Condensation type energy-saving gas-fired boiler

Abstract

The invention discloses a condensation type energy-saving gas-fired boiler, and particularly relates to the field of gas-fired boilers, the gas-fired boiler comprises a support, a boiler barrel is fixedly connected to the support, a burner is fixedly connected to the bottom of the outer end of the boiler barrel, and a boiler furnace is fixedly connected to the end, close to the burner, of the bottom of the inner side of the boiler barrel; fuel and air are mixed by the combustor, so that the fuel and the air are combusted in the furnace pipe; the end, away from the combustor, of the boiler furnace communicates with a smoke return area, the end, close to the combustor, of the support is provided with a front smoke chamber, the end, away from the combustor, of the support is provided with a rear smoke chamber, and a plurality of second return smoke pipes are arranged between the smoke return area and the front smoke chamber. The temperature difference between high-temperature flue gas and water can be increased by arranging the second return smoke pipe in the lower isolation barrel, so that the heat exchange efficiency is higher, the flue gas is further cooled by arranging the third return smoke pipe in the lower isolation barrel, the speed of condensing water vapor in the flue gas into water can be increased, and the heat exchange efficiency is improved. Therefore, the recovery efficiency of latent heat in flue gas is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of gas boilers, and more particularly to a condensing energy-saving gas boiler. Background Art

[0002] A condensing gas-fired boiler is a highly efficient and energy-efficient modern gas-fired boiler that significantly improves thermal efficiency by recovering wasted heat from the boiler's exhaust gases. Combustion of natural gas produces high-temperature flue gases. A condensing gas-fired boiler uses a condensing heat exchanger to recover sensible heat and condenses water vapor from the boiler's exhaust gases to recover latent heat, significantly improving the boiler's thermal efficiency.

[0003] The heat recovery of existing condensing energy-saving gas boilers mainly includes the second return smoke pipe and the third return smoke pipe. The high-temperature flue gas flows in the second and third return smoke pipes and exchanges heat with the soft water outside the pipe to achieve the purpose of heat exchange.

[0004] However, the temperature of the soft water in the boiler is relatively high, generally around 85°C, and during the heat exchange process, the temperature difference between the flue gas and the soft water becomes smaller and smaller, resulting in lower and lower heat exchange efficiency, making it difficult to improve the thermal efficiency of the boiler. Summary of the Invention

[0005] The present invention provides a condensing energy-saving gas boiler to solve the problem that the temperature difference between flue gas and soft water becomes smaller and smaller during the heat exchange process, resulting in lower and lower heat exchange efficiency.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a condensing energy-saving gas boiler, comprising a bracket, a boiler drum is fixedly connected to the bracket, a burner is fixedly connected to the bottom of the outer end of the boiler drum, a furnace is fixedly connected to the end of the inner bottom of the boiler drum close to the burner, the burner mixes fuel with air and burns it inside the furnace drum; a smoke return zone is connected to the end of the furnace drum away from the burner, a front smoke chamber is provided at the end of the bracket close to the burner, a rear smoke chamber is provided at the end of the bracket away from the burner, a plurality of second return smoke pipes are provided between the smoke return zone and the front smoke chamber, and the second return smoke pipes are provided. The return smoke area and the front smoke chamber are connected, and multiple third return smoke pipes are arranged between the front smoke chamber and the rear smoke chamber, and the third return smoke pipe connects the front smoke chamber and the rear smoke chamber; a lower insulating tube and an upper insulating tube are arranged inside the bracket, and the two ends of the lower insulating tube are fixedly connected to the return smoke area and the front smoke chamber respectively, and the second return smoke pipe is located inside the lower insulating tube, and the two ends of the upper insulating tube are fixedly connected to the front smoke chamber and the rear smoke chamber respectively, and the third return smoke pipe is located inside the upper insulating tube, and the condensed water enters the interior of the lower insulating tube and the upper insulating tube and enters the interior of the boiler drum through the interior of the lower insulating tube and the upper insulating tube.

