A testing device and testing system for a circulating water test system

Abstract

The utility model provides a kind of testing device and test system for circulating water test system. Circulating water test system includes first water pump, and testing device includes water tank and air compressor. Water tank is pressure-bearing water tank. Water tank is connected with water supply line and backwater line, the import of first water pump is connected in the export of water supply line, and the export of first water pump is connected in the import of backwater line. Air compressor is communicated with water tank inside, and is configured to provide gas extrusion water in water tank, to at least make water supply line and first water pump fill with water when first water pump stops. Air compressor inputs air into water tank inside, to make water in water tank flow towards first water pump, offset the backflow possibly caused by water in water supply line under the action of gravity and inertia, ensure that water supply line and first water pump fill with water, prevent gas from entering pump body, ensure that first water pump can normally realize water absorption without again carrying out drainage operation when first water pump restarts.

Description

Technical Field

[0001] This utility model relates to the field of circulating water testing technology, and in particular to a testing device and testing system for circulating water testing systems. Background Technology

[0002] The testing device is primarily used to verify the proper functioning of the circulating water test system. The system contains a water pump to power the water flow. During testing, the pump is connected to the testing device via piping. Each time the test stops, water flows into the tank due to inertia and gravity, potentially creating a vacuum in the piping before and after the pump. When the system is restarted, air enters the pump, hindering water intake and preventing it from drawing water. Utility Model Content

[0003] In view of the above problems, this utility model is proposed to provide a test device and test system for a circulating water test system that overcomes or at least partially solves the above problems. It can solve the problem that water will flow into the water tank due to inertia and gravity, causing air to enter the water pump and hindering water intake, thus making the water pump unable to draw water. The present invention achieves the purpose of preventing air from entering the water pump, so that the water pump can work normally without drainage operation when restarting.

[0004] Specifically, this utility model provides a testing device for a circulating water test system, the circulating water test system including a first water pump, and the testing device including:

[0005] The water tank is a pressurized water tank. The water tank is connected to a water supply pipeline and a water return pipeline. The inlet of the first water pump is connected to the outlet of the water supply pipeline, and the outlet of the first water pump is connected to the inlet of the water return pipeline.

[0006] An air compressor, which is connected to the interior of the water tank, is configured to provide gas to compress the water in the water tank so as to fill at least the water supply line and the first water pump with water when the first water pump stops.

[0007] Optionally, the testing apparatus further includes:

[0008] The second water pump is installed on the water supply pipeline and configured to cause the water in the water tank to flow to the first water pump.

[0009] Optionally, the testing apparatus further includes:

[0010] A first check valve is installed on the water supply pipeline and on a first pipe section between the first water pump and the second water pump, configured to prevent water in the water supply pipeline from flowing from the first water pump to the water tank.

[0011] A second check valve is installed on the return water pipeline and configured to prevent water in the return water pipeline from flowing from the water tank to the first water pump.

[0012] Optionally, the testing apparatus further includes:

[0013] The third check valve is installed on the water supply pipeline and on the second pipe section between the water tank and the second water pump, and is configured to prevent water in the water supply pipeline from flowing from the second water pump to the water tank.

[0014] Optionally, both the first pipe section and the return water pipe are flexible hoses.

[0015] Optionally, the testing apparatus further includes:

[0016] The test module is connected to the water supply pipeline or the return water pipeline.

[0017] The test module includes one or more of a heat exchanger, a pressure regulating valve, and a flow regulating valve.

[0018] Optionally, the testing apparatus further includes:

[0019] A liquid detection device is installed at the inlet of the first water pump to detect the water pressure at the inlet of the first water pump, so as to detect whether there is water at the inlet of the first water pump.

[0020] The air compressor and the liquid detection device are electrically connected through a control system, so that the control system adjusts the power of the air compressor according to the water pressure value at the inlet of the first water pump detected by the liquid detection device.

[0021] This utility model also provides a testing system, including:

[0022] The aforementioned testing apparatus.

[0023] A circulating water test system includes a first water pump, which is a centrifugal pump. The inlet and outlet of the centrifugal pump are connected to the water tank via a supply water pipeline and a return water pipeline, respectively. The height of both the inlet and outlet of the centrifugal pump is higher than that of the water tank.

