Detection platform of central air-conditioning refrigerating unit and detection method thereof

Abstract

The invention discloses a detection platform of a central air-conditioning refrigerating unit and a detection method thereof, the detection platform comprises a refrigerating unit body, the refrigerating unit body comprises a cold water outlet, a cold water inlet, a cooling water outlet and a cooling water inlet, the detection platform further comprises a heat exchanger, and the cold water outlet is connected to a shell pass inlet of the heat exchanger; a shell pass outlet of the heat exchanger is connected with a cold water pool, a cooling water outlet is connected with a flow dividing pipe, one end of the flow dividing pipe is connected to a tube pass inlet of the heat exchanger, the other end of the flow dividing pipe is connected to an inlet of the cooling tower, and a tube pass outlet of the heat exchanger and an outlet of the cooling tower are both connected to the cooling water pool. According to the detection platform, closed circulation of cold water and cooling water is formed, a cold water system and a cooling water system during actual operation of the refrigerating unit body are simulated, temperature, pressure and flow changes of cold water and cold area water in the unit can be truly reflected, and basic data are provided for detecting the refrigerating efficiency of the unit.

Description

Technical Field

[0001] The invention relates to a detection platform and a detection method for a central air-conditioning refrigeration unit. Background Art

[0002] The water circulation system for central air conditioning refrigeration units consists of a chilled water system and a cooling water system. Pipes connect the fan coil units in each room to the hot and cold water units, providing both cooling and heating. This water system offers flexible layout and adaptability to complex room configurations. It also offers strong independent regulation, allowing for decentralized use and independent operation in different areas.

[0003] As the core equipment in large-scale building air conditioning systems, the operating status of central air conditioning chillers is directly related to the energy efficiency and stability of the entire system. Traditionally, chiller inspections rely primarily on manual inspections and scheduled maintenance. This method is inefficient, labor-intensive, and difficult to implement in real time, making it easy to miss potential issues.

[0004] With the rapid development of the Internet of Things and big data technologies, the development of intelligent and automated chiller testing platforms has become an inevitable trend in the industry. However, existing chiller testing platforms have numerous limitations: most platforms are limited in functionality, focusing solely on monitoring operating parameters or performing fault diagnosis, lacking the ability to comprehensively assess overall chiller performance and predict future operating conditions. Furthermore, some platforms lack comprehensive data collection, failing to capture key chiller operation indicators. Furthermore, these platforms often occupy large areas, require high initial investment, and have complex structures, making them difficult to widely adopt in practical applications. Summary of the Invention

[0005] The main purpose of the present invention is to provide a detection platform and a detection method for a central air-conditioning refrigeration unit to solve the problems raised in the above background.

[0006] The purpose of the present invention can be achieved by adopting the following technical solutions: A testing platform for a central air-conditioning refrigeration unit includes a refrigeration unit body, the refrigeration unit body including a cold water outlet, a cold water inlet, a cooling water outlet, and a cooling water inlet, and further includes a heat exchanger, the cold water outlet being connected to the shell-side inlet of the heat exchanger, the shell-side outlet of the heat exchanger being connected to a cold water pool, and the cold water in the cold water pool being returned to the cold water inlet by a cold water pump; The cooling water outlet is connected to a shunt pipe, one end of which is connected to the tube-side inlet of the heat exchanger, and the other end of which is connected to the inlet of the cooling tower. The tube-side outlet of the heat exchanger and the outlet of the cooling tower are both connected to a cooling water pool, and the cooling water in the cooling water pool is returned to the cooling water inlet through a cooling water pump; Temperature detection components are provided at the cold water outlet, cold water inlet, cooling water outlet, cooling water inlet, shell side outlet of the heat exchanger, tube side outlet of the heat exchanger and outlet of the cooling tower; The cold water outlet, cold water inlet, cooling water outlet, cooling water inlet, shell side outlet of the heat exchanger, tube side inlet of the heat exchanger, tube side outlet of the heat exchanger, inlet of the cold water pump, outlet of the cold water pump, inlet of the cooling tower, outlet of the cooling tower, inlet of the cooling water pump and outlet of the cooling water pump are provided with a pressure detection component; Flow detection components are provided at the cold water outlet, cold water inlet, cooling water outlet, cooling water inlet and cooling tower inlet.

