Cooling water centralized supply system for ultra-clean optical laboratory

Abstract

The utility model relates to a cooling water centralized supply system for an ultra-clean optical laboratory, which comprises an ultra-filtration water replenishing module, a siphon dosing module, a heat exchange box, a buffer water tank and a centrifugal gathering box, the ultra-filtration water replenishing module is provided with a water inlet, and a water outlet of the ultra-filtration water replenishing module is connected with a water inlet of the siphon dosing module; a water outlet of the siphon dosing module is connected with a water inlet of the heat exchange box, a water outlet of the heat exchange box is connected with a water inlet of the buffer water tank, a water outlet of the buffer water tank is connected with a water inlet of the centrifugal gathering box, and a water outlet of the centrifugal gathering box is connected with equipment needing to be cooled in the ultra-clean optical laboratory. The device has the advantages that the device does not need to occupy the area of an ultra-clean laboratory, reduces the influence of the external environment on a precise optical experiment, realizes unified water supply, has important significance on improvement of the space utilization rate of the ultra-clean laboratory and energy conservation and environmental protection of the laboratory, and can be maintained by different modules to guarantee continuous operation of a laser and a vacuum pump in the laboratory.

Description

Technical Field

[0001] This utility model relates to the field of energy-saving renovation technology for clean optical laboratories, specifically to a centralized cooling water supply system for clean optical laboratories, and more particularly to a centralized cooling water circulation and supply system for high-energy-consuming equipment in clean optical laboratories. Background Technology

[0002] Currently, high-power lasers, large vacuum systems, and other equipment consume a lot of energy and generate significant heat. To ensure the continuous and stable operation of these devices and prevent heat accumulation in critical components, circulating water cooling is used to cool these components to their most efficient operating temperature. With increased national investment in scientific and technological research, many universities have built ultra-clean optical laboratories for cutting-edge optical research. These laboratories typically house a large number of high-power lasers and large vacuum systems. These energy-intensive devices usually require a considerable number of water chillers to ensure the normal operation of the lasers and vacuum pumps. These water chillers not only occupy a significant amount of space in the cleanroom but also increase the load on the temperature control equipment during operation. The water chillers are a major source of heat, noise, and vibration in cleanrooms, posing a significant challenge to energy-saving renovations and precision optical measurements.

[0003] Therefore, there is an urgent need for a centralized cooling water supply system to replace the large number of water chillers in clean laboratories. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the existing technology by providing a centralized cooling water supply system for ultra-clean optical laboratories. By incorporating an ultrafiltration water replenishment module, a siphon dosing module, a heat exchange box, a buffer water tank, and a centrifugal sedimentation box, this system provides cooling water for equipment such as lasers and vacuum pumps in large vacuum systems. It can replace water chillers in ultra-clean optical laboratories and has positive significance in energy-saving renovations of ultra-clean laboratories and in stabilizing the temperature, humidity, and vibration of ultra-clean laboratories.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A centralized cooling water supply system for an ultra-clean optical laboratory is characterized by comprising an ultrafiltration water replenishment module, a siphon dosing module, a heat exchange tank, a buffer tank, and a centrifugal sedimentation tank. The ultrafiltration water replenishment module has an inlet, its outlet is connected to the inlet of the siphon dosing module, the outlet of the siphon dosing module is connected to the inlet of the buffer tank, the outlet of the buffer tank is connected to the inlet of the heat exchange tank, the outlet of the heat exchange tank is connected to the inlet of the centrifugal sedimentation tank via a bypass, and the outlet of the centrifugal sedimentation tank is connected to the equipment requiring cooling within the ultra-clean optical laboratory.

[0007] The ultrafiltration water replenishment module includes a pre-filter, a PP cotton filter element, a granular activated carbon filter element, a high-density activated carbon rod, and an ultrafiltration reverse osmosis unit connected in sequence. The pre-filter is connected to the inlet of the ultrafiltration water replenishment module, and the ultrafiltration reverse osmosis unit is connected to the outlet of the ultrafiltration water replenishment module.

