Duct premixing device for far infrared energy-saving stove

Abstract

The utility model relates to a duct premixing device for a far infrared energy-saving stove. The duct premixing device is arranged between a gas pipeline and a stove opening and comprises a gas mixing pipeline, a gas mixing chamber, a lower stove plate, an air inlet and a gas connector. The air inlet is a hollow metal casting with a window, one side of the air inlet is connected with the gas connector, and the other side of the air inlet is connected with a gas mixing pipeline. The gas mixing pipeline is divided into three parts, a trumpet-shaped pipeline I is connected with the air inlet, and the pipeline I is gradually narrowed and then is connected with a long cylindrical pipeline II; the pipeline II is fixedly connected with the gas mixing chamber through a pipeline III with a thickened pipe wall; and the gas nozzle is over against the interior of the gas mixing chamber. By means of the gas mixing pipeline and the gas mixing chamber, gas and air can be mixed before entering the cooking range, the combustion efficiency is improved, and the energy-saving efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of cooking stoves, and provides a duct premixing device for a far-infrared energy-saving stove. Background Art

[0002] The far-infrared energy-saving stove generates far-infrared radiant heat energy during the combustion process through special materials and structures; far-infrared rays refer to infrared rays with wavelengths ranging from 1.5 to 400 micrometers in the infrared spectrum. Far-infrared rays have strong penetration power and uniform heating effects in radiant heat energy. When used on burners such as stoves, the energy-saving effect is remarkable. Compared with traditional high-power stoves, far-infrared energy-saving stoves (also known as infrared burners, infrared gas stoves, infrared energy-gathering stoves, etc. in the market) can make more full use of oxygen and fuel in the air, reduce energy waste, and achieve energy-saving effects.

[0003] However, the existing far-infrared energy-saving stoves generally include a heating plate, an ejector pipe, a nozzle, etc. Due to insufficient or unstable air pressure after the mixing of gas and air, problems such as difficult ignition, low energy-saving efficiency, and flashback may occur as the temperature continues to rise. Therefore, it is necessary to further improve. Chinese Patent No. 201410029451.8 discloses an infrared gas stove, which is provided with a bracket above the burner head. The bracket has an air passage for supplying secondary air to the infrared radiation ceramic plate, which can supplement secondary air to the infrared radiation ceramic plate and improve the combustion efficiency. Chinese Patent No. 201210187410.2 discloses a new type of infrared energy-gathering stove, which is provided with a gas guide pipe on the gas nozzle, and an oxygen-increasing device is connected to the gas guide pipe to improve the combustion efficiency and achieve energy-saving effects. However, the above patents still do not solve the problems of difficult ignition and flashback caused by insufficient or unstable air pressure of the mixed gas in the existing far-infrared energy-saving stoves. At the same time, due to insufficient or unstable air pressure of the mixed gas, traditional far-infrared gas stoves have problems of low combustion efficiency and insufficient energy-saving efficiency. In addition, existing high-power stoves or far-infrared energy-saving stoves all have the problem of excessive noise during combustion operation, generally exceeding 65 decibels. For people who work in the kitchen for a long time, the noise pollution problem of existing gas stoves needs to be solved urgently.

[0004] To solve the above problems, for far-infrared energy-saving stoves, the first thing to solve is to mix gas and air evenly and adjust the pressure to a range suitable for the combustion of the energy-saving stove. However, for existing infrared burners, their gas channels or ejector pipes do not have the concept of specifically mixing air and gas and adjusting the pressure before combustion, nor is there any relevant technical content disclosed in the literature. Summary of the Utility Model

[0005] The object of the present utility model is to provide a duct premixing device for a far-infrared energy-saving stove, aiming to solve the problems in the prior art such as low combustion efficiency, easy occurrence of flashback, difficult ignition, and high noise of the far-infrared energy-saving stove.

[0006] The present utility model is implemented as follows. A duct premixing device for a far-infrared energy-saving stove is provided. The duct premixing device is arranged between a gas pipeline and a stove opening. The duct premixing device includes a mixing gas pipeline, a mixing chamber, a lower stove plate, an air inlet, and a gas connector. One end of the gas connector is connected to the gas pipeline, and the other end penetrates through and is connected to the air inlet and is connected with a gas nozzle. The air inlet is a hollow metal casting with openings. One side is connected to the gas connector, and the other side is connected to the mixing gas pipeline. The mixing gas pipeline is divided into three parts. The part connected to the air inlet is a horn-shaped pipeline one. The pipeline one gradually narrows and then is connected to a long cylindrical pipeline two. The pipeline two is fixedly connected to the mixing chamber through a pipeline three with a thickened pipe wall. One side of the mixing chamber is connected to the pipeline three of the mixing gas pipeline, and the other side bends upward and is connected to the lower stove plate. The gas nozzle is directly opposite to the inside of the mixing chamber.

[0007] Further, the air inlet is semi-cylindrical, and the longitudinal section of the semi-cylindrical shape is a first opening, and the opening direction is towards the ground.