[0007] Preferably, a cold water outlet temperature sensor, a cold water outlet pressure gauge and a cold water outlet flow meter are provided at the cold water outlet, a shell side outlet temperature sensor and a shell side outlet pressure gauge are provided at the shell side outlet of the heat exchanger, a cold water pump inlet pressure gauge and a cold water pump outlet pressure gauge are provided at the inlet and outlet of the cold water pump respectively, and a cold water inlet temperature sensor, a cold water inlet pressure gauge and a cold water inlet flow meter are provided at the cold water inlet; The cooling water outlet is provided with a cooling water outlet temperature sensor, a cooling water outlet pressure gauge and a cooling water outlet flow meter, the tube side inlet of the heat exchanger is provided with a tube side inlet pressure gauge, the tube side outlet of the heat exchanger is provided with a tube side outlet temperature sensor and a tube side outlet pressure gauge, the cooling tower inlet is provided with a cooling tower inlet flow meter and a cooling tower inlet pressure gauge, the cooling tower outlet is provided with a cooling tower outlet temperature sensor and a cooling tower outlet pressure gauge, the inlet and outlet of the cooling water pump are respectively provided with a cooling water pump inlet pressure gauge and a cooling water pump outlet pressure gauge, the cooling water inlet is provided with a cooling water inlet temperature sensor, a cooling water inlet pressure gauge and a cooling water inlet flow meter.

[0008] Preferably, the cold water outlet, cold water inlet, cooling water outlet and cooling water inlet are respectively provided with a cold water outlet valve, a cold water inlet valve, a cooling water outlet valve and a cooling water inlet valve; the inlet and outlet of the cold water pump are respectively provided with a cold water pump inlet valve and a cold water pump outlet valve; the inlet and outlet of the cooling water pump are respectively provided with a cooling water pump inlet valve and a cooling water pump outlet valve.

[0009] Preferably, a flow regulating valve is provided on the diversion pipe.

[0010] Preferably, a cold water return pipe is provided at the outlet of the cold water pump, the cold water return pipe is connected to the cold water pool, and a cold water return regulating valve is provided on the cold water return pipe.

[0011] Preferably, a cooling water return pipe is provided at the outlet of the cooling water pump, the cooling water return pipe is connected to the cooling water pool, and a cooling water return regulating valve is provided on the cooling water return pipe.

[0012] Preferably, a filter is provided between the cooling tower and the cooling water pool.

[0013] A method for detecting a detection platform of a central air-conditioning refrigeration unit comprises the following steps: Step S1: The cold water at the cold water outlet flows to the shell side of the heat exchanger. At the same time, a portion of the cooling water at the cooling water outlet flows to the tube side of the heat exchanger. The cold water and the cooling water exchange heat in the heat exchanger. The cold water outlet temperature, cold water outlet pressure, and cold water outlet flow rate are measured. The cooling water outlet temperature, cooling water outlet pressure P6, and cooling water outlet flow rate are measured. The inlet pressure of the tube side of the heat exchanger is measured. Another portion of the cooling water at the cooling water outlet flows to the cooling tower. The cooling tower inlet flow rate is measured. Step S2: The cold water at the shell-side outlet of the heat exchanger flows to the cold water pool. The cold water in the cold water pool is transported to the cold water inlet by a cold water pump. The pressure at the inlet and outlet of the cold water pump is measured, and the temperature, pressure, and flow rate of the cold water inlet are measured. Step S3: The cooling water at the outlet of the heat exchanger tube side flows to the cooling water pool, and the temperature and pressure of the outlet of the heat exchanger tube side are measured; Step S4: The cooling water from the cooling tower flows to the cooling water pool, and the temperature and pressure at the cooling tower outlet are measured; Step S5: The cooling water in the cooling water pool is transported to the cooling water outlet by a cooling water pump, and the pressure at the inlet and outlet of the cooling water pump is measured, and the temperature, pressure and flow rate of the cooling water inlet are measured; Step S6: Analyze the operating conditions and refrigeration capacity of the refrigeration unit according to the above-measured temperature, pressure and flow data.