[0007] In a preferred embodiment, a water inlet pump and a water outlet pump are installed on the bracket, the water outlet end of the water inlet pump is connected to the lower isolation tube and the upper isolation tube respectively, and the water inlet end of the water outlet pump is connected to the interior of the boiler drum.

[0008] In a preferred embodiment, the side of the lower insulating tube away from the front smoke chamber is fixedly connected to a return water pipe 1, the upper end of which extends to the upper side of the inside of the boiler drum, and the side of the upper insulating tube away from the rear smoke chamber is fixedly connected to a return water pipe 2, the upper end of which extends to the upper side of the inside of the boiler drum.

[0009] In a preferred embodiment, water inlets are provided inside the front smoke chamber and the rear smoke chamber. The water inlets are flat structures and are arranged horizontally. One end of the two water inlets is connected to the interior of the lower isolation tube and the upper isolation tube respectively, and the other end of the two water inlets is connected to the water outlet end of the water inlet pump.

[0010] In a preferred embodiment, cleaning nets are provided on both the upper and lower sides of the water inlet, and a driving device is provided at one end of the cleaning net, which is used to drive the two cleaning nets to slide on the upper and lower surfaces of the water inlet respectively.

[0011] In a preferred embodiment, the driving device includes a fixed plate, a movable plate is arranged above the fixed plate, a cylinder is arranged above the movable plate, the fixed plate and the cylinder are fixedly connected to the boiler drum, a connecting rod 1 is hinged on the fixed plate, the upper end of the connecting rod 1 is hinged to the connecting rod 2, the lower end of the connecting rod 2 is hinged to the movable plate, the output end of the cylinder is hinged to the connecting rod 3, the lower end of the connecting rod 3 is hinged to the connecting rod 4, and the upper end of the connecting rod 4 is hinged to the movable plate.

[0012] In a preferred embodiment, a slide groove is horizontally opened on the movable plate, and a movable shaft is provided inside the slide groove. The two ends of the movable shaft are respectively hinged to the connecting rod one and the connecting rod three, so that the connecting rod one, the connecting rod two, the connecting rod three, and the connecting rod four form a parallelogram structure.

[0013] In a preferred embodiment, an elastic device is provided at one end of the movable plate, and the elastic device includes a fixed rod fixedly connected to one end of the movable plate and vertically arranged, and two movable blocks are movably sleeved on the fixed rod, and the two movable blocks are respectively arranged at the upper surface and lower surface of the movable plate, and a spring is sleeved on the fixed rod, and the two ends of the spring are respectively pressed against the end of the fixed rod and the surface of the movable block, and the two cleaning nets are respectively fixedly connected to the two movable blocks.

[0014] In a preferred embodiment, a fixed block is provided at one end of the two cleaning nets away from the driving device, and the fixed block is vertically slidably connected to the ends of the two cleaning nets. A vertical rod is fixedly connected to the fixed block, and a horizontal rod is fixedly connected to the inside of the bracket, and the vertical rod is slidably sleeved on the horizontal rod.

[0015] In a preferred embodiment, a pipe outlet is fixedly connected to the upper side of one end of the bracket, and the pipe outlet is communicated with the rear smoke chamber.

[0016] The technical effects and advantages of the present invention are as follows: By arranging the second return smoke pipe in the lower insulating tube, the present invention can increase the temperature difference between the high-temperature flue gas and water, thereby improving the heat exchange efficiency. By arranging the third return smoke pipe in the lower insulating tube, the flue gas is further cooled, thereby increasing the speed at which water vapor in the flue gas condenses into water, thereby improving the recovery efficiency of the latent heat in the flue gas and achieving energy-saving effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the local structure of the present invention.

[0019] Figure 3 For the present invention Figure 2 sectional view of .

[0020] Figure 4 For the present invention Figure 2 Schematic diagram of the internal structure Figure 1 .

