Three-loop hydraulic balance device of central air-conditioning cooling water system

Abstract

The utility model relates to a three-loop hydraulic balance device of a central air-conditioning cooling water system. The three-loop hydraulic balance device structurally comprises a refrigeration station cooling water circulation loop, a tower periphery cooling water circulation loop and a tower top cooling water circulation loop. The utility model has the advantages that the structure design is reasonable, the hydraulic balance of the cooling water system is realized, the uniform water distribution of each water distribution port of the cooling tower can be ensured, the operation efficiency of the cooling tower can be improved, the system is convenient to overhaul and switch, and the cooling water system is suitable for places with high requirements on the hydraulic uniformity of the cooling tower system, especially for places with high energy efficiency of the system. And high-efficiency refrigerating machine rooms and the like are provided.

Description

Technical Field

[0001] This utility model relates to a hydraulic balancing device, specifically a three-loop hydraulic balancing device for a central air conditioning cooling water system. Background Technology

[0002] Central air conditioning cooling towers are often the only heat source for refrigeration systems, and their heat dissipation effect is closely related to refrigeration efficiency. The hydraulic balance of the cooling water system is the key to ensuring the efficient operation of the system.

[0003] In existing technologies, cooling water systems typically employ a single-loop design, which suffers from problems such as hydraulic imbalance, low cooling tower efficiency, and difficulties in hydraulic balance adjustment. Especially when multiple cooling towers are operating in parallel, uneven distribution of pipe resistance can easily lead to excessively high or low water flow rates in some towers, affecting the overall cooling effect.

[0004] The above-mentioned hydraulic imbalance is more pronounced when the system operates with variable flow. To address these issues, existing technologies often use electric valves to regulate the flow of the cooling tower. However, in practical applications, electric valves are generally used for simple pipe opening and closing control and flow regulation, making it difficult to perform fine regulation. The overall hydraulic balance regulation effect is poor, and electric valves require more equipment and automation costs. Utility Model Content

[0005] This utility model proposes a three-loop hydraulic balancing device for a central air conditioning cooling water system. Its purpose is to overcome the above-mentioned shortcomings of the existing technology, realize the hydraulic balance of the cooling water system, and facilitate system maintenance and switching.

[0006] The technical solution of this utility model is a three-loop hydraulic balancing device for a central air conditioning cooling water system. Its structure includes several chiller units and several cooling towers mounted on the roof. The inlet and outlet of each chiller unit are connected to its inlet and outlet branch pipes, respectively. All chiller unit outlet branch pipes are connected to the cooling water circulation loop of the refrigeration station. Each cooling tower's bottom outlet is connected to a cooling tower outlet branch pipe, and all cooling tower outlet branch pipes are connected to a cooling water return pipe. The cooling water return pipe is connected to the inlet branch pipes of each chiller unit. Each cooling tower has inlets on both sides of its top, each connected to a cooling tower inlet branch pipe. The cooling tower inlet branch pipes connected to the inlets on both sides of all cooling towers are staggered to connect to the cooling water circulation loop around the tower. The refrigeration station cooling water circulation loop connects to the cooling water circulation loop around the tower. Simultaneous water intake from both sides forms a closed loop with the refrigeration room, preventing pressure differences caused by water entering from one side. The cooling water circulation loop around the tower can be arranged in a ring around the cooling tower to create a pressure equalization effect.

[0007] Preferably, each of the cooling tower inlet branch pipes is equipped with a branch pipe valve. This valve is used for maintenance opening and closing, and for adjustment during initial hydraulic balancing.

[0008] Preferably, the cooling water circulation loop at the top of the tower is staggered, connecting the branch pipe valves to the corresponding cooling tower top inlet branch pipes.

[0009] Preferably, a cooling tower maintenance valve is provided between the connection points of the adjacent cooling water circulation loop at the top of the tower and the cooling tower inlet branch pipe. This valve is used to cut off the water flow during valve maintenance.

