A gas wall-mounted boiler heat exchanger

Abstract

The present invention relates to the technical field of gas wall-mounted boiler heat exchangers, and in particular to a gas wall-mounted boiler heat exchanger, comprising a heat exchanger body, a water outlet pipe and a water inlet pipe being arranged on the heat exchanger body, the water inlet end of the water inlet pipe being fixedly connected to a second pipe, the right inner wall of the first pipe being fixedly connected to the bottom surface of the left end of a blocking rod, the bottom surface of the right end of the blocking rod being fixedly connected to the left inner wall of the second pipe, the blocking rod passing through a partition and being fixedly connected to the partition, and the outer wall of one adjacent end of the first pipe and the second pipe being rotatably connected to a third pipe, and an array filter mechanism being arranged on the outside of the third pipe. The present invention is simple to operate and convenient to use, and can filter the water source entering the heat exchanger pipe, and can disassemble and clean and replace the filter mechanism without stopping the operation of the heat exchanger body, thereby avoiding the accumulation of scale in the heat exchanger pipe and ensuring the normal use of the heat exchanger pipe.

Description

Technical Field

[0001] The invention relates to the technical field of gas wall-mounted boiler heat exchangers, and in particular to a gas wall-mounted boiler heat exchanger. Background Art

[0002] With the rapid development of social economy, the use of household instantaneous gas water heaters is becoming more and more common. At the same time, with the increasing tension of global energy, the development of efficient, energy-saving and environmentally friendly civil fuel appliances is no longer simply to save money for users, but to achieve the sustainable development of the national economy. As the core component of the gas water heater, the heat exchanger's energy utilization rate will largely determine the efficiency of the water heater. Most of the existing gas heating water heaters still use a general finned tube structure heat exchanger, which directly heats the fins through the flame to transfer heat to the heat exchange tube, thereby heating the water in the heat exchange tube.

[0003] However, since tap water usually enters the wall-mounted boiler, and tap water contains more minerals, a large amount of scale often accumulates in the heat exchanger pipe of the wall-mounted boiler after the wall-mounted boiler is used for a long time, thereby affecting the heating effect of the heat exchanger. For this reason, a gas wall-mounted boiler heat exchanger is proposed. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a gas wall-mounted boiler heat exchanger to solve the problems raised in the background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides a gas wall-mounted boiler heat exchanger, including a heat exchanger body, wherein a water outlet pipe and a water inlet pipe are provided on the heat exchanger body, the water inlet end of the water inlet pipe is fixedly connected to the second pipe, the right inner wall of the first pipe is fixedly connected to the bottom surface of the left end of the blocking rod, the bottom surface of the right end of the blocking rod is fixedly connected to the left inner wall of the second pipe, the blocking rod passes through the partition and is fixedly connected to the partition, and the outer wall of the adjacent end of the first pipe and the second pipe is rotatably connected to a third pipe, and an array filtering mechanism is provided on the outside of the third pipe.

[0006] Preferably, the filtering mechanism comprises a first annular block, a protective cover, a filter bucket, a third annular block, a first hose and a second hose, the top of the first annular block is fixedly connected to the bottom of the third pipe, the outer side of the first annular block is threadedly connected to the protective cover, the inner side of the first annular block is provided with a filter bucket, the inner lower end of the first annular block is threadedly connected to the third annular block, the top surface of the third annular block is in contact with the filter bucket, the bottom surface of the third pipe and the top surface of the filter bucket are fixedly installed with a sealing ring, the top surface of the filter bucket is in contact with the sealing ring, the bottom of the third pipe and both sides of the partition are respectively provided with assembly holes at the same level, the first hose and the second hose respectively penetrate the corresponding assembly holes and are fixedly connected to the inner walls of the corresponding assembly holes, the top ends of the first hose and the second hose are both higher than the blocking rod, the bottom end of the first hose extends to the inside of the filter bucket, and the bottom end of the second hose penetrates the bottom end of the filter bucket.

[0007] Preferably, sealing rings are fixedly installed on the inner walls at both ends of the third pipe, and a groove is provided at the center of the inner wall of the third pipe, the groove is matched with the outer side of the partition, and the partition is rotatably connected to the third pipe.

