CN113803811A - Control method for automatic water changing of evaporative condenser water tank - Google Patents
Control method for automatic water changing of evaporative condenser water tank Download PDFInfo
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- CN113803811A CN113803811A CN202110503578.9A CN202110503578A CN113803811A CN 113803811 A CN113803811 A CN 113803811A CN 202110503578 A CN202110503578 A CN 202110503578A CN 113803811 A CN113803811 A CN 113803811A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 171
- 238000000034 method Methods 0.000 title claims abstract description 27
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 19
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000011575 calcium Substances 0.000 claims abstract description 19
- 229910001424 calcium ion Inorganic materials 0.000 claims abstract description 19
- 229910001425 magnesium ion Inorganic materials 0.000 claims abstract description 19
- 238000004378 air conditioning Methods 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims description 24
- 239000003792 electrolyte Substances 0.000 claims description 11
- 230000002596 correlated effect Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000001704 evaporation Methods 0.000 claims description 4
- 230000008020 evaporation Effects 0.000 claims description 4
- 238000001816 cooling Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 239000013589 supplement Substances 0.000 abstract description 5
- 239000010865 sewage Substances 0.000 abstract description 4
- 150000003839 salts Chemical class 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/0035—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using evaporation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/04—Condensers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Human Computer Interaction (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a control method for automatically changing water in an evaporative condenser water tank, belonging to the technical field of cooling equipment and comprising the following steps: s1, adopting the conductivity as the characteristic value of the concentration of calcium and magnesium ions in the circulating water; s2: according to the calculation, the 1us/c conductivity is 0.5ppm hardness, so the conductivity control threshold is set according to the formula; s3: setting a conductivity threshold value of circulating water in the water tank; s4: and when the conductivity of the circulating water is detected to be larger than the first conductivity threshold value, detecting whether the unit of the air conditioning system is started, and if the unit is started, simultaneously opening the electric drain valve and the electric water replenishing valve. The control method for automatically changing the water in the evaporative condenser water tank can detect the concentration of calcium and magnesium ions in water, obtain approximate numerical values of the calcium and magnesium ions, facilitate observation, automatically drain sewage and supplement new water, and has a better water changing effect.
Description
Technical Field
The invention relates to the technical field of cooling equipment, in particular to a control method for automatically changing water in an evaporative condenser water tank.
Background
The evaporative cooling air conditioning unit is more and more utilized in machine room air conditioners and schedule comfort air conditioners due to energy conservation, the evaporative cooling air conditioning unit adopts water to mark evaporation and take away heat, and water which is not evaporated continues to circulate. Because the water is evaporated continuously, the salt electrolyte dissolved in the water stays in the water which is not evaporated for continuous circulation, although the make-up water is provided, the concentration of the salt electrolyte is higher and higher, so that the severe scaling in the evaporative cooling system is caused, and the operation effect and the service life of the unit are influenced.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
Therefore, the invention aims to provide a control method for automatically changing water in an evaporative condenser water tank, which not only can detect the concentration of calcium and magnesium ions in water to obtain a rough numerical value and facilitate observation, but also can automatically drain sewage and supplement new water, and has better water changing effect.
To solve the above technical problem, according to an aspect of the present invention, the present invention provides the following technical solutions:
a control method for automatically changing water in an evaporative condenser water tank comprises the following steps:
s1, adopting the conductivity as the characteristic value of the concentration of calcium and magnesium ions in the circulating water;
s2: according to the calculation, the 1us/c conductivity is 0.5ppm hardness, so the conductivity control threshold is set according to the formula;
s3: setting a conductivity threshold value of circulating water in the water tank;
s4: when the conductivity of the circulating water is detected to be larger than a first conductivity threshold value, whether the unit of the air conditioning system is started or not is detected, if the unit is started, the electric drain valve and the electric water replenishing valve are opened simultaneously, the electric drain valve is closed until the conductivity of the circulating water is lower than a second conductivity threshold value, and the electric water replenishing valve is closed until the liquid level reaches a first set value;
s5: if the conductivity of the circulating water is detected to be larger than a first conductivity threshold value and the air conditioning system unit is not started, firstly starting the electric drain valve, and when the liquid level is lower than a second set value, closing the electric drain valve, starting the electric water replenishing valve, and closing the electric water replenishing valve when the liquid level reaches a first set value;
s6: and if the unit is suddenly started in the water changing process, giving a prompt signal, and when the unit reaches the third set liquid level value, starting the unit.
