Blowing-type gas premixing safe and energy-saving device

Abstract

The invention relates to a blowing-type fuel gas premixing safe energy-saving device which comprises a hollow columnar body, a mixing bin with a plurality of air inlet holes formed in the side face and the bottom face, and first fan blades arranged in the mixing bin, and the body is provided with an air inlet, a fuel gas input port and an air outlet. A plurality of air inlet holes are formed between the first fan blade and the bottom surface of the mixing bin; a first mixing cavity is formed in the mixing bin, and an annular gap is formed between the mixing bin and the body. Air enters the mixing bin through the multiple air inlet holes in the side face and the bottom face, meanwhile, fuel gas enters the lower portion of the mixing bin through the multiple air inlet holes and flows towards the upper portion of the mixing bin under driving of the air after being preliminarily mixed with the air on the lower portion, and when the fuel gas flows through the first fan blades, the flowing direction of the fuel gas is disturbed by the first fan blades; and the premixed gas is fully mixed with the air at the upper part of the mixing bin, and the mixed premixed gas flows out through the gas outlet, so that a better premixing effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of gas equipment, in particular to an accessory of a commercial stove, and more particularly to a blast-type gas premixing safety and energy-saving device. Background Art

[0002] Gas equipment, especially commercial stoves, usually have high power. There are two types of gas used, one is liquefied petroleum gas and the other is natural gas. When burning, commercial stoves generally need to mix gas and air in a certain proportion in advance, which is called "premixing" of gas in the industry. Then the premixed gas is passed into the burner to burn, so that the gas burns more fully and improves the thermal efficiency of the gas equipment.

[0003] The current premixing device generally adopts a mixing chamber. After the air and gas are introduced separately, they are naturally mixed in the mixing chamber, and then the mixed gas is input into the burner. Some products will add additional spoiler ribs or spoiler columns to slightly disrupt the airflow to improve the mixing effect. However, the premixing device of the above structure either has a poor mixing effect or a complex structure. To improve the mixing effect, it is necessary to enlarge or lengthen the mixing chamber to prolong the mixing time of the gas and air. As a result, the product volume is larger, and the amount of gas mixed at one time is too much. Once a flashback occurs, it may cause a violent explosion, which poses a very large safety hazard and seriously threatens people's lives and property. Summary of the invention

[0004] Based on this, it is necessary to provide a blast-type gas premixing safety and energy-saving device, which can not only achieve a better premixing effect, but also has a simple product structure, is safe and reliable, and can be relatively small in size.

[0005] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions.

[0006] The present invention provides a blast-type gas premixing safety and energy-saving device, comprising a hollow cylindrical body and a mixing assembly arranged in the body, the body being provided with an air inlet, a gas input port and an air outlet, the mixing assembly being installed at the gas input port, comprising a mixing bin having a plurality of air inlet holes on the side and bottom surfaces and a first fan blade arranged in the mixing bin, a plurality of air inlet holes connected to the gas input port being provided between the first fan blade and the bottom surface of the mixing bin; a first mixing chamber is formed inside the mixing bin, an annular gap is formed between the mixing bin and the body, and the annular gap is connected to the air inlet.

[0007] Preferably, the first fan blade is fixedly mounted on a gas nozzle, and the gas nozzle is mounted on the gas input port; the multiple air inlet holes are arranged on the side of the gas nozzle.

[0008] Preferably, the first fan blade is rotatably mounted on a gas nozzle, and the gas nozzle is mounted on the gas input port; the multiple air inlet holes are arranged on the side of the gas nozzle.

[0009] Preferably, the first fan blade is fixed on a bearing or a sleeve, a first supporting rod is provided on the air nozzle, and the bearing or the sleeve is sleeved on the first supporting rod.

[0010] Preferably, a second mixing chamber is provided between the mixing chamber and the air outlet, and a second fan blade is provided in the second mixing chamber.

[0011] Preferably, the second fan blade is fixed to the air nozzle via a second supporting rod.

[0012] Preferably, the main body comprises a detachable cover, and the air outlet and the second mixing chamber are arranged on the cover.

