Water taking and filtering system of sewage source heat pump

Abstract

The utility model belongs to the field of sewage source heat pump filtration, and provides a water taking and filtering system of a sewage source heat pump. Comprising a pool body, a sewage inlet and a heat pump water return port which are formed in the two opposite sides of the top end of the pool body, and a sewage water return port and a clear water outlet which are formed in the two opposite sides of the bottom end of the pool body and are vertically opposite to the sewage inlet and the heat pump water return port respectively, the primary filtering part comprises a filtering box arranged on the upper side of the sewage inlet, a filtering net plate arranged on the inner side of the filtering box, a mounting plate arranged on the inner side of the filtering box and a rotating disc rotationally arranged on one side of the mounting plate; according to the utility model, the water retaining walls and the filtering walls are arranged to divide the tank body into a plurality of water areas, so that the effective separation of raw sewage, recession water and clear water is realized, the filtering and purifying efficiency is improved, and the water utilization requirements under different working conditions are met by controlling the opening and closing of each valve and flexibly adjusting the water flow path.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater source heat pump filtration, specifically a wastewater source heat pump water intake filtration system. Background Technology

[0002] With the acceleration of urbanization, the problem of water scarcity has become increasingly prominent, especially in some arid or semi-arid regions, where traditional freshwater resources can no longer meet the growing water demand. To alleviate this problem, people have begun to explore the use of various non-traditional water sources, among which wastewater source heat pump systems have attracted attention because they can effectively utilize the low-grade heat energy in urban wastewater.

[0003] Wastewater source heat pump systems extract heat energy from wastewater to provide heating or cooling for buildings, thus achieving efficient energy utilization. However, wastewater contains a large amount of suspended solids, organic matter, microorganisms, and other impurities. If these impurities are not effectively treated, they will seriously affect the operating efficiency and service life of the heat pump system. Therefore, developing a water intake filtration system that can effectively filter impurities from wastewater is particularly important.

[0004] To address the problems raised in the background art, those skilled in the art have proposed a wastewater source heat pump water intake filtration system. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a wastewater source heat pump water intake and filtration system to solve the problems in the prior art.

[0006] A wastewater source heat pump water intake and filtration system includes a pool body, a wastewater inlet and a heat pump outlet located on opposite sides of the top of the pool body, and a wastewater outlet and a clean water outlet located on opposite sides of the bottom of the pool body and respectively arranged above and below the wastewater inlet and the heat pump outlet.

[0007] A primary filter element is provided on the upper side of the sewage inlet. The primary filter element includes a filter box located on the upper side of the sewage inlet, a filter screen plate located inside the filter box, a mounting plate located inside the filter box, a turntable rotatably located on one side of the mounting plate, a swing plate rotatably located on one side of the turntable, a through groove opened on one side of the swing plate, a limiting strip located on one side of the turntable, a limiting groove located on one side of the mounting plate, and a moving block slidably located in the limiting groove. One end of the swing plate is connected to the moving block.

[0008] A connecting plate is provided at one end of the movable block, and a scraper is provided at the lower end of the connecting plate. The scraper is in contact with the filter screen.

[0009] A water-retaining wall is horizontally arranged in the middle of the pool, with its two ends facing each water outlet. The top of the water-retaining wall is provided with a first valve and a second valve, respectively, corresponding to the positions of the sewage inlet and the heat pump outlet. The bottom of the water-retaining wall is provided with a third valve and a fourth valve, respectively, corresponding to the positions of the sewage outlet and the clean water outlet.

[0010] Preferably, the filter screen is provided with a drain trough on both sides, a flow guide plate is provided on the lower side of the filter screen, a fixing plate is fixedly connected to the inner walls of both sides of the filter box, a sludge collection box is slidably provided on the upper side of the fixing plate, and a number of evenly distributed drainage holes are provided on the peripheral side of the sludge collection box.

