Efficient heat exchanger for water heater and control method of efficient heat exchanger

Abstract

The invention discloses an efficient heat exchanger for a water heater and a control method of the efficient heat exchanger, and relates to the technical field of fuel gas rapid water heaters, the efficient heat exchanger comprises a heat exchange chamber and further comprises a descaling device and an overhauling device, a combustion chamber is fixedly installed on the surface of the heat exchange chamber, and a water outlet device is fixedly installed on the surface of the heat exchange chamber; the combustion chamber communicates with the interior of the heat exchange chamber through a pipeline, the descaling device comprises an electromagnetic valve, a filter frame, a rotating rod, rotating blades, a protruding block, an elastic piece and an L-shaped rod, the rotating blades rotate to drive the rotating rod to rotate, the rotating rod rotates to drive the protruding block to rotate, the protruding block rotates to make contact friction with the elastic piece to generate vibration, and the elastic piece vibrates to drive the filter frame to resonate together; the filtering frame and the elastic piece resonate to remove scale at a water inlet point, the water flow speed is increased, so that scale is not prone to being formed on the surface of a heat exchanger pipeline or a plate piece, a scale heat insulation layer hindering heat transfer is eliminated, and therefore the heat exchange efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of gas instantaneous water heaters, and specifically relates to an efficient heat exchanger for a water heater and a control method therefor. Background Art

[0002] An efficient heat exchanger for a water heater usually consists of parts such as heat exchange pipes, a housing, end covers, and an insulating layer, and the heat exchanger pipes of a gas instantaneous water heater are arranged in a curved shape.

[0003] The patent with the patent publication number CN209341875U relates to an efficient heat exchanger for a water heater, including a water inlet pipe, a water outlet pipe connected to a heat exchange coil, and the heat exchange part of the heat exchange coil is located in a heating chamber; a number of heat exchange fins are evenly distributed along the length direction on each of the number of heat exchange parts, and the heat exchange fins are all arranged perpendicular to the length direction of the number of heat exchange parts; water pipe holes corresponding to the number of heat exchange parts are provided on each of the heat exchange fins; and on each heat exchange fin, between every two adjacent water pipe holes, and between the water pipe holes and the edge of the corresponding heat exchange fin, a number of convex holes are provided; the convex holes all protrude to both sides along the normal direction of the corresponding heat exchange fin, forming a flue gas channel matching the flow direction of hot air in the heating chamber. This patent improves the exchange efficiency of hot air, improves the heat exchange conditions of the part of the heat exchange fin far from the heat source, improves the heat exchange efficiency, and increases water pipe holes on the basis of the original technology, increasing the heat exchange area and improving the use efficiency.

[0004] In the above patent, by improving the exchange efficiency of hot air, the heat exchange conditions of the part of the heat exchange fin far from the heat source are improved, the heat exchange efficiency is improved, and water pipe holes are added on the basis of the original technology to improve the use efficiency. However, it is difficult to remove the scale at the water inlet point. Excessive scale attached to the water inlet point will slow down the water flow rate. The slowdown of the water flow rate will make it easier for scale to form on the surface of the heat exchanger pipes or plates, hindering heat transfer, resulting in a decrease in the heat exchange efficiency of the heat exchanger, and more energy is required to reach the required temperature or pressure, thereby increasing energy consumption and operating costs. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides an efficient heat exchanger for a water heater and a control method therefor, solving the problems raised in the above background art.

[0006] To achieve the above object, the present invention is realized through the following technical solutions: An efficient heat exchanger for a water heater, including a heat exchange chamber, further including a descaling device and a maintenance device. Among them, a combustion chamber is fixedly installed on the surface of the heat exchange chamber, and a water outlet device is fixedly installed on the surface of the heat exchange chamber. The combustion chamber is communicated with the inside of the heat exchange chamber through a pipeline. Among them, the descaling device includes an electromagnetic valve, a filter frame, a rotating rod, a rotating blade, a convex block, a spring piece, and an L-shaped rod. The rotation of the rotating blade drives the rotation of the rotating rod, the rotation of the rotating rod drives the rotation of the convex block, and the rotation of the convex block contacts and rubs against the spring piece to generate vibration. The vibration of the spring piece drives the filter frame to resonate together. The resonance of the filter frame and the spring piece removes the water scale at the water inlet point. The electromagnetic valve is fixedly installed on the surface of the heat exchange chamber, the filter frame is fixedly installed on the inner wall of the heat exchange chamber, the rotating rod is rotatably installed on the inner wall of the filter frame, the rotating blade is fixedly installed on the circumferential surface of the rotating rod, the convex block is fixedly installed on the circumferential surface of the rotating rod, the spring piece is fixedly installed on the inner wall of the filter frame, and the L-shaped rod is fixedly installed on the circumferential surface of the rotating rod.

