Fresh air handling unit condensate water recovery system

Abstract

This application belongs to the field of environmental protection and energy-saving technology in electronic manufacturing, and relates to a condensate recovery system for fresh air handling units. The condensate recovery system includes a carrying unit, a collection unit, a purification unit, a disinfection unit, a detection unit, and a power transmission unit. Condensate in the collection unit is sequentially transported to the purification unit, disinfection unit, and detection unit via the power transmission unit, achieving the removal of suspended impurities, colloids, and organic pollutants from the condensate, as well as the inactivation of microorganisms and the degradation of organic matter. After the detection unit tests the water quality indicators, compliant condensate is transported to a pure water preparation system, while non-compliant condensate is transported to a cooling tower makeup water system. This application solves the resource waste and environmental problems caused by the direct discharge of traditional condensate, improves the utilization rate of condensate resources, reduces water and sewage costs for enterprises, provides stable water purification effects, and is suitable for continuous condensate treatment scenarios in industrial workshops, demonstrating strong practicality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic manufacturing environmental protection and energy saving, in particular to a fresh air handling unit condensate water recycling system. BACKGROUND

[0002] In the field of electronic manufacturing, especially in integrated circuit production workshops, the temperature and humidity control of the production environment is extremely strict, usually requiring temperature fluctuation control within ±0.5℃ and humidity fluctuation control within ±5%. In order to maintain a stable production environment, the workshop needs to be equipped with a large number of fresh air handling units (MAU) for continuous air supply and dehumidification treatment. The units will produce a large amount of condensate water during operation. Taking a fresh air handling unit with an air volume of 10000m³ / h as an example, the daily condensate water production can reach 5~8 tons, and if it is directly discharged, it will cause significant waste of water resources.

[0003] At the same time, the workshop environment contains trace amounts of acidic volatile organic compounds (VOCs) such as isopropyl alcohol and acetone, which are easy to enter the fresh air handling unit with air and dissolve in the condensate water, making the condensate water contain certain organic pollutants. The traditional treatment method is to directly discharge the condensate water into the sewage pipe network without recycling, which not only increases the water cost of enterprises, but also has potential environmental risks.

[0004] At present, there is a lack of special recycling and purification devices for fresh air handling unit condensate water in the electronic industry, and existing water treatment equipment cannot adapt to the condensate water quality characteristics and flow fluctuation conditions, and cannot realize stable purification and quality recycling. In order to meet the development needs of green manufacturing, water saving and emission reduction in the semiconductor industry, it is urgent to develop an integrated, modular and mobile condensate water recycling and purification system to realize efficient recycling of water resources, reduce enterprise operating costs and improve production environmental protection level. SUMMARY

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide a fresh air handling unit condensate water recycling system, which effectively solves the problems of high organic content, impurity mixing and unstable water quality of condensate water by multi-stage collaborative purification treatment of fresh air handling unit condensate water. By setting a detection unit and a control unit, the recycling path can be automatically divided according to the water quality index. The qualified condensate water can be recycled for pure water preparation, and the unqualified condensate water can be used as cooling tower make-up water, realizing efficient recycling of water resources.

[0006] In one aspect, the present application provides a fresh air handling unit condensate water recycling system, comprising a bearing unit, a collecting unit, a purification unit, a disinfection unit, a detection unit and a power conveying unit;

[0007] The bearing unit is used to bear the collecting unit, the purification unit, the disinfection unit and the power conveying unit;

[0008] The collecting unit is connected with the fresh air handling unit to collect and store the condensed water generated by the fresh air handling unit.

[0009] The purifying unit is connected with the collecting unit to filter and adsorb the condensed water.

[0010] The sterilizing unit is connected with the purifying unit to sterilize and disinfect the condensed water after the filtering and adsorbing treatment, and is connected with the pure water preparation system and the cooling tower water supplement system to recycle the condensed water after the sterilizing and disinfecting treatment.

[0011] The detecting unit comprises a first detecting module connected with the sterilizing unit to detect the water quality of the condensed water after the sterilizing and disinfecting treatment.

