A test water tank with a circulation structure

Abstract

The utility model provides a kind of test water tank with circulation structure, it relates to a test water tank technical field.The utility model includes base and water tank body, circulation structure includes backwater tank, circulation filter structure, circulation temperature rising structure and backwater filter structure, circulation filter structure includes first circulation filter structure and second circulation filter structure, circulation temperature rising structure includes first circulation temperature rising structure and second circulation temperature rising structure, backwater filter structure includes first backwater filter structure and second backwater filter structure.The utility model can effectively promote internal water circulation, realize water temperature uniform distribution, reduce impurity precipitation, and can simulate dynamic water flow environment, improve the accuracy and efficiency of test.

Description

Technical Field

[0001] This utility model relates to the field of test water tank technology, and in particular to a test water tank with a circulation structure. Background Technology

[0002] In the electronics manufacturing industry, waterproof products need to be tested for their waterproof performance before leaving the factory to verify whether they meet the standards. If they do not meet the standards, they need to be discarded. The traditional testing method is to simply leave the product in water for a period of time, and then take it out to test its performance, thereby judging the quality of the product's waterproof performance.

[0003] In existing technologies, testing of general wastewater treatment equipment generally requires filling the equipment with a large amount of water before it can be tested to determine whether the equipment meets the installation requirements. During the testing period, a large number of pipelines need to be connected, which wastes manpower and resources. At the same time, traditional water tanks also have problems such as the sedimentation of impurities in the test liquid and the stagnant water flow. Impurities generated during long-term stagnant storage or testing (such as particles detached from the sample, scale, etc.) are prone to settle at the bottom of the water tank, which may interfere with the test or contaminate the sample. Furthermore, traditional static water tanks cannot meet the requirements for tests that need to simulate dynamic water environments (such as water flow impact and circulation scouring). Utility Model Content

[0004] To address the shortcomings mentioned above, this invention provides a test water tank with a circulation structure, which effectively promotes internal water circulation, achieves uniform water temperature distribution, reduces impurity sedimentation, and can simulate a dynamic water flow environment, thereby improving the accuracy and efficiency of testing.

[0005] To address the aforementioned problems, this utility model provides a test water tank with a circulation structure, comprising a base and a tank body. The tank body is disposed on the upper end of the base, and a circulation structure is provided on the tank body. The circulation structure includes a return water tank, a circulation filtration structure, a circulation heating structure, and a return water filtration structure. The return water tank is located at the center of the base, and its top end is connected to the bottom end of the tank body. The circulation filtration structure includes a first circulation filtration structure and a second circulation filtration structure. The circulation heating structure includes a first circulation heating structure and a second circulation heating structure. The return water filtration structure includes a first return water filtration structure. The first circulation filter structure is located at the left end of the base, and its right end is connected to the left end of the return water tank. The second circulation filter structure is located at the right end of the base, and its left end is connected to the right end of the return water tank. The top of the first circulation filter structure is connected to the top of the first return water filter structure through the first circulation heating structure. The top of the second circulation filter structure is connected to the top of the second return water filter structure through the second circulation heating structure. The right end of the first return water filter structure is connected to the left end of the water tank body, and the left end of the second return water filter structure is connected to the right end of the water tank body.

[0006] Preferably, the first circulating filter structure includes a first circulating filter box and a first circulating filter structure. The first circulating filter box is located at the left end of the base and the first circulating filter structure is provided inside the first circulating filter box. The first circulating filter structure includes a first left circulating filter structure, a first middle circulating filter structure and a first right circulating filter structure, which are arranged in a parallel structure.

[0007] Preferably, the second circulating filter structure includes a second circulating filter box and a second circulating filter structure. The second circulating filter box is located at the right end of the base and contains the second circulating filter structure. The second circulating filter structure includes a second left circulating filter structure, a second middle circulating filter structure, and a second right circulating filter structure. The second left circulating filter structure, the second middle circulating filter structure, and the second right circulating filter structure are arranged in a parallel configuration.