[0014] Compared with the prior art, the beneficial technical effects of the present invention are: 1. The testing platform of the present invention simulates the actual operation of the chiller's chiller and cooling water systems by forming a closed loop of chilled water and cooling water. This can truly reflect the temperature, pressure, and flow changes of chilled water and cold zone water in the unit, providing basic data for testing the unit's refrigeration efficiency. This simulation environment, which is close to actual working conditions, not only ensures the reliability and reference value of the test results, but also accurately captures the performance characteristics of the unit under different loads through the linkage analysis of full-process parameters, providing a comprehensive and practical experimental basis for the unit's optimized design, troubleshooting, and energy efficiency improvement.

[0015] 2. The present invention uses a heat exchanger and a cooling tower to work together, sharing part of the heat dissipation load through heat exchange, thereby reducing the heat dissipation pressure of the cooling tower. Through the rational allocation and efficient utilization of energy, the dependence on the cooling tower is greatly reduced. There is no need to design an oversized cooling tower according to the maximum heat dissipation capacity of the unit. Its physical scale and supporting facilities can be reduced accordingly. While reducing the site occupation, the operating energy consumption of the cooling tower is significantly reduced, ultimately forming the dual advantages of "energy saving + land saving".

[0016] 3. The cold water pool and cooling water pool of the present invention serve as the storage and circulation centers of cold water and cooling water respectively. The cold water flows in a closed loop between the refrigeration unit body, the heat exchanger and the cold water pool, and the cooling water circulates between the refrigeration unit body, the cooling tower, the heat exchanger and the cooling water pool, avoiding the one-time consumption of water resources and greatly reducing the demand for water replenishment. It is especially suitable for the water-saving needs during long-term testing of large units. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the overall structure of the detection platform of an embodiment of the present invention; Figure 2 This is an overall top view of the detection platform of an embodiment of the present invention; Figure 3 This is a schematic structural diagram of a cold water system for a detection platform according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the locations of the temperature, pressure, and flow detection components of the cold water system of the detection platform according to an embodiment of the present invention; Figure 5 A top view of a cold water system for a detection platform according to an embodiment of the present invention; Figure 6 This is a schematic structural diagram of a cooling water system for a detection platform according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the locations of the temperature, pressure, and flow detection components of the cooling water system of the detection platform according to an embodiment of the present invention; Figure 8 A top view of a cooling water system for a testing platform according to an embodiment of the present invention; Figure 9 It is an overall plan view of the detection platform of an embodiment of the present invention; Figure 10 A plan view of a cold water system for a detection platform according to an embodiment of the present invention; Figure 11 This is a plan view of the cooling water system of the detection platform according to an embodiment of the present invention.

