An air source heat pump water heater

Abstract

The application relates to the technical field of heat pumps, and discloses an air source heat pump water heater, which comprises a machine box, a plurality of temperature sensors and humidity sensors are uniformly distributed on the inner front two sides of the upper part of the machine box, a heat exchange frame is fixedly connected to the inner upper end of the machine box, heat exchange mechanisms are fixedly connected to the inner front and rear ends of the two sides of the heat exchange frame, adjusting mechanisms are fixedly connected to the front and rear ends of the lower part of the heat exchange frame, and driving mechanisms are fixedly connected to the inner front and rear ends of the upper part of the heat exchange frame. The heat exchange pipe groups are arranged into nine groups of heat exchange branch pipes, each group of heat exchange pipe groups reciprocatingly rotates, the inside and outside of each group of heat exchange pipe groups is alternately switched, the inside and outside of the same group of heat exchange pipe groups is switched, the non-uniform frost formation caused by the inside and outside heat exchange is avoided, the windward surface and the leeward surface of the heat exchange branch pipe can be switched in real time, the frost formation caused by the temperature difference between the windward surface and the leeward surface of a single heat exchange branch pipe is avoided, and the air heat exchange is more uniform.

Description

Technical Field

[0001] This invention relates to the field of heat pump technology, and more particularly to an air source heat pump water heater. Background Technology

[0002] When air source heat pumps operate in low-temperature and high-humidity environments, the surface temperature of the evaporator heat exchange tubes is typically below 0°C and below the air dew point temperature. Water vapor in the air will condense on the cold surface, forming uneven frost in the vortex zone on the windward and leeward sides of the heat exchange tubes. Frost increases airflow resistance, reduces heat exchange efficiency, and leads to a decrease in the heat pump's heating efficiency. In severe cases, it can even cause ice blockage, affecting the stable operation of the system. This is a core technical bottleneck restricting the widespread application of air source heat pumps in cold regions.

[0003] In existing technologies, the mainstream solutions for evaporator frosting are mostly passive defrosting, with heated scraper defrosting being the most widely used. This type of solution involves installing an electric heating element and a mechanical scraper next to the evaporator. Once the frost reaches a certain thickness, heating is activated to melt the frost layer, and then the scraper removes the residual frost adhering to the heat exchange tubes. However, such solutions have many insurmountable drawbacks: First, they can only passively remove frost after it has formed, failing to inhibit frost formation at its source. The defrosting process consumes a large amount of electricity for heating, significantly reducing the overall energy efficiency of the heat pump system. Second, the rigid contact between the scraper and the heat exchange tubes and fins easily causes component wear, which reduces the structural reliability of the heat exchanger and may even lead to refrigerant leaks over time. Third, the scraper can only remove thick frost from the surface of the heat exchange tubes, failing to eliminate localized thin frost accumulation in the leeward vortex zone, making uniform defrosting difficult and resulting in a continued decline in heat exchange efficiency. Fourth, the evaporator must stop normal heat exchange during the defrosting cycle, causing an interruption in heat pump heating, affecting the stability of terminal heating, and frequent start-stop cycles exacerbate compressor wear and shorten equipment lifespan. Summary of the Invention

[0004] In view of the problems existing in the prior art, the purpose of this invention is to provide an air source heat pump water heater to solve the problems mentioned in the background art.

[0005] To solve the above problems, the present invention adopts the following technical solution: an air source heat pump water heater, including a casing, a heat exchanger unit fixedly connected to the lower inner end of the casing, a controller fixedly connected to the front and rear openings of the upper end of the casing, a controller fixedly connected to the upper middle part of the front right end of the casing, multiple temperature sensors and humidity sensors evenly distributed on the upper part of the front two sides of the casing, a heat exchange frame fixedly connected to the upper inner end of the casing, a heat exchange mechanism fixedly connected to the front and rear openings on both sides of the heat exchange frame, an adjustment mechanism fixedly connected to the lower front and rear ends of the heat exchange frame, and a drive mechanism fixedly connected to the upper front and rear ends of the heat exchange frame. The heat exchange mechanism includes multiple sets of heat exchange tube groups, two inlet pipes, and two outlet pipes. Each set of heat exchange tube groups includes nine heat exchange branch pipes arranged in two circular layers. The front and rear ends of each set of heat exchange tube groups are fixedly connected to rotating connecting seats. The outer periphery of each rotating connecting seat is rotatably connected to the openings at the front and rear ends and the middle ends of the heat exchange frame. Each inlet pipe is connected to the rotating connecting seat located at the front and rear ends of the heat exchange frame, and each outlet pipe is connected to the rotating connecting seat located in the middle of the heat exchange frame.