[0012] The power conveying unit comprises a first power module connected with the collecting unit and the purifying unit to provide conveying power for the condensed water.

[0013] In an optional embodiment, the fresh air handling unit condensed water recycling system further comprises a control unit connected with the detecting unit and the power conveying unit, the control unit receives the detection signal of the detecting unit to control the power conveying unit.

[0014] In an optional embodiment, the bearing unit comprises a box body and a roller, the roller is arranged at the bottom of the box body to realize the movement of the box body.

[0015] In an optional embodiment, the collecting unit comprises a tank body and a mesh cover, the mesh cover covers the tank body, and the mesh size of the mesh cover is 2-4 mm.

[0016] In an optional embodiment, the purifying unit comprises a coarse filter module, an adsorption module and a fine filter module.

[0017] In an optional embodiment, the coarse filter module filters the condensed water by using quartz sand, the adsorption module adsorbs the condensed water by using activated carbon, and the fine filter module adopts a multi-stage precision filter core with a pore size of 20-5 μm.

[0018] In an optional embodiment, the sterilizing unit comprises an ultraviolet lamp and an ozone generator, the ozone generator is used to generate ozone to oxidize and decompose organic matter in the condensed water.

[0019] In an optional embodiment, the first detecting module is a TOC analyzer to detect the content of total organic carbon in the condensed water.

[0020] In an alternative embodiment, if the first detection module detects that the total organic carbon content in the condensed water is ≥ 500 ppb, the condensed water is recycled to the cooling tower water replenishing system; if the first detection module detects that the total organic carbon content in the condensed water is < 500 ppb, the condensed water is recycled to the pure water preparation system.

[0021] In an alternative embodiment, the detection unit further comprises a second detection module, a third detection module and a fourth detection module.

[0022] The second detection module is arranged in the collection unit to detect the liquid level of the condensed water in the collection unit.

[0023] The third detection module is arranged between the collection unit and the purification unit to detect the turbidity of the condensed water.

[0024] The fourth detection module is connected with the purification unit to detect the pressure difference between the water inlet and the water outlet of the purification unit.

[0025] As described above, compared with the prior art, the fresh air handling unit condensed water recycling system provided by the present application has at least the following beneficial effects:

[0026] The fresh air handling unit condensed water recycling system provided by the present application effectively solves the problems of high organic matter content, impurity mixing and unstable water quality of the condensed water by performing multi-stage collaborative purification treatment on the fresh air handling unit condensed water. By arranging the detection unit and the control unit, the recycling path can be automatically divided according to the water quality index. The qualified condensed water can be recycled for pure water preparation, and the unqualified condensed water can be used as cooling tower water replenishment, thereby realizing high-efficiency recycling of water resources according to quality. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0028] Figure 1 The structure schematic diagram of the fresh air handling unit condensed water recycling system provided by the present application is shown.

[0029] In the figure: 1, bearing unit; 11, box body; 12, roller; 2, collection unit; 21, tank body; 22, mesh cover; 3, purification unit; 4, disinfection unit; 51, first detection module; 61, first power module; 02, fresh air handling unit; 03, cooling tower water replenishing system; 04, pure water preparation system. DETAILED DESCRIPTION

[0030] In order to make the technical purposes, technical solutions and technical effects of the present application clearer, the technical solutions in the present application will be described clearly and completely below in conjunction with embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0031] Therefore, the detailed description of the embodiments of the present application below is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art without making creative efforts based on the embodiments in the present application belong to the scope of protection of the present application. In addition, the terms “first”, “second” are only for description purposes, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms “center”, “longitudinal”, “lateral”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer” and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0033] In the description of the present application, unless otherwise explicitly specified and limited, the terms “mounting”, “connection”, “connecting” should be understood broadly, for example, can be fixed connection, or can be detachable connection. In addition, the description referring to the terms “one embodiment”, “some embodiments”, “illustrative embodiment”, “example”, “specific example” or “some examples” means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0034] In view of the problems of waste of condensate water resources and environmental pollution in the prior art described above, a fresh air handling unit condensate water recovery system is provided, which effectively solves the problems of high organic matter content, impurity mixing and unstable water quality of condensate water by multi-stage collaborative purification treatment and quality-based recycling of fresh air handling unit condensate water, and realizes high-efficiency recycling of water resources.

