Gas anti-reversing device of full-premixing wall-hanging stove
By designing anti-backflow devices such as baffles and anti-backflow baffles in the wall-hung boiler, the problems of flame backflow and condensate corrosion in condensing wall-hung boilers have been solved, thus improving safety and durability.
Patent Information
- Application Number
- CN202423218528.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-25
AI Technical Summary
Condensing wall-hung boilers pose a risk of flame backflow in cases of poor combustion or deflagration, and condensate water can easily flow back and corrode the equipment when not in operation.
Design a gas backflow prevention device for a fully premixed wall-hung boiler, including a flange and an anti-backflow baffle. The flange has an inclined surface on the side facing away from the fan. The anti-backflow baffle is hinged to the flange and equipped with a sealing component and a transition chamber to prevent backflow of flame and condensate.
It effectively prevents the backflow of flames and high-temperature flue gas in the combustion chamber, protects the fan and external components of the combustion chamber, prevents corrosion, and improves combustion efficiency and equipment reliability.
Smart Images
Figure CN223677783U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of wall-mounted furnaces, in particular to a full premixing wall-mounted furnace gas anti-reversing device. BACKGROUND
[0002] Wall-mounted furnaces, as a kind of efficient home heating equipment, are widely used in modern families. With the progress of technology, condensing wall-mounted furnaces are favored due to their higher energy efficiency and environmental performance. This kind of wall-mounted furnace adjusts the proportion of air and gas through full premixing, so that the air and gas are fully mixed before entering the combustion chamber for combustion, thereby realizing higher energy conversion efficiency and lower emissions. However, this combustion method also brings some new challenges, especially the increasing demand for safety and durability.
[0003] At present, in the condensing wall-mounted furnaces adopted, there are still some deficiencies: when there is poor combustion or deflagration, the impact gas pressure in the combustion chamber may cause the risk of flame backflow. In addition, during the non-working period of the wall-mounted furnace, it is easy to cause the backflow of condensate water vapor, which causes corrosion to the fan and the components outside the combustion chamber, shortening the service life of the equipment. CONTENT OF THE INVENTION
[0004] The present application provides a full premixing wall-mounted furnace gas anti-reversing device, which can prevent the backflow of condensate water vapor or incomplete combustion gas in the combustion chamber by separating the combustion chamber. The following technical solutions are adopted:
[0005] A full premixing wall-mounted furnace gas anti-reversing device, comprising a baffle and an anti-reversing baffle; the baffle is arranged at the air outlet of the fan;
[0006] The side of the baffle away from the fan is a slope, and the width of the baffle gradually increases from top to bottom, the anti-reversing baffle is located at the side of the baffle away from the fan, and the anti-reversing baffle is hinged to the upper side of the baffle;
[0007] The baffle is further provided with a sealing assembly.
[0008] By adopting the above technical solutions, the backflow of flame or high-temperature smoke in the combustion chamber can be effectively prevented, and the fan and the gas components outside the combustion chamber are protected from damage. At the same time, when the wall-mounted furnace is not working, the anti-reversing baffle naturally falls to close the channel by gravity, preventing condensate water vapor from entering the fan and the outside of the combustion chamber, and avoiding rust caused by water vapor erosion of the equipment. In addition, the baffle is designed as a slope structure, which helps to guide the premixed gas to smoothly enter the combustion chamber, improving the combustion efficiency.
[0009] Preferably, the sealing assembly comprises a sealing gasket; the inner side of the baffle is provided with an abutting plate, and the sealing gasket is arranged on the abutting plate; the circumferential side of the anti-reversing baffle is provided with a sealing groove, and when the anti-reversing baffle abuts against the baffle, the sealing gasket is embedded in the sealing groove.
[0010] By adopting the technical scheme, the sealing gasket in the sealing assembly is embedded with the sealing groove on the reverse blocking plate to form a tight sealing structure, thereby enhancing the sealing performance when the reverse blocking plate is closed and effectively preventing the reverse flow of high-temperature gas and flame in the combustion chamber.