[0006] Preferably, the drive mechanism includes two drive chambers and two electric continuously variable speed controllers. Impellers are rotatably connected inside each drive chamber. A rotating shaft three is fixedly connected to the middle of each impeller. A bevel gear one is fixedly connected to the end of each rotating shaft three away from the heat exchanger. Each bevel gear one is meshed with a bevel gear two. The middle of each bevel gear two is fixedly connected to the upper input end of the electric continuously variable speed controller. A bevel gear three is fixedly connected to the lower output end of the electric continuously variable speed controller. Each bevel gear three is meshed with a bevel gear four. A rotating shaft five is fixedly connected to the middle of each bevel gear four. A full gear three is fixedly connected to the outer side of the end of each rotating shaft five near the heat exchanger. A liquid inlet pipe two is fixedly connected to the lower opening of each drive chamber.

[0007] Preferably, the drive chamber and the electric continuously variable speed controller are both fixedly connected to the upper front and rear sides of the heat exchange frame on the side closest to the heat exchange frame, and the end of the rotating shaft five is rotatably connected to the middle of the front and rear sides of the heat exchange frame on the side closest to the heat exchange frame.

[0008] Preferably, the lower ends of the two inlet pipes are all connected to the outlet end of the expansion valve in the heat exchanger unit, and the outlet pipes are all connected to the heat-conducting pipes inside the water heater in the heat exchanger unit.

[0009] Preferably, the controllers are all connected to the fan, the electric stepless speed controller, and the compressor, four-way valve, expansion valve, water pump, solenoid valve, auxiliary electric heating and overload protection device in the heat exchange unit via wires. The controllers are all connected to the temperature sensor and humidity sensor in the heat exchange rack via data transmission lines.

[0010] Preferably, the adjusting mechanism includes four racks, a second rotating shaft, a first full gear, twenty-eight large gears, and fifty-six small gears. One side of each rack meshes with a large gear, and the other side of each rack meshes with the first full gear. Each large gear meshes with an adjacent small gear. The first rotating shaft is fixedly connected to the middle of each first full gear, and a half gear and a second full gear are fixedly connected to the end of each second rotating shaft away from the heat exchange frame.

[0011] Preferably, the first and second rotating shafts are rotatably connected to the lower middle part of the front and rear sides of the heat exchange frame on the side near the heat exchange frame, and the racks are slidably connected to the front and rear ends of the heat exchange frame on the side near the heat exchange frame, with the racks on both sides being symmetrical to each other.

[0012] Preferably, two small gears are provided between each adjacent large gear, and the side of the large gear and the small gear near the heat exchange frame are fixedly connected to the side of the rotating connecting seat located on the front and rear sides of the heat exchange frame near the liquid inlet pipe.

[0013] Preferably, the upper full gear two meshes with the full gear three, and the upper and lower half gears alternately mesh with the full gear one on both sides.

[0014] The air source heat pump water heater provided by this invention has the following advantages: 1. By setting up a group of nine heat exchanger tubes, and in weather conditions prone to frost, each group of heat exchanger tubes rotates back and forth, achieving alternating switching between the inside and outside of each group. This avoids uneven heat exchange and frost formation within the same group. Furthermore, during the switching process, the windward and leeward sides of the heat exchanger tubes in each group can switch in real time. This not only prevents frost formation on individual heat exchanger tubes due to temperature differences between the windward and leeward sides, but also ensures more uniform heat exchange with the air, thus improving the heat exchange effect.

[0015] 2. The rotation of all heat exchange tube groups generates different vortices. These vortices can quickly remove residual water vapor from the upper end of the heat exchange branch pipes, preventing frost formation. Furthermore, due to the size difference between the large and small gears, different vortices are generated when the large and small gears drive the rotation of different heat exchange tube groups. This achieves non-steady, non-periodic airflow disturbance, preventing the formation of stable vortex zones between heat exchange branch pipes in a single heat exchange tube group due to simultaneous rotation of upper and lower heat exchange tube groups. This fundamentally suppresses localized preferential frost formation. Moreover, the differential rotation enhances airflow disturbance, achieving a uniform flow field distribution within the duct, avoiding alternation between ventilation channels and windbreak areas, further improving heat exchange uniformity.

