CN114413646A - Dirty blockage state determination device and determination method for condenser - Google Patents
Dirty blockage state determination device and determination method for condenser Download PDFInfo
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- CN114413646A CN114413646A CN202011174132.8A CN202011174132A CN114413646A CN 114413646 A CN114413646 A CN 114413646A CN 202011174132 A CN202011174132 A CN 202011174132A CN 114413646 A CN114413646 A CN 114413646A
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- temperature difference
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000012530 fluid Substances 0.000 claims abstract description 72
- 239000002826 coolant Substances 0.000 claims abstract description 45
- 238000001514 detection method Methods 0.000 claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 30
- 230000005494 condensation Effects 0.000 claims description 21
- 238000009833 condensation Methods 0.000 claims description 21
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 230000002159 abnormal effect Effects 0.000 claims description 6
- 239000012267 brine Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B11/00—Controlling arrangements with features specially adapted for condensers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The present disclosure provides a dirty-blockage state determination apparatus for a condenser and a method for determining a dirty-blockage state of a condenser, the dirty-blockage state determination apparatus including: a first detection part provided at the first discharge line to obtain a temperature value T1 of the liquid cooling medium; the second detection part is arranged at the second discharge pipeline and is used for measuring the parameters of the working fluid; and the control part is connected with the first detection part and the second detection part, acquires a temperature value T2 associated with the working fluid, calculates the temperature value T2 and the temperature difference of the temperature value T1, compares the temperature difference with a preset temperature difference threshold value, and judges that the condenser is dirty and blocked if the temperature difference is greater than the temperature difference threshold value. According to the dirty-blockage state determination device and the dirty-blockage state determination method, the dirty blockage state in the condenser can be reliably and effectively determined.
Description
Technical Field
The present invention relates to a dirty-blockage state determination device for a condenser and a method for determining a dirty state of a condenser.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
The condenser generally condenses the gaseous working fluid into a liquid working fluid using a liquid cooling medium such as cooling water. Since carbonic acid is easily formed when the cooling medium flows over the metal surface, and dissolved oxygen in the liquid cooling medium causes corrosion and rusting of the metal, a large amount of rusty impurities and dust are carried in the liquid cooling medium, and are deposited in the condenser, and the increase of the deposits increases the energy consumption, thereby reducing the condensing efficiency of the condenser. And when the deposits are excessive, the condenser may be completely blocked, so that the condenser cannot be normally operated.
Therefore, it is very important to provide a dirty-state determination device for determining a dirty state in the condenser.
Disclosure of Invention
It is an object of one or more embodiments of the present disclosure to provide a dirty-condition determination device and a dirty-condition determination method that can reliably and efficiently determine a dirty condition in a condenser in different ways.
Another object of one or more embodiments of the present disclosure is to provide a dirty state determination device and a dirty state determination method that can sensitively and accurately determine a dirty state in a condenser.
According to an aspect of the present disclosure, there is provided a dirty-blockage status determination device for a condenser that exchanges heat with a liquid cooling medium and includes a first inflow line and a first discharge line for the liquid cooling medium and a second inflow line and a second discharge line for a working fluid, the dirty-blockage status determination device including: a first detection portion provided at the first discharge line to acquire a temperature value T1 of the liquid cooling medium; a second detection portion provided at the second discharge pipe, measuring a parameter of the working fluid; and the control part is connected with the first detection part and the second detection part, the control part acquires a temperature value T2 associated with the working fluid according to the measured parameters of the working fluid, the control part calculates the temperature difference between the temperature value T2 and the temperature value T1, compares the temperature difference with a preset temperature difference threshold value, and judges that the condenser is dirty and blocked if the temperature difference is greater than the temperature difference threshold value.
According to an aspect of the present disclosure, the second detection portion is a pressure sensor, and the parameter of the working fluid is a condensing pressure of the working fluid; the control part acquires the temperature value T2 according to the condensation pressure of the working fluid; or the second detection part is a temperature sensor, and the parameter of the working fluid is the discharge temperature of the working fluid; the control unit directly obtains the discharge temperature of the working fluid as the temperature value T2.
According to one aspect of the disclosure, the filth blockage state determination device further comprises an alarm module, the alarm module is connected with the control part, and the alarm module gives an alarm when the control part determines that filth blockage occurs.
According to one aspect of the disclosure, the alarm module includes a display screen of the control portion, and the display screen displays abnormal state information when the control portion determines that filth blockage occurs.