[0011] Preferably, the reverse blocking plate comprises a windproof plate and a counterweight plate, the counterweight plate is arranged outside the blocking rim and is hinged to the upper side of the blocking rim, the windproof plate is arranged between the counterweight plate and the abutting plate, and the windproof plate is hinged to the blocking rim; the sealing groove is arranged on the side of the windproof plate facing the abutting plate.
[0012] By adopting the technical scheme, the reverse blocking plate can be automatically closed under the action of gravity, effectively preventing the backflow of flame during poor combustion or deflagration, and preventing the backflow of condensed water vapor to the fan and the combustion chamber outside, thereby protecting the gas components from corrosion. The sealing groove is arranged on the side of the windproof plate facing the abutting plate, which ensures that the reverse blocking plate is tightly fitted with the blocking rim when it is closed, thereby further improving the sealing performance and preventing gas leakage.
[0013] Preferably, the windproof plate is arranged as a rubber plate, and the counterweight plate is arranged as a metal plate.
[0014] By adopting the technical scheme, the windproof plate is arranged as a rubber plate, which has good flexibility and sealing performance, can effectively prevent gas leakage, and at the same time reduce mechanical wear and tear and prolong the service life. The counterweight plate is arranged as a metal plate, which increases the weight of the reverse blocking plate, so that it can be reliably closed under its own gravity in a non-working state, preventing the backflow of condensed water vapor and protecting the fan and the combustion chamber components from corrosion.
[0015] Preferably, a clamping groove is formed between the blocking rim and the abutting plate, and the windproof plate is located inside the clamping groove.
[0016] By adopting the technical scheme, the sealing performance between the reverse blocking plate and the blocking rim is significantly improved. Specifically, the clamping groove formed between the blocking rim and the abutting plate can better accommodate the windproof plate, improve the sealing effect, effectively prevent gas leakage and condensed water backflow, and improve the safety and reliability of the wall-mounted stove.
[0017] Preferably, the peripheral side of the counterweight plate extends to the outside of the blocking rim.
[0018] By adopting the technical scheme, the counterweight plate can fully protect the windproof plate when it is closed, ensuring that the windproof plate is not affected by the smoke inside the combustion chamber, thereby ensuring the normal operation of the windproof plate.
[0019] Preferably, a transition chamber is arranged, one end of the transition chamber is an air inlet end and is connected with the fan, the blocking rim and the reverse blocking plate are both located in the transition chamber; a fireproof door is arranged at the air outlet end, and the fireproof door is hinged to the transition chamber.
[0020] By adopting the above technical solution, the transition chamber and the fireproof door are further enhanced in the anti-reverse function. In the case of poor combustion or deflagration, the fireproof door can be quickly closed under the action of the impact air pressure, effectively preventing the reverse flow of fire and high-temperature gas, and protecting the fan and other components outside the combustion chamber from damage.
[0021] Preferably, a connecting rod is arranged between the fireproof door and the anti-reverse baffle, one end of the connecting rod is hinged to the anti-reverse baffle, and the other end is hinged to the fireproof door.
[0022] By adopting the above technical solution, the connecting rod structure between the anti-reverse baffle and the fireproof door can effectively link the two, ensuring that the fireproof door is quickly closed in the event of an abnormal situation in the combustion chamber, further enhancing safety performance. At the same time, this linkage design simplifies the structural complexity of the device, improves response speed and reliability.
[0023] In summary, the present application includes at least one of the following beneficial technical effects:
[0024] 1. The anti-reverse baffle is hinged to the upper side of the baffle rim, and the side of the baffle rim facing away from the fan is inclined, with the width gradually increasing from top to bottom, so that the anti-reverse baffle can quickly close the passage in the event of poor combustion or deflagration, preventing the impact air pressure in the combustion chamber from blowing open the anti-reverse baffle and reducing the risk of flame backflow;
[0025] 2. The transition chamber and the fireproof door are further enhanced in the anti-reverse function. The connecting rod structure between the anti-reverse baffle and the fireproof door can effectively link the two, ensuring that the fireproof door is quickly closed in the event of an abnormal situation in the combustion chamber, further enhancing safety performance. At the same time, this linkage design simplifies the structural complexity of the device, improves response speed and reliability. BRIEF DESCRIPTION OF DRAWINGS
[0026] Figure 1 is a structural schematic diagram of the full-premix wall-hung gas boiler anti-reverse device in Embodiment 1 of the present application;
[0027] Figure 2 is a structural schematic diagram of the anti-reverse device in Embodiment 2 of the present application;
[0028] Figure 3 is a sectional view of the anti-reverse device in Embodiment 2 of the present application and is mainly used to show the structure of the transition chamber;
[0029] Figure 4 is Figure 3 a partial enlarged schematic diagram of part A in FIG. 6.
