Heat exchange device and water heater applying same

Abstract

The utility model provides a heat exchange device and a water heater using the same. The heat exchange device comprises a water inlet header pipe. The water outlet main pipe and the water inlet main pipe are oppositely arranged at intervals; the air inlet manifold is arranged on one side of the water outlet manifold opposite to the water inlet manifold; the air return header pipe is arranged on one side of the water inlet header pipe opposite to the water outlet header pipe; the water conveying outer pipes are connected between the water inlet main pipe and the water outlet main pipe at intervals; and the heat exchange inner pipes are arranged in the water conveying outer pipes in a penetrating mode, one ends of the heat exchange inner pipes penetrate through the water inlet main pipe and are connected to the air return main pipe, and the other opposite ends of the heat exchange inner pipes penetrate through the water outlet main pipe and are connected to the air inlet main pipe. The heat exchange device can flexibly adjust the number of the inner and outer sleeve branches according to the heating capacity of the heat pump water heater so as to adjust the heat exchange capacity of the heat exchanger in a matched mode. Meanwhile, the outer-layer plastic water delivery outer pipe can shrink and deform to protect the inner-layer heat exchange inner pipe after being frozen, the inner-layer heat exchange inner pipe is easily heated to restore after being unfrozen, the frost crack resistance of the inner-layer sleeve and the outer-layer sleeve is improved, the maintenance cost of the heat exchange device is reduced, and the reliability of the heat exchange device is improved.

Description

Technical Field

[0001] This utility model relates to the field of air source heat pump water heater technology, and in particular to a heat exchange device and a water heater using the same. Background Technology

[0002] Currently, most air source heat pump water heaters on the market use shell-and-tube or plate heat exchangers on the water circulation loop side. Both the water-side pipes for transporting the water medium and the refrigerant-side pipes for transporting the refrigerant (usually fluorides) are made of metal, increasing the cost of the heat exchangers. Furthermore, metal pipes have poor resistance to deformation in cold winters, and once deformed by freezing, they cannot recover, leading to further deformation or cracking. Additionally, traditional shell-and-tube heat exchangers typically feature spirally extending inner and outer tubes, with two flow-diverting structures at each end to separate the different media within the inner and outer tubes. This type of shell-and-tube heat exchanger can only adjust its heating capacity by changing the extension length of the inner and outer tubes, and cannot flexibly adjust the number of pipe branches to adapt to different heating capacities of the heat pump water heater. Utility Model Content

[0003] This utility model proposes a heat exchange device and a water heater using the same, in order to solve the technical problem that the water-side heat exchanger of a traditional air source heat pump water heater cannot flexibly adjust the number of its branch pipes according to the different heating capacities of the water heater.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0005] This utility model provides a heat exchange device, comprising:

[0006] Main inlet pipe;

[0007] The main outlet pipe is installed at an interval relative to the main inlet pipe;

[0008] The air intake manifold is located on the side of the water outlet manifold opposite to the water inlet manifold.

[0009] The return air main is located on the side of the inlet main opposite to the outlet main;

[0010] Several external water supply pipes are connected at intervals between the inlet main pipe and the outlet main pipe;

[0011] Several heat exchange inner tubes are installed inside each water supply outer tube. One end of the heat exchange inner tube passes through the water inlet main pipe and is connected to the air return main pipe, while the other end of the heat exchange inner tube passes through the water outlet main pipe and is connected to the air inlet main pipe.

[0012] Preferably, a plurality of first outer pipe sleeves are provided at intervals on the side end of the inlet main pipe facing the outlet main pipe, and the inner diameter of the first outer pipe sleeves matches the outer diameter of the water delivery outer pipe.

[0013] Several second outer pipe sleeves are provided at intervals on one side of the outlet main pipe facing the inlet main pipe, each matching one of the first outer pipe sleeves. The inner diameter of the second outer pipe sleeve matches the outer diameter of the water supply outer pipe.

[0014] One end of the water supply pipe is inserted inside the first outer pipe sleeve, and the other end of the water supply pipe is inserted inside the second outer pipe sleeve.

[0015] Preferably, a plurality of first inner tube sleeves are provided at intervals on the other side of the inlet main pipe away from the outlet main pipe, each matching one-to-one with the first outer tube sleeve, and the inner diameter of the first inner tube sleeve matches the outer diameter of the heat exchange inner tube.

