Efficient heat exchanger with double-face heating function

Abstract

According to the double-face heating efficient heat exchanger, a combustion heat exchange channel is formed in the middle of the heat exchanger, left water flow heat exchange through holes are formed in the left side wall of the heat exchanger, and right water flow heat exchange through holes are formed in the right side wall of the heat exchanger; the left water flow heat exchange through holes and the right water flow heat exchange through holes are naked water channels; a three-way water inlet device is arranged at the water inlet ends of the left water flow heat exchange through hole and the right water flow heat exchange through hole and communicates with the left water flow heat exchange through hole and the right water flow heat exchange through hole in parallel. A three-way water outlet device is arranged at the water outlet ends of the left water flow heat exchange through hole and the right water flow heat exchange through hole and communicates with the left water flow heat exchange through hole and the right water flow heat exchange through hole in parallel. Water flow is divided into two parts to be circulated and heated, water is heated on the two sides of the heat exchanger, heat on the two sides of the heat exchanger is absorbed, heat loss is reduced, heat utilization is better, and the water heating efficiency in unit time is improved.

Description

Technical Field

[0001] This invention relates to a water heating device for gas water heaters, and more particularly to a high-efficiency heat exchanger with double-sided heating. Background Technology

[0002] 1. Chinese Patent Publication No. CN215724134U discloses a combustion heat exchanger for improving heat utilization. The combustion heat exchanger is made of aluminum and includes a base and a cover. The cover is sealed to the front of the base by a sealing ring. The combustion heat exchanger has a burner inlet at the top, a combustion chamber in the upper inner part, combustion heat exchange channels in the middle and lower inner parts, and a flue gas outlet at the bottom. The burner inlet, combustion chamber, combustion heat exchange channels, and flue gas outlet are connected. A meandering water inlet pipe is fixedly enclosed in the back of the base. One end of the water inlet pipe is a water inlet connector, and the other end is a water outlet connector. A second meandering water inlet pipe is fixedly enclosed in the cover. One end of the second water inlet pipe is a water inlet connector, and the other end is a water outlet connector. The combustion heat exchange channels of the base consist of several heat exchange fins extending from the inner bottom of the base and heat exchange gaps. The heat exchange gaps are between the heat exchange fins. The reverse side of the cover extends with several heat exchange fins, forming heat exchange gaps. The heat exchange fins are inserted into heat exchange gaps, and the heat exchange fins are inserted into heat exchange gaps, creating a staggered interlocking arrangement. The entire outer surface of the combustion heat exchanger is covered with a heat-insulating coating. The first and second water inlet pipes are made of copper. A burner mounting port is located on one side wall of the top of the combustion heat exchanger. The inner diameter of the first water inlet pipe is larger than that of the second water inlet pipe. The inner diameter of the first water inlet pipe is 20 mm; the inner diameter of the second water inlet pipe is 15 mm. The first and second water inlet pipes have a transversely winding curve. The first and second water inlet pipes also have a longitudinally winding curve.

[0003] The product described above has a meandering water inlet pipe 1 wrapped and fixed inside the back of the base, and a meandering water inlet pipe 2 wrapped and fixed inside the cover, forming front and rear heating. It is separated by water inlet pipe 1 and water inlet pipe 2, resulting in low heat utilization and low heat exchange efficiency.

[0004] 2. Chinese Patent Publication No. CN115235112A discloses an environmentally friendly flameless methanol combustion heat exchanger, characterized by: a heat exchange shell containing a U-shaped heat exchange channel, with a flue gas outlet at the tail end and an air inlet at the front end, and a fan fixedly installed at either the flue gas outlet or the air inlet; the heat exchange shell is composed of a back shell plate, a middle layer plate, and a top cover shell, forming a U-shaped heat exchange channel; a water inlet pipe is fixedly enclosed within the back shell plate, with pipe joints extending from both ends of the water inlet pipe, including an inlet joint and an outlet joint; a methanol catalytic device is fixedly installed in the channel between the middle layer plate and the top cover shell, and a methanol spray chamber is provided between the methanol catalytic device and the air inlet; a methanol spray head is fixedly installed on the top cover shell, arranged in the methanol spray chamber, and aimed above the methanol catalytic device; a condensate outlet is provided at the bottom of the U-shaped heat exchange channel; and the fan is connected to a controller via an electrical wire. The middle layer plate contains a second water inlet pipe, and water pipe connectors extend from both ends of the second water inlet pipe, including an inlet connector and an outlet connector.

[0005] The above product has a water inlet pipe 1 wrapped and fixed inside the back shell and a water inlet pipe 2 wrapped and fixed inside the middle shell, forming front and rear heating. However, the water inlet pipe 1 and water inlet pipe 2 are separated, resulting in low heat utilization and low heat exchange efficiency. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides a structure with a reasonable design.

[0007] The solution to the above technical problem is as follows:

[0008] A high-efficiency heat exchanger with double-sided heating, belonging to the category of water heater components, is made of metal. A combustion heat exchange channel is formed in the middle of the heat exchanger, with one end serving as a combustion port and the other end as a flue gas outlet. The combustion heat exchange channel is flat. The high-efficiency heat exchanger also includes a three-way water inlet device, at least one independent left-side water flow heat exchange through-hole, at least one independent right-side water flow heat exchange through-hole, and a three-way water outlet device. A left-side water flow heat exchange through-hole is formed inside the left side wall of the heat exchanger. The heat exchanger has a right-side water flow heat exchange through-hole inside the right side wall; the left-side and right-side water flow heat exchange through-holes are bare water channels; the inlet ends of the left-side and right-side water flow heat exchange through-holes are equipped with three-way water inlet devices, which are connected in parallel with the left-side and right-side water flow heat exchange through-holes; the outlet ends of the left-side and right-side water flow heat exchange through-holes are equipped with three-way water outlet devices, which are connected in parallel with the left-side and right-side water flow heat exchange through-holes.

[0009] The beneficial effects of this invention's double-sided heating high-efficiency heat exchanger are as follows: The structural design splits the water flow into two for heating, creating a bare water channel. This splitting of the water flow diverts the water flow for reheating, allowing the water to be heated on both sides of the heat exchanger, absorbing heat from both sides, reducing heat loss, improving heat utilization, significantly extending the heat exchange path, and increasing the efficiency of water heating per unit time. It also saves on gas consumption per unit temperature. The inlet and outlet water flow rates remain constant, meeting heating needs. Furthermore, the optimized layout of the flat combustion heat exchange channel and the double-sided water channels improves space utilization, making the overall structure more compact and suitable for various installation environments; the flat combustion heat exchange channel also enhances the uniformity of heat exchange on both sides. Attached Figure Description

[0010] Figures 1-2 This is a perspective view of the product of the present invention;

[0011] Figure 3 for Figure 2 A cross-sectional view of the product;

[0012] Figures 4-5 for Figure 1 , Figure 2 Product breakdown diagram;

[0013] Figure 6 This is a perspective view of the product of the present invention;

[0014] Figure 7 for Figure 6 A cross-sectional view of the product;

[0015] Figure 8 for Figure 6 Product breakdown diagram;

[0016] Figures 9-10 This is a perspective view of the product of the present invention;

[0017] Figure 11 for Figure 10 A cross-sectional view of the product;

[0018] Figures 12-13 for Figure 9 , Figure 10 Product breakdown diagram;

[0019] Figure 14 This is a perspective view of the product of the present invention;

[0020] Figure 15 for Figure 14 Product breakdown diagram;

[0021] Figure 16 for Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 A schematic diagram of the water flow plane of the product.