[0016] 3. Through the synergistic effect of the overall rotation of all heat exchanger tube groups and differential turbulence, a dual anti-frost mechanism is achieved. This fundamentally prevents frost buildup on the exterior of the heat exchanger branch pipes within the heat exchanger tube groups. Furthermore, it intelligently controls the transmission ratio of the electric stepless speed regulator based on air temperature and humidity. When the temperature is too low or the humidity is high, it accelerates the rotation speed of all heat exchanger tube groups, increasing the switching speed between the heat exchanger branch pipes inside and outside the same group. This prevents moisture from accumulating on the heat exchanger branch pipes and allows residual moisture on the surface of the branch pipes to be easily carried away by the airflow. Simultaneously, the generated eddies and the greater eddy current difference between the upper and lower heat exchanger tube groups further accelerate the removal of moisture from the branch pipes, further reducing frost buildup. This reduces the frequency of defrosting and system start-up / shutdown, lowers the operating losses of the compressor and heat exchanger branch pipes, and improves the long-term operational stability and service life of the equipment. Additionally, during daily use, it prevents dust accumulation on the heat exchanger branch pipes, which could affect heat exchange efficiency, ensuring the equipment achieves a self-cleaning effect. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 One of the front-view perspective perspective diagrams of an air source heat pump water heater provided in this application; Figure 2 A second front-view perspective perspective diagram of an air source heat pump water heater provided for this application; Figure 3 This application provides a front-view perspective three-dimensional schematic diagram of the internal structure of an air source heat pump water heater; Figure 4 This application provides a rear-view perspective three-dimensional schematic diagram of the internal structure of an air source heat pump water heater. Figure 5 One of the front partial perspective three-dimensional schematic diagrams of the internal structure of an air source heat pump water heater provided in this application; Figure 6 This application provides a partial disassembly perspective view of the heat exchange mechanism of an air source heat pump water heater. Figure 7 A second partial three-dimensional front view of the internal structure of an air source heat pump water heater provided for this application; Figure 8 This application provides a partial rear-view perspective view of the internal structure of an air source heat pump water heater. Figure 9This application provides a rear partial sectional perspective view of the internal structure of an air source heat pump water heater. Figure 10 for Figure 9 Enlarged view of point A in the middle.

[0019] In the diagram: 1. Heat exchange rack; 2. Heat exchange mechanism; 21. Heat exchange branch pipe; 22. Rotary connecting seat; 23. Inlet pipe one; 24. Outlet pipe; 3. Adjustment mechanism; 31. Rack; 32. Large gear; 33. Small gear; 34. Full gear one; 35. Shaft one; 36. Shaft two; 37. Half gear; 38. Full gear two; 4. Drive mechanism; 41. Drive chamber; 42. Impeller; 43. Shaft three; 44. Bevel gear one; 45. Bevel gear two; 46. Electric stepless speed regulator; 47. Bevel gear three; 48. Bevel gear four; 49. Shaft five; 410. Full gear three; 411. Inlet pipe two; 5. Heat exchanger unit; 6. Chassis; 7. Fan; 8. Controller. Detailed Implementation

[0020] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0021] like Figures 1-10 As shown, this embodiment proposes an air source heat pump water heater, including a casing 6. A heat exchanger unit 5 is fixedly connected to the lower inner end of the casing 6. A controller 8 is fixedly connected to the front and rear openings of the upper end of the casing 6. A controller 8 is fixedly connected to the upper middle part of the front right end of the casing 6. Multiple temperature sensors and humidity sensors are evenly distributed on the upper part of the front two sides of the casing 6. A heat exchange rack 1 is fixedly connected to the upper inner end of the casing 6. A heat exchange mechanism 2 is fixedly connected to the front and rear openings on both sides of the heat exchange rack 1. An adjustment mechanism 3 is fixedly connected to the lower front and rear ends of the heat exchange rack 1. A drive mechanism 4 is fixedly connected to the upper front and rear ends of the heat exchange rack 1. The heat exchange mechanism 2 includes multiple heat exchange tube groups, two inlet pipes 23 and two outlet pipes 24. Each heat exchange tube group includes nine heat exchange branch pipes 21, arranged in two circular layers. The front and rear ends of each heat exchange tube group are fixedly connected to a rotating connecting seat 22. The outer periphery of the rotating connecting seat 22 is rotatably connected to the openings at both ends of the front and rear sides and the middle of the heat exchange frame 1. The inlet pipes 23 are all connected to the rotating connecting seats 22 located at the front and rear sides of the heat exchange frame 1, and the outlet pipes 24 are all connected to the rotating connecting seat 22 located in the middle of the heat exchange frame 1.