According to one aspect of the disclosure, the liquid cooling medium is water, brine, or a mixture of water and ethylene glycol.
According to one aspect of the disclosure, the temperature difference threshold is in the range of 12 ℃ to 15 ℃.
According to an aspect of the present disclosure, the first detection portion is a temperature sensor.
According to another aspect of the present disclosure, there is provided a method for determining a dirty-blockage condition of a condenser that exchanges heat with a liquid cooling medium and that includes first and second inflow lines and a first discharge line for the liquid cooling medium and second inflow lines and a second discharge line for a working fluid, the method comprising: a first measurement step of measuring the temperature of the liquid cooling medium at the first discharge line to obtain a temperature value T1 of the liquid cooling medium; a second measurement step of measuring a parameter of the working fluid at the second discharge line; a temperature acquisition step of acquiring a temperature value T2 associated with the working fluid from the measured parameter of the working fluid; a calculation step of calculating a temperature difference from the temperature value T2 and the temperature value T1; comparing the calculated temperature difference with a preset temperature difference threshold value; and a determination step of determining that dirty clogging has occurred in the condenser if the temperature difference is greater than the temperature difference threshold.
According to another aspect of the present disclosure, in the second measuring step, the parameter of the working fluid is a condensing pressure of the working fluid, and, in the temperature obtaining step, the temperature value T2 is obtained from the measured condensing pressure of the working fluid; or in the second measuring step, the parameter of the working fluid is a discharge temperature of the working fluid, and in the temperature acquiring step, the measured discharge temperature of the working fluid is directly acquired as the temperature value T2.
According to another aspect of the present disclosure, the method further comprises an alarming step of giving an alarm when the judging step judges that the filth is present.
According to another aspect of the disclosure, the alarm is abnormal state information displayed on a display screen.
According to the dirty state determination device and the dirty state determination method for the condenser, the dirty state in the condenser can be reliably and effectively determined.
Drawings
Features and advantages of one or more embodiments of the present invention will become more readily apparent from the following description taken in conjunction with the accompanying drawings. The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. The figures are not drawn to scale and some features may be exaggerated or minimized to show details of particular components. In the drawings:
fig. 1 is a schematic view schematically showing a filth blockage state determination device for a condenser according to a first embodiment of the present disclosure;
fig. 2 is a flowchart schematically showing a method of dirty-condition determination using the dirty-condition determination device for a condenser according to the first embodiment of the present disclosure;
FIG. 3 is a temperature profile of a cooling medium and a working fluid as a function of thermal resistance;
fig. 4 is a schematic view schematically showing a filth blockage state determination device for a condenser according to a second embodiment of the present disclosure; and
fig. 5 is a flowchart schematically showing a method of dirty-condition determination using a dirty-condition determination device for a condenser according to a second embodiment of the present disclosure.
Detailed Description
The present disclosure will now be described with reference to the accompanying drawings, which are illustrative only and are not to be construed as limiting the disclosure and its applications.
As shown in fig. 1, the condenser 1 exchanges heat with a liquid cooling medium, and includes a first inflow line 10 and a first discharge line 20 for the liquid cooling medium, and a second inflow line (not shown) and a second discharge line 30 for a working fluid. During operation of the condenser, gaseous working fluid enters the condenser 1 from the second inflow line, exchanges heat with the low temperature liquid cooling medium during flow through the condenser 1 to transfer heat to the cooling medium to condense into liquid working fluid, and thereafter exits the condenser 1 via the second discharge line 30. Meanwhile, the cooling medium of a low temperature enters the condenser 1 from the first inflow line 10 and absorbs heat of the working fluid in the condenser 1 and thus the temperature thereof is increased, and the cooling medium of a high temperature is discharged out of the condenser 1 through the first discharge line 20.
The liquid cooling medium may include, for example, water, brine, a mixture of water and glycol, and the like. Preferably, water may be used as the cooling medium because of its higher specific heat capacity and lower use cost.
The condenser 1 is further provided with a condenser filth blockage determination device for determining a filth blockage state of the condenser. As shown in fig. 1, the dirty-blockage state determination apparatus for a condenser according to the first embodiment of the present disclosure includes a first detection part 410, a second detection part 420, and a control part 430. In fig. 1, first detection portion 410 is exemplarily shown as being provided at first exhaust line 20 and having the exhaust temperature of the cooling medium as temperature value T1 of the cooling medium. The second detection part 420 is a pressure sensor provided at the second discharge line 30 for measuring a condensing pressure of the working fluid of the discharge condenser in the second discharge line 30.