[0022] Combustion port 1, Combustion heat exchange channel 2, Heat absorber fin 201, Heat absorber protrusion 202, Left half heat exchange channel 21, Right half heat exchange channel 22, Smoke outlet 3, Smoke collection chamber 31, Three-way water inlet device 4, Three-way water inlet connector 41, External water inlet 401, Right water inlet connector 402, External water inlet pipe connector 403, Two-way water inlet channel 404, Three-way water inlet pipe connector 405, Left water inlet connector 406, Left side water inlet hole 407, Left side water flow heat exchange through hole 51, Left side water flow heat exchange through hole 52, Left side water flow heat exchange through hole 501, Left side water flow heat exchange channel 502, Right side water flow heat exchange hole 61, Right side water flow heat exchange hole 62, Right side water flow heat exchange channel 601, Right side water flow heat exchange channel 602, Three-way water outlet device 7, Three-way water outlet connector 71, Outlet water outlet 701, Right outlet water inlet protrusion 702, Outlet water pipe connector 703, Outlet two-way water channel 704, Outlet three-way water pipe connector 705, Left outlet water inlet protrusion 706, Left side water outlet hole 707, Left side metal heat exchange shell A, Left side metal heat exchange body A1, Left outer side Wall water tank cover A2, right side metal heat exchange shell B, right side metal heat exchange body B1, right outer wall water tank cover B2, first inlet tee connector 4A, first inner water inlet hole 4A1, first external water inlet 4A2, first inlet protrusion 4A3, first external water inlet short pipe connector 4A4, first inner water distribution short pipe connector 4A5, second inlet tee connector 4B, second inner water inlet hole 4B1, second external water inlet 4B2, second inlet protrusion 4B3, second external water inlet short pipe connector 4B4, second inner... Water distribution short pipe connector 4B5, first outlet tee connector 7A, first inner outlet through hole 7A1, first external outlet 7A2, first outlet protrusion 7A3, first outlet short pipe connector 7A4, first inner water confluence short pipe connector 7A5, second outlet tee connector 7B, second inner outlet through hole 7B1, second external outlet 7B2, second outlet protrusion 7B3, second outlet short pipe connector 7B4, second inner water confluence short pipe connector 7B5, heat exchange plate 601A, electronic anode rod 8. Detailed Implementation

[0023] like Figures 1 to 16 As shown: Figures 1 to 16As shown: A high-efficiency heat exchanger with double-sided heating is a component of a gas-fired water heater. The heat exchanger is rectangular in shape and is mainly used for heating. The heat exchanger is made of metal; preferably, the heat exchanger is mainly made of aluminum. A combustion heat exchange channel 2 is opened in the middle of the heat exchanger. One end of the combustion heat exchange channel 2 is a combustion port 1, and the other end is a flue gas outlet 3. The combustion port 1 is used to install a gas burner for combustion. Combustion occurs in the combustion port 1, heat flows and exchanges through the combustion heat exchange channel 2, and finally the flue gas is discharged from the flue gas outlet 3. The combustion heat exchange channel 2 is flat, which improves heat exchange efficiency and increases the combustion area while minimizing the thickness of the heat exchanger. The high-efficiency heat exchanger also includes a three-way water inlet device 4, at least one independent left-side water flow heat exchange through-hole 51, at least one independent right-side water flow heat exchange through-hole 61, and a three-way water outlet device 7. The left-side water flow heat exchange through-hole 51 is opened inside the left side wall of the heat exchanger. The left-side water flow heat exchange through-hole 51 is meandering and increases the length of the water flow through-hole within a limited volume to improve heat exchange efficiency. The right-side water flow heat exchange through-hole 51 is opened inside the right side wall of the heat exchanger. The right-side water flow heat exchange through-hole 61 is meandering, increasing the length of the water flow through-hole within a limited volume to improve heat exchange efficiency. The left-side and right-side water flow heat exchange through-holes 51 and 61 are bare water channels, allowing for rapid heat absorption and high heat exchange efficiency. The wall thickness between the left-side and right-side water flow heat exchange through-holes 51 and 61 and the combustion heat exchange channel 2 is 1.5 mm to 3 mm, a moderate thickness for rapid heat transfer. A three-way water inlet device 4 is provided at the water inlet end of the left-side and right-side water flow heat exchange through-holes 51 and 61. The combustion heat exchange channel 2 is connected in parallel with the left water flow heat exchange hole 51 and the right water flow heat exchange hole 61. After entering through the three-way water inlet device 4, the incoming water flows out in two separate streams: one stream enters the left water flow heat exchange hole 51, and the other enters the right water flow heat exchange hole 61. The outlets of the left and right water flow heat exchange holes 51 and 61 are equipped with three-way water outlet devices 7. The water is heated through the two streams and then combined before flowing out through the three-way water outlet device 7. The three-way water outlet device 7 is connected in parallel with the left and right water flow heat exchange holes 51 and 61. The left and right sides of the combustion heat exchange channel 2 are adjacent to the corresponding left and right water flow heat exchange holes 51 and 61, enabling efficient heat transfer from the flame to the water channels on both sides. The use of an aluminum heat exchanger further improves the overall heat exchange efficiency while reducing the weight of the equipment. This structural design splits the water flow into two streams for heating, thus reducing the water flow rate before reheating. This allows the water to be heated on both sides of the heat exchanger, absorbing heat from both sides, reducing heat loss, improving heat utilization, significantly extending the heat exchange path, improving the efficiency of water heating per unit time, and saving gas per unit temperature. The inlet and outlet water flow rates remain unchanged, meeting heating needs.In addition, the layout of the flat combustion heat exchange channel 2 and the double-sided water channels optimizes space utilization, making the overall structure more compact and suitable for various installation environments; the flat combustion heat exchange channel 2 improves the uniformity of heat exchange on the left and right sides.

[0024] Preferably, the high-efficiency heat exchanger includes a left metal heat exchange shell A and a right metal heat exchange shell B. The inner wall of the left metal heat exchange shell A has a left water flow heat exchange through-hole 51, and the inner wall of the right metal heat exchange shell B has a right water flow heat exchange through-hole 61. The inner side wall of the left metal heat exchange shell A has a left half heat exchange channel 21, and the inner side wall of the right metal heat exchange shell B has a right half heat exchange channel 22. The left metal heat exchange shell A and the right metal heat exchange shell B are sealed and fixedly connected, with the left half heat exchanged... Channel 21 and the right half of the heat exchange channel 22 form a complete combustion heat exchange channel 2. A three-way water inlet device 4 is connected to the left metal heat exchange shell A and / or the right metal heat exchange shell B, and a three-way water outlet device 7 is connected to the left metal heat exchange shell A and / or the right metal heat exchange shell B. This is to further refine the structural design of the high-efficiency heat exchanger and facilitate the setting of the combustion heat exchange channel 2. The combustion heat exchange channel 2 is set in two halves and then assembled, which facilitates the processing and assembly of the complete combustion heat exchange channel 2.