[0007] According to the above technical solution, the L-shaped rod contacts the filter frame, the convex block contacts the spring piece, and the rotation of the rotating rod drives the rotation of the L-shaped rod. The rotation of the L-shaped rod contacts the inner wall of the filter frame to scrape the water scale formed on the inner wall of the filter frame.

[0008] According to the above technical solution, the maintenance device includes a fixing plate, a fixing rod, a sliding plate, a sealing plate, and a limiting frame. After the limit of the limiting frame is released, manually pull the limiting frame downward to move. The downward movement of the limiting frame releases the limit on the sealing plate. The fixing plate is fixedly installed on the surface of the heat exchange chamber, the fixing rod is fixedly installed on the surface of the fixing plate, the sliding plate is slidably installed on the circumferential surface of the fixing rod, the sealing plate is fixedly installed on the top of the sliding plate, a limiting hole is opened at the top of the heat exchange chamber, and the limiting frame is slidably installed on the inner wall of the limiting hole.

[0009] According to the above technical solution, a limiting plate is fixedly installed on the inner wall of the limiting frame, a protection rod is slidably installed on the surface of the heat exchange chamber, the protection rod contacts the limiting frame, a first spring is arranged between the protection rod and the heat exchange chamber, a second spring is arranged between the limiting frame and the limiting hole, a third spring is arranged between the fixing rod and the sliding plate, and a rubber ring is arranged between the sealing plate and the heat exchange chamber. When it is necessary to clean and disassemble the heat exchanger, it is necessary to first manually pull the protection rod to move away from the airbag to release the limit on the limiting frame.

[0010] According to the above technical solution, it further includes a sealing device and an anti-pulling device. The sealing device includes an airbag, a button, a stabilizing frame, a detection frame, a detection plate, and a detection rod. The detection rod moves downward to press the button, and the button drives the electromagnetic valve to resume sealing the heat exchange chamber to stop the water inlet operation of the heat exchanger when pressed by the detection rod. A detection hole is provided on the surface of the heat exchange chamber, the airbag is fixedly installed on the inner wall of the detection hole, the button is fixedly installed on the top of the electromagnetic valve, the stabilizing frame is fixedly installed on the top of the electromagnetic valve, the detection frame is fixedly installed on the top of the stabilizing frame, the detection plate is slidably installed on the inner wall of the detection frame, the detection rod is fixedly installed at the bottom of the detection plate, and the airbag is communicated with the inside of the detection frame through a hose.

[0011] According to the above technical solution, the button is electrically connected to the electromagnetic valve, and a fourth spring is provided between the detection plate and the detection frame, and the fourth spring can drive the detection plate to reset.

[0012] According to the above technical solution, the anti-pulling device includes a corrugated pipe, a connecting piece, an inclined plane block, an anti-pulling rod, a protection disc, and an anti-pulling spring. The movement of the anti-pulling rod and the protection disc drives the anti-pulling spring to move and deform, and the anti-pulling spring and the corrugated pipe move together to deform to buffer the pulling force on the pipe connected by the connecting piece. The corrugated pipe is fixedly installed on the surface of the electromagnetic valve, the connecting piece is fixedly installed on the surface of the corrugated pipe, the inclined plane block is fixedly installed on the surface of the electromagnetic valve, the anti-pulling rod slidably penetrates through the surface of the inclined plane block, the protection disc is fixedly installed on the surface of the anti-pulling rod, and an anti-pulling spring is provided between the inclined plane block and the anti-pulling rod.

[0013] According to the above technical solution, a rubber block is fixedly installed on the circumferential surface of the anti-pulling rod, and non-Newtonian fluid is provided inside the rubber block, and the anti-pulling rod can only move slowly so that the pipe connected by the corrugated pipe and the connecting piece moves slowly.

