CN206410384U - A kind of low temperature unit secondary refrigerant concentration on-line detecting system - Google Patents
A kind of low temperature unit secondary refrigerant concentration on-line detecting system Download PDFInfo
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- CN206410384U CN206410384U CN201621254490.9U CN201621254490U CN206410384U CN 206410384 U CN206410384 U CN 206410384U CN 201621254490 U CN201621254490 U CN 201621254490U CN 206410384 U CN206410384 U CN 206410384U
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- refrigerating medium
- concentration
- detecting system
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Abstract
The utility model provides a kind of low temperature unit secondary refrigerant concentration on-line detecting system, the compressor connected including closed-loop path, condenser, throttling arrangement and evaporator, the evaporator includes refrigerating medium entrance and refrigerating medium is exported, refrigerating medium entrance and the refrigerating medium outlet is connected by pipeline with refrigerating medium water tank, pipeline between the refrigerating medium entrance and refrigerating medium water tank is provided with concentration on-line checking module, the concentration on-line checking module includes densimeter and detection valve, the densimeter, detection valve is connected with PLC control modules respectively, PLC control modules are connected with refrigerating medium water tank and operation main frame respectively.On-line detecting system of the present utility model can detect refrigerating agent concentration in real time；Detection to refrigerating agent concentration is flexible, according to different operating conditions, can be manually set scope；Concentration Testing controls Integrated design with concentration, the promptness and security of Concentration Testing is improved, so that the stabilization of host computer system, safe operation is effectively ensured.
Description
Technical field
The utility model belongs to low temperature unit automatic control technology field, exists more particularly, to a kind of low temperature unit secondary refrigerant concentration
Line detecting system.
Background technology
The leaving water temperature of low temperature unit is general relatively low, it is necessary to by adding the anti-icing fluid such as ethylene glycol or sodium chloride, calcium chloride
To reduce the freezing point of refrigerating medium, prevent refrigerating medium from freezing.
The freezing point of the refrigerating medium of various concentrations is different, in order to ensure the normal operation of unit, therefore, to assure that refrigerating medium
Concentration is in the range of presetting, and refrigerating medium concentration in unit running process can change, so needs are periodically right
Refrigerating agent concentration is detected and adjusted.
Particularly, when using ethylene glycol as anti-icing fluid, refrigerating medium can be gradually reduced with concentration increase heat-transfer capability, be carried
The viscosity of cryogen increases and increased also with concentration, and can cause the power consumption of coolant pump increases, and causes the efficiency of whole system
Reduction.Therefore, on the premise of temperature in use is met, the anti-icing fluid that should be tried one's best using low concentration, play saving operating cost and
Protective conduit, the effect for preventing corrosion.
The content of the invention
In view of this, the utility model is directed to a kind of low temperature unit secondary refrigerant concentration on-line detecting system, to solve
The detection time length that exists during periodically being detected to refrigerating medium, inconvenient operation, feedback speed are slow and to refrigerating
The problem of agent concentration is controlled not in time.
To reach above-mentioned purpose, what the technical solution of the utility model was realized in：
A kind of low temperature unit secondary refrigerant concentration on-line detecting system, includes compressor, condenser, the section of closed-loop path connection
Device and evaporator are flowed, the evaporator includes refrigerating medium entrance and refrigerating medium is exported, refrigerating medium entrance and the refrigerating medium outlet
It is connected by pipeline with refrigerating medium water tank, the pipeline between the refrigerating medium entrance and refrigerating medium water tank is examined online provided with concentration
Survey module, the concentration on-line checking module include densimeter and detection valve, the densimeter, detection valve respectively with PLC
Control module is connected, and PLC control modules are connected with refrigerating medium water tank and operation main frame respectively.
Further, the refrigerating medium outlet is provided with temp probe, and the temp probe is connected with PLC control modules.
Further, the refrigerating medium water tank is provided with anti-icing fluid recuperation valve and refrigerating medium recuperation valve, and the anti-icing fluid is mended
The controlling switch for repaying valve and refrigerating medium recuperation valve is connected with PLC control modules respectively.
