Air source heat pump water heater with waste heat recovery structure

Abstract

The invention relates to the technical field of water heaters, in particular to an air source heat pump water heater with a waste heat recovery structure, which comprises a water storage tank, a heat pump host is arranged outside the water storage tank, a return pipe is fixedly connected to the top end of the water storage tank, and a water supply pipe is fixedly connected to the bottom end of the water storage tank. The water supply pipe extends into the water storage tank, the outer wall of the water supply pipe is fixedly connected with a circulating water pump, and the outer wall of the heat pump main machine is fixedly connected with a recovery device. Hot gas generated by operation of the heat pump main machine can be efficiently gathered and guided to the spiral gas guide pipe, the unique spiral structure of the spiral gas guide pipe greatly prolongs the gas flowing path, cold water and the hot gas are fully subjected to heat exchange in cooperation with the heating pipe, and heat originally dissipated into the environment is effectively recycled to be used for preheating the cold water.

Description

Technical Field

[0001] The present invention relates to the technical field of water heaters, and in particular to an air source heat pump water heater with a waste heat recovery structure. Background Art

[0002] With the increasing popularity of energy conservation and environmental protection, air-source heat pump water heaters, which utilize energy from the air to heat water, have gradually become a popular choice for hot water supply equipment in the market. However, existing air-source heat pump water heaters still have many practical problems, which limit their performance improvement and widespread promotion. In terms of energy utilization, during the operation of traditional air source heat pump water heaters, the hot gas generated by the heat pump main unit is usually discharged directly into the environment, and there is a lack of effective recycling and utilization methods. This not only causes a large amount of energy waste, but also makes the electricity consumption required for heating cold water remain high, and the long-term use cost is high, which is contrary to the current development trend of green energy conservation. In terms of ease of use, the water level adjustment of most air source heat pump water heaters relies on manual operation. Users need to frequently adjust the water intake according to water usage. This is not only cumbersome to operate, but it is also easy to cause the water tank to overflow or the water level to be too low due to negligence, affecting normal use. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the present invention solves the technical problems thereof by adopting the following technical solutions: an air source heat pump water heater with a waste heat recovery structure, comprising: a water storage tank, a heat pump main unit is arranged on the outside of the water storage tank, a return pipe is fixedly connected to the top of the water storage tank, a water supply pipe is fixedly connected to the bottom of the water storage tank, the water supply pipe extends to the inside of the water storage tank, a circulating water pump is fixedly connected to the outer wall of the water supply pipe, a recovery device is fixedly connected to the outer wall of the heat pump main unit, an adjusting device is arranged on the inner top of the water storage tank, and a cleaning device is arranged on the inner bottom of the water storage tank; the recovery The device includes a wind gathering hood, the inner wall of which is symmetrically fixedly connected with an wind gathering ring, the inner wall of which is fixedly connected with a spiral air guide tube, the top of the spiral air guide tube is provided with a water receiving ring tube, the bottom end of the spiral air guide tube is provided with a water supply ring tube, and the inner center of the spiral air guide tube is provided with a heating tube; the adjusting device includes a water inlet pipe, the bottom end of the water inlet pipe is fixedly connected with a bellows, the bottom end of the bellows is fixedly connected with a water gathering block, the outer wall of the water gathering block is fixedly connected with a connecting pipe, the outer wall of the water gathering block is fixedly connected with a limiting rod, and the inner wall of the water gathering block is threadedly connected with an adjusting screw.

[0004] The present invention further provides that the outer wall of the wind collecting hood is fixedly connected to the outer wall of the heat pump main unit, a tapered tube is fixedly connected to the outer wall of the spiral air guide tube, the top end of the heating tube is fixedly connected to the outer wall of the water receiving ring tube, and the end of the heating tube away from the water receiving ring tube is fixedly connected to the outer wall of the water supply ring tube. When the heat pump main unit is operating, a certain amount of gas is generated. The wind collecting hood and the wind collecting ring on its inner wall can collect and guide this gas, ultimately guiding it through the tapered tube into the spiral air guide tube. The spiral structure of the spiral air guide tube extends the flow path of the gas, allowing it to have more time for heat exchange with the medium outside the tube.