[0014] A control method for an efficient heat exchanger for a water heater includes the following steps: Step 1: Cold water is introduced into the heat exchange chamber through the corrugated pipe and the electromagnetic valve, and the cold water introduced into the heat exchange chamber will pass through the filter frame and be filtered by the filter frame; Step 2: The combustion chamber introduces the hot gas generated by combustion into the heat exchange chamber through a pipe to contact with the cold water for heat exchange; Step 3: When cold water is introduced into the heat exchange chamber through the corrugated pipe and the electromagnetic valve, the cold water impacts the rotating blades to drive the rotating blades to rotate, so that the L-shaped rod rotates and contacts the inner wall of the filter frame to scrape and clean the scale formed on the inner wall of the filter frame; Step 4: The rotating rod rotates to drive the convex block to rotate, and the convex block rotates and contacts the elastic piece to generate friction and vibration, and the filter frame and the elastic piece resonate to further remove the scale at the water inlet point.

[0015] The present invention provides a high-efficiency heat exchanger for a water heater and a control method thereof. The invention has the following beneficial effects: (1) In the present invention, the rotation of the rotating rod drives the L-shaped rod to rotate. The L-shaped rod rotates and contacts the inner wall of the filter frame to scrape the scale formed on the inner wall of the filter frame. Scraping the scale formed on the inner wall of the filter frame can remove the scale accumulated at the water inlet point and accelerate the water flow rate. The accelerated water flow rate will make it difficult for scale to form on the surface of the heat exchanger pipe or plate, eliminate the scale insulation layer that hinders heat transfer, and thus improve the heat exchange efficiency. At the same time, the vibration of the spring drives the filter frame to resonate together, and the filtered water can remove suspended particles and impurities in the water, such as sediment and silt. These particulate matter may be deposited and accumulated inside the heat exchanger to form scale. The vibration of the filter frame can further improve the filtering effect.

[0016] (2) In the present invention, when the heat exchanger needs to be cleaned and disassembled, it is necessary to first manually pull the protective rod in the direction away from the airbag to break away from the contact with the limit plate and release the limit on the limit frame. If the inside of the heat exchanger is opened by mistake, it may cause damage or destruction to the equipment, thereby affecting its normal operation. Preventing accidental touch can maintain the stability of the heat exchanger and reduce the cost and time of maintenance or replacement. At the same time, the slide plate moves in the direction away from the fixed plate under the elastic force of the No. 3 spring, driving the sealing plate to move and release the seal on the top of the heat exchange chamber. The heat exchanger that is easy to disassemble makes maintenance and repair work more convenient. The operator can easily disassemble the various components of the heat exchanger for cleaning, thereby keeping the heat exchanger in good condition and improving its operating efficiency.

[0017] (3) In the present invention, the detection rod is moved downward to press the button. The button is pressed by the detection rod to drive the electromagnetic valve to restore the seal of the heat exchange chamber and stop the water intake of the heat exchanger. The secondary sealing of the water inlet can ensure that water will not leak or penetrate into areas that should not be entered before the heat exchanger is reassembled, which helps to avoid water leakage during equipment maintenance and keep the heat exchanger safe during maintenance or cleaning.

[0018] (4) The invention buffers the pulling force on the pipe connected to the connector by deforming the anti-tension spring together with the bellows. Pulling of the pipe may damage the pipe itself and the connector, thereby affecting the normal operation of the heat exchanger. Preventing the pipe from being pulled can protect the integrity of the equipment and avoid the repair or replacement costs caused by it. At the same time, if the external force pulling the pipe is too large, the anti-tension rod can only move slowly, causing the pipe connected to the bellows and the connector to move slowly, preventing the water inlet pipe from being damaged due to excessive external pulling. Strong pulling may cause stress concentration in the pipe, increasing the risk of pipe rupture or breakage. By further protecting the pipe, the possibility of pipe rupture is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1Schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the positional structure of the heat exchange chamber and the combustion chamber of the present invention; Figure 3 Schematic diagram of the positional structure of the heat exchange chamber and the airbag of the present invention; Figure 4 Schematic diagram of the positional structure of the corrugated pipe and the connecting piece of the present invention; Figure 5 For the present invention Figure 4 Enlarged schematic diagram of the structure of part A in; Figure 6 For the present invention Figure 2 Enlarged schematic diagram of the structure of part B in; Figure 7 For the present invention Figure 2 Enlarged schematic diagram of the structure of part C in.