[0008] The siphon dosing module includes a module cartridge containing pipeline maintenance reagent. The module cartridge is connected to the inlet and outlet of the siphon dosing module, and a control valve is installed in the pipeline.

[0009] The control valve is connected to a pH sensor.

[0010] The heat exchange box includes a stainless steel box body, inside which a cooling water coil is installed. The cooling water coil is provided with a chilled water inlet and a cooling water outlet, and the stainless steel box body is provided with an inlet and an outlet.

[0011] The buffer tank includes a double-layered stainless steel tank body, which is provided with an inlet and an outlet, and is equipped with an automatic air extraction valve.

[0012] The stainless steel double-layer box is equipped with a return water inlet.

[0013] The centrifugal sedimentation tank includes a cylindrical stainless steel sedimentation tank body and a primary filter cotton. The bottom of the cylindrical stainless steel sedimentation tank body is provided with a conical spiral sedimentation bottom, and the bottom of the conical spiral sedimentation bottom is provided with a drain outlet. The cylindrical stainless steel sedimentation tank body is provided with a water inlet, and the water outlet of the cylindrical stainless steel sedimentation tank body is connected to the water inlet of the primary filter cotton. The primary filter cotton is provided with an outlet connected to the equipment that needs to be cooled in the ultra-clean optical laboratory.

[0014] A return water path is provided between the equipment requiring cooling in the ultra-clean optical laboratory and the buffer water tank.

[0015] The advantages of this utility model are:

[0016] 1) No need to occupy the cleanroom area; simply connect the inlet and outlet water ends of the laser vacuum pump to the indoor inlet and outlet water pipes.

[0017] 2) The equipment inside the laboratory consists only of water inlet and outlet pipes, water pressure gauges, and valves. It will not introduce other mechanical vibrations into the cleanroom, nor will it generate heat inside the laboratory, thus reducing the impact of the external environment on precision optical experiments.

[0018] 3) It can centrally replace most of the water chillers for lasers, vacuum pumps and other equipment in cleanroom optical laboratories, and achieve unified water supply, which is of great significance for improving the space utilization rate of cleanroom laboratories and energy conservation and environmental protection in laboratories.

[0019] 4) Modular maintenance can be adopted. During this process, equipment maintenance steps such as replacing filter elements and removing impurities do not require shutting down, ensuring the continuous operation of lasers and vacuum pumps inside the laboratory. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the system configuration of this utility model;

[0021] Figure 2 This is a schematic diagram of the ultrafiltration water replenishment module in this utility model;

[0022] Figure 3 This is a schematic diagram of the siphon dosing module in this utility model;

[0023] Figure 4 This is a schematic diagram of the heat exchange box in this utility model;

[0024] Figure 5 This is a schematic diagram of the buffer water tank in this utility model;

[0025] Figure 6 This is a schematic diagram of the centrifugal sedimentation tank in this utility model;

[0026] Figure 7 This is a schematic diagram of the conical bottom of the centrifugal sedimentation box in this utility model. Detailed Implementation

[0027] The features and other related features of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate the understanding of those skilled in the art:

[0028] like Figure 1-7 As shown in the figure, each label represents:

[0029] Ultrafiltration water replenishment module 1, siphon dosing module 2, heat exchange box 3, buffer water tank 4, centrifugal sedimentation box 5, bypass 6, return water line 7, equipment 8;

[0030] Automatic water inlet 111, pre-filter 11, PP cotton filter element 12, granular activated carbon filter element 13, high-density activated carbon rod 14, purified water outlet 112;

[0031] Inlet 211, Inlet 212, Module cartridge 21, Control valve 22, Control valve 23, Outlet 213;

[0032] Chilled water coil 31, stainless steel housing 32, circulating cooling water inlet 311, circulating cooling water outlet 312, chilled water inlet 313, chilled water outlet 314;

[0033] Stainless steel double-layer tank 41, automatic air extraction valve 42, water inlet 411, water outlet 412, return water inlet 413;

[0034] Cylindrical stainless steel sedimentation tank 51, conical spiral sedimentation bottom 52, drain outlet 53, primary filter cotton 54, water inlet 511, water outlet 512.