[0025] Preferably, a sealing groove is formed on the frame wall where the left metal heat exchange shell A and / or the right metal heat exchange shell B are joined. A high-temperature resistant rubber sealing ring is installed on the sealing groove. Then, several screw assemblies are threaded through the circumference where the left metal heat exchange shell A and the right metal heat exchange shell B are joined and tightened to fix them. In this way, the rubber sealing ring is clamped to form a sealed and fixed connection. Alternatively, the circumference of the joint between the left metal heat exchange shell A and the right metal heat exchange shell B is hot-melted at high temperature to form an integral sealed and fixed connection.

[0026] Preferably, the left-side metal heat exchange shell A includes a left-side metal heat exchange body A1 and a left-side outer wall water tank cover plate A2. The outer wall of the left-side metal heat exchange body A1 has a meandering left-side water flow heat exchange channel 501. The left-side metal heat exchange body A1 is integrally die-cast to form the left-side water flow heat exchange channel 501. The width of the left-side water flow heat exchange channel 501 is generally greater than 1 cm and generally does not exceed 3 cm. The partition plates between the left-side water flow heat exchange channels 501 are raised at the same height. The outer wall of the left-side metal heat exchange body A1 is sealed and fixedly connected to the left-side outer wall water tank cover plate A2, so that the left-side water flow heat exchange channel 501 becomes a left-side water flow heat exchange through hole 51. The above further refines the specific structure of the left-side metal heat exchange shell A. This structure makes it easy to produce and form the left-side water flow heat exchange channel 501. Then, the left-side outer wall water tank cover plate A2 covers the outer wall of the left-side metal heat exchange body A1 to form the left-side water flow heat exchange through hole 51, and it is easy to assemble and fix the left-side outer wall water tank cover plate A2.

[0027] Preferably, a left-circling step is formed on the inner edge of the outer wall of the left-side metal heat exchanger body A1, and a left-circling groove is formed on the left-circling step. A high-temperature resistant left rubber sealing ring is installed on the left-circling groove. The left outer wall water tank cover plate A2 covers the left-circling step and presses the left rubber sealing ring. Then, several screw assemblies are threaded through the circumference of the left outer wall water tank cover plate A2 and tightened to fix it. The left outer wall water tank cover plate A2 is fixedly connected to the circumference of the left-side metal heat exchanger body A1. In this way, the left rubber sealing ring is clamped to form a sealed and fixed connection. Alternatively, the high-temperature hot-melt welding at the joint between the left outer wall water tank cover plate A2 and the circumference of the left-side metal heat exchanger body A1 forms an integral sealed and fixed connection.

[0028] The inner wall of the left metal heat exchange body A1 is provided with a left half heat exchange channel 21. The left half heat exchange channel 21, the left water flow heat exchange channel 501, and the left metal heat exchange body A1 are integrally die-cast, which facilitates the one-time molding of the left half heat exchange channel 21 and the left water flow heat exchange channel 501, resulting in high efficiency and low cost; the left metal heat exchange shell A part is smaller.

[0029] The right-side metal heat exchange shell B includes a right-side metal heat exchange body B1 and a right outer wall water tank cover plate B2. The outer wall of the right-side metal heat exchange body B1 has a meandering right-side water flow heat exchange channel 601. The right-side metal heat exchange body B1 is integrally die-cast to form the right-side water flow heat exchange channel 601. The width of the right-side water flow heat exchange channel 601 is generally greater than 1 cm and generally does not exceed 3 cm. The partition plates between the right-side water flow heat exchange channels 601 are raised at the same height. The right outer wall water tank cover plate B2 is sealed and fixedly connected to the outer wall of the right-side metal heat exchange body B1 to cover the channel opening, so that the right-side water flow heat exchange channel 601 becomes a right-side water flow heat exchange through hole 61. The above further refines the specific structure of the right-side metal heat exchange shell B. This structure makes it easy to produce and form the right-side water flow heat exchange channel 601. Then, the right outer wall water tank cover plate B2 covers the outer wall of the right-side metal heat exchange body B1 to form the right-side water flow heat exchange through hole 61, and it is easy to assemble and fix the right outer wall water tank cover plate B2.

[0030] Preferably, a right-circling step is formed on the inner edge of the outer wall of the right-side metal heat exchanger body B1, and a right-circling groove is formed on the right-circling step. A high-temperature resistant right rubber sealing ring is installed on the right-circling groove. The right outer wall water tank cover plate B2 covers the right-circling step and presses the right rubber sealing ring. Then, several screw assemblies are threaded through the circumference of the right outer wall water tank cover plate B2 and tightened to fix it. The right outer wall water tank cover plate B2 is fixedly connected to the circumference of the right-side metal heat exchanger body B1. In this way, the right rubber sealing ring is clamped to form a sealed and fixed connection. Alternatively, the joint between the right outer wall water tank cover plate B2 and the circumference of the right-side metal heat exchanger body B1 is hot-melted and welded into a whole sealed and fixed connection.

[0031] The inner wall of the right metal heat exchange body B1 is provided with a right half heat exchange channel 22. The right half heat exchange channel 22, the right water flow heat exchange channel 601, and the right metal heat exchange body B1 are integrally die-cast, which facilitates one-time molding of the right half heat exchange channel 22 and the right water flow heat exchange channel 601, resulting in high efficiency and low cost; the right metal heat exchange shell B has a smaller part.

[0032] The left metal heat exchanger body A1 and the right metal heat exchanger body B1 are sealed and fixedly connected; the left metal heat exchanger body A1 and the right metal heat exchanger body B1 are made of aluminum.

[0033] A three-way water inlet device 4 is connected to the left metal heat exchanger body A1 and / or the right metal heat exchanger body B1, and a three-way water outlet device 7 is connected to the left metal heat exchanger body A1 and / or the right metal heat exchanger body B1.

[0034] Preferably, the three-way water inlet device 4 is a three-way water inlet connector 41, which is integrally connected to the right metal heat exchange body B1 (alternatively, the three-way water inlet connector 41 can also be integrally connected to the left metal heat exchange body A1). One end of the three-way water inlet connector 41 is an external water inlet 401, the second end is directly connected to the water inlet end of the right water flow heat exchange through hole 61, and the third end is sealed and connected to the water inlet end of the left water flow heat exchange through hole 51. In this way, the external water enters from the external water inlet 401 and then flows in two paths: one path flows into the right water flow heat exchange through hole 61, and the other path flows into the left water flow heat exchange through hole 51. Under normal conditions, the heat exchanger is horizontally fixed, and the incoming water is split in half and flows in two paths, resulting in consistent heating temperatures on both sides. The above is a further refined structure of the three-way water inlet device 4, which facilitates water diversion heating.

