Air source heat pump domestic hot water system self-cleaning filter device

Abstract

This utility model discloses a self-cleaning filter device for an air source heat pump domestic hot water system, including a cold water inlet installed on the surface of the air source heat pump. The inner cavity of the cold water inlet is connected to an inlet pipe. An insulated water tank is provided on the left side of the air source heat pump. An outlet pipe is connected to the surface of the insulated water tank. A filter assembly is provided between the outlet pipe and the inlet pipe. The fourth, fifth, and sixth solenoid valves are closed, while the first, second, and third solenoid valves are kept open, allowing water to flow through the outlet and inlet pipes. When too many impurities accumulate in the inner cavity of the tubular screen, the first, second, and third solenoid valves are closed, and the fourth, fifth, and sixth solenoid valves are opened. Then, the combined action of the inner support ring and the water flow causes the impurities to flow into the inner cavity of the bent pipe, thereby flushing the impurities out of the filter device.

Description

Technical Field

[0001] This utility model belongs to the field of electromechanical engineering technology, and in particular relates to a self-cleaning filter device for an air source heat pump domestic hot water system. Background Technology

[0002] An air source heat pump, also known as an air energy heat pump, is a device that uses a reverse thermodynamic cycle to transfer heat from a low-temperature heat source to a high-temperature heat source. Because air source heat pumps can centrally supply hot water to meet the simultaneous water demand of a large number of guest rooms, they are commonly used in commercial and public buildings.

[0003] Adding a filter to the hot water circulation system of an air source heat pump and insulated water tank is a key step in ensuring the system's efficient and stable operation. If the filter is not cleaned after prolonged use, the internal filter screen will become clogged, resulting in a decrease in filtration efficiency. Traditional maintenance methods involve completely disassembling the filter, but repeated disassembly can cause irreversible damage to the water pipes. Furthermore, if subsequent installation is flawed, such as uneven wrapping of the PTFE tape, leaks can occur between the water pipes and the filter. To achieve a "self-cleaning" effect for the filter, a self-cleaning filter device for air source heat pump domestic hot water systems has been designed. This device, through the cooperation of multiple water pipes and solenoid valves, enables water circulation flushing inside the filter, removing impurities from the filter screen and thus avoiding the adverse effects of repeated disassembly and reassembly of the filter and water pipes, which reduces the overall lifespan of the hot water circulation system. Utility Model Content

[0004] The purpose of this invention is to provide a self-cleaning filter device for an air source heat pump domestic hot water system. This device has the advantage of enabling water circulation flushing inside the filter device, which can flush out impurities from the filter screen. This solves the problem of reduced overall service life of the hot water circulation system due to repeated disassembly and maintenance between the filter and the water pipe.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A self-cleaning filter device for an air source heat pump domestic hot water system includes a cold water inlet installed on the surface of the air source heat pump; the inner cavity of the cold water inlet is connected to an inlet pipe; an insulated water tank is provided on the left side of the air source heat pump; an outlet pipe is connected to the surface of the insulated water tank; a filter assembly is provided between the outlet pipe and the inlet pipe; the filter assembly includes a water storage cylinder disposed between the inlet pipe and the outlet pipe; an inner supporting ring is installed in the inner cavity of the water storage cylinder; a tubular screen is welded to the bottom of the inner supporting ring; an inlet is connected to the left side of the surface of the water storage cylinder; an outlet is connected to the right side of the surface of the water storage cylinder; the inlet is connected to the outlet pipe; the outlet is connected to the inlet pipe; a U-shaped connecting pipe is connected to the surface of the inlet pipe and the outlet pipe; and a bend is connected to the bottom of the surface of the inlet. The system includes a pipe assembly with valve components on the surfaces of the inlet pipe, outlet pipe, and filter assembly. Each valve component includes a first solenoid valve installed on the outlet pipe, a second solenoid valve on the surface of the inlet pipe, a third solenoid valve on the surface of the inlet, a fourth solenoid valve on the surface of the bent pipe, a fifth solenoid valve on the left side of the surface of the U-shaped connecting pipe, and a sixth solenoid valve on the right side of the surface of the U-shaped connecting pipe. An inner support pipe connects to the bottom of the inner cavity of the water storage tank, and the top of the inner support pipe connects to the bottom of the tubular screen. A filter cake pushing assembly is installed inside the water storage tank, and a power assembly is installed at the bottom of the water storage tank. A hot water outlet is installed on the surface of the air heat pump, located directly above the cold water inlet. A connecting pipe connects the hot water outlet to the insulated water tank, and a water supply pipe connects to the right side of the surface of the insulated water tank.

