Blowing-type gas premixing safe and energy-saving device

Abstract

The utility model 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 utility model 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 appliances, especially commercial stoves, are typically high-powered and use two types of gas: liquefied petroleum gas (LPG) and natural gas. Commercial stoves typically pre-mix the gas and air in a specific ratio before combustion, a process known in the industry as "pre-mixing" the gas. This pre-mixed gas is then passed into the burner to ensure more complete combustion and improve the thermal efficiency of the gas appliance.

[0003] Current premixing devices generally use a mixing chamber. After 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, the mixing chamber needs to be enlarged or lengthened to extend the mixing time of the gas and air. This makes the product larger in size, 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. Utility Model Content

[0004] Based on this, it is necessary to provide a blast-type gas premixing safety and energy-saving device, which can not only achieve 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 purpose of the invention, the present utility model adopts the following technical solutions.

[0006] The utility model 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 on the gas input port, comprising a mixing chamber with a plurality of air inlet holes provided on the side and bottom surfaces and a first fan blade arranged in the mixing chamber, a plurality of air inlet holes communicating with the gas input port being provided between the first fan blade and the bottom surface of the mixing chamber; a first mixing chamber is formed inside the mixing chamber, an annular gap is formed between the mixing chamber and the body, and the annular gap is communicated with 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 inlet; 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 inlet; 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 support rod is provided on the air nozzle, and the bearing or the sleeve is sleeved on the first support 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 includes a detachable cover, and the air outlet and the second mixing chamber are provided on the cover.

[0013] Preferably, the mixing chamber has an upward turning edge, and the upward turning 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 utility model adopts the above structure. After the air accelerated by the blower enters the annular gap through 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, is initially mixed with the air in the lower part, and then flows toward 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. The mixed premixed gas flows out through the outlet. It can be seen that no matter how much air and gas are mixed, the utility model can achieve a good premixing effect. In order to improve safety performance and prevent backfire explosion, 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 diagrams of the blast-type gas premixing safety and energy-saving device in the first embodiment;

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

[0021] Figure 5 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 blast-type gas premixing safety and energy-saving device in the second embodiment;

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

[0025] The realization of the purpose of the utility model 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] Example 1:

[0028] like Figure 1-3 As shown, this embodiment provides a blast-type gas premixing safety and energy-saving device 100 for providing premixed gas for a stove. The device comprises a hollow cylindrical body 10 and a mixing assembly 20 disposed within the body 10. The body 10 is provided with an air inlet 11, a gas input port 12, and an air outlet 13. The mixing assembly 20 is mounted on the gas input port 12 and further comprises a mixing chamber 21 having a plurality of air inlet holes 23 disposed on both the side and bottom surfaces thereof, and a first fan blade 22 disposed within the mixing chamber 21. A plurality of air inlet holes 24 communicating with the gas input port 12 are disposed between the first fan blade 22 and the bottom surface of the mixing chamber 21. Gases such as liquefied petroleum gas or natural gas are 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 connected to 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 screwed onto the above-mentioned gas input port 12. A plurality of air inlet holes 24 are provided 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 holes 23 provided 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, which further accelerates the mixing of the gas and air, 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 burned more fully, 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, the first fan blade 22 can be rotatably mounted on the air nozzle 25 in this embodiment. Figure 5 As shown, the first blade 22 is fixed to a bearing or sleeve 26, and a first support rod 27 is provided on the gas nozzle 25. The bearing or 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 rotates under the action of the wind, thereby generating a greater turbulence effect on the premixed 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 a simple structure and aesthetics, the air inlet 11 and the air outlet 13 of this embodiment are respectively disposed at the upper and lower ends of the body 10, and the gas inlet 12 is disposed on the side of the body 10 and extends to the center of the body 10. This is both aesthetically pleasing and convenient for connecting the burner head and the gas and air pipes.

[0032] In addition, this embodiment also provides a drainage hole 121 at the gas inlet 12. When water or oil enters the product through the burner, the water or oil will flow into the gas inlet 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 preventing blockage.

[0033] Example 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 being 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 removable cover 14, on which the air outlet 13 and the second mixing chamber 50 are disposed. Preferably, the cover 14 has an outwardly extending boss 15, which is hollow and forms a cavity. The portion near the first mixing chamber 30 constitutes the second mixing chamber 40, and the portion near the outside of the cover 14 constitutes the air outlet 13. In other implementations of this embodiment, the cavity within the boss 15 can be stepped, with the diameter of the air outlet 13 being smaller than the diameter of the second mixing chamber 50.

[0036] The second blade 28 can be fixed on the wall of the second mixing chamber 50, or can be fixed on the wall of the second mixing chamber 50. Figure 8 The structure shown is fixed to the gas nozzle 25 via a second support rod 29 , and the first support rod 27 and the second support rod 29 are fixedly connected or 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 speed 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 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, so it is 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 through the air inlet 23 provided in the mixing chamber 21, preventing air from entering through the gap between the cover body 14 and the mixing chamber 21, thereby achieving sufficient mixing of air and gas. In this embodiment, a step can be provided within 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. In this way, 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. After the cover body 14 is installed, the mixing chamber 21 is clamped and fixed by the cover body 14 and the body 10. This can also simplify the installation and fixation of the mixing chamber 21, without the need for additional fastening structures or fasteners such as threads.

[0040] In summary, the utility model of the blast-type gas premixing safety and energy-saving device, after the air accelerated by the blower enters the annular gap from the air inlet, enters the mixing chamber through multiple air inlet holes on the side and bottom surfaces, and 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 in its flow direction, 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 utility model 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-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the scope of the present invention, all of which fall within the scope of protection 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 disposed within 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 inlet, 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 inlet are provided 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 provided 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 includes 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 upward turning edge, and the upward turning 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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