A gas wall-hanging stove internal waterway module reliability test system

Abstract

The application provides a gas wall-hanging stove internal water route module reliability test system, which comprises a constant-temperature water tank assembly, a feeding opening is arranged on the constant-temperature water tank assembly, and materials are added into the constant-temperature water tank assembly to simulate real water quality; a first water outlet is arranged on the constant-temperature water tank assembly, a plurality of groups of test pipelines arranged in parallel are connected to the first water outlet, and the second water outlet of each test pipeline is connected to the first backwater outlet of the constant-temperature water tank assembly; the test pipeline comprises a first electric control switch valve, a first temperature sensor, a pressure sensor, a clamp assembly, a high-temperature-resistant corrugated pipe, a flowmeter and a second electric control switch valve which are sequentially arranged on the pipeline, the first electric control switch valve is connected to the first water outlet, and the second electric control switch valve is connected to the first backwater outlet; the water route module to be tested of the gas wall-hanging stove is installed on the clamp assembly, the water route module to be tested comprises a domestic water pipeline, a heating water pipeline and a control assembly, and the control assembly controls the domestic water pipeline or the heating water pipeline to be in communication with the test pipeline.

Description

Technical Field

[0001] This invention belongs to the field of reliability testing technology for gas-fired wall-hung boilers, and particularly relates to a reliability testing system for the internal water circuit module of a gas-fired wall-hung boiler. Background Technology

[0002] The existing patent ZL201520723014.6 discloses a test bench for the circulation and pressurization function of a gas water heater. The gas water heater under test is installed in the test pipeline of the test bench. The test bench includes two main pipelines that are respectively connected to the inlet and outlet ports of the gas water heater. Multiple branch pipes are connected in parallel between the other two ends of the two main pipelines. The multiple branch pipes include a first branch pipe that is connected to the two main pipelines at both ends. The first branch pipe and the main pipeline form a first set of circulating water circuits. The first set of circulating water circuits and the connecting water pipes form a closed pipeline.

[0003] The other two ends of the two main water pipes are connected in parallel with a second branch water pipe, a third branch water pipe and a fourth branch water pipe. The main water pipe, the second branch water pipe, the third branch water pipe and the fourth branch water pipe all have multiple bends. The first branch water pipe, the second branch water pipe, the third branch water pipe and the fourth branch water pipe are all connected in parallel between the two main water pipes, and together with the main water pipes, they form multiple sets of circulating water pipes.

[0004] In addition, an electric water heater is connected to a section of one of the main pipes to heat the water in the pipes and provide hot water to the main pipes and the aforementioned branch pipes.

[0005] When testing a gas water heater, the gas water heater is connected in series in the circulating water circuit. The main pipe and each branch pipe are filled with cold or hot water, the water circuit is closed, and then the circulation function of the gas water heater is turned on. One set of circulating water pipes is opened in sequence, while the other sets of circulating water pipes are closed. After the gas water heater is working stably, the differential pressure value on the differential pressure gauge set at the outlet of the gas water heater and the water flow value on the flow meter set on the main pipe are read to test the relevant parameters of the circulating water pipes at different lengths, thereby obtaining the working conditions of the gas water heater under hot or cold water and the working conditions under different pressurization conditions.

[0006] This technical solution only tested the pressurization performance of the tested gas water heater in different lengths of pipes under hot and cold water conditions, and did not test the service life of the gas water heater. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the present invention aims to provide a reliability testing system for the internal water circuit module of a gas-fired wall-hung boiler, which can simultaneously test the performance and durability of the water flow module under test in the gas water heater in domestic water use mode, heating water use mode, and frequent switching between the two modes.

[0008] To achieve this objective, the present invention adopts the following technical solution:

[0009] This invention provides a reliability testing system for the internal water circuit module of a gas-fired wall-hung boiler, comprising:

[0010] The constant temperature water tank assembly is equipped with a feeding port for adding materials to simulate real water quality.