[0021] Figure 5 For the present invention Figure 4 Exploded diagram.

[0022] Figure 6 For the present invention Figure 2 Schematic diagram of the internal structure Figure 2 .

[0023] Figure 7 Schematic diagram of the structure of the drive device of the present invention Figure 1 .

[0024] Figure 8 Schematic diagram of the structure of the drive device of the present invention Figure 2 .

[0025] Figure 9 For the present invention Figure 8 A magnified view of the local structure at point A.

[0026] The accompanying drawings are marked as follows: 1. bracket; 2. boiler drum; 21. return smoke area; 22. front smoke chamber; 23. rear smoke chamber; 231. pipe outlet; 3. burner; 31. furnace hearth; 4. second return smoke pipe; 41. lower insulating cylinder; 42. return water pipe one; 5. third return smoke pipe; 51. upper insulating cylinder; 52. return water pipe two; 6. water inlet pump; 61. water outlet pump; 7. water inlet part; 8. cleaning net; 9. driving device; 91. fixed plate; 92. movable plate; 921. slide; 93. cylinder; 94. connecting rod one; 95. connecting rod two; 96. connecting rod three; 97. connecting rod four; 98. movable shaft; 100. elastic device; 101. movable block; 102. fixed rod; 103. spring; 110. fixed block; 111. vertical rod; 112. horizontal rod. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Refer to the instruction manual Figure 1-Figure 5 , a condensing energy-saving gas boiler includes a bracket 1, a boiler drum 2 is fixedly connected to the bracket 1, a burner 3 is fixedly connected to the bottom of the outer end of the boiler drum 2, and a furnace 31 is fixedly connected to the end of the inner bottom of the boiler drum 2 close to the burner 3. The burner 3 mixes fuel and air and burns them inside the furnace 31; the end of the furnace 31 away from the burner 3 is connected to the return smoke area 21, and the end of the bracket 1 close to the burner 3 is provided with a front smoke chamber 22, and the end of the bracket 1 away from the burner 3 is provided with a rear smoke chamber 23. A plurality of second return smoke pipes 4 are provided between the return smoke area 21 and the front smoke chamber 22. The second return smoke pipes 4 connect the return smoke area 21 and the front smoke chamber 22. A plurality of third return smoke pipes 5 are arranged between the front smoke chamber 22 and the rear smoke chamber 23, and the third return smoke pipe 5 connects the front smoke chamber 22 and the rear smoke chamber 23; a lower insulating tube 41 and an upper insulating tube 51 are arranged inside the bracket 1, and the two ends of the lower insulating tube 41 are fixedly connected to the return smoke area 21 and the front smoke chamber 22 respectively, and the second return smoke pipe 4 is located inside the lower insulating tube 41, and the two ends of the upper insulating tube 51 are fixedly connected to the front smoke chamber 22 and the rear smoke chamber 23 respectively, and the third return smoke pipe 5 is located inside the upper insulating tube 51, and the condensed water enters the interior of the lower insulating tube 41 and the upper insulating tube 51 and enters the interior of the boiler drum 2 through the interior of the lower insulating tube 41 and the upper insulating tube 51.

[0029] Further, if Figure 1As shown, a water inlet pump 6 and a water outlet pump 61 are installed on the bracket 1. The water outlet end of the water inlet pump 6 is connected to the lower insulating tube 41 and the upper insulating tube 51 respectively, and the water inlet end of the water outlet pump 61 is connected to the interior of the boiler drum 2.

[0030] It should be noted that the water inlet pump 6 can deliver condensed water into the lower insulation tube 41 and the upper insulation tube 51, while the water outlet pump 61 can deliver the heated water in the boiler drum 2 for use, such as domestic water for residents.