[0005] The present invention is further configured such that the outer wall of the tapered tube is fixedly connected to the inner wall of the wind collecting hood, the outer wall of the water receiving ring tube is fixedly connected to the external tube, and the outer wall of the water supply ring tube is fixedly connected to the delivery pipe.

[0006] The present invention further provides that the outer walls of the external pipe and the delivery pipe are both fixedly connected to the inner wall of the wind condenser, the end of the external pipe remote from the water receiving ring pipe is fixedly connected to the outer wall of the water supply pipe, and the end of the delivery pipe remote from the water supply ring pipe is fixedly connected to the inner wall of the water storage tank. A portion of the cold water in the water supply pipe flows through the external pipe into the water receiving ring pipe and then into the heating pipe within the spiral air guide pipe. In the heating pipe, the cold water exchanges heat with the hot gas within the spiral air guide pipe, absorbing heat and raising its temperature. The heated water is then re-delivered to the water storage tank via the water supply ring pipe and the delivery pipe, completing the preheating of the cold water and realizing the recovery and utilization of heat generated by the operation of the heat pump main unit.

[0007] The present invention further comprises an outer wall of the water inlet pipe fixedly connected to the inner wall of the water tank, an outer wall of the limit rod slidably connected to the inner wall of the water tank, and an outer wall of the adjustment screw rotatably connected to the inner wall of the water tank. An adjustment motor is provided on the outer wall of the water inlet pipe. External cold water is introduced into the water tank via the water inlet pipe, and the adjustment motor drives the adjustment screw to rotate. Since the water collecting block is threadedly connected to the adjustment screw, rotation of the adjustment screw drives the water collecting block to move. The water collecting block is guided by the limit rod to its height within the water tank, thereby changing the height of the water outlet of the connecting pipe.

[0008] The present invention further provides that the outer wall of the regulating motor is fixedly connected to the outer wall of the water tank, the outer wall of the regulating screw is fixedly connected to the output end of the regulating motor, and a blocking rod is slidably connected to the inner wall of the connecting pipe, and the bottom end of the blocking rod is fixedly connected to a float. When the water level in the water tank rises, the float rises with the water level, driving the blocking rod upward in the connecting pipe, gradually blocking the connecting pipe and reducing water inflow. When the water level drops, the float moves downward, the blocking rod releases the connecting pipe, and water inflow increases. In this way, the water level in the water tank can be dynamically adjusted under different usage conditions to maintain a stable water level.

[0009] The present invention further provides that the cleaning device includes a filter housing, an inner wall of the filter housing being rotatably connected to a rotating rod, an outer wall of the rotating rod being fixedly connected to an impeller, a top end of the rotating rod being fixedly connected to a scraper, and a sewage pipe being provided on the exterior of the filter housing. Water from the water supply pipe flows through the filter housing, causing the impeller to rotate at the bottom of the water tank via the rotating rod, and the scraper at the top end of the rotating rod to rotate accordingly. During the rotation of the scraper, its outer wall slides against the inner wall of the water tank, scraping off impurities and scale adhering to the inner wall of the water tank.

[0010] The present invention is further configured such that the bottom end of the filter housing is fixedly connected to the inner wall of the water tank, the outer wall of the rotating rod is rotatably connected to the inner wall of the water tank, the outer wall of the scraper is slidably connected to the inner wall of the water tank, and the outer wall of the filter housing is fixedly connected to the outer wall of the water supply pipe.

[0011] The present invention further provides a configuration in which a brush head is fixedly connected to the bottom end of the scraper, the outer wall of the brush head being slidably connected to the inner wall of the water tank, and the outer wall of the drain pipe being fixedly connected to the inner wall of the water tank. Removed impurities, due to the curvature of the filter housing exterior and the tapered shape of the water tank bottom, fall to the edge of the bottom end of the water tank. The scraping action of the brush head then carries the impurities to the drain pipe, which can be discharged by periodically opening the drain pipe.