[0011] Preferably, a filter wall extending longitudinally along the pool body is provided on both sides of the water-retaining wall. The two filter walls and the water-retaining wall divide the pool body into a first water zone, a second water zone, a third water zone, and a fourth water zone. The first and second water zones are located on the side of the filter wall closer to the sewage inlet and sewage outlet, respectively, while the third and fourth water zones are located on the side of the filter wall closer to the heat pump outlet and clean water outlet, respectively. The first and third water zones are located on the same side of the water-retaining wall, as are the second and fourth water zones. A first valve controls the sewage inlet... The first valve controls the connection and disconnection with the first and second water zones, and the sewage inlet is not simultaneously connected to the first and second water zones; the second valve controls the connection and disconnection with the heat pump outlet and the third and fourth water zones, and the heat pump outlet is not simultaneously connected to the third and fourth water zones; the third valve controls the connection and disconnection with the sewage outlet and the first and second water zones, and the sewage outlet is not simultaneously connected to the first and second water zones; the fourth valve controls the connection and disconnection with the clean water outlet and the third and fourth water zones, and the clean water outlet is not simultaneously connected to the third and fourth water zones.

[0012] Preferably, when the sewage inlet is connected to the second water zone, the first water zone is a restoration zone, the second water zone is a raw water zone, the third water zone is a drainage zone, and the fourth water zone is a clean water zone; when the sewage inlet is connected to the first water zone, the first water zone is a raw water zone, the second water zone is a restoration zone, the third water zone is a clean water zone, and the fourth water zone is a drainage zone.

[0013] Preferably, the water-retaining wall has a heat insulation layer extending longitudinally in the middle.

[0014] Preferably, the filter wall includes a sand and gravel filter layer located in its middle and two sand-free concrete filter layers located on both sides of the sand and gravel filter layer.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. This utility model achieves preliminary filtration and removal of large impurities in raw sewage by setting up a primary filter element, including a filter box, a filter screen, a rotating turntable, a swing plate, and a scraper in contact with the filter screen. At the same time, the scraper can effectively remove impurities on the filter screen, avoiding clogging of the filter screen, thereby significantly improving filtration efficiency.

[0017] 2. The wastewater source heat pump's water intake filtration system in this utility model can supply clean water to the heat pump, preventing dirt from clogging it. Furthermore, the wastewater source heat pump's water intake filtration system has a simple structure, employing natural infiltration and multi-stage, multi-layer filter surfaces to improve wastewater utilization efficiency. It eliminates the need for anti-blocking machines, wastewater separators, and other equipment, saving costs.

[0018] 3. This utility model divides the pool into multiple water zones by setting up water-blocking walls and filter walls, achieving effective separation of raw sewage, effluent, and clean water. This design not only improves the efficiency of filtration and purification, but also allows for flexible adjustment of the water flow path by controlling the opening and closing of various valves, thus meeting the water demand under different working conditions. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the top cross-section of the water intake filtration system of the wastewater source heat pump of this utility model;

[0020] Figure 2 This is a schematic diagram of the filter box in this utility model;

[0021] Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle;

[0022] Figure 4 for Figure 1 Schematic diagram of the bottom cross-section of the water intake filtration system;

[0023] Figure 5 for Figure 4 Schematic diagram of the longitudinal section of the water intake filtration system along line AA;

[0024] Figure 6 for Figure 4 Schematic diagram of the longitudinal section of the water intake filtration system along line BB;

[0025] Figure 7 for Figure 1 A schematic diagram of the top cross-section of the valve changing to another water intake state;

[0026] Figure 8 for Figure 4 The valve changes to make it in the same position as Figure 7 A schematic diagram of the bottom cross-section under the same water intake conditions;

[0027] Figure 9 for Figure 6 Schematic diagram of the longitudinal section of the water intake filtration system along line AA;

[0028] Figure 10 for Figure 6 A schematic diagram of the longitudinal section of the water intake filtration system along line BB.

[0029] In the picture:

[0030] 10. Pool body; 11. First side; 12. Second side; 13. First end face; 15. Second end face; 16. First water zone; 17. Second water zone; 18. Third water zone; 19. Fourth water zone; 20. Sewage inlet; 25. First valve; 30. Heat pump outlet; 35. Second valve; 40. Sewage outlet; 45. Third valve; 50. Clear water outlet; 55. Fourth valve; 60. Water retaining wall; 61. 70. Insulation layer; 71. Pre-filter element; 72. Filter box; 73. Filter screen; 74. Mounting plate; 75. Turntable; 76. Swinging plate; 77. Through groove; 78. Limiting strip; 79. Limiting groove; 70. Moving block; 71. Scraper; 72. Drainage trough; 73. Diversion plate; 74. Fixing plate; 75. Sludge collection box; 76. Drainage hole; 87. Filter wall; 88. Sand and gravel filter layer; 89. Sand-free concrete filter layer. Detailed Implementation

[0031] The embodiments of this utility model will be described in further 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 this utility model.