[0035] That is: the three-way water inlet connector 41 includes a right water inlet protrusion 402, an external water inlet pipe connector 403, a two-way water inlet channel 404, a three-way water inlet pipe connector 405, a left water inlet protrusion 406, and a left water inlet hole 407. The right water inlet protrusion 402 is integrally connected to the right metal heat exchange body B1. The external water inlet pipe connector 403 is integrally connected to the outer side of the right water inlet protrusion 402, and the three-way water inlet pipe connector 405 is integrally connected to the inner side of the right water inlet protrusion 402. A two-way water inlet channel 404 is opened in the body of the right water inlet protrusion 402, which is directly connected to the right water flow heat exchange channel 601. The middle of the external water inlet pipe connector 403 is an external water inlet 401. The side of the left metal heat exchange body A1... The wall-mounted extension connection includes a left water inlet protrusion 406. The inner wall of the left water inlet protrusion 406 has a left water inlet hole 407. A water inlet tee connector 405 is inserted into the left water inlet hole 407. A high-temperature resistant rubber sealing ring is clamped between the water inlet tee connector 405 and the left water inlet hole 407, or a high-temperature resistant sealant is used to seal against leakage. The left water inlet hole 407 is connected to the left water flow heat exchange channel 501 (i.e., the left water inlet hole 407 is connected to the left water flow heat exchange hole 51). Therefore, after the external water enters through the external water inlet connector 403, part of it enters the right water flow heat exchange hole 61 through the water inlet two-way channel 404, and the other part enters the left water flow heat exchange hole 51 through the water inlet tee connector 405 and the left water inlet hole 407, thus achieving diversion. The aforementioned three-way water inlet connector 41 structure facilitates the formation of a three-way water flow channel. The three-way water inlet connector 41 is integrally formed with the right-side metal heat exchange body B1, resulting in fewer parts and higher production efficiency. The left water inlet protrusion 406 and the left water inlet hole 407 are integrally formed with the left-side metal heat exchange body A1, resulting in fewer parts and higher production efficiency.

[0036] Preferably, the three-way water outlet device 7 is a three-way water outlet connector 71, which is integrally connected to the right metal heat exchange body B1 (alternatively, the three-way water outlet connector 71 can also be integrally connected to the left metal heat exchange body A1). One of the three-way water outlet connector 71 is an external water outlet 701, the second is directly connected to the water outlet end of the right water flow heat exchange through hole 61, and the third is sealed and connected to the water outlet end of the left water flow heat exchange through hole 51. In this way, the hot water heated from the two separate streams converges at the three-way water outlet connector 71 and then flows out from the external water outlet 701. The above is a further refined structure of the three-way water outlet device 7, which facilitates the convergence and outflow of water.

[0037] Specifically, the three-way water outlet connector 71 includes a right water outlet protrusion 702, an outgoing water pipe connector 703, a two-way water outlet channel 704, and a three-way water outlet connector 705. The right water outlet protrusion 702 is integrally connected to the right side metal heat exchange body B1. The outer side of the right water outlet protrusion 702 is integrally connected to the outgoing water pipe connector 703, and the inner side of the right water outlet protrusion 702 is integrally connected to the three-way water outlet connector 705. The right water outlet protrusion 702 has an outgoing water outlet channel 704 inside, which directly connects to the right side water flow heat exchange channel 601 (i.e., the outgoing water outlet channel 704 directly connects to the right side water flow heat exchange through hole 61). The middle of the outgoing water pipe connector 703 is an outgoing water outlet 701. The left side metal heat exchange... The main body A1 has an integral extension of the side wall with a left water outlet protrusion 706. The left water outlet protrusion 706 has a left water outlet hole 707. The water outlet tee pipe connector 705 is inserted into the left water outlet hole 707. A high-temperature resistant rubber sealing ring is clamped between the water outlet tee pipe connector 705 and the left water outlet hole 707 or a high-temperature resistant sealant is used to seal against leakage. The left water outlet hole 707 is connected to the left water flow heat exchange channel 501. Therefore, the water heated by the right water flow heat exchange channel 61 flows out from the outlet 701 after passing through the outlet two-way water channel 704. The water heated by the left water flow heat exchange channel 51 flows out from the outlet 701 after passing through the left water outlet hole 707 and the water outlet tee pipe connector 705. The water from the two water paths finally merges and flows out at the outlet 701. The aforementioned three-way water outlet connector 71 structure facilitates the formation of a three-way water flow channel. The three-way water outlet connector 71 is integrally formed with the right-side metal heat exchange body B1, resulting in fewer parts and higher production efficiency. The left water outlet receiving protrusion 706 and the left-side water outlet hole 707 are integrally formed with the left-side metal heat exchange body A1, resulting in fewer parts and higher production efficiency.

[0038] Preferably, the outer wall of the left metal heat exchanger body A1 is provided with two meandering and independent left water flow heat exchange channels 501 and 502. The two left water flow heat exchange channels 501 and 502 extend side by side. The outer wall of the left metal heat exchanger body A1 is sealed and fixedly connected with a left outer wall water tank cover plate A2 to cover the openings of the two left water flow heat exchange channels 501 and 502, so that the two left water flow heat exchange channels 501 and 502 form two independent left water flow heat exchange holes 51 and 52; the left water flow heat exchange channel 501 corresponds to the left water flow heat exchange hole 51, and the left water flow heat exchange channel 502 corresponds to the left water flow heat exchange hole 52.

[0039] The outer wall of the right-side metal heat exchanger body B1 is provided with two meandering and independent right-side water flow heat exchange channels 601 and 602. The two right-side water flow heat exchange channels 601 and 602 extend side by side. The outer wall of the right-side metal heat exchanger body B1 is sealed and fixedly connected with a right outer wall water tank cover plate B2, which covers the openings of the two right-side water flow heat exchange channels 601 and 602, so that the two right-side water flow heat exchange channels 601 and 602 form two independent right-side water flow heat exchange holes 61 and 62. The right-side water flow heat exchange channel 601 corresponds to the right-side water flow heat exchange hole 61, and the right-side water flow heat exchange channel 602 corresponds to the right-side water flow heat exchange hole 62.

[0040] The above system can heat two water lines simultaneously, forming two separate water lines for heating, allowing users to choose which to use. Alternatively, one water line can be used for heating, while the other can be used for heating domestic water.

[0041] The three-way water inlet device 4 includes a first water inlet three-way connector 4A and a second water inlet three-way connector 4B; the inner wall of the first water inlet three-way connector 4A has a first inner water inlet through hole 4A1; the inner wall of the second water inlet three-way connector 4B has a second inner water inlet through hole 4B1; the first water inlet three-way connector 4A is integrally connected to the left metal heat exchange body A1, one of the first water inlet three-way connector 4A is the first external water inlet 4A2, and the other two are directly connected to the water inlet end of the corresponding left water flow heat exchange channel 501. The second inner inlet hole 4B1 of the tee and the second inlet tee connector 4B are sealed and connected to the corresponding right-side water flow heat exchange channel 601; the second inlet tee connector 4B is integrally connected to the right-side metal heat exchange body B1; one of the two ends of the second inlet tee connector 4B is the second external water inlet 4B2; the other end is directly connected to the inlet end of the right-side water flow heat exchange channel 602; and the tee is sealed and connected to the first inner inlet hole 4A1 of the inner wall of the first inlet tee connector 4A, which is connected to the other left-side water flow heat exchange channel 502.