[0018] In the figure: 1. Refrigeration unit body; 2. Cold water outlet; 3. Cold water inlet; 4. Cooling water outlet; 5. Cooling water inlet; 6. Heat exchanger; 7. Cold water tank; 8. Cold water pump; 9. Diverter pipe; 10. Cooling tower; 11. Cooling water tank; 12. Cooling water pump; 13. Cold water outlet temperature sensor; 14. Cold water outlet pressure gauge; 15. Cold water outlet flow meter; 16. Shell side outlet temperature sensor; 17. Shell side outlet pressure gauge; 18. Cold water pump inlet pressure gauge; 19. Cold water pump outlet pressure gauge; 20. Cold water inlet temperature sensor; 21. Cold water inlet pressure gauge; 22. Cold water inlet flow meter; 23. Cooling water outlet temperature sensor; 24. Cooling water outlet pressure gauge; 25. Cooling water outlet flow meter; 26. Pipe side inlet pressure gauge; 27. Pipe side outlet temperature sensor; 2 8. Pipeline outlet pressure gauge; 29. ​​Cooling tower inlet flow meter; 30. Cooling tower outlet temperature sensor; 31. Cooling tower outlet pressure gauge; 32. Cooling water pump inlet pressure gauge; 33. Cooling water pump outlet pressure gauge; 34. Cooling water inlet temperature sensor; 35. Cooling water inlet pressure gauge; 36. Cooling water inlet flow meter; 37. Cold water outlet valve; 38. Cold water inlet valve; 39. Cooling water outlet valve; 40. Cooling water inlet valve; 41. Cold water pump inlet valve; 42. Cold water pump outlet valve; 43. Cooling water pump inlet valve; 44. Cooling water pump outlet valve; 45. Flow regulating valve; 46. Cold water return pipe; 47. Cold water return regulating valve; 48. Cooling water return pipe; 49. Cooling water return regulating valve; 50. Filter; 51. Cooling tower inlet pressure gauge. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] See also Figures 1 to 11 , the present invention provides a central air conditioning refrigeration unit detection platform embodiment: A testing platform for a central air-conditioning refrigeration unit includes a refrigeration unit body 1, the refrigeration unit body 1 including a cold water outlet 2, a cold water inlet 3, a cooling water outlet 4, and a cooling water inlet 5, and further includes a heat exchanger 6, the cold water outlet 2 is connected to the shell-side inlet of the heat exchanger 6, and the shell-side outlet of the heat exchanger 6 is connected to a cold water tank 7, and the cold water in the cold water tank 7 is returned to the cold water inlet 3 through a cold water pump 8; A shunt pipe 9 is connected to the cooling water outlet 4. One end of the shunt pipe 9 is connected to the tube-side inlet of the heat exchanger 6, and the other end of the shunt pipe 9 is connected to the inlet of the cooling tower 10. The tube-side outlet of the heat exchanger 6 and the outlet of the cooling tower 10 are both connected to a cooling water pool 11. The cooling water in the cooling water pool 11 is returned to the cooling water inlet 5 through a cooling water pump 12. A closed cycle of cold water and cooling water is formed to simulate the cold water system and cooling water system of the refrigeration unit body 1 during actual operation, which can truly reflect the temperature, pressure and flow changes of cold water and cold zone water in the unit, and provide basic data for detecting the refrigeration efficiency of the unit.

[0021] During the extended testing period of the refrigeration unit 1, the cooling water must be continuously cooled to ensure system stability. Relying solely on cooling tower 10 to handle the heat dissipation task would not only require a larger site to accommodate the tower and supporting facilities required to meet the maximum heat dissipation requirements, but would also significantly increase energy consumption due to the long-term full-load operation of cooling tower 10.

[0022] At the same time, the chilled water system must maintain a stable heat load to ensure continuous testing. To this end, heat exchanger 6 allows the cold water to exchange heat with some of the cooling water. This not only raises the cold water temperature to meet the heat load, but also simultaneously lowers the cooling water temperature, effectively sharing the heat dissipation pressure of cooling tower 10. This design significantly reduces reliance on cooling tower 10 through the rational allocation and efficient utilization of energy. It eliminates the need to oversize the cooling tower 10 based on the unit's maximum heat dissipation capacity, allowing its physical size and supporting facilities to be reduced accordingly. This reduces site usage while significantly reducing the cooling tower 10's operating energy consumption, ultimately achieving the dual advantages of "energy and land conservation."

[0023] Temperature detection components are provided at the cold water outlet 2, the cold water inlet 3, the cooling water outlet 4, the cooling water inlet 5, the shell side outlet of the heat exchanger 6, the tube side outlet of the heat exchanger 6 and the outlet of the cooling tower 10; Temperature data is the key basis for judging whether the unit is operating normally and whether there is heat loss. Setting temperature detection components at each key node can monitor the temperature changes of each link in real time, directly reflecting the core performance indicators such as the cooling efficiency of the refrigeration unit body 1, the heat exchange effect of the heat exchanger 6, and the cooling effect of the cooling tower 10.