[0032] Example 1: As shown in the attached document Figure 1 To be continued Figure 10 As shown: This utility model provides a wastewater source heat pump water intake and filtration system, including a pool body 10, a wastewater inlet 20 and a heat pump outlet 30 connected to opposite sides of the top of the pool body 10, and a wastewater outlet 40 and a clean water outlet 50 connected to opposite sides of the bottom of the pool body 10 and respectively arranged vertically opposite to the wastewater inlet 20 and the heat pump outlet 30.

[0033] A primary filter element 70 is provided on the upper side of the sewage inlet 20. The primary filter element 70 includes a filter box 71 disposed on the upper side of the sewage inlet 20, a filter screen plate 72 disposed inside the filter box 71, a mounting plate 73 disposed inside the filter box 71, a turntable 731 rotatably disposed on one side of the mounting plate 73, a swing plate 732 rotatably disposed on one side of the turntable 731, a through groove 733 opened on one side of the swing plate 732, a limiting strip 734 disposed on one side of the turntable 731, a limiting groove 735 disposed on one side of the mounting plate 73, and a sliding strip disposed on the limiting groove 73. The movable block 74 is connected to one end of the swing plate 732. The filter screen 72 facilitates the initial filtration of large impurities in the sewage. At the same time, the turntable 731 is connected to the drive device at the other end. The drive device drives the turntable 731 to rotate. The swing plate 732, through groove 733, limit bar 734, limit groove 735 and movable block 74 can drive the swing plate 732 to swing back and forth when the turntable rotates, thereby driving the movable block 74 to slide back and forth in the limit groove 735.

[0034] A connecting plate is provided at one end of the movable block 74, and a scraper 75 is provided at the lower end of the connecting plate. The scraper 75 contacts the filter screen plate 72. The cross-section of the scraper 75 is triangular. The scraper 75 is used to clean the impurities on the upper surface of the filter screen plate 72. When the movable block 74 slides back and forth, it drives the scraper 75 to move back and forth on the filter screen plate 72, scraping and cleaning the large impurities accumulated on the upper surface of the filter screen plate 72, reducing the possibility of them accumulating on the filter screen plate 72 and causing the filter screen plate 72 to become clogged.

[0035] A water-retaining wall 60 is horizontally provided in the middle of the pool body 10, with its two ends facing each water outlet respectively. The top of the water-retaining wall 60 is provided with a first valve 25 and a second valve 35 respectively, corresponding to the positions of the sewage inlet 20 and the heat pump outlet 30. The bottom of the water-retaining wall 60 is provided with a third valve 45 and a fourth valve 55 respectively, corresponding to the positions of the sewage outlet 40 and the clean water outlet 50.

[0036] Furthermore, the filter screen plate 72 is provided with a drain trough 76 on both sides, a flow guide plate 77 is provided on the lower side of the filter screen plate 72, a fixing plate 78 is fixedly connected to the inner walls of both sides of the filter box 71, and a sludge collection box 79 is slidably provided on the upper side of the fixing plate 78. The sludge collection box 79 has several evenly distributed drainage holes 791 on its peripheral side. Through the drain trough 76, large pieces of impurities accumulated on the top of the filter screen plate 72 can be scraped and cleaned into the sludge collection box 79 during the scraping process of the scraper 75 for collection and centralized treatment. At the same time, the drainage holes 791 on the peripheral side of the sludge collection box 79 can facilitate the filtration and discharge of water.

[0037] As can be seen from the above, during use, wastewater first enters the filter box 71. The filter screen 72 facilitates the initial filtration of large impurities in the wastewater. Simultaneously, a turntable 731 is installed, with its other end connected to a drive device. The drive device rotates the turntable 731. The swing plate 732, through groove 733, limiting strip 734, limiting groove 735, and moving block 74, when the turntable rotates, drive the swing plate 732 to swing back and forth, thereby driving the moving block 74 to move in the limiting groove 735. 5. The moving block 74 slides back and forth, driving the scraper 75 to move back and forth on the filter screen plate 72. This scrapes and cleans the large impurities accumulated on the upper surface of the filter screen plate 72, and collects them into the sludge collection box 79 for centralized treatment. At the same time, the drain hole 791 on the side of the sludge collection box 79 facilitates the filtration and discharge of wastewater. After use, open the door of the filter box 71, pull out the sludge collection box 79, and clean the sludge collection box 79.