As a preferable scheme of the control method for automatically changing water in the evaporative condenser water tank, the method comprises the following steps: the evaporation of water in step S1 is proportional to the increase of the electrolyte concentration in the water, and the conductivity thereof is positively correlated to the electrolyte concentration in the water, and the electrolyte concentration in the water is positively correlated to the concentration of calcium and magnesium ions, so that the conductivity is used as the characteristic value for monitoring the concentration of calcium and magnesium ions in the circulating water.
As a preferable scheme of the control method for automatically changing water in the evaporative condenser water tank, the method comprises the following steps: setting a first conductivity threshold and a second conductivity threshold as control values for automatic water change and water change stop in the step S3; the first conductivity threshold range is 800-.
As a preferable scheme of the control method for automatically changing water in the evaporative condenser water tank, the method comprises the following steps: the liquid level control in step S4 can be simplified to time control, i.e., control of the water discharge time and the water supplement time.
As a preferable scheme of the control method for automatically changing water in the evaporative condenser water tank, the method comprises the following steps: the first set value, the second set value and the third set value in the steps S5 and S6 respectively represent the following meanings: the first set value represents the highest water level in the water tank, the second set value is the position of the water tank for draining the circulating water, and the third set value is the basic water level for meeting the operation of the unit.
Compared with the prior art: when the conductivity of the circulating water is detected to be larger than a first conductivity threshold value, whether the unit of the air conditioning system is started or not is detected, if the unit is started, the electric drain valve and the electric water replenishing valve are opened simultaneously until the conductivity of the circulating water is lower than a second conductivity threshold value, the electric drain valve is closed, the electric water replenishing valve is closed when the liquid level reaches a first set value, if the conductivity of the circulating water is detected to be larger than the first conductivity threshold value, the air conditioning system unit is not started, the electric drainage valve is firstly started, if the unit is suddenly started in the water changing process, a prompt signal is given, when the unit reaches a third set value of the liquid level, the unit can be started, the control method for automatically changing the water in the evaporative condenser water tank can detect the concentration of calcium and magnesium ions in water, obtain approximate numerical values of the calcium and magnesium ions, facilitate observation, automatically drain sewage and supplement new water, and has a better water changing effect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail with reference to the accompanying drawings and detailed embodiments, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise. Wherein:
FIG. 1 is a block diagram of the present invention;
fig. 2 is a cross-sectional view of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described herein, and it will be apparent to those of ordinary skill in the art that the present invention may be practiced without departing from the spirit and scope of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Next, the present invention will be described in detail with reference to the drawings, and in the detailed description of the embodiments of the present invention, the cross-sectional views illustrating the structure of the device are not enlarged partially according to the general scale for convenience of illustration, and the drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The invention provides a control method for automatically changing water in a water tank of an evaporative condenser, which can detect the concentration of calcium and magnesium ions in water, obtain approximate numerical values of the calcium and magnesium ions, facilitate observation, automatically drain sewage and supplement new water, and has better water changing effect, and please refer to fig. 1;
referring again to fig. 1, the method includes the following steps:
s1, adopting the conductivity as the characteristic value of the concentration of calcium and magnesium ions in the circulating water, wherein the calcium and magnesium ions in the water are the main reason for scaling the circulating water on a condenser, so that monitoring the ion concentration is the main control means for preventing scaling, but the monitoring of the concentration of the calcium and magnesium ions is difficult and has high cost; because the concentration of electrolyte in water is increased due to the evaporation of water in the same ratio, the conductivity of the water is positively correlated with the concentration of the electrolyte in the water, and the concentration of the electrolyte in the water is positively correlated with the concentration of calcium and magnesium ions, the conductivity is used as a characteristic value for monitoring the concentration of the calcium and magnesium ions in the circulating water;