[0012] The beneficial effects of the present invention are as follows: 1. This invention utilizes a recovery device, a wind collecting hood, a wind collecting ring, and a tapered tube to efficiently collect and guide the hot gases generated by the heat pump main unit to the spiral air duct. The spiral air duct's unique spiral structure significantly extends the gas flow path. Combined with the heating tube, it allows for a thorough heat exchange between the cold water and the hot gases, effectively recovering the heat that would otherwise be released into the environment for use in preheating the cold water. Compared to traditional air-source heat pump water heaters, this design significantly improves energy efficiency and reduces the electricity consumption required to heat the cold water. This can significantly save users significant operating costs over long-term use while also reducing energy waste, aligning with the development trend of green energy conservation.

[0013] 2. The present invention is provided with an adjustment device, which can accurately change the height of the water collecting block by adjusting the motor-driven adjustment screw according to actual use needs, and then adjust the position of the water outlet of the connecting pipe to meet the setting of the water level of the water tank in different water use scenarios. At the same time, the water level sensing adjustment structure composed of the float and the blocking rod can monitor the water level changes in real time and adjust the water intake to avoid water tank overflow or low water level. This water level adjustment method does not require frequent manual operation by the user, improves the convenience and stability of the water heater, and brings a more comfortable water experience to the user.

[0014] 3. The present invention sets a cleaning device to utilize the water flow when the circulating water pump is working to drive the impeller to rotate, driving the scraper and brush head to continuously clean the inner wall and bottom of the water tank, effectively scraping off the attached impurities and scale. Combined with the curvature design of the filter shell and the conical structure of the bottom of the water tank, the cleaned impurities are smoothly gathered to the drain pipe, which is convenient for users to clean regularly. It also effectively avoids the accumulation of impurities in the water tank, prevents it from affecting the heat exchange efficiency and clogging the pipeline, reduces the probability of equipment failure, extends the overall service life of the air source heat pump water heater, and reduces the equipment maintenance cost and frequency.

[0015] 4. This invention integrates a recovery device, a regulating device, and a cleaning device to form a complete system optimization solution. Waste heat recovery improves energy efficiency, water level regulation ensures a stable water supply, and automatic cleaning maintains equipment performance. These three working together not only enhance the functionality of the water heater but also strengthen its overall operational reliability and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the internal structure of the present invention; Figure 3 It is a schematic structural diagram of the cleaning device of the present invention; Figure 4 It is a structural schematic diagram of the regulating device of the present invention; Figure 5 It is a structural schematic diagram of the recovery device of the present invention; Figure 6 It is a schematic diagram of the internal structure of the recovery device of the present invention; Figure 7 It is a structural schematic diagram of the spiral airway of the present invention.

[0017] In the figure: 1. Water storage tank; 2. Heat pump main unit; 3. Recovery device; 31. Air collecting hood; 32. Air collecting ring; 33. External pipe; 34. Delivery pipe; 35. Spiral air guide pipe; 36. Water receiving ring pipe; 37. Water supply ring pipe; 38. Heating pipe; 39. Conical pipe; 4. Return pipe; 5. Water supply pipe; 6. Circulating water pump; 7. Cleaning device; 71. Filter housing; 72. Impeller; 73. Rotating rod; 74. Scraper; 75. Brush head; 76. Drain pipe; 8. Adjustment device; 81. Water inlet pipe; 82. Limit rod; 83. Adjustment screw; 84. Bellows; 85. Water collecting block; 86. Connecting pipe; 87. Blocking rod; 88. Float; 89. Adjustment motor. DETAILED DESCRIPTION

[0018] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described to better illustrate the principles of the invention and its practical application, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for specific applications. Example

[0019] See also Figure 1 - Figure 7 The present invention provides a technical solution: an air source heat pump water heater with a waste heat recovery structure, comprising: a water tank 1, a heat pump main unit 2 is arranged outside the water tank 1, a return pipe 4 is fixedly connected to the top of the water tank 1, a water supply pipe 5 is fixedly connected to the bottom of the water tank 1, the water supply pipe 5 extends to the inside of the water tank 1, a circulating water pump 6 is fixedly connected to the outer wall of the water supply pipe 5, a recovery device 3 is fixedly connected to the outer wall of the heat pump main unit 2, an adjustment device 8 is arranged at the top of the water tank 1, and a cleaning device 7 is arranged at the bottom of the water tank 1; the recovery device 3 includes a wind collecting cover 31, and the inner wall of the wind collecting cover 31 is symmetrical. It is fixedly connected with an air gathering ring 32, and the inner wall of the air gathering cover 31 is fixedly connected with a spiral air guide tube 35, the top of the spiral air guide tube 35 is provided with a water receiving ring tube 36, the bottom end of the spiral air guide tube 35 is provided with a water supply ring tube 37, and the inner center of the spiral air guide tube 35 is provided with a heating tube 38; the adjusting device 8 includes a water inlet pipe 81, the bottom end of the water inlet pipe 81 is fixedly connected with a bellows 84, the bottom end of the bellows 84 is fixedly connected with a water gathering block 85, the outer wall of the water gathering block 85 is fixedly connected with a connecting pipe 86, the outer wall of the water gathering block 85 is fixedly connected with a limiting rod 82, and the inner wall of the water gathering block 85 is threadedly connected with an adjusting screw 83.