[0031] Further, if Figure 4 and Figure 5 As shown, the side of the lower insulating tube 41 away from the front smoke chamber 22 is fixedly connected to a return water pipe 42, and the upper end of the return water pipe 42 extends to the upper side of the inside of the boiler drum 2. The side of the upper insulating tube 51 away from the rear smoke chamber 23 is fixedly connected to a return water pipe 52, and the upper end of the return water pipe 52 extends to the upper side of the inside of the boiler drum 2.

[0032] It should be noted that the water in the lower insulating tube 41 enters the interior of the boiler drum 2 through the return pipe 1 42 , and the water in the upper insulating tube 51 enters the interior of the boiler drum 2 through the return pipe 2 52 .

[0033] Further, if Figure 3 As shown, a pipe outlet 231 is fixedly connected to the upper side of one end of the bracket 1 , and the pipe outlet 231 is communicated with the rear smoke chamber 23 .

[0034] In this embodiment, the specific implementation is as follows: During use, softened water is delivered to the interiors of the lower and upper insulating tubes 41, 51 via the water inlet pump 6. It then enters the interior of the boiler drum 2 through the return pipe 1 42 and the return pipe 2 52, respectively. The burner 3 mixes fuel with air and burns it within the furnace 31. The flame and flue gas directly heat the furnace 31, which then transfers heat to the water within the boiler drum 2. The flue gas from the return smoke zone 21 passes sequentially through the second return smoke duct 4, the front smoke chamber 22, the third return smoke duct 5, and the rear smoke chamber 23 before being discharged from the outlet 231. While passing through the second return smoke duct 4, the flue gas is cooled by the water within the lower insulating tube 41. While passing through the third return smoke duct 5, the flue gas is cooled by the water within the upper insulating tube 51.

[0035] In the prior art, the second and third return flue pipes 4, 5 directly contact the water in the boiler drum 2. That is, the water in the boiler drum 2 is directly heated to the set temperature by the furnace 31 and the second and third return flue pipes 4, 5. In this gas-fired boiler, however, only the furnace 31 directly heats the water inside the boiler drum 2. The heated water in the lower and upper insulating tubes 41, 51 flows into the boiler drum 2, where it is further heated, ultimately reaching the set temperature. In the prior art, the flue gas inside the second return smoke pipe 4 is heat-conducted with the water in the boiler drum 2 through the lower insulating tube 41, and the temperature difference between the flue gas and the water is t. In the present technical solution, the temperature difference between the flue gas inside the second return smoke pipe 4 and the water inside the lower insulating tube 41 is T. Obviously, T>t. Therefore, in the present technical solution, the heat exchange efficiency is higher when the flue gas exchanges heat in the second return smoke pipe 4. When the flue gas flows through the third return smoke pipe 5, it is further cooled by the water in the upper insulating tube 51. Therefore, compared with the prior art, the flue gas temperature of the present technical solution is reduced to a greater extent.

[0036] The technical solution of this embodiment can increase the temperature difference between the high-temperature flue gas and water by arranging the second return flue pipe 4 in the lower insulating tube 41, thereby improving the heat exchange efficiency. By arranging the third return flue pipe 5 in the lower insulating tube 41, the flue gas is further cooled, thereby increasing the speed at which water vapor in the flue gas condenses into water, thereby improving the recovery efficiency of the latent heat in the flue gas.

[0037] It should be noted that in order to further improve the heat recovery efficiency, a thermal insulation interlayer can be set in the lower insulating tube 41 and the upper insulating tube 51 to prevent the water in the boiler drum 2 from exchanging heat with the water in the lower insulating tube 41 and the upper insulating tube 51, so as to increase the temperature difference between the water and the flue gas.

[0038] Refer to the instruction manual Figures 1-9 As another embodiment, this embodiment is provided with a water inlet member 7 on the basis of the above embodiment. The front smoke chamber 22 and the rear smoke chamber 23 are both provided with a water inlet member 7. The water inlet member 7 is a flat structure and is arranged horizontally. One end of the two water inlet members 7 is respectively connected to the interior of the lower isolation tube 41 and the upper isolation tube 51, and the other end of the two water inlet members 7 is connected to the water outlet end of the water inlet pump 6.