s2: according to the calculation, the 1us/c conductivity is 0.5ppm hardness, so the conductivity control threshold is set according to the formula;
s3: setting a conductivity threshold value of circulating water in the water tank, wherein a first conductivity threshold value and a second conductivity threshold value are set as control values for automatically changing water and stopping changing water; the first conductivity threshold range is 800-;
s4: when the conductivity of the circulating water is detected to be larger than a first conductivity threshold value, whether the unit of the air-conditioning system is started is detected, if the unit is started, the electric drain valve and the electric water replenishing valve are opened simultaneously, the electric drain valve is closed until the conductivity of the circulating water is lower than a second conductivity threshold value, the electric water replenishing valve is closed until the liquid level reaches a first set value, and the liquid level control can be simplified into time control, namely, the water draining time and the water replenishing time are controlled;
s5: if the conductivity of the circulating water is detected to be larger than a first conductivity threshold value and the air conditioning system unit is not started, firstly starting the electric drain valve, and when the liquid level is lower than a second set value, closing the electric drain valve, starting the electric water replenishing valve, and closing the electric water replenishing valve when the liquid level reaches a first set value;
s6: if the unit is suddenly started in the water changing process, a prompt signal is given, when the unit reaches a third liquid level set value, the unit can be started, and the first set value, the second set value and the third set value respectively represent the following meanings: the first set value represents the highest water level in the water tank, the second set value is the position of the water tank for draining the circulating water, and the third set value is the basic water level for meeting the operation of the unit.
Example 1
Setting a first conductivity threshold value as 1000us/c, setting a second conductivity threshold value as 500us/c, and detecting whether the unit equipment is opened again when detecting that the conductivity of the circulating water exceeds the first conductivity threshold value 1000 us/c; when the unit equipment is opened, the electric drain valve and the electric water replenishing valve are opened, so that water in the water tank starts to flow circularly, water with high conductivity is discharged, when the conductivity of the circulating water is detected to be lower than a second conductivity threshold value, the electric drain valve is closed, the water is stopped to be discharged, and water is continuously replenished for the interior until the liquid level detection reaches the highest water level in the water tank; when the unit equipment is not opened, the electric drain valve is firstly opened to drain water, when the liquid level detects that the liquid level is lower than the position of the water tank for draining the circulating water, the electric drain valve is closed, then the electric water replenishing valve is opened, and the internal water is replenished until the liquid level detects the highest water level in the water tank.
Example 2
Setting the first conductivity threshold value to be 1200us/c, setting the second conductivity threshold value to be 800us/c, and detecting whether the unit equipment is opened again when detecting that the conductivity of the circulating water exceeds the first conductivity threshold value 1200 us/c; when the unit equipment is opened, the electric drain valve and the electric water replenishing valve are opened, so that the water in the unit equipment starts to flow circularly, the water with high conductivity is discharged, when the condition that the conductivity of the circulating water is lower than a second conductivity threshold value is detected, the electric drain valve is closed, the water is stopped to be discharged, and the electric water replenishing valve performs water replenishing operation for 30 minutes, so that the liquid level after the water replenishing is finished is at the highest water level in the water tank; when the unit equipment is not opened, the electric drain valve is firstly opened to drain water for 30 minutes, so that the liquid level after draining is lower than the position of the water tank for draining the circulating water completely, the electric drain valve is closed, and then the electric water replenishing valve is opened to replenish water for 30 minutes, so that the liquid level after replenishing water reaches the highest water level in the water tank.