[0011] The constant temperature water tank assembly is provided with a first water outlet, which is connected to multiple sets of test pipelines arranged in parallel. The second water outlet of each test pipeline is connected to the first water return port of the constant temperature water tank assembly.

[0012] The test pipeline includes a first electrically controlled switch valve, a first temperature sensor, a pressure sensor, a clamp assembly, a high-temperature resistant bellows, a flow meter, and a second electrically controlled switch valve arranged sequentially on the pipeline. The first electrically controlled switch valve is connected to the first outlet, and the second electrically controlled switch valve is connected to the first return outlet.

[0013] The water circuit module to be tested of the gas wall-hung boiler is installed on the fixture assembly. The water circuit module to be tested is connected to the test pipeline. The water circuit module to be tested includes a domestic water pipeline, a heating water pipeline, and a control component. The control component controls the domestic water pipeline or the heating water pipeline to connect to the test pipeline.

[0014] Preferably, the test pipeline is also provided with a first manual switch valve and a second manual switch valve, wherein the first manual switch valve is located between the first water outlet and the first electrically controlled switch valve.

[0015] The second manual switch valve is located between the second electrically controlled switch valve and the first return water port.

[0016] Preferably, the first electrically controlled switch valve on each of the test pipelines is connected to the first outlet through a main pipeline. The main pipeline is equipped with a main electrically controlled switch valve and a main manual switch valve, and the main manual switch valve is connected to the first outlet.

[0017] Preferably, the main pipeline includes a first pipeline and a second pipeline arranged in parallel. The first pipeline is provided with a first main electrically controlled switch valve and a first main manually controlled switch valve, and the second pipeline is provided with a second main control switch valve and a second main manually controlled switch valve.

[0018] The first master manual switch valve and the second master manual switch valve are both connected to the first outlet of the constant temperature water tank assembly.

[0019] Preferably, a third manual switching valve is also provided on the test pipeline, the third manual switching valve being located between the flow meter and the second electrically controlled switching valve.

[0020] Preferably, the constant temperature water tank assembly includes:

[0021] A cold water assembly and a constant temperature water tank, wherein one end of the cold water assembly is connected to a cold water source and the other end is connected to the constant temperature water tank;

[0022] An air pressurization component is connected to the constant temperature water tank and pressurizes the water in the constant temperature water tank to a predetermined pressure;

[0023] A heating component connected to the constant temperature water tank, the heating component being used to heat the water in the constant temperature water tank.

[0024] Preferably, the constant temperature water tank is provided with a monitoring pipeline, and the monitoring pipeline is equipped with a fourth manual switch valve and a pressure sensor. The fourth manual switch valve is connected to the constant temperature water tank.

[0025] Preferably, the air pressurization assembly includes an air compressor, a first filter, a pressure regulating valve, a pressure gauge, and a fourth electrically controlled switch valve arranged in sequence, wherein the fourth electrically controlled switch valve is connected to the constant temperature water tank.

[0026] Preferably, the constant temperature water tank is equipped with an air vent valve.

[0027] Preferably, the constant temperature water tank is equipped with a second temperature sensor.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] In this invention, the constant temperature water tank assembly is equipped with a feeding port. Foreign matter is added to it to simulate scale, facilitating the testing of the wear and corrosion of the water circuit module under test during normal water use. The constant temperature water tank assembly supplies constant temperature water to multiple sets of test pipelines arranged in parallel to simulate the durability test of the water circuit module of the gas boiler under test under both domestic water and heating water supply modes. Simultaneously, the domestic water and heating water supply pipelines are automatically and frequently switched under control to test the durability under repeated switching between these modes, thereby obtaining the service life of the water circuit module under test under different operating modes.

[0030] In this invention, the domestic water pipes and heating water pipes in the water circuit module under test automatically switch working modes under the control of the control component, realizing the durability test of the water circuit module under test within the same test pipe, without the need to change the test pipe midway, ensuring continuous testing and high work efficiency. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the reliability testing system for the internal water circuit module of the gas-fired wall-hung boiler in this invention.