[0024] Optionally, the testing system further includes at least two quick-connect fittings, wherein the inlet and outlet of the first water pump are each connected to the water supply pipe or the return pipe via one of the quick-connect fittings. The quick-connect fitting includes:

[0025] A first connecting portion includes a connecting cavity, one end of which has an opening and the other end has a first water inlet. The connecting cavity contains a stop member that can move radially along the connecting cavity, and a first top post that can move axially along the connecting cavity. The first top post is configured to be subjected to a force toward the first water inlet to cause the first top post to block the first water inlet.

[0026] The second connecting portion includes a connecting post, which is inserted into the connecting cavity from the opening. A stop groove is formed on the outer periphery of the connecting post, and a stop member engages within the stop groove. The connecting post is a hollow post, and a second water inlet is provided at one end of the connecting post near the first water inlet. A second top post is provided inside the connecting post and is movable along the axial direction of the connecting post. The second top post is configured to be subjected to a force toward the second water inlet to cause the second top post to block the second water inlet. The first top post and the second top post are configured to abut against each other and move when the connecting post is inserted into the connecting cavity, so that the first water inlet and the second water inlet are connected.

[0027] In one of the quick-connect fittings, one of the first connecting portion and the second connecting portion is connected to the inlet of the first water pump, and the other is connected to the outlet of the water supply pipeline.

[0028] In another quick-connect fitting for the pipeline, one of the first connecting portion and the second connecting portion is connected to the outlet of the first water pump, and the other is connected to the inlet of the return water pipeline.

[0029] Optionally, the circulating water test system includes a first heat exchanger; the first heat exchanger includes a heat exchange inlet and a heat exchange outlet connected in series.

[0030] The outlet of the first water pump is connected to the heat exchange inlet of the first heat exchanger, and the heat exchange outlet of the first heat exchanger is connected to the inlet of the return water pipeline. Alternatively, the outlet of the supply water pipeline is connected to the heat exchange inlet of the first heat exchanger, and the heat exchange outlet of the first heat exchanger is connected to the inlet of the first water pump.

[0031] In the testing device of this invention, the water tank is connected to the circulating water test system via a water supply pipeline and a return pipeline, and the inside of the water tank is not connected to the outside atmosphere. When the first water pump is about to stop, the air compressor starts and introduces air into the water tank. The water in the tank is compressed by the air, causing the water in the tank to flow towards the first water pump. This counteracts the backflow that may be caused by gravity and inertia in the water supply pipeline, ensuring that the water supply pipeline and the first water pump are full of water. This effectively prevents gas from entering the pump body, thus ensuring that the first water pump can quickly and normally draw water without needing to perform a drainage operation when restarting.

[0032] The above and other objects, advantages and features of this utility model will become more apparent to those skilled in the art from the following detailed description of specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0033] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0034] Figure 1 This is a schematic structural diagram of a test system according to an embodiment of the present invention;

[0035] Figure 2 This is a schematic structural diagram of the water tank in a testing device according to an embodiment of the present invention;

[0036] Figure 3 This is a schematic structural diagram of a quick-connect fitting for a pipeline in a testing device according to an embodiment of the present invention;

[0037] Figure 4 This is a schematic structural diagram of a quick-connect fitting for a pipeline in a testing device according to an embodiment of the present invention.

[0038] List of reference numerals in the attached diagram:

[0039] 100. Circulating water test system; 110. First water pump;

[0040] 200. Testing device; 210. Water tank; 211. Support base; 212. Support rod; 220. Water supply pipeline; 221. First pipeline section; 222. Second pipeline section; 230. Return water pipeline; 240. First check valve; 250. Second check valve; 260. Third check valve; 270. Air compressor; 280. Second water pump;

[0041] 300. Pipe quick connector; 310. First connection part; 311. Connection cavity; 312. First water inlet; 313. Stop part; 314. First top column; 320. Second connection part; 321. Connection column; 322. Second water inlet; 323. Stop groove; 324. Second top column. Detailed Implementation

[0042] The following reference Figures 1 to 4 This invention describes a testing apparatus and testing system for a circulating water testing system according to embodiments of the present invention. In this description, it should be understood that 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. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically described, this indicates that other features are not excluded and may be further included.