[0008] Preferably, the first circulating heating structure includes a first circulating water tank and a first heating structure. The first heating structure includes a first electric heater and a first heat-conducting plate. The bottom end of the first circulating water tank is connected to the top end of the first circulating filter box. A first mounting bracket is provided at the front end of the first circulating water tank. A first electric heater is provided at the right end of the first mounting bracket and a first heat-conducting plate is provided at the left end of the first mounting bracket. The first electric heater is connected to the first heat-conducting plate.

[0009] Preferably, the second circulating heating structure includes a second circulating water tank and a second heating structure. The second heating structure includes a second electric heater and a second heat-conducting plate. The bottom end of the second circulating water tank is connected to the top end of the second circulating filter box. A second mounting bracket is provided at the front end of the second circulating water tank. A second electric heater is provided at the left end of the second mounting bracket and a second heat-conducting plate is provided at the right end of the second mounting bracket. The second electric heater is connected to the second heat-conducting plate.

[0010] Preferably, the first return water filtration structure includes a first return water filtration box and a first outlet water filtration box. The first return water filtration box is disposed on the left side wall of the water tank body and the first outlet water filtration box is disposed inside the first return water filtration box. The left side of the first outlet water filtration box is connected to the interior of the first return water filtration box through the inlet of the first outlet water filtration box, and the right end of the first outlet water filtration box is connected to the left end of the water tank body through the connecting port.

[0011] Preferably, the second return water filtration structure includes a second return water filtration box and a second outlet water filtration box. The second return water filtration box is disposed on the right side wall of the water tank body and the second outlet water filtration box is disposed inside the second return water filtration box. The right side of the second outlet water filtration box is connected to the interior of the second return water filtration box through the inlet of the second outlet water filtration box, and the left end of the second outlet water filtration box is connected to the right end of the water tank body through the connecting port.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. This utility model can effectively promote internal water circulation, achieve uniform water temperature distribution, reduce impurity sedimentation, and simulate dynamic water flow environment, thereby improving the accuracy and efficiency of testing.

[0014] 2. This utility model uses a water pump to force the liquid to circulate between the inlet pipe, water tank, return water tank, circulating filter box, circulating storage tank, return water filter box, circulating pipe, and outlet filter box. This can quickly mix the liquid in different areas of the water tank, significantly reduce the water temperature gradient, ensure a highly uniform temperature throughout the entire test area, and improve the reliability of the test results.

[0015] 3. The continuous water circulation of this utility model can effectively prevent impurities from settling at the bottom of the water tank, and can draw the sediment into the circulating filter box for removal through the filter structure, keeping the test liquid clean and reducing contamination and interference to the sample. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an embodiment of the present invention. Detailed Implementation

[0017] To make the objectives, technical solutions and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and examples, but the examples given are not intended to limit the present utility model.

[0018] like Figure 1 As shown, an embodiment of this utility model includes a base 1 and a water tank body. The water tank body is disposed on the upper end of the base 1 and includes a first water tank 2, a second water tank 3, and a third water tank 4 arranged in parallel. A support frame 5 is disposed on the base 1. The first water tank 2 is disposed on the upper side of the support frame 5, the second water tank 3 is disposed in the middle of the support frame 5, and the third water tank 4 is disposed on the lower side of the support frame 5. Furthermore, the bottom end of the first water tank 2 is connected to the top end of the second water tank 3 through a first connecting pipe, and the bottom end of the second water tank 3 is connected to the top end of the third water tank 4 through a second connecting pipe.

[0019] In this embodiment, a circulation structure is provided on the water tank body. The circulation structure includes a return water tank, a circulation filter structure, a circulation heating structure, and a return water filter structure. The return water tank 6, the circulation filter structure, the circulation heating structure, and the return water filter structure are all located at the left end of the water tank body. Furthermore, the return water tank 6 is located at the center of the base 1. The top of the return water tank 6 is connected to the bottom of the third water tank 4 through a pipe. The side end of the return water filter structure is connected to the side end of the first water tank 2.

[0020] In this embodiment, the circulating filter structure includes a first circulating filter structure and a second circulating filter structure. The first circulating filter structure is located at the left end of the base 1 and its right end is connected to the left end of the return water tank 6. The second circulating filter structure is located at the right end of the base 1 and its left end is connected to the right end of the return water tank 6.