[0008] Further, a second opening is arranged at a position on the air inlet opposite to the first opening.

[0009] In another embodiment of the present utility model, an air pump connector is arranged on the mixing gas pipeline.

[0010] Further, the air pump connector is connected to an air pump or a fan.

[0011] For the duct premixing device of the far-infrared energy-saving stove of the present utility model, the mixing gas pipeline, the mixing chamber, the lower stove plate, and the air inlet are all metal castings.

[0012] The beneficial effects of the present utility model:

[0013] A duct premixing device for a far-infrared energy-saving stove provided by the present utility model can mix gas and air before entering the stove through the provided gas mixing pipeline and mixing chamber, improving the combustion efficiency and energy-saving efficiency. The duct premixing device of the present utility model utilizes the structural feature that the gas nozzle is directly facing the inside of the mixing chamber, and the gas nozzle is arranged in the air inlet with a window, so that when the gas is directly injected into the mixing chamber, it drives the air to enter the mixing chamber together through the gas mixing pipeline. And the gas mixing pipeline is divided into three parts. The pipeline 1 connected to the air inlet is a trumpet-shaped pipeline 1, and the pipeline 1 is gradually narrowed and then connected to a long cylindrical pipeline 2; the pipeline 2 is fixedly connected to the mixing chamber through a pipeline 3 with a thickened pipe wall. Such a gradually narrowed gas mixing channel makes it easy for gas to enter and difficult to exit, and the mixed gas transported into the mixing chamber can be pressurized in the mixing chamber. Since the pressure of the mixed gas is sufficient, the problems of difficult ignition and backfire caused by insufficient or unstable air pressure of the mixed gas in the existing far-infrared energy-saving stove are solved. The premixed gas enters the combustion plate after decompression, which can realize the full combustion of the combustible gas and improve the energy-saving efficiency. Since the premixed gas can be fully combusted, the noise during the combustion process can be significantly reduced. At the same time, the pipeline 3 with a thickened pipe wall plays a role in ensuring the safe use of the far-infrared energy-saving stove. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 FIG. 1 is a first structural schematic diagram of a duct premixing device for a far-infrared energy-saving stove provided by an embodiment of the present utility model;

[0015] Figure 2 FIG. 2 is a second structural schematic diagram of a duct premixing device for a far-infrared energy-saving stove provided by an embodiment of the present utility model;

[0016] Figure 3 FIG. 3 is a bottom view schematic diagram of the duct premixing device in an embodiment of the present utility model installed on a far-infrared energy-saving stove.

[0017] In the drawings: 1. Gas mixing pipeline; 2. Mixing chamber; 3. Lower furnace plate; 4. Air inlet; 5. Gas connector; 6. Air pump connector; 7. Fan; 9. Stove opening; 11. Pipeline 1; 12. Pipeline 2; 13. Pipeline 3; 41. First window; 42. Second window; 51. Gas nozzle; 91. Stove opening bottom plate; 92. Furnace plate support. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0019] As Figures 1 to 3As shown in the figure, this embodiment provides a duct premixing device for a far-infrared energy-saving stove. The duct premixing device is arranged between a gas pipeline and a stove opening 9. Figure 1 The first structure shown is a schematic structural diagram of the back of the duct premixing device. The duct premixing device includes a gas mixing pipeline 1, a gas mixing chamber 2, a lower stove plate 3, an air inlet 4, and a gas connector 5. One end of the gas connector 5 is connected to the gas pipeline, and the other end penetrates into the air inlet 4 and is connected with a gas nozzle 51. The air inlet 4 is a hollow metal casting with openings, connected to the gas connector 5 on one side and the gas mixing pipeline 1 on the other side. The gas mixing pipeline 1 is divided into three parts. The part connected to the air inlet 4 is a trumpet-shaped pipeline one 11, which gradually narrows and then connects to a long cylindrical pipeline two 12. The pipeline two 12 is fixedly connected to the gas mixing chamber 2 through a pipeline three 13 with a thickened pipe wall. One side of the gas mixing chamber 2 is connected to the pipeline three 13 of the gas mixing pipeline 1, and the other side bends upward and connects to the lower stove plate 3. The gas nozzle 51 faces the inside of the gas mixing chamber 2. The lower stove plate 3 is detachably connected to the stove opening bottom plate 91 through a stove plate bracket 92, and other accessories required for other stove heads are connected inside the lower stove plate 3, including pressure-reducing accessories and far-infrared combustion panels, etc.

[0020] For the duct premixing device of the far-infrared energy-saving stove of the present utility model, the gas mixing pipeline 1, the gas mixing chamber 2, the lower stove plate 3, and the air inlet 4 are all metal castings.