[0030] Marked in the drawing: 1, baffle; 11, abutment plate; 12, sealing gasket; 2, reverse prevention baffle; 21, wind shield; 211, sealing groove; 22, counterweight plate; 3, transition chamber; 4, fire door; 5, connecting rod; 6, fan; 7, combustion chamber. DETAILED DESCRIPTION
[0031] The following will be described in detail in combination with the accompanying drawings. Figures 1-4 The application is further described in detail.
[0032] Example 1
[0033] The full premix wall-hanging stove gas reverse prevention device provided by the embodiments of the application refers to Figure 1 , which comprises a baffle 1 and a reverse prevention baffle 2, wherein the baffle 1 is arranged at the air outlet of the fan 6, the side of the baffle 1 away from the fan 6 is a slope, and the width of the baffle 1 gradually increases from top to bottom, the reverse prevention baffle 2 is located at the side of the baffle 1 away from the fan 6, and the reverse prevention baffle 2 is hinged to the upper side of the baffle 1, and a sealing assembly is further arranged on the baffle 1, which achieves the effects of preventing the reverse prevention baffle from being closed by the impact gas pressure in the combustion chamber 7 when combustion is poor or deflagration occurs, preventing the flame from flowing back, and preventing the condensed water vapor from flowing back when the wall-hanging stove is not working.
[0034] Specifically, the baffle 1 comprises a baffle 1 main body and a slope structure. The baffle 1 main body is circular or elliptical, and the material can be selected from stainless steel or aluminum alloy, which has good high-temperature resistance and corrosion resistance. The design of the slope structure makes the airflow more smooth when entering the combustion chamber 7, reduces the vortex and resistance, and improves the combustion efficiency. The reverse prevention baffle 2 is made of a metal plate, such as stainless steel or cast iron, which ensures that the reverse prevention baffle 2 can quickly close the channel under the action of gravity.
[0035] Example 2
[0036] The full premix wall-hanging stove gas reverse prevention device provided by the embodiments of the application is different from that of example 1 in that the structures of the baffle 1 and the reverse prevention baffle 2 are different.
[0037] Referring to Figure 2 , the inner side of the baffle 1 is provided with an abutment plate 11, and the abutment plate 11 is fixed with a sealing gasket 12. The sealing gasket 12 can be made of high-temperature-resistant silicone or fluororubber, which has good sealing performance and weather resistance. The baffle 1 and the abutment plate 11 form a clamping groove.
[0038] Referring to Figure 3 and Figure 4The windproof plate 21 is located inside the clamping groove, further improving the sealing effect. The reverse blocking plate 2 is connected to the upper side of the blocking rim 1 through a hinge, and the opening and closing action of the reverse blocking plate 2 is smooth and will not jam after long-term use. The circumferential side of the windproof plate 21 is provided with a sealing groove 211, and when the reverse blocking plate 2 abuts against the blocking rim 1, the sealing gasket 12 is embedded in the sealing groove 211, thereby enhancing the sealing effect and preventing the backflow of smoke and flame.
[0039] The counterweight plate 22 is arranged on the outside of the blocking rim 1 and is hinged to the upper side of the blocking rim 1. The counterweight plate 22 is made of a metal plate, such as stainless steel or cast iron, which ensures that the reverse blocking plate 2 can be quickly closed under the action of gravity. The circumferential side of the counterweight plate 22 extends to the outside of the blocking rim 1, thereby increasing the stability of the reverse blocking plate 2.
[0040] The embodiment further increases the transition chamber 3, one end of which is an air inlet end and is connected to the fan 6, and the blocking rim 1 and the reverse blocking plate 2 are both located in the transition chamber 3. The air outlet end of the transition chamber 3 is also provided with a fire door 4, which is hinged to the transition chamber 3, thereby increasing the safety of the system.