[0038] Example 2: Based on Example 1, the wastewater source heat pump water intake filtration system includes a pool body 10, a wastewater inlet 20 connected to a heat pump outlet 30 located on opposite sides of the top of the pool body 10, and a wastewater outlet 40 connected to a clean water outlet 50 located on opposite sides of the bottom of the pool body 10 and respectively positioned vertically opposite to the wastewater inlet 20 and the heat pump outlet 30.

[0039] In this embodiment, the pool body 10 is a long rectangular cuboid, which includes a first side surface 11 and a second side surface 12 arranged at intervals, and a first end surface 13 and a second end surface 15 respectively connected between the two ends of the first side surface 11 and the second side surface 12. The first side surface 11 and the second side surface 12 are parallel and of equal length, and the first end surface 13 and the second end surface 15 are parallel and of equal length. The length of the first side surface 11 and the second side surface 12 is greater than the length of the first end surface 13 and the second end surface 15. In specific implementation, the shape of the pool body 10 is not limited to the case of this embodiment. It can also be a cube or other symmetrically arranged shapes.

[0040] A water-retaining wall 60 is horizontally arranged in the middle of the pool body 10. The two ends of the water-retaining wall 60 are opposite to the water inlets 20, 30, 40, and 50, respectively. In this embodiment, the end faces of the water-retaining wall 60 are flush with the two sides of the pool body 10, and the bottom end of the water-retaining wall 60 is located at the bottom end of the pool body 10. A first valve 25 and a second valve 35 are respectively provided at the top of the water-retaining wall 60 corresponding to the positions of the sewage inlet 20 and the heat pump outlet 30. A third valve 45 and a fourth valve 55 are respectively provided at the bottom of the water-retaining wall 60 corresponding to the positions of the sewage outlet 40 and the clean water outlet 50. A heat insulation layer 61 extending longitudinally is provided in the middle of the water-retaining wall 60.

[0041] The pool body 10 is provided with a filter wall 80 on each side of the water-retaining wall 60. The two filter walls 80 extend outward from the middle of the two sides of the water-retaining wall 60 to the end of the pool body 10. The filter wall 80 includes a sand and gravel filter layer 81 located in the middle and two sand-free concrete filter layers 82 located on both sides of the sand and gravel filter layer 81.

[0042] Two filter walls 80 and a water-retaining wall 60 divide the pool body 10 into four areas: a first water area 16, a second water area 17, a third water area 18, and a fourth water area 19. The first water area 16 and the second water area 17 are located on one side of the wastewater inlet 20 and wastewater outlet 40 of the filter wall 80, while the third water area 18 and the fourth water area 19 are located on one side of the heat pump outlet 30 and clean water outlet 50 of the filter wall 80. The first water area 16 and the third water area 18 are located on the same side of the water-retaining wall 60, as are the second water area 17 and the fourth water area 19. A first valve 25 controls the connection and disconnection of the wastewater inlet 20 with both the first water area 16 and the second water area 17, and the wastewater inlet 20 is not connected to both areas simultaneously. The second valve 35 controls the connection and disconnection of the heat pump outlet 30 with the third water zone 18 and the fourth water zone 19, respectively, and the heat pump outlet 30 is not connected to the third water zone 18 and the fourth water zone 19 simultaneously. The third valve 45 controls the connection and disconnection of the sewage outlet 40 with the first water zone 16 and the second water zone 17, respectively, and the sewage outlet 40 is not connected to the first water zone 16 and the second water zone 17 simultaneously. The fourth valve 55 controls the connection and disconnection of the clean water outlet 50 with the third water zone 18 and the fourth water zone 19, respectively, and the clean water outlet 50 is not connected to the third water zone 18 and the fourth water zone 19 simultaneously. When the sewage inlet 20 is connected to the second water zone 17, the heat pump outlet 30 is connected to the third water zone 18, the sewage outlet 40 is connected to the first water zone 16, and the clean water outlet 50 is connected to the fourth water zone 19; when the sewage inlet 20 is connected to the first water zone 16, the heat pump outlet 30 is connected to the fourth water zone 19; the sewage outlet 40 is connected to the second water zone 17, and the clean water outlet 50 is connected to the third water zone 18; when the sewage inlet 20 is connected to the first water zone 16, the heat pump outlet is connected to the fourth water zone 19, the sewage outlet 40 is connected to the second water zone 17, and the clean water outlet 50 is connected to the third water zone 18.