[0020] The outer wall of the wind collecting hood 31 is fixedly connected to the outer wall of the heat pump main unit 2, the outer wall of the spiral air guide tube 35 is fixedly connected to the tapered tube 39, the top of the heating tube 38 is fixedly connected to the outer wall of the water receiving ring tube 36, and the end of the heating tube 38 away from the water receiving ring tube 36 is fixedly connected to the outer wall of the water supply ring tube 37.

[0021] The outer wall of the tapered tube 39 is fixedly connected to the inner wall of the wind collecting cover 31 , the outer wall of the water receiving ring tube 36 is fixedly connected to the external pipe 33 , and the outer wall of the water supply ring tube 37 is fixedly connected to the delivery pipe 34 .

[0022] The outer walls of the external pipe 33 and the delivery pipe 34 are fixedly connected to the inner wall of the wind gathering hood 31. The end of the external pipe 33 away from the water receiving ring pipe 36 is fixedly connected to the outer wall of the water delivery pipe 5, and the end of the delivery pipe 34 away from the water delivery ring pipe 37 is fixedly connected to the inner wall of the water storage tank 1.

[0023] The outer wall of the water inlet pipe 81 is fixedly connected to the inner wall of the water tank 1, the outer wall of the limit rod 82 is slidingly connected to the inner wall of the water tank 1, the outer wall of the adjusting screw 83 is rotatably connected to the inner wall of the water tank 1, and the outer wall of the water inlet pipe 81 is provided with an adjusting motor 89.

[0024] The outer wall of the regulating motor 89 is fixedly connected to the outer wall of the water tank 1, the outer wall of the regulating screw 83 is fixedly connected to the output end of the regulating motor 89, the inner wall of the connecting pipe 86 is slidably connected to the blocking rod 87, and the bottom end of the blocking rod 87 is fixedly connected to the float 88.

[0025] The cleaning device 7 includes a filter housing 71 , the inner wall of the filter housing 71 is rotatably connected to a rotating rod 73 , the outer wall of the rotating rod 73 is fixedly connected to an impeller 72 , the top of the rotating rod 73 is fixedly connected to a scraper 74 , and a sewage pipe 76 is provided outside the filter housing 71 .

[0026] The bottom end of the filter housing 71 is fixedly connected to the inner wall of the water tank 1, the outer wall of the rotating rod 73 is rotatably connected to the inner wall of the water tank 1, the outer wall of the scraper 74 is slidably connected to the inner wall of the water tank 1, and the outer wall of the filter housing 71 is fixedly connected to the outer wall of the water supply pipe 5.

[0027] The bottom end of the scraper 74 is fixedly connected to a brush head 75 , the outer wall of the brush head 75 is slidably connected to the inner wall of the water tank 1 , and the outer wall of the sewage pipe 76 is fixedly connected to the inner wall of the water tank 1 .

