Cooling water treatment system of central air conditioner

Abstract

The utility model relates to a central air conditioner cooling water treatment system which comprises a condenser, a cooling tower, a water supply pipe, a water return pipe, a cooling water treatment assembly and a central controller. The water outlet end of the condenser is connected with the water inlet end of the cooling tower through a water supply pipe, the water outlet end of the cooling tower is connected with the water inlet end of the condenser through a water return pipe, and a circulating pump is arranged on the water supply pipe; the cooling water treatment assembly is arranged between the water supply pipe and the water return pipe; the cooling water treatment assembly comprises a drainage tube, an ORP sensor and a dosing device; the water inlet end of the drainage pipe is communicated with the water supply pipe and located between the water inlet end of the water supply pipe and the circulating pump, and the water outlet end of the drainage pipe is communicated with the water return pipe; the ORP sensor and the dosing device are arranged on the drainage tube and are sequentially arranged in the flowing direction of water in the drainage tube, the detection end of the ORP sensor extends into a cavity of the drainage tube, and the central controller is electrically connected with the output end of the ORP sensor.

Description

Technical Field

[0001] This application relates to the field of cooling water circulation technology for central air conditioning, and more particularly to a central air conditioning cooling water treatment system. Background Technology

[0002] In central air conditioning systems, cooling water plays a crucial role as the primary heat dissipation medium. The cooling water in central air conditioning cooling water pipes is usually recycled. When the cooling water circulates, the suitable environmental conditions such as temperature and humidity make it easy for bacteria, algae, and other microorganisms to grow. These microorganisms gradually adhere to the inner wall of the cooling water pipes as the cooling water flows. Over time, the amount of microorganisms attached increases, leading to blockage of the cooling water pipes and affecting their service life.

[0003] Therefore, how to clean the cooling water of central air conditioning has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, this application proposes a central air conditioning cooling water treatment system, including: a condenser, a cooling tower, a water supply pipe, a water return pipe, a cooling water treatment component, and a central controller;

[0005] The outlet of the condenser is connected to the inlet of the cooling tower via a water supply pipe, and the outlet of the cooling tower is connected to the inlet of the condenser via a return pipe. A circulation pump is installed on the water supply pipe. The cooling water treatment assembly is located between the water supply pipe and the return pipe.

[0006] The cooling water treatment components include: a drain pipe, an ORP sensor, and a dosing device;

[0007] The inlet end of the drainage pipe is connected to the water supply pipe, and the inlet end of the drainage pipe is located between the inlet end of the water supply pipe and the circulating pump. The outlet end of the drainage pipe is connected to the return water pipe. The ORP sensor and the dosing device are installed on the drainage pipe and arranged in sequence along the direction of water flow in the drainage pipe. The detection end of the ORP sensor is inserted into the cavity of the drainage pipe. The central controller is electrically connected to the output end of the ORP sensor.

[0008] The dosing device includes: a drug tank, a stirrer, and a dosing pump; the stirrer is fixed on the top of the drug tank, and the stirring part of the stirrer extends into the cavity of the drug tank; the dosing pump is fixed on the top of the drug tank, the inlet of the dosing pump is connected to the cavity of the drug tank through a first infusion tube, and the outlet of the dosing pump is connected to a drainage tube through a second infusion tube.

[0009] In one possible implementation, three dosing devices are provided, arranged sequentially along the direction of water flow in the drainage pipe.

[0010] In one possible implementation, a drain pipe is also included; the drain pipe is connected to the diversion pipe, and the inlet of the drain pipe is located between the dosing device and the ORP sensor.

[0011] In one possible implementation, a solenoid valve is installed on the drain pipe.

[0012] In one possible implementation, a conductivity sensor is also included; the conductivity sensor is mounted on the drainage tube, with its detection end inserted into the cavity of the drainage tube, and the central controller is electrically connected to the output end of the conductivity sensor.

[0013] In one possible implementation, a pH sensor is also included; the pH sensor is mounted on the drainage tube and positioned adjacent to the ORP sensor, with the detection end of the pH sensor extending into the cavity of the drainage tube, and the central controller is electrically connected to the output end of the pH sensor.

[0014] In one possible implementation, the inlet end of the drainage pipe is equipped with a sensor switch; the sensor switch is electrically connected to the central controller.