[0022] Specifically, by setting the heat exchange tube group into a group of nine heat exchange branch pipes 21, and in weather conditions prone to frost, each group of heat exchange tubes rotates back and forth, achieving alternating switching between the inside and outside of each group of heat exchange tubes. This ensures that the switching between the inside and outside of the same group of heat exchange tubes avoids uneven heat exchange and frost formation. Furthermore, during the switching between the inside and outside of each heat exchange tube group, the windward and leeward sides of the heat exchange branch pipes 21 can switch in real time. This not only avoids the situation where a single heat exchange branch pipe 21 is prone to frost formation due to the temperature difference between the windward and leeward sides, but also makes the heat exchange with the air more uniform and improves the heat exchange effect.

[0023] It should be noted that the heat exchange unit 5 mainly consists of a compressor, a four-way valve, an expansion valve, a water pump, a solenoid valve, an auxiliary electric heater, an overload protection device, a water heater, heat exchange pipes, inlet and outlet water control valves, and various connecting pipes. How the coolant is vaporized through the compressor and expansion valve and transported to unit 2 for heat exchange with the air, i.e. how the air source heat pump water heater absorbs heat from the air to heat the water, is existing technology and is mature. Therefore, its principle will not be elaborated here.

[0024] In this embodiment, the drive mechanism 4 includes two drive chambers 41 and two electric continuously variable speed controllers 46. Impellers 42 are rotatably connected inside each drive chamber 41. A rotating shaft 43 is fixedly connected to the middle of each impeller 42. A bevel gear 44 is fixedly connected to the end of the rotating shaft 43 away from the heat exchange rack 1. A bevel gear 45 is meshed with the bevel gear 44. The middle of the bevel gear 45 is fixedly connected to the upper input end of the electric continuously variable speed controller 46. A bevel gear 47 is fixedly connected to the lower output end of the electric continuously variable speed controller 46. A bevel gear 48 is meshed with the bevel gear 47. A rotating shaft 49 is fixedly connected to the middle of the bevel gear 48. A full gear 410 is fixedly connected to the outside of the end of the rotating shaft 49 near the heat exchange rack 1. An inlet pipe 411 is fixedly connected to the lower opening of each drive chamber 41.

[0025] In this embodiment, the drive chamber 41 and the electric continuously variable speed controller 46 are both fixedly connected to the upper front and rear sides of the heat exchange frame 1 on the side closest to the heat exchange frame 1, and the rotating shaft 49 is rotatably connected to the middle of the front and rear sides of the heat exchange frame 1 on the end closest to the heat exchange frame 1.

[0026] In this embodiment, the lower end of the liquid inlet pipe 411 is connected to the discharge end of the expansion valve in the heat exchanger unit 5, and the liquid outlet pipe 24 is connected to the heat conduction pipe inside the water heater in the heat exchanger unit 5.

[0027] Specifically, through the synergistic effect of the overall rotation of all heat exchanger tube groups and differential turbulence, a dual anti-frost mechanism is achieved. This fundamentally prevents frost buildup on the exterior of the heat exchanger branch pipes 21 within the heat exchanger tube group. Furthermore, based on air temperature and humidity, the transmission ratio of the electric stepless speed regulator 46 is intelligently controlled. When the temperature is too low or the humidity is high, the rotation speed of all heat exchanger tube groups is increased, increasing the switching speed of the heat exchanger branch pipes 21 inside and outside the same group. This prevents water vapor from accumulating on the heat exchanger branch pipes 21 and avoids water vapor accumulating for too long. As a result, the water vapor remaining on the surface of the heat exchanger branch pipes 21 can be easily carried away by the airflow. At the same time, the generated eddies and the eddy current difference between the upper and lower heat exchanger tube groups are larger, allowing the water vapor on the heat exchanger branch pipes 21 to be quickly carried away, further reducing frost formation. This reduces the number of defrosting operations and the frequency of system start-ups and shutdowns, thereby reducing the operating losses of the compressor and the heat exchanger branch pipes 21 and improving the long-term operational stability and service life of the equipment.