[0043] In use, after the raw sewage undergoes preliminary filtration through the filter box 71, the first valve 25 is positioned on the channel connecting the sewage inlet 20 and the first water zone 16, connecting the sewage inlet 20 to the second water zone 17; the second valve 35 is positioned on the channel connecting the heat pump outlet 30 and the fourth water zone 19, connecting the heat pump outlet 30 to the third water zone 18; the third valve 45 is positioned on the channel connecting the sewage outlet 40 and the second water zone 17, connecting the sewage outlet zone to the first water zone 16; the fourth valve 55 is positioned on the channel connecting the clean water outlet 50 and the third water zone 18, connecting the clean water outlet 50 to the fourth water zone 19. At this time, the first water zone 16 is the restoration zone, the second water zone 17 is the raw water zone, the third water zone 18 is the outlet zone, and the fourth water zone 19 is the clean water zone. External sewage is introduced through sewage inlet 20 and enters the second water zone 17, i.e., the raw water zone. After being filtered by filter wall 80, the clean water enters the fourth water zone 19, i.e., the clean water zone, and then flows out through the clean water outlet to exchange heat with the external heat pump. The cooled water after heat exchange with the heat pump is introduced into the third water zone 18, i.e., the return water zone, through heat pump outlet 30. After being filtered by filter wall 80, it enters the first water zone 16, i.e., the reduction zone, and finally is discharged through sewage outlet 40. This process supplies clean water to the heat pump, prevents dirt from clogging the heat pump, and utilizes the sewage as a heat source. The pump's water intake filtration system has a simple structure, employing natural infiltration and multi-stage, multi-layer filter surfaces to improve wastewater utilization efficiency. It eliminates the need for anti-blocking machines and wastewater separators, saving costs. When the sludge accumulates to a certain level in the second water zone 17, the valve settings are adjusted. Specifically, the first valve 25 is positioned on the channel connecting the wastewater inlet 20 and the second water zone 17, connecting the wastewater inlet 20 to the first water zone 16; the second valve 35 is positioned on the channel connecting the heat pump outlet 30 and the third water zone 18, allowing the heat pump outlet to... Water inlet 30 is connected to the fourth water zone 19; when the third valve 45 is positioned on the channel connecting the sewage outlet 40 and the first water zone 16, the sewage outlet zone is connected to the second water zone 17; when the fourth valve 55 is positioned on the channel connecting the clear water outlet 50 and the fourth water zone 19, the clear water outlet 50 is connected to the third water zone 18. At this time, the first water zone 16 is the raw water zone, the second water zone 17 is the restoration zone, the third water zone 18 is the clear water zone, and the fourth water zone 19 is the discharge zone. External sewage is introduced through the sewage inlet 20 and enters the... In the first water zone 16, i.e. the raw water zone, the clean water filtered by the filter wall 80 enters the third water zone 18, i.e. the clean water zone, and then flows out through the clean water outlet to exchange heat with the external heat pump. The cold water after heat exchange with the heat pump is introduced into the fourth water zone 19, i.e. the return water zone, through the heat pump return water outlet 30, and then enters the second water zone 17, i.e. the reduction zone, after being filtered by the filter wall 80. Finally, it is discharged through the sewage return water outlet 40. This can both remove the dirt in the second water zone 17 and play a backwashing role, and meet the water intake and heat exchange needs of the heat pump.

[0044] The embodiments of this utility model are given for the purpose of illustration and description. Although embodiments of this utility model have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the utility model. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this utility model.

[0045] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified.