[0006] The self-cleaning filter device for an air source heat pump domestic hot water system described above is further described in the present invention as follows: the filter residue pushing component includes a disc branch pipe welded to the bottom of the inner cavity of the water storage tank, the bottom end of the disc branch pipe extending through an inner support pipe to the bottom of the water storage tank, a cylinder slidably connected to the inner cavity of the disc branch pipe, and a disc fixedly connected to the top end of the cylinder by bolts.

[0007] The self-cleaning filter device for an air source heat pump domestic hot water system described above is further characterized by: the surface of the disc being slidably connected to the inner cavity of the tubular screen; a water-blocking ring being welded to the bottom of the disc; a water-blocking groove being formed on the top surface of the disc branch pipe; and the surface of the water-blocking ring being slidably connected to the inner cavity of the water-blocking groove.

[0008] The self-cleaning filter device for an air source heat pump domestic hot water system described above further includes: a cylinder slidably connected to the inner cavity of the disc branch pipe; a disc fixedly connected to the top of the cylinder by bolts; the surface of the disc slidably connected to the inner cavity of the tubular screen; a water-blocking ring welded to the bottom of the disc; a water-blocking groove formed on the top surface of the disc branch pipe; and the surface of the water-blocking ring slidably connected to the inner cavity of the water-blocking groove.

[0009] The self-cleaning filter device for an air source heat pump domestic hot water system described above is further characterized by: an annular groove on the surface of the bottom end of the disc branch pipe; a reinforcing ring fixedly connected to the bottom of the water storage tank by bolts; a fixing ring welded to the inner cavity of the reinforcing ring; the surface of the fixing ring fixedly connected to the inner cavity of the annular groove; and a power assembly including a support frame disposed at the bottom of the water storage tank, the support frame being fixedly connected to the ground by bolts.

[0010] The self-cleaning filter device for an air source heat pump domestic hot water system described above is further provided in the following way: a servo motor is installed in the inner cavity of the waterproof shell, and a gear is fixedly connected to the output shaft of the servo motor through a flange. A rectangular groove is provided on the right side of the cylindrical surface, and a rack is welded into the inner cavity of the rectangular groove. The surface of the rack meshes with the gear.

[0011] The self-cleaning filter device for an air source heat pump domestic hot water system described above is further provided in that: a limiting groove is provided on the left side of the cylindrical surface, and a tripod is provided at the bottom of the water storage tank, and the tripod is fixedly connected to the ground by bolts.

[0012] The self-cleaning filter device for an air source heat pump domestic hot water system described above is further characterized by: a guide strip being fixedly connected to the right side of the tripod by bolts; the surface of the guide strip being slidably connected to the inner cavity of the reinforcing ring; and a bracket being fixedly connected to the surface of the water storage tank by bolts.

[0013] The self-cleaning filter device for an air source heat pump domestic hot water system described above is further characterized by the following: the bracket is fixedly connected to the ground by bolts, and water pipe supports are provided on the surfaces of the inlet pipe, outlet pipe, and U-shaped connecting pipe, and the water pipe supports are fixedly connected to the ground by bolts.