[0015] In one possible implementation, the inductive switch includes: a housing, a waterstop plate, a first sensor, and a second sensor; the housing has a cavity with openings at both ends, the two ends of which are mounted on a drain pipe, a rotating shaft is provided inside the housing, one side of the waterstop plate is hinged to the housing via the rotating shaft, the second sensor is fixedly mounted on the top of the housing and electrically connected to a central controller, and the first sensor is fixedly mounted on the waterstop plate, suitable for the first sensor and the second sensor to come into contact with each other when cooling water impacts the waterstop plate.

[0016] In one possible implementation, the inductive switch further includes a limiting part; the limiting part is fixedly disposed within the housing and is located in the circumferential direction of the waterstop plate rotating about the axis.

[0017] Beneficial effects of this application

[0018] By installing a cold dosing device, an oxidizing bactericide is added to the cooling water in the diversion pipe. The dosing water then flows from the outlet of the diversion pipe into the return pipe and circulates in the central air conditioning cooling water system. This effectively inhibits the growth of bacteria, algae and other microorganisms in the cooling water, reduces the formation of biofilm, ensures that the cooling water always maintains good water quality, reduces the risk of blockage in the supply and return pipes, and ensures the stable operation of the central air conditioning cooling water system.

[0019] The ORP sensor, dosing device, and central controller work together. The ORP sensor monitors the cooling water quality in the drainage pipe in real time, and transmits the detection results to the central controller. The central controller opens or closes the dosing device based on the detection data, thereby controlling the dosage of chemicals added to the drainage pipe, reducing unnecessary consumption caused by excessive chemical addition, and lowering operating costs. At the same time, by timely detecting the cooling water quality and performing precise chemical dosing, good cooling water quality can be maintained and cooling efficiency can be improved.

[0020] Other features and aspects of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0021] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.

[0022] Figure 1 This paper shows a schematic diagram of the main structure of the central air conditioning cooling water treatment system of this application;

[0023] Figure 2 A perspective view of the dosing device;

[0024] Figure 3 A cross-sectional view of the inductive switch is shown;

[0025] Figure 4 This diagram illustrates the connections between the central controller and the various components. Detailed Implementation

[0026] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0027] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0030] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0031] This application proposes a central air conditioning cooling water treatment system, such as Figures 1 to 4 As shown, the system includes: a condenser 110, a cooling tower 120, a water supply pipe 130, a return water pipe 140, a cooling water treatment assembly, and a central controller 500. The outlet of the condenser 110 is connected to the inlet of the cooling tower 120 via the water supply pipe 130, and the outlet of the cooling tower 120 is connected to the inlet of the condenser 110 via the return water pipe 140. A circulation pump 131 is installed on the water supply pipe 130. The cooling water treatment assembly is located between the water supply pipe 130 and the return water pipe 140. The cooling water treatment assembly includes: a diversion pipe 210, an ORP sensor 220, and a dosing device. The inlet of the diversion pipe 210 is connected to the water supply pipe 130, and the inlet of the diversion pipe 210 is located between the inlet of the water supply pipe 130 and the circulation pump 131. The outlet of the diversion pipe 210 is connected to the return water pipe 140. 140 connection; ORP sensor 220 and dosing device are arranged on the drainage pipe 210 and arranged sequentially along the water flow direction in the drainage pipe 210. The detection end of ORP sensor 220 is inserted into the cavity of drainage pipe 210. The central controller 500 is electrically connected to the output end of ORP sensor 220. The dosing device includes: a medicine tank 231, a stirrer 232 and a dosing pump 233. The stirrer 232 is fixed on the top of the medicine tank 231, and the stirring part 2321 of the stirrer 232 is inserted into the cavity of the medicine tank 231. The dosing pump 233 is fixed on the top of the medicine tank 231. The inlet of the dosing pump 233 is connected to the cavity of the medicine tank 231 through the first infusion pipe 261. The outlet of the dosing pump 233 is connected to the drainage pipe 210 through the second infusion pipe 262.

