Ceramic silencing barrel for liquid fuel and gas stove

Abstract

The utility model discloses a ceramic silencing cylinder for liquid fuel and a gas stove, which comprises a ceramic silencing cylinder, the ceramic silencing cylinder is a porous ceramic silencing cylinder, the whole ceramic silencing cylinder is in a cone frustum shape with a small lower part and a large upper part, the center of the ceramic silencing cylinder is vertically provided with a vent hole, and the vent hole is communicated with the ceramic silencing cylinder. The ventilation opening is in a conical opening shape with the small lower portion and the large upper portion, and a conical guide flaring is machined between the top face of the ceramic silencing barrel and the ventilation opening. Compared with the prior art, due to the structural design of the conical ceramic silencing barrel, the time for airflow to penetrate through the ceramic silencing barrel can be further prolonged, the air speed and noise of the airflow are further reduced along with the increase of the caliber of the ceramic silencing barrel, liquid fuel can be fully burnt in the ceramic silencing barrel, and due to the conical design, the effect is good. According to the casting mold, heat at the top of the ceramic silencing cylinder can be better dispersed, demolding is also very convenient after casting is completed, and the yield of the ceramic silencing cylinder is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of liquid gas stoves, and in particular to a ceramic silencer for liquid fuel 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 a fan to blow in air for combustion support, liquid fuel gas stoves will generate a lot of noise during use. Therefore, the high noise level is an unavoidable defect 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 of hot air. This effectively heats and vaporizes the subsequently arriving liquid fuel, creating a natural secondary combustion chamber. When liquid fuel enters the burner, it is ignited and vaporized in the primary combustion chamber. The flame rises spirally from the top of the burner 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 thermal efficiency of the entire combustion device and further reduces fuel consumption. Furthermore, with the improved combustion effect of the combustion cylinder, the original long cylindrical combustion cylinder design 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 stoves such as household stoves.

[0005] However, the following problems still need to be solved. Because the ceramic muffler is a porous ceramic, it cannot be die-cast to ensure its porosity; it can only be formed by casting. During casting, the porous ceramic muffler is relatively brittle after molding. Although a two-section design is adopted, the overall structure is still a straight cylinder. In open combustion, the straight cylinder structure results in poor heat distribution. Furthermore, the two-section straight cylinder structure of the porous ceramic muffler is difficult to demold, leading to a low yield rate. Therefore, it is urgent to optimize the design of this porous ceramic muffler. Utility Model Content

[0006] The purpose of this invention is to provide a ceramic silencer for liquid fuel gas stoves that solves the noise problem of existing liquid fuel gas stoves, facilitates heat dissipation at the outlet, and is easy to manufacture.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is: a ceramic muffler for liquid fuel and gas stoves, comprising a ceramic muffler, wherein the ceramic muffler is a porous ceramic muffler, the ceramic muffler is generally shaped like a frustum of a cone with a smaller bottom and a larger top, a vent is vertically opened at the center of the ceramic muffler, the vent is shaped like a cone with a smaller bottom and a larger top, and a conical guide flare is machined between the top surface of the ceramic muffler and the vent.

[0008] Preferably, the ceramic silencer has multiple vertically machined air guide grooves inside its cylinder wall. These air guide grooves are evenly spaced along the circumference of the ceramic silencer and extend from the upper end of the ceramic silencer to the air vent in the lower part of the ceramic silencer.

[0009] Preferably, the inner wall of the ceramic silencer has multiple vertically machined air guide grooves, which are evenly spaced along the circumference of the ceramic silencer.

[0010] Preferably, the ceramic silencer has multiple vertically machined air guide grooves inside, which are evenly spaced along the circumference of the ceramic silencer and run through the entire ceramic silencer from top to bottom.

[0011] Preferably, the air guide groove is formed inside the wall of the ceramic silencer or located on the inner wall of the ceramic silencer.

[0012] Preferably, the inner wall of the ceramic silencer is provided with a spiral air guide groove.

[0013] Preferably, the porous ceramic silencer is integrally cast from porous ceramic material.

[0014] Preferably, the taper of the vent and the porous ceramic silencer is 15-85°.

[0015] Preferably, the taper of the guide flare is 100-175°.

[0016] Preferably, the height of the ceramic silencer is 50-100mm.

[0017] Preferably, the porous ceramic silencer is installed inside the conical combustion chamber of the gas stove.

[0018] Compared with the prior art, the advantages of this utility model are:

[0019] (1) The conical ceramic silencer structure of this utility model can further increase the time for airflow to pass through the ceramic silencer. As the diameter of the ceramic silencer increases, the airflow speed and noise are further reduced, and the liquid fuel can be fully burned inside the ceramic silencer. Moreover, the conical design allows for better heat distribution at the top of the ceramic silencer, which is more conducive to heating the bottom of the cookware. At the same time, the conical design makes demolding very convenient after casting, which greatly improves the yield of ceramic silencers.