[0016] Several second inner tube sleeves are provided at intervals on the other side of the outlet main pipe away from the inlet main pipe, each matching one of the second outer tube sleeves. The inner diameter of the second inner tube sleeve matches the outer diameter of the heat exchange inner tube.

[0017] One end of the heat exchange inner tube passes through the first outer tube sleeve, the inside of the water inlet main pipe and the first inner tube sleeve and is connected to the return air main pipe. The other end of the heat exchange inner tube passes through the second outer tube sleeve, the inside of the water outlet main pipe and the second inner tube sleeve and is connected to the air inlet main pipe.

[0018] Furthermore, the heat exchange device also includes:

[0019] The first water pipe end cap is fitted onto one end of the main water inlet pipe to seal the corresponding end of the main water inlet pipe;

[0020] The second water pipe end cap is fitted onto the end of the main water outlet pipe opposite to the first water pipe end cap, and is used to seal the corresponding end of the main water outlet pipe.

[0021] Furthermore, the heat exchange device also includes:

[0022] The first set of tube caps includes a first cap bottom wall and a first cap retaining ring disposed around one side of the first cap bottom wall. The first cap bottom wall has a first inner tube through hole in the middle, which matches the shape of the heat exchange inner tube.

[0023] The second set of tube caps includes a second cap bottom wall and a second cap retaining ring arranged around one side of the second cap bottom wall. The second cap bottom wall has a second inner tube through hole in the middle, which matches the shape of the heat exchange inner tube.

[0024] The first inner tube through hole is sleeved on the part of the heat exchange inner tube located between the first inner tube sleeve and the return gas main pipe. The bottom wall of the first cap abuts against the end of the first inner tube sleeve away from the water inlet main pipe. The first cap retaining ring is sleeved on the outer side of the end of the first inner tube sleeve.

[0025] The second inner tube is sleeved through the hole to the part of the heat exchange inner tube located between the second inner tube sleeve and the air inlet main pipe. The bottom wall of the second cap abuts against the end of the second inner tube sleeve away from the water outlet main pipe. The second cap retaining ring is sleeved on the outer side of the end of the second inner tube sleeve.

[0026] Furthermore, the inner surface of the end of the first inner tube sleeve is provided with a first annular step, and the inner surface of the end of the second inner tube sleeve is provided with a second annular step. The heat exchange device also includes:

[0027] The first sealing ring is fitted onto the heat exchange inner tube and is located inside the first annular step, between the first inner tube sleeve and the first sleeve cap.

[0028] The second sealing ring is fitted onto the heat exchange inner tube and is located inside the second annular step, between the second inner tube sleeve and the second sleeve cap.

[0029] Preferably, the inner and / or outer surfaces of the first and second sealing rings are provided with annular ribs.

[0030] Preferably, the return gas main pipe is provided with a number of first inner tube interfaces at intervals on the side facing the intake gas main pipe, which are matched one by one with each of the first inner tube sleeves. The intake gas main pipe is provided with a number of second inner tube interfaces at intervals on the side facing the return gas main pipe, which are matched one by one with each of the second inner tube sleeves. One end of the heat exchange inner tube is connected to the first inner tube interface, and the other end of the heat exchange inner tube is connected to the second inner tube interface.

[0031] Preferably, the range of values ​​for the inner diameter of the outer pipe of the water supply pipe and the outer diameter of the inner pipe of the heat exchange pipe is as follows:

[0032] 3 × outer diameter of inner tube ≥ inner diameter of outer tube ≥ outer diameter of inner tube + 1.

[0033] Preferably, the outer water supply pipe is made of plastic, and the inner heat exchange pipe is made of metal.

[0034] This utility model also provides a water heater, including a refrigerant circulation pipeline and a water flow circulation pipeline, and also includes the aforementioned heat exchange device. The inlet main pipe and the outlet main pipe are respectively connected to the water flow circulation pipeline, and the gas inlet main pipe and the gas return main pipe are respectively connected to the refrigerant circulation pipeline.