[0032] It should be noted that the condenser 110 and cooling tower 120 are existing cooling equipment in the central air conditioning system. The water supply pipe 130 is used to transport cooling water from the condenser 110 to the cooling tower 120, and the return water pipe 140 is used to return the cooled water to the condenser 110. The condenser 110, water supply pipe 130, cooling tower 120 and return water pipe 140 are connected in series to form a cooling water circulation path. The circulation pump 131 is located at the inlet end of the water supply pipe 130 and is used to supply water... The cooling water in pipe 130 provides power. The design of the circulating pump 131 ensures that the water pressure in the supply pipe 130 is greater than the water pressure in the return pipe 140, thus creating a supply and return water pressure difference. This prevents backflow or stagnation of the cooling water and ensures that the cooling water flows in the predetermined direction. The two ends of the diversion pipe 210 are connected to the supply pipe 130 and the return pipe 140, respectively. The diversion pipe 210 is suitable for introducing part of the cooling water from the supply pipe 130 into the cooling water treatment component. The design of the diversion pipe 210 can achieve this without interfering with the cooling... In the case of water circulation, cooling water treatment and monitoring are achieved. The ORP sensor 220 and the dosing device are arranged sequentially along the water flow direction in the diversion pipe 210 to realize the operation of first detecting and then adding chemicals to the cooling water in the diversion pipe 210, thereby ensuring that the cooling water is treated in a timely and effective manner. The ORP sensor 220 is suitable for detecting the oxidation-reduction potential of the cooling water in the diversion pipe 210 (oxidation-reduction potential is an indicator that measures the relative content of oxidizing and reducing substances in water. If there are more reducing substances in the cooling water, the possibility of microbial growth is greater). The ORP sensor 220 transmits the detected oxidation-reduction potential data to the central controller 500. The dosing device is suitable for adding chemicals to the cooling water. By adding chemicals to the cooling water in the diversion pipe 210, the dosing device improves the water quality of the cooling water and avoids pipe blockage caused by microorganisms in the cooling water adhering to the water supply pipe 130 or the return pipe 140, thereby improving the operating efficiency of the central air conditioning cooling system.

[0033] like Figure 1 , Figure 2 As shown, the medicine tank 231 is suitable for storing the corresponding medicines, preventing external impurities from entering the medicines. The stirring part 2321 of the stirrer 232 extends into the cavity of the medicine tank 231, and the stirring makes the medicines in the medicine tank 231 more uniform, preventing the medicines from settling or separating. The dosing pump 233 is fixedly installed on the top of the medicine tank 231, and the dosing pump 233 is electrically connected to the central controller 500. The central controller 500 controls the opening or closing of the dosing device based on the oxidation-reduction potential data detected by the ORP sensor 220. The drainage tube 210 is provided with a mounting part 211, which matches the second infusion tube 262. The medicine outlet end of the second infusion tube 262 is connected to the drainage tube 210 through the mounting part 211.

[0034] Furthermore, the dispensing end of the second infusion tube 262 is provided with a connecting part, and the inner side wall of the connecting part is provided with an internal thread. Correspondingly, the mounting part 211 is provided with an external thread that matches the connecting part. The second infusion tube 262 is threadedly connected to the mounting part 211 through the connecting part.

[0035] Furthermore, one end of the first infusion tube 261 located inside the medicine tank 231 is provided with a bottom water inlet valve 2611, and the bottom water inlet valve 2611 is located at the bottom of the medicine tank 231.

[0036] Furthermore, the stirring section 2321 consists of stirring blades.

[0037] Specifically, the dosing device contains a chlorine dioxide-based oxidizing bactericide, which is suitable for adding to the drainage pipe 210. The oxidizing bactericide can kill or inhibit the growth of microorganisms in the cooling water, reduce the content of microorganisms in the cooling water, ensure that the oxidation-reduction potential of the cooling water is controlled within a first threshold, improve the heat transfer efficiency of the cooling water, and reduce energy consumption and operating costs. When the cooling water flows through the drainage pipe 210, the ORP sensor 220 detects the oxidation-reduction potential of the cooling water in the drainage pipe 210 and uploads the detection data to the central controller 500. The central controller 500 controls the opening or closing of the dosing device based on the first preset threshold. When the oxidation-reduction potential value is greater than the first preset threshold, the dosing device is opened to dosing the drainage pipe 210; conversely, when the oxidation-reduction potential value is less than the first preset threshold, the dosing device is closed to stop dosing the drainage pipe 210.