[0043] Unless otherwise expressly specified and limited, the terms "set," "install," "connect," "link," "fix," and "couple" 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 should be able to understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] Furthermore, in the description of this embodiment, "above" or "below" the second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. That is, in the description of this embodiment, "above," "over," and "on top" of the second feature includes the first feature being 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," or "below" of the second feature can mean the first feature is 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.

[0045] In the description of this embodiment, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. 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.

[0046] Figure 1 This is a schematic structural diagram of a testing system according to an embodiment of the present invention, such as... Figure 1 As shown, and refer to Figures 2 to 4 This utility model provides a testing device for a circulating water test system. The circulating water test system 100 includes a first water pump 110, and the testing device 200 includes a water tank 210 and an air compressor 270.

[0047] Water tank 210 is a pressurized water tank. Water tank 210 is connected to water supply pipe 220 and water return pipe 230. The inlet of the first water pump 110 is connected to the outlet of the water supply pipe 220, and the outlet of the first water pump 110 is connected to the inlet of the water return pipe 230.

[0048] The air compressor 270 is internally connected to the water tank 210 and is configured to provide gas to compress the water in the water tank 210 so that when the first water pump 110 stops, at least the water supply line 220 and the first water pump 110 are filled with water.

[0049] The testing device 200 is connected to the circulating water test system 100 so that a circulation loop is formed between the testing device 200 and the circulating water test system 100, in order to test whether the circulating water test system 100 can work properly.

[0050] Taking the first water pump 110 as a centrifugal water pump as an example, the centrifugal water pump can only create a vacuum in the middle of the impeller when the water supply pipeline 220 and the pump body are full of water. This allows the water in the water tank 210 to flow into the pump under air pressure, and then flow into the return water pipeline 230 after being pressurized by the pump. Therefore, when the centrifugal water pump stops, if the water in the water supply pipeline 220 flows into the water tank 210 due to inertia and gravity, when it restarts, because the density of air is much less than that of water, the centrifugal force generated by air will be much less than that of water when the impeller rotates at the same speed. This will cause air to accumulate in the center of the impeller, preventing the formation of a sufficient vacuum, hindering water intake, and affecting the continuous operation of the pump. Therefore, the existing test system must purge the air from the pump body during restart to maintain normal operation, making the test operation relatively complex.

[0051] In this embodiment, the water tank 210 is a pressurized water tank, connected to the circulating water test system 100 via a water supply pipe 220 and a return water pipe 230, and the interior of the water tank 210 is not connected to the outside atmosphere. When the first water pump 110 is about to stop, the air compressor 270 starts and introduces air into the water tank 210. The water in the water tank 210 is compressed by the air, causing the water in the water tank 210 to flow towards the first water pump 110, thereby counteracting the backflow that may be caused by the water in the water supply pipe 220 under the action of gravity and inertia. This ensures that the water supply pipe 220 and the first water pump 110 are full of water, thereby effectively preventing gas from entering the pump body. This ensures that when the first water pump 110 restarts, it can quickly and normally achieve water intake without the need for drainage operations.

[0052] Of course, the air compressor 270 can not only be started when the first water pump 110 is about to stop, but can also remain in the starting state during the process of the test device 200 testing the circulating water test system 100.

[0053] In some embodiments of this utility model, the air compressor 270 inputs a certain amount of air into the water tank 210 to cause the water in the water tank 210 to move towards the first water pump 110. When the first water pump 110 is higher than the water tank 210, the gravity of the water at the inlet of the first water pump 110 and the pressure of the air in the water tank 210 are offset to prevent the water from flowing back into the water tank 210 in the water supply pipeline 220 due to gravity.

[0054] Furthermore, since the return water pipe 230 is also under pressure, it is also full of water when the first water pump 110 is not working. In other words, when the first water pump 110 is higher than the water tank 210, the outlet of the first water pump 110 is full of water.