[0020] In the figure: 1. Heat exchange chamber; 2. Combustion chamber; 3. Water outlet device; 4. Electromagnetic valve; 5. Filter frame; 6. Rotating rod; 7. Rotating blade; 8. Convex block; 9. Elastic sheet; 10. L-shaped rod; 111. Fixed plate; 112. Fixed rod; 113. Slide plate; 114. Sealing plate; 115. Limit frame; 116. Limit plate; 117. Protection rod; 121. Airbag; 122. Button; 123. Stable frame; 124. Detection frame; 125. Detection plate; 126. Detection rod; 131. Corrugated pipe; 132. Connecting piece; 133. Inclined plane block; 134. Anti-pull rod; 135. Protection disc; 136. Anti-pull spring; 137. Rubber block. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1 - 5, one embodiment of the present invention is: a high - efficiency heat exchanger for a water heater, including a heat exchange chamber 1, and also including a descaling device and a maintenance device. Among them, a combustion chamber 2 is fixedly installed on the surface of the heat exchange chamber 1, and a water outlet device 3 is fixedly installed on the surface of the heat exchange chamber 1. The combustion chamber 2 is connected to the inside of the heat exchange chamber 1 through a pipeline. Among them, the descaling device includes an electromagnetic valve 4, a filter frame 5, a rotating rod 6, a rotating blade 7, a convex block 8, a spring piece 9, and an L - shaped rod 10. The electromagnetic valve 4 is fixedly installed on the surface of the heat exchange chamber 1, the filter frame 5 is fixedly installed on the inner wall of the heat exchange chamber 1, the rotating rod 6 is rotatably installed on the inner wall of the filter frame 5, the rotating blade 7 is fixedly installed on the circumferential surface of the rotating rod 6, the convex block 8 is fixedly installed on the circumferential surface of the rotating rod 6, the spring piece 9 is fixedly installed on the inner wall of the filter frame 5, and the L - shaped rod 10 is fixedly installed on the circumferential surface of the rotating rod 6. Scratching the water scale formed on the inner wall of the filter frame 5 can remove the water scale accumulated at the water inlet point, accelerate the water flow rate. The acceleration of the water flow rate will make it not easy to form water scale on the surface of the heat exchanger pipeline or plate, eliminate the water scale insulation layer that hinders heat transfer, thereby improving the heat exchange efficiency. The vibration of the filter frame can further improve the filtering effect.

[0023] The L - shaped rod 10 contacts the filter frame 5, and the convex block 8 contacts the spring piece 9.

[0024] The maintenance device includes a fixed plate 111, a fixed rod 112, a sliding plate 113, a sealing plate 114, and a limiting frame 115. The fixed plate 111 is fixedly installed on the surface of the heat exchange chamber 1, the fixed rod 112 is fixedly installed on the surface of the fixed plate 111, the sliding plate 113 is slidably installed on the circumferential surface of the fixed rod 112, the sealing plate 114 is fixedly installed on the top of the sliding plate 113. A limiting hole is opened at the top of the heat exchange chamber 1, and the limiting frame 115 is slidably installed on the inner wall of the limiting hole. The heat exchanger that is convenient to disassemble makes the maintenance and repair work more convenient. The operator can easily disassemble each component of the heat exchanger for cleaning, so as to keep the heat exchanger in good condition.

[0025] A limiting plate 116 is fixedly installed on the inner wall of the limiting frame 115. A protection rod 117 is slidably installed on the surface of the heat exchange chamber 1. The protection rod 117 contacts the limiting frame 115. A first spring is arranged between the protection rod 117 and the heat exchange chamber 1. A second spring is arranged between the limiting frame 115 and the limiting hole. A third spring is arranged between the fixed rod 112 and the sliding plate 113. A rubber ring is arranged between the sealing plate 114 and the heat exchange chamber 1. Preventing accidental touch can keep the stability of the heat exchanger during operation, reducing the cost and time of maintenance or replacement.

[0026] A control method for a high - efficiency heat exchanger for a water heater includes the following steps: Step 1: Cold water is introduced into the inside of the heat exchange chamber 1 through a bellows 131 and the electromagnetic valve 4. The cold water introduced into the inside of the heat exchange chamber 1 will pass through the filter frame 5 and be filtered by the filter frame 5; Step 2: The combustion chamber 2 conducts the hot combustion gas into the heat exchange chamber 1 through a pipeline to contact with cold water for heat exchange. Step 3: When the cold water is introduced into the heat exchange chamber 1 through the corrugated pipe 131 and the electromagnetic valve 4, the cold water impacts the rotating blade 7 to drive the rotating blade 7 to rotate, causing the L-shaped rod 10 to rotate and contact the inner wall of the filter frame 5 to scrape and clean the scale formed on the inner wall of the filter frame 5. Step 4: The rotating rod 6 rotates to drive the convex block 8 to rotate. The convex block 8 rotates and contacts the elastic sheet 9 to generate friction and vibration. The filter frame 5 and the elastic sheet 9 resonate to further remove the scale at the water inlet point.