[0014] The beneficial effects of this utility model are:

[0015] This invention keeps the first, second, and third solenoid valves open, allowing water to flow smoothly through the outlet and inlet pipes into the inner cavity of the water storage tank. When too many impurities accumulate in the inner cavity of the tubular screen, the fourth, fifth, and sixth solenoid valves are opened, allowing water to flow back into the inner cavity of the water storage tank. The water then flows through the outlet pipe and the U-shaped connecting pipe into the inner cavity of the water storage tank, flushing the impurities on the surface of the tubular screen into its inner cavity. Subsequently, the power assembly is activated to push the impurities to the top of the tubular screen. Then, the combined action of the inner support ring and the water flow causes the impurities to flow into the inner cavity of the bent pipe, ultimately flushing them out of the filter device. Attached Figure Description

[0016] The advantages of the present invention, as described above and / or in the following detailed description in conjunction with the accompanying drawings, will become clearer and more readily understood. These drawings are merely illustrative and do not limit the scope of the present invention.

[0017] Figure 1 This is a rear view schematic diagram of the main body of one embodiment of the present utility model;

[0018] Figure 2 This is a rear view schematic diagram of a water pipe according to an embodiment of the present invention;

[0019] Figure 3 This is a front view schematic diagram of a water pipe according to an embodiment of the present invention;

[0020] Figure 4 This is a front view of a water pipe according to an embodiment of the present invention.

[0021] Figure 5 This is a schematic cross-sectional view of a water storage cylinder according to an embodiment of the present invention;

[0022] Figure 6 This is a cross-sectional view of a water storage cylinder according to an embodiment of the present invention.

[0023] Figure 7 This is one embodiment of the present utility model. Figure 6 A magnified view of a portion of the image;

[0024] Figure 8 This is one embodiment of the present utility model. Figure 5 A magnified view of point A in the middle.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. Air source heat pump; 2. Cold water inlet; 3. Inlet pipe; 4. Insulated water tank; 5. Outlet pipe; 6. Filter assembly; 61. Water storage tank; 62. Inner support ring; 63. Tubular screen; 64. Inlet; 65. Outlet; 7. U-shaped connecting pipe; 8. Bend pipe; 9. Valve assembly; 91. First solenoid valve; 92. Second solenoid valve; 93. Third solenoid valve; 94. Fourth solenoid valve; 95. Fifth solenoid valve; 96. Sixth solenoid valve; 10. Inner support pipe; 11. Filter residue propulsion assembly; 111 112. Circular branch pipe, 113. Cylindrical, 114. Circular, 115. Water-blocking ring, 116. Water-blocking groove, 117. Annular groove, 118. Reinforcing ring, 12. Fixing ring, 12. Power component, 121. Support frame, 122. Waterproof shell, 123. Servo motor, 124. Gear, 125. Rectangular groove, 126. Rack, 127. Limiting groove, 13. Hot water outlet, 14. Connecting pipe, 15. Water supply pipe, 16. Tripod, 17. Guide bar, 18. Bracket, 19. Water pipe bracket. Detailed Implementation

[0027] In the following description, embodiments of the self-cleaning filter device for an air-source heat pump domestic hot water system of the present invention will be described with reference to the accompanying drawings.

[0028] The embodiments described herein are specific implementations of this utility model, used to illustrate the concept of this utility model. They are all illustrative and exemplary, and should not be construed as limiting the implementation methods or scope of this utility model. In addition to the embodiments described herein, those skilled in the art can employ other obvious technical solutions based on the content disclosed in the claims and specification of this application. These technical solutions include those that make any obvious substitutions and modifications to the embodiments described herein.

[0029] The accompanying drawings in this specification are schematic diagrams used to illustrate the concept of this utility model, and schematically show the shapes of the various parts and their interrelationships. Please note that, in order to clearly show the structure of the components of the embodiments of this utility model, the drawings are not drawn to the same scale. The same reference numerals are used to indicate the same parts.