[0032] The components include: 1. Constant temperature water tank assembly; 10. Feed port; 11. First water outlet; 12. First water return port; 13. Cold water assembly; 131. Seventh electrically controlled switch valve; 132. Second filter; 14. Constant temperature water tank; 15. Air pressurization assembly; 16. Heating assembly; 161. Third filter; 162. Heat pump unit; 163. Eighth electrically controlled switch valve; 17. Monitoring pipeline; 18. Fourth manual switch valve; 19. Pressure sensor; 20. Air compressor; 21. First filter; 22. Pressure regulating valve; 23. Pressure gauge; 24. Fourth electrically controlled switch valve; 26. Sixth electrically controlled switch valve; 28. Second temperature sensor.

[0033] 4. Test pipeline; 41. First electrically controlled switch valve; 42. First temperature sensor; 43. Pressure sensor; 44. Fixture assembly; 45. High-temperature resistant bellows; 46. Flow meter; 47. Second electrically controlled switch valve; 49. First manual switch valve; 50. Second manual switch valve; 51. Third manual switch valve;

[0034] 7. Main pipeline; 71. First pipeline; 72. Second pipeline; 73. First main electrically controlled switch valve; 74. First main manually controlled switch valve; 75. Second main control switch valve; 76. Second main manually controlled switch valve. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0039] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0042] like Figure 1As shown, this embodiment provides a reliability testing system for the internal water circuit module of a gas-fired wall-hung boiler, including a constant temperature water tank assembly 1. The constant temperature water tank assembly 1 is provided with a feeding port 10 for adding materials to simulate real water quality. The constant temperature water tank assembly 1 is provided with a first water outlet 11, which is connected to multiple sets of test pipelines 4 arranged in parallel. The second water outlet of each test pipeline 4 is connected to the first water return port 12 of the constant temperature water tank assembly 1. The test pipeline 4 includes a first electrically controlled switch valve 41, a first temperature sensor 42, a pressure sensor 43, a clamp assembly 44, a high-temperature resistant corrugated pipe 45, a flow meter 46, and a second electrically controlled switch valve 47 arranged sequentially on the pipeline. The first electrically controlled switch valve 41 is connected to the first water outlet 11, and the second electrically controlled switch valve 47 is connected to the first water return port 12. The water circuit module to be tested of the gas wall-hung boiler is installed on the fixture assembly 44. The water circuit module to be tested includes a domestic water pipe, a heating water pipe, and a control component. The control component controls the domestic water pipe or the heating water pipe to connect to the test pipe 4.

[0043] In this embodiment, the constant temperature water tank assembly 1 is equipped with a feed port 10, into which foreign objects are added to simulate scale, facilitating the testing of the wear and corrosion of the water circuit module under test during normal water use. The constant temperature water tank assembly 1 supplies constant temperature water to multiple sets of test pipelines 4 arranged in parallel to simulate the durability test of the water circuit module of the gas wall-hung boiler under test under domestic water supply and heating water supply operation, i.e., durability test in domestic water supply mode and heating water supply mode. At the same time, the domestic water supply and heating water supply pipelines are automatically and frequently switched under the control component to test the durability under repeated switching between domestic water supply and heating water supply, thereby obtaining the service life of the water circuit module under test under different operating modes.

[0044] In this embodiment, the domestic water pipe and heating water pipe in the water circuit module under test automatically switch working modes under the control of the control component, so as to realize the durability test of the water circuit module under test in the same test pipe 4 without the need to replace the test pipe 4 in the middle, the test is continuous and the work efficiency is high.

[0045] In this embodiment, the water circuit module under test inside the gas-fired wall-hung boiler does not need to be disassembled during testing; the entire gas-fired wall-hung boiler is installed in the fixture for testing. A high-temperature resistant corrugated pipe 45 is installed on the test pipeline 4. The high-temperature resistant corrugated pipe 45 can withstand high temperatures and is flexible, therefore it can be adapted to the interfaces of the water circuit modules under test in gas-fired wall-hung boilers from different manufacturers, allowing connection to the domestic water pipes and heating water pipes within the boiler to test the water circuit under test.