[0008] Preferably, the filter bucket includes a second annular block, filter cotton and a cylinder, the second annular block and the filter cotton are fixedly connected together, the bottom end of the filter cotton is fixedly mounted with a cylinder, the cylinder passes through the filter cotton, and the bottom end of the second hose passes through the cylinder and is interference fit with the inner wall of the cylinder.

[0009] Preferably, flanges are fixedly mounted on the ends of the first pipe and the second pipe that are away from each other, and the water inlet end of the water inlet pipe is fixedly connected to the flange on the second pipe.

[0010] Preferably, a third rotating shaft is rotatably connected to the center position of the bottom wall of the filter bucket, a second groove is opened at the top of the third rotating shaft, a second rotating shaft is rotatably connected in the second groove, a clamping ring is fixedly connected to the bottom end of the second rotating shaft, a fixed block is fixedly connected to the inner wall of the clamping ring, and the top of the second rotating shaft is rotatably connected to the partition.

[0011] Preferably, a first rotating shaft is fixedly connected to the center position of the bottom of the protective cover, a third rotating shaft is rotatably connected to the surface of the first rotating shaft, and a shift block is fixedly connected to the top end of the first rotating shaft.

[0012] Preferably, the third rotating shaft is provided with a third groove near the inner center position of one end of the filter bucket, and a plurality of second fixed columns are fixedly connected to the inner wall of the third groove, and the first rotating shaft is provided with a first groove at the third groove, and a first fixed column is fixedly connected to the inner wall of the first groove near the center position, and the first fixed column is rotatably connected to a shift block, and a second fixed column is fixedly connected to the inner wall of the first groove away from the center, and the first groove and the third groove are at the same height.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the water flowing into the heat exchanger body will first enter the first pipe, and then the water will enter the filter bucket through the first conduit, and then the filtered water source will flow into the second pipe through the second conduit, and then the water will enter the heat exchanger body through the water inlet pipe, and then it will be heated by the heat exchanger body and finally discharged from the water outlet pipe. After being filtered by the filtering mechanism, the heat exchange pipes in the heat exchanger body will not be full of scale even after long-term use. When the filter bucket needs to be cleaned, the third pipe is rotated so that the blocking rod and the hose are at the same level. Under the action of the blocking rod, the first hose and the second hose are both in a bent state, that is, the filtering mechanism is blocked. At this time, the protective cover is unscrewed from the first annular block, and then the third annular block is unscrewed from the first annular block. After that, the filter bucket can be cleaned and replaced, and then the third annular block and the protective cover can be screwed onto the first annular block in turn. The present invention is simple to operate and easy to use, can filter the water source entering the heat exchanger pipe, and can disassemble, clean and replace the filtering mechanism without stopping the operation of the heat exchanger body, thereby avoiding the accumulation of scale in the heat exchanger pipe and ensuring the normal use of the heat exchanger pipe. By arranging the first page and the second page inside the filter bucket, the water filtering effect and the utilization rate of the filter cotton can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 It is a structural schematic diagram of the filtering mechanism of the present invention;

[0016] Figure 3 A combined view of the first rotating shaft and the second rotating shaft of the present invention;

[0017] Figure 4 A combined view of the shift block and the second fixing column of the present invention;

[0018] Figure 5 For the present invention Figure 2 Sectional view in the AA direction;

[0019] Figure 6 Not the present invention Figure 2 Cross-sectional view along the BB direction.