[0038] The first preset threshold value ranges from 400mV to 450mV, and preferably, the first preset threshold value is 420mV.

[0039] Preferably, the central controller 500 is an industrial computer with the existing model nFioc-2400, and the ORP sensor 220 is a sensor with the existing model GO-100.

[0040] By installing a cold dosing device, an oxidizing bactericide is added to the cooling water in the drain pipe 210. The dosing-treated cooling water flows from the outlet of the drain pipe 210 into the return pipe 140 and then circulates within the central air conditioning cooling water system. This effectively inhibits the growth of bacteria, algae, and other microorganisms in the cooling water, reduces biofilm formation, ensures consistently good cooling water quality, reduces the risk of blockage in the supply pipe 130 and return pipe 140, and guarantees the stable operation of the central air conditioning cooling water system. The ORP sensor 220, the dosing device, and the central air conditioning system are also included. The controller 500 works in conjunction with the ORP sensor 220, which monitors the cooling water quality in the drainage pipe 210 in real time. Simultaneously, the ORP sensor 220 transmits the detection results to the central controller 500. Based on the detection data, the central controller 500 opens or closes the dosing device, thereby controlling the dosage of chemicals added to the drainage pipe 210. This reduces unnecessary consumption caused by excessive chemical addition and lowers operating costs. At the same time, by timely detecting the cooling water quality and performing precise chemical dosing, good cooling water quality can be maintained, improving cooling efficiency.

[0041] In one possible implementation, the feed pump 233 is a peristaltic pump as in the prior art.

[0042] In one possible implementation, a liquid level measuring instrument 234 is installed inside the reagent tank 231, and the detection end of the liquid level measuring instrument 234 extends into the bottom of the reagent tank 231; the liquid level measuring instrument 234 can accurately measure the liquid level height of the reagent in the reagent tank 231, so that the operator can know the remaining amount of reagent in real time and avoid the situation where the reagent runs out and the dosing pump 233 may run dry.

[0043] Preferably, the liquid level measuring instrument 234 adopts the LJT-200 submersible liquid level gauge, which is a type of liquid level gauge in the prior art.

[0044] In one possible implementation, valves 240 are provided at both ends of the drainage pipe 210. One valve 240 is installed at the inlet end of the drainage pipe 210, and the other valve 240 is installed at the outlet end of the drainage pipe 210. The two valves 240 work together to control the opening and closing of the drainage pipe 210.

[0045] In one possible implementation, three dosing devices are provided, arranged sequentially along the water flow direction within the diversion pipe 210.

[0046] It should be noted here that, in order to more comprehensively and effectively address the complex and varied microbial communities in the cooling water, the three dosing devices each carry different reagents. Specifically, for example... Figure 1 , Figure 4As shown, the three dosing devices can be divided into three categories based on the different chemicals used: a first dosing device 2301 containing an oxidizing bactericide, a second dosing device 2302 containing a non-oxidizing bactericide, and a third dosing device 2303 containing a corrosion and scale inhibitor. The central controller 500 controls the opening and closing of the first dosing device 2301 based on the data detected by the ORP sensor 220, which can be directly referred to the steps described above and will not be repeated here. The central controller 500 controls the opening and closing of the second dosing device 2302 and the third dosing device 2303 at regular intervals.

[0047] Specifically, the central controller 500 is equipped with a timer, the output of which is electrically connected to the input of the central controller 500. The central controller 500 controls the opening and closing of the second dosing device 2302 and the third dosing device 2303 based on the time interval set by the timer. After the current dosing operation of non-oxidizing bactericide and corrosion inhibitor in the drain pipe 210 is completed, the timer is started. After the timer reaches the preset duration, the next dosing operation of non-oxidizing bactericide and corrosion inhibitor is performed. The time interval set by the timer can be set according to the dosing requirements. The value range of the time interval is 1W-4W, preferably 2W.

[0048] It should be noted that the non-oxidizing bactericide is isothiazolinone, which is suitable for preventing microorganisms in cooling water from developing drug resistance and avoiding the decline in the effectiveness of oxidizing bactericides due to increased microbial resistance; the corrosion and scale inhibitor is organophosphorus slow-release scale inhibitor, which is suitable for adjusting the pH of cooling water, preventing impurities in cooling water from forming scale in cooling water pipes, and avoiding blockage of cooling water pipes.