[0027] During the operation of this embodiment: When the heat exchanger is operating normally, the cold water is introduced into the heat exchange chamber 1 through the corrugated pipe 131 and the electromagnetic valve 4. The cold water introduced into the heat exchange chamber 1 will pass through the filter frame 5 and be filtered by the filter frame 5. At the same time, the combustion chamber 2 conducts the hot combustion gas into the heat exchange chamber 1 through a pipeline to contact with cold water for heat exchange. When the cold water is introduced into the heat exchange chamber 1 through the corrugated pipe 131 and the electromagnetic valve 4, the cold water impacts the rotating blade 7 to drive the rotating blade 7 to rotate. The rotating blade 7 rotates to drive the rotating rod 6 to rotate. The rotating rod 6 rotates to drive the L-shaped rod 10 to rotate. The L-shaped rod 10 rotates and contacts the inner wall of the filter frame 5 to scrape the scale formed on the inner wall of the filter frame 5. At the same time, the cold water impacts the rotating blade 7 to drive the rotating blade 7 to rotate. The rotating blade 7 rotates to drive the rotating rod 6 to rotate. The rotating rod 6 rotates to drive the convex block 8 to rotate. The convex block 8 rotates and contacts the elastic sheet 9 to generate friction and vibration. The elastic sheet 9 vibrates to drive the filter frame 5 to resonate together. The filter frame 5 and the elastic sheet 9 resonate to remove the scale at the water inlet point.

[0028] When the heat exchanger needs to be cleaned and disassembled, it is necessary to first manually pull the protection rod 117 to move away from the airbag 121. The protection rod 117 moves away from the airbag 121 to disengage from the contact with the limit plate 116 and release the limit on the limit frame 115. After the limit on the limit frame 115 is released, manually pull the limit frame 115 to move downward. The limit frame 115 moves downward to release the limit on the sealing plate 114. After the limit on the sealing plate 114 is released, the sliding plate 113 moves away from the fixed plate 111 under the elastic force of the third spring. The sliding plate 113 moves away from the fixed plate 111 under the elastic force of the third spring to drive the sealing plate 114 to move and release the seal on the top of the heat exchange chamber 1.

[0029] Please refer to Figures 1 - 7, on the basis of the above embodiments, in another embodiment of the present invention, a sealing device and an anti-pulling device are further included. The sealing device includes an airbag 121, a button 122, a stabilizing frame 123, a detection frame 124, a detection plate 125 and a detection rod 126. A detection hole is formed on the surface of the heat exchange chamber 1. The airbag 121 is fixedly installed on the inner wall of the detection hole. The button 122 is fixedly installed on the top of the electromagnetic valve 4. The stabilizing frame 123 is fixedly installed on the top of the electromagnetic valve 4. The detection frame 124 is fixedly installed on the top of the stabilizing frame 123. The detection plate 125 is slidably installed on the inner wall of the detection frame 124. The detection rod 126 is fixedly installed on the bottom of the detection plate 125. The airbag 121 is communicated with the inside of the detection frame 124 through a hose. The secondary sealed water inlet can ensure that water will not leak or seep into areas where it should not enter before the heat exchanger is reassembled, which helps to avoid water leakage problems during equipment maintenance and keep the heat exchanger safe during maintenance or cleaning.

[0030] The button 122 is electrically connected to the electromagnetic valve 4. A fourth spring is arranged between the detection plate 125 and the detection frame 124, and the fourth spring can drive the detection plate 125 to reset.

[0031] The anti-pulling device includes a corrugated pipe 131, a connecting piece 132, an inclined plane block 133, an anti-pulling rod 134, a protection disc 135 and an anti-pulling spring 136. The corrugated pipe 131 is fixedly installed on the surface of the electromagnetic valve 4. The connecting piece 132 is fixedly installed on the surface of the corrugated pipe 131. The inclined plane block 133 is fixedly installed on the surface of the electromagnetic valve 4. The anti-pulling rod 134 slidably penetrates through the surface of the inclined plane block 133. The protection disc 135 is fixedly installed on the surface of the anti-pulling rod 134. An anti-pulling spring 136 is arranged between the inclined plane block 133 and the anti-pulling rod 134. Preventing the pipeline from being pulled can protect the integrity of the equipment and avoid the maintenance or replacement costs caused thereby.