[0035] Preferably, the water heater is an air source heat pump water heater.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] The heat exchange device provided by this utility model has multiple outer water pipes connected at intervals between relatively spaced inlet and outlet water mains. Multiple inner heat exchange pipes are correspondingly inserted into each outer water pipe. One end of each inner heat exchange pipe passes through the inlet water main and connects to the return gas main, while the opposite end passes through the outlet water main and connects to the inlet gas main. This allows the heat exchange device to flexibly adjust the number of branches of its inner and outer casing pipes according to the different heating capacities of the heat pump water heater, thus adapting to the heat exchanger's heat exchange capacity. Simultaneously, the outer water-side outer water pipes are made of PVC or PP-R plastic pipes, which reduces costs and facilitates replacement and maintenance. Furthermore, the plastic pipes have a certain degree of elasticity, allowing for expansion and contraction to a certain extent. This allows the outer plastic water-side outer pipes to protect the inner heat exchange inner pipes through contraction and deformation after freezing. After thawing, the outer plastic water-side outer pipes easily recover their original shape upon heating, thereby improving the freeze-thaw resistance of the inner and outer casings, reducing maintenance costs, and increasing reliability. Attached Figure Description

[0038] To more clearly illustrate the technical solution proposed by this utility model, a detailed description is provided below in conjunction with the embodiments and accompanying drawings. It should be understood that the accompanying drawings described below are merely some embodiments of this utility model, and those skilled in the art can make changes to these drawings under the concept of this utility model.

[0039] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the heat exchange device provided by this utility model;

[0040] Figure 2 A schematic front view of an embodiment of the water receiving tray provided by this utility model;

[0041] Figure 3 for Figure 2 A partial cross-sectional view of the heat exchange device along the AA direction;

[0042] Figure 4 for Figure 3 A magnified schematic diagram of the local structure of region B in the diagram;

[0043] Figure 5 for Figure 2 A partial cross-sectional view of the heat exchange device along the CC direction.

[0044] Figure 6 for Figure 5 A magnified schematic diagram of the local structure of region D in the diagram;

[0045] Figure 7 A side view of the first sealing ring of the heat exchange device provided by this utility model;

[0046] Figure 8 for Figure 7 A cross-sectional view of the first sealing ring along the EE direction;

[0047] Figure 9 A side view of the second type of first sealing ring for the heat exchange device provided by this utility model;

[0048] Figure 10 for Figure 9 A cross-sectional view of the first sealing ring along the FF direction;

[0049] Figure 11 A side view of the third type of first sealing ring for the heat exchange device provided by this utility model;

[0050] Figure 12 for Figure 11 A cross-sectional view of the first sealing ring along the GG direction.

[0051] The main markings in the attached figures are as follows:

[0052] 1. Main inlet pipe; 11. First outer pipe sleeve; 12. First inner pipe sleeve; 121. First annular step; 122. First sealing ring; 13. First water pipe end cap; 2. Main outlet pipe; 21. Second outer pipe sleeve; 22. Second inner pipe sleeve; 23. Second water pipe end cap; 3. Main air inlet pipe; 31. Second inner pipe interface; 4. Main air return pipe; 41. First inner pipe interface; 5. Outer water pipe; 6. Inner heat exchange pipe; 7. First sleeve cap; 71. Bottom wall of first cap; 711. First inner pipe through hole; 72. First cap retaining ring; 8. Second sleeve cap; 9. Annular rib.

[0053] Other markings in the diagram are as follows:

[0054] D1, Inner diameter of outer pipe; D2, Outer diameter of inner pipe; H, Water flow direction; I, Refrigerant flow direction. Detailed Implementation

[0055] To make the technical problem to be solved, the technical solution and the beneficial effects of this utility model clearer, the following description is provided in conjunction with the appendix. Figure 1-12 The present invention will be further described in detail with reference to the embodiments.

[0056] Please refer to the following: Figure 1-12 The heat exchange device provided by this utility model includes:

[0057] Water inlet main pipe 1; water outlet main pipe 2, which is set at intervals opposite to water inlet main pipe 1; air inlet main pipe 3, which is set on the side of water outlet main pipe 2 opposite to water inlet main pipe 1; air return main pipe 4, which is set on the side of water inlet main pipe 1 opposite to water outlet main pipe 2; several water supply external pipes 5, which are connected between water inlet main pipe 1 and water outlet main pipe 2 at intervals; several heat exchange internal pipes 6, which are correspondingly installed inside each water supply external pipe 5. One end of the heat exchange internal pipe 6 passes through water inlet main pipe 1 and is connected to air return main pipe 4, and the other end of the heat exchange internal pipe 6 passes through water outlet main pipe 2 and is connected to air inlet main pipe 3.