[0055] In some embodiments of this utility model, such as Figure 2 As shown, the water tank 210 is elliptical in shape and includes a support structure. Several support structures are evenly distributed along the axial direction of the water tank 210. The support structures are arranged along the major axis of the ellipse and support and cooperate with the two ends of the major axis of the water tank 210. The support structure includes a support base 211 and a support rod 212, with the support base 211 fixed to both ends of the support rod 212. The support base 211 fits against the two ends of the major axis of the water tank 210 to distribute the stress at the two ends of the support rod 212. After the support structure is assembled inside the water tank 210, when the water tank 210 is filled with a large amount of water or gas, the water tank 210 deforms outward along its minor axis due to internal pressure. However, the two ends of the major axis of the water tank 210 are tightly fitted with the support base 211, which prevents the water tank 210 from undergoing excessive deformation and ensures the structural strength of the water tank 210.

[0056] In some embodiments of this utility model, the support base 211 is spot welded to the water tank 210 to prevent displacement of the water tank 210 during movement, transportation or installation.

[0057] In some embodiments of this utility model, such as Figure 1 As shown, the test device 200 also includes a second water pump 280, which is installed on the water supply pipeline 220 and configured to cause the water in the water tank 210 to flow to the first water pump 110.

[0058] In this embodiment, the inlet of the second water pump 280 is connected to the water tank 210. The outlet of the second water pump 280 is connected to the inlet of the first water pump 110, allowing the second water pump 280 to act as a pre-pressurization unit to further provide greater power for the flow of water in the water supply pipeline 220. Moreover, the cooperation of the two water pumps enables the total head of the test system to reach the same head as in actual use, and also expands the simulation range of the test system's head, so that the test device 200 can be adapted to more models of circulating water test systems 100.

[0059] In some embodiments of this utility model, such as Figure 1 As shown, the water tank 210 includes a tank body, which is provided with an inlet connected to an external water source, an outlet connected to the inlet of the water supply pipe 220, a return outlet connected to the outlet of the return water pipe 230, and an overflow outlet located on the top of the tank body.

[0060] In this embodiment, both the inlet and the overflow are normally closed. The inlet is only open when water needs to be supplied to the water tank 210, and the overflow is only open when water is discharged or when the water level in the water tank 210 exceeds a set value.

[0061] In some embodiments of this utility model, such as Figure 1 As shown, the testing device 200 also includes a first check valve 240 and a second check valve 250. The first check valve 240 is disposed on the water supply pipeline 220 and is located on the first pipe section 221 between the first water pump 110 and the second water pump 280, and is configured to prevent water in the water supply pipeline 220 from flowing from the first water pump 110 to the water tank 210.

[0062] The second check valve 250 is installed on the return water pipe 230 and configured to prevent water in the return water pipe 230 from flowing from the water tank 210 to the first water pump 110.

[0063] In this embodiment, the first check valve 240 and the second check valve 250 ensure that the direction of water flow in the water supply pipeline 220 and the return pipeline 230 is always in a set circulation state, avoiding backflow of water when the first water pump 110, the second water pump 280 or the air compressor 270 is not working, and further ensuring that the water supply pipeline 220 and the first water pump 110 are in a state of being full of water.

[0064] In some embodiments of this utility model, such as Figure 1 As shown, the test device 200 also includes a third check valve 260, which is disposed on the water supply pipeline 220 and on the second pipe section 222 between the water tank 210 and the second water pump 280, and is configured to prevent water in the water supply pipeline 220 from flowing from the second water pump 280 to the water tank 210.

[0065] In this embodiment, the third check valve 260 is provided to ensure that the water at the inlet of the second water pump 280 flows back into the water tank 210, so that the inlet of the second water pump 280 is filled with water, thereby preventing air from entering the second water pump 280 when it starts.

[0066] In some embodiments of this utility model, the testing device 200 further includes a testing module, which is connected to the water supply pipe 220 or the return water pipe 230.

[0067] The test module includes one or more of the following: a heat exchanger, a pressure regulating valve, and a flow regulating valve. The heat exchanger can be an evaporator or a condenser.