[0028] Working principle: When in use, the circulating water pump 6 is started to send the water in the water storage tank 1 into the heat pump main unit 2 through the water supply pipe 5. The heat pump main unit 2 drives the refrigerant circulation through the internal compressor. It first absorbs heat from the air in the evaporator and evaporates from liquid to gas; then it is compressed into high-temperature and high-pressure gas by the compressor, and releases the heat to the cold water in the condenser; then it is reduced in pressure and temperature by the expansion valve and turned back into low-temperature and low-pressure liquid. This cycle repeats, using a small amount of electrical energy to achieve the transfer of heat from low-temperature air to high-temperature water, and the generated hot water is transported to the water storage tank 1 through the return pipe 4; Through the recovery device 3, the heat pump host 2 generates gas with a certain amount of heat when it is working. The air collecting cover 31 and the air collecting ring 32 on its inner wall can collect and guide this gas, and finally guide it into the spiral air guide pipe 35 through the tapered pipe 39. The spiral structure of the spiral air guide pipe 35 extends the flow path of the gas, so that it has more sufficient heat exchange time with the medium outside the pipe. A part of the cold water in the water supply pipe 5 flows into the water receiving ring pipe 36 through the external pipe 33, and then enters the heating pipe 38 in the spiral air guide pipe 35. In the heating pipe 38, the cold water exchanges heat with the hot gas in the spiral air guide pipe 35, and its temperature rises after absorbing heat. The heated water is then re-delivered to the water storage tank 1 through the water supply ring pipe 37 and the delivery pipe 34, completing the preheating of the cold water and realizing the recovery and utilization of the heat generated by the operation of the heat pump host 2; By setting the regulating device 8, external cold water is introduced into the water storage tank 1 through the water inlet pipe 81, and the regulating motor 89 drives the regulating screw 83 to rotate. Since the water collecting block 85 is threadedly connected to the regulating screw 83, the rotation of the regulating screw 83 will drive the water collecting block 85 to move. The water collecting block 85 is guided by the limit rod 82 at its height in the water storage tank 1, thereby changing the height of the water outlet of the connecting pipe 86; when the water level in the water storage tank 1 rises, the float 88 rises with the water level, driving the blocking rod 87 to move upward in the connecting pipe 86, gradually blocking the connecting pipe 86 and reducing the water inflow; when the water level drops, the float 88 moves downward, the blocking rod 87 loosens the connecting pipe 86, and the water inflow increases. In this way, the water level in the water storage tank 1 can be dynamically adjusted under different usage conditions to maintain a stable water level. The cleaning device 7 is provided, and when the circulating water pump 6 sucks the water in the water storage tank 1 through the water supply pipe 5, the water in the water supply pipe 5 flows through the filter housing 71, causing the impeller 72 to rotate at the bottom of the water storage tank 1 through the rotating rod 73, and the scraper 74 at the top of the rotating rod 73 rotates accordingly. During the rotation process, the outer wall of the scraper 74 slides in contact with the inner wall of the water storage tank 1, scraping off the impurities and scale attached to the inner wall of the water storage tank 1; at the same time, the brush head 75 at the bottom end of the scraper 74 also scrubs the bottom end of the inner wall of the water storage tank 1 to further clean the impurities; the cleaned impurities pass through the curvature of the outside of the filter housing 71 and the conical shape of the bottom of the water storage tank 1, so that the impurities fall to the edge of the bottom end of the water storage tank 1, and are scraped by the scraping of the brush head 75 to the sewage pipe 76. The sewage pipe 76 can be opened regularly to discharge the impurities, thereby keeping the inside of the water storage tank 1 clean and preventing impurities from affecting the use effect and service life of the water heater.

[0029] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making creative work should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention are implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. An air source heat pump water heater with a waste heat recovery structure, comprising: A water storage tank (1), wherein a heat pump main unit (2) is provided on the outside of the water storage tank (1), a return pipe (4) is fixedly connected to the top end of the water storage tank (1), a water supply pipe (5) is fixedly connected to the bottom end of the water storage tank (1), the water supply pipe (5) extends into the interior of the water storage tank (1), and a circulating water pump (6) is fixedly connected to the outer wall of the water supply pipe (5), characterized in that a recovery device (3) is fixedly connected to the outer wall of the heat pump main unit (2), an adjustment device (8) is provided on the top end of the interior of the water storage tank (1), and a cleaning device (7) is provided on the bottom end of the interior of the water storage tank (1); The recovery device (3) comprises an air collecting hood (31), an air collecting ring (32) is symmetrically fixedly connected to the inner wall of the air collecting hood (31), a spiral air guide tube (35) is fixedly connected to the inner wall of the air collecting hood (31), a water receiving ring tube (36) is provided at the top end of the spiral air guide tube (35), a water supply ring tube (37) is provided at the bottom end of the spiral air guide tube (35), and a heating tube (38) is provided at the inner center of the spiral air guide tube (35); The regulating device (8) comprises a water inlet pipe (81), the bottom end of the water inlet pipe (81) is fixedly connected to a bellows (84), the bottom end of the bellows (84) is fixedly connected to a water collecting block (85), the outer wall of the water collecting block (85) is fixedly connected to a connecting pipe (86), the outer wall of the water collecting block (85) is fixedly connected to a limiting rod (82), and the inner wall of the water collecting block (85) is threadedly connected to an regulating screw (83).

