CN201965003U - Refrigeration agent leakage monitoring system - Google Patents
Refrigeration agent leakage monitoring system Download PDFInfo
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- CN201965003U CN201965003U CN2010206444431U CN201020644443U CN201965003U CN 201965003 U CN201965003 U CN 201965003U CN 2010206444431 U CN2010206444431 U CN 2010206444431U CN 201020644443 U CN201020644443 U CN 201020644443U CN 201965003 U CN201965003 U CN 201965003U
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Abstract
The utility model relates to a refrigeration agent leakage monitoring system. The system adopts a refrigeration agent infrared gas sensor 1 to detect refrigeration agent concentration data in a refrigerating plant room in real time, and transfers signals to an A/D (analog/digital) converter 2; the signals are converted through the A/D converter 2 and then transferred to a direct digital controller (DDC) 3 to be processed; and the direct digital controller (DDC) 3 displays the concentration of a refrigeration agent on a display 5 and also decides whether an alarm 4 performs off-limit alarm according to process results of an internal procedure of the direct digital controller (DDC) 3. The system comprises the refrigeration agent infrared gas sensor 1, the A/D converter 2, the direct digital controller (DDC) 3, the alarm 4 and the display 5, can automatically monitor whether the refrigeration agent in the refrigerating plant room is leaked in real time and perform the automatic alarm, and has the characteristics of simple structure and easy operation.
Description
Affiliated technical field
The utility model relates to a kind of freezing medium leakage monitoring system, relates in particular to the system that whether a kind of real-time automatic monitoring refrigerating plant room inner refrigerant leaks and report to the police automatically.
Background technology
Along with industry, agricultural, national defence and science and technology development, Refrigeration Technique all is widely used in every field.The refrigeration modes of general refrigeration machine is an artificial cooling, mainly adopts liquid vaporizing system cold process, comprising steam compression type refrigeration, absorption refrigeration and steam-sprayed refrigeration.The refrigeration system of all refrigeration machines all might produce the freezing medium leakage problem.Especially be the refrigeration machine of cold-producing medium for adopting freon, because the freon refrigerant perviousness is strong, and many, the complex structure of refrigeration system interface, so the likelihood ratio of freezing medium leakage is bigger.At present the detection major part of freezing medium leakage is taked artificial or semi-automatic method.The suds leak detecting is arranged, listen the sound leak detecting, estimate leak detecting, Halogen lamp LED leak detecting etc. such as manual method; Semi-automatic method has the electronic leak detector leak detecting, and the sensitivity of electronic leak detector is very high, can detect when the freon leakage amount was 0.5 gram/year.When adopting semi-automatic method to detect, need the close tested position of detector probe, and judge by the acoustic signal and the beat of pointer on the instrument that detector sends whether cold-producing medium leaks.More than these methods be difficult in discovery situation at the beginning of the equipment freezing medium leakage in actual applications, occur just can detecting after the obvious situation in the refrigeration plant operation often by the professional, so not only incured loss through delay the best time of repairing facility, and may cause bigger damage equipment.Meanwhile, though the monitoring system of some robotizations is the leakage situation of monitoring refrigerant automatically, but because its systematic comparison complexity, so implement some difficulty, be a kind of air conditioner of CN1455186 and detect the method that air conditioner refrigerant is leaked that as patent publication No. this method is divided into several sections with whole refrigerant pipe according to expansion valve, monitor the cold-producing medium of each section successively, judge its leakage situation then, so not only complex procedures, and practical operation also has certain difficulty.
At the defective of above prior art, the utility model proposes a kind of freezing medium leakage monitoring system, be specially the system that whether a kind of real-time automatic monitoring refrigerating plant room inner refrigerant leaks and report to the police automatically, this system architecture is simple, processing ease.
Summary of the invention:
Be difficult in time find to leak in order to overcome artificial at present, automanual freezing medium leakage detection method, and labor intensive can not realize the shortcoming of monitoring in real time, and existing automatic monitoring method structure more complicated, implement the shortcoming of certain difficulty, the utility model proposes a kind of freezing medium leakage monitoring system, be specially the system that whether a kind of real-time automatic monitoring refrigerating plant room inner refrigerant leaks and report to the police automatically, this system architecture is simple, processing ease.
The related freezing medium leakage monitoring system of the utility model comprises cold-producing medium infrared gas sensor, A/D converter, direct digital controller (DDC) (DDC), alarm and display five parts.