[0068] In this embodiment, setting a test module on the water supply pipeline 220 or the return water pipeline 230 can make the water flow in the test device 200 reach the set heat, pressure or flow rate when testing the circulating water test system 100, so as to test the accuracy of the circulating water test system 100 in detecting heat, pressure or flow rate, respectively or simultaneously.

[0069] In some embodiments of this utility model, the first pipe section 221 and the return water pipe 230 are both flexible hoses.

[0070] In this embodiment, the inlet and outlet of the second water pump 280 are both connected by hoses, which reduces the impact of vibration of the test device 200 during operation on the circulating water test system 100 and improves the accuracy of the test.

[0071] In some embodiments of this utility model, the testing device 200 further includes a liquid detection device, which is disposed at the inlet of the first water pump 110 and is used to detect the water pressure at the inlet of the first water pump 110 to detect whether there is water at the inlet of the first water pump 110.

[0072] The air compressor 270 is electrically connected to the liquid detection device through a control system, so that the control system adjusts the power of the air compressor 270 according to the water pressure value at the inlet of the first water pump 110 detected by the liquid detection device.

[0073] In this embodiment, a liquid detection device is installed at the inlet of the first water pump 110 to monitor the water pressure or liquid level at this critical point in real time and transmit the detection signal to the control system. The air compressor 270 is electrically connected to the liquid detection device through the control system, and its operating power can be dynamically adjusted according to the detected water pressure value. When the liquid detection device detects insufficient water pressure at the inlet of the first water pump 110, the control system controls the air compressor 270 to operate at higher power, rapidly filling the water tank 210 with gas, quickly increasing the internal pressure of the water tank 210, thereby forcing water into the water supply pipeline 220 until the inlet of the first water pump 110 is full. When the detected water pressure value is within the normal range, the system automatically reduces the power of the air compressor 270 or directly shuts down the air compressor 270, thereby reducing energy consumption. This test device 200, whose power can be adjusted based on actual needs, not only eliminates the risk of the first water pump 110 running dry but also avoids energy waste caused by the continuous high-power operation of the air compressor 270, achieving a balance between safety and economy.

[0074] Preferably, in some embodiments of this invention, the liquid detection device is a pressure sensor.

[0075] This utility model embodiment provides a testing system, such as Figure 1 As shown, the test device 200 and the circulating water test system 100 are included in any of the above embodiments. The circulating water test system 100 includes a first water pump 110, which is a centrifugal pump. The inlet and outlet of the centrifugal pump are connected to the water tank 210 through a water supply pipeline 220 and a return water pipeline 230, respectively.

[0076] In this embodiment, when the centrifugal pump is about to stop, the air compressor 270 introduces air into the water tank 210. The water in the water tank 210 is compressed by the air, causing the water in the water tank 210 to flow towards the centrifugal pump. This counteracts the backflow that may be caused by gravity and inertia in the water supply pipeline 220, ensuring that the water supply pipeline 220 and the centrifugal pump are full of water. This effectively prevents gas from entering the pump body, thus ensuring that the centrifugal pump can quickly and normally draw water without having to perform a drainage operation when restarting.

[0077] In some embodiments of this utility model, the height of the centrifugal pump is higher than that of the water tank 210; specifically, the heights of the inlet and outlet of the centrifugal pump are higher than those of the water tank 210. Preferably, the circulating water test system 100 is a circulating water test system 100 for an air conditioner.

[0078] In this embodiment, the air conditioner is typically located at a high position during actual installation. The circulating water test system 100 and the centrifugal pump are arranged above the water tank 210 to ensure the efficient and normal operation of the air conditioner. Moreover, the test device 200 of this invention, due to the inclusion of the air compressor 270, can counteract the backflow of water in the water supply pipeline 220 caused by gravity, making it suitable for monitoring circulating water test systems 100 such as air conditioners that need to be installed at a high position.

[0079] In some embodiments of this utility model, the testing system further includes at least two quick-connect fittings 300, with the inlet and outlet of the first water pump 110 connected to the water supply pipe 220 or the return water pipe 230 via a quick-connect fitting 300.