[0042] That is: the first water inlet tee connector 4A includes a first water inlet protrusion 4A3, a first external water inlet short pipe connector 4A4, a first internal water distribution short pipe connector 4A5, and a first internal water inlet through hole 4A1; the first water inlet protrusion 4A3 is integrally connected to the left metal heat exchange body A1, the outer wall of the first water inlet protrusion 4A3 extends to connect to the first external water inlet short pipe connector 4A4, the first external water inlet short pipe connector 4A4 is provided with a first external water inlet 4A2 in the middle, the inner side wall of the first water inlet protrusion 4A3 is provided with a first internal water inlet through hole 4A1, the first internal water inlet through hole 4A1 is connected to the corresponding left water flow heat exchange channel 502, and the internal tee junction between the first external water inlet short pipe connector 4A4 and the first internal water distribution short pipe connector 4A5 is connected to the water inlet end of another left water flow heat exchange channel 501;

[0043] The second water inlet tee connector 4B includes a second water inlet protrusion 4B3, a second external water inlet short pipe connector 4B4, a second internal water distribution short pipe connector 4B5, and a second internal water inlet through hole 4B1. The second water inlet protrusion 4B3 is integrally connected to the right metal heat exchange body B1. The outer wall of the second water inlet protrusion 4B3 extends to connect to the second external water inlet short pipe connector 4B4. The second external water inlet short pipe connector 4B4 has a second external water inlet 4B2 in the middle. The inner side wall of the second water inlet protrusion 4B3 has a second internal water inlet through hole 4B1, which is connected to the corresponding right water flow heat exchange channel 601. The internal tee junction between the second external water inlet short pipe connector 4B4 and the second internal water distribution short pipe connector 4B5 is connected to the water inlet end of another right water flow heat exchange channel 602.

[0044] The first internal water distribution short pipe joint 4A5 is tightly inserted into the second internal water inlet through hole 4B1 to connect the right water flow heat exchange through hole 61. A high-temperature resistant rubber sealing ring is clamped between the second internal water inlet through hole 4B1 and the first internal water distribution short pipe joint 4A5 or a high-temperature resistant sealant is used to seal and prevent water leakage.

[0045] The second internal water distribution short pipe joint 4B5 is tightly inserted into the first internal water inlet through hole 4A1 to connect the left water flow heat exchange through hole 52. A high-temperature resistant rubber sealing ring is clamped between the first internal water inlet through hole 4A1 and the second internal water distribution short pipe joint 4B5 or a high-temperature resistant sealant is used to seal and prevent water leakage.

[0046] The three-way water outlet device 7 includes a first water outlet three-way connector 7A and a second water outlet three-way connector 7B; the inner wall of the first water outlet three-way connector 7A has a first internal water outlet through hole 7A1; the inner wall of the second water outlet three-way connector 7B has a second internal water outlet through hole 7B1; the first water outlet three-way connector 7A is integrally connected to the left metal heat exchange body A1, and one of the two channels of the first water outlet three-way connector 7A is the first external water outlet 7A2, and the other two channels are connected to the first water inlet three-way connector. The left side water flow heat exchange through hole 52 of the 4A two-way valve, the three-way valve and the second inner water outlet through hole 7B1 of the second water outlet three-way connector 7B are sealed and connected; the second water outlet three-way connector 7B is integrally connected to the right side metal heat exchange body B1, one of the two-way valves of the second water outlet three-way connector 7B is the second external water outlet 7B2, the two-way valve and the right side water flow heat exchange through hole 61 of the two-way valve connected to the second water inlet three-way connector 4B, the three-way valve and the first inner water outlet through hole 7A1 of the first water outlet three-way connector 7A are sealed and connected;

[0047] That is: the first outlet tee connector 7A includes a first outlet protrusion 7A3, a first outlet short pipe connector 7A4, a first inner water confluence short pipe connector 7A5, and a first inner outlet through hole 7A1; the outer side wall of the first outlet protrusion 7A3 is integrally connected to the first outlet short pipe connector 7A4, the inner side wall of the first outlet protrusion 7A3 is integrally connected to the first inner water confluence short pipe connector 7A5, and the inner side wall of the first outlet protrusion 7A3 is integrally provided with the first inner outlet through hole 7A1; the intersection of the three internal tee joints of the first outlet short pipe connector 7A4 and the first inner water confluence short pipe connector 7A5 serves as a two-way connector and is connected to the left water flow heat exchange through hole 52 of the first inlet tee connector 4A; the first outlet short pipe connector 7A4 has a first external water outlet 7A2 in the middle as a one-way connector, and the first inner water confluence short pipe connector 7A5 serves as a three-way connector;

[0048] The second outlet tee connector 7B includes a second outlet protrusion 7B3, a second outlet short pipe connector 7B4, a second inner water confluence short pipe connector 7B5, and a second inner outlet through hole 7B1. The outer wall of the second outlet protrusion 7B3 is integrally connected to the second outlet short pipe connector 7B4, and the inner wall of the second outlet protrusion 7B3 is integrally connected to the second inner water confluence short pipe connector 7B5. The inner wall of the second outlet protrusion 7B3 is integrally provided with the second inner outlet through hole 7B1. The intersection of the two tee connectors of the second outlet short pipe connector 7B4 and the second inner water confluence short pipe connector 7B5 serves as a two-way connector and is connected to the right water flow heat exchange through hole 61 of the second inlet tee connector 4B. The middle of the second outlet short pipe connector 7B4 is provided with a second external outlet 7B2 as a one-way connector, and the second inner water confluence short pipe connector 7B5 serves as a three-way connector.

[0049] The first inner water junction short pipe joint 7A5 is tightly inserted into the second inner water outlet through hole 7B1 to connect the right side water flow heat exchange through hole 62. A high-temperature resistant rubber sealing ring is clamped between them or a high-temperature resistant sealant is used to seal and prevent water leakage.

[0050] The second inner water junction short pipe joint 7B5 is tightly inserted into the first inner water outlet through hole 7A1 to connect with the left water flow heat exchange through hole 51. A high-temperature resistant rubber sealing ring is clamped between them or a high-temperature resistant sealant is used to seal and prevent water leakage.

[0051] Preferably, the bottom of the right-side water flow heat exchange channel 601 has a heat exchange plate 601A that extends and meanders along the flow channel, providing a larger heat exchange area and improving heat exchange efficiency.

[0052] Preferably, the left-side metal heat exchange shell A is sealed and fixedly connected to the electronic anode rod 8, and the electronic anode rod 8 is inserted into the left-side water flow heat exchange through hole 51 (that is, a left rod hole is opened in the left-side metal heat exchange shell A, the electronic anode rod 8 passes through the left rod hole into the left-side water flow heat exchange through hole 51, and the base of the electronic anode rod 8 is sealed and fixedly connected to the left-side metal heat exchange shell A with a nut assembly and a rubber ring); the electronic anode rod 8 can inhibit the growth of scale, inhibit the growth of scale on the inner wall of the water channel, and prevent the water channel from narrowing and obstructing water flow.

[0053] Alternatively, the right-side metal heat exchange shell B is sealed and fixedly connected to the electronic anode rod, which is inserted into the right-side water flow heat exchange through hole 61 (i.e., a right rod hole is opened in the right-side metal heat exchange shell B, the electronic anode rod passes through the right rod hole into the right-side water flow heat exchange through hole 61, and the base of the electronic anode rod is sealed and fixedly connected to the right-side metal heat exchange shell B with a nut assembly and a rubber ring); the electronic anode rod can inhibit the growth of scale, inhibit the growth of scale on the inner wall of the water channel, and prevent the water channel from narrowing and obstructing water flow.

[0054] Preferably, the heat exchanger is of the inverted type; the top opening of the combustion heat exchange channel 2 is the combustion port 1, and the bottom opening is the exhaust port 3, which improves the heat utilization rate and the heat exchange effect.