[0039] It should be noted that the flue gas discharged from the second return smoke pipe 4 into the front smoke chamber 22 or the flue gas discharged from the third return smoke pipe 5 into the rear smoke chamber 23 will flow upward from the bottom of the water inlet 7 and impact the lower surface of the water inlet 7. There is water flowing inside the water inlet 7, and the water inlet 7 is a flat structure. The flue gas will exchange heat with the water inside the water inlet 7, thereby improving the heat exchange efficiency. Condensate outlets are provided at the bottom of the front smoke chamber 22 and the rear smoke chamber 23, and the generated condensed water flows out from the condensed water outlets.

[0040] Further, if Figure 6As shown, cleaning nets 8 are provided on the upper and lower sides of the water inlet part 7, and a driving device 9 is provided at one end of the cleaning nets 8. The driving device 9 is used to drive the two cleaning nets 8 to slide on the upper and lower surfaces of the water inlet part 7 respectively.

[0041] It should be noted that the flue gas contains combustion impurities, which will adhere to the surface of the water inlet 7 and affect the heat exchange efficiency. Therefore, the cleaning net 8 is driven by the driving device 9 to slide on the upper and lower surfaces of the water inlet 7 to scrape off the impurities.

[0042] Specifically, if Figure 7-Figure 9 As shown, the driving device 9 includes a fixed plate 91, a movable plate 92 is provided above the fixed plate 91, and a cylinder 93 is provided above the movable plate 92. The fixed plate 91 and the cylinder 93 are both fixedly connected to the boiler drum 2. A connecting rod 1 94 is hinged on the fixed plate 91, the upper end of the connecting rod 1 94 is hinged to a connecting rod 2 95, and the lower end of the connecting rod 2 95 is hinged to the movable plate 92. The output end of the cylinder 93 is hinged to a connecting rod 3 96, the lower end of the connecting rod 3 96 is hinged to a connecting rod 4 97, and the upper end of the connecting rod 4 97 is hinged to the movable plate 92.

[0043] Furthermore, a sliding groove 921 is horizontally opened on the movable plate 92, and a movable shaft 98 is arranged inside the sliding groove 921. The two ends of the movable shaft 98 are respectively hinged to the connecting rod 1 94 and the connecting rod 3 96, so that the connecting rod 1 94, the connecting rod 2 95, the connecting rod 3 96, and the connecting rod 4 97 form a parallelogram structure.

[0044] Furthermore, an elastic device 100 is provided at one end of the movable plate 92, and the elastic device 100 includes a fixed rod 102 fixedly connected to one end of the movable plate 92 and vertically arranged, and two movable blocks 101 are movably sleeved on the fixed rod 102, and the two movable blocks 101 are respectively arranged at the upper surface and lower surface of the movable plate 92, and a spring 103 is sleeved on the fixed rod 102, and the two ends of the spring 103 are respectively pressed against the end of the fixed rod 102 and the surface of the movable block 101, and the two cleaning nets 8 are respectively fixedly connected to the two movable blocks 101.

[0045] In the above technical solution, the cleaning net 8 is made of stainless steel by welding.

[0046] In this embodiment, the specific implementation is as follows: the drive device 9 operates at intervals. During operation, the cylinder 93 drives the upper end of the third connecting rod 96 to move up and down. When the cylinder 93 drives the upper end of the third connecting rod 96 downward, the third connecting rod 96 drives the fourth connecting rod 97 to extend toward the side closer to the water inlet 7, thereby driving the movable plate 92 toward the water inlet 7. At this time, the movable shaft 98 slides within the chute 921, and the second connecting rod 95 and the first connecting rod 94 also move with it. When the cylinder 93 drives the upper end of the movable shaft 98 upward, the third connecting rod 96 pulls the movable plate 92 back away from the water inlet 7 through the fourth connecting rod 97. During this operation, when the movable plate 92 moves toward the water inlet 7, it drives the cleaning net 8 in a diagonally downward direction, causing the upper cleaning net 8 to slide on the upper surface of the water inlet 7. During this process, the movable block 101 compresses the spring 103 to act as a buffer. When the movable plate 92 moves away from the water inlet 7, the movable plate 92 drives the cleaning net 8 to move obliquely upward, so that the cleaning net 8 below slides on the lower surface of the water inlet 7. During this process, the movable block 101 compresses the spring 103 to play a buffering role.