[0030] Example 1: Figure 1-8This invention illustrates a self-cleaning filter device for an air-source heat pump domestic hot water system according to an embodiment of the present invention. The device includes: a cold water inlet 2 installed on the surface of an air-source heat pump 1; an inlet pipe 3 connected to the inner cavity of the cold water inlet 2; an insulated water tank 4 located on the left side of the air-source heat pump 1; an outlet pipe 5 connected to the surface of the insulated water tank 4; a filter assembly 6 disposed between the outlet pipe 5 and the inlet pipe 3; the filter assembly 6 includes a water storage cylinder 61 disposed between the inlet pipe 3 and the outlet pipe 5; an inner support ring 62 installed in the inner cavity of the water storage cylinder 61; a tubular screen 63 welded to the bottom of the inner support ring 62; an inlet 64 connected to the outlet pipe 5; a bent pipe 8 connected to the bottom of the surface of the inlet 64; a fourth solenoid valve 94 installed on the surface of the bent pipe 8; and an outlet 65 connected to the inlet pipe 5. Water pipe 3 is connected, water inlet 64 is connected to water outlet 5, tubular screen 63 is welded to the bottom of inner support ring 62, water inlet 64 is connected to the left side of water storage cylinder 61, water outlet 65 is connected to the right side of water storage cylinder 61, water outlet 65 is connected to water inlet 3, inner support pipe 10 is connected to the bottom of inner cavity of water storage cylinder 61, top of inner support pipe 10 is connected to bottom of tubular screen 63, filter cake pushing assembly 11 includes disc branch pipe 111 welded to the bottom of inner cavity of water storage cylinder 61, cylinder 112 is slidably connected to inner cavity of disc branch pipe 111, disc 113 is fixedly connected to top of cylinder 112 by bolt, fixing ring 118 is welded to inner cavity of reinforcing ring 117, and fixing ring 118 is fixedly connected to annular groove 116 on surface. The inner cavity of the cylindrical screen 63 is slidably connected to the inner cavity of the cylindrical screen 63. A water-blocking ring 114 is welded to the bottom of the cylindrical screen 113. The bottom end of the cylindrical support pipe 111 passes through the inner support pipe 10 to the bottom of the water storage tank 61. A water-blocking groove 115 is opened on the top surface of the cylindrical support pipe 111. The surface of the water-blocking ring 114 is slidably connected to the inner cavity of the water-blocking groove 115. An annular groove 116 is opened on the bottom surface of the cylindrical support pipe 111. A reinforcing ring 117 is fixedly connected to the bottom of the water storage tank 61 by bolts. The power assembly 12 includes a support frame 121 set at the bottom of the water storage tank 61. The support frame 121 is fixedly connected to the ground by bolts. The water inlet 64 is connected to the water outlet pipe 5. The water outlet 65 is connected to the water inlet pipe 3. The water inlet pipe 3 and the water outlet pipe 5 are connected to the water outlet pipe 5. A U-shaped connecting pipe 7 is connected to the surface of pipe 5. A bent pipe 8 is connected to the bottom of the surface of inlet 64. Valve assemblies 9 are provided on the surfaces of inlet pipe 3, outlet pipe 5, and filter assembly 6. Valve assembly 9 includes a first solenoid valve 91 installed with outlet pipe 5, a second solenoid valve 92 installed on the surface of inlet pipe 3, a third solenoid valve 93 installed on the surface of inlet 64, a fourth solenoid valve 94 installed on the surface of bent pipe 8, a fifth solenoid valve 95 installed on the left side of the surface of U-shaped connecting pipe 7, and a sixth solenoid valve 96 installed on the right side of the surface of U-shaped connecting pipe 7. An inner support pipe 10 is connected to the bottom of the inner cavity of water storage tank 61, and the top of the inner support pipe 10 is connected to the bottom of tubular screen 63. A filter cake pushing assembly 11 is provided in the inner cavity of water storage tank 61.A power unit 12 is installed at the bottom of the water storage tank 61. A hot water outlet 13 is installed on the surface of the air heat source pump 1, located directly above the cold water inlet 2. A connecting pipe 14 connects the hot water outlet 13 to the insulated water tank 4. A water supply pipe 15 is connected to the right side of the surface of the insulated water tank 4.