The control unit 430 is connected to the first detection unit 410 and the second detection unit 420. The control portion 430 acquires the temperature value T2 related to the working fluid from the condensation pressure of the working fluid, for example, converts the measured condensation pressure of the working fluid into the condensation temperature of the working fluid, and acquires the condensation temperature as the temperature value T2 related to the working fluid. The control portion 430 calculates a temperature difference between the temperature value T2 associated with the working fluid and the temperature value T1 of the liquid cooling medium, compares the temperature difference with a preset temperature difference threshold value stored in the control portion, and if the temperature difference is greater than the preset temperature difference threshold value, the control portion 430 determines that the condenser 1 is fouled. In the present application, the preset temperature difference threshold may be in the range of 12 ℃ to 15 ℃, in which on the one hand the sensitivity of the dirty-blockage situation determination means can be ensured, and on the other hand frequent cleaning of the condenser deposits due to too low a threshold can be avoided.
The filth blockage state determination apparatus for a condenser according to the first embodiment of the present disclosure may further include an alarm module 50, the alarm module 50 being connected to the control part 430 and emitting alarm information, such as sound and/or light, when the control part 430 determines that the filth blockage occurs in the condenser 1. In the embodiment shown in fig. 1, the alarm module 50 is shown as a separate alarm device from the control part 430, and alternatively, the alarm module 50 may also include a display screen of the control part 430 that outputs abnormal state information to prompt filth blockage. In this way, the use of an additional alarm device can be avoided, and the cost is saved.
Next, a method of performing dirty-condition determination using the dirty-condition determination device for a condenser according to the first embodiment of the present disclosure will be described in detail with reference to fig. 2. First, in the first measurement step S100, the first detection portion 410 measures the temperature of the liquid cooling medium to obtain a temperature value T1 of the liquid cooling medium; and in the second measurement step S200, the second detection part 420 measures the condensation pressure of the working fluid in the second discharge line 30. Then, in the temperature acquisition step S300, the control part 430 acquires the temperature value T2 from the condensation pressure of the working fluid, for example, converts the condensation pressure of the working fluid into the condensation temperature of the working fluid, and acquires the condensation temperature as the temperature value T2. Next, in calculation step S400, control unit 430 calculates a temperature difference between temperature value T2 relating to the working fluid and temperature value T1 of the liquid cooling medium. Subsequently, in the comparison step S500, the control part 430 compares the calculated temperature difference with a preset temperature difference threshold. Finally, in the determination step S600, if the temperature difference is greater than the preset temperature difference threshold, the control portion 430 determines that the condenser 1 is dirty-blocked. The method may further include an alarming step S700 of, when the determination step S600 determines that the filth has occurred, giving an alarm, which may be abnormal state information displayed by the display screen of the control part 430, to the alarming step S700.
Compared to the dirty-blockage-state determination apparatus that measures the inflow temperature and the discharge temperature of the cooling medium using two temperature sensors provided on the first inflow line 10 and the first discharge line 20, and determines the dirty blockage state using the temperature difference between the inflow temperature and the discharge temperature, the dirty-blockage-state determination apparatus according to the first embodiment of the present disclosure can effectively improve the sensitivity of the determination apparatus, thereby improving the condensation performance of the condenser and reducing the energy consumption of the system. Specifically, in the dirty-state determination device that uses the temperature difference between the inflow temperature and the discharge temperature of the cooling medium as a determination criterion, the dirty-state determination device can determine the dirty-state phenomenon only when the condenser is completely clogged with the deposits. On the one hand, this leads to a reduced condenser performance and an increased energy consumption, and on the other hand, the difference in water pressure in and out becomes greater when the condenser is completely blocked by deposits, thus easily causing the system to give rise to high-pressure alarms, which are potentially harmful to the safe operation of the compressor used in conjunction with the condenser. Through repeated research, the inventor of the application finds that the dirty blockage phenomenon in the condenser can be judged more sensitively and accurately by adopting the difference value between the condensation temperature of the working fluid and the relevant temperature of the cooling medium, so that the sensitivity of the judging device is improved, and the condensation performance of the condenser is improved.