[0020] (2) The present invention has a conical guide flare between the top surface of the ceramic silencer and the vent, which can further increase the heat outlet and allow it to be dispersed to the periphery of the fire distribution fins. The fire is evenly distributed through the fire distribution fins to achieve uniform heating of the cookware.

[0021] (3) In order to improve the ventilation effect of the ceramic muffler, the present invention has a guide groove processed inside the ceramic muffler. By opening the guide groove, the overall ventilation effect of the ceramic muffler can be further improved. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0024] Figure 3 This is a schematic diagram of the assembly structure of this utility model inside the combustion chamber;

[0025] Figure 4 A schematic diagram of a ceramic silencer cylinder with an air guide channel cut into the cylinder wall;

[0026] Figure 5 A schematic diagram of the ceramic silencer structure on the inner wall of the air guide duct;

[0027] Figure 6 This is a schematic diagram of a ceramic silencer structure with a spiral-shaped air guide channel.

[0028] In the diagram: 1. Ceramic silencer; 2. Vent; 3. Guide flare; 4. Air guide groove; 5. Combustion tube; 6. Flame spreader. Detailed Implementation

[0029] The present invention will be further described below, specifically as follows:

[0030] A ceramic muffler for liquid fuels and gas stoves, see [link / reference]. Figure 1 and Figure 2The invention includes a ceramic muffler 1, which is a porous ceramic muffler made of porous mullite ceramic. Porous mullite ceramic has the characteristics of high porosity, low density, high temperature and high firing resistance, and high mechanical strength. Its porous and breathable structure has a good sound absorption and noise reduction effect. The ceramic muffler 1 is generally shaped like a frustum of a cone, smaller at the bottom and larger at the top. A vent 2 is vertically opened at the center of the ceramic muffler 1, and the vent 2 is also shaped like a cone, smaller at the bottom and larger at the top. This invention abandons the original straight cylinder structure and improves the shape and central vent of the ceramic muffler 1. All components are designed in a conical shape. Since the combustion element of our combustion device produces spiral gas, when the vaporized liquid fuel spirals upwards within the ceramic silencer 1 with the airflow, the gradually expanding structure of the ceramic silencer 1 further increases the time the airflow spends passing through it. Furthermore, as the diameter of the ceramic silencer 1 increases, the airflow speed and noise are further reduced, allowing the liquid fuel to burn completely within the combustion chamber 5 and the ceramic silencer 1. The conical design also allows for better heat distribution at the top of the ceramic silencer 1, which is more conducive to heating the bottom of the cookware. Simultaneously, because both the outer and inner vents 2 of the ceramic silencer 1 are conical, demolding is very convenient after casting, greatly improving the yield of the ceramic silencer 1.

[0031] To match the shape design of the ceramic muffler 1, the combustion chamber 5 also features a similar conical design. The ceramic muffler 1 can be directly placed inside the combustion chamber 5 for installation. Finally, the heat generated by the combustion of liquid fuel is evenly distributed through the flame-distributing fins 6 installed at the top of the combustion chamber 5. However, since the ceramic muffler 1 has a certain thickness, the taper of the ceramic muffler 1 and the vent 2 should not be too large. If the taper is too large, the space at the bottom of the ceramic muffler 1 will be too large, preventing the liquid fuel from concentrating for effective combustion and hindering the formation of a vortex hot air field. If the taper is too small, the heat exiting from the top of the ceramic muffler 1 will be too concentrated and cannot be completely distributed to the flame-distributing fins 6 and the surrounding area. To improve the flame-distributing effect of the flame-distributing fins 6, this invention incorporates a conical guide flare 3 between the top surface of the ceramic muffler 1 and the vent 2. This further increases the heat outlet, allowing the heat to be distributed to the surrounding area of ​​the flame-distributing fins 6, enabling the flame-distributing fins 6 to evenly distribute the heat and achieve uniform heating of the cookware.

[0032] To improve the ventilation and air permeability of the ceramic muffler 1, this utility model incorporates an air guide groove 4 inside the ceramic muffler 1. By opening the air guide groove 4, the overall ventilation and heat conduction effect of the ceramic muffler 1 can be further improved.

[0033] Therefore, our company has designed several ceramic silencer structures.