[0020] In the figure: 1. heat exchanger body; 2. water outlet pipe; 3. water inlet pipe; 4. first pipeline; 5. second pipeline; 6. blocking rod; 7. partition; 8. third pipeline; 9. filtering mechanism; 91. first annular block; 92. protective cover; 93. filter bucket; 931. second annular block; 932. filter cotton; 94. third annular block; 95. first hose; 96. second hose; 97. first rotating shaft; 971. dial block; 972. first fixed column; 973. second fixed column; 974. first groove; 98. second rotating shaft; 980. clamping ring; 981. fixed block; 982. first page; 99. third rotating shaft; 990. second groove; 991. third groove; 992. second fixed column; 993. second page. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-Figure 6 The gas wall-mounted boiler heat exchanger comprises a heat exchanger body 1, on which a water outlet pipe 2 and a water inlet pipe 3 are provided, the water inlet end of the water inlet pipe 3 is fixedly connected to the second pipe 5, the right inner wall of the first pipe 4 is fixedly connected to the bottom surface of the left end of the blocking rod 6, the bottom surface of the right end of the blocking rod 6 is fixedly connected to the left inner wall of the second pipe 5, the blocking rod 6 is used to block and connect the filtering mechanism 9, the blocking rod 6 passes through the partition 7 and is fixedly connected to the partition 7, and the outer wall of the adjacent end of the first pipe 4 and the second pipe 5 is rotatably connected with a third pipe 8, the partition 7 is used to separate the third pipe 8 into two left and right parts, and an array filtering mechanism 9 is provided on the outside of the third pipe 8. During operation, the water entering the heat exchanger body 1 first enters the first pipe 4. Since the partition 7 divides the third pipe 8 into two parts, the water can only enter the second pipe 5 through the filtering mechanism 9. Then the water enters the heat exchanger body 1 through the water inlet pipe 3, and is finally discharged from the water outlet pipe 2 after being heated by the heat exchanger body 1. After being filtered by the filtering mechanism 9, the heat exchange pipe in the heat exchanger body 1 will not be full of scale even after long-term use, thereby avoiding the accumulation of scale in the heat exchange pipe and ensuring the normal use of the heat exchanger pipe.

[0023] Specifically, the filtering mechanism 9 includes a first annular block 91, a protective cover 92, a filter bucket 93, a third annular block 94, a first hose 95 and a second hose 96. The top of the first annular block 91 is fixedly connected to the bottom of the third pipe 8. The outer side of the first annular block 91 is threadedly connected with the protective cover 92. The inner side of the first annular block 91 is provided with a filter bucket 93. The inner lower end of the first annular block 91 is threadedly connected with the third annular block 94. The top surface of the third annular block 94 is in contact with the filter bucket 93. The third annular block 94 is used to fix the filter bucket 93. A sealing ring is fixedly installed on the bottom surface of the third pipe 8 and on the top surface of the filter bucket 93. The top surface of the filter bucket 93 is in contact with the sealing ring. The bottom of the third pipe 8 and on both sides of the partition 7 are respectively provided with assembly holes at the same level. The first hose 95 and the second hose 96 respectively penetrate the corresponding assembly holes and are fixedly connected to the inner walls of the corresponding assembly holes. The top heights of the first hose 95 and the second hose 96 are both higher than the blocking rod 6, and the bottom end of the first hose 95 extends to the inside of the filter bucket 93, and the bottom end of the second hose 96 penetrates the bottom end of the filter bucket 93. During operation, the water flow in the first pipe 4 enters the filter bucket 93 through the first hose 95. After the filter bucket 93 filters out the scale in the water flow, the filtered water flows into the second pipe 5 through the second hose 96. When cleaning the scale in the filter bucket 93, first unscrew the protective cover from the first annular block 91, then unscrew the third annular block 94 from the first annular block 91, and finally clean and replace the filter bucket 93, thereby cleaning the scale in the water flow and cleaning and replacing the filter bucket 93.

[0024] Specifically, sealing rings are fixedly installed on the inner walls of the left and right ends of the third pipe 8, and a groove is provided at the center of the inner wall of the third pipe 8, which is matched with the outer side of the partition 7, and the partition 7 is rotatably connected with the third pipe 8. The above design method can ensure the sealing between the pipes on the one hand, and on the other hand, the groove and the partition 7 cooperate to fix the third pipe 8; when the filter bucket 93 needs to be cleaned, the third pipe 8 is rotated to make the blocking rod 6 and the hose at the same level. Under the action of the blocking rod 6, the first hose 95 and the second hose 96 are both in a bent state, that is, the filter mechanism 9 is blocked. At this time, the filter mechanism 9 is disassembled and cleaned, thereby achieving the purpose of disassembling and cleaning the filter mechanism 9 without stopping the operation of the heat exchanger body 1.