[0049] In one possible implementation, a drain pipe 310 is also included; the drain pipe 310 is connected to the diversion pipe 210, and the inlet end of the drain pipe 310 is located between the dosing device and the ORP sensor 220. It should be noted that the inlet end of the drain pipe 310 is connected to the diversion pipe 210, and the outlet end of the drain pipe 310 discharges the wastewater in the diversion pipe 210 to the wastewater recycling tank. Timely discharge of wastewater prevents it from re-entering the return pipe 140 and causing blockage in the supply pipe 130 or return pipe 140. Simultaneously, centralized recycling and treatment of wastewater meets environmental protection requirements and reduces environmental pollution.

[0050] Furthermore, a solenoid valve 320 is provided on the sewage pipe 310, which is suitable for controlling the discharge of sewage in the diversion pipe 210. The solenoid valve 320 is electrically connected to the central controller 500, and the central controller 500 can control the opening or closing of the solenoid valve 320.

[0051] In one possible implementation, a conductivity sensor 510 is also included. The conductivity sensor 510 is disposed on the drainage pipe 210, with its detection end extending into the cavity of the drainage pipe 210. The central controller 500 is electrically connected to the output end of the conductivity sensor 510. It should be noted that the conductivity sensor 510 is a GC-28 sensor, a model already in the art. The conductivity sensor 510 is arranged adjacent to the ORP sensor 220. The conductivity sensor 510 is suitable for detecting the conductivity of the cooling water, and it transmits the detected conductivity data to the central controller 500.

[0052] Furthermore, the central controller 500 can control the opening or closing of the solenoid valve 320 based on the conductivity data transmitted by the conductivity sensor 510. Specifically, when cooling water flows in the drain pipe 210, the conductivity sensor 510 detects the cooling water in the drain pipe 210 and uploads the detection data to the central controller 500. The central controller 500 controls the opening or closing of the solenoid valve 320 based on a second preset threshold. When the detected conductivity is greater than the second preset threshold, the solenoid valve 320 is opened to discharge the sewage in the drain pipe 210. Conversely, when the conductivity is less than the second preset threshold, the solenoid valve 320 is closed to stop the discharge of sewage in the drain pipe 210.

[0053] The second preset value is: 1750μS / cm--1800μS / cm.

[0054] In one possible implementation, a pH sensor 520 is also included; the pH sensor 520 is disposed on the drainage tube 210 and adjacent to the ORP sensor 220, the detection end of the pH sensor 520 extends into the cavity of the drainage tube 210, and the central controller 500 is electrically connected to the output end of the pH sensor 520.

[0055] It should be noted that the pH sensor 520 is used to detect the acidity or alkalinity of the cooling water in the drainage pipe 210. The opening and closing of the second dosing device 2302 and the third dosing device 2303 of this application can be set based on the detection data of the pH sensor 520. Specifically, when the cooling water flows in the drainage pipe 210, the pH sensor 520 detects the pH value of the cooling water in the drainage pipe 210 and uploads the detection data to the central controller 500. The central controller 500 controls the opening or closing of the second dosing device 2302 and the third dosing device 2303 based on a third preset threshold. When the pH value is greater than the third preset threshold, the second dosing device 2302 and the third dosing device 2303 are turned on to perform a dosing operation on the drainage pipe 210. Conversely, when the pH value is less than the third preset threshold, the second dosing device 2302 and the third dosing device 2303 are turned off to stop the dosing operation on the drainage pipe 210.

[0056] The third preset threshold value is 8PH-9PH.

[0057] Furthermore, the PH sensor 520 uses the GP-250A sensor, which is a standard technology.

[0058] In one possible implementation, the inlet end of the drainage pipe 210 is equipped with a sensor switch 400; the sensor switch 400 is electrically connected to the central controller 500.