[0046] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0047] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0049] The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0050] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A water intake filtration system for a sewage source heat pump, characterized by: The sewage inlet (20) and the heat pump outlet (30) are arranged on opposite sides of the top end of the pool body (10), and the sewage outlet (40) and the clean water outlet (50) are arranged on opposite sides of the bottom end of the pool body (10) and are arranged opposite to the sewage inlet (20) and the heat pump outlet (30) respectively; The upper side of the sewage inlet (20) is provided with a primary filter (70), and the primary filter (70) comprises a filter box (71) arranged on the upper side of the sewage inlet (20), a filter screen plate (72) arranged on the inner side of the filter box (71), a mounting plate (73) arranged on the inner side of the filter box (71), a rotating disc (731) rotatably arranged on one side of the mounting plate (73), a swing plate (732) rotatably arranged on one side of the rotating disc (731), a through groove (733) arranged on one side of the swing plate (732), a limiting strip (734) arranged on one side of the rotating disc (731), a limiting groove (735) arranged on one side of the mounting plate (73), and a moving block (74) slidably arranged in the limiting groove (735), one end of the swing plate (732) is connected with the moving block (74); One end of the moving block (74) is provided with a connecting plate, and the lower end of the connecting plate is provided with a scraper (75), and the scraper (75) is in contact with the filter screen plate (72); The pool body (10) is provided with a water retaining wall (60) arranged at the middle portion and opposite to each water inlet, the top end of the water retaining wall (60) is provided with a first valve (25) and a second valve (35) corresponding to the positions of the sewage inlet (20) and the heat pump outlet (30) respectively, and the bottom end of the water retaining wall (60) is provided with a third valve (45) and a fourth valve (55) corresponding to the positions of the sewage outlet (40) and the clean water outlet (50) respectively.

2. The intake filtration system for a sewage source heat pump of claim 1, wherein: The two sides of the filter screen plate (72) are also provided with a sewage discharge groove (76), the lower side of the filter screen plate (72) is provided with a drainage plate (77), the two inner walls of the filter box (71) are fixedly connected with a fixed plate (78), and the upper side of the fixed plate (78) is slidably provided with a sewage collecting box (79), and a plurality of evenly distributed drainage holes (791) are arranged on the circumferential surface of the sewage collecting box (79).

3. The intake filtration system for a sewage source heat pump of claim 1, wherein: The pool body (10) is provided with a filter wall (80) extending along the longitudinal direction of the pool body (10) on the two sides of the water retaining wall (60), the two filter walls (80) and the water retaining wall (60) divide the pool body (10) into a first water area (16), a second water area (17), a third water area (18) and a fourth water area (19), the first water area (16) and the second water area (17) are located on the side of the filter wall (80) close to the sewage inlet (20) and the sewage outlet (40), the third water area (18) and the fourth water area (19) are located on the side of the filter wall (80) close to the heat pump outlet (30) and the clean water outlet (50); the first water area (16) and the third water area (18) are located on the same side of the water retaining wall (60), the second water area (17) and the fourth water area (19) are located on the same side of the water retaining wall (60), the first valve (25) controls the on-off of the sewage inlet (20) and the first water area (16) and the second water area (17), and the sewage inlet (20) and the first water area (16) and the second water area (17) are not communicated at the same time; the second valve (35) controls the on-off of the heat pump outlet (30) and the third water area (18) and the fourth water area (19), and the heat pump outlet (30) and the third water area (18) and the fourth water area (19) are not communicated at the same time; the third valve (45) controls the on-off of the sewage outlet (40) and the first water area (16) and the second water area (17), and the sewage outlet (40) and the first water area (16) and the second water area (17) are not communicated at the same time; the fourth valve (55) controls the on-off of the clean water outlet (50) and the third water area (18) and the fourth water area (19), and the clean water outlet (50) and the third water area (18) and the fourth water area (19) are not communicated at the same time.

4. The intake filtration system for a sewage source heat pump of claim 3, wherein: When the sewage inlet (20) is communicated with the second water area (17), the first water area (16) is a reduction area, the second water area (17) is a raw water area, the third water area (18) is a discharge area, and the fourth water area (19) is a clean water area; when the sewage inlet (20) is communicated with the first water area (16), the first water area (16) is a raw water area, the second water area (17) is a reduction area, the third water area (18) is a clean water area, and the fourth water area (19) is a discharge area.

5. The intake filtration system for a sewage source heat pump of claim 4, wherein: The middle part of the water retaining wall (60) is provided with a heat insulation layer (61) extending along the longitudinal direction thereof.

6. The intake filtration system for a sewage source heat pump of claim 5, wherein: The filter wall (80) comprises a sand filter layer (81) in the middle part and two no-sand concrete filter layers (82) on the two sides of the sand filter layer (81).

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