CN106994266B - Central air conditioner filtering system and filtering method thereof - Google Patents
Central air conditioner filtering system and filtering method thereof Download PDFInfo
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- CN106994266B CN106994266B CN201610053644.6A CN201610053644A CN106994266B CN 106994266 B CN106994266 B CN 106994266B CN 201610053644 A CN201610053644 A CN 201610053644A CN 106994266 B CN106994266 B CN 106994266B
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- electric valve
- singlechip
- central air
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- 238000001914 filtration Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 136
- 238000011010 flushing procedure Methods 0.000 claims abstract description 14
- 239000012535 impurity Substances 0.000 claims description 13
- 238000004378 air conditioning Methods 0.000 claims description 9
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 230000008054 signal transmission Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004140 cleaning Methods 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 description 13
- 238000005260 corrosion Methods 0.000 description 13
- 244000005700 microbiome Species 0.000 description 7
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 6
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 241000195493 Cryptophyta Species 0.000 description 2
- 238000009395 breeding Methods 0.000 description 2
- 230000001488 breeding effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000008234 soft water Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 241000295146 Gallionellaceae Species 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 231100001010 corrosive Toxicity 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 235000013980 iron oxide Nutrition 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 210000003097 mucus Anatomy 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
- B01D29/52—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
- B01D35/143—Filter condition indicators
- B01D35/1435—Filter condition indicators with alarm means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
- B01D35/147—Bypass or safety valves
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention relates to the technical field of cleaning devices. The invention provides a central air conditioner filtering system, which comprises a circulating water pipeline and an electric cabinet for controlling the circulating water pipeline to run according to a set sequence, wherein at least one group of filtering devices connected in parallel and a water draining pipeline controlled by a fourth electric valve are arranged between a water inlet pipe and a water return pipe, each group of filtering devices comprises a first electric valve arranged at the water inlet end of a filter and a second electric valve arranged at the water outlet end of the filter, a pressure gauge and a pressure sensor are arranged on the filter, a water flow sensor is arranged between the filter and the second electric valve, a water draining pipe is arranged between the filter and the first electric valve, a third electric valve is arranged on the water draining pipe, and a filter screen is arranged in the filter. The central air conditioner filtering system and the filtering method provided by the invention can be used for carrying out repeated circulating filtration and back flushing, so that the running cost of the central air conditioner is reduced, the energy-saving and environment-friendly effects are achieved, and the economic and social benefits are achieved.
Description
Technical Field
The invention relates to the technical field of central cleaning devices, in particular to a central air conditioner filtering system and a filtering method thereof.
Background
At present, in a circulating water system of a central air conditioner, poor consequences such as system scaling, corrosion, biological slime, bacteria and algae breeding and the like are easily caused due to unstable water quality. In the running circulation process of the central air-conditioning circulating water, the concentration of various salts is correspondingly increased, and when the concentration of Cl and SO4 ions is higher, the corrosion resistance of the metal surface protection film is reduced. Particularly, the Cl has small ionic radius and strong penetrability, and is easy to destroy a protective film on the surface of the metal to increase the anode process speed of corrosion reaction, thereby causing local corrosion of the metal. Bacterial corrosion, such as sulfate reducing bacteria, iron bacteria, etc., can also occur from the growth of microorganisms in water.
