate is installed on the stove top.
The high-efficiency and energy-saving special gas stove for cooking according to claim 2, wherein a second heat absorbing plate is installed in the air inlet cavity.
The high-efficiency and energy-saving gas stove dedicated for cooking according to claim 3, wherein the first heat absorbing plate and/or the second heat absorbing plate are made of porous ceramic plates.
The high-efficiency and energy-saving special gas stove for cooking according to claim 1, wherein a mixing device is installed in the combustion chamber, and the mixing device adopts turbine blades.
The high-efficiency and energy-saving gas stove dedicated for cooking according to claim 5, wherein the mixing is arranged at the first tuyere.
A high-efficiency and energy-saving gas stove for cooking according to claim 3, wherein the side wall of the combustion chamber is provided with a second air port communicating with the air inlet chamber, and the second air port is located on the above the second heat absorbing plate.
The high-efficiency and energy-saving special gas stove for cooking according to claim 7, wherein a damper for adjusting the size of the tuyere is installed at the second tuyere.
A high-efficiency and energy-saving gas stove for cooking according to claim 1, wherein the gas pipe includes an interconnected gas inlet pipe, a gas uniform pipe, and a plurality of gas outlet pipes, and the gas uniform pipe is in the shape of a ring and juxtaposed Below the bottom end of the combustion chamber, all the outlet pipes are installed on the uniform pipe in a circumferentially uniform manner, and the ends of all the outlet pipes are aligned with the lower extension line of the axis of the mixing device. The gas nozzles are installed at the ends of one of the gas outlet pipes.
The high-efficiency and energy-saving gas stove dedicated for cooking according to claim 9, wherein the number of the gas outlet pipes is 6 or 8.