[0031] By adopting the above solution: the present invention, through the combined use of the annular groove 116, the reinforcing ring 117 and the fixing ring 118, can make the disc branch pipe 111 obtain a reinforced fixing force in the inner cavity of the tubular screen 63, which can prevent the disc branch pipe 111 from detaching from the bottom of the inner cavity of the tubular screen 63 due to the impact of water flow.

[0032] Example 2: Reference Figure 6 and Figure 7 The surface of the disc 113 is slidably connected to the inner cavity of the tubular screen 63. A water-blocking ring 114 is welded to the bottom of the disc 113. A water-blocking groove 115 is opened on the top surface of the disc branch pipe 111. The surface of the water-blocking ring 114 is slidably connected to the inner cavity of the water-blocking groove 115. A waterproof shell 122 is fixedly connected to the top of the support frame 121 by bolts. A servo motor 123 is installed in the inner cavity of the waterproof shell 122. A gear 124 is fixedly connected to the output shaft of the servo motor 123 by a flange. A rectangular groove 125 is opened on the right side of the surface of the cylinder 112. A rack 126 is welded to the inner cavity of the rectangular groove 125. The surface of the rack 126 meshes with the gear 124. A limit groove 127 is opened on the left side of the surface of the cylinder 112. Air heat source pump. A hot water outlet 13 is installed on the surface of the water tank 1, which is located directly above the cold water inlet 2. A connecting pipe 14 connects the hot water outlet 13 to the insulated water tank 4. A water supply pipe 15 is connected to the right side of the surface of the insulated water tank 4. A tripod 16 is installed at the bottom of the water tank 61. The tripod 16 is fixed to the ground by bolts. A guide strip 17 is fixed to the right side of the tripod 16 by bolts. The surface of the guide strip 17 is slidably connected to the inner cavity of the reinforcing ring 117. A bracket 18 is fixed to the surface of the water tank 61 by bolts. The bracket 18 is fixed to the ground by bolts. Water pipe brackets 19 are installed on the surfaces of the inlet pipe 3, outlet pipe 5 and U-shaped connecting pipe 7. The water pipe brackets 19 are fixed to the ground by bolts.

[0033] By adopting the above solution: the present invention, through the combined use of the water-blocking ring 114 and the water-blocking groove 115, can achieve a better sealing effect between the bottom of the disc 113 and the top of the disc branch pipe 111 when the water flows into the inner cavity of the water storage cylinder 61, thus preventing the water from flowing out of the inner cavity of the water storage cylinder 61 through the disc branch pipe 111.

[0034] Working Principle: When using this invention, the user closes the fourth solenoid valve 94, the fifth solenoid valve 95, and the sixth solenoid valve 96, while keeping the first solenoid valve 91, the second solenoid valve 92, and the third solenoid valve 93 open. This allows water to flow smoothly through the outlet pipe 5 and the inlet pipe 3 into the inner cavity of the water storage tank 61. When the water enters the inner cavity of the water storage tank 61, impurities in the water are intercepted in the inner cavity of the tubular screen 63, and under the action of the inner support ring 62, prevents... Unfiltered water flows directly into the inner cavity of outlet 65. When excessive impurities accumulate in the inner cavity of tubular screen 63, the first solenoid valve 91, the second solenoid valve 92, and the third solenoid valve 93 are closed, while the fourth solenoid valve 94, the fifth solenoid valve 95, and the sixth solenoid valve 96 are opened. This allows water to flow back into the inner cavity of water storage tank 61. Furthermore, because the first solenoid valve 91 and the second solenoid valve 92 are closed, water is prevented from flowing back into the inner cavity of outlet pipe 5 and out of the inner cavity of inlet pipe 3. The process begins with water flowing through the outlet pipe 5 and then through the U-shaped connecting pipe 7 into the inner cavity of the water storage tank 61. This flushes impurities from the surface of the tubular screen 63 into the inner cavity of the tubular screen 63, facilitating subsequent removal of the impurities. Subsequently, the servo motor 123 is activated, driving the gear 124 to rotate. Under the meshing action, the gear 126 pushes the cylinder 112 upward and simultaneously pushes the disc 113 upward, pushing the impurities in the inner cavity of the tubular screen 63 to the top of the tubular screen 63. This allows the water flow to flush the impurities out of the inner cavity of the tubular screen 63. At the same time, the inner support ring 62 acts as a barrier to impurities. Under the action of the water flow, the impurities flow into the inner cavity of the inlet 64 and into the inner cavity of the bend pipe 8 until they are discharged from the inner cavity of the bend pipe 8. This flushes the impurities out of the filter device, thus avoiding the adverse effect of reduced overall service life of the hot water circulation system due to repeated disassembly and maintenance between the filter and the water pipe.