[0058] Please refer to the following: Figure 1-6 In this embodiment, the outlet main pipe 2 and the inlet main pipe 1 are arranged parallel to each other at intervals. The air inlet main pipe 3 is arranged at intervals on the side of the outlet main pipe 2 opposite to the inlet main pipe 1, and is arranged parallel to the outlet main pipe 2 and the inlet main pipe 1. The return air main pipe 4 is arranged at intervals on the side of the inlet main pipe 1 opposite to the outlet main pipe 2, and is arranged parallel to the outlet main pipe 2, the inlet main pipe 1, and the air inlet main pipe 3. There are multiple (three or more) water supply outer pipes 5, and the multiple water supply outer pipes 5 are vertically connected between the inlet main pipe 1 and the outlet main pipe 2 at intervals. The number of heat exchange inner pipes 6 matches the number of water supply outer pipes 5. Each heat exchange inner pipe 6 is arranged parallel to each water supply outer pipe 5. One end of the heat exchange inner pipe 6 passes vertically through the inlet main pipe 1 and is vertically connected to the return air main pipe 4. The other end of the heat exchange inner pipe 6 passes vertically through the outlet main pipe 2 and is vertically connected to the air inlet main pipe 3.

[0059] Please refer to the following: Figure 1-6 In a preferred embodiment, a plurality of first outer pipe sleeves 11 are provided at intervals on one side of the inlet main pipe 1 facing the outlet main pipe 2, and the inner diameter of the first outer pipe sleeve 11 matches the outer diameter of the water supply outer pipe 5; a plurality of second outer pipe sleeves 21 are provided at intervals on one side of the outlet main pipe 2 facing the inlet main pipe 1, which match each of the first outer pipe sleeves 11, and the inner diameter of the second outer pipe sleeve 21 matches the outer diameter of the water supply outer pipe 5.

[0060] One end of the water supply outer pipe 5 is inserted inside the first outer pipe sleeve 11, and the other end of the water supply outer pipe 5 is inserted inside the second outer pipe sleeve 21.

[0061] Please refer to the following: Figure 1-6 In a preferred embodiment, the inlet main pipe 1, facing away from the outlet main pipe 2, is provided with a plurality of first inner tube sleeves 12 that match each of the first outer tube sleeves 11 at intervals. The inner diameter of the first inner tube sleeve 12 matches the outer diameter of the heat exchange inner tube 6. The outlet main pipe 2, facing away from the inlet main pipe 1, is provided with a plurality of second inner tube sleeves 22 that match each of the second outer tube sleeves 21 at intervals. The inner diameter of the second inner tube sleeve 22 matches the outer diameter of the heat exchange inner tube 6.

[0062] One end of the heat exchange inner tube 6 passes through the inside of the first outer tube sleeve 11, the water inlet main pipe 1 and the first inner tube sleeve 12 and is connected to the return air main pipe 4. The other end of the heat exchange inner tube 6 passes through the inside of the second outer tube sleeve 21, the water outlet main pipe 2 and the second inner tube sleeve 22 and is connected to the air inlet main pipe 3.

[0063] Please refer to the following: Figure 1-6 In a preferred embodiment of this invention, the heat exchange device further includes:

[0064] The first water pipe end cap 13 is fitted onto one end of the inlet main pipe 1 to seal the corresponding end of the inlet main pipe 1; the second water pipe end cap 23 is fitted onto one end of the outlet main pipe 2 opposite to the first water pipe end cap 13 to seal the corresponding end of the outlet main pipe 2.

[0065] Please refer to the following: Figure 1-6 In a preferred embodiment of this invention, the heat exchange device further includes:

[0066] The first sleeve cap 7 includes a first cap bottom wall 71 and a first cap retaining ring 72 surrounding one side of the first cap bottom wall 71. The first cap bottom wall 71 has a first inner tube through hole 711 in the middle, the shape of which matches the outer shape of the heat exchange inner tube 6. The second sleeve cap 8 includes a second cap bottom wall and a second cap retaining ring surrounding one side of the second cap bottom wall. The second cap bottom wall has a second inner tube through hole in the middle, the shape of which matches the outer shape of the heat exchange inner tube 6. The structures of the second cap bottom wall, the second inner tube through hole, and the second cap retaining ring are similar to those of the first cap bottom wall 71, the first inner tube through hole 711, and the first cap retaining ring 72, respectively, and will not be described in detail here with reference to the accompanying drawings.