[0032] A rubber block 137 is fixedly installed on the circumferential surface of the anti-pulling rod 134, and a non-Newtonian fluid is arranged inside the rubber block 137, which further protects the pipeline and reduces the possibility of pipeline rupture.

[0033] During the operation of this embodiment: After the limit of the limit frame 115 is released, manually pull the limit frame 115 downward. The downward movement of the limit frame 115 releases the limit on the sealing plate 114. After the limit on the sealing plate 114 is released, the sliding plate 113 moves away from the fixed plate 111 under the elastic force of the third spring. The sliding plate 113 moves away from the fixed plate 111 under the elastic force of the third spring and contacts the airbag 121 to squeeze the airbag 121. The airbag 121 deforms under the squeeze of the sliding plate 113. The deformation of the airbag 121 squeezes the gas inside the airbag 121. The gas inside the airbag 121 enters the inside of the detection frame 124 through the hose under the squeeze of the airbag 121. The gas entering the inside of the detection frame 124 squeezes the detection plate 125. The detection plate 125 moves downward under the squeeze of the gas entering the inside of the detection frame 124. The downward movement of the detection plate 125 drives the detection rod 126 to move downward. The downward movement of the detection rod 126 presses the button 122. The button 122 is pressed by the detection rod 126 to drive the solenoid valve 4 to resume sealing the heat exchange chamber 1 and stop the water inlet operation of the heat exchanger.

[0034] When the pipeline at the water inlet point is subjected to external force extrusion or pulling, the pipeline connected to the connecting piece 132 moves under the force, driving the connecting piece 132 to move. The connecting piece 132 drives the corrugated pipe 131 to move and deform. The movement and deformation of the corrugated pipe 131 drive the anti-pulling rod 134 and the protection disc 135 to move. The movement of the anti-pulling rod 134 and the protection disc 135 drives the anti-pulling spring 136 to move and deform. The anti-pulling spring 136 and the corrugated pipe 131 move and deform together to buffer the pulling force received by the pipeline connected to the connecting piece 132. At the same time, if the external force pulling the pipeline is too large, the excessive external force pulling will drive the anti-pulling rod 134 to move quickly. The rapid movement of the anti-pulling rod 134 drives the rubber block 137 to move quickly. The rubber block 137 moves quickly and contacts the inclined plane block 133. The non-Newtonian fluid inside the rubber block 137 can only slowly deform under the squeeze of the inclined plane block 133. The slow deformation of the rubber block 137 makes the anti-pulling rod 134 can only move slowly. The slow movement of the anti-pulling rod 134 makes the pipeline connected to the corrugated pipe 131 and the connecting piece 132 move slowly, preventing the water inlet pipeline from being damaged due to excessive external force pulling.

[0035] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An efficient heat exchanger for a water heater, comprising a heat exchange chamber (1), characterized in that: It also includes a descaling device, a maintenance device, a sealing device and an anti-pulling device; Among them, a combustion chamber (2) is fixedly installed on the surface of the heat exchange chamber (1), a water outlet device (3) is fixedly installed on the surface of the heat exchange chamber (1), and the combustion chamber (2) is communicated with the inside of the heat exchange chamber (1) through a pipeline; Among them, the descaling device includes an electromagnetic valve (4), a filter frame (5), a rotating rod (6), a rotating blade (7), a bump (8), a spring piece (9) and an L-shaped rod (10). The electromagnetic valve (4) is fixedly installed on the surface of the heat exchange chamber (1), the filter frame (5) is fixedly installed on the inner wall of the heat exchange chamber (1), the rotating rod (6) is rotatably installed on the inner wall of the filter frame (5), the rotating blade (7) is fixedly installed on the circumferential surface of the rotating rod (6), the bump (8) is fixedly installed on the circumferential surface of the rotating rod (6), the spring piece (9) is fixedly installed on the inner wall of the filter frame (5), and the L-shaped rod (10) is fixedly installed on the circumferential surface of the rotating rod (6).

2. The high-efficiency heat exchanger for a water heater according to claim 1, wherein: The L-shaped rod (10) contacts the filter frame (5), and the bump (8) contacts the spring piece (9).