[0080] In this embodiment, the quick-connect fitting 300 makes it easier to disassemble the pipe connecting the testing device 200 and the experimental device, thereby improving the testing efficiency of the testing device 200.

[0081] In some embodiments of this utility model, such as Figure 3 and Figure 4 As shown, the quick-connect fitting 300 includes a first connecting part 310 and a second connecting part 320.

[0082] The first connecting part 310 includes a connecting cavity 311, one end of which has an opening and the other end has a first water inlet 312. The connecting cavity 311 contains a stop 313 that can move radially along the connecting cavity 311, and a first push post 314 that can move axially along the connecting cavity 311. The first push post 314 is configured to be subjected to a force toward the first water inlet 312, thereby causing the first push post 314 to block the first water inlet 312.

[0083] The second connecting part 320 includes a connecting post 321, which is inserted into the connecting cavity 311 from the opening. A stop groove 323 is formed on the outer periphery of the connecting post 321, and a stop member 313 is engaged in the stop groove 323. The connecting post 321 is a hollow post, and a second sprue 322 is provided at one end of the connecting post 321 near the first sprue 312. A second top post 324 is provided inside the connecting post 321 and is movable along the axial direction of the connecting post 321. The second top post 324 is configured to be subjected to a force toward the second sprue 322 to cause the second top post 324 to block the second sprue 322. The first top post 314 and the second top post 324 are configured to abut against each other and move when the connecting post 321 is inserted into the connecting cavity 311, so that the first sprue 312 and the second sprue 322 are connected.

[0084] In a quick-connect fitting 300, one of the first connecting part 310 and the second connecting part 320 is connected to the inlet of the first water pump 110, and the other is connected to the outlet of the water supply pipe 220.

[0085] In another quick-connect fitting 300, one of the first connecting part 310 and the second connecting part 320 is connected to the outlet of the first water pump 110, and the other is connected to the inlet of the return water pipe 230.

[0086] Figure 3 The working state is such that the connecting post 321 is inserted into the connecting cavity 311, so that the first water inlet 312 and the second water inlet 322 are connected.

[0087] Figure 4 This is the state where the connecting post 321 has not yet been inserted into the connecting cavity 311.

[0088] Furthermore, the first top post 314 is connected to the connecting cavity 311 by a spring or other elastic element. The second top post 324 is connected to the connecting post 321 by a spring or other elastic element. The stop member 313 is spherical, and the cross-section of the stop groove 323 is a smooth transition arc shape with the outer periphery of the connecting post 321 to facilitate the entry and exit of the stop member 313.

[0089] The first connecting portion 310 includes a connecting body forming a connecting cavity 311 and a stop cylinder. The stop cylinder is cylindrical and sleeved on the outside of the connecting body. The stop cylinder is slidable along the axis of the first connecting portion 310 and is connected to the connecting body by a spring or other elastic element to cause the stop cylinder to be located on the outer periphery of the stop member 313. When the stop cylinder slides to the outer periphery of the stop member 313, the stop member 313 is restricted from moving radially along the connecting cavity 311, and thus, when it is within the stop groove 323 at the stop member 313, the relative movement of the first connecting portion 310 and the second connecting portion 320 is restricted.

[0090] In this embodiment, the first connecting part 310 includes a connecting cavity 311, within which is a radially movable stop 313 and an axially movable first top post 314. In its natural state, the first top post 314 is blocked by the pressure of a spring or other elastic element, sealing the first water inlet 312. The second connecting part 320 includes a hollow connecting post 321, inside which is an axially movable second top post 324, which similarly blocks the second water inlet 322 in its natural state. When the connecting post 321 is inserted into the connecting cavity 311 through the opening, the first top post 314 and the second top post 324 abut against each other and retract synchronously, thereby simultaneously opening the first water inlet 312 and the second water inlet 322 to form a smooth flow channel. Simultaneously, the stop 313 engages with the stop groove 323 of the connecting post 321, completing a self-locking mechanism. If disconnection is required to replace the circulating water test system 100 under test or for maintenance, simply release the stop 313 from the stop groove 323 and then pull out the connecting post 321. The first top column 314 and the second top column 324 automatically reset under the action of elasticity and re-seal the water outlet, achieving rapid separation without leakage.