[0013] Preferably, the mixing chamber has an upwardly turned edge, and the upwardly turned edge abuts against the bottom of the cover body to isolate the annular gap from the first mixing chamber and the second mixing chamber.

[0014] Preferably, the air inlet and the air outlet are respectively arranged at the upper and lower ends of the body, and the gas input port is arranged on the side of the body and extends to the center position inside the body.

[0015] Preferably, the gas input port is provided with a drainage hole.

[0016] The present invention adopts the above structure. After the air accelerated by the blower enters the annular gap from the air inlet, it enters the mixing chamber through multiple air inlet holes on the side and bottom surfaces. At the same time, the gas enters the lower part of the mixing chamber through multiple air inlet holes, and after preliminary mixing with the air in the lower part, it flows to the upper part of the mixing chamber driven by the air. When flowing through the first fan blade, the gas is disrupted by the first fan blade, so that it is fully mixed with the air in the upper part of the mixing chamber, and the mixed premixed gas flows out through the outlet. It can be seen that no matter how much air and gas are mixed, the present invention can achieve a good premixing effect. In order to improve safety performance and prevent explosions caused by backfire, the product can be made into smaller specifications, which is very safe and reliable when used. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is one of the overall structural schematic diagrams of the blast-type gas premixing safety and energy-saving device in the first embodiment of the present invention;

[0018] Figure 2 This is the second overall structural schematic diagram of the blast-type gas premixing safety and energy-saving device in the first embodiment;

[0019] Figure 3This is a schematic diagram of the exploded structure of the blast-type gas premixing safety and energy-saving device in the first embodiment;

[0020] Figure 4 This is a schematic cross-sectional view of the structure of the blast-type gas premixing safety and energy-saving device in the first embodiment;

[0021] Figure 5 is a schematic diagram of the structure of the first fan blade in the first embodiment;

[0022] Figure 6 This is a schematic diagram of the overall structure of the blast-type gas premixing safety and energy-saving device in the second embodiment;

[0023] Figure 7 This is a schematic cross-sectional view of the structure of the blast-type gas premixing safety and energy-saving device in the second embodiment;

[0024] Figure 8 This is a schematic diagram of the structure of the first fan blade and the second fan blade in the second embodiment.

[0025] The realization of the purpose of the present invention and its functions and principles will be further explained in the specific implementation manner in conjunction with the accompanying drawings. DETAILED DESCRIPTION

[0026] The following is a further description with reference to the accompanying drawings and specific embodiments.

[0027] Embodiment 1:

[0028] like Figure 1-3 As shown, this embodiment provides a blast-type gas premixing safety and energy-saving device 100, which is used to provide premixed gas for a stove, and includes a hollow cylindrical body 10 and a mixing assembly 20 arranged in the body 10, wherein the body 10 is provided with an air inlet 11, a gas input port 12 and a gas outlet 13. The mixing assembly 20 is installed at the gas input port 12, and further includes a mixing chamber 21 with a plurality of air inlet holes 23 arranged on the side and bottom surfaces, and a first fan blade 22 arranged in the mixing chamber 21, and a plurality of air inlet holes 24 connected to the gas input port 12 are arranged between the first fan blade 22 and the bottom surface of the mixing chamber 21, and gas such as liquefied petroleum gas or natural gas is suitable for entering the mixing chamber 21 through the air inlet holes 24. A first mixing chamber 30 is formed inside the mixing chamber 21, and an annular gap 40 is formed between the outside of the mixing chamber 21 and the main body 10. The annular gap 40 is communicated with the air inlet 11. The air blown in by the blower is suitable for entering the annular gap 40 through the air inlet 11 and entering the mixing chamber 21 through the above-mentioned multiple air inlet holes 23, so that the gas and air are premixed in the first mixing chamber 30.

[0029] Further, refer to Figure 4As shown, the first fan blade 22 is fixedly mounted on a gas nozzle 25, and the gas nozzle 25 is threadedly mounted on the above-mentioned gas input port 12, and a plurality of air inlet holes 24 are arranged on the side of the gas nozzle 25. When the gas enters the first mixing chamber 30 through the air inlet hole 24, it is preliminarily mixed with the air entering from the air inlet hole 23 arranged on the side and bottom of the mixing chamber 21. The premixed gas flows toward the gas outlet 13. When passing through the first fan blade 22, the airflow is disrupted, so that the gas and air are further accelerated to mix, thereby greatly improving the mixing efficiency. The fully mixed premixed gas flows out through the gas outlet 13 and enters the burner for combustion. Since the gas and air in the premixed gas are fully mixed, they can be more fully burned, which effectively improves the thermal efficiency of the stove and makes the stove more energy-saving and environmentally friendly.