[0028] In this embodiment, the controller 8 is connected to the fan 7, the electric stepless speed regulator 46, and the compressor, four-way valve, expansion valve, water pump, solenoid valve, auxiliary electric heating and overload protection device in the heat exchanger group 5 through wires. The controller 8 is also connected to the temperature sensor and humidity sensor in the heat exchange rack 1 through data transmission lines.

[0029] It should be noted that how the controller 8 receives and transmits signals and controls all electrical components in the air source water heater are existing and mature technologies, and their principles will not be elaborated here.

[0030] In this embodiment, the adjustment mechanism 3 includes four racks 31, a second rotating shaft 36, a first full gear 34, twenty-eight large gears 32, and fifty-six small gears 33. One side of each rack 31 meshes with a large gear 32, and the other side of each rack 31 meshes with a first full gear 34. Each large gear 32 meshes with an adjacent small gear 33. The middle of each first full gear 34 is fixedly connected to a first rotating shaft 35. The end of the second rotating shaft 36 away from the heat exchange frame 1 is fixedly connected to a half gear 37 and a second full gear 38.

[0031] In this embodiment, the first rotating shaft 35 and the second rotating shaft 36 are rotatably connected to the lower middle part of the front and rear sides of the heat exchange frame 1 on the side near the heat exchange frame 1, and the rack 31 is slidably connected to the front and rear ends of the heat exchange frame 1 on the side near the heat exchange frame 1. The two racks 31 are symmetrical to each other.

[0032] In this embodiment, two small gears 33 are provided between adjacent large gears 32. The side of the large gear 32 and the small gear 33 near the heat exchange frame 1 are fixedly connected to the side of the rotating connecting seat 22 located on the front and rear sides of the heat exchange frame 1 near the liquid inlet pipe 23.

[0033] In this embodiment, the upper full gear 2 38 meshes with the full gear 3 410, and the upper and lower half gears 37 alternately mesh with the two full gears 1 34.

[0034] Specifically, when the compressor in the heat exchanger unit 5 delivers refrigerant to the drive chamber 41 through the liquid inlet pipe 411, the impeller 42 drives the shaft 43 to rotate, which in turn drives the bevel gear 47 to rotate through the bevel gear 44, bevel gear 45, and electric stepless speed regulator 46. This, in turn, drives the full gear 410 to rotate through the bevel gear 48 and shaft 49, which in turn drives the upper full gear 38 to rotate. The upper full gear 38 then synchronously drives the lower full gear 38 to rotate. Next, the shaft 36 drives the upper and lower half gears 37 to rotate, alternately meshing with the full gears 34 on both sides. Then, the full gears 34 drive the racks 31 on both sides to move up and down. Finally, the racks 31 mesh with the large gear 32, which in turn meshes with the small gears 33 on the upper and lower sides, driving all the gears on the front and rear sides... The rotating connecting seat 22 reciprocates, eventually driving all groups of heat exchange tubes to reciprocate. The rotation of all groups of heat exchange tubes generates different vortices, which quickly remove residual moisture from the upper end of the heat exchange branch pipe 21, preventing frost formation. Furthermore, due to the size difference between the large gear 32 and the small gear 33, different vortices are generated when the large gear 32 and the small gear 33 drive different groups of heat exchange tubes to rotate, achieving non-steady, non-periodic airflow disturbance. This avoids the stable vortex zone that easily forms between the heat exchange branch pipes 21 in a heat exchange tube group due to the same rotation speed of the upper and lower heat exchange tube groups, thus suppressing localized preferential frost formation at the source. Moreover, the differential rotation enhances airflow disturbance, achieving a uniform flow field distribution within the duct, preventing the alternation of ventilation channels and windbreak areas, and further improving heat exchange uniformity.