[0010] The advantages of this utility model are: Its reasonable structural design achieves hydraulic balance in the cooling water system, ensuring uniform water distribution at each water outlet of the cooling tower, improving the operating efficiency of the cooling tower, and facilitating system maintenance and switching. It is suitable for applications requiring high hydraulic uniformity in the cooling tower system, especially in energy-efficient environments such as high-efficiency refrigeration rooms. Specifically,

[0011] 1) Adaptive hydraulic balance: Through the three-loop design and pressure equalization ring arrangement, the hydraulic imbalance problem in the existing technology system can be effectively solved, which can improve the operating efficiency of the cooling tower and is especially suitable for variable flow cooling tower systems;

[0012] 2) Convenient maintenance: By installing maintenance valves, the cooling tower can be maintained without shutting down, ensuring continuous operation of the system;

[0013] 3) Economic and reliable: The entire cooling water system utilizes the continuous loop pressure equalization characteristic to achieve hydraulic balance. The entire system has no moving parts, making it stable and reliable. Compared with existing electric valve control solutions, the overall cost is lower, and the economic advantages are more obvious. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the three-loop hydraulic balance device for the central air conditioning cooling water system of this utility model.

[0015] Figure 2 yes Figure 1 Schematic diagram of the roof loop and valve layout of the central cooling tower.

[0016] In the diagram, 1 is the chiller unit, 11 is the chiller unit inlet branch pipe, 12 is the chiller unit outlet branch pipe, 2 is the cooling tower, 21 is the cooling tower outlet branch pipe, 22 is the cooling tower inlet branch pipe, 23 is the branch pipe valve, 3 is the cooling water circulation loop of the refrigeration station, 4 is the cooling water circulation loop around the tower, 5 is the cooling water circulation loop at the top of the tower, 51 is the cooling tower maintenance valve, and 6 is the cooling water return pipe. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to embodiments and specific implementation methods.

[0018] like Figure 1 , 2 As shown, a three-loop hydraulic balancing device for a central air conditioning cooling water system comprises a cooling water circulation loop at the refrigeration station, a cooling water circulation loop around the tower, and a cooling water circulation loop at the top of the tower.

[0019] Cooling water circulation loop of the refrigeration station: Cooling water is supplied simultaneously from both sides of the cooling tower to avoid uneven water volume caused by different distances;

[0020] Cooling water circulation loop around the tower: The cooling water supply pipeline forms a loop around the cooling tower, generating a pressure equalization effect;

[0021] Top cooling water circulation loop: Minor pressure differences are further compensated by the top cooling water circulation loop.

[0022] In the specific design, it includes several chiller units 1 and several cooling towers 2 installed on the roof. The inlet and outlet of each chiller unit 1 are connected to the chiller unit inlet branch pipe 11 and the chiller unit outlet branch pipe 12, respectively. All chiller unit outlet branch pipes 12 are connected to the cooling water circulation loop 3 of the refrigeration station.

[0023] Each cooling tower 2 has a cooling tower outlet branch pipe 21 connected to its bottom outlet. All cooling tower outlet branch pipes 21 are connected to cooling water return pipes 6, and cooling water return pipes 6 are connected to the inlet branch pipes 11 of each chiller unit.

[0024] Each cooling tower 2 has water inlets on both sides of its top, and each inlet is connected to a cooling tower inlet branch pipe 22. All the cooling tower inlet branch pipes 22 connected to the water inlets on both sides of the cooling tower 2 are staggered and connected to the cooling water circulation loop 4 around the tower. The cooling water circulation loop 3 of the refrigeration station is connected to the cooling water circulation loop 4 around the tower. Simultaneous water intake from both sides forms a closed loop with the refrigeration room, preventing pressure differences caused by water entering from one side. The cooling water circulation loop 4 around the tower can be arranged in a ring around the cooling tower to create a pressure equalization effect.

[0025] Each cooling tower inlet branch pipe 22 is equipped with a branch pipe valve 23, which is used for maintenance opening and closing and adjustment during the initial hydraulic balance test.