[0067] The first inner tube through hole 711 is sleeved on the part of the heat exchange inner tube 6 located between the first inner tube sleeve 12 and the return gas main pipe 4. The inner side wall of the bottom wall of the first cap abuts against the outer side wall of the end of the first inner tube sleeve 12 away from the water inlet main pipe 1. The inner surface of the first cap retaining ring 72 is sleeved on the outer side surface of the end of the first inner tube sleeve 12.

[0068] The second inner tube through hole is connected to the part of the heat exchange inner tube 6 located between the second inner tube sleeve 22 and the air inlet main pipe 3. The bottom wall of the second cap abuts against the end of the second inner tube sleeve 22 away from the water outlet main pipe 2. The inner surface of the second cap retaining ring is sleeved on the outer surface of the end of the second inner tube sleeve 22.

[0069] One end of the heat exchange inner tube 6 passes through the inside of the first outer tube sleeve 11, the water inlet main pipe 1, the first inner tube sleeve 12, and the first inner tube through hole 711 and is connected to the return air main pipe 4. The other end of the heat exchange inner tube 6 passes through the inside of the second outer tube sleeve 21, the water outlet main pipe 2, the second inner tube sleeve 22, and the second inner tube through hole and is connected to the air inlet main pipe 3.

[0070] Please refer to the following: Figure 1-6 As a preferred embodiment, the first inner tube through hole 711 and the heat exchange inner tube 6, the first cap bottom wall 71 and the first inner tube sleeve 12, the first cap retaining ring 72 and the first inner tube sleeve 12, the second inner tube through hole and the heat exchange inner tube 6, the second cap bottom wall and the second inner tube sleeve 22, and the second cap retaining ring and the second inner tube sleeve 22 are sealed by hot melt adhesive or glue bonding, clamp fastening, etc., so that the first sleeve cap 7 and the second sleeve cap 8 are respectively securely fastened and tightly sealed on the first inner tube sleeve 12 and the second inner tube sleeve 22.

[0071] Please refer to the following: Figure 1-6 In this embodiment, the inner side of the end of the first inner tube sleeve 12 is provided with a first annular step 121, and the inner side of the end of the second inner tube sleeve 22 is provided with a second annular step. The structure of the second annular step is similar to that of the first annular step 121, and will not be described in detail here.

[0072] The heat exchange device also includes:

[0073] The first sealing ring 122 is fitted onto the heat exchange inner tube 6 and is located inside the first annular step 121, between the first inner tube sleeve 12 and the first sleeve cap 7; the second sealing ring is fitted onto the heat exchange inner tube 6 and is located inside the second annular step, between the second inner tube sleeve 22 and the second sleeve cap 8. The structure of the second sealing ring is similar to that of the first sealing ring 122, and will not be described in detail here with reference to the attached drawings.

[0074] The first annular step 121 and the second annular step respectively restrict the movement of the first sealing ring 122 and the second sealing ring along the outer surface of the heat exchange inner tube 6 towards the water inlet main pipe 1 and the water outlet main pipe 2, thereby preventing the first sealing ring 122 and the second sealing ring from entering the water inlet main pipe 1 and the water outlet main pipe 2 separately through the first inner tube sleeve 12 and the second inner tube sleeve 22, which would cause the seal to fail.

[0075] Please refer to the following: Figure 7 , 8 In this embodiment, the first sealing ring 122 and the second sealing ring can be O-rings in the shape of a ring.

[0076] Please refer to the following: Figure 7-12 As a preferred embodiment of this invention, the inner and / or outer surfaces of the first sealing ring 122 and the second sealing ring are provided with annular ribs 9.