[0025] Specifically, the filter bucket 93 includes a second annular block 931, filter cotton 932 and a cylinder. The second annular block 931 and the filter cotton 932 are fixedly connected together. The bottom end of the filter cotton 932 is fixedly installed with a cylinder, which passes through the filter cotton 932. The bottom end of the second hose 96 passes through the cylinder and is interference fit with the inner wall of the cylinder.

[0026] Specifically, flanges are fixedly installed at the ends of the first pipe 4 and the second pipe 5 that are away from each other, and the water inlet end of the water inlet pipe 3 is fixedly connected to the flange on the second pipe 5 .

[0027] Specifically, a third rotating shaft 99 is rotatably connected to the center position of the bottom wall of the filter bucket 93, a second groove 990 is opened at the top of the third rotating shaft 99, a second rotating shaft 98 is rotatably connected in the second groove 990, a clamping ring 980 is fixedly connected to the bottom end of the second rotating shaft 98, a fixed block 981 is fixedly connected to the inner wall of the clamping ring 980, and the top of the second rotating shaft 98 is rotatably connected to the partition 7.

[0028] Specifically, a first rotating shaft 97 is fixedly connected to the center of the bottom of the protective cover 92 , a third rotating shaft 99 is rotatably connected to the surface of the first rotating shaft 97 , and a shifting block 971 is fixedly connected to the top of the first rotating shaft 97 .

[0029] Specifically, the third rotating shaft 99 is provided with a third groove 991 at the inner center position near one end of the filter bucket 93, and a plurality of second fixed columns 992 are fixedly connected to the inner wall of the third groove 991. The first rotating shaft 97 is provided with a first groove 974 at the third groove 991, and a first fixed column 972 is fixedly connected to the inner wall of the first groove 974 near the center position, the first fixed column 972 is rotatably connected to a shift block 971, and a third fixed column 973 is fixedly connected to the inner wall of the first groove 974 away from the center, and the first groove 974 and the third groove 991 are at the same height.

[0030] By adopting the above scheme, since the water inside the filter bucket 93 enters the filter cotton 932 through the first hose 95, and since the first hose 95 is arranged on the left side of the filter bucket 93, during the filtering process, the left side of the filter cotton 932 will fail earlier than the right side because the amount of water filtered is more than that of the right side. By fixing the first rotating shaft 97 at the bottom of the protective cover 92, when the protective cover 92 is rotated counterclockwise, the first rotating shaft 97 can be driven to rotate together. A shift block 971 is arranged at the top of the first rotating shaft 97, and the shift block 971 is arranged at the opening The second groove 990 is arranged at the upper end of the third rotating shaft 99. The inner wall of the second groove 990 is rotatably connected to a clamping ring 980 fixedly connected to the bottom of the second rotating shaft 98. A fixing block 981 is fixedly connected to the side wall of the clamping ring 980 away from the shifting block 971. When the filtering effect of the filter cotton 932 on the left side of the filter bucket 93 is reduced, the protective cover 92 is rotated, and the second rotating shaft 98 is driven to rotate through the cooperation of the shifting block 971 and the fixing block 981, thereby driving the first page 982 fixedly connected to the side wall of the second rotating shaft 98 to rotate around the second rotating shaft 98, so that the filter cotton on the right side is moved. 932 is sent to the left side of the filter bucket, so that the filtering effect of the filter cotton 932 is better. Since the consumption of the filter cotton 932 below is lower than that of the filter cotton 932 above, when the filter cotton 932 above rotates for a period of time, the protective cover 92 rotates clockwise. Since a third groove 991 is opened at the bottom of the third rotating shaft 99 and a plurality of second fixing columns 992 are arranged inside the third groove 991, when the protective cover 92 rotates clockwise with the first rotating shaft 97 fixed on its surface, the first fixing column 972 is hinged to the dial block 971 inside the first groove 974 and the second fixing column 992. 2, since a third fixed column 973 is provided on one side of the shift block 971, when the first rotating shaft 97 rotates counterclockwise, the shift block 971 will not drive the third rotating shaft 99 to rotate. When the first rotating shaft 97 rotates clockwise, the shift block 971 will drive the rotation of the third rotating shaft 99 through the cooperation with the second fixed column 992 under the action of the third fixed column 973. Since it rotates clockwise, the rotation of the first rotating shaft 97 will not drive the rotation of the second rotating shaft 98, thereby driving the second paging 993 fixed on the side wall of the third rotating shaft 99 to rotate, thereby realizing the side change of the filter cotton 932 and increasing the filtering effect.