[0024] Pressure detection components are provided at the cold water outlet 2, the cold water inlet 3, the cooling water outlet 4, the cooling water inlet 5, the shell side outlet of the heat exchanger 6, the tube side inlet of the heat exchanger 6, the tube side outlet of the heat exchanger 6, the inlet of the cold water pump 8, the outlet of the cold water pump 8, the inlet of the cooling tower 10, the outlet of the cooling tower 10, the inlet of the cooling water pump 12 and the outlet of the cooling water pump 12; The pressure detection component can be used to monitor the system's pressure loss, such as pipeline resistance, heat exchanger resistance, and pressure difference before and after the water pump, to determine whether the pipeline is blocked, whether the water pump head meets the standard, whether the valve is opened normally, and other issues.

[0025] Pressure data can help troubleshoot hydraulic balance problems in the system, ensure smooth circulation of chilled water and cooling water, and avoid unit overload or efficiency loss due to abnormal pressure.

[0026] Flow detection components are provided at the cold water outlet 2 , the cold water inlet 3 , the cooling water outlet 4 , the cooling water inlet 5 and the inlet of the cooling tower 10 .

[0027] Flow detection components are installed at the cold water outlet 2, cold water inlet 3, cooling water outlet 4, cooling water inlet 5 and cooling tower 10 inlet to obtain the circulation flow of the medium. Combined with the temperature difference, the cooling capacity of the unit can be calculated. Cooling capacity = flow × specific heat capacity × temperature difference, which directly evaluates the cooling capacity of the unit.

[0028] The flow data can also reflect the load distribution of the system and record the diversion ratio of the cooling water entering the heat exchanger 6 and the cooling tower 10 in the diversion pipe 9, providing a basis for optimizing the operating parameters.

[0029] The temperature, pressure, and flow rate detection components convert the monitored data into electrical signals, which are then transmitted via circuits to a data acquisition device. After processing the signals, the data acquisition device displays them in real time on a dedicated monitoring screen or dashboard. Workers can directly view the data on these displays, ensuring the stable operation of the refrigeration unit 1.

[0030] The water pipes inserted into the cold water pool 7 and the cooling water pool 11 are about 0.5m away from the bottom of the pool. On the one hand, this ensures the suction water level of the water pump, and on the other hand, it prevents impurities precipitated at the bottom from entering the unit and interfering with the system operation.

[0031] Furthermore, a cold water outlet temperature sensor 13, a cold water outlet pressure gauge 14 and a cold water outlet flow meter 15 are provided at the cold water outlet 2, a shell side outlet temperature sensor 16 and a shell side outlet pressure gauge 17 are provided at the shell side outlet of the heat exchanger 6, a cold water pump inlet pressure gauge 18 and a cold water pump outlet pressure gauge 19 are provided at the inlet and outlet of the cold water pump 8 respectively, and a cold water inlet temperature sensor 20, a cold water inlet pressure gauge 21 and a cold water inlet flow meter 22 are provided at the cold water inlet 3; A cooling water outlet temperature sensor 23, a cooling water outlet pressure gauge 24 and a cooling water outlet flow meter 25 are provided at the cooling water outlet 4, a pipe side inlet pressure gauge 26 is provided at the pipe side inlet of the heat exchanger 6, a pipe side outlet temperature sensor 27 and a pipe side outlet pressure gauge 28 are provided at the pipe side outlet of the heat exchanger 6, a cooling tower inlet flow meter 29 and a cooling tower inlet pressure gauge 51 are provided at the inlet of the cooling tower 10, a cooling tower outlet temperature sensor 30 and a cooling tower outlet pressure gauge 31 are provided at the outlet of the cooling tower 10, a cooling water pump inlet pressure gauge 32 and a cooling water pump outlet pressure gauge 33 are provided at the inlet and outlet of the cooling water pump 12 respectively, and a cooling water inlet temperature sensor 34, a cooling water inlet pressure gauge 35 and a cooling water inlet flow meter 36 are provided at the cooling water inlet 5.