[0021] In this embodiment, the first circulating filter structure includes a first circulating filter box and a first circulating filter structure. The first circulating filter box is located at the left end of the base 1 and the first circulating filter structure is provided inside the first circulating filter box. The first circulating filter structure includes a first left circulating filter structure, a first middle circulating filter structure and a first right circulating filter structure. The first left circulating filter structure, the first middle circulating filter structure and the first right circulating filter structure are arranged in a parallel structure.

[0022] In this embodiment, the first left circulation filtration structure includes a first left filter box 7 and a first left filter screen 10, the first middle circulation filtration structure includes a first middle filter box 8 and a first middle filter screen 11, and the first right circulation filtration structure includes a first right filter box 9 and a first right filter screen 12. The first left filter box 7 is located at the left end of the first circulation filter box, and the right end of the first left filter box 7 is connected to the interior of the first middle filter box 8 through the first left filter screen 10. The first middle filter box 8 is connected to the interior of the first right filter box 9 through the first middle filter screen 11. The right end of the first right filter box 9 is connected to the interior of the first connecting box 13 through the first right filter screen 12. The right end of the first connecting box 10 is connected to the interior of the return water tank 6 through a pipe.

[0023] In this embodiment, the mesh diameter of the first left filter 10 is smaller than that of the first middle filter 11, and the mesh diameter of the first middle filter 11 is smaller than that of the first right filter 12.

[0024] In this embodiment, the second circulation filter structure includes a second circulation filter box and a second circulation filter structure. The second circulation filter box is located at the right end of the base 1 and the second circulation filter structure is provided inside the second circulation filter box. The second circulation filter structure includes a second left circulation filter structure, a second middle circulation filter structure and a second right circulation filter structure. The second left circulation filter structure, the second middle circulation filter structure and the second right circulation filter structure are arranged in a parallel structure.

[0025] In this embodiment, the second left circulation filter structure includes a second left filter box 14 and a second left filter screen 18; the second middle circulation filter structure includes a second middle filter box 15 and a second middle filter screen 19; and the second right circulation filter structure includes a second right filter box 16 and a second right filter screen 20. The second right filter box 16 is located at the right end of the second circulation filter box, and the left end of the second right filter box 16 is connected to the interior of the second middle filter box 15 through the second right filter screen 20. The second middle filter box 15 is connected to the interior of the second left filter box 14 through the second middle filter screen 19. The left end of the second left filter box 14 is connected to the interior of the second connecting box 17 through the second left filter screen 18. The left end of the second connecting box 17 is connected to the interior of the return water tank 6 through a pipe.

[0026] In this embodiment, the mesh diameter of the second left filter 18 is larger than that of the second middle filter 19, and the mesh diameter of the second middle filter 19 is larger than that of the second right filter 20.

[0027] In this embodiment, the top end of the first circulating filter structure is connected to the top end of the first return water filter structure through the first circulating heating structure, the top end of the second circulating filter structure is connected to the top end of the second return water filter structure through the second circulating heating structure, the right end of the first return water filter structure is connected to the left end of the first water tank 2, and the left end of the second return water filter structure is connected to the right end of the first water tank 2.

[0028] In this embodiment, the cyclic heating structure includes a first cyclic heating structure and a second cyclic heating structure. The first cyclic heating structure is located at the left end of the support frame 5, and the second cyclic heating structure is located at the right end of the support frame 5.

[0029] In this embodiment, the first circulating heating structure includes a first circulating water tank 21 and a first heating structure. The first heating structure includes a first electric heater 22 and a first heat-conducting plate 23. The bottom end of the first circulating water tank 21 is connected to the top end of the first left filter box 7. A first mounting bracket 24 is provided on the front side wall of the first circulating water tank 21. The first electric heater 22 is provided on the right end of the first mounting bracket 24 and the first heat-conducting plate 23 is provided on the left end of the first mounting bracket 24. The first electric heater 22 is connected to the front side wall of the first circulating water tank 21 through the first heat-conducting plate 23.