[0026] The cooling water circulation loop 5 at the top of the tower is staggered with the branch pipe valve 23 and the corresponding cooling tower inlet branch pipe 22 between the top water inlet of the cooling tower 2.

[0027] A cooling tower maintenance valve 51 is installed between the connection point of the adjacent cooling water circulation loop 5 at the top of the tower and the cooling tower inlet branch pipe 22, for shutting off the water flow during valve maintenance. When a cooling tower needs maintenance, the corresponding branch pipe valve and the cooling tower maintenance valve are closed, and the operation is switched to another cooling tower, achieving convenient maintenance.

[0028] Based on the above structural design, in specific operations...

[0029] Cooling water circulation loop 3 of the refrigeration station:

[0030] The water from cooling tower 2 is collected by cooling water return pipe 6 and then connected to the cooling water return pipe (chiller inlet branch pipe 11) of the refrigeration room.

[0031] After the cooling water is heated by the chiller unit 1, it flows from the main pipes on both sides of the machine room to the roof cooling tower system.

[0032] The dual main pipe system of the computer room receives water from the left and right sides of the cooling tower 2 and is connected to the cooling water circulation loop 4 around the cooling tower.

[0033] Tower perimeter cooling water circulation loop 4:

[0034] The cooling water outlet pipe of the refrigeration room is connected to the main loop pipe around the cooling tower, forming a pressure equalization loop around the cooling tower 2.

[0035] Tower top cooling water circulation loop 5:

[0036] The water inlet branch pipes 22 of each cooling tower 2 are connected in series at the top of the tower to form a pressure equalization and connection loop.

[0037] Multiple cooling tower inlet branch pipes 2 are installed on the pressure equalization and connection loop, which are respectively connected to the inlet of each cooling tower 2. A throttling device can also be preferably installed on the cooling tower inlet branch pipe 2.

[0038] All of the components described above are existing technologies, and those skilled in the art can use any model and existing design that can achieve their corresponding functions.

[0039] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present utility model, and these all fall within the protection scope of the present utility model.

Claims

1. A three-loop hydraulic balancing device for a central air conditioning cooling water system, characterized in that, It includes several chiller units (1) and several cooling towers (2) installed on the roof. The inlet and outlet of each chiller unit (1) are connected to the chiller unit inlet branch pipe (11) and the chiller unit outlet branch pipe (12), respectively. All chiller unit outlet branch pipes (12) are connected to the cooling water circulation loop (3) of the refrigeration station. The outlet of each cooling tower (2) is connected to a cooling tower outlet branch pipe (21). All cooling tower outlet branch pipes (21) are connected to the cooling water return pipe (6). The cooling water return pipe (6) is connected to the inlet branch pipe (11) of each chiller unit. Each cooling tower (2) has an inlet on both sides of the top. Each inlet is connected to a cooling tower inlet branch pipe (22). The cooling tower inlet branch pipes (22) connected to the inlets on both sides of all cooling towers (2) are staggered to connect to the cooling water circulation loop (4) around the tower. The cooling water circulation loop (3) of the refrigeration station is connected to the cooling water circulation loop (4) around the tower.

2. The three-loop hydraulic balancing device for a central air conditioning cooling water system as described in claim 1, characterized in that, Each cooling tower inlet branch pipe (22) is equipped with a branch pipe valve (23).

3. The three-loop hydraulic balancing device for a central air conditioning cooling water system as described in claim 2, characterized in that, The cooling water circulation loop (5) at the top of the tower is staggered to connect the branch valve (23) and the corresponding cooling tower (2) top water inlet branch pipe (22).

4. The three-loop hydraulic balancing device for a central air conditioning cooling water system as described in claim 3, characterized in that, A cooling tower maintenance valve (51) is provided between the connection point of the adjacent cooling water circulation loop (5) at the top of the tower and the cooling tower inlet branch pipe (22).

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