[0046] Preferably, in this embodiment, four test pipes 4 are arranged in parallel, and each set of test pipes 4 can test one gas water heater. The system can test four sets of gas wall-hung boilers at the same time.

[0047] Preferably, the constant temperature water tank assembly 1 includes a cold water assembly 13, a constant temperature water tank 14, an air pressurization assembly 15, and a heating assembly 16. One end of the cold water assembly 13 is connected to a cold water source, and the other end is connected to the constant temperature water tank 14. The air pressurization assembly 15 is connected to the constant temperature water tank 14 and pressurizes the water in the constant temperature water tank 14 to a predetermined pressure. The heating assembly 16 is connected to the constant temperature water tank 14 and is used to heat the water in the constant temperature water tank 14.

[0048] The cold water assembly 13 supplies cold water or tap water to the constant temperature water tank 14. The air pressurization assembly 15 pressurizes the water in the constant temperature water tank 14 to bring the water pressure in the constant temperature water tank 14 to a predetermined pressure value to meet the water pressure requirements of the test pipeline 4.

[0049] The heating component 16 is used to heat the water in the constant temperature water tank 14 in real time to ensure that the water temperature in the constant temperature water tank 14 remains constant. When the water flow module under test is switched to the connection between the heating water supply pipeline and the test pipeline 4, hot water is supplied to the heating water supply pipeline.

[0050] Preferably, the air pressurization assembly 15 includes an air compressor 20, a first filter 21, a pressure regulating valve 22, a pressure gauge 23 and a fourth electrically controlled switch valve 24 arranged sequentially on the pipeline, wherein the fourth electrically controlled switch valve 24 is connected to the constant temperature water tank 14.

[0051] Air compressor 20 compresses air, which is filtered by first filter 21 to remove impurities. Pressure gauge 23 displays the pressure in the pipeline, regulating valve regulates the pressure in the pipeline, and fourth electrically controlled switch valve 24 controls the on / off of pressurization of the pipeline into constant temperature water tank 14.

[0052] Preferably, a sixth electrically controlled switch valve 26 and an exhaust valve are also provided on the constant temperature water tank 14. The sixth electrically controlled switch valve 26 is connected to the constant temperature water tank 14 and controls the opening and closing of the pipeline in which it is located. When the pressure in the constant temperature water tank 14 is too high, the pressure is released through the exhaust valve to ensure the safe operation of the constant temperature water tank 14.

[0053] Specifically, the fourth electrically controlled switching valve 24 and the sixth electrically controlled switching valve 26 mentioned above are both electric diaphragm valves.

[0054] Preferably, the cold water assembly 13 includes a seventh electrically controlled switch valve 131 and a second filter, the second filter being connected to the constant temperature water tank 14, and the seventh electrically controlled switch valve 131 being connected to the tap water inlet.

[0055] The seventh electrically controlled switch valve 131 controls the opening and closing of the pipeline it is located in order to control the flow of tap water into the constant temperature water tank 14.

[0056] Specifically, the seventh electrically controlled switching valve 131 is an electric diaphragm valve.

[0057] Preferably, the heating assembly 16 includes a third filter 161, a heat pump unit 162, and an eighth electrically controlled switch valve 163. The third filter 161 is connected to the outlet of the heat pump unit 162, and the eighth electrically controlled switch valve 163 is connected between the constant temperature water tank 14 and the heat pump unit 162, and is also connected to the outlet of the constant temperature water tank 14. The heat pump unit 162 is used to heat water from the constant temperature water tank 14, and the third filter 161 is used to filter the heated water and return it to the constant temperature water tank 14. The eighth electrically controlled switch valve 163 controls the on / off state of the pipeline it is connected to.