[0035] In summary, the self-cleaning filter of this air source heat pump domestic hot water system closes the fourth solenoid valve 94, the fifth solenoid valve 95, and the sixth solenoid valve 96, while keeping the first solenoid valve 91, the second solenoid valve 92, and the third solenoid valve 93 open. This allows water to flow smoothly through the outlet pipe 5 and the inlet pipe 3 into the inner cavity of the water storage tank 61. When too many impurities accumulate in the inner cavity of the tubular screen 63, the first solenoid valve 91, the second solenoid valve 92, and the third solenoid valve 93 are closed, and the fourth solenoid valve 94, the fifth solenoid valve 95, and the sixth solenoid valve 96 are opened, allowing water to flow back into the inner cavity of the water storage tank 61, thereby flushing the impurities out of the filter.

[0036] The technical features disclosed above are not limited to the combinations of the disclosed features with other features. Those skilled in the art can also make other combinations of the technical features according to the purpose of the utility model in order to achieve the purpose of the utility model.

Claims

1. An air source heat pump domestic hot water system self-cleaning filter device, characterized in that, Includes a cold water inlet (2) installed on the surface of the air heat source pump (1): the inner cavity of the cold water inlet (2) is connected to an inlet pipe (3), an insulated water tank (4) is provided on the left side of the air heat source pump (1), an outlet pipe (5) is connected to the surface of the insulated water tank (4), a filter assembly (6) is provided between the outlet pipe (5) and the inlet pipe (3), the filter assembly (6) includes a water storage cylinder (61) provided between the inlet pipe (3) and the outlet pipe (5), an inner support ring (62) is installed in the inner cavity of the water storage cylinder (61), an inlet (64) is connected to the left side of the surface of the water storage cylinder (61), an outlet (65) is connected to the right side of the surface of the water storage cylinder (61), the inlet pipe (3) and the outlet pipe (64) are connected to the inlet pipe (64) and the outlet pipe (65 ... 5) The surfaces of the water inlet pipe (3), the water outlet pipe (5) and the filter assembly (6) are all connected by a U-shaped connecting pipe (7). The surfaces of the water inlet pipe (3), the water outlet pipe (5) and the filter assembly (6) are all provided with valve assemblies (9). The valve assembly (9) includes a first solenoid valve (91) installed with the water outlet pipe (5), a second solenoid valve (92) installed on the surface of the water inlet pipe (3), a third solenoid valve (93) installed on the surface of the water inlet (64), a fifth solenoid valve (95) installed on the left side of the surface of the U-shaped connecting pipe (7), and a sixth solenoid valve (96) installed on the right side of the surface of the U-shaped connecting pipe (7). The inner cavity of the water storage tank (61) is provided with a filter cake pushing assembly (11), and the bottom of the water storage tank (61) is provided with a power assembly (12).