2. The air source heat pump water heater with waste heat recovery structure according to claim 1, characterized in that: The outer wall of the wind collecting cover (31) is fixedly connected to the outer wall of the heat pump main unit (2); the outer wall of the spiral air guide pipe (35) is fixedly connected to the tapered pipe (39); the top end of the heating pipe (38) is fixedly connected to the outer wall of the water receiving ring pipe (36); and the end of the heating pipe (38) away from the water receiving ring pipe (36) is fixedly connected to the outer wall of the water supply ring pipe (37).

3. The air source heat pump water heater with waste heat recovery structure according to claim 2, characterized in that: The outer wall of the conical tube (39) is fixedly connected to the inner wall of the wind collecting cover (31), the outer wall of the water receiving ring tube (36) is fixedly connected to the external pipe (33), and the outer wall of the water supply ring tube (37) is fixedly connected to the delivery pipe (34).

4. The air source heat pump water heater with waste heat recovery structure according to claim 3, characterized in that: The outer walls of the external pipe (33) and the delivery pipe (34) are both fixedly connected to the inner wall of the wind collecting cover (31); the end of the external pipe (33) away from the water receiving ring pipe (36) is fixedly connected to the outer wall of the water delivery pipe (5); and the end of the delivery pipe (34) away from the water delivery ring pipe (37) is fixedly connected to the inner wall of the water storage tank (1).

5. The air source heat pump water heater with waste heat recovery structure according to claim 1, characterized in that: The outer wall of the water inlet pipe (81) is fixedly connected to the inner wall of the water storage tank (1), the outer wall of the limit rod (82) is slidably connected to the inner wall of the water storage tank (1), the outer wall of the adjusting screw (83) is rotatably connected to the inner wall of the water storage tank (1), and the outer wall of the water inlet pipe (81) is provided with an adjusting motor (89).

6. The air source heat pump water heater with a waste heat recovery structure according to claim 5, characterized in that: The outer wall of the regulating motor (89) is fixedly connected to the outer wall of the water storage tank (1), the outer wall of the regulating screw (83) is fixedly connected to the output end of the regulating motor (89), the inner wall of the connecting pipe (86) is slidably connected to a blocking rod (87), and the bottom end of the blocking rod (87) is fixedly connected to a float (88).

7. The air source heat pump water heater with a waste heat recovery structure according to claim 1, characterized in that: The cleaning device (7) comprises a filter housing (71), the inner wall of the filter housing (71) is rotatably connected to a rotating rod (73), the outer wall of the rotating rod (73) is fixedly connected to an impeller (72), the top end of the rotating rod (73) is fixedly connected to a scraper (74), and a sewage discharge pipe (76) is provided on the outside of the filter housing (71).

8. The air source heat pump water heater with a waste heat recovery structure according to claim 7, characterized in that: The bottom end of the filter housing (71) is fixedly connected to the inner wall of the water storage tank (1), the outer wall of the rotating rod (73) is rotatably connected to the inner wall of the water storage tank (1), the outer wall of the scraper (74) is slidably connected to the inner wall of the water storage tank (1), and the outer wall of the filter housing (71) is fixedly connected to the outer wall of the water supply pipe (5).

9. The air source heat pump water heater with a waste heat recovery structure according to claim 7, characterized in that: The bottom end of the scraper (74) is fixedly connected to a brush head (75), the outer wall of the brush head (75) is slidably connected to the inner wall of the water storage tank (1), and the outer wall of the sewage pipe (76) is fixedly connected to the inner wall of the water storage tank (1).

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