[0035] Reference Figure 1The fresh air handling unit condensate water recycling system provided by the embodiment comprises a bearing unit 1, a collection unit 2, a purification unit 3, a disinfection unit 4, a detection unit 5 and a power delivery unit 6.

[0036] The bearing unit 1 is used to bear the collection unit 2, the purification unit 3, the disinfection unit 4 and the power delivery unit 6.

[0037] The collection unit 2 is connected with the fresh air handling unit 02 to collect and store the condensate water generated by the fresh air handling unit 02.

[0038] The purification unit 3 is connected with the collection unit 2 to filter and adsorb the condensate water.

[0039] The disinfection unit 4 is connected with the purification unit 3 to sterilize and disinfect the condensate water after the filtering and adsorption treatment, and is connected with the pure water preparation system 04 and the cooling tower water replenishing system 03 to recycle the condensate water after the sterilization and disinfection treatment.

[0040] The detection unit 5 comprises a first detection module 51 connected with the disinfection unit 4 to detect the water quality of the condensate water after the sterilization and disinfection treatment.

[0041] The power delivery unit 6 comprises a first power module 61 connected with the collection unit 2 and the purification unit 3 and providing delivery power for the condensate water.

[0042] In actual application, the condensate water in the collection unit 2 is sequentially delivered to the purification unit 3, the disinfection unit 4 and the detection unit 5 through the power delivery unit 6, so as to remove the suspended impurities, colloids and organic pollutants in the condensate water, inactivate microorganisms and degrade organic matter, and after detecting the water quality indexes through the detection unit 5, the condensate water meeting the standards is delivered to the pure water preparation system 04 and the condensate water not meeting the standards is delivered to the cooling tower water replenishing system 03, so as to effectively solve the resource waste and environmental protection problems caused by the direct discharge of the traditional condensate water and improve the condensate water resource utilization rate.

[0043] In the embodiment, the bearing unit 1 comprises a box body 11 and a roller 12, the box body 11 is designed as a rectangular parallelepiped structure with an open top and is used to place the structural components such as the collection unit 2, the purification unit 3, the disinfection unit 4 and the power delivery unit 6. During the design process, the shape, size, material and other parameters of the box body 11 can be selected according to the actual situation, which is not specifically limited here, for example, in the embodiment, stainless steel material is used to ensure the stability of the box body 11.

[0044] The rolling wheels 12 are arranged at the bottom of the box body 11 to realize the movement of the box body 11. The rolling wheels 12 can be one or a combination of fixed rolling wheels 12, universal rolling wheels 12, brake rolling wheels 12 or other suitable rolling wheels 12, and can be made of nylon, rubber, polyurethane or other suitable materials to facilitate the flexible movement and positioning of the entire device. Specifically, the type, number, size, material and other parameters of the rolling wheels 12 can be selected according to the actual situation, which is not specifically limited here.

[0045] In the present embodiment, the collecting unit 2 comprises a tank 21 and a mesh cover 22. The tank 21 can be cylindrical, cubic, cuboid or other suitable shapes, preferably designed as a cylinder, which is uniform in stress and good in pressure resistance. The material of the tank 21 can be selected from any one of stainless steel, PP plastic or other suitable materials to realize the functions of collecting and long-term storing of condensed water.

[0046] The tank 21 in the present embodiment is designed with an open top and is in an open environment, so the mesh cover 22 is arranged to cover the open top of the tank 21 to prevent foreign matters in the environment from falling into the tank 21 and to avoid contamination of the condensed water. The material of the mesh cover 22 can be any one of stainless steel, nylon, PP plastic or other suitable materials, preferably stainless steel, which has the advantages of rust resistance, high strength and less deformation. The mesh size of the mesh cover 22 can be 2-4 mm, specifically 2 mm, 3 mm, 3.5 mm, 4 mm or other suitable sizes, preferably 3 mm to prevent foreign matters larger than 3 mm from falling into the tank 21.

