Silencing combustion structure of liquid fuel and gas stove

Abstract

The utility model discloses a liquid fuel and gas stove noise reduction combustion structure which comprises a combustion cylinder and a ceramic noise reduction cylinder, the combustion cylinder is of a big-end-down conical structure, the ceramic noise reduction cylinder is of a big-end-down frustum shape, the combustion cylinder is arranged outside the ceramic noise reduction cylinder in a sleeved mode, and the ceramic noise reduction cylinder is connected with the combustion cylinder. A circle of annular heat preservation cover is arranged outside the pipe wall of the combustion cylinder, and a fire-resistant heat preservation layer is arranged between the heat preservation cover and the combustion cylinder. Compared with the prior art, an original straight cylinder type combustion cylinder structure is designed to be conical, the spiral radius of spirally rising airflow can be gradually increased, the area of a fire outlet in the top of the combustion cylinder is increased, firepower dispersion is better, and good noise reduction and noise reduction effects can be achieved in cooperation with the conical ceramic noise reduction cylinder. And the fire-resistant heat preservation layer is designed between the heat preservation cover and the combustion cylinder, and the outer wall of the combustion cylinder is wrapped by the heat preservation cover and the fire-resistant heat preservation layer, so that the effects of heat preservation and heat loss reduction are achieved, and the heat utilization rate is higher.

Description

Technical Field

[0001] This utility model relates to the field of liquid fuels and gas stoves, and in particular to a silent combustion structure for liquid fuels and gas stoves. Background Technology

[0002] In the vast commercial stove market, liquefied petroleum gas (LPG) fuel, such as gas cylinders, is widely used in schools, military units, restaurants, hotels, and other multi-person stove applications. This traditional LPG has problems such as low calorific value, high cost, low flash point, flammability, explosiveness, and significant safety hazards. Due to the significant safety risks of LPG fuel, national monitoring has become increasingly strict, prohibiting non-residential users from using LPG. This has led to a shift in commercial stove fuels towards safer fuels with higher flash points—liquid fuels (coal-based liquid fuels). Coal-based liquid fuel for kitchen stoves is a non-toxic, harmless, high-flash-point liquid kitchen stove fuel mainly composed of alkanes, made from Fischer-Tropsch synthetic hydrocarbons, industrial white oil, high-flash-point hydrocarbon compounds, and other raw materials, compounded with high-molecular-weight oxygenated compounds and additives. The main advantages of this fuel are its wide applicability, low price, high calorific value, good safety, and clean and environmentally friendly nature.

[0003] Since the combustion of liquid fuels requires the use of blowers to draw in air for combustion support, both liquid fuels and gas stoves generate significant noise during use. This makes high noise levels an unavoidable drawback when used in household and commercial stoves.

[0004] To address noise issues, our company has developed a multi-stage silent and energy-saving combustion device for liquid fuels (CN202410633760.X). This device incorporates a porous ceramic silencer inside the combustion chamber, utilizing the porous ceramic to absorb and reduce noise from the spirally rising combustion gases. Furthermore, the addition of the porous ceramic silencer alters the multi-stage combustion system of the liquid fuel, eliminating the need for a secondary combustion chamber between the lower ring of the combustion chamber and the ion-distributing flame teeth. This is because, with the ceramic silencer installed, the spirally rising combustion gases release heat at the bottom of the silencer, spontaneously forming a vortex hot air field. This effectively heats and vaporizes the subsequently arriving liquid fuel, creating a natural secondary combustion chamber. When liquid fuel enters the combustion chamber, it is ignited and vaporized in the primary combustion chamber. The flame rises spirally from the top of the combustion chamber and then enters the vortex hot air field of the secondary combustion chamber for secondary heating and complete vaporization and combustion. Finally, it enters the tertiary combustion chamber at the top of the combustion cylinder for concentrated heat release. This ensures complete combustion of the liquid fuel within the combustion cylinder and its conversion into heat energy. The heat energy is emitted from the top of the silent combustion cylinder through thermal radiation, heating the cookware. This improves the overall thermal efficiency of the combustion device and further reduces fuel consumption. Furthermore, with the improved combustion effect of the combustion cylinder, the long cylindrical combustion cylinder design of the first-generation product has been eliminated, reducing limitations on the size of the stove bowl and the height of the cooktop, making it more suitable for the installation design of small cooktops such as household stoves.