[0030] In order to further improve the mixing efficiency, in this embodiment, the first blade 22 can also be rotatably mounted on the air nozzle 25. Figure 5 As shown, the first blade 22 is fixed on a bearing or a sleeve 26, and a first support rod 27 is provided on the gas nozzle 25. The bearing or the sleeve 26 is sleeved on the first support rod 27, so that the first blade 22 can rotate around the first support rod 27. As the air is accelerated by the blower to form wind, the first blade 22 will rotate under the action of wind force, thereby generating a greater turbulence effect on the primary mixed gas, thereby achieving the effect of improving the premixing effect, and making the air and gas in the premixed gas more evenly mixed.

[0031] For the sake of simple structure and aesthetics, the air inlet 11 and the air outlet 13 of this embodiment are respectively arranged at the upper and lower ends of the body 10, and the gas input port 12 is arranged on the side of the body 10 and extends to the center position inside the body 10. This is both aesthetically pleasing and convenient for connecting the burner head and the gas and air pipes.

[0032] In addition, the present embodiment is also provided with a drainage hole 121 at the gas inlet port 12. When water or oil enters the product through the burner head, the water or oil will flow into the gas inlet port 12 along the gas outlet 13, the second mixing chamber 50, the first mixing chamber 30 and the air inlet 24 in sequence, and finally be discharged from the drainage hole 121, thereby achieving the effect of preventing blockage.

[0033] Embodiment 2:

[0034] Reference Figure 6-7 As shown, this embodiment provides another blast-type gas premixing safety and energy-saving device 200, the structure of which is basically the same as that in the first embodiment, the main difference is that this embodiment further provides a second mixing chamber 50 between the mixing chamber 21 and the gas outlet 13, and a second fan blade 28 is provided in the second mixing chamber 50.

[0035] Specifically, the body 10 includes a detachable cover 14, and the air outlet 13 and the second mixing chamber 50 are arranged on the cover 14. Preferably, the cover 14 has a boss 15 extending outward, and the boss 15 is hollow to form a cavity, and the part close to the first mixing chamber 30 is the second mixing chamber 40, and the part close to the outside of the cover 14 is the air outlet 13. In other implementations of this embodiment, the cavity in the boss 15 can be stepped, and the diameter of the air outlet 13 is smaller than the diameter of the second mixing chamber 50.

[0036] The second blade 28 may be fixed to the wall of the second mixing chamber 50, or may be fixed to the wall of the second mixing chamber 50. Figure 8 The structure shown is fixed on the air nozzle 25 via a second supporting rod 29 , and the first supporting rod 27 is fixedly connected with the second supporting rod 29 or is integrally formed.

[0037] After the gas and air are mixed in the first mixing chamber 30, the airflow enters the second mixing chamber 50. On the one hand, under the turbulent and limiting effects of the second fan blades 28, the airflow can be broken up and the airflow velocity can be slowed down, so that the gas and air are mixed more evenly; on the other hand, since the second fan blades 28 are close to the air outlet 13, the premixed gas ejected from the air outlet 13 will form a vortex with a certain pressure after passing through the second fan blades 28, so that the pressure of the premixed gas when entering the burner for combustion is more constant, even if the pressure of the gas source changes, it will not affect the flame, thereby making the flame generated by the combustion more stable.

[0038] In addition, under the action of the second fan blade 28, the premixed gas ejected from the gas outlet 13 is a vortex with a certain pressure, which achieves a pressurization effect, and is therefore less likely to backfire, thereby reducing the possibility of explosion and effectively improving the safety performance of the product.