[0077] Please refer to the following: Figure 9 , 10In a more preferred embodiment, the inner surfaces of the first sealing ring 122 and the second sealing ring are provided with a plurality of annular ribs 9 at intervals. The annular ribs 9 contact the heat exchange inner tube 6 to achieve a sealing effect on the end ports of the first inner tube sleeve 12 and the second inner tube sleeve 22, thereby preventing water from overflowing from the inlet main pipe 1 and the outlet main pipe 2 through the first inner tube sleeve 12 and the second inner tube sleeve 22 into the heat exchange device.

[0078] Please refer to the following: Figure 11 , 12 In another preferred embodiment, the inner and outer surfaces of the first sealing ring 122 and the second sealing ring are provided with a plurality of annular ribs 9 at intervals, and the annular ribs 9 contact the heat exchange inner tube 6, the first inner tube sleeve 12, and the second inner tube sleeve 22 to achieve a sealing effect on the end ports of the first inner tube sleeve 12 and the second inner tube sleeve 22.

[0079] Please refer to the following: Figure 1-6 In this embodiment, the return main pipe 4 is provided with a plurality of first inner pipe interfaces 41 at intervals on the side end facing the intake main pipe 3, which are matched one by one with each of the first inner pipe sleeves 12. The intake main pipe 3 is provided with a plurality of second inner pipe interfaces 31 at intervals on the side end facing the return main pipe 4, which are matched one by one with each of the second inner pipe sleeves 22.

[0080] One end of the heat exchange inner tube 6 is connected to the first inner tube interface 41, and the other end of the heat exchange inner tube 6 is connected to the second inner tube interface 31, thereby connecting the two opposite ends of the heat exchange inner tube 6 to the inlet main pipe 3 and the return main pipe 4 respectively.

[0081] In other embodiments, one or two water supply outer pipes 5 and heat exchange inner pipes 6 may be provided. In this case, one or two of the first outer pipe sleeve 11, the first inner pipe sleeve 12, the first sleeve cap 7, the second outer pipe sleeve 21, the second inner pipe sleeve 22, and the second sleeve cap 8 are provided in a number corresponding to the water supply outer pipe 5 and the heat exchange inner pipe 6.

[0082] Please refer to the following: Figure 1-6 In this embodiment, the range of values ​​for the inner diameter D1 of the outer water supply pipe 5 and the outer diameter D2 of the inner heat exchange pipe 6 is as follows:

[0083] 3 × Inner tube outer diameter D2 ≥ Outer tube inner diameter D1 ≥ Inner tube outer diameter D2+1 (unit: mm).

[0084] A gap must be maintained between the outer water supply pipe 5 and the inner heat exchange pipe 6 to ensure water flow within this gap. However, once the radial dimension of this gap increases to a certain extent, further increasing the diameter difference between the outer inner diameter D1 of the outer water supply pipe 5 and the outer inner diameter D2 of the inner heat exchange pipe 6 will no longer improve the heat exchange efficiency and will increase the manufacturing cost of the heat exchange device. Therefore, through actual testing, the range of values ​​for the outer inner diameter D1 of the outer water supply pipe 5 and the outer outer diameter D2 of the inner heat exchange pipe 6 has been determined.

[0085] In this embodiment, the water supply outer pipe 5 is made of plastic, and the heat exchange inner pipe 6 is made of metal.

[0086] In this preferred embodiment, the outer water supply pipe 5 can be made of PVC or PP-R material, while the inner heat exchange pipe 6 can be made of high thermal conductivity metal materials such as copper or titanium alloy. Using PVC or PP-R plastic pipes for the water-side outer water supply pipe 5 reduces costs and facilitates replacement and maintenance. Furthermore, plastic pipes have a certain degree of elasticity, allowing them to expand and contract to some extent. This enables the outer plastic water supply pipe 5 to protect the inner heat exchange pipe 6 after freezing by shrinking and deforming. Simultaneously, after thawing, the outer plastic water supply pipe 5 easily recovers its original shape upon heating, thereby improving the freeze-thaw resistance of the inner and outer pipes, reducing maintenance costs, and enhancing the reliability of the heat exchange device.

[0087] This utility model also provides a water heater, including a refrigerant circulation pipeline and a water flow circulation pipeline, and also includes the aforementioned heat exchange device. The inlet main pipe 1 and the outlet main pipe 2 are respectively connected to the water flow circulation pipeline of the water heater, and the gas inlet main pipe 3 and the gas return main pipe 4 are respectively connected to the refrigerant circulation pipeline of the water heater.