2. The self-cleaning filter device of an air source heat pump domestic hot water system according to claim 1, characterized in that, The bottom of the inner support ring (62) is welded with a tubular screen (63), the inlet (64) is connected to the outlet pipe (5), the bottom of the surface of the inlet (64) is connected to a bent pipe (8), the surface of the bent pipe (8) is equipped with a fourth solenoid valve (94), and the outlet (65) is connected to the inlet pipe (3).

3. The self-cleaning filter device of an air source heat pump domestic hot water system according to claim 2, characterized in that, The bottom of the inner cavity of the water storage cylinder (61) is connected to an inner support pipe (10), and the top of the inner support pipe (10) is connected to the bottom of the tubular screen (63). The filter residue pushing assembly (11) includes a disc branch pipe (111) welded to the bottom of the inner cavity of the water storage cylinder (61). The bottom end of the disc branch pipe (111) passes through the inner support pipe (10) to the bottom of the water storage cylinder (61).

4. The self-cleaning filter device of an air source heat pump domestic hot water system according to claim 3, characterized in that, The inner cavity of the disc branch pipe (111) is slidably connected to a cylinder (112), and the top of the cylinder (112) is fixedly connected to a disc (113) by bolts. The surface of the disc (113) is slidably connected to the inner cavity of the tubular screen (63). A water-blocking ring (114) is welded to the bottom of the disc (113). A water-blocking groove (115) is opened on the top surface of the disc branch pipe (111), and the surface of the water-blocking ring (114) is slidably connected to the inner cavity of the water-blocking groove (115).

5. The self-cleaning filter device of an air source heat pump domestic hot water system according to claim 4, characterized in that, The bottom surface of the disc branch pipe (111) is provided with an annular groove (116). The bottom of the water storage tank (61) is fixedly connected with a reinforcing ring (117) by bolts. A fixing ring (118) is welded to the inner cavity of the reinforcing ring (117). The surface of the fixing ring (118) is fixedly connected to the inner cavity of the annular groove (116). The power assembly (12) includes a support frame (121) set at the bottom of the water storage tank (61). The support frame (121) is fixedly connected to the ground by bolts.

6. The self-cleaning filter device for an air source heat pump domestic hot water system according to claim 5, characterized in that, The top of the support frame (121) is fixedly connected to a waterproof shell (122) by bolts. A servo motor (123) is installed in the inner cavity of the waterproof shell (122). The output shaft of the servo motor (123) is fixedly connected to a gear (124) by a flange. A rectangular groove (125) is opened on the right side of the surface of the cylinder (112). A rack (126) is welded to the inner cavity of the rectangular groove (125). The surface of the rack (126) meshes with the gear (124).

7. A self-cleaning filter device for an air source heat pump domestic hot water system according to claim 6, characterized in that, A limiting groove (127) is provided on the left side of the surface of the cylinder (112). A hot water outlet (13) is installed on the surface of the air heat source pump (1). The hot water outlet (13) is located directly above the cold water inlet (2). A connecting pipe (14) connects the hot water outlet (13) to the insulated water tank (4). A water supply pipe (15) connects to the right side of the surface of the insulated water tank (4).

8. A self-cleaning filter device for an air source heat pump domestic hot water system according to claim 7, characterized in that, The bottom of the water storage tank (61) is provided with a tripod (16), which is fixedly connected to the ground by bolts. The right side of the tripod (16) is fixedly connected with a guide strip (17) by bolts. The surface of the guide strip (17) is slidably connected to the inner cavity of the reinforcing ring (117). The surface of the water storage tank (61) is fixedly connected with a bracket (18) by bolts.

9. A self-cleaning filter device for an air source heat pump domestic hot water system according to claim 8, characterized in that, The bracket (18) is fixedly connected to the ground by bolts. The surfaces of the inlet pipe (3), outlet pipe (5) and U-shaped connecting pipe (7) are all provided with water pipe brackets (19), and the water pipe brackets (19) are fixedly connected to the ground by bolts.

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