[0035] Working Principle: When the air source heat pump water heater is working, multiple temperature and humidity sensors installed inside the casing 6 monitor the humidity and temperature information of the air entering the casing 6 and send it to the controller 8 in real time. When the air humidity and temperature reach the conditions for frosting, the controller 8 controls the electric stepless speed regulator 46 to adjust the transmission ratio. The compressor in the heat exchanger unit 5 delivers refrigerant to the drive chamber 41 through the liquid inlet pipe 411. The impeller 42 drives the rotating shaft 43 to rotate, which in turn drives the bevel gear 47 through the bevel gear 44, bevel gear 45, and the electric stepless speed regulator 46. This, in turn, drives the full gear 410 through the bevel gear 48 and the rotating shaft 49, and finally drives the upper full gear 38 to rotate. The upper full gear 38 synchronously drives the lower full gear 38 to rotate. Then, the rotating shaft 36 drives the upper and lower half gears 37 to rotate, alternately meshing with the full gears 34 on both sides. Then, the full gears 34 drive the racks 31 on both sides to move up and down. Then, the racks 31 mesh with the large gear 32, and the large gear 32 meshes with the small gears 33 on the upper and lower sides, driving all the rotating connecting seats 22 on the front and rear sides to rotate back and forth. Finally, it drives all the heat exchange tube groups to rotate back and forth. By setting the heat exchange tube groups into a group of nine heat exchange branch pipes 21, and in weather conditions prone to frost, the reciprocating rotation of each group of heat exchange tubes achieves the alternating inside and outside switching of each group of heat exchange tubes. This ensures that the inside and outside switching of the same group of heat exchange tubes avoids uneven heat exchange and frost formation. In this case, during the switching between inside and outside, the windward and leeward sides of the heat exchange branch pipe 21 in each heat exchange tube group can switch in real time. This not only avoids the easy frosting of a single heat exchange branch pipe 21 due to the temperature difference between the windward and leeward sides, but also makes the heat exchange with the air more uniform, improving the heat exchange effect. When all groups of heat exchange tubes rotate, different vortices are generated. These vortices can quickly remove the water vapor remaining on the upper end of the heat exchange branch pipe 21, preventing water vapor from remaining on the upper end of the heat exchange branch pipe 21 and causing frosting. Furthermore, due to the difference in size between the large gear 32 and the small gear 33, different vortices are generated when the large gear 32 and the small gear 33 drive different groups of heat exchange tubes to rotate, realizing non-steady-state and non-periodic airflow disturbance and avoiding the upper and lower groups from being disturbed. The uniform rotation of the heat exchanger tubes leads to the formation of stable vortex zones between the heat exchanger branch pipes 21 within a single heat exchanger tube group, effectively suppressing localized preferential frost formation at its source. Furthermore, differential rotation enhances airflow disturbance, achieving a uniform flow field distribution within the duct and preventing alternation between ventilation channels and windbreak areas, further improving heat exchange uniformity. Through the synergistic effect of the overall rotation of all heat exchanger tube groups and differential turbulence, a dual frost suppression mechanism is achieved, fundamentally preventing frost formation and cleaning on the exterior of the heat exchanger branch pipes 21 within the heat exchanger tube group. Moreover, the transmission ratio of the electric continuously variable speed controller 46 can be intelligently controlled based on air temperature and humidity conditions, accelerating the rotation speed of all heat exchanger tube groups when the temperature is too low or the humidity is high, thus increasing the switching speed of the heat exchanger branch pipes 21 within and outside the same heat exchanger tube group.To prevent moisture from accumulating on the heat exchange branch pipe 21 and for an extended period, the airflow easily carries away any residual moisture on its surface. The generated eddies and the greater eddy difference between the upper and lower heat exchange tube sets further accelerate the removal of moisture from the branch pipe 21, reducing frosting and thus decreasing the frequency of defrosting and system start-ups / shutdowns. This reduces operating losses in both the compressor and the heat exchange branch pipe 21, improving long-term operational stability and lifespan. Furthermore, it prevents dust accumulation on the heat exchange branch pipe 21 during daily use, thus ensuring a self-cleaning effect and preventing it from affecting heat exchange efficiency.

[0036] The above embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Although the invention has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of the invention do not depart from the spirit and scope of the invention and should be covered within the scope of the claims of the invention.

Claims

1. An air source heat pump water heater, comprising a casing (6), characterized in that, A heat exchanger assembly (5) is fixedly connected to the lower inner end of the chassis (6). A controller (8) is fixedly connected to the front and rear openings of the upper end of the chassis (6). A controller (8) is fixedly connected to the upper middle part of the right front end of the chassis (6). Multiple temperature sensors and humidity sensors are evenly distributed on the upper part of the front two sides of the chassis (6). A heat exchange rack (1) is fixedly connected to the upper inner end of the chassis (6). A heat exchange mechanism (2) is fixedly connected to the front and rear openings on both sides of the heat exchange rack (1). An adjustment mechanism (3) is fixedly connected to the lower front and rear ends of the heat exchange rack (1). A drive mechanism (4) is fixedly connected to the upper front and rear ends of the heat exchange rack (1). The heat exchange mechanism (2) includes multiple heat exchange tube groups, two inlet pipes (23) and two outlet pipes (24). Each heat exchange tube group includes nine heat exchange branch pipes (21) arranged in two circular layers. The front and rear ends of each heat exchange tube group are fixedly connected to a rotating connecting seat (22). The outer periphery of the rotating connecting seat (22) is rotatably connected to the openings at the front and rear ends and the middle ends of the heat exchange frame (1). The inlet pipes (23) are all connected to the rotating connecting seats (22) located at the front and rear ends of the heat exchange frame (1). The outlet pipes (24) are all connected to the rotating connecting seat (22) located in the middle of the heat exchange frame (1).