Described cold-producing medium infrared gas sensor is used to detect the refrigerant concentration in the refrigerating plant room, and the electric signal of gathering is passed to A/D converter.As close as possible refrigeration machine is answered in the test side of described cold-producing medium infrared gas sensor, to guarantee in time to detect the freezing medium leakage situation before the leakage dilution, improves accuracy of detection.In addition, because the proportion of cold-producing medium is greater than air, the ideal height of the test side of described cold-producing medium infrared gas sensor is one meter apart from ground.Determine the type and the quantity of described cold-producing medium infrared gas sensor according to the kind of the area of refrigerating plant room and cold-producing medium.Normal conditions, single-sensor can be protected 50 square metres machine room, if but the refrigeration machine of machine room has used dissimilar cold-producing mediums, and for example, R-134a and R-22 so just need the infrared gas sensor of difference installation and measuring R-134a and R-22.In addition, if room area is bigger, can't be with a sensor during from the single-point acquiring data, need consideration of regional multiple spot acquisition scheme.
Described A/D converter is that the electrical signal conversion that the cold-producing medium infrared gas sensor transmits is become digital signal, and then is transferred to direct digital controller (DDC) (DDC) and handles.
Described A/D converter should have a plurality of signal sampling channels, thereby can read the input signal of a plurality of cold-producing medium infrared gas sensors.Described A/D converter should be able to be complementary with the different types of cold-producing medium infrared gas sensor that is adopted, thereby realizes the monitoring of variety classes freezing medium leakage situation.
Described direct digital controller (DDC) (DDC) is mainly used in two aspects: aspect is to read the signal that the A/D converter transmission comes and be presented on the display, another aspect is that the signal setting value inner with it that the A/D converter transmission comes compared, if the concentration that transmission comes is greater than its inner setting value, then direct digital controller (DDC) (DDC) control alarm carries out off-limit alarm.
The inner setting value of described direct digital controller (DDC) (DDC) determines that according to normal refrigerant concentration value in the machine room refrigerant concentration of being gathered setting value therewith compares.
Described alarm adopts audible-visual annunciator, is mainly used in the signal that receives direct digital controller (DDC) (DDC) output and carries out off-limit alarm, and it is indoor so that in time remind managerial personnel to be installed in monitoring of tools.
Described display is mainly used in the refrigerant concentration that shows direct digital controller (DDC) (DDC) output.It can be the LCD LCD, and it is indoor so that the leakage rate of the clear and definite cold-producing medium of managerial personnel to be installed in monitoring of tools.
The beneficial effects of the utility model are, having overcome present artificial, automanual freezing medium leakage detection method is difficult in time find to leak, and labor intensive can not realize the shortcoming of monitoring in real time, and existing automatic monitoring method structure more complicated, implement the shortcoming of certain difficulty, whether the utility model can leak and warning automatically by real-time automatic monitoring refrigerating plant room inner refrigerant, and this system architecture is simple, processing ease.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 is the pie graph of freezing medium leakage monitoring system
Fig. 2 is the system schematic of embodiment one
Fig. 3 is the system schematic of embodiment two
1. cold-producing medium infrared gas sensors among the figure, 2.A/D converter, 3. direct digital controller (DDC) (DDC), 4. alarm, 5. display, 6. cold-producing medium is the refrigeration machine of R-134a, 7. cold-producing medium is the refrigeration machine of R-22,8.R-134a infrared gas sensor, 9.R-22 infrared gas sensor.
Embodiment
A kind of freezing medium leakage monitoring system (referring to Fig. 1), this system is made up of with display 5 cold-producing medium infrared gas sensor 1, A/D converter 2, direct digital controller (DDC) (DDC) 3, alarm 4.The refrigerant concentration that this system is at first detected in the refrigerating plant room by cold-producing medium infrared gas sensor 1, and become digital data transmission to give direct digital controller (DDC) (DDC) 3 electrical signal conversion of sensor by A/D converter 2, direct digital controller (DDC) (DDC) 3 is presented at the refrigerant concentration that receives on the display 5 on the one hand, on the other hand refrigerant concentration signal and its inner setting value that receives compared, if the refrigerant concentration that direct digital controller (DDC) (DDC) 3 receives is lower than its inner setting value, then only show refrigerant concentration on display 5, alarm 4 does not carry out off-limit alarm; Otherwise direct digital controller (DDC) (DDC) 3 outputs signal to alarm 4, carries out off-limit alarm, and shows refrigerant concentration on display 5, realizes the automatic monitoring and the warning function of system.