In the circulating cooling water system of the central air conditioner, the concentration of dissolved bicarbonate is increased along with evaporation and concentration, when the concentration reaches a saturated state or the water temperature is increased through the heat transfer surface of a heat exchanger, the dissolution balance of salt in water is destroyed, the following reaction, namely the generation of scale, can occur, the heat conduction performance is poor, and the heat exchange efficiency is seriously affected. The main materials of the central air-conditioning water system equipment and the pipelines are carbon steel, and corrosion products of the central air-conditioning water system equipment and the pipelines are mainly hydroxides and hydrates of iron oxides, are in colloid states and stably suspended in water, but are easy to mutually agglomerate and precipitate on heating surfaces when passing through a heat exchanger. The precipitated Fe2O3 has no protection effect on metal due to the discontinuity and the non-compactness of the Fe2O3, and has strong adhesion and great specific gravity due to the magnetism of the Fe2O3, so that the Fe2O3 is difficult to eliminate and forms dirt. Microorganisms can be classified into bacteria, fungi and algae, and the temperature, salt, pH value, dissolved oxygen and the like of the circulating water of the central air conditioner are suitable for the propagation of the microorganisms because the microorganisms are scattered at all corners of the nature. If the water is not effectively controlled, microorganisms are continuously bred and secrete a large amount of mucus, insoluble impurities in the water are bonded together, slime is generated to be attached to the inner surfaces of equipment and pipelines, the flow of the water and the heat exchange of a system are blocked, and sediment corrosion is often caused at a slime deposition place. The scale, corrosion and microorganism breeding are not isolated, but are related and affected, for example, the scale and the dirt are often combined together, and the scale and the biological slime can cause or aggravate the corrosion. These scales, corrosives and biological slime bring serious harm to the safe operation of the central air conditioner. Equipment pipe scale attachment: the heat conductivity coefficient of the scale is extremely low, the heat transfer efficiency is reduced or the heat transfer is uneven, the refrigerating effect of the central air conditioner is affected, the pressure of the condenser is increased, the pressure difference between the front side and the back side of the compressor is increased, the load of the motor is increased, high-pressure operation is caused, the electric energy consumption is increased, and the host high-pressure accident shutdown can be directly caused when serious. The water circulation amount of the system is reduced: deposits such as scale and microbial slime are covered on the surfaces of pipelines of water systems of central air conditioners or flow channels of heat exchangers, seriously block the pipelines and obstruct water flow, so that the circulation amount of chilled water is reduced, and the heat exchange efficiency is further reduced. Rust slag often falls off due to corrosion on the inner walls of the system pipelines and the equipment, the fallen rust slag can block the coil pipe, so that the heat exchange effect of the air conditioner is reduced, and serious shutdown accidents such as perforation leakage and the like are caused; the existence of corrosion also greatly shortens the service life of the equipment. In order to prevent scale formation, control corrosion of equipment and pipelines, improve heat exchange efficiency, save energy and prolong the service life of the equipment, the circulating water system of the central air conditioner is required to be treated and daily water quality stabilization is required to be treated so as to reduce corrosion of the equipment and the pipelines, control scaling generation, inhibit microorganism reproduction and ensure normal and safe operation of the system.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and the circulating water filtering device is arranged in the central air conditioner filtering system and the filtering method thereof, so that not only can soft water circulated in an air conditioner be effectively filtered, but also the soft water can be recycled for achieving the purpose of saving energy, the working efficiency is effectively improved, and the filtering device is replaced and maintained under the condition that normal use and safe operation are not affected.
In order to achieve the above purpose, the technical scheme adopted by the invention is that the central air conditioner filtering system comprises a circulating water pipeline and an electric cabinet, wherein the circulating water pipeline is connected with a water inlet pipe and a water return pipe, the electric cabinet is used for controlling the circulating water pipeline to run according to a set sequence, at least one group of filtering devices connected in parallel and a water draining pipeline controlled by a fourth electric valve are arranged between the water inlet pipe and the water return pipe, each group of filtering devices comprises a first electric valve arranged at the water inlet end of a filter and a second electric valve arranged at the water outlet end of the filter, a pressure gauge and a pressure sensor are arranged on the filter, a water flow sensor is arranged between the filter and the second electric valve, a water draining pipe is arranged between the filter and the first electric valve, a third electric valve is arranged on the water draining pipe, and a filter screen is arranged in the filter.
Further, the electric cabinet is including setting up at inside singlechip and setting up at outside and singlechip carry out signal transmission's display screen, switch and a plurality of warning light, the singlechip is connected with first motorised valve, second motorised valve, third motorised valve, pressure sensor and water flow sensor respectively.
Further, the direction that the filter screen set up is equipped with the contained angle with filtering the rivers direction, the angle of contained angle is more than 0 and below 90.
Further, the included angle is 30 °, 45 ° or 90 °.
Further, the specification of the filter screen is 70-100 meshes.
Further, the filter devices are in 4 groups.