[0032] Furthermore, cold water outlet 2, cold water inlet 3, cooling water outlet 4 and cooling water inlet 5 are respectively provided with cold water outlet valve 37, cold water inlet valve 38, cooling water outlet valve 39 and cooling water inlet valve 40, the inlet and outlet of the cold water pump 8 are respectively provided with cold water pump inlet valve 41 and cold water pump outlet valve 42, and the inlet and outlet of the cooling water pump 12 are respectively provided with cooling water pump inlet valve 43 and cooling water pump outlet valve 44.

[0033] Among them, the cold water outlet valve 37 and the cooling water outlet valve 39 use venting ball valves, the cold water inlet valve 38, the cooling water inlet valve 40, the cold water pump inlet valve 41 and the cooling water pump inlet valve 43 use gate valves, and the outlet of the cold water pump 8 and the outlet of the cooling water pump 12 use check valves.

[0034] Furthermore, a flow regulating valve 45 is provided on the diversion pipe 9, which accurately controls the heat exchange amount between the cooling water and the cold water in the heat exchanger 6 by adjusting the flow distribution, thereby meeting the heat load demand of the cold water system; in conjunction with the heat dissipation capacity of the cooling tower 10, it adapts to the cooling requirements of refrigeration units of different models, so that the detection platform can always maintain the stable operation of the cooling water system when testing multiple units, thereby improving the flexibility and adaptability of the detection.

[0035] Furthermore, a cold water return pipe 46 is provided at the outlet of the cold water pump 8, the cold water return pipe 46 is connected to the cold water pool 7, and a cold water return regulating valve 47 is provided on the cold water return pipe 46. A cooling water return pipe 48 is provided at the outlet of the cooling water pump 12, the cooling water return pipe 48 is connected to the cooling water pool 11, and a cooling water return regulating valve 49 is provided on the cooling water return pipe 48.

[0036] When testing different refrigeration units, their demands for chilled and cooling water vary. The chilled water return regulating valve 47 and the cooling water return regulating valve 49 direct excess water from the pump outlet back to the corresponding reservoir. Combined with the main valves and flow meters, the flow rates of the chilled and cooling water systems can be quickly stabilized within the required range for the unit under test. This eliminates the need for frequent pump starts and stops or equipment replacements, significantly improving the test platform's adaptability to different units.

[0037] When the water consumption of the unit under test suddenly decreases or when a pipeline valve is adjusted, the system may experience pressure fluctuations. The return pipe acts as a pressure buffer, releasing excess water flow to release excessive pressure, preventing water pump overload or pipeline overpressure, protecting the refrigeration unit, water pump, and pipeline components, and ensuring stable operation during the test process.

[0038] Furthermore, a filter 50 is provided between the cooling tower 10 and the cooling water pool 11 to filter impurities in the cooling water and prevent the impurities from entering the cooling water circulation system, thereby ensuring long-term stable operation of the system and reducing detection errors caused by impurities.

[0039] A method for detecting a detection platform of a central air-conditioning refrigeration unit comprises the following steps: Step S1: The cold water at the cold water outlet 2 flows to the shell side of the heat exchanger 6. At the same time, a portion of the cooling water at the cooling water outlet 4 flows to the tube side of the heat exchanger 6. The cold water and the cooling water exchange heat in the heat exchanger 6. The temperature, pressure, and flow rate of the cold water outlet 2 are measured. The temperature, pressure, and flow rate of the cooling water outlet 4 are measured. The inlet pressure of the tube side of the heat exchanger 6 is measured. Another portion of the cooling water at the cooling water outlet 4 flows to the cooling tower 10. The inlet flow rate of the cooling tower 10 is measured. Step S2: The cold water at the shell-side outlet of the heat exchanger 6 flows to the cold water tank 7. The cold water in the cold water tank 7 is transported to the cold water inlet 3 by the cold water pump 8. The pressure at the inlet and outlet of the cold water pump 8 is measured, and the temperature, pressure, and flow rate of the cold water inlet 3 are measured. Step S3: The cooling water at the tube-side outlet of the heat exchanger 6 flows to the cooling water pool 11, and the temperature and pressure at the tube-side outlet of the heat exchanger 6 are measured; Step S4: The cooling water from the cooling tower 10 flows to the cooling water pool 11, and the temperature and pressure at the outlet of the cooling tower 10 are measured; Step S5: The cooling water in the cooling water pool 11 is delivered to the cooling water outlet 4 by the cooling water pump 12, the pressure at the inlet and outlet of the cooling water pump 12 is measured, and the temperature, pressure and flow rate of the cooling water inlet 5 are measured; Step S6: Analyze the operating conditions and refrigeration capacity of the refrigeration unit body 1 based on the above-measured temperature, pressure and flow data.