[0035] Example: Figure 1 As shown, the centralized cooling water supply system for the ultra-clean optical laboratory in this embodiment mainly includes an ultrafiltration water replenishment module 1, a siphon dosing module 2, a heat exchange box 3, a buffer water tank 4, a centrifugal sedimentation box 5, and a bypass 6.

[0036] like Figure 2 As shown, the ultrafiltration water replenishment module 1 in this embodiment includes an automatic water inlet 111. Tap water enters the ultrafiltration water replenishment module 1 through the automatic water inlet 111, and the ultrafiltration water replenishment module 1 filters the tap water to obtain pure water. Specifically, the tap water passes through the pre-filter 11 to remove larger particles such as rust and sediment; then it passes through the PP cotton filter 12, the granular activated carbon filter 13, and the high-density activated carbon rod 14 to filter and adsorb residual chlorine, bacteria, and small organic molecules in the tap water; finally, it passes through the ultra-reverse osmosis unit (not shown in the figure) to filter colloids, bacteria, and organic matter in the water, obtaining purified water that meets the water quality requirements of equipment such as lasers and vacuum pumps. The purified water is then supplied to the siphon dosing module 2 through the purified water outlet 112.

[0037] In this embodiment, the ultrafiltration water replenishment module 1 adopts a three-stage stepped filtration unit consisting of a pre-stage, a middle stage, and a post-stage to improve the filtration effect. Specifically, the pre-stage filtration unit uses a 40µm pre-filter, the middle stage uses a combination of PP cotton, granular activated carbon filter element, and high-density activated carbon rod, and the post-stage filtration unit uses an ultrafiltration membrane filtration unit group.

[0038] like Figure 3 As shown, the siphon dosing module 2 has two inlets, namely inlet 211 and inlet 212, connected to the ultrafiltration water replenishment module 1. The main body of the siphon dosing module 2 is the module dosing cartridge 21, which can be easily screwed off or installed to add pipeline maintenance reagents such as disinfectants and flocculants. Control valves 22 and 23 can control the concentration of drugs in the circulation system. Control valve 23 is installed on the pipeline passing through the module dosing cartridge 21, while control valve 22 is installed on the pipeline not passing through the module dosing cartridge 21. In this embodiment, control valve 22 can be set as an automatic valve, connected to the pH sensor of the circulation pipeline, to automatically control the concentration of drugs in the circulating water; alternatively, a bypass manual control valve can be used for manual dosing control.

[0039] like Figure 4As shown, the heat exchange box 3 includes a stainless steel housing 32, one end of which is provided with a circulating cooling water inlet 311, which is connected to the outlet 213 of the siphon dosing module. A chilled water coil 31 is installed inside the stainless steel housing 31 to provide a cooling source for the circulating water; one end of the chilled water coil 32 is the chilled water inlet 313, and the other end is the chilled water outlet 314. The other end of the stainless steel housing 32 is the circulating cooling water outlet 312, which provides constant-temperature cooling water for equipment 8 such as lasers and vacuum pumps.

[0040] In this embodiment, the chilled water coil 31 can be made of high heat exchange efficiency copper pipe network with a design filling ratio of 1:2, and the pipe network is evenly distributed in the stainless steel box 32. The stainless steel box 32 is a rectangular stainless steel box and is wrapped with aluminum foil-covered insulation cotton to reduce heat loss during the heat exchange process and effectively prevent condensation.

[0041] like Figure 5 As shown, the buffer water tank 4 includes a double-layered stainless steel tank 41, on which an automatic air extraction valve 42 is installed. When the vacuum level inside the double-layered stainless steel tank 41 decreases, the automatic air extraction valve 42 automatically opens, extracting air from the inside of the tank to prevent heat exchange between the tank and the external environment. The buffer water tank 4 is used to store excess cooling capacity and can buffer the heat directly transferred from the laser and vacuum pump, mitigating sudden temperature changes. The double-layered stainless steel tank 41 is equipped with an inlet 411, an outlet 412, and a return water inlet 413. The inlet 411 is connected to the circulating cooling water outlet 312, and the outlet 412 is connected to the inlet of the centrifugal sedimentation tank 5.