Embodiment one (referring to Fig. 2):
This example is on the summation basis, suppose to arrange in the refrigerating plant room two refrigeration machines that cold-producing medium is R-134a, and machine room is arranged two R-134a infrared gas sensors 8, the freezing medium leakage monitoring system the when setting value of direct digital controller (DDC) (DDC) 3 inside is 10ppm simultaneously for example.In this freezing medium leakage monitoring system, two R-134a infrared gas sensors 8 are arranged near the refrigeration machine 6 liftoff one meter positions that cold-producing medium is R-134a, and detect near the concentration of its cold-producing medium in real time.Two R-134a infrared gas sensors 8 are passed to A/D converter 2 with the digital signal of the refrigerant concentration of detection, A/D converter 2 converts the electrical signal to digital signal and is sent to direct digital controller (DDC) (DDC) 3, respectively two R-134a infrared gas sensors, 8 detected refrigerant concentration values are presented on the display 5 on the one hand after the signal Processing of 3 pairs of collections of direct digital controller (DDC) (DDC), direct digital controller (DDC) (DDC) 3 compares the signal of gathering respectively with inner setting value 10ppm on the other hand.If the signal that direct digital controller (DDC) (DDC) 3 is gathered is all smaller or equal to its inner setting value 10ppm, then direct digital controller (DDC) (DDC) 3 is not to alarm 4 output signals, and alarm 4 does not carry out off-limit alarm; If the signal that direct digital controller (DDC) (DDC) 3 is gathered has one greater than its inner setting value 10ppm, 3 pairs of alarm 4 output signals of direct digital controller (DDC) (DDC) then, alarm 4 is implemented off-limit alarm, remind managerial personnel that refrigeration machine is overhauled, each measuring point concentration that maintenance shows according to display, be primarily aimed at the refrigeration machine that measuring point concentration surpasses setting value, to realize the function of freezing medium leakage monitoring system.
Embodiment two (referring to Fig. 3):
This example is on the summation basis, if arrange two refrigeration machines in the machine room, a cold-producing medium is the refrigeration machine of R-134a, another cold-producing medium is the refrigeration machine of R-22, and arrange two R-134a infrared gas sensors 8 and two R-22 infrared gas sensors 9 in the machine room respectively, the freezing medium leakage monitoring system when simultaneously the setting value of direct digital controller (DDC) (DDC) 3 inside is 10ppm for example.In this freezing medium leakage monitoring system, two R-134a infrared gas sensors 8 are arranged near the refrigeration machine 6 that cold-producing medium is R-134a and liftoff one meter position, two R-22 infrared gas sensors 9 are arranged near the refrigeration machine 7 that cold-producing medium is R-22 and liftoff one meter position, simultaneously near the concentration of cold-producing medium two refrigeration machines of real-time respectively detection.Two R-134a infrared gas sensors 8 and two R-22 infrared gas sensors 9 are transferred to A/D converter 2 with the electric signal of the refrigerant concentration that detects respectively simultaneously, A/D converter 2 becomes digital signal to be sent to direct digital controller (DDC) (DDC) 3 these electrical signal conversion, on the one hand the refrigerant concentration value of gathering is presented at respectively on the display 5 after the signal Processing of 3 pairs of collections of direct digital controller (DDC) (DDC), 3 pairs of direct digital controller (DDC)s (DDC) characterize and get its higher value in the numeral of two R-134a concentration and inner setting value 10ppm compares on the other hand, and meanwhile direct digital controller (DDC) (DDC) 3 also can be to getting its higher value and inner setting value 10ppm compares in the numeral that characterizes two R-22 concentration.If the higher value in the signal that direct digital controller (DDC) (DDC) 3 is gathered is all smaller or equal to its inner setting value 10ppm, then direct digital controller (DDC) (DDC) 3 to alarm 4 output signals, do not report to the police by alarm 4; If have one greater than its inner setting value 10ppm in the higher value in the signal that direct digital controller (DDC) (DDC) 3 is gathered, 3 pairs of alarm 4 output signals of direct digital controller (DDC) (DDC) then, this alarm 4 is implemented off-limit alarm, remind managerial personnel that refrigeration machine is overhauled, each measuring point concentration that maintenance shows according to display, be primarily aimed at the refrigeration machine that measuring point concentration surpasses setting value, to realize the function of freezing medium leakage monitoring system.