[0058] Specifically, the eighth electrically controlled switching valve 163 is an electric diaphragm valve.

[0059] Preferably, a second temperature sensor 28 is also provided on the constant temperature water tank 14 to detect the temperature of the water in the constant temperature water tank 14 in real time.

[0060] Preferably, the constant temperature water tank 14 is provided with a monitoring pipeline 17, and the monitoring pipeline 17 is equipped with a fourth manual switch valve 18 and a pressure sensor 43. The fourth manual switch valve 18 is connected to the constant temperature water tank 14. The fourth manual switch valve 18 controls the opening and closing of the monitoring pipeline 17, and the pressure sensor 43 detects the water pressure in the constant temperature water tank 14.

[0061] Preferably, the first electrically controlled switch valve 41 on each test pipeline 4 is connected to the first outlet 11 through the main pipeline 7. The main pipeline 7 is equipped with a main electrically controlled switch valve and a main manual switch valve, and the main manual switch valve is connected to the first outlet 11.

[0062] Each of the aforementioned test pipelines 4 is controlled to open or close via a main electrically controlled switch valve and a main manually controlled switch valve. In this embodiment, the main electrically controlled switch valve is an electric diaphragm valve, and the main manually controlled switch valve is a manual shut-off valve.

[0063] More preferably, the main pipeline 7 includes a first pipeline 71 and a second pipeline 72 arranged in parallel. The first pipeline 71 is equipped with a first main electrically controlled switch valve 73 and a first main manually controlled switch valve 74, and the second pipeline 72 is equipped with a second main control switch valve 75 and a second main manually controlled switch valve 76. The first main manually controlled switch valve 74 and the second main manually controlled switch valve 76 are both connected to the first outlet 11 of the constant temperature water tank assembly 1.

[0064] The first master manual switch valve 74 and the second master manual switch valve 76 are connected to the constant temperature water tank assembly 1, and the first water outlet 11 can be two. The first master manual switch valve 74 is connected to one of them, and the second master manual switch valve 76 is connected to the other.

[0065] Specifically, the first main manual switch valve 74 is a manual shut-off valve, and the second main manual switch valve 76 is a manual ball valve. The first main electric switch valve 73 and the second main electric switch valve are electric diaphragm valves.

[0066] Two of the test lines 4 are controlled by a first main electrically controlled switch valve 73 and a first main manually controlled switch valve 74. The other two test lines 4 are controlled by a second main electrically controlled switch valve and a second main manually controlled switch valve 76.

[0067] Preferably, the test pipeline 4 includes, in addition to the first electrically controlled switch valve 41, the first temperature sensor 42, the pressure sensor 43, the clamp assembly 44, the high-temperature resistant bellows 45, the flow meter 46, and the second electrically controlled switch valve 47 arranged sequentially on the pipeline, a third manual switch valve 51, which is located between the flow meter 46 and the second electrically controlled switch valve 47.

[0068] Specifically, the first electrically controlled switching valve 41 and the second electrically controlled switching valve 47 are both electric diaphragm valves. The third manually controlled switching valve 51 is a manually operated shut-off valve.

[0069] Preferably, the test pipeline 4 is further provided with a first manual switch valve 49 and a second manual switch valve 50. The first manual switch valve 49 is located between the first outlet 11 and the first electrically controlled switch valve 41. The second manual switch valve 50 is located between the second electrically controlled switch valve 47 and the first return outlet 12.

[0070] A first manual switch valve 49 and a second manual switch valve 50 are respectively installed at both ends of each test pipeline 4. After the gas wall-hung boiler is tested, the first manual switch valve 49 and the second manual switch valve 50 are opened and an external water source is connected to flush the test pipeline 4.

[0071] Specifically, both the first manual switching valve 49 and the second manual switching valve 50 are manual ball valves.