[0047] The above technical solution is to set up a cleaning net 8 and a driving device 9, and the cleaning net 8 can be driven to slide on the upper and lower surfaces of the water inlet part 7, so that impurities on the surface of the water inlet part 7 can be scraped off. During the heat exchange process, the condensed water generated will drip upward onto the cleaning net 8 below, which can wash away the impurities. Condensed water will also be generated on the upper surface of the water inlet part 7. When the cleaning net 8 scrapes off the impurities, the condensed water can play a cleaning role.

[0048] Furthermore, a fixed block 110 is provided at one end of the two cleaning nets 8 away from the driving device 9, and the fixed block 110 is vertically slidably connected to the ends of the two cleaning nets 8. A vertical rod 111 is fixedly connected to the fixed block 110, and a horizontal rod 112 is fixedly connected to the inside of the bracket 1, and the vertical rod 111 is slidably sleeved on the horizontal rod 112.

[0049] It should be noted that when the cleaning net 8 moves obliquely, the fixed block 110 and the vertical rod 111 slide on the horizontal rod 112, and the cleaning net 8 slides vertically on the fixed block 110. The setting of the fixed block 110, the vertical rod 111 and the horizontal rod 112 can improve the stability of the cleaning net 8.

[0050] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A condensing energy-saving gas boiler, characterized by: The invention comprises a bracket (1), a boiler drum (2) is fixedly connected to the bracket (1), a burner (3) is fixedly connected to the bottom of the outer end of the boiler drum (2), and a furnace (31) is fixedly connected to the end of the inner bottom of the boiler drum (2) close to the burner (3), and the burner (3) mixes fuel with air so that the fuel is burned inside the furnace (31); The end of the furnace (31) away from the burner (3) is connected to a smoke return zone (21); the end of the bracket (1) close to the burner (3) is provided with a front smoke chamber (22); the end of the bracket (1) away from the burner (3) is provided with a rear smoke chamber (23); a plurality of second return smoke pipes (4) are provided between the smoke return zone (21) and the front smoke chamber (22); the second return smoke pipes (4) connect the smoke return zone (21) and the front smoke chamber (22); a plurality of third return smoke pipes (5) are provided between the front smoke chamber (22) and the rear smoke chamber (23); the third return smoke pipes (5) connect the front smoke chamber (22) and the rear smoke chamber (23); A lower insulating tube (41) and an upper insulating tube (51) are provided inside the bracket (1); the two ends of the lower insulating tube (41) are fixedly connected to the smoke return zone (21) and the front smoke chamber (22), respectively, and the second return smoke pipe (4) is located inside the lower insulating tube (41); the two ends of the upper insulating tube (51) are fixedly connected to the front smoke chamber (22) and the rear smoke chamber (23), respectively, and the third return smoke pipe (5) is located inside the upper insulating tube (51); condensed water enters the interior of the lower insulating tube (41) and the upper insulating tube (51) and enters the interior of the boiler drum (2) through the interior of the lower insulating tube (41) and the upper insulating tube (51).

2. A condensing energy-saving gas boiler according to claim 1, characterized in that: A water inlet pump (6) and a water outlet pump (61) are installed on the bracket (1); the water outlet end of the water inlet pump (6) is communicated with the lower insulating cylinder (41) and the upper insulating cylinder (51) respectively; and the water inlet end of the water outlet pump (61) is communicated with the interior of the boiler drum (2).