[0031] Working principle: During operation, the water entering the heat exchanger body 1 first enters the first pipe 4. Since the partition 7 divides the third pipe 8 into two parts, the water can only enter the filter 93 through the first hose 95. After the filter 93 filters out the scale in the water, the filtered water enters the second pipe 5 through the second hose 96, and then enters the heat exchanger body 1 for heating, and finally discharged from the outlet pipe 2.When the filter hopper 93 needs to be cleaned, the third pipe 8 is rotated to make the blocking rod 6 and the first hose 95 and the second hose 96 at the same level. Under the action of the blocking rod 6, the first hose 95 and the second hose 96 are both in a bent state, that is, the filter mechanism 9 is blocked. At this time, the protective cover is unscrewed from the first annular block 91, and then the third annular block 94 is unscrewed from the first annular block 91, so that the filter hopper 93 can be cleaned and replaced, and finally the third annular block 94 and the protective cover 92 are screwed onto the first annular block 91 in turn, thereby realizing the disassembly, cleaning and replacement of the filter mechanism 9 without stopping the operation of the heat exchanger body 1. Since the water inside the filter hopper 93 enters the filter cotton through the first hose 95, due to this The invention arranges the first hose 95 on the left side of the filter bucket. During the filtering process, the left side of the filter cotton 932 filters more water than the right side, so the filter cotton 932 on the left side will fail earlier than the right side. The first rotating shaft 97 is fixedly connected to the bottom of the protective cover 92. When the protective cover 92 is rotated counterclockwise, the first rotating shaft 97 can be driven to rotate together. A shift block 971 is provided on the top of the first rotating shaft 97 and the shift block 971 is arranged inside the second groove 990 opened at the upper end of the third rotating shaft 99. The inner wall of the second groove 990 is rotatably connected to a clamping ring 980 fixedly connected to the bottom of the second rotating shaft 98. A fixed block 981 is fixedly connected to the side wall of the clamping ring 980 away from the shift block 971. When the filter bucket 93 When the filtering effect of the filter cotton 932 on the left side is reduced, the protective cover 92 is rotated, and the second rotating shaft 98 is driven to rotate through the cooperation of the dial block 971 and the fixed block 981, thereby driving the first page 982 fixedly connected to the side wall of the second rotating shaft 98 to rotate around the second rotating shaft 98, thereby sending the filter cotton 932 on the right side to the left side of the filter bucket, so that the filtering effect of the filter cotton 932 is better. Since the consumption of the filter cotton 932 below is lower than that of the filter cotton 932 above, after the filter cotton 932 above rotates for a period of time, the protective cover 92 is rotated clockwise. Since a third groove 991 is provided at the bottom of the third rotating shaft 99 and a plurality of second fixed columns 992 are provided inside the third groove 991, when the protective cover 92 carries the third groove 991 fixed on its surface, the protective cover 92 is rotated clockwise. When the first rotating shaft 97 rotates clockwise, the first fixed column 972 is hinged to the first groove 974 by the cooperation of the second fixed column 992. Since the third fixed column 973 is provided on one side of the dial block 971, when the first rotating shaft 97 rotates counterclockwise, the dial block 971 will not drive the third rotating shaft 99 to rotate. When the first rotating shaft 97 rotates clockwise, the dial block 971 will drive the third rotating shaft 99 to rotate under the action of the third fixed column 973 and the cooperation with the second fixed column 992. Since it rotates clockwise, the rotation of the first rotating shaft 97 will not drive the rotation of the second rotating shaft 98, thereby driving the second page 993 fixed on the side wall of the third rotating shaft 99 to rotate, realizing the side change of the filter cotton 932 and increasing the filtering effect. ;