[0041] A connecting rod 5 is arranged between the fire door and the reverse blocking plate 2, one end of the connecting rod 5 is hinged to the reverse blocking plate 2, and the other end is hinged to the fire door, thereby realizing the linkage of the reverse blocking plate 2 and the fire door 4 and improving the reverse prevention effect. The connecting rod 5 can be made of stainless steel or aluminum alloy, which has good strength and corrosion resistance.
[0042] The implementation principle of the embodiment is as follows: in the normal working state, the fan 6 sends the air and gas mixture into the transition chamber 3, and the airflow enters the combustion chamber 7 through the reverse blocking plate 2. When the combustion is poor or deflagration occurs, the high-pressure airflow generated in the combustion chamber 7 closes the reverse blocking plate 2, thereby preventing the backflow of flame. When the wall-hanging stove is not working, the reverse blocking plate 2 falls down by gravity to close the channel, thereby preventing the backflow of condensed water vapor and protecting the gas components in the fan 6 and the combustion chamber 7 from corrosion. Through the above design, the embodiment effectively solves the safety hazard of the traditional reverse prevention device in the case of poor combustion or deflagration, thereby improving the safety and reliability of the wall-hanging stove.
[0043] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application shall be covered within the protection scope of the present application.
Claims
1. A gas anti-reverse device for a fully premix wall-hanging stove, characterized in that: Including the baffle (1) and the anti-reverse baffle (2), the baffle (1) is arranged at the air outlet of the fan (6); The side of the baffle (1) away from the fan (6) is inclined, and the width of the baffle (1) gradually increases from top to bottom, the anti-reverse baffle (2) is located on the side of the baffle (1) away from the fan (6), and the anti-reverse baffle (2) is hinged to the upper side of the baffle (1); The baffle (1) is further provided with a sealing assembly.
2. The full-premixing wall-hung gas boiler gas anti-reverse device according to claim 1, characterized in that: The sealing assembly includes a sealing gasket (12), the inner side of the baffle (1) is provided with an abutting plate (11), the sealing gasket (12) is arranged on the abutting plate (11), and the circumferential side of the anti-reverse baffle (2) is provided with a sealing groove (211), when the anti-reverse baffle (2) abuts against the baffle (1), the sealing gasket (12) is embedded in the sealing groove (211).
3. The full-premixing wall-hanging gas boiler gas anti-reversing device according to claim 2, characterized in that: The anti-reverse baffle (2) includes a windproof plate (21) and a counterweight plate (22), the counterweight plate (22) is arranged on the outer side of the baffle (1) and is hinged to the upper side of the baffle (1), the windproof plate (21) is arranged between the counterweight plate (22) and the abutting plate (11), and the windproof plate (21) is hinged to the baffle (1); the sealing groove (211) is arranged on the side of the windproof plate (21) facing the abutting plate (11).
4. The full-premixing wall-hung gas boiler gas anti-reverse device according to claim 3, characterized in that: The windproof plate (21) is arranged as a rubber plate, and the counterweight plate (22) is arranged as a metal plate.
5. The full-premixing wall-hung gas boiler gas anti-reverse device according to claim 3, characterized in that: The baffle (1) and the abutting plate (11) form a clamping groove, and the windproof plate (21) is located inside the clamping groove.
6. The full-premixing wall-hung gas boiler gas anti-reverse device according to claim 5, characterized in that: The circumferential side of the counterweight plate (22) extends to the outer side of the baffle (1).
7. The full-premixing wall-hanging gas boiler gas anti-reversing device according to claim 3, characterized in that: Further comprising a transition chamber (3), one end of the transition chamber (3) is an air inlet end and is connected with the fan (6), the baffle (1) and the anti-reverse baffle (2) are located in the transition chamber (3), and the other end is an air outlet end and is provided with a fireproof door (4), the fireproof door (4) is hinged to the transition chamber (3).
8. The full-premixing wall-hung gas boiler gas anti-reverse device according to claim 7, characterized in that: The fireproof door (4) and the anti-reverse baffle (2) are provided with a connecting rod (5), one end of the connecting rod (5) is hinged to the anti-reverse baffle (2), and the other end is hinged to the fireproof door (4).