Further, it is in parallel on the pipeline between the refrigerating medium entrance and refrigerating medium water tank to be provided with concentration on-line checking mould
Block.
Further, connected on the pipeline between the refrigerating medium entrance and refrigerating medium water tank provided with concentration on-line checking mould
Block.
Further, the concentration on-line checking module also includes timer.
Further, the concentration on-line checking module and PLC control modules are integrated is arranged in detection case, the detection
Case includes the plug receptacle that is electrically connected, and the temp probe is connected by the plug receptacle that is electrically connected with PLC control modules, the anti-icing fluid recuperation valve
And the controlling switch of refrigerating medium recuperation valve is connected by the plug receptacle that is electrically connected with PLC control modules.
Further, the detection case is provided with siren, and the siren is connected with PLC control modules.
Further, the detection case is provided with display screen, and the display screen is connected with PLC control modules.
Further, the throttling arrangement is electric expansion valve or heating power expansion valve.
Relative to prior art, a kind of low temperature unit secondary refrigerant concentration on-line detecting system described in the utility model has
Following advantage：Refrigerating agent concentration can be detected in real time, it is not necessary to artificial periodic detection；Detection to refrigerating agent concentration is flexible, root
According to different operating conditions, scope can be manually set；Concentration Testing controls Integrated design with concentration, improves the timely of Concentration Testing
Property and security, so that the stabilization of host computer system, safe operation is effectively ensured.
Brief description of the drawings
Constitute a part of accompanying drawing of the present utility model to be used for providing further understanding to of the present utility model, this practicality is new
The schematic description and description of type is used to explain the utility model, does not constitute to improper restriction of the present utility model.
In accompanying drawing：
Fig. 1 is that a kind of structure of low temperature unit secondary refrigerant concentration on-line detecting system described in the utility model embodiment is shown
It is intended to.
Description of reference numerals：
1- compressors；2- condensers；4- throttling arrangements；5- evaporators；6- refrigerating mediums are exported；7- refrigerating medium entrances；8- is dense
Spend on-line checking module；9-PLC control modules；10- refrigerating medium water tanks.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the utility model can
To be mutually combined.
In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " on ", " under ",
The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of description the utility model and simplifies description, rather than indicate
Or imply that the device or element of meaning must have specific orientation, with specific azimuth configuration and operation, therefore be not understood that
For to limitation of the present utility model.In addition, term " first ", " second " etc. are only used for describing purpose, and it is not intended that indicating
Or imply relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, " first ", " second " etc. are defined
Feature can express or implicitly include one or more this feature.In description of the present utility model, unless separately
It is described, " multiple " are meant that two or more.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, on being understood by concrete condition
State concrete meaning of the term in the utility model.
1 and describe the utility model in detail in conjunction with the embodiments below with reference to the accompanying drawings.
The utility model provides a kind of low temperature unit secondary refrigerant concentration on-line detecting system, as shown in figure 1, including closing back
Compressor 1, condenser 2, throttling arrangement 4 and the evaporator 5 of road connection, the evaporator 5 includes refrigerating medium entrance 7 and refrigerating medium goes out
Mouthfuls 6, refrigerating medium entrance 7 and the refrigerating medium outlet 6 is connected by pipeline with refrigerating medium water tank 10, the refrigerating medium entrance 7 and
Pipeline between refrigerating medium water tank 10 is provided with concentration on-line checking module 8, and the concentration on-line checking module 8 includes densimeter
And detection valve, the densimeter, detection valve be connected respectively with PLC control modules 9, PLC control modules 9 respectively with refrigerating medium
Water tank 10 and operation main frame connection.
The leaving water temperature of low temperature unit is general relatively low, it is necessary to add the anti-icing fluid such as ethylene glycol or sodium chloride, calcium chloride to drop
The freezing point of low refrigerating medium, prevents refrigerating medium from freezing, and the freezing point of the refrigerating medium of various concentrations is different, in order to ensure unit just
Often operation, therefore, to assure that the concentration of refrigerating medium is in the range of presetting, and refrigerating medium concentration meeting in unit running process
Change, so needing that periodically refrigerating agent concentration is detected and adjusted.