[0055] Preferably, the bottom of the combustion heat exchange channel 2 has a smoke collection chamber 31, and the side wall of the heat exchanger has a smoke exhaust port 3. A smoke exhaust pipe is connected to the side wall, and the combustion port 1, the combustion heat exchange channel 2, the smoke collection chamber 31, and the smoke exhaust port 3 are connected in sequence.

[0056] Preferably, the inner walls of the left half heat exchange channel 21 and the right half heat exchange channel 22 are extended with several vertical heat-absorbing plates 201 with a thickness of 1 to 2 mm. The heat flow gap between the heat-absorbing plates has a width of 2 to 4 mm, which increases the heat absorption area and improves the heat exchange efficiency and effect.

[0057] Preferably, the inner walls of the left half heat exchange channel 21 and the right half heat exchange channel 22 are extended with several vertical heat-absorbing small protrusions 202 with a diameter of 2 to 3 mm. The heat flow gap between the heat-absorbing small protrusions 202 is 2 to 4 mm wide, which increases the heat absorption area and improves the heat exchange efficiency and effect.

[0058] Specific structural embodiment 1:

[0059] like Figures 1 to 8The diagram shows a high-efficiency heat exchanger with double-sided heating, belonging to a gas-fired water heater component (e.g., a gas water heater component). The heat exchanger is made of metal, and a combustion heat exchange channel 2 is provided in the middle of the heat exchanger. One end of the combustion heat exchange channel 2 is a combustion port 1, and the other end is a flue gas outlet 3. The combustion heat exchange channel 2 is flat. The high-efficiency heat exchanger also includes a three-way water inlet device 4, an independent left-side water flow heat exchange through-hole 51, an independent right-side water flow heat exchange through-hole 61, and a three-way water outlet device 7. A left-side water flow heat exchange through-hole is provided inside the left side wall of the heat exchanger. Hole 51, a right-side water flow heat exchange through hole 61 is opened in the right side wall of the heat exchanger; the left-side water flow heat exchange through hole 51 and the right-side water flow heat exchange through hole 61 are bare water channels; the water inlet end of the left-side water flow heat exchange through hole 51 and the right-side water flow heat exchange through hole 61 is provided with a three-way water inlet device 4, which is connected in parallel with the left-side water flow heat exchange through hole 51 and the right-side water flow heat exchange through hole 61; the water outlet end of the left-side water flow heat exchange through hole 51 and the right-side water flow heat exchange through hole 61 is provided with a three-way water outlet device 7, which is connected in parallel with the left-side water flow heat exchange through hole 51 and the right-side water flow heat exchange through hole 61.

[0060] The high-efficiency heat exchanger includes a left metal heat exchange shell A and a right metal heat exchange shell B. The inner wall of the left metal heat exchange shell A has a left water flow heat exchange through hole 51, and the inner wall of the right metal heat exchange shell B has a right water flow heat exchange through hole 61. The inner side wall of the left metal heat exchange shell A has a left half heat exchange channel 21, and the inner side wall of the right metal heat exchange shell B has a right half heat exchange channel 22. The left metal heat exchange shell A and the right metal heat exchange shell B are sealed and fixedly connected. The left half heat exchange channel 21 and the right half heat exchange channel 22 form a complete combustion heat exchange channel 2. A three-way water inlet device 4 is connected to the left metal heat exchange shell A and / or the right metal heat exchange shell B, and a three-way water outlet device 7 is connected to the left metal heat exchange shell A and / or the right metal heat exchange shell B.

[0061] The left-side metal heat exchange shell A includes a left-side metal heat exchange body A1 and a left-side outer wall water tank cover plate A2. The outer wall of the left-side metal heat exchange body A1 has a meandering left-side water flow heat exchange channel 501. The outer wall of the left-side metal heat exchange body A1 is sealed and fixedly connected to the left-side outer wall water tank cover plate A2, so that the left-side water flow heat exchange channel 501 becomes a left-side water flow heat exchange through hole 51. The inner wall of the left-side metal heat exchange body A1 has a left half heat exchange channel 21.

[0062] The right-side metal heat exchange shell B includes a right-side metal heat exchange body B1 and a right-side outer wall water tank cover plate B2. The outer wall of the right-side metal heat exchange body B1 has a meandering right-side water flow heat exchange channel 601. The right-side outer wall water tank cover plate B2 is sealed and fixedly connected to the outer wall of the right-side metal heat exchange body B1 to cover the channel opening, so that the right-side water flow heat exchange channel 601 becomes a right-side water flow heat exchange through hole 61. The inner wall of the right-side metal heat exchange body B1 has a right half heat exchange channel 22.

[0063] The left metal heat exchanger body A1 and the right metal heat exchanger body B1 are sealed and fixedly connected; the left metal heat exchanger body A1 and the right metal heat exchanger body B1 are made of aluminum.

[0064] A three-way water inlet device 4 is connected to the left metal heat exchanger body A1 and / or the right metal heat exchanger body B1, and a three-way water outlet device 7 is connected to the left metal heat exchanger body A1 and / or the right metal heat exchanger body B1.

[0065] The three-way water inlet device 4 is a three-way water inlet connector 41. The three-way water inlet connector 41 is integrally connected to the right metal heat exchange body B1. One of the three-way water inlet connector 41 is an external water inlet 401, the second is directly connected to the water inlet end of the right water flow heat exchange through hole 61, and the third is sealed and connected to the water inlet end of the left water flow heat exchange through hole 51.

[0066] The three-way water outlet device 7 is a three-way water outlet connector 71. The three-way water outlet connector 71 is integrally connected to the right metal heat exchange body B1. One of the three-way water outlet connector 71 is an outlet 701, the second is directly connected to the outlet end of the right water flow heat exchange through hole 61, and the third is sealed and connected to the outlet end of the left water flow heat exchange through hole 51.

[0067] Specific structural embodiment 2:

[0068] like Figures 9-16The diagram shows a high-efficiency heat exchanger with double-sided heating, belonging to a gas-fired water heater component (e.g., a gas water heater component). The heat exchanger is made of metal, and a combustion heat exchange channel 2 is provided in the middle of the heat exchanger. One end of the combustion heat exchange channel 2 is a combustion port 1, and the other end is a flue gas outlet 3. The combustion heat exchange channel 2 is flat. The high-efficiency heat exchanger also includes a three-way water inlet device 4, an independent left-side water flow heat exchange through-hole 51, an independent right-side water flow heat exchange through-hole 61, and a three-way water outlet device 7. A left-side water flow heat exchange through-hole is provided inside the left side wall of the heat exchanger. Hole 51, a right-side water flow heat exchange through hole 61 is opened in the right side wall of the heat exchanger; the left-side water flow heat exchange through hole 51 and the right-side water flow heat exchange through hole 61 are bare water channels; the water inlet end of the left-side water flow heat exchange through hole 51 and the right-side water flow heat exchange through hole 61 is provided with a three-way water inlet device 4, which is connected in parallel with the left-side water flow heat exchange through hole 51 and the right-side water flow heat exchange through hole 61; the water outlet end of the left-side water flow heat exchange through hole 51 and the right-side water flow heat exchange through hole 61 is provided with a three-way water outlet device 7, which is connected in parallel with the left-side water flow heat exchange through hole 51 and the right-side water flow heat exchange through hole 61.