[0042] Combination Figure 6 and Figure 7 As shown, the centrifugal sedimentation tank 5 includes a cylindrical stainless steel sedimentation tank body 51, with a conical spiral sedimentation bottom 52 at its bottom. Water flows tangentially into the cylindrical stainless steel sedimentation tank body 51 from the top of the cone along the inlet 511, spiraling in the same direction. The conical spiral sedimentation bottom 52 guides the water flow to undergo centrifugal motion within the cylindrical stainless steel sedimentation tank body 51. The cooling water circulates in a closed-loop system for a long time, passing through heat exchange coils of various materials (aluminum, copper, iron, plastic, etc.), where residual bacteria and algae multiply rapidly and aggregate under the action of the flocculant. After the circulating water enters the sedimentation tank, due to centrifugal force, the sediment is guided by the spiral channels at the bottom of the tank and accumulates at the drain outlet 53. The drain outlet 53 is made of a transparent, pressure-resistant material for observing the amount of sediment and for timely cleaning. The cylindrical stainless steel sedimentation tank 51 is connected to a primary filter cotton 54 for further filtration. The outlet 512 is located at the top of the cylindrical stainless steel sedimentation tank 51. Since the sediment is centrifugally deposited at the bottom of the sedimentation tank, the outlet 512 is clean cooling water.

[0043] The outlet 512 is directly connected to equipment 8 in the cleanroom that requires cooling, such as lasers and vacuum pumps. After absorbing the heat emitted by the lasers and vacuum pumps, the cooling water enters the buffer tank 4 through the return water management system, the return water path 7, and the return water outlet 413. When the buffer tank 4 is full or needs to be cooled again, the buffer tank 4 returns the cooling water to the heat exchange box 3 through the return water path.

[0044] Bypass 6 can quickly cool down the equipment. Its opening size is controlled by a differential pressure valve to ensure the water pressure of the laser and vacuum system.

[0045] In specific implementation, this embodiment may include the following applications:

[0046] Water-cooled replacement for coherent femtosecond lasers:

[0047] Currently, laser water chillers primarily cool the output crystal of the amplifier. This crystal is extremely sensitive to temperature, and temperature changes significantly affect the laser's output power and beam quality. The laser's internal cooling system consists mostly of capillary cooling channels, which are prone to clogging and require extremely high water quality. Typically, purified water is needed, with the addition of laser-specific corrosion inhibitors, and the water must be changed every three months. The water chiller also has a filter cartridge that needs to be replaced every six months. The operation is cumbersome; each replacement requires shutdown, and restarting requires at least 48 hours of circulation.

[0048] Based on the laser's required temperature setting of 20℃ and water pressure, the circulating cooling water system was configured.

[0049] Tap water first passes through the ultrafiltration water replenishment module 1 to obtain purified water that meets the requirements of the laser. Then, it passes through the siphon dosing module 2, where sensors (the pH value depends on the original laser cooling circulating fluid) continuously adjust the opening ratio of control valves 22 and 23 to perform chemical dosing in the circulating water circuit. The chemical components are mainly bactericides (inhibiting the growth of bacteria and algae in the circulating water) and agglomerants (aggregating algae and other impurities that have grown after long-term water circulation). The mixture first enters the buffer tank 4 through the inlet 411. After the buffer tank 4 is full, the water pump is turned on, and the water enters the heat exchange tank 3 through the circulating cooling water inlet 311. Based on the data fed back by the temperature sensor in the circulating water circuit, the cooling capacity of the chilled water coil 31 is controlled to cool the circulating water to 20°C. Subsequently, the cooling water enters the centrifugal sedimentation tank through the bypass 6 to remove large impurities in the water by centrifugation, and then passes through the primary filter cotton 54 before exiting through the outlet 512. The laser's inlet is connected to outlet 512 via a pressure relief valve. Circulating water carries away the heat generated by the laser. The laser outlet connects to the return outlet 413 of buffer tank 4, where the water enters and buffers the laser's heat. This process repeats until the water temperature in buffer tank 4 approaches the laser's normal operating temperature. The return water has minimal impact on the buffer tank 4's temperature, and the bypass 6 opening decreases, allowing the circulating water to store excess cooling energy in buffer tank 4. At this point, the entire circulation pipeline is operational.