[0021] During installation, connect the gas pipeline to the gas connector 5. During use, open the gas pipeline, and the gas jets straight along the gas nozzle 51 and enters the gas mixing chamber 2 along the gas mixing pipeline 1. The air inlet 4 is provided with openings, and air enters along with the gas and enters the gas mixing chamber 2 along the gas mixing pipeline 1. The pipeline one 11 of the gas mixing pipeline 1 is trumpet-shaped, and after gradually narrowing, it connects to the long cylindrical pipeline two 12. The pipeline two 12 is fixedly connected to the gas mixing chamber 2 through a pipeline three 13 with a thickened pipe wall, making it easy for the mixed gas to enter the gas mixing chamber and difficult to exit. The continuously incoming mixed gas is pressurized in the gas mixing chamber, and then reaches the far-infrared combustion panel through the pressure-reducing accessories installed in the lower stove plate 3, thus ensuring successful ignition of the stove plate. And because the air pressure inside the stove plate is always lower than the air pressure inside the gas mixing chamber, backfire of the far-infrared combustion panel downward is avoided when the temperature rises, ensuring the safe use of the far-infrared energy-saving stove. The pre-mixed and pressurized gas is decompressed and then enters the combustion plate, which can achieve full combustion of the combustible gas and improve the energy-saving efficiency. Since the pre-mixed gas can be fully combusted, the noise during the combustion process can be significantly reduced. Both the pipeline three 13 and the gas mixing chamber 2 are made of metal castings with thickened pipe walls, ensuring the safe use of the duct premixing device and the far-infrared energy-saving stove under the pressurized state of the mixed gas.

[0022] In this embodiment, the air inlet 4 is semi-cylindrical. The longitudinal section of the semi-cylindrical shape is the first opening 41, and the opening direction is towards the ground. Setting the entire longitudinal section of the semi-cylindrical shape as an opening can expand the air flow entering the mixing channel and improve the pressurization efficiency of the mixed gas in the mixing chamber to reach the ignition state pressure.

[0023] In another embodiment, a second opening 42 is provided at a position on the air inlet 4 opposite to the first opening 41. The two openings enable a greater air flow into the mixing channel and a higher mixed gas pressurization efficiency.

[0024] In another embodiment, an air pump connector 6 is provided on the mixing pipeline 1. The air pump connector 6 is connected to an air pump or a fan 7. The air pump connector 6 is normally closed. When the air pressure of the gas source connected to the gas pipeline is relatively low, the air pump or the fan 7 can be turned on to pressurize the mixing chamber, ensuring that the air pressure of the mixed gas can meet the ignition requirements of the far-infrared energy-saving stove. When the air pump or the fan is turned on, other openings of the air inlet can be sealed, enabling the gas and air to enter the mixing chamber at a higher efficiency to achieve rapid mixing and pressurization.

[0025] The duct premixing device for a far-infrared energy-saving stove provided by the present utility model can mix and pressurize gas and air before entering the stove by means of the gradually narrowing mixing channel and mixing chamber provided, improving the combustion efficiency and solving the problems of difficult ignition and flashback in the prior art due to insufficient or unstable air pressure of the mixed gas in the far-infrared energy-saving stove. The structure of the present utility model is simple, the cost is low, the use is safe, and it is easy to be popularized and applied.

[0026] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A duct premixing device for a far-infrared energy-saving stove, characterized in that The duct premixing device is arranged between the gas pipeline and the stove opening. The duct premixing device includes a gas mixing pipeline (1), a gas mixing chamber (2), a lower stove top (3), an air inlet (4), and a gas connector (5); one end of the gas connector (5) is connected to the gas pipeline, and the other end penetrates into the air inlet (4) and is connected with a gas nozzle (51); the air inlet (4) is a hollow metal casting with openings, one side is connected to the gas connector (5), and the other side is connected to the gas mixing pipeline (1); the gas mixing pipeline (1) is divided into three parts. The part connected to the air inlet (4) is a trumpet-shaped pipeline one (11), and the pipeline one (11) gradually narrows and then connects to a long cylindrical pipeline two (12); the pipeline two (12) is fixedly connected to the gas mixing chamber (2) through a pipeline three (13) with a thickened pipe wall; one side of the gas mixing chamber (2) is connected to the pipeline three (13) of the gas mixing pipeline (1), and the other side bends upward to connect to the lower stove top (3); the gas nozzle (51) faces the inside of the gas mixing chamber (2).

2. The duct premixing device for a far-infrared energy-saving stove according to claim 1, wherein, The air inlet (4) is semi-cylindrical, and the longitudinal section of the semi-cylinder is a first opening (41), and the opening direction is towards the ground.

3. The ducted premixing device for the far-infrared energy-saving stove according to claim 2, wherein A second opening (42) is arranged at a position on the air inlet (4) opposite to the first opening (41).

4. The duct premixing device for a far-infrared energy-saving stove according to claim 1, wherein An air pump connector (6) is arranged on the gas mixing pipeline (1).

5. The duct premixing device for a far-infrared energy-saving stove according to claim 4, characterized in that The air pump connector (6) is connected to an air pump or a fan.

6. The duct premixing device for a far-infrared energy-saving stove according to claim 1, wherein The gas mixing pipeline (1), the gas mixing chamber (2), the lower stove top (3), and the air inlet (4) are all metal castings.

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