The filth blockage state determination device according to the first embodiment of the present disclosure may determine a filth blockage state and automatically trigger alarm information or display state abnormality information in a case where the water-cooled condenser is not completely blocked with less deposits. Therefore, the filth blockage state judgment device according to the first embodiment of the disclosure can avoid high-pressure alarm, improve the reliability and energy efficiency of the unit, and can also avoid the labor cost of needing personnel to clean the filter regularly.
Fig. 3 is a temperature graph of a cooling medium and a working fluid according to a change in thermal resistance, in which a curve a is a curve showing a condensation temperature of the working fluid according to the change in thermal resistance, a curve b is a curve showing a discharge temperature of the cooling medium according to the change in thermal resistance, and a curve c is a curve showing an inflow temperature of the cooling medium according to the change in thermal resistance. In the condenser 1, as the deposits are accumulated more, the thermal resistance of the condenser 1 is gradually increased accordingly. As shown in fig. 3, as the thermal resistance increases, the condensation temperature of the working fluid increases accordingly, while the discharge temperature and the inflow temperature of the cooling medium remain substantially unchanged. Therefore, the dirty-clogging state determination device that determines using the temperature difference between the discharge temperature and the inflow temperature of the cooling medium cannot determine the dirty-clogging phenomenon sensitively and accurately. In contrast, the dirty-blockage state determination device according to the first embodiment of the present disclosure determines a dirty blockage state by using a temperature difference between a condensation temperature of the working fluid and a discharge or inflow temperature of the cooling medium, and the temperature difference can sensitively and accurately reflect a dirty blockage phenomenon in the condenser, so that the sensitivity of the dirty-blockage state determination device can be effectively improved.
A dirty-condition determining apparatus for a condenser according to a second embodiment of the present disclosure will be described in detail with reference to fig. 4. The dirty-state determination device for a condenser according to the second embodiment of the present disclosure has a main structure and functions substantially identical to those of the dirty-state determination device for a condenser according to the first embodiment of the present disclosure, except that the second detection portion is used instead of the pressure sensor, and a temperature sensor is used.
As shown in fig. 4, the dirty-state determination device for a condenser according to the second embodiment of the present disclosure includes a second detection portion 420a, and the second detection portion 420a is a temperature sensor that measures the discharge temperature of the working fluid, so that the control portion 430 connected to the second detection portion 420a can directly acquire the discharge temperature of the working fluid as a temperature value T2 related to the working fluid.
Fig. 5 is a flowchart illustrating a method of determining using the filth blockage state determination device for a condenser according to the second embodiment of the present disclosure. The steps of the method of determining using the filth condition determination device according to the second embodiment of the present disclosure are substantially the same as the steps of the method of determining using the filth condition determination device according to the first embodiment of the present disclosure, except that the second detection part 420a measures the discharge temperature of the working fluid in the second measurement step S200'. Then, in condensation temperature acquisition step S300', control unit 430 directly acquires the working fluid discharge temperature as temperature value T2 relating to the working fluid.
The dirty state determination apparatus and method for a condenser according to the second embodiment of the present disclosure may replace a pressure sensor with a less expensive temperature sensor, thereby saving production costs, as compared to the dirty state determination apparatus and method for a condenser according to the first embodiment of the present disclosure.
Although various embodiments of the present invention have been described in detail herein, it is to be understood that this invention is not limited to the particular embodiments described and illustrated in detail herein, and that other modifications and variations may be effected by one skilled in the art without departing from the spirit and scope of the invention. All such variations and modifications are intended to be within the scope of the present invention. Moreover, all the components described herein may be replaced by other technically equivalent components.
Claims (11)
1. A filth condition determination device for a condenser, the condenser (1) exchanging heat with a liquid cooling medium and including a first inflow piping (10) and a first discharge piping (20) for the liquid cooling medium and a second inflow piping and a second discharge piping (30) for a working fluid, characterized by comprising:
a first detection portion (410) provided at the first discharge line (20) to acquire a temperature value T1 of the liquid cooling medium;
a second detection portion (420,420a) provided at the second discharge line (30) and measuring a parameter of a working fluid; and
a control part (430), the control part with first detection part with the second detection part is connected, the control part is according to surveying the parameter acquisition of working fluid with temperature value T2 that the working fluid is relevant, the control part calculates temperature value T2 with the temperature difference of temperature value T1, will the temperature difference is compared with preset temperature difference threshold value, if the temperature difference is greater than the temperature difference threshold value then judge that dirty blocking appears in condenser (1).