[0030] In this embodiment, the second circulating heating structure includes a second circulating water tank 25 and a second heating structure. The second heating structure includes a second electric heater 26 and a second heat-conducting plate 27. The bottom end of the second circulating water tank 25 is connected to the top end of the second right filter box 17. A second mounting bracket 28 is provided on the front side wall of the second circulating water tank 25. The second electric heater 26 is provided on the left end of the second mounting bracket 28 and the second heat-conducting plate 27 is provided on the right end of the second mounting bracket 28. The second electric heater 26 is connected to the front side wall of the second circulating water tank 25 through the second heat-conducting plate 27.

[0031] In this embodiment, the return water filtration structure includes a first return water filtration structure and a second return water filtration structure. A first mounting plate 29 is provided at the left end of the support frame 5 and the first return water filtration structure is located on the upper end of the first mounting plate 29. A second mounting plate 30 is provided at the right end of the support frame 5 and the second return water filtration structure is located on the upper end of the second mounting plate 30.

[0032] In this embodiment, the first return water filtration structure includes a first return water filtration box 31 and a first outlet water filtration box 32. The first return water filtration box 31 is mounted on the first mounting plate 29, and its top end is connected to the left end of the first circulating water storage tank 21 through a first circulation pipeline structure. The upper end of the first return water filtration box 32 is provided with a first inlet pipe 33 and a first inlet guide plate. The top end of the first inlet pipe 33 is connected to the first circulation pipeline structure, and the first inlet guide plate includes a first upper inlet guide plate 34 and a first lower inlet guide plate 35. The first upper inlet guide plate 34 is located at the upper end of the first return water filtration box 31, and the first lower inlet guide plate 35 is located at the bottom end of the first return water filtration box 31. The first outlet water filtration box 32 is provided with... The first water return filter is placed inside the first return water filter box 31. The first water return filter box 31 has a first water outlet filter box inlet on its left side. The first water outlet filter box inlet includes a first upper water outlet filter box inlet 36 and a first lower water outlet filter box inlet 37. The first upper water inlet guide plate 34 is correspondingly set with the first upper water outlet filter box inlet 36, and the first lower water inlet guide plate 35 is correspondingly set with the first lower water outlet filter box inlet 37. The upper left side of the first water outlet filter box 32 is connected to the inside of the first return water filter box 31 through the first upper water outlet filter box inlet 36, and the lower left side of the first water outlet filter box 32 is connected to the inside of the first return water filter box 31 through the first lower water outlet filter box inlet 37. The right end of the first water outlet filter box 32 is connected to the left end of the first water tank 2 through a connecting port.

[0033] In this embodiment, the first circulation pipeline structure includes a first circulation inlet tank 38, a first circulation pipeline 39, a first circulation tank 40, and a first circulation outlet tank 41. The first circulation inlet tank 38 is located at the left end of the first circulation storage tank 21, and the right end of the first circulation inlet tank 38 is connected to the interior of the first circulation storage tank 21. The top end of the first circulation inlet tank 38 is connected to the left end of the first circulation outlet tank 41 through the first circulation pipeline 39. The left end of the first mounting plate 29 is provided with the first circulation tank 40, and the first circulation tank 40 is located on the first circulation pipeline 39. A first circulation water pump is provided inside the first circulation tank 40. At the same time, the bottom end of the first circulation tank 40 is connected to the top end of the first inlet pipeline 33.

[0034] In this embodiment, the second return water filtration structure includes a second return water filter box 42 and a second outlet water filter box 43. The second return water filter box 42 is mounted on the second mounting plate 30, and its top end is connected to the right end of the second circulating water storage tank 25 via a second circulation pipeline structure. A second inlet pipe 44 and a second inlet guide plate are provided at the upper end of the second return water filter box 42. The top end of the second inlet pipe 44 is connected to the second circulation pipeline structure. The second inlet guide plate includes a second upper inlet guide plate 45 and a second lower inlet guide plate 46. The second upper inlet guide plate 45 is located at the upper end of the second return water filter box 42, and the second lower inlet guide plate 46 is located at the bottom end of the second return water filter box 42. The second outlet water filter box 43 is provided with… The second water return filter box 42 is placed inside the second water return filter box 42. The first water outlet filter box inlet is provided on the right side of the second water return filter box 42. The second water outlet filter box inlet includes a second upper water outlet filter box inlet 47 and a second lower water outlet filter box inlet 48. The second upper water inlet guide plate 45 is correspondingly arranged with the second upper water outlet filter box inlet 47, and the second lower water inlet guide plate 46 is correspondingly arranged with the second lower water outlet filter box inlet 48. The upper right side of the second water outlet filter box 43 is connected to the interior of the second water return filter box 42 through the second upper water outlet filter box inlet 47. The lower right side of the second water outlet filter box 43 is connected to the interior of the second water return filter box 42 through the second lower water outlet filter box inlet 48. The left end of the second water outlet filter box 43 is connected to the right end of the first water tank 2 through a connecting port.