[0091] Preferably, the first connecting part 310 of one quick-connect pipe fitting 300 is connected to the water pump inlet, and the second connecting part 320 is connected to the water supply pipe outlet 220. The first connecting part 310 of the other quick-connect pipe fitting 300 is connected to the water pump outlet, and the second connecting part 320 is connected to the return water pipe inlet 230.

[0092] In some embodiments of this utility model, preferably, the circulating water test system 100 is an air conditioner circulating water test system 100. Under normal operating conditions, the air conditioner circulating water test system 100 includes: a compressor, a first heat exchanger, a second heat exchanger, and a throttling device. The circulating water test system includes a first heat exchanger and a second heat exchanger. The first heat exchanger includes a heat exchange inlet and a heat exchange outlet that are connected.

[0093] In some embodiments of this utility model, the outlet of the first water pump 110 is connected to the heat exchange inlet of the first heat exchanger, and the heat exchange outlet of the first heat exchanger is connected to the inlet of the return water pipe 230, so that the water flowing out from the first water pump 110 undergoes heat exchange when it flows through the first heat exchanger.

[0094] In some embodiments of this utility model, the outlet of the water supply pipeline 220 is connected to the heat exchange inlet of the first heat exchanger, and the heat exchange outlet of the first heat exchanger is connected to the inlet of the first water pump 110, so that the water flowing out of the water supply pipeline 220 undergoes heat exchange when it flows through the first heat exchanger.

[0095] In some embodiments of this utility model, the first heat exchanger is disposed in the indoor unit of the air conditioner, and the second heat exchanger is disposed in the outdoor unit of the air conditioner.

[0096] When the air conditioner is in cooling mode, the first heat exchanger is the evaporator, and the second heat exchanger is the condenser. The compressor compresses the refrigerant, turning it into a high-temperature, high-pressure gas. This gas flows through a four-way valve to the second heat exchanger, where it liquefies into a low-temperature, high-pressure liquid. The heat generated during liquefaction is exhausted outdoors by the fan. The low-temperature, high-pressure liquid refrigerant then passes through a throttling valve to reduce its pressure, becoming a low-temperature, low-pressure, easily evaporable state. It then returns to the first heat exchanger indoors to evaporate and vaporize, absorbing heat and lowering the ambient temperature. This vapor is then blown into the room by the fan, achieving the desired cooling effect. Simultaneously, the gaseous refrigerant that has evaporated in the first heat exchanger is compressed again by the compressor, and the cycle repeats continuously.

[0097] When the air conditioner is in heating mode, the first heat exchanger is the condenser, and the second heat exchanger is the evaporator. The compressor compresses the refrigerant, turning it into a high-temperature, high-pressure gas. After flowing through the four-way valve, the high-temperature, high-pressure gas flows to the first heat exchanger, where it becomes a low-temperature, high-pressure liquid, releasing heat and being blown into the room by the fan to achieve the required heating effect. The low-temperature, high-pressure liquid then flows through the expansion valve to reduce its pressure and flows to the second heat exchanger. After evaporating and absorbing heat, it becomes a gas again and is drawn into the compressor for compression, forming a high-temperature, high-pressure gas. This cycle repeats continuously.

[0098] In some alternative embodiments of this utility model, the first heat exchanger is disposed in the outdoor unit of the air conditioner, and the second heat exchanger is disposed in the indoor unit of the air conditioner.

[0099] When the air conditioner is in cooling mode, the first heat exchanger is the condenser and the second heat exchanger is the evaporator. When the air conditioner is in heating mode, the first heat exchanger is the evaporator and the second heat exchanger is the condenser.

[0100] Therefore, those skilled in the art should recognize that although many exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. A testing apparatus for a circulating water test system, the circulating water test system comprising a first water pump, characterized in that, The testing apparatus includes: A water tank, wherein the water tank is a pressurized water tank; the water tank is connected to a water supply pipeline and a water return pipeline, the inlet of the first water pump is connected to the outlet of the water supply pipeline, and the outlet of the first water pump is connected to the inlet of the water return pipeline; An air compressor, which is connected to the interior of the water tank, is configured to provide gas to compress the water in the water tank so as to fill at least the water supply line and the first water pump with water when the first water pump stops.