The invention also provides a filtering method using the central air conditioner filtering system, which comprises the following steps:
step 1, equally dividing the diameter of a water inlet pipe into n parts to obtain the pipeline diameter value of each group of filtering devices and the group number of the filtering devices which are n groups and are connected in parallel;
Step 2, opening a switch of a control box, simultaneously opening a first electric valve and a second electric valve of each group of filter devices by a singlechip in the control box, closing a third electric valve to carry out positive circulation filtration on circulating water provided by a central air-conditioning water supply system, and starting a water flow sensor, a pressure sensor and a pressure gauge by the singlechip;
Step 3, when impurities in the circulating water are blocked by a filter screen in the filter, a water flow sensor and a pressure sensor at the water outlet end of the filter respectively transmit the numerical changes of water flow and water pressure to a singlechip, the singlechip analyzes the numerical changes, and when the numerical changes reach the highest value of the preset numerical changes, the singlechip starts a warning lamp and a display screen to display and warn;
step 4, after verifying the numerical values of the warning lamp and the display screen, an operator starts a back flushing command to perform a back flushing step;
Step 5, the singlechip closes the first electric valve according to a back flushing command, then opens the third electric valve, and the circulating water with pressure washes impurities on the filter screen, and the washed impurities are discharged from the drain pipe;
Step 6, the water flow sensor and the pressure sensor transmit the water flow and water pressure numerical value changes to the singlechip again respectively, the singlechip analyzes the numerical value changes, and when the numerical value changes reach the preset minimum value, the singlechip opens the first electric valve, then closes the third electric valve, and continues to filter;
Step 7, when the water flow and water pressure numerical value changes of each set of the water flow sensor and the pressure sensor are abnormal, the singlechip chip analyzes the numerical value changes, and when the preset dangerous numerical value changes are reached, the singlechip chip starts a warning lamp and a display screen to display and warn, and simultaneously, the singlechip chip controls to open a fourth electric valve to carry out safety protection backflow;
And 8, repeating the steps 2 to 7 for a plurality of times, and filtering the circulating water of the central air conditioner continuously.
The invention has the advantages and beneficial effects that: the central air conditioner filtering system and the filtering method provided by the invention can perform repeated circulating filtration and back flushing, thereby not only reducing the running cost of the central air conditioner, but also playing an energy-saving and environment-friendly role, and having economic and social benefits.
Drawings
Fig. 1 is a schematic structural diagram of a central air conditioning filter system according to the present invention.
In the figure: 1. a water inlet pipe; 2. a filter; 3. a first electrically operated valve; 4. a display screen; 5. an electric control box; 6. a switch; 7. a warning light; 8. a fourth electrically operated valve; 9. a drain pipe; 10. a second electrically operated valve; 11. a water return pipe; 12. a water flow sensor; 13. a third electrically operated valve; 14. a pressure gauge; 15. a pressure sensor; 16. and a water outlet.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
Example 1
As shown in fig. 1, the present invention provides a central air conditioner filtering system, comprising a circulating water pipeline connected by a water inlet pipe 1 and a water return pipe 11 and an electric cabinet 5 controlling the circulating water pipeline to operate according to a set sequence, wherein the water inlet pipe 1 and a water outlet 16 are connected with the circulating water pipeline of the central air conditioner. The filter device comprises a filter device, wherein at least one group of filter devices and a water drain pipeline are arranged between the water inlet pipe 1 and the water return pipe 11, the filter device is connected in parallel, the water drain pipeline is controlled by a fourth electric valve 8, each group of filter devices comprises a first electric valve 3 arranged at the water inlet end of the filter 2 and a second electric valve 10 arranged at the water outlet end of the filter 2, a pressure gauge 14 and a pressure sensor 15 are arranged on the filter 2, a water flow sensor 12 is arranged between the filter 2 and the second electric valve 10, a drain pipe 9 is arranged between the filter 2 and the first electric valve 3, a third electric valve 13 is arranged on the drain pipe 9, and a filter screen is arranged in the filter 2. The electric cabinet 5 comprises an internal single chip microcomputer, a display screen 4, a switch 6 and a plurality of warning lamps 7, wherein the display screen 4, the switch 6 and the warning lamps 7 are arranged outside and used for carrying out signal transmission with the single chip microcomputer, and the single chip microcomputer is respectively connected with the first electric valve 3, the second electric valve 10, the third electric valve 13, the pressure sensor 15 and the water flow sensor 12. The direction in which the filter screen is arranged and the direction of the filtered water flow are provided with included angles, the included angles are more than 0 degrees and less than 90 degrees, and preferably, the included angles are 30 degrees, 45 degrees or 90 degrees. In this embodiment, the specification of the filter screen is 70-100 mesh.