[0047] In the present embodiment, the purification unit 3 comprises a rough filtration module, an adsorption module and a fine filtration module. The rough filtration module can use one or a combination of quartz sand, anthracite filter material, manganese sand filter material or other suitable filter materials to realize the primary rough filtration of the condensed water, preferably using quartz sand to filter the condensed water, which has high mechanical strength, wear resistance and pressure resistance, is not easy to break and powder under long-term water flow, has long service life and is not easy to cause secondary pollution, and is resistant to acid and alkali and corrosion, does not react with trace organic matter and VOC in the condensed water, and does not dissolve harmful substances, which can ensure water quality safety.

[0048] The adsorption module can use one or a combination of activated carbon, zeolite, diatomite or other suitable materials to effectively adsorb organic pollutants, odors and colloidal impurities in water, preferably using activated carbon as the adsorption material, which has strong adsorption capacity and can efficiently adsorb organic pollutants, VOC, odors, pigments and colloidal substances in water, effectively reducing the TOC value of the condensed water, and the operation of loading and replacing the activated carbon is simple, the equipment maintenance is simple, and the long-term operation is economical.

[0049] The fine filter module can adopt any one of a PP melt-blown precision filter, a folded microporous filter, a multi-stage filter cartridge combined filter device, or other suitable fine filter devices. Preferably, the fine filter module adopts a multi-stage filter cartridge combined filter device, and different pore sizes before and after the filter cartridge are designed. In this embodiment, the filter cartridge of the fine filter module has a filtration pore size gradually reduced from 20 μm to 5 μm along the water flow direction. For example, a three-stage gradient filtration of 20 μm, 10 μm, and 5 μm can be designed to realize step-by-step deep filtration from coarse to fine, make up for the defects of insufficient single filtration precision, greatly improve the cleanliness of the condensed water, and achieve a suspended solid removal rate of more than 99.5%, while ensuring stable operation of subsequent sterilization, water quality detection, and quality-based recycling.

[0050] In this embodiment, the disinfection unit 4 can be one or a combination of ultraviolet sterilization devices, ozone generators, sodium hypochlorite disinfection devices, plasma sterilization devices, or other suitable sterilization and disinfection devices. Preferably, the disinfection unit 4 adopts a combination device of ultraviolet lamps and ozone generators. The ozone has strong oxidizing properties and can kill bacteria, viruses, and fungi, and can also oxidize and decompose residual organic matter, pigments, and odors in water to reduce TOC. The ultraviolet light can be 200-280 nm UVC short-wave ultraviolet light. Specifically, the wavelength of the ultraviolet light can be 200 nm, 223 nm, 258 nm, 269 nm, 280 nm, or other suitable wavelengths. Preferably, the wavelength of the ultraviolet light is 254 nm. The 254 nm wavelength ultraviolet light can accurately destroy the nucleic acid structure of bacteria and viruses, is the peak absorption interval of microorganisms, has strong inactivation ability and stable sterilization effect, and the ultraviolet light and ozone work together to avoid the limitations of single disinfection methods.

[0051] In this embodiment, the power delivery unit 6 includes a first power module 61 connected to the collection unit 2 and the purification unit 3 and providing delivery power to the condensed water. The first power module 61 can be any one of a water pump, a diaphragm pump, a screw pump, or other suitable power delivery units 6 to sequentially deliver the condensed water from the collection unit 2 to the purification unit 3, the disinfection unit 4, the first detection module 51, and the return pipeline.

[0052] In an optional embodiment, the power delivery unit 6 further includes a second power module connected to the disinfection unit 4 and connected to the pure water preparation system 04 and the cooling tower water supply system 03. The second power module can be any one of a water pump, a diaphragm pump, a screw pump, or other suitable power delivery units 6 to provide delivery power to the condensed water after sterilization and disinfection treatment and promote the quality-based recycling of the condensed water.