[0069] The high-efficiency heat exchanger includes a left metal heat exchange shell A and a right metal heat exchange shell B. The inner wall of the left metal heat exchange shell A has a left water flow heat exchange through hole 51, and the inner wall of the right metal heat exchange shell B has a right water flow heat exchange through hole 61. The inner side wall of the left metal heat exchange shell A has a left half heat exchange channel 21, and the inner side wall of the right metal heat exchange shell B has a right half heat exchange channel 22. The left metal heat exchange shell A and the right metal heat exchange shell B are sealed and fixedly connected. The left half heat exchange channel 21 and the right half heat exchange channel 22 form a complete combustion heat exchange channel 2. A three-way water inlet device 4 is connected to the left metal heat exchange shell A and / or the right metal heat exchange shell B, and a three-way water outlet device 7 is connected to the left metal heat exchange shell A and / or the right metal heat exchange shell B.

[0070] The left-side metal heat exchange shell A includes a left-side metal heat exchange body A1 and a left-side outer wall water tank cover plate A2; the inner wall of the left-side metal heat exchange body A1 is provided with a left half heat exchange channel 21;

[0071] The right-side metal heat exchange shell B includes a right-side metal heat exchange body B1 and a right-side outer wall water tank cover plate B2; the inner wall of the right-side metal heat exchange body B1 is provided with a right half heat exchange channel 22.

[0072] The left metal heat exchanger body A1 and the right metal heat exchanger body B1 are sealed and fixedly connected; the left metal heat exchanger body A1 and the right metal heat exchanger body B1 are made of aluminum.

[0073] A three-way water inlet device 4 is connected to the left metal heat exchanger body A1 and the right metal heat exchanger body B1, and a three-way water outlet device 7 is connected to the left metal heat exchanger body A1 and the right metal heat exchanger body B1.

[0074] The outer wall of the left metal heat exchanger body A1 is provided with two meandering and independent left water flow heat exchange channels 501 and 502. The two left water flow heat exchange channels 501 and 502 extend side by side. The outer wall of the left metal heat exchanger body A1 is sealed and fixedly connected with a left outer wall water tank cover plate A2, which covers the openings of the two left water flow heat exchange channels 501 and 502, so that the two left water flow heat exchange channels 501 and 502 form two independent left water flow heat exchange holes 51 and 52. The left water flow heat exchange channel 501 corresponds to the left water flow heat exchange hole 51, and the left water flow heat exchange channel 502 corresponds to the left water flow heat exchange hole 52.

[0075] The outer wall of the right-side metal heat exchanger body B1 is provided with two meandering and independent right-side water flow heat exchange channels 601 and 602. The two right-side water flow heat exchange channels 601 and 602 extend side by side. The outer wall of the right-side metal heat exchanger body B1 is sealed and fixedly connected with a right outer wall water tank cover plate B2, which covers the openings of the two right-side water flow heat exchange channels 601 and 602, so that the two right-side water flow heat exchange channels 601 and 602 form two independent right-side water flow heat exchange holes 61 and 62. The right-side water flow heat exchange channel 601 corresponds to the right-side water flow heat exchange hole 61, and the right-side water flow heat exchange channel 602 corresponds to the right-side water flow heat exchange hole 62.

[0076] The three-way water inlet device 4 includes a first water inlet three-way connector 4A and a second water inlet three-way connector 4B; the inner wall of the first water inlet three-way connector 4A has a first inner water inlet through hole 4A1; the inner wall of the second water inlet three-way connector 4B has a second inner water inlet through hole 4B1; the first water inlet three-way connector 4A is integrally connected to the left metal heat exchange body A1, one of the first water inlet three-way connector 4A is the first external water inlet 4A2, and the other two are directly connected to the water inlet end of the corresponding left water flow heat exchange channel 501. The second inner inlet hole 4B1 of the tee and the second inlet tee connector 4B are sealed and connected to the corresponding right-side water flow heat exchange channel 601; the second inlet tee connector 4B is integrally connected to the right-side metal heat exchange body B1; one of the two ends of the second inlet tee connector 4B is the second external water inlet 4B2; the other end is directly connected to the inlet end of the right-side water flow heat exchange channel 602; and the tee is sealed and connected to the first inner inlet hole 4A1 of the inner wall of the first inlet tee connector 4A, which is connected to the other left-side water flow heat exchange channel 502.

[0077] The three-way water outlet device 7 includes a first water outlet three-way connector 7A and a second water outlet three-way connector 7B; the inner wall of the first water outlet three-way connector 7A has a first internal water outlet through hole 7A1; the inner wall of the second water outlet three-way connector 7B has a second internal water outlet through hole 7B1; the first water outlet three-way connector 7A is integrally connected to the left metal heat exchange body A1, and one of the two channels of the first water outlet three-way connector 7A is the first external water outlet 7A2, and the other two channels are connected to the first water inlet three-way connector. The left side water flow heat exchange through hole 52 of the 4A two-way valve, the three-way valve and the second inner water outlet through hole 7B1 of the second water outlet three-way connector 7B are sealed and connected; the second water outlet three-way connector 7B is integrally connected to the right side metal heat exchange body B1, one of the two-way valves of the second water outlet three-way connector 7B is the second external water outlet 7B2, the two-way valve and the right side water flow heat exchange through hole 61 of the two-way valve connected to the second water inlet three-way connector 4B, the three-way valve and the first inner water outlet through hole 7A1 of the first water outlet three-way connector 7A are sealed and connected.

Claims

1. A high-efficiency heat exchanger with double-sided heating, belonging to water heater components, wherein the heat exchanger is made of metal, and a combustion heat exchange channel is provided in the middle of the heat exchanger, one end of the combustion heat exchange channel being a combustion port and the other end being a flue gas outlet, wherein the combustion heat exchange channel is flat; characterized in that: The high-efficiency heat exchanger also includes a three-way water inlet device, at least one independent left-side water flow heat exchange through-hole, at least one independent right-side water flow heat exchange through-hole, and a three-way water outlet device; a left-side water flow heat exchange through-hole is opened in the left side wall of the heat exchanger, and a right-side water flow heat exchange through-hole is opened in the right side wall of the heat exchanger; the left-side water flow heat exchange through-hole and the right-side water flow heat exchange through-hole are bare water channels; The inlet ends of the left and right water flow heat exchange passages are equipped with three-way water inlet devices, which are connected in parallel with the left and right water flow heat exchange passages; the outlet ends of the left and right water flow heat exchange passages are equipped with three-way water outlet devices, which are connected in parallel with the left and right water flow heat exchange passages.

2. The high-efficiency heat exchanger with double-sided heating according to claim 1, characterized in that: The high-efficiency heat exchanger includes a left metal heat exchange shell and a right metal heat exchange shell. The inner wall of the left metal heat exchange shell has a left water flow heat exchange through hole, and the inner wall of the right metal heat exchange shell has a right water flow heat exchange through hole. The inner side wall of the left metal heat exchange shell has a left half heat exchange channel, and the inner side wall of the right metal heat exchange shell has a right half heat exchange channel. The left and right metal heat exchange shells are sealed and fixedly connected. The left half heat exchange channel and the right half heat exchange channel form a complete combustion heat exchange channel. A three-way water inlet device is connected to the left metal heat exchange shell and / or the right metal heat exchange shell, and a three-way water outlet device is connected to the left metal heat exchange shell and / or the right metal heat exchange shell.