[0032] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A gas wall-mounted boiler heat exchanger, comprising a heat exchanger body (1), characterized in that: The heat exchanger body (1) is provided with a water outlet pipe (2) and a water inlet pipe (3); the water inlet end of the water inlet pipe (3) is fixedly connected to the second pipe (5); the right inner wall of the first pipe (4) is fixedly connected to the left bottom surface of the blocking rod (6); the right bottom surface of the blocking rod (6) is fixedly connected to the left inner wall of the second pipe (5); the blocking rod (6) penetrates the partition (7) and is fixedly connected to the partition (7); and the outer walls of adjacent ends of the first pipe (4) and the second pipe (5) are rotatably connected to a third pipe (8); and an array filter mechanism (9) is provided on the outside of the third pipe (8); The filtering mechanism (9) comprises a first annular block (91), a protective cover (92), a filter bucket (93), a third annular block (94), a first hose (95) and a second hose (96); the top of the first annular block (91) is fixedly connected to the bottom of the third pipe (8); the outer side of the first annular block (91) is threadedly connected to the protective cover (92); the inner side of the first annular block (91) is provided with a filter bucket (93); the lower end of the inner side of the first annular block (91) is threadedly connected to the third annular block (94); the top surface of the third annular block (94) is in contact with the filter bucket (93); the bottom surface of the third pipe (8) is A sealing ring is fixedly installed on the top surface of the filter bucket (93), and the top surface of the filter bucket (93) contacts the sealing ring. Assembly holes at the same level are respectively opened at the bottom of the third pipe (8) and on both sides of the partition (7). The first hose (95) and the second hose (96) respectively penetrate the corresponding assembly holes and are fixedly connected to the inner walls of the corresponding assembly holes. The top ends of the first hose (95) and the second hose (96) are higher than the blocking rod (6), and the bottom ends of the first hose (95) extend into the interior of the filter bucket (93), and the bottom ends of the second hose (96) penetrate the bottom end of the filter bucket (93); Sealing rings are fixedly installed on the inner walls of both ends of the third pipe (8), and a groove is provided at the center of the inner wall of the third pipe (8), the groove is matched with the outer side of the partition (7), and the partition (7) is rotatably connected to the third pipe (8); The bottom wall center of the filter bucket (93) is rotatably connected to a third rotating shaft (99); the side wall of the third rotating shaft (99) is fixedly connected to a second page (993); filter cotton (932) is arranged around the second page (993); a second groove (990) is provided at the top of the third rotating shaft (99); a second rotating shaft (98) is rotatably connected in the second groove (990); a first page (982) is fixedly connected to the side wall of the second rotating shaft (98); filter cotton (932) is arranged around the first page (982); a clamping ring (980) is fixedly connected to the bottom end of the second rotating shaft (98); a fixing block (981) is fixedly connected to the inner wall of the clamping ring (980); and the top of the second rotating shaft (98) is rotatably connected to the partition (7); A first rotating shaft (97) is fixedly connected to the center of the bottom of the protective cover (92); a third rotating shaft (99) is rotatably connected to the surface of the first rotating shaft (97); and a shifting block (971) is fixedly connected to the top of the first rotating shaft (97); The third rotating shaft (99) is provided with a third groove (991) at a central position of an inner portion of one end of the filter bucket (93); a plurality of second fixing columns (992) are fixedly connected to the inner wall of the third groove (991); the first rotating shaft (97) is provided with a first groove (974) at the third groove (991); a first fixing column (972) is fixedly connected to the inner wall of the first groove (974) near the central position; a shifting block (971) is rotatably connected to the first fixing column (972); a second fixing column (973) is fixedly connected to the inner wall of the first groove (974) away from the central position; and the first groove (974) and the third groove (991) are at the same height.

2. A gas wall-mounted boiler heat exchanger according to claim 1, characterized in that: The filter bucket (93) comprises a second annular block (931), filter cotton (932) and a cylinder. The second annular block (931) and the filter cotton (932) are fixedly connected together. The bottom end of the filter cotton (932) is fixedly mounted with a cylinder, which passes through the filter cotton (932). The bottom end of the second hose (96) passes through the cylinder and is interference fit with the inner wall of the cylinder.

3. A gas wall-mounted boiler heat exchanger according to claim 1, characterized in that: The ends of the first pipe (4) and the second pipe (5) that are away from each other are both fixedly mounted with flanges, and the water inlet end of the water inlet pipe (3) is fixedly connected to the flange on the second pipe (5).

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