[0053] The first power module 61 of the power delivery unit 6 in the embodiment is only provided for energy saving consideration. In actual application, the type, position and other parameters of the power delivery unit 6 can be specifically set according to actual needs, which are not limited here.

[0054] In the embodiment, the detection unit 5 includes a first detection module 51, a second detection module, a third detection module and a fourth detection module. The first detection module 51 is connected with the sterilization unit 4 to detect the water quality of the condensed water after sterilization and disinfection treatment. The first detection module 51 can be one or a combination of a TOC analyzer, a turbidimeter, a pH meter, a conductivity detector or other suitable water quality detection equipment, to detect the water quality of the condensed water after sterilization and disinfection treatment, and realize the recycling of the condensed water according to the detection data. Preferably, the first detection module 51 is a TOC analyzer, which is used to detect the total organic carbon content in the condensed water in real time, to judge the degree of organic pollution.

[0055] In the embodiment, when the first detection module 51 detects that the total organic carbon content in the condensed water is ≥500ppb, the condensed water after purification and sterilization and disinfection treatment is recycled to the cooling tower water supply system 03; if the first detection module 51 detects that the total organic carbon content in the condensed water is <500ppb, the condensed water after purification and sterilization and disinfection treatment is recycled to the pure water preparation system 04.

[0056] In the embodiment, the second detection module is arranged in the collection unit 2 to detect the liquid level height of the condensed water in the collection unit 2. The second detection module can be one or a combination of a float ball liquid level switch, an electrode type liquid level sensor, an ultrasonic liquid level meter or other suitable liquid level detection device. Preferably, the second detection module is an electrode type liquid level sensor, which detects the liquid level by the principle of condensed water conduction. In the embodiment, three electrode type liquid level sensors are arranged to detect high, medium and low liquid levels respectively, to monitor the liquid level height of the condensed water in the tank 21 in real time, and to trigger an alarm feedback when the liquid level is too high. This design can realize real-time feedback of high, medium and low liquid levels, to facilitate the linkage control of water inlet, start and stop of delivery and the back-end purification and disinfection equipment, to prevent water overflow or water shortage idling of the tank 21, and to improve the system operation stability and automation level.

[0057] In the embodiment, the third detection module is arranged between the collection unit 2 and the purification unit 3 to detect the turbidity of the condensed water. The third detection module can be a turbidimeter, a photoelectric suspended matter detector or other suitable turbidity detection device. Preferably, the third detection module is a turbidimeter, which monitors the turbidity of the condensed water in real time, accurately identifies the content of suspended impurities and particles in the water, and accurately controls the working strength of the purification unit 3 according to the detection signal, to reduce unnecessary energy consumption.

[0058] In the embodiment, the fourth detection module is connected with the purification unit 3, and is used for detecting the pressure difference between the water inlet and the water outlet of the purification unit 3. The fourth detection module can be a pressure sensor, a differential pressure transmitter, a pressure gauge set, a differential pressure switch or other suitable device for detecting the pressure difference, and can provide a basis for cleaning and replacement by feeding back the plugging degree of the filter element in real time.

[0059] It should be noted that when the fourth detection module detects an abnormal pressure difference and the filter element is blocked, the technician can control the recovery system to be suspended, switch the water flow path by using the pipeline reversing valve, and provide conveying power by using the first power module 61, so that the water flow reverses through the inside of the purification unit 3 to complete the reverse flushing of the filter material and the filter element. During the backwashing operation, it should be noted that the water level of the tank 21 is in the middle for the best, so as to prevent the condensate water in the tank 21 from continuously collecting and overflowing during the backwashing operation.