The invention also provides a filtering method of the central air conditioner filtering system, which comprises the following steps:
step 1, equally dividing the diameter of a water inlet pipe 1 into n parts to obtain the pipeline diameter value of each group of filtering devices and the group number of the filtering devices which are n groups and are connected in parallel; in this embodiment, the diameters of the water inlet pipe 1 and the water return pipe 11 are 200mm, the pipe diameter of each group of the filter devices is 50mm, and 4 groups of the filter devices are provided, namely, n is 4. In the embodiment, an included angle of 90 degrees or 45 degrees is formed between the direction in which the filter screen is arranged and the direction of the filtered water flow;
step 2, opening a switch 6 of a control box 5, simultaneously opening a first electric valve 3 and a second electric valve 10 of each group of filtering devices by a singlechip in the control box 5, closing a third electric valve 13 to perform positive circulation filtering on circulating water provided by a central air-conditioning water supply system, and starting a water flow sensor 12, a pressure sensor 15 and a pressure gauge 14 by the singlechip;
And 3, when the impurities in the circulating water are blocked by the filter screen in the filter 2, the impurities in the circulating water of the central air conditioner are mainly ferric oxide, wherein the ferric oxide is used as a main component. The water flow sensor 12 and the pressure sensor 15 at the water outlet end of the filter 2 respectively transmit the numerical changes of the water flow and the water pressure to the singlechip, the singlechip analyzes the numerical changes, and when the numerical changes reach the highest value of the preset numerical changes, the singlechip starts the warning lamp 7 and the display screen 4 to display and warn;
Step 4, after verifying the numerical values of the warning lamp 7 and the display screen 4, an operator starts a back flushing command to perform a back flushing step;
step 5, the singlechip closes the first electric valve 3 according to a back flushing command, then opens the third electric valve 13, and the circulating water with pressure washes impurities on the filter screen, and the washed impurities are discharged from the drain pipe 9;
Step 6, the water flow sensor 12 and the pressure sensor 15 transmit the water flow and the water pressure numerical value change to the singlechip respectively again, the singlechip analyzes the numerical value change, and when the preset minimum value of the numerical value change is reached, the singlechip opens the first electric valve 3, then closes the third electric valve 13 and continues to filter;
Step 7, when the water flow and water pressure numerical value changes of each set of the water flow sensor 12 and the pressure sensor 15 are abnormal, the singlechip chip analyzes the numerical value changes, and when the preset dangerous numerical value changes are reached, the singlechip chip starts the warning lamp 7 and the display screen 4 to display and warn, and simultaneously, the singlechip chip controls the fourth electric valve 8 to be opened for safety protection backflow;
and 8, repeating the steps 2 to 6 for a plurality of times, and filtering the central air-conditioning circulating water continuously.
The central air conditioner filtering system and the filtering method provided by the invention can perform repeated circulating filtration and back flushing, thereby not only reducing the running cost of the central air conditioner, but also playing an energy-saving and environment-friendly role, and having economic and social benefits.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (2)
1. The central air conditioner filtering system comprises a circulating water pipeline and an electric control box (5), wherein the circulating water pipeline is connected with a water inlet pipe (1) and a water return pipe (11), and the electric control box is used for controlling the circulating water pipeline to run according to a set sequence, and the central air conditioner filtering system is characterized in that the electric control box (5) comprises a singlechip arranged inside, a display screen (4), a switch (6) and a plurality of warning lamps (7), wherein the display screen is arranged outside and is used for carrying out signal transmission with the singlechip, and the singlechip is respectively connected with a first electric valve (3), a second electric valve (10), a third electric valve (13), a pressure sensor (15) and a water flow sensor (12);
The filter comprises a water inlet pipe (1) and a water return pipe (11), at least one group of filtering devices and a water discharge pipeline are arranged between the water inlet pipe (1) and the water return pipe (11), the filtering devices are 4 groups, each group of filtering devices comprises a first electric valve (3) arranged at the water inlet end of the filter (2) and a second electric valve (10) arranged at the water outlet end of the filter (2), a pressure gauge (14) and a pressure sensor (15) are arranged on the filter (2), a water flow sensor (12) is arranged between the filter (2) and the second electric valve (10), a water discharge pipe (9) is arranged between the filter (2) and the first electric valve (3), a third electric valve (13) is arranged on the water discharge pipe (9), a filter screen is arranged in the filter (2), and the specification of the filter screen is 70-100 meshes;
Wherein, the process of flushing the filter is as follows: the singlechip closes the first electric valve (3) according to a back flushing command, then opens the third electric valve (13), and the circulating water with pressure washes impurities on the filter screen, and the washed impurities are discharged from the drain pipe (9);
The direction that the filter screen set up is equipped with the contained angle with the filtration rivers direction, the angle of contained angle is 30, 45 or 90.