3. A condensing energy-saving gas boiler according to claim 1, characterized in that: The side of the lower insulating tube (41) away from the front smoke chamber (22) is fixedly connected to a return water pipe (42), and the upper end of the return water pipe (42) extends to the upper side of the interior of the boiler drum (2). The side of the upper insulating tube (51) away from the rear smoke chamber (23) is fixedly connected to a return water pipe (52), and the upper end of the return water pipe (52) extends to the upper side of the interior of the boiler drum (2).

4. A condensing energy-saving gas boiler according to claim 2, characterized in that: A water inlet member (7) is provided inside the front smoke chamber (22) and the rear smoke chamber (23). The water inlet member (7) is a flat structure and is arranged horizontally. One end of the two water inlet members (7) is respectively connected to the interior of the lower insulating cylinder (41) and the upper insulating cylinder (51), and the other end of the two water inlet members (7) is connected to the water outlet end of the water inlet pump (6).

5. A condensing energy-saving gas boiler according to claim 4, characterized in that: Cleaning nets (8) are provided on both upper and lower sides of the water inlet member (7), and a driving device (9) is provided at one end of the cleaning nets (8). The driving device (9) is used to drive the two cleaning nets (8) to slide on the upper surface and the lower surface of the water inlet member (7) respectively.

6. A condensing energy-saving gas boiler according to claim 5, characterized in that: The driving device (9) includes a fixed plate (91), a movable plate (92) is arranged above the fixed plate (91), a cylinder (93) is arranged above the movable plate (92), the fixed plate (91) and the cylinder (93) are both fixedly connected to the drum (2), a connecting rod 1 (94) is hinged on the fixed plate (91), the upper end of the connecting rod 1 (94) is hinged to a connecting rod 2 (95), the lower end of the connecting rod 2 (95) is hinged to the movable plate (92), the output end of the cylinder (93) is hinged to a connecting rod 3 (96), the lower end of the connecting rod 3 (96) is hinged to a connecting rod 4 (97), and the upper end of the connecting rod 4 (97) is hinged to the movable plate (92).

7. A condensing energy-saving gas boiler according to claim 6, characterized in that: A sliding groove (921) is horizontally provided on the movable plate (92), and a movable shaft (98) is provided inside the sliding groove (921). The two ends of the movable shaft (98) are respectively hinged to the connecting rod 1 (94) and the connecting rod 3 (96), so that the connecting rod 1 (94), the connecting rod 2 (95), the connecting rod 3 (96), and the connecting rod 4 (97) form a parallelogram structure.

8. The condensing energy-saving gas boiler according to claim 7, characterized in that: An elastic device (100) is provided at one end of the movable plate (92), and the elastic device (100) includes a fixed rod (102) fixedly connected to one end of the movable plate (92) and arranged vertically, and two movable blocks (101) are movably sleeved on the fixed rod (102), and the two movable blocks (101) are respectively arranged at the positions of the upper surface and the lower surface of the movable plate (92), and a spring (103) is sleeved on the fixed rod (102), and the two ends of the spring (103) are respectively pressed against the end of the fixed rod (102) and the surface of the movable block (101), and the two cleaning nets (8) are respectively fixedly connected to the two movable blocks (101).

9. The condensing energy-saving gas boiler according to claim 8, characterized in that: A fixed block (110) is provided at one end of the two cleaning nets (8) away from the driving device (9), and the fixed block (110) is vertically slidably connected to the ends of the two cleaning nets (8). A vertical rod (111) is fixedly connected to the fixed block (110), and a horizontal rod (112) is fixedly connected to the interior of the bracket (1), and the vertical rod (111) is slidably sleeved on the horizontal rod (112).

10. The condensing energy-saving gas boiler according to claim 1, characterized in that: A pipe outlet (231) is fixedly connected to the upper side of one end of the bracket (1), and the pipe outlet (231) is communicated with the rear smoke chamber (23).

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