[0035] In this embodiment, the second circulation pipeline structure includes a second circulation inlet tank 49, a second circulation pipeline 50, a second circulation water tank 51, and a second circulation outlet tank 52. The second circulation inlet tank 49 is located at the right end of the second circulation storage tank 25, and the left end of the second circulation inlet tank 49 is connected to the interior of the second circulation storage tank 25. The top end of the second circulation inlet tank 49 is connected to the right end of the second circulation outlet tank 52 through the second circulation pipeline 50. The right end of the second mounting plate 30 is provided with the second circulation water tank 51, and the second circulation water tank 51 is located on the second circulation pipeline 50. A second circulation water pump is provided inside the second circulation water tank 51. At the same time, the bottom end of the second circulation water tank 51 is connected to the top end of the second inlet pipeline 44.

[0036] In this embodiment, the first water tank 2 is provided with a first installation port and a first sealing cover is provided on the first installation port; the second water tank 3 is provided with a second installation port and a second sealing cover is provided on the second installation port; and the third water tank 4 is provided with a third installation port and a third sealing cover is provided on the third installation port.

[0037] In this embodiment, a first observation window is provided on the first water tank 2, which includes a first left observation window and a first right observation window. The first left observation window is located on the left side of the first water tank 2 and the first right observation window is located on the right side of the first water tank 2. A second observation window is provided on the second water tank 3, which includes a second left observation window and a second right observation window. The second left observation window is located on the left side of the second water tank 3 and the second right observation window is located on the right side of the second water tank 3. A third observation window is provided on the third water tank 4, which includes a third left observation window and a third right observation window. The third left observation window is located on the left side of the third water tank 4 and the third right observation window is located on the right side of the third water tank 4.

[0038] In this embodiment, the working process is as follows:

[0039] Fill the water tank with the required test liquid (such as water) to the set level (which can be monitored by an external device using a level gauge installed inside the water tank). Start the circulating water pump in the circulating water tank. The liquid enters the return water tank 6 sequentially from the bottom of the first water tank 2 chamber, the bottom of the second water tank 3 chamber, and the bottom of the third water tank 4 chamber. The liquid in the return water tank 6 is drawn into the circulation pipeline through the circulating filter boxes and the circulating storage tank on both sides, and then re-enters the first water tank 2 through the return water filter box. During the flow, the liquid passes through two filtration structures, and impurities in the liquid are filtered out through the double filtration effect. At the same time, the liquid filtered by the return water filter box enters the circulating storage tank. The liquid flowing into the circulating storage tank can be heated by the electric heater. The heated liquid flows through the circulation pipeline to the outlet filter box at the top and then flows back to the first water tank 2. The liquid in the first water tank 2 diffuses and flows in the chamber, driving the liquid circulation of the three water tank chambers, and finally flows back to the return water tank 6 at the bottom, forming a closed loop.

[0040] Those skilled in the art can connect all electrical components and their compatible power supplies in this case via wires, and should select appropriate controllers according to actual conditions to meet control requirements. The specific connection and control sequence, and the sequential operation order between each electrical component to complete the electrical connection, are well-known technologies in the field, and will not be described further regarding electrical control.

[0041] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0042] In the description of this specification, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing the technical solution of this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this patent application.

[0043] Furthermore, 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 at least one of that feature. In the description of this patent application, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this specification, unless otherwise expressly 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this specification according to the specific circumstances.