3. The highly efficient heat exchanger for a water heater according to claim 2, characterized in that: The maintenance device includes a fixing plate (111), a fixing rod (112), a sliding plate (113), a sealing plate (114) and a limiting frame (115). The fixing plate (111) is fixedly installed on the surface of the heat exchange chamber (1), the fixing rod (112) is fixedly installed on the surface of the fixing plate (111), the sliding plate (113) is slidably installed on the circumferential surface of the fixing rod (112), the sealing plate (114) is fixedly installed on the top of the sliding plate (113), a limiting hole is opened at the top of the heat exchange chamber (1), and the limiting frame (115) is slidably installed on the inner wall of the limiting hole.

4. The high-efficiency heat exchanger for a water heater according to claim 3, characterized in that: A limiting plate (116) is fixedly installed on the inner wall of the limiting frame (115), a protection rod (117) is slidably installed on the surface of the heat exchange chamber (1), the protection rod (117) contacts the limiting frame (115), a first spring is arranged between the protection rod (117) and the heat exchange chamber (1), a second spring is arranged between the limiting frame (115) and the limiting hole, a third spring is arranged between the fixing rod (112) and the sliding plate (113), and a rubber ring is arranged between the sealing plate (114) and the heat exchange chamber (1).

5. The high-efficiency heat exchanger for a water heater according to claim 4, characterized in that: The sealing device includes an airbag (121), a button (122), a stabilizing frame (123), a detection frame (124), a detection plate (125) and a detection rod (126). A detection hole is opened on the surface of the heat exchange chamber (1), the airbag (121) is fixedly installed on the inner wall of the detection hole, the button (122) is fixedly installed on the top of the electromagnetic valve (4), the stabilizing frame (123) is fixedly installed on the top of the electromagnetic valve (4), the detection frame (124) is fixedly installed on the top of the stabilizing frame (123), the detection plate (125) is slidably installed on the inner wall of the detection frame (124), the detection rod (126) is fixedly installed on the bottom of the detection plate (125), and the airbag (121) is communicated with the inside of the detection frame (124) through a hose.

6. The high-efficiency heat exchanger for a water heater according to claim 5, characterized in that: The button (122) is electrically connected to the electromagnetic valve (4), and a fourth spring is provided between the detection plate (125) and the detection frame (124).

7. The high-efficiency heat exchanger for a water heater according to claim 6, characterized in that: The anti-pulling device includes a corrugated pipe (131), a connecting piece (132), an inclined plane block (133), an anti-pulling rod (134), a protection disc (135) and an anti-pulling spring (136). The corrugated pipe (131) is fixedly installed on the surface of the electromagnetic valve (4), the connecting piece (132) is fixedly installed on the surface of the corrugated pipe (131), the inclined plane block (133) is fixedly installed on the surface of the electromagnetic valve (4), the anti-pulling rod (134) slidably penetrates through the surface of the inclined plane block (133), the protection disc (135) is fixedly installed on the surface of the anti-pulling rod (134), and an anti-pulling spring (136) is provided between the inclined plane block (133) and the anti-pulling rod (134).

8. The high-efficiency heat exchanger for a water heater according to claim 7, wherein: A rubber block (137) is fixedly installed on the circumferential surface of the anti-pulling rod (134), and a non-Newtonian fluid is provided inside the rubber block (137).

9. The control method of an efficient heat exchanger for a water heater according to claim 8, characterized in that, It includes the following steps: Step 1: Cold water is introduced into the heat exchange chamber (1) through the corrugated pipe (131) and the electromagnetic valve (4). The cold water introduced into the heat exchange chamber (1) will pass through the filter frame (5) and be filtered by the filter frame (5). Step 2: The hot gas generated by the combustion chamber (2) is introduced into the heat exchange chamber (1) through a pipeline to contact with the cold water for heat exchange. Step 3: When cold water is introduced into the heat exchange chamber (1) through the corrugated pipe (131) and the electromagnetic valve (4), the cold water impacts the rotating blade (7) to drive the rotating blade (7) to rotate, so that the L-shaped rod (10) rotates and contacts the inner wall of the filter frame (5) to scrape and clean the scale formed on the inner wall of the filter frame (5). Step 4: The rotating rod (6) rotates to drive the convex block (8) to rotate. The convex block (8) rotates and contacts the elastic piece (9) to generate vibration by friction. The filter frame (5) and the elastic piece (9) resonate to further remove the scale at the water inlet point.

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