[0040] When the refrigeration unit 1 stops running, open the cold water outlet valve 37 and the cooling water outlet valve 39 to allow the water in the unit to flow naturally into the cold water tank 7 and the cooling water tank 11 under the influence of gravity. After the water in the unit is drained, close the cold water inlet valve 38, the cooling water inlet valve 40, the cold water pump inlet valve 41, and the cooling water pump inlet valve 43.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A detection platform for a central air-conditioning refrigeration unit, comprising a refrigeration unit body (1), wherein the refrigeration unit body (1) comprises a cold water outlet (2), a cold water inlet (3), a cooling water outlet (4) and a cooling water inlet (5), characterized in that: It also includes a heat exchanger (6), the cold water outlet (2) is connected to the shell-side inlet of the heat exchanger (6), the shell-side outlet of the heat exchanger (6) is connected to a cold water pool (7), and the cold water in the cold water pool (7) is returned to the cold water inlet (3) through a cold water pump (8); The cooling water outlet (4) is connected to a shunt pipe (9), one end of the shunt pipe (9) is connected to the pipe-side inlet of the heat exchanger (6), and the other end of the shunt pipe (9) is connected to the inlet of the cooling tower (10). The pipe-side outlet of the heat exchanger (6) and the outlet of the cooling tower (10) are both connected to a cooling water pool (11), and the cooling water in the cooling water pool (11) is returned to the cooling water inlet (5) through a cooling water pump (12); Temperature detection components are provided at the cold water outlet (2), the cold water inlet (3), the cooling water outlet (4), the cooling water inlet (5), the shell-side outlet of the heat exchanger (6), the tube-side outlet of the heat exchanger (6) and the outlet of the cooling tower (10); Pressure detection components are provided at the cold water outlet (2), the cold water inlet (3), the cooling water outlet (4), the cooling water inlet (5), the shell side outlet of the heat exchanger (6), the tube side inlet of the heat exchanger (6), the tube side outlet of the heat exchanger (6), the inlet of the cold water pump (8), the outlet of the cold water pump (8), the inlet of the cooling tower (10), the outlet of the cooling tower (10), the inlet of the cooling water pump (12), and the outlet of the cooling water pump (12); Flow detection components are provided at the cold water outlet (2), the cold water inlet (3), the cooling water outlet (4), the cooling water inlet (5) and the inlet of the cooling tower (10).

2. A detection platform for a central air-conditioning refrigeration unit according to claim 1, characterized in that: The cold water outlet (2) is provided with a cold water outlet temperature sensor (13), a cold water outlet pressure gauge (14) and a cold water outlet flow meter (15); the shell side outlet of the heat exchanger (6) is provided with a shell side outlet temperature sensor (16) and a shell side outlet pressure gauge (17); the inlet and outlet of the cold water pump (8) are provided with a cold water pump inlet pressure gauge (18) and a cold water pump outlet pressure gauge (19), respectively; the cold water inlet (3) is provided with a cold water inlet temperature sensor (20), a cold water inlet pressure gauge (21) and a cold water inlet flow meter (22); The cooling water outlet (4) is provided with a cooling water outlet temperature sensor (23), a cooling water outlet pressure gauge (24), and a cooling water outlet flow meter (25); the tube side inlet of the heat exchanger (6) is provided with a tube side inlet pressure gauge (26); the tube side outlet of the heat exchanger (6) is provided with a tube side outlet temperature sensor (27) and a tube side outlet pressure gauge (28); the cooling tower (10) inlet is provided with a cooling tower inlet flow meter (29) and a cooling tower inlet pressure gauge (51); the cooling tower (10) outlet is provided with a cooling tower outlet temperature sensor (30) and a cooling tower outlet pressure gauge (31); the inlet and outlet of the cooling water pump (12) are respectively provided with a cooling water pump inlet pressure gauge (32) and a cooling water pump outlet pressure gauge (33); the cooling water inlet (5) is provided with a cooling water inlet temperature sensor (34), a cooling water inlet pressure gauge (35), and a cooling water inlet flow meter (36).