2. A filth blockage state determination apparatus for a condenser according to claim 1, wherein:
the second detection part (420) is a pressure sensor, and the parameter of the working fluid is the condensation pressure of the working fluid; the control part (430) acquires the temperature value T2 according to the condensation pressure of the working fluid; or
The second detection unit (420a) is a temperature sensor, and the parameter of the working fluid is a discharge temperature of the working fluid; the control unit (430) directly obtains the discharge temperature of the working fluid as the temperature value T2.
3. A filth blockage state determination apparatus for a condenser according to claim 1, wherein:
the filth blockage state judging device further comprises an alarm module (50), the alarm module is connected with the control part, and the alarm module gives an alarm when the control part judges that filth blockage occurs.
4. A filth blockage state determination apparatus for a condenser according to claim 3, wherein:
the alarm module comprises a display screen of the control part, and the display screen displays state abnormal information when the control part judges that filth blockage occurs.
5. A filth blockage state determination device for a condenser according to any one of claims 1 to 4, wherein the liquid cooling medium is water, brine, or a mixture of water and ethylene glycol.
6. A filth blockage state determination apparatus for a condenser according to any one of claims 1 to 4, wherein the temperature difference threshold value is in a range of 12 ℃ to 15 ℃.
7. A filth blockage state determination apparatus for a condenser according to any one of claims 1 to 4, wherein the first detection part is a temperature sensor.
8. Method for determining the dirty status of a condenser, the condenser (1) exchanging heat with a liquid cooling medium and comprising a first inflow (10) and a first discharge (20) for the liquid cooling medium and a second inflow and a second discharge (30) for a working fluid, characterized in that the method comprises:
a first measurement step of measuring the temperature of the liquid cooling medium at the first exhaust line (20) to obtain a temperature value T1 of the liquid cooling medium;
a second measurement step of measuring a parameter of the working fluid at the second discharge line (30);
a temperature acquisition step of acquiring a temperature value T2 associated with the working fluid from the measured parameter of the working fluid;
a calculation step of calculating a temperature difference from the temperature value T2 and the temperature value T1;
comparing the calculated temperature difference with a preset temperature difference threshold value; and
and judging that the condenser is dirty and blocked if the temperature difference is larger than the temperature difference threshold value.
9. A method for determining a dirty condition of a condenser as claimed in claim 8, wherein:
in the second measurement step, the parameter of the working fluid is a condensation pressure of the working fluid, and in the temperature acquisition step, the temperature value T2 is acquired from the measured condensation pressure of the working fluid; or
In the second measuring step, the parameter of the working fluid is a discharge temperature of the working fluid, and in the temperature acquiring step, the measured discharge temperature of the working fluid is directly acquired as the temperature value T2.
10. A method for determining a dirty condition of a condenser, as claimed in claim 8 or 9, wherein the method further comprises an alarm step, wherein the alarm step raises an alarm when the determination step determines that a dirty condition has occurred.
11. A method for determining a dirty condition of a condenser as claimed in claim 10, wherein the alarm is abnormal state information displayed on a display screen.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011174132.8A CN114413646A (en) | 2020-10-28 | 2020-10-28 | Dirty blockage state determination device and determination method for condenser |
| PCT/CN2020/130363 WO2022088317A1 (en) | 2020-10-28 | 2020-11-20 | Filth blockage state determination apparatus and determination method for condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011174132.8A CN114413646A (en) | 2020-10-28 | 2020-10-28 | Dirty blockage state determination device and determination method for condenser |
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| CN114413646A true CN114413646A (en) | 2022-04-29 |
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| CN202011174132.8A Pending CN114413646A (en) | 2020-10-28 | 2020-10-28 | Dirty blockage state determination device and determination method for condenser |
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| WO (1) | WO2022088317A1 (en) |
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- 2020-11-20 WO PCT/CN2020/130363 patent/WO2022088317A1/en active Application Filing
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| CN102720045A (en) * | 2012-05-24 | 2012-10-10 | 海尔集团公司 | Control method for judging blockage of lint filter of heat pump clothes dryer and clothes dryer |
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| CN103940039A (en) * | 2014-04-03 | 2014-07-23 | 美的集团股份有限公司 | Air conditioner and judgment method of operating state of air conditioner |
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| WO2022088317A1 (en) | 2022-05-05 |
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