2. A filtration method using the central air conditioning filtration system of claim 1, characterized in that the filtration method comprises the steps of:
Step 1, equally dividing the diameter of a water inlet pipe (1) into n parts to obtain the pipeline diameter value of each group of filtering devices and the group number of the filtering devices which are n groups and are connected in parallel;
step 2, opening a switch (6) of a control box (5), simultaneously opening a first electric valve (3) and a second electric valve (10) of each group of filter devices by a singlechip in the control box (5), closing a third electric valve (13) to perform positive circulation filtration on circulating water provided by a central air-conditioning water supply system, and starting a water flow sensor (12), a pressure sensor (15) and a pressure gauge (14) by the singlechip;
Step 3, when impurities in circulating water are blocked by a filter screen in the filter (2), a water flow sensor (12) and a pressure sensor (15) at the water outlet end of the filter (2) respectively transmit water flow and water pressure numerical changes to a singlechip, the singlechip analyzes the numerical changes, and when the numerical changes reach the preset highest value, the singlechip starts a warning lamp (7) and a display screen (4) to display and warn;
Step 4, after verifying the numerical values of the warning lamp (7) and the display screen (4), an operator starts a back flushing command to perform a back flushing step;
Step 5, the singlechip closes the first electric valve (3) according to a back flushing command, then opens the third electric valve (13), and the circulating water with pressure washes impurities on the filter screen, and the washed impurities are discharged from the drain pipe (9);
Step 6, the water flow sensor (12) and the pressure sensor (15) respectively transmit the water flow and the water pressure numerical value change to the singlechip again, the singlechip analyzes the numerical value change, and when the preset minimum value of the numerical value change is reached, the singlechip opens the first electric valve (3), then closes the third electric valve (13) and continues to filter;
Step 7, when the water flow and water pressure value changes of each set of water flow sensor (12) and pressure sensor (15) are abnormal, the singlechip chip analyzes the digital change, and when the preset dangerous value change is reached, the singlechip chip starts the warning lamp (7) and the display screen (4) to display and warn, and simultaneously, the singlechip chip controls the fourth electric valve (8) to be opened for safety protection backflow;
And 8, repeating the steps 2 to 7 for a plurality of times, and filtering the circulating water of the central air conditioner continuously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610053644.6A CN106994266B (en) | 2016-01-26 | 2016-01-26 | Central air conditioner filtering system and filtering method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610053644.6A CN106994266B (en) | 2016-01-26 | 2016-01-26 | Central air conditioner filtering system and filtering method thereof |
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| CN106994266A CN106994266A (en) | 2017-08-01 |
| CN106994266B true CN106994266B (en) | 2024-04-19 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108704369B (en) * | 2018-06-13 | 2020-11-24 | 广州发展集团股份有限公司 | Circulating water filter device, system and water filtering method |
| CN113028290A (en) * | 2021-04-28 | 2021-06-25 | 中建五局安装工程有限公司 | Pipeline system with flushing function and flushing method |
| CN113617096A (en) * | 2021-09-03 | 2021-11-09 | 南通普菲特涂装有限公司 | High-efficient electrophoresis lacquer filter equipment |
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|---|---|---|---|---|
| GB555324A (en) * | 1942-02-11 | 1943-08-17 | Glenfield & Kennedy Ltd | Self-cleaning pressure strainer for water |
| EP0361217A1 (en) * | 1988-09-27 | 1990-04-04 | Boll & Kirch Filterbau GmbH | Brack-wash filter |
| CN2737449Y (en) * | 2004-06-18 | 2005-11-02 | 上海万森水处理有限公司 | On-line cleaning strainer element filtering device |
| CN202666528U (en) * | 2012-07-11 | 2013-01-16 | 深圳市宏洲工业气体有限公司 | Rectifier cabinet cooling water filtering device |
| CN204460519U (en) * | 2014-12-08 | 2015-07-08 | 中国建筑设计咨询有限公司 | A kind of central air conditioning water system that automatically can carry out scrubbing to filter |
| CN204534901U (en) * | 2015-01-23 | 2015-08-05 | 杨作信 | A kind of energy-saving household central air-conditioning |
| CN205307934U (en) * | 2016-01-26 | 2016-06-15 | 北京豪盛恒大科技有限公司 | Central air conditioning filtration system |
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| CN106994266A (en) | 2017-08-01 |
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