[0088] In this embodiment, the water heater is an air source heat pump water heater.

[0089] Please refer to the following: Figure 1-6 The working principle of the heat exchange device provided by this utility model is as follows:

[0090] The water flow provided by the water circulation pipeline enters the water inlet main pipe 1 from one end (i.e., the inlet end) of the water inlet main pipe 1 relative to the first water pipe end cap 13. While flowing along the water inlet main pipe 1 near the first water pipe end cap 13, it enters each water supply outer pipe 5 through the inside of each first outer pipe sleeve 11. Then, it flows through the gap between each water supply outer pipe 5 and the corresponding heat exchange inner pipe 6, and converges into the water outlet main pipe 2 through the inside of each second outer pipe sleeve 21. Finally, it enters the water circulation pipeline from one end (i.e., the outlet end) of the water outlet main pipe 2 relative to the second water pipe end cap 23. This process is repeated and linked with the overall system control of the water heater to realize the circulation of water between the water circulation pipeline and the heat exchange device.

[0091] The refrigerant supplied by the refrigerant circulation pipeline enters the air intake manifold 3 from the end away from the second water pipe end cap 23 (i.e., the air intake end), flowing in the refrigerant direction I opposite to the water flow direction H. While flowing along the air intake manifold 3 near the second water pipe end cap 23, it enters each heat exchange inner tube 6 through each second inner tube interface 31, and then flows along each heat exchange inner tube 6 through each first inner tube interface 41, converging into the return air manifold 4. As it flows through the heat exchange inner tube 6, it releases heat, exchanging heat with the water flowing in the opposite direction through the gap between the corresponding water supply outer pipe 5 and the heat exchange inner tube 6, thereby heating the water. Finally, it enters the refrigerant circulation pipeline from the end of the return air manifold 4 near the first water pipe end cap 13 (i.e., the air outlet end), and so on, in conjunction with the overall water heater system control, to achieve refrigerant circulation between the refrigerant circulation pipeline and the heat exchange device.

[0092] In other embodiments, the water flow direction H may be the same as the refrigerant flow direction I.

[0093] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the utility model.

Claims

1. A heat exchange device, characterized by, The utility model relates to a water heating device, including: Water inlet main pipe (1); Water outlet main pipe (2) is set up with water inlet main pipe (1) opposite interval; Air inlet main pipe (3) is set up in water outlet main pipe (2) opposite water inlet main pipe (1) one side; Air return main pipe (4) is set up in water inlet main pipe (1) opposite water outlet main pipe (2) one side; Several water conveying outer pipes (5) are connected between water inlet main pipe (1) and water outlet main pipe (2); Several heat exchange inner pipes (6) are set up in each water conveying outer pipe (5) one-to-one, one end of heat exchange inner pipe (6) passes through water inlet main pipe (1) and is connected to air return main pipe (4), and the opposite end of heat exchange inner pipe (6) passes through water outlet main pipe (2) and is connected to air inlet main pipe (3).

2. The heat exchange device of claim 1, wherein The side end of water inlet main pipe (1) towards water outlet main pipe (2) is set up with several first outer pipe sleeve (11) interval, and the inner diameter of first outer pipe sleeve (11) matches the outer diameter of water conveying outer pipe (5); The side end of water outlet main pipe (2) towards water inlet main pipe (1) is set up with several second outer pipe sleeve (21) interval, and the inner diameter of second outer pipe sleeve (21) matches the outer diameter of water conveying outer pipe (5); One end of water conveying outer pipe (5) is set up in first outer pipe sleeve (11), and the opposite end of water conveying outer pipe (5) is set up in second outer pipe sleeve (21).

3. The heat exchange device of claim 2, wherein The other side end of water inlet main pipe (1) away from water outlet main pipe (2) is set up with several first inner pipe sleeve (12) interval, and the inner diameter of first inner pipe sleeve (12) matches the outer diameter of heat exchange inner pipe (6); The other side end of water outlet main pipe (2) away from water inlet main pipe (1) is set up with several second inner pipe sleeve (22) interval, and the inner diameter of second inner pipe sleeve (22) matches the outer diameter of heat exchange inner pipe (6); One end of heat exchange inner pipe (6) is connected to air return main pipe (4) after passing through the inside of first outer pipe sleeve (11), water inlet main pipe (1) and first inner pipe sleeve (12), and the opposite end of heat exchange inner pipe (6) is connected to air inlet main pipe (3) after passing through the inside of second outer pipe sleeve (21), water outlet main pipe (2) and second inner pipe sleeve (22).