[0045] In this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of 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.

[0046] 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. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, 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.

[0047] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A test water tank with a circulation structure, comprising a base and a tank body, wherein the tank body is disposed on the upper end of the base, and the tank body is provided with a circulation structure, characterized in that, The circulation structure includes a return water tank, a circulation filtration structure, a circulation heating structure, and a return water filtration structure. The return water tank is located at the center of the base, with its top end connected to the bottom end of the water tank body. The circulation filtration structure includes a first circulation filtration structure and a second circulation filtration structure. The circulation heating structure also includes a first circulation heating structure and a second circulation heating structure. The return water filtration structure includes a first return water filtration structure and a second return water filtration structure. The first circulation filtration structure is located at the left end of the base, and its right end is connected to the left end of the return water tank. The second circulation filtration structure is located at the right end of the base, and its left end is connected to the right end of the return water tank. The top end of the first circulation filtration structure is connected to the top end of the first return water filtration structure via the first circulation heating structure. The top end of the second circulation filtration structure is connected to the top end of the second return water filtration structure via the second circulation heating structure. The right end of the first return water filtration structure is connected to the left end of the water tank body, and the left end of the second return water filtration structure is connected to the right end of the water tank body.

2. A test water tank with a circulation structure as described in claim 1, characterized in that, The first circulating filter structure includes a first circulating filter box and a first circulating filter structure. The first circulating filter box is located at the left end of the base and the first circulating filter structure is installed inside the first circulating filter box. The first circulating filter structure includes a first left circulating filter structure, a first middle circulating filter structure and a first right circulating filter structure. The first left circulating filter structure, the first middle circulating filter structure and the first right circulating filter structure are arranged in a parallel structure.

3. A test water tank with a circulation structure as described in claim 1, characterized in that, The second circulating filter structure includes a second circulating filter box and a second circulating filter structure. The second circulating filter box is located at the right end of the base and contains the second circulating filter structure. The second circulating filter structure includes a second left circulating filter structure, a second middle circulating filter structure, and a second right circulating filter structure. The second left circulating filter structure, the second middle circulating filter structure, and the second right circulating filter structure are arranged in a parallel structure.

4. A test water tank with a circulation structure as described in claim 1, characterized in that, The first circulating heating structure includes a first circulating water tank and a first heating structure. The first heating structure includes a first electric heater and a first heat-conducting plate. The bottom end of the first circulating water tank is connected to the top end of the first circulating filter box. A first mounting bracket is provided at the front end of the first circulating water tank. A first electric heater is provided at the right end of the first mounting bracket and a first heat-conducting plate is provided at the left end of the first mounting bracket. The first electric heater is connected to the first heat-conducting plate.

5. A test water tank with a circulation structure as described in claim 1, characterized in that, The second circulating heating structure includes a second circulating water tank and a second heating structure. The second heating structure includes a second electric heater and a second heat-conducting plate. The bottom end of the second circulating water tank is connected to the top end of the second circulating filter box. A second mounting bracket is provided at the front end of the second circulating water tank. A second electric heater is provided at the left end of the second mounting bracket and a second heat-conducting plate is provided at the right end of the second mounting bracket. The second electric heater is connected to the second heat-conducting plate.

6. A test water tank with a circulation structure as described in claim 1, characterized in that, The first return water filtration structure includes a first return water filtration box and a first outlet water filtration box. The first return water filtration box is located on the left side wall of the water tank body, and the first outlet water filtration box is located inside the first return water filtration box. The left side of the first outlet water filtration box is connected to the inside of the first return water filtration box through the inlet of the first outlet water filtration box, and the right end of the first outlet water filtration box is connected to the left end of the water tank body through the connecting port.

7. A test water tank with a circulation structure as described in claim 1, characterized in that, The second return water filtration structure includes a second return water filter box and a second outlet water filter box. The second return water filter box is located on the right side wall of the water tank body, and the second outlet water filter box is located inside the second return water filter box. The right side of the second outlet water filter box is connected to the interior of the second return water filter box through the inlet of the second outlet water filter box, and the left end of the second outlet water filter box is connected to the right end of the water tank body through the connecting port.

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