Claims (2)
1. freezing medium leakage monitoring system, especially automatically the monitoring refrigerant system of whether leaking and reporting to the police automatically, its principal character is: this system is by cold-producing medium infrared gas sensor (1), A/D converter (2), direct digital controller (DDC) (3), alarm (4) is formed with display (5), wherein cold-producing medium infrared gas sensor (1) detects the refrigerant concentration in the refrigerating plant room, and become digital data transmission to give direct digital controller (DDC) (3) electrical signal conversion of cold-producing medium infrared gas sensor (1) by A/D converter (2), direct digital controller (DDC) (3) is presented at the refrigerant concentration that receives on the display (5) on the one hand, determine whether to output signal to alarm (4) on the other hand, carry out off-limit alarm.
2. according to claim 1 described freezing medium leakage monitoring system, it is characterized in that: alarm (4) adopts audible-visual annunciator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206444431U CN201965003U (en) | 2010-12-06 | 2010-12-06 | Refrigeration agent leakage monitoring system |
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| CN2010206444431U CN201965003U (en) | 2010-12-06 | 2010-12-06 | Refrigeration agent leakage monitoring system |
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| CN201965003U true CN201965003U (en) | 2011-09-07 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879526A (en) * | 2012-09-19 | 2013-01-16 | 广东志高空调有限公司 | Detection device for natural carbon-hydrogen working medium refrigerant |
| CN104977138A (en) * | 2014-04-10 | 2015-10-14 | 通用电气公司 | Method and system for detecting coolant leaks in generators |
| CN106410308A (en) * | 2016-11-29 | 2017-02-15 | 华霆（合肥）动力技术有限公司 | Leakage detection warning device, leakage detection warning method and battery module |
| CN106958969A (en) * | 2017-05-27 | 2017-07-18 | 天津天商酷凌科技有限公司 | A kind of secondary refrigerant leakage supervising device of refrigeration system |
| CN107192215A (en) * | 2017-04-21 | 2017-09-22 | 青岛海尔股份有限公司 | Refrigerator refrigerant leakage monitoring device, its control method and control system |
| CN112513605A (en) * | 2018-07-26 | 2021-03-16 | 青岛海尔电冰箱有限公司 | Infrared leakage detection system |
-
2010
- 2010-12-06 CN CN2010206444431U patent/CN201965003U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879526A (en) * | 2012-09-19 | 2013-01-16 | 广东志高空调有限公司 | Detection device for natural carbon-hydrogen working medium refrigerant |
| CN104977138A (en) * | 2014-04-10 | 2015-10-14 | 通用电气公司 | Method and system for detecting coolant leaks in generators |
| CN104977138B (en) * | 2014-04-10 | 2020-04-28 | 通用电气公司 | Method and system for detecting coolant leakage in a generator |
| CN106410308A (en) * | 2016-11-29 | 2017-02-15 | 华霆（合肥）动力技术有限公司 | Leakage detection warning device, leakage detection warning method and battery module |
| CN106410308B (en) * | 2016-11-29 | 2023-10-20 | 华霆（合肥）动力技术有限公司 | Leak detection alarm device and method and battery module |
| CN107192215A (en) * | 2017-04-21 | 2017-09-22 | 青岛海尔股份有限公司 | Refrigerator refrigerant leakage monitoring device, its control method and control system |
| CN106958969A (en) * | 2017-05-27 | 2017-07-18 | 天津天商酷凌科技有限公司 | A kind of secondary refrigerant leakage supervising device of refrigeration system |
| CN112513605A (en) * | 2018-07-26 | 2021-03-16 | 青岛海尔电冰箱有限公司 | Infrared leakage detection system |
| CN112513605B (en) * | 2018-07-26 | 2023-08-15 | 青岛海尔电冰箱有限公司 | Infrared leakage detection system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHONGQING INTERNATIONAL CONSTRUCTION (GROUP) CORPO Free format text: FORMER OWNER: CHONGQING UNIVERSITY Effective date: 20120711 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 400044 SHAPINGBA, CHONGQING TO: 401122 YUBEI, CHONGQING |
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| TR01 | Transfer of patent right |
Effective date of registration: 20120711 Address after: 80 No. 401122 Chongqing northern new hi tech Park Avenue Patentee after: Chongqing International Construction Corporation Address before: 400044 Shapingba street, Shapingba District, Chongqing, No. 174 Patentee before: Chongqing University |
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| CX01 | Expiry of patent term |
Granted publication date: 20110907 |
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| CX01 | Expiry of patent term |