3. A detection platform for a central air-conditioning refrigeration unit according to claim 1, characterized in that: The cold water outlet (2), cold water inlet (3), cooling water outlet (4) and cooling water inlet (5) are respectively provided with a cold water outlet valve (37), a cold water inlet valve (38), a cooling water outlet valve (39) and a cooling water inlet valve (40); the inlet and outlet of the cold water pump (8) are respectively provided with a cold water pump inlet valve (41) and a cold water pump outlet valve (42); the inlet and outlet of the cooling water pump (12) are respectively provided with a cooling water pump inlet valve (43) and a cooling water pump outlet valve (44).

4. A detection platform for a central air-conditioning refrigeration unit according to claim 1, characterized in that: The diversion pipe (9) is provided with a flow regulating valve (45).

5. The detection platform for a central air-conditioning refrigeration unit according to claim 1, characterized in that: A cold water return pipe (46) is provided at the outlet of the cold water pump (8), the cold water return pipe (46) is connected to the cold water tank (7), and a cold water return regulating valve (47) is provided on the cold water return pipe (46).

6. A detection platform for a central air-conditioning refrigeration unit according to claim 1, characterized in that: A cooling water return pipe (48) is provided at the outlet of the cooling water pump (12), the cooling water return pipe (48) is connected to the cooling water pool (11), and a cooling water return regulating valve (49) is provided on the cooling water return pipe (48).

7. The detection platform for a central air-conditioning refrigeration unit according to claim 1, characterized in that: A filter (50) is provided between the cooling tower (10) and the cooling water pool (11).

8. A method for detecting a detection platform of a central air-conditioning refrigeration unit according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step S1: The cold water at the cold water outlet (2) flows to the shell side of the heat exchanger (6). At the same time, a portion of the cooling water at the cooling water outlet (4) flows to the tube side of the heat exchanger (6). The cold water and the cooling water exchange heat in the heat exchanger (6). The temperature, pressure and flow rate of the cold water outlet (2) are measured. The temperature, pressure and flow rate of the cooling water outlet (4) are measured. The inlet pressure of the tube side of the heat exchanger (6) is measured. Another portion of the cooling water at the cooling water outlet (4) flows to the cooling tower (10). The inlet flow rate of the cooling tower (10) is measured. Step S2: The cold water at the shell-side outlet of the heat exchanger (6) flows to the cold water pool (7), and the cold water in the cold water pool (7) is transported to the cold water inlet (3) through the cold water pump (8). The pressures at the inlet and outlet of the cold water pump (8) are measured, and the temperature, pressure, and flow rate of the cold water inlet (3) are measured. Step S3: The cooling water at the outlet of the tube side of the heat exchanger (6) flows to the cooling water pool (11), and the temperature and pressure at the outlet of the tube side of the heat exchanger (6) are measured; Step S4: The cooling water of the cooling tower (10) flows to the cooling water pool (11), and the temperature and pressure at the outlet of the cooling tower (10) are measured; Step S5: The cooling water in the cooling water pool (11) is transported to the cooling water outlet (4) through the cooling water pump (12), the pressures at the inlet and outlet of the cooling water pump (12) are measured, and the temperature, pressure and flow rate of the cooling water inlet (5) are measured; Step S6: Analyze the operating conditions and refrigeration capacity of the refrigeration unit body (1) based on the above-mentioned measured temperature, pressure and flow data.

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