[0059] It should be noted here that, as Figure 1 , Figure 3 , Figure 4 As shown, the central controller 500 can control the opening or closing of the conductivity sensor 510, ORP sensor 220, and pH sensor 520 based on the information transmitted by the inductive switch 400. Specifically, when the central air conditioning starts running, cooling water flows from the supply pipe 130 into the diversion pipe 210, thereby opening the inductive switch 400. At this time, the diversion pipe 210 is open, allowing the cooling water to flow smoothly into it. Simultaneously, the inductive switch 400 transmits the opening information to the central controller 500, which then controls the conductivity sensor 510, ORP sensor 220, and pH sensor 520 to activate the flow of cooling water through the diversion pipe 210. When the central air conditioning system stops running, the induction switch 400 closes the drain pipe 210, making the drain pipe 210 an open circuit. At this time, the central controller 500 does not receive the information transmitted by the induction switch 400, so the central controller 500 controls the conductivity sensor 510, ORP sensor 220 and pH sensor 520 to stop detection. This avoids the ineffective operation of the conductivity sensor 510, ORP sensor 220 and pH sensor 520 when there is no cooling water flow, saves power consumption, extends the service life of the conductivity sensor 510, ORP sensor 220 and pH sensor 520 and reduces operating costs.

[0060] In one possible implementation, such as Figure 3 As shown, the inductive switch 400 includes: a housing 410, a water-stop plate 420, a first sensor 430, and a second sensor 440; the housing 410 has a cavity with openings at both ends, and the two ends of the openings of the housing 410 are installed on the drain pipe 210. A rotating shaft 450 is provided inside the housing 410. One side of the water-stop plate 420 is hinged to the housing 410 through the rotating shaft 450. The second sensor 440 is fixedly installed on the top inside the housing 410 and is electrically connected to the central controller 500. The first sensor 430 is fixedly installed on the water-stop plate 420, which is suitable for the first sensor 430 and the second sensor 440 to come into contact with each other when the cooling water impacts the water-stop plate 420.

[0061] It should be noted that the housing 410 is designed to provide installation space for internal equipment, ensuring the stability of its internal structure and protection from external environmental factors. The interior of the housing 410 is connected to the cavity of the drainage pipe 210. The rotating shaft 450 is fixedly installed inside the housing 410 and located above the water inlet of the housing 410. One side of the water-stop plate 420 is hinged to the rotating shaft 450, and the water-stop plate 420 is located at the water inlet of the housing 410. The first sensor 430 is fixedly installed on the side of the water-stop plate 420 away from the water inlet of the housing 410. Correspondingly, the second sensor 440 is fixedly installed inside the housing 410. The first sensor 430 and the second sensor 440 cooperate to detect the positional change of the water-stop plate 420 and transmit the detected information to the central controller 500.

[0062] When the central air conditioning system is running, cooling water flows into the drain pipe 210 and pushes open the water stop plate 420. At this time, the water stop plate 420 rotates around the pivot 450, thereby opening the drain pipe 210. The rotation of the water stop plate 420 causes the first sensor 430 to move towards the second sensor 440, so that the first sensor 430 and the second sensor 440 come into contact. This causes the two spring contacts in the second sensor 440 to make contact and generate an electrical signal. At this time, the drain pipe 210 is open, and the second sensor 440 transmits the electrical signal from the water stop plate 420 opening the drain pipe 210 to the central controller 500. When the central air conditioning system is running, the cooling water stops flowing. The water stop plate 420, under its own weight, seals the water inlet of the housing 410, preventing the cooling water in the drain pipe 210 from flowing back into the water supply pipe 130. At the same time, since the first sensor 430 and the second sensor 440 are not in contact, the two spring contacts in the second sensor 440 are open. At this time, the drain pipe 210 is open-circuited, and the second sensor 440 does not generate an electrical signal. If the central controller 500 does not receive an electrical signal, the central controller 500 controls the conductivity sensor 510, the ORP sensor 220, and the pH sensor 520 to stop detection.

[0063] In one possible implementation, such as Figure 3 As shown, the inductive switch 400 also includes a limiting part 460; the limiting part 460 is fixedly disposed inside the housing 410, and the limiting part 460 is located in the circumferential direction of the waterstop plate 420 rotating around the rotating shaft 450.