[0034] Style 1: See its structure. Figure 4The ceramic muffler 1 has multiple vertically machined air guide grooves 4 inside its cylinder wall. These air guide grooves 4 are evenly spaced along the circumference of the ceramic muffler 1. The air guide grooves 4 extend from the upper end of the ceramic muffler 1 to the vent 2 in the lower part of the ceramic muffler 1. Since the lower part of the ceramic muffler 1 is mainly used for heat-gathering combustion, the demand for air guidance is not high. The lower end of the air guide groove 4 is located at the vent 2 in the lower part of the ceramic muffler 1, which is more conducive to the heat energy after heat gathering combustion passing through the air guide groove 4 to heat the outside.

[0035] Style 2: See its structure. Figure 5 The inner wall of the ceramic silencer 1 has multiple vertically machined air guide grooves 4, which are evenly spaced along the circumference of the ceramic silencer 1.

[0036] Style 3: See its structure. Figure 6 Furthermore, the air guide slot 4 can also be designed in a spiral shape and formed on the inner wall of the ceramic muffler 1. Although our company has only developed three product types of ceramic mufflers 1 at present, more designs can be extended based on this concept, all of which are within the scope of protection of this application.

[0037] Because the porous ceramic muffler adopts a conical design instead of the original two-section design, it is made of porous ceramic material and cast as a whole, which is very convenient to manufacture. Because it is conical, demolding is also easy.

[0038] Since the overall taper of the porous ceramic silencer should not be too large, otherwise it will affect the flame concentration and combustion effect, the taper of the vent 2 and the outer wall of the porous ceramic silencer is 15-85°. To improve the flame dispersion effect of the top vent of the porous ceramic silencer, the taper of the guide flare 3 is 100-175°, and the height of the ceramic silencer is 50-100mm, at which point the effect is optimal.

[0039] When this utility model is assembled and used on the combustion tube 5 developed by our company, see [reference needed]. Figure 3 Because the combustion chamber uses a spiral air intake method, the liquid fuel is vaporized and burned with the help of cyclones. Therefore, the flame ejected from the combustion chamber is also cyclone-shaped. After entering the ceramic muffler 1 in a cyclone shape, it rotates in the lower part of the combustion chamber 5 to achieve better noise reduction. At the same time, it allows the fuel that is not fully burned in the flame to be fully burned, and the heat energy generated passes through the ceramic muffler 1 and is released from its upper part.

[0040] The above provides a detailed description of a ceramic silencer for liquid fuel and gas stoves 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 ceramic sound attenuation cylinder for use in liquid fuel and gas cookers, characterized by: The application relates to a ceramic sound-absorbing cylinder, which is a porous ceramic sound-absorbing cylinder, has a whole lower-small and upper-large conical frustum shape, is vertically provided with a ventilation opening in the center, the ventilation opening has a lower-small and upper-large conical opening shape, and a conical guide flared portion is arranged between the top surface of the ceramic sound-absorbing cylinder and the ventilation opening.

2. A ceramic sound suppression cylinder for liquid fuel and gas burners as claimed in claim 1, wherein: A plurality of air guide grooves are vertically arranged on the inner simple wall of the ceramic sound-absorbing cylinder, the air guide grooves are uniformly and spacedly distributed along the circumferential direction of the ceramic sound-absorbing cylinder, and the air guide grooves penetrate from the upper end of the ceramic sound-absorbing cylinder to the ventilation opening in the middle and lower part of the ceramic sound-absorbing cylinder.

3. A ceramic sound suppression tube for liquid fuel and gas burners as claimed in claim 1 wherein: A plurality of air guide grooves are vertically arranged on the inner simple wall of the ceramic sound-absorbing cylinder, the air guide grooves are uniformly and spacedly distributed along the circumferential direction of the ceramic sound-absorbing cylinder.

4. The ceramic sound suppression tube for liquid fuel and gas burners according to claim 1, wherein: A spiral air guide groove is arranged on the inner simple wall of the ceramic sound-absorbing cylinder.

5. The ceramic sound suppression tube for liquid fuel and gas burners according to claim 1, wherein: The porous ceramic sound-absorbing cylinder is integrally cast by using a porous ceramic material.

6. A ceramic sound suppression tube for liquid fuel and gas burners as claimed in claim 1, wherein: The taper of the ventilation opening and the porous ceramic sound-absorbing cylinder is 15-85 degrees.

7. A ceramic sound suppression tube for liquid fuel and gas burners as claimed in claim 1, wherein: The taper of the guide flared portion is 100-175 degrees.

8. The ceramic sound suppression tube for liquid fuel and gas burners according to claim 1, wherein: The height of the ceramic sound-absorbing cylinder is 50-100 mm.

9. The ceramic sound suppression tube for liquid fuel and gas burners according to claim 1, wherein: The porous ceramic sound-absorbing cylinder is installed in the conical combustion simple wall of a gas stove.

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