While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the various features of the disclosed embodiments of the invention may be used in any combination, provided that no structural conflict exists, and the combinations are not exhaustively described in this specification merely for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (5)
1. A control method for automatically changing water in an evaporative condenser water tank is characterized by comprising the following steps:
s1, adopting the conductivity as the characteristic value of the concentration of calcium and magnesium ions in the circulating water;
s2: according to the calculation, the 1us/c conductivity is 0.5ppm hardness, so the conductivity control threshold is set according to the formula;
s3: setting a conductivity threshold value of circulating water in the water tank;
s4: when the conductivity of the circulating water is detected to be larger than a first conductivity threshold value, whether the unit of the air conditioning system is started or not is detected, if the unit is started, the electric drain valve and the electric water replenishing valve are opened simultaneously, the electric drain valve is closed until the conductivity of the circulating water is lower than a second conductivity threshold value, and the electric water replenishing valve is closed until the liquid level reaches a first set value;
s5: if the conductivity of the circulating water is detected to be larger than a first conductivity threshold value and the air conditioning system unit is not started, firstly starting the electric drain valve, and when the liquid level is lower than a second set value, closing the electric drain valve, starting the electric water replenishing valve, and closing the electric water replenishing valve when the liquid level reaches a first set value;
s6: and if the unit is suddenly started in the water changing process, giving a prompt signal, and when the unit reaches the third set liquid level value, starting the unit.
2. The method as claimed in claim 1, wherein the evaporation of water in step S1 results in an increase in electrolyte concentration, the conductivity of the water is positively correlated to the electrolyte concentration, and the electrolyte concentration is positively correlated to the calcium and magnesium ion concentration, so that the conductivity is used as the characteristic value for monitoring the calcium and magnesium ion concentration in the circulating water.
3. The evaporative condenser water tank automatic water changing control method as claimed in claim 1, wherein the first conductivity threshold and the second conductivity threshold are set as control values for automatic water changing and stopping water changing in step S3; the first conductivity threshold range is 800-.
4. The method as claimed in claim 1, wherein the liquid level control in step S4 is simplified to time control, i.e. control of the water draining time and the water replenishing time.
5. The method as claimed in claim 1, wherein the first, second and third setting values in steps S5 and S6 represent: the first set value represents the highest water level in the water tank, the second set value is the position of the water tank for draining the circulating water, and the third set value is the basic water level for meeting the operation of the unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110503578.9A CN113803811A (en) | 2021-05-10 | 2021-05-10 | Control method for automatic water changing of evaporative condenser water tank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110503578.9A CN113803811A (en) | 2021-05-10 | 2021-05-10 | Control method for automatic water changing of evaporative condenser water tank |
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| CN113803811A true CN113803811A (en) | 2021-12-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117505412A (en) * | 2024-01-04 | 2024-02-06 | 江苏盖德冷冻机有限公司 | Automatic sewage disposal device for evaporation type screw brine machine set and use method |
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| CN107975897A (en) * | 2017-11-21 | 2018-05-01 | 西安工程大学 | A kind of solar chimney cold supply system compound with evaporation cooling cold wind tower |
| CN110410973A (en) * | 2019-07-24 | 2019-11-05 | 广东美的制冷设备有限公司 | Air conditioner and its humidifying controlling method |
-
2021
- 2021-05-10 CN CN202110503578.9A patent/CN113803811A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5374380A (en) * | 1992-12-23 | 1994-12-20 | F F Seely Nominees Pty Ltd. | Salinity control of sump water using conductivity probes |
| US20090065188A1 (en) * | 2007-09-10 | 2009-03-12 | Fu-Chin Liu | Water quality control method for an evaporative cooling water chiller and a system thereof |
| CN201193861Y (en) * | 2007-12-05 | 2009-02-11 | 上海信息产业(集团)有限公司 | Soft water supply system and air conditioner system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117505412A (en) * | 2024-01-04 | 2024-02-06 | 江苏盖德冷冻机有限公司 | Automatic sewage disposal device for evaporation type screw brine machine set and use method |
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