[0064] It should be noted that the main body of the limiting part 460 is a rectangular plate structure. The limiting part 460 is fixedly installed inside the housing 410. The limiting part 460 is used to limit the rotation angle of the water stop plate 420 around the rotating shaft 450, so as to prevent the water stop plate 420 from rotating excessively under the impact force of the cooling water flow, which would cause the first sensor 430 and the second sensor 440 to have a strong hard collision. This reduces the risk of damage to the first sensor 430 and the second sensor 440 and extends the service life of the water flow sensing switch 400.

[0065] Preferably, the rotation angle of the waterstop plate 420 is 85°-95°.

[0066] In one possible implementation, the inductive switch 400 adopts a switch of model YZ-G1-ZH-1 in the prior art.

[0067] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A central air conditioning cooling water treatment system, characterized in that, include: Condenser, cooling tower, water supply pipe, water return pipe, cooling water treatment components and central controller; The outlet of the condenser is connected to the inlet of the cooling tower via the water supply pipe, and the outlet of the cooling tower is connected to the inlet of the condenser via the return pipe. A circulation pump is installed on the water supply pipe. The cooling water treatment assembly is located between the water supply pipe and the return pipe. The cooling water treatment assembly includes: a drain pipe, an ORP sensor, and a dosing device; The inlet end of the drainage pipe is connected to the water supply pipe, and the inlet end of the drainage pipe is located between the inlet end of the water supply pipe and the circulating pump. The outlet end of the drainage pipe is connected to the return water pipe. The ORP sensor and the dosing device are arranged on the drainage pipe and arranged sequentially along the flow direction of the water in the drainage pipe. The detection end of the ORP sensor is inserted into the cavity of the drainage pipe. The central controller is electrically connected to the output end of the ORP sensor. The dosing device includes: a medicine tank, a stirrer, and a dosing pump; the stirrer is fixed to the top of the medicine tank, and the stirring part of the stirrer extends into the cavity of the medicine tank; the dosing pump is fixedly installed on the top of the medicine tank; the inlet of the dosing pump is connected to the cavity of the medicine tank through a first infusion tube; and the outlet of the dosing pump is connected to the drainage tube through a second infusion tube.

2. The central air conditioning cooling water treatment system according to claim 1, characterized in that, The dosing device is provided in three parts, and the three dosing devices are arranged in sequence along the water flow direction in the drainage pipe.

3. The central air conditioning cooling water treatment system according to claim 1, characterized in that, It also includes sewage pipes; The drain pipe is connected to the diversion pipe, and the inlet end of the drain pipe is located between the dosing device and the ORP sensor.

4. The central air conditioning cooling water treatment system according to claim 3, characterized in that, The sewage pipe is equipped with a solenoid valve.

5. The central air conditioning cooling water treatment system according to claim 4, characterized in that, It also includes conductivity sensors; The conductivity sensor is mounted on the drainage tube, with its detection end inserted into the cavity of the drainage tube. The central controller is electrically connected to the output end of the conductivity sensor.

6. The central air conditioning cooling water treatment system according to claim 2, characterized in that, It also includes a pH sensor; The pH sensor is mounted on the drainage tube and is located adjacent to the ORP sensor. The detection end of the pH sensor is inserted into the cavity of the drainage tube. The central controller is electrically connected to the output end of the pH sensor.

7. The central air conditioning cooling water treatment system according to claim 1, characterized in that, The inlet end of the drainage pipe is equipped with a sensor switch; The inductive switch is electrically connected to the central controller.

8. The central air conditioning cooling water treatment system according to claim 7, characterized in that, The inductive switch includes: a housing, a water-stop plate, a first sensor, and a second sensor; The housing has a cavity with openings at both ends. The openings at both ends of the housing are mounted on the drainage pipe. A rotating shaft is provided inside the housing. One side of the waterstop plate is hinged to the housing through the rotating shaft. The second sensor is fixedly installed at the top inside the housing and is electrically connected to the central controller. The first sensor is fixedly installed on the waterstop plate, which is suitable for the first sensor and the second sensor to come into contact with each other when cooling water impacts the waterstop plate.

9. The central air conditioning cooling water treatment system according to claim 8, characterized in that, The inductive switch also includes a limiting part; The limiting part is fixedly installed inside the housing, and the limiting part is located in the circumferential direction of the waterstop plate rotating around the axis.

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