2. The testing apparatus according to claim 1, characterized in that, Also includes: The second water pump is installed on the water supply pipeline and configured to cause the water in the water tank to flow to the first water pump.

3. The testing apparatus according to claim 2, characterized in that, Also includes: A first check valve is provided on the water supply pipeline and on a first pipe section between the first water pump and the second water pump, configured to prevent water in the water supply pipeline from flowing from the first water pump to the water tank. A second check valve is installed on the return water pipeline and configured to prevent water in the return water pipeline from flowing from the water tank to the first water pump.

4. The testing apparatus according to claim 3, characterized in that, Also includes: The third check valve is installed on the water supply pipeline and on the second pipe section between the water tank and the second water pump, and is configured to prevent water in the water supply pipeline from flowing from the second water pump to the water tank.

5. The testing apparatus according to claim 4, characterized in that, Both the first pipe section and the return water pipe are flexible hoses.

6. The testing apparatus according to claim 1, characterized in that, Also includes: The test module is connected to the water supply pipeline or the return pipeline; The test module includes one or more of a heat exchanger, a pressure regulating valve, and a flow regulating valve.

7. The testing apparatus according to claim 1, characterized in that, Also includes: A liquid detection device is installed at the inlet of the first water pump to detect the water pressure at the inlet of the first water pump, so as to detect whether there is water at the inlet of the first water pump. The air compressor and the liquid detection device are electrically connected through a control system, so that the control system adjusts the power of the air compressor according to the water pressure value at the inlet of the first water pump detected by the liquid detection device.

8. A testing system, characterized in that, include: The testing apparatus as described in any one of claims 1 to 7; A circulating water test system includes a first water pump, which is a centrifugal pump. The inlet and outlet of the centrifugal pump are connected to the water tank through a water supply pipeline and a water return pipeline, respectively. The height of the inlet and outlet of the centrifugal pump is higher than that of the water tank.

9. The testing system according to claim 8, characterized in that, It also includes at least two quick-connect fittings, wherein the inlet and outlet of the first water pump are each connected to the water supply pipe or the return pipe via one of the quick-connect fittings; the quick-connect fitting includes: A first connecting part, the first connecting part including a connecting cavity, one end of the connecting cavity having an opening and the other end having a first water outlet; a stop member that can move radially along the connecting cavity is provided inside the connecting cavity, and a first top post that can move axially along the connecting cavity, the first top post being configured to be subjected to a force toward the first water outlet, so as to cause the first top post to block the first water outlet. The second connecting part includes a connecting post, which is inserted into the connecting cavity from the opening; a stop groove is formed on the outer periphery of the connecting post, and a stop member is engaged in the stop groove; the connecting post is a hollow post, and a second water inlet is provided at one end of the connecting post near the first water inlet; a second top post is provided inside the connecting post and is movable along the axial direction of the connecting post; the second top post is configured to be subjected to a force toward the second water inlet to cause the second top post to block the second water inlet; the first top post and the second top post are configured to abut against each other and move when the connecting post is inserted into the connecting cavity to make the first water inlet and the second water inlet communicate. In one of the quick-connect fittings for the pipeline, one of the first connecting portion and the second connecting portion is connected to the inlet of the first water pump, and the other is connected to the outlet of the water supply pipeline; In another quick-connect fitting for the pipeline, one of the first connecting portion and the second connecting portion is connected to the outlet of the first water pump, and the other is connected to the inlet of the return water pipeline.

10. The testing system according to claim 8, characterized in that, The circulating water test system includes a first heat exchanger; the first heat exchanger includes a heat exchange inlet and a heat exchange outlet connected together; The outlet of the first water pump is connected to the heat exchange inlet of the first heat exchanger, and the heat exchange outlet of the first heat exchanger is connected to the inlet of the return water pipeline; or, the outlet of the water supply pipeline is connected to the heat exchange inlet of the first heat exchanger, and the heat exchange outlet of the first heat exchanger is connected to the inlet of the first water pump.

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