[0005] However, the following issues still need to be addressed:

[0006] 1. In open combustion, the heat jet direction of a straight-tube combustion chamber is vertically upward, resulting in poor heat distribution.

[0007] 2. During open combustion, the outer wall of the combustion cylinder will heat up due to high temperature, which can easily lead to heat loss to the outside.

[0008] 3. Because ceramic mufflers are porous ceramics, they cannot be die-cast to ensure their porosity. They can only be cast. During the casting process, porous ceramic mufflers are relatively brittle after casting, and the demolding of the two-section straight cylindrical structure of porous ceramic mufflers is also difficult, resulting in a low yield of porous ceramic mufflers. Utility Model Content

[0009] The purpose of this utility model is to provide a silent combustion structure for liquid fuel and gas stove that solves the above-mentioned problems.

[0010] To achieve the above objectives, the technical solution adopted by this utility model is: a silencing combustion structure for liquid fuel and gas stove, including a combustion cylinder and a ceramic silencing cylinder. The combustion cylinder has a conical structure with a smaller bottom and a larger top, and the ceramic silencing cylinder has a frustum-shaped structure with a smaller bottom and a larger top. The combustion cylinder is fitted outside the ceramic silencing cylinder, and an annular heat insulation cover is provided on the outside of the tube wall of the combustion cylinder. A fire-resistant heat insulation layer is provided between the heat insulation cover and the combustion cylinder.

[0011] Preferably, the ceramic silencer is a porous ceramic silencer.

[0012] Preferably, the top of the combustion tube is provided with a flame-distributing fin, and the flame-distributing fin has flame-distributing holes that disperse the flame in all directions.

[0013] Preferably, the ceramic muffler has a vertically opening at the center, and the opening is a cone shape that is smaller at the bottom and larger at the top. A conical guide flare is machined between the top surface of the ceramic muffler and the opening.

[0014] Preferably, the refractory insulation layer is formed by casting refractory clay.

[0015] Preferably, the device also includes a mounting flange plate, which is fixed to the insulation cover. The mounting flange plate has multiple bolt mounting holes, and the mounting flange plate is fixed to the stove to be installed through the bolt mounting holes.

[0016] Preferably, the heat insulation cover is provided with flanges at both the upper and lower ends. The flange at the upper end of the heat insulation cover is fixedly connected to the mounting flange plate by fastening bolts, and the flange at the lower end of the heat insulation cover is fixedly connected to the gas stove body.

[0017] Compared with the prior art, the advantages of this utility model are:

[0018] (1) This utility model redesigns the original straight-cylinder combustion cylinder structure into a conical shape, which allows the spiraling airflow to gradually increase its swirling radius, increasing the area of ​​the flame outlet at the top of the combustion cylinder, thus dispersing the heat better and facilitating the bottom heating of the cookware. Combined with the conical ceramic silencer inside the combustion cylinder, the time for the airflow to pass through the ceramic silencer is further increased, reducing the airflow speed and achieving a good noise reduction effect. At the same time, the conical ceramic silencer design makes demolding after casting very convenient, greatly improving the yield of ceramic silencers.

[0019] (2) The present invention adds a ring-shaped heat insulation cover to the outside of the combustion tube wall and designs a fire-resistant heat insulation layer between the heat insulation cover and the combustion tube. The outer wall of the combustion tube is wrapped by the heat insulation cover and the fire-resistant heat insulation layer to achieve the effect of heat preservation and reduce heat loss, so as to make its heat utilization rate higher. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the internal structure of the silencing combustion structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the external structure of the silencing combustion structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the bottom structure of the silencing combustion structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the assembly structure of the silencing combustion structure of this utility model on the stove body.