4. The heat exchange device of claim 3, wherein Further including: First water pipe end cap (13) is set up in one end of water inlet main pipe (1), is used for closing the corresponding end of water inlet main pipe (1); Second water pipe end cap (23) is set up in one end of water outlet main pipe (2) opposite first water pipe end cap (13), is used for closing the corresponding end of water outlet main pipe (2).

5. The heat exchange device of claim 4, wherein Further including: First sleeve sealing cap (7) includes first sealing cap bottom wall (71) and first sealing cap snap ring (72) of ring set up in the periphery of one side of first sealing cap bottom wall (71), and the middle part of first sealing cap bottom wall (71) is equipped with the first inner pipe via hole (711) of the shape matching the outline of heat exchange inner pipe (6); The second sleeve cap (8) comprises a second cap bottom wall and a second cap snap ring arranged around the periphery of one side of the second cap bottom wall, and a second inner tube through hole is arranged in the middle of the second cap bottom wall and has a shape matched with the outer shape of the heat exchange inner tube (6); The first inner tube through hole (711) is sleeved on the part of the heat exchange inner tube (6) between the first inner tube sleeve (12) and the gas return main pipe (4), the first cap bottom wall (71) abuts against the end of the first inner tube sleeve (12) away from the water inlet main pipe (1), and the first cap snap ring (72) is arranged on the outer side of the end of the first inner tube sleeve (12). The second inner tube through hole is sleeved on the part of the heat exchange inner tube (6) between the second inner tube sleeve (22) and the gas inlet main pipe (3), the second cap bottom wall abuts against the end of the second inner tube sleeve (22) away from the water outlet main pipe (2), and the second cap snap ring is arranged on the outer side of the end of the second inner tube sleeve (22).

6. The heat exchange device of claim 5, wherein The end inner side of the first inner tube sleeve (12) is provided with a first annular step (121), the end inner side of the second inner tube sleeve (22) is provided with a second annular step, and the heat exchange device further comprises: A first sealing ring (122) is sleeved on the heat exchange inner tube (6) and located between the first annular step (121) and the first sleeve cap (7); A second sealing ring is sleeved on the heat exchange inner tube (6) and located between the second annular step and the second sleeve cap (8).

7. The heat exchange device of claim 6, wherein An annular convex rib (9) is arranged on the inner side and / or outer side of the first sealing ring (122) and the second sealing ring.

8. The heat exchange device of claim 3, wherein A plurality of first inner tube interfaces (41) matched with the first inner tube sleeves (12) are arranged at intervals on one side end of the gas return main pipe (4) facing the gas inlet main pipe (3), a plurality of second inner tube interfaces (31) matched with the second inner tube sleeves (22) are arranged at intervals on one side end of the gas inlet main pipe (3) facing the gas return main pipe (4), one end of the heat exchange inner tube (6) is connected to the first inner tube interface (41), and the opposite end of the heat exchange inner tube (6) is connected to the second inner tube interface (31).

9. The heat exchange device according to any one of claims 1 to 8, wherein The inner tube outer diameter (D2) of the water conveying outer tube (5) and the outer tube inner diameter (D1) of the heat exchange inner tube (6) are in the range of: 3×inner tube outer diameter (D2)≥outer tube inner diameter (D1)≥inner tube outer diameter (D2)+1.

10. The heat exchange device according to any one of claims 1 to 8, wherein The water conveying outer tube (5) is made of plastic material, and the heat exchange inner tube (6) is made of metal material.

11. A water heater comprising a refrigerant circulation line and a water flow circulation line, characterized by, The heat exchange device according to any one of claims 1-10, wherein the water inlet main pipe (1) and the water outlet main pipe (2) are respectively connected to the water flow circulation pipeline, and the gas inlet main pipe (3) and the gas return main pipe (4) are respectively connected to the refrigerant circulation pipeline.

12. The water heater of claim 11, wherein the controller is configured to: The water heater is an air energy heat pump water heater.

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