2. The air source heat pump water heater according to claim 1, characterized in that, The drive mechanism (4) includes two drive chambers (41) and two electric continuously variable speed controllers (46). Impellers (42) are rotatably connected inside each drive chamber (41). A rotating shaft (43) is fixedly connected to the middle of each impeller (42). A bevel gear (44) is fixedly connected to the end of the rotating shaft (43) away from the heat exchanger (1). A bevel gear (45) is meshed with each bevel gear (44). The middle of each bevel gear (45) is fixedly connected to the electric continuously variable speed controller. The upper input end of the speed regulator (46) and the lower output end of the electric stepless speed regulator (46) are fixedly connected to bevel gear three (47). The bevel gear three (47) is meshed with bevel gear four (48). The middle part of the bevel gear four (48) is fixedly connected to shaft five (49). The outer side of the shaft five (49) near the heat exchange rack (1) is fixedly connected to full gear three (410). The lower opening of the drive chamber (41) is fixedly connected to liquid inlet pipe two (411).

3. An air source heat pump water heater according to claim 2, characterized in that, The drive chamber (41) and the electric stepless speed regulator (46) are both fixedly connected to the upper front and rear sides of the heat exchange frame (1) on the side closest to the heat exchange frame (1), and the rotating shaft five (49) is rotatably connected to the middle of the front and rear sides of the heat exchange frame (1) at one end.

4. An air source heat pump water heater according to claim 2, characterized in that, The lower ends of the two inlet pipes (411) are all connected to the outlet end of the expansion valve in the heat exchanger unit (5), and the outlet pipes (24) are all connected to the heat-conducting pipe inside the water heater in the heat exchanger unit (5).

5. An air source heat pump water heater according to claim 2, characterized in that, The controllers (8) are all connected to the fan (7), the electric stepless speed regulator (46), and the compressor, four-way valve, expansion valve, water pump, solenoid valve, auxiliary electric heating and overload protection device in the heat exchanger group (5) via wires. The controllers (8) are all connected to the temperature sensor and humidity sensor in the heat exchange rack (1) via data transmission lines.

6. An air source heat pump water heater according to claim 2, characterized in that, The adjustment mechanism (3) includes four racks (31), a second rotating shaft (36), a first full gear (34), twenty-eight large gears (32) and fifty-six small gears (33). One side of each rack (31) meshes with a large gear (32), and the other side of each rack (31) meshes with the first full gear (34). Each large gear (32) meshes with an adjacent small gear (33). The first full gear (34) is fixedly connected to a first rotating shaft (35) in the middle. The second rotating shaft (36) is fixedly connected to a half gear (37) and a second full gear (38) at the end away from the heat exchanger (1).

7. An air source heat pump water heater according to claim 6, characterized in that, The first rotating shaft (35) and the second rotating shaft (36) are rotatably connected to the lower middle part of the front and rear sides of the heat exchange frame (1) on the side near the heat exchange frame (1), and the rack (31) is slidably connected to the front and rear ends of the heat exchange frame (1) on the side near the heat exchange frame (1). The racks (31) on both sides are symmetrical to each other.

8. An air source heat pump water heater according to claim 6, characterized in that, Two small gears (33) are provided between each of the adjacent large gears (32). The side of the large gear (32) and the small gear (33) near the heat exchange frame (1) are fixedly connected to the side of the rotating connecting seat (22) located on the front and rear sides of the heat exchange frame (1) near the liquid inlet pipe (23).

9. An air source heat pump water heater according to claim 6, characterized in that, The upper full gear two (38) meshes with the full gear three (410), and the upper and lower half gears (37) alternately mesh with the full gear one (34) on both sides.

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