[0072] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A reliability testing system for the internal water circuit module of a gas-fired wall-hung boiler, characterized in that, include: The constant temperature water tank assembly (1) is provided with a feeding port (10) for adding materials to simulate real water quality; The constant temperature water tank assembly (1) is provided with a first water outlet (11), and the first water outlet (11) is connected to multiple sets of test pipelines (4) arranged in parallel. The second water outlet of each test pipeline (4) is connected to the first water return port (12) of the constant temperature water tank assembly (1). The test pipeline (4) includes a first electrically controlled switch valve (41), a first temperature sensor (42), a pressure sensor (43), a clamp assembly (44), a high-temperature resistant bellows (45), a flow meter (46), and a second electrically controlled switch valve (47) arranged sequentially on the pipeline. The first electrically controlled switch valve (41) is connected to the first outlet (11), and the second electrically controlled switch valve (47) is connected to the first return outlet (12). The water circuit module to be tested of the gas wall-hung boiler is installed on the fixture assembly (44). The water circuit module to be tested includes a domestic water pipe, a heating water pipe and a control component. The control component controls the domestic water pipe or the heating water pipe to connect with the test pipe (4). The test pipeline (4) is also equipped with a first manual switch valve (49) and a second manual switch valve (50), with the first manual switch valve (49) located between the first outlet (11) and the first electrically controlled switch valve (41). The second manual switch valve (50) is disposed between the second electrically controlled switch valve (47) and the first return water port (12); The first electrically controlled switch valve (41) on each of the test pipelines (4) is connected to the first outlet (11) through the main pipeline (7). The main pipeline (7) is equipped with a main electrically controlled switch valve and a main manual switch valve. The main manual switch valve is connected to the first outlet (11). The main pipeline (7) includes a first pipeline (71) and a second pipeline (72) arranged in parallel. The first pipeline (71) is provided with a first main electric control valve (73) and a first main manual control valve (74). The second pipeline (72) is provided with a second main control valve (75) and a second main manual control valve (76). The first main manual switch valve (74) and the second main manual switch valve (76) are both connected to the first outlet (11) of the constant temperature water tank assembly (1).

2. The reliability testing system for the internal water circuit module of a gas-fired wall-hung boiler according to claim 1, characterized in that, The test pipeline (4) is also equipped with a third manual switch valve (51), which is located between the flow meter (46) and the second electrically controlled switch valve (47).

3. The reliability testing system for the internal water circuit module of a gas-fired wall-hung boiler according to claim 2, characterized in that, The constant temperature water tank assembly (1) includes: The cold water assembly (13) and the constant temperature water tank (14) are connected to a cold water source at one end and to the constant temperature water tank (14) at the other end. An air pressurization assembly (15) is connected to the constant temperature water tank (14) and pressurizes the water in the constant temperature water tank (14) to a predetermined pressure; A heating component (16) is connected to the constant temperature water tank (14) and is used to heat the water in the constant temperature water tank (14).

4. The reliability testing system for the internal water circuit module of a gas-fired wall-hung boiler according to claim 3, characterized in that, The constant temperature water tank (14) is provided with a monitoring pipeline (17), and the monitoring pipeline (17) is provided with a fourth manual switch valve (18) and a pressure sensor (43). The fourth manual switch valve (18) is connected to the constant temperature water tank (14).

5. The reliability testing system for the internal water circuit module of a gas-fired wall-hung boiler according to claim 4, characterized in that, The air pressurization assembly (15) includes an air compressor (20), a first filter (21), a pressure regulating valve (22), a pressure gauge (23), and a fourth electrically controlled switch valve (24) arranged in sequence. The fourth electrically controlled switch valve (24) is connected to the constant temperature water tank (14).

6. The reliability testing system for the internal water circuit module of a gas-fired wall-hung boiler according to claim 4, characterized in that, The constant temperature water tank (14) is equipped with an exhaust valve.

7. The reliability testing system for the internal water circuit module of a gas-fired wall-hung boiler according to claim 4, characterized in that, A second temperature sensor (28) is installed on the constant temperature water tank (14).

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