[0024] In the diagram: 1. Combustion cylinder; 2. Ceramic silencer; 21. Vent; 22. Guide flare; 3. Insulation cover; 4. Refractory insulation layer; 5. Flame spreader; 6. Mounting flange; 7. Combustion body; 8. Gas stove. Detailed Implementation

[0025] The present invention will be further described below: A silencer combustion structure for liquid fuel and a gas stove, see [link to relevant documentation]. Figures 1 to 3 The invention comprises a combustion chamber 1 and a ceramic silencer 2. The combustion chamber 1 has a conical structure, smaller at the bottom and larger at the top, while the ceramic silencer 2 has a frustum-shaped structure, smaller at the bottom and larger at the top. The combustion chamber 1 is fitted onto the ceramic silencer 2. This invention redesigns the original straight-cylinder combustion chamber 1 into a conical shape, which allows the spiraling airflow to gradually increase its vortex radius, increasing the area of ​​the flame outlet at the top of the combustion chamber 1, resulting in better heat dispersion and improved bottom heating of the cookware. Combined with the conical ceramic silencer 2 inside the combustion chamber 1, this further increases the time the airflow spends passing through the ceramic silencer 2, reducing the airflow velocity and achieving excellent noise reduction. Simultaneously, the conical design of the ceramic silencer 2 facilitates demolding after casting, greatly improving the yield of the ceramic silencer 2.

[0026] Since the liquid fuel of this application is completely burned inside the combustion cylinder 1, the temperature inside the combustion cylinder 1 is also very high. In order to prevent heat energy from being lost from the cylinder wall of the combustion cylinder 1, this utility model adds a ring-shaped heat insulation cover 3 to the outside of the cylinder wall of the combustion cylinder 1, and designs a fire-resistant heat insulation layer 4 between the heat insulation cover 3 and the combustion cylinder 1. By wrapping the outer wall of the combustion cylinder 1 with the heat insulation cover 3 and the fire-resistant heat insulation layer 4, the heat insulation effect is achieved, reducing heat loss and making its heat utilization rate higher.

[0027] The ceramic muffler 2 is a porous ceramic muffler 2. The porous ceramic muffler 2 is made of porous mullite ceramic. Porous mullite ceramic has the characteristics of high porosity, low density, heat resistance and high temperature resistance, and high mechanical strength. Its porous and breathable structure has a very good sound absorption and noise reduction effect.

[0028] To achieve uniform heat output from the top of the combustion cylinder 1, a flame-distributing fin 5 is provided at the top of the combustion cylinder 1. The flame-distributing fin 5 has flame-distributing holes that disperse the flame in all directions, so that the heat generated by the combustion of liquid fuel is uniformly output from the flame-distributing holes at the top of the combustion cylinder 1, thereby achieving uniform heating of the bottom of the pot.

[0029] However, since the ceramic muffler 2 has a certain thickness, the taper of the ceramic muffler 2 and the vent 21 should not be too large. If the taper is too large, the space at the bottom of the ceramic muffler 2 will be too large, and the liquid fuel cannot be concentrated for effective combustion, which is not conducive to the formation of the vortex hot air field. If the taper is too small, the heat coming out from the top of the ceramic muffler 2 will be too concentrated and cannot be completely dispersed to the flame distribution fins 5 and the surrounding area. In order to improve the flame distribution effect of the flame distribution fins 5, the present invention provides a vertical vent 21 at the center of the ceramic muffler 2. The vent 21 is a conical opening with a smaller bottom and a larger top. A conical guide flare 22 is processed between the top surface of the ceramic muffler 2 and the vent 21. The guide flare 22 can further increase the heat outlet area so that it can be dispersed to the surrounding area of ​​the flame distribution fins 5, so that the flame distribution fins 5 can evenly distribute the flame and achieve uniform heating of the cookware. As a preferred embodiment, the taper of the vent 21 and the outer wall of the porous ceramic muffler 2 is 15-85°, the taper of the guide flare 22 is 100-175°, and the height of the ceramic muffler is 50-100mm, which achieves the best effect.