[0050] Although the above embodiments have described the concept and embodiments of the present invention in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.

Claims

1. A centralized cooling water supply system for an ultra-clean optical laboratory, characterized in that: The system includes an ultrafiltration water replenishment module, a siphon dosing module, a heat exchange box, a buffer water tank, and a centrifugal sedimentation tank. The ultrafiltration water replenishment module is equipped with an inlet, and its outlet is connected to the inlet of the siphon dosing module. The outlet of the siphon dosing module is connected to the inlet of the buffer water tank, and the outlet of the buffer water tank is connected to the inlet of the heat exchange box. The outlet of the heat exchange box is connected to the inlet of the centrifugal sedimentation tank via a bypass, and the outlet of the centrifugal sedimentation tank is connected to equipment requiring cooling within the cleanroom optical laboratory.

2. The centralized cooling water supply system for an ultra-clean optical laboratory according to claim 1, characterized in that: The ultrafiltration water replenishment module includes a pre-filter, a PP cotton filter element, a granular activated carbon filter element, a high-density activated carbon rod, and an ultrafiltration reverse osmosis unit connected in sequence. The pre-filter is connected to the inlet of the ultrafiltration water replenishment module, and the ultrafiltration reverse osmosis unit is connected to the outlet of the ultrafiltration water replenishment module.

3. The centralized cooling water supply system for an ultra-clean optical laboratory according to claim 1, characterized in that: The siphon dosing module includes a module cartridge containing pipeline maintenance reagent. The module cartridge is connected to the inlet and outlet of the siphon dosing module, and a control valve is installed in the pipeline.

4. A centralized cooling water supply system for an ultra-clean optical laboratory according to claim 3, characterized in that: The control valve is connected to a pH sensor.

5. A centralized cooling water supply system for an ultra-clean optical laboratory according to claim 1, characterized in that: The heat exchange box includes a stainless steel box body, inside which a cooling water coil is installed. The cooling water coil is provided with a chilled water inlet and a cooling water outlet, and the stainless steel box body is provided with an inlet and an outlet.

6. A centralized cooling water supply system for an ultra-clean optical laboratory according to claim 1, characterized in that: The buffer tank includes a double-layered stainless steel tank body, which is provided with an inlet and an outlet, and is equipped with an automatic air extraction valve.

7. A centralized cooling water supply system for an ultra-clean optical laboratory according to claim 6, characterized in that: The stainless steel double-layer box is equipped with a return water inlet.

8. A centralized cooling water supply system for an ultra-clean optical laboratory according to claim 1, characterized in that: The centrifugal sedimentation tank includes a cylindrical stainless steel sedimentation tank body and a primary filter cotton. The bottom of the cylindrical stainless steel sedimentation tank body is provided with a conical spiral sedimentation bottom, and the bottom of the conical spiral sedimentation bottom is provided with a drain outlet. The cylindrical stainless steel sedimentation tank body is provided with a water inlet, and the water outlet of the cylindrical stainless steel sedimentation tank body is connected to the water inlet of the primary filter cotton. The primary filter cotton is provided with an outlet connected to the equipment that needs to be cooled in the ultra-clean optical laboratory.

9. A centralized cooling water supply system for an ultra-clean optical laboratory according to claim 1, characterized in that: A return water path is provided between the equipment requiring cooling in the ultra-clean optical laboratory and the buffer water tank.

Images