[0060] In the embodiment, the fresh air handling unit condensate water recovery system further comprises a control unit connected with the detection unit 5 and the power conveying unit 6. The control unit receives the detection signal of the detection unit 5 to control the power of the power conveying unit 6. According to the water quality detection result of the first detection module 51, the control unit can judge the threshold condition and automatically control the pipeline valve of the condensate water recovery pipeline. For example, when the first detection module 51 detects that the total organic carbon content in the condensate water is greater than or equal to 500 ppb, the control unit controls the pipeline valve connected with the cooling tower water supply system 03 to be opened, so that the condensate water treated by purification and disinfection is returned to the cooling tower water supply system 03. When the first detection module 51 detects that the total organic carbon content in the condensate water is less than 500 ppb, the control unit controls the pipeline valve connected with the pure water preparation system 04 to be opened, so that the condensate water treated by purification and disinfection is returned to the pure water preparation system 04.

[0061] When the second detection module detects that the water level in the collection unit 2 is low, the control unit controls the first power module 61 to reduce the acting power. When the third detection module detects that the turbidity of the condensate water is low, the control unit controls the purification unit 3 to reduce the working strength, so as to achieve the energy saving effect.

[0062] The above only describes some preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A fresh air handling unit condensate recovery system, characterized by, The system comprises a bearing unit, a collecting unit, a purifying unit, a sterilizing unit, a detecting unit and a power conveying unit. The bearing unit is used for bearing the collecting unit, the purifying unit, the sterilizing unit and the power conveying unit. The collecting unit is connected with the fresh air handling unit to collect and store the condensed water generated by the fresh air handling unit. The purifying unit is connected with the collecting unit to filter and adsorb the condensed water. The sterilizing unit is connected with the purifying unit to sterilize and disinfect the condensed water after the filtering and adsorbing treatment. The sterilizing unit is connected with the pure water preparation system and the cooling tower water supplement system to recycle the condensed water after the sterilization and disinfection treatment. The detecting unit comprises a first detecting module connected with the sterilizing unit to detect the water quality of the condensed water after the sterilization and disinfection treatment. The power conveying unit comprises a first power module connected with the collecting unit and the purifying unit to provide conveying power for the condensed water.

2. The fresh air handling unit condensate recovery system of claim 1, wherein, The fresh air handling unit condensed water recycling system further comprises a control unit connected with the detecting unit and the power conveying unit, which receives the detection signal of the detecting unit to control the power conveying unit.

3. The fresh air handling unit condensate recovery system of claim 1, wherein, The bearing unit comprises a box body and a roller arranged at the bottom of the box body to realize the movement of the box body.

4. The fresh air handling unit condensate recovery system of claim 1, wherein, The collecting unit comprises a tank body and a mesh cover covering the tank body, and the mesh size of the mesh cover is 2-4 mm.

5. The fresh air handling unit condensate recovery system of claim 1, wherein, The purifying unit comprises a coarse filter module, an adsorption module and a fine filter module.

6. The fresh air handling unit condensate recovery system of claim 5, wherein, The coarse filter module filters the condensed water by using quartz sand, the adsorption module adsorbs the condensed water by using activated carbon, and the fine filter module adopts a multi-stage precision filter core with a pore size of 20-5 μm.

7. The fresh air handling unit condensate recovery system of claim 1, wherein, The sterilizing unit comprises an ultraviolet lamp and an ozone generator for generating ozone to oxidize and decompose organic matter in the condensed water.

8. The fresh air handling unit condensate recovery system of claim 1, wherein, The first detecting module is a TOC analyzer for detecting the content of total organic carbon in the condensed water.

9. The fresh air handling unit condensate recovery system of claim 8, wherein, If the first detecting module detects that the content of total organic carbon in the condensed water is ≥500 ppb, the condensed water is recycled to the cooling tower water supplement system; if the first detecting module detects that the content of total organic carbon in the condensed water is <500 ppb, the condensed water is recycled to the pure water preparation system.

10. The fresh air handling unit condensate recovery system of claim 1, wherein, The detecting unit further comprises a second detecting module, a third detecting module and a fourth detecting module. The second detecting module is arranged in the collecting unit to detect the liquid level height of the condensed water in the collecting unit. The third detecting module is arranged between the collecting unit and the purifying unit to detect the turbidity of the condensed water. The fourth detecting module is connected with the purifying unit to detect the pressure difference between the water inlet and the water outlet of the purifying unit.

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