[0039] In this embodiment, the upper end of the mixing chamber 21 has an outwardly folded upper edge 211, which abuts against the bottom of the cover body 14, thereby isolating the annular gap 40 from the first mixing chamber 30 and the second mixing chamber 50, so that air can only enter from the air inlet 23 opened on the mixing chamber 21, and prevent air from entering from the gap between the cover body 14 and the mixing chamber 21, so as to achieve full mixing of air and gas. In this embodiment, a step can be set in the body 10, and the diameter of the upper edge 211 of the mixing chamber 21 is set to match the diameter of the step, so that the mixing chamber 21 can be placed before the cover body 14 is installed, so that the mixing chamber 21 is supported on the step, and after the cover body 14 is installed, the mixing chamber 21 is clamped and fixed by the cover body 14 and the body 10, which can also simplify the installation and fixation of the mixing chamber 21, without the need to additionally set fastening structures or fasteners such as threads.

[0040] In summary, in the blast-type gas premixing safety and energy-saving device of the present invention, the air accelerated by the blower enters the annular gap through the air inlet, and then enters the mixing chamber through multiple air inlet holes on the side and bottom surfaces. At the same time, the gas enters the lower part of the mixing chamber through multiple air inlet holes, and after preliminary mixing with the air in the lower part, it flows to the upper part of the mixing chamber driven by the air. When flowing through the first fan blade, the gas is disrupted in its flow direction by the first fan blade, so that it is fully mixed with the air in the upper part of the mixing chamber, and the mixed premixed gas flows out through the outlet. It can be seen that no matter how much air and gas are mixed, the present invention can achieve a good premixing effect. In order to improve safety performance and prevent explosions caused by backfire, the product can be made into smaller specifications, which is very safe and reliable when used.

[0041] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A blast-type gas premixing safety and energy-saving device, comprising a hollow cylindrical body and a mixing assembly arranged in the body, wherein the body is provided with an air inlet, a gas input port and a gas outlet, and is characterized in that: The mixing assembly is installed at the gas input port, and includes a mixing chamber with multiple air inlet holes on the side and bottom surfaces and a first fan blade arranged in the mixing chamber, and multiple air inlet holes connected to the gas input port are arranged between the first fan blade and the bottom surface of the mixing chamber; a first mixing chamber is formed inside the mixing chamber, and an annular gap is formed between the mixing chamber and the main body, and the annular gap is connected to the air inlet.

2. The blast type gas premixing safety and energy saving device according to claim 1, characterized in that: The first fan blade is fixedly mounted on a gas nozzle, and the gas nozzle is mounted on the gas input port; the multiple air inlet holes are arranged on the side of the gas nozzle.

3. The blast type gas premixing safety and energy saving device according to claim 1, characterized in that: The first fan blade is rotatably mounted on a gas nozzle, and the gas nozzle is mounted on the gas input port; the multiple air inlet holes are arranged on the side of the gas nozzle.

4. The blast type gas premixing safety and energy saving device according to claim 3, characterized in that: The first fan blade is fixed on a bearing or a shaft sleeve, a first supporting rod is arranged on the air nozzle, and the bearing or the shaft sleeve is sleeved on the first supporting rod.

5. The blast type gas premixing safety and energy saving device according to claim 3 or 4, characterized in that: A second mixing chamber is provided between the mixing chamber and the air outlet, and a second fan blade is provided in the second mixing chamber.

6. The blast type gas premixing safety and energy saving device according to claim 5, characterized in that: The second fan blade is fixed on the air nozzle through a second supporting rod.

7. The blast type gas premixing safety and energy saving device according to claim 5, characterized in that: The main body comprises a detachable cover, and the air outlet and the second mixing chamber are arranged on the cover.

8. The blast type gas premixing safety and energy saving device according to claim 7, characterized in that: The mixing chamber has an upwardly turned edge, and the upwardly turned edge abuts against the bottom of the cover body to isolate the annular gap from the first mixing chamber and the second mixing chamber.

9. The blast type gas premixing safety and energy saving device according to claim 1, characterized in that: The air inlet and the air outlet are respectively arranged at the upper and lower ends of the body, and the gas input port is arranged on the side of the body and extends to the center position inside the body.

10. The blast type gas premixing safety and energy saving device according to claim 1 or 9, characterized in that: The gas input port is provided with a drainage hole.

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