[0030] The refractory insulation layer 4 is formed by casting refractory clay. It is cylindrical in shape and is fitted outside the combustion cylinder 1 to achieve heat insulation for the inside of the combustion cylinder 1.

[0031] In addition, to facilitate the installation of the entire gas stove 8, a mounting flange plate 6 is included. The mounting flange plate 6 is fixed to the insulation cover 3, and has multiple bolt holes. The mounting flange plate 6 is fixed to the stovetop to be installed via these bolt holes. The insulation cover 3 serves as a connecting component for the gas stove 8. The entire gas stove 8 is fixed to the stovetop via the mounting flange plate 6. For the installation and assembly of this utility model on the gas stove 8, please refer to [reference needed]. Figure 4 .

[0032] Since the heat insulation cover 3 is used as the connecting component, flanges are provided at both the upper and lower ends of the heat insulation cover 3. The flange at the upper end of the heat insulation cover 3 is fixedly connected to the mounting flange plate 6 by fastening bolts, and the flange at the lower end of the heat insulation cover 3 is fixedly connected to the main body of the gas stove 8. When installing, the combustion cylinder 1 only needs to be welded to the combustion body 7 of the gas stove 8. The gas stove 8 can be installed and used on the stovetop through the heat insulation cover 3 and the mounting flange plate 6.

[0033] The above provides a detailed description of the silencing combustion structure for a liquid fuel and gas stove provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, based on the idea of ​​this utility model, there will be changes in the specific implementation and application scope. Changes and improvements to this utility model are possible without exceeding the concept and scope specified in the appended claims. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A silencer combustion structure for liquid fuel and a gas stove, characterized in that: It includes a combustion cylinder and a ceramic silencer. The combustion cylinder has a conical structure with a smaller bottom and a larger top, and the ceramic silencer has a frustum-shaped structure with a smaller bottom and a larger top. The combustion cylinder is fitted outside the ceramic silencer. The outer wall of the combustion cylinder is provided with an annular heat insulation cover, and a fire-resistant heat insulation layer is provided between the heat insulation cover and the combustion cylinder.

2. The silencing combustion structure for a liquid fuel and gas stove according to claim 1, characterized in that: The ceramic silencer is a porous ceramic silencer.

3. The silencing combustion structure for a liquid fuel and gas stove according to claim 1, characterized in that: The top of the combustion tube is provided with a flame-distributing fin, and the flame-distributing fin has flame-distributing holes that disperse the flame in all directions.

4. The silencing combustion structure for a liquid fuel and gas stove according to claim 3, characterized in that: A vent is vertically opened at the center of the ceramic muffler, and the vent is a cone-shaped opening that is smaller at the bottom and larger at the top. A cone-shaped guide flare is machined between the top surface of the ceramic muffler and the vent.

5. The silencing combustion structure for a liquid fuel and gas stove according to claim 1, characterized in that: The refractory insulation layer is formed by casting refractory clay.

6. The silencing combustion structure for a liquid fuel and gas stove according to claim 1, characterized in that: It also includes a mounting flange plate, which is fixed to the heat insulation cover. The mounting flange plate has multiple bolt mounting holes, and the mounting flange plate is fixed to the stove to be installed through the bolt mounting holes.

7. The silencing combustion structure for a liquid fuel and gas stove according to claim 6, characterized in that: The heat insulation cover is provided with flanges at both the top and bottom. The flange at the top of the heat insulation cover is fixedly connected to the mounting flange plate by fastening bolts, and the flange at the bottom of the heat insulation cover is fixedly connected to the gas stove body.

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