3. A high-efficiency heat exchanger with double-sided heating according to claim 2, characterized in that: The left-side metal heat exchange shell includes a left-side metal heat exchange body and a left-side outer wall water tank cover plate. The outer wall of the left-side metal heat exchange body is provided with a meandering left-side water flow heat exchange channel. The outer wall of the left-side metal heat exchange body is sealed and fixedly connected to the left-side outer wall water tank cover plate, so that the left-side water flow heat exchange channel becomes a left-side water flow heat exchange through hole. The inner wall of the left-side metal heat exchange body is provided with a left half heat exchange channel. The right-side metal heat exchange shell includes a right-side metal heat exchange body and a right outer wall water tank cover plate. The outer wall of the right-side metal heat exchange body has a meandering right-side water flow heat exchange channel. The right outer wall water tank cover plate is sealed and fixedly connected to the outer wall of the right-side metal heat exchange body to cover the slot opening, so that the right-side water flow heat exchange channel becomes a right-side water flow heat exchange through hole. The inner wall of the right-side metal heat exchange body has a right half heat exchange channel. The left and right metal heat exchanger bodies are sealed and fixedly connected; both the left and right metal heat exchanger bodies are made of aluminum. A three-way water inlet device is connected to the left metal heat exchanger body and / or the right metal heat exchanger body, and a three-way water outlet device is connected to the left metal heat exchanger body and / or the right metal heat exchanger body.

4. A high-efficiency heat exchanger with double-sided heating according to claim 3, characterized in that: The three-way water inlet device is a three-way water inlet connector. The three-way water inlet connector is integrally connected to the right metal heat exchange body. One of the three-way water inlet connectors is an external water inlet, the second is directly connected to the water inlet end of the right water flow heat exchange through hole, and the third is sealed and connected to the water inlet end of the left water flow heat exchange through hole.

5. A high-efficiency heat exchanger with double-sided heating according to claim 3 or 4, characterized in that: The three-way water outlet device is a three-way water outlet connector. The three-way water outlet connector is integrally connected to the right metal heat exchange body. One of the three-way water outlet connectors is the water outlet for going out, the second is directly connected to the water outlet end of the right water flow heat exchange through hole, and the third is sealed and connected to the water outlet end of the left water flow heat exchange through hole.

6. A high-efficiency heat exchanger with double-sided heating according to claim 3, characterized in that: The outer wall of the left-side metal heat exchanger body (A1) is provided with two meandering and independent left-side water flow heat exchange channels (501, 502). The two left-side water flow heat exchange channels (501, 502) extend side by side. The outer wall of the left-side metal heat exchanger body (A1) is sealed and fixedly connected with a left outer wall water tank cover plate (A2) to cover the openings of the two left-side water flow heat exchange channels (501, 502), so that the two left-side water flow heat exchange channels (501, 502) form two independent left-side water flow heat exchange holes (51, 52). The left-side water flow heat exchange channel (501) corresponds to the left-side water flow heat exchange hole (51), and the left-side water flow heat exchange channel (502) corresponds to the left-side water flow heat exchange hole (52). The outer wall of the right-side metal heat exchange body ((B1)) is provided with two meandering and independent right-side water flow heat exchange channels (601, 602). The two right-side water flow heat exchange channels (601, 602) extend side by side. The outer wall of the right-side metal heat exchange body (B1) is sealed and fixedly connected with a right outer wall water tank cover plate (B2) to cover the openings of the two right-side water flow heat exchange channels (601, 602), so that the two right-side water flow heat exchange channels (601, 602) form two independent right-side water flow heat exchange holes (61, 62). The right-side water flow heat exchange channel (601) corresponds to the right-side water flow heat exchange hole (61), and the right-side water flow heat exchange channel (602) corresponds to the right-side water flow heat exchange hole (62). The three-way water inlet device (4) includes a first water inlet three-way connector (4A) and a second water inlet three-way connector (4B); the inner wall of the first water inlet three-way connector (4A) is provided with a first internal water inlet hole 4 (A1); the inner wall of the second water inlet three-way connector (4B) is provided with a second internal water inlet hole (4B1); the first water inlet three-way connector (4A) is integrally connected to the left metal heat exchange body (A1), one of the first water inlet three-way connector (4A) is the first external water inlet (4A2), and the other two are directly connected to the water inlet end of the corresponding left water flow heat exchange channel (501). The second inner water inlet hole (4B1) of the tee and the second water inlet tee connector 4B is sealed and connected to the corresponding right-side water flow heat exchange channel (601); the second water inlet tee connector (4B) is integrally connected to the right-side metal heat exchange body (B1); one of the two ends of the second water inlet tee connector (4B) is the second external water inlet (4B2); the other end is directly connected to the water inlet end of the right-side water flow heat exchange channel (602); the tee and the first inner water inlet hole (4A1) of the inner wall of the first water inlet tee connector (4A) are sealed and connected to the other left-side water flow heat exchange channel (502); The three-way water outlet device (7) includes a first water outlet three-way connector (7A) and a second water outlet three-way connector (7B); the inner wall of the first water outlet three-way connector (7A) is provided with a first internal water outlet through hole (7A1); the inner wall of the second water outlet three-way connector (7B) is provided with a second internal water outlet through hole (7B1); the first water outlet three-way connector (7A) is integrally connected to the left side metal heat exchange body (A1), one of the first water outlet three-way connectors (7A) is the first external water outlet (7A2), and the second one is connected to the first water inlet three-way connector (7A2). 4A) The left side water flow heat exchange through hole (52) of the two-way valve, the two-way valve and the second inner water outlet through hole (7B1) of the second water outlet three-way connector (7B) are sealed and connected; the second water outlet three-way connector (7B) is integrally connected to the right side metal heat exchange body (B1), one of the two-way valves of the second water outlet three-way connector (7B) is the second external water outlet (7B2), the two-way valve and the right side water flow heat exchange through hole (61) of the two-way valve of the second water inlet three-way connector (4B), the three-way valve and the first inner water outlet through hole (7A1) of the first water outlet three-way connector (7A) are sealed and connected.

7. A high-efficiency heat exchanger with double-sided heating according to claim 3, characterized in that: The bottom of the right-side water flow heat exchange channel has a protruding heat exchange fin that extends and meanders along the flow channel.

8. A high-efficiency heat exchanger with double-sided heating according to claim 3, characterized in that: The left metal heat exchange shell is sealed and fixedly connected to the electronic anode rod, which is inserted into the left water flow heat exchange through hole; or, the right metal heat exchange shell is sealed and fixedly connected to the right electronic anode rod, which is inserted into the right water flow heat exchange through hole.

9. A high-efficiency heat exchanger with double-sided heating according to claim 3, characterized in that: The heat exchanger is of the inverted type; the top opening of the combustion heat exchange channel is the combustion port, and the bottom opening is the exhaust port.

10. A high-efficiency heat exchanger with double-sided heating according to claim 3, characterized in that: The inner walls of both the left and right half of the heat exchange channel are extended with several vertical heat-absorbing plates or small heat-absorbing protrusions.

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