The refrigerating medium outlet 6 is provided with temp probe, and the temp probe is connected with PLC control modules 9.PLC controls mould
Block 9 can obtain the temperature of refrigerating medium outlet 6, the convenient control according to temperature difference adjustment to concentration in real time.
The refrigerating medium water tank 10 is provided with anti-icing fluid recuperation valve and refrigerating medium recuperation valve, the anti-icing fluid recuperation valve and load
The controlling switch of cryogen recuperation valve is connected with PLC control modules 9 respectively.
When refrigerating agent concentration is relatively low, refrigerating medium easily freezes, and causes the heat exchanger tube bursting by freezing of evaporator 5, and then cause operation
Hostdown；
When refrigerating agent concentration is higher, the heat-transfer capability of refrigerating medium is poor, and viscosity is higher, causes the power consumption of pump and increases, is
The operating efficiency reduction of system.
When concentration value is less than minimum setting value, the power supply of the main frame out of service of PLC control modules 9, and provide alarm and carry
Show, so as to prevent refrigerating medium from freezing, protect the heat exchanger tube of evaporator 5 not by bursting by freezing, it is ensured that operation main frame operation safety.
When concentration value is higher than highest setting value, the power supply of the main frame out of service of PLC control modules 9, and provide alarm and carry
Show, so as to prevent the power consumption of excessive concentration influence heat transfer and increase pump.
When concentration value is less than minimum setting value, PLC control modules 9 open the controlling switch of anti-icing fluid recuperation valve, supplement
Quantitative anti-icing fluid, improves the concentration of refrigerating medium, releases alarm and the operation for the main frame that resumes operation.
When concentration value is higher than highest setting value, PLC control modules 9 open the controlling switch of refrigerating medium recuperation valve, supplement
Quantitative refrigerating medium, reduces the concentration of refrigerating medium, releases alarm and the operation for the main frame that resumes operation.
It is in parallel on pipeline between the refrigerating medium entrance 7 and refrigerating medium water tank 10 to be provided with concentration on-line checking module 8.For
Ensure that concentration on-line checking module 8 does not influence the overall operation of system, concentration on-line checking module 8 is connected in parallel on entering for refrigerating medium
On mouth pipeline, the concentration of secondary refrigerant system is detected in real time, and refrigerating medium concentration signal is converted into telecommunications by concentration on-line checking module 8
Number, electric signal is sent to PLC control modules 9 and is controlled.
Connected on pipeline between the refrigerating medium entrance 7 and refrigerating medium water tank 10 provided with concentration on-line checking module 8.
The concentration on-line checking module 8 also includes timer.
The concentration on-line checking module 8 and PLC control modules 9 are integrally disposed in detection case, and the detection case includes
Be electrically connected plug receptacle, and the temp probe is connected by the plug receptacle that is electrically connected with PLC control modules 9, the anti-icing fluid recuperation valve and load
The controlling switch of cryogen recuperation valve is connected by the plug receptacle that is electrically connected with PLC control modules 9.
The detection case is provided with siren, and the siren is connected with PLC control modules 9.
The detection case is provided with display screen, and the display screen is connected with PLC control modules 9.
The throttling arrangement 4 is electric expansion valve or heating power expansion valve.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Within the spirit and principle of utility model, any modification, equivalent substitution and improvements made etc. should be included in the utility model
Protection domain within.
Claims (10)
1. a kind of low temperature unit secondary refrigerant concentration on-line detecting system, including the compressor of closed-loop path connection, condenser, throttling
Device and evaporator, the evaporator includes refrigerating medium entrance and refrigerating medium is exported, and refrigerating medium entrance and the refrigerating medium outlet is logical
Pipeline is crossed to be connected with refrigerating medium water tank, it is characterised in that：Pipeline between the refrigerating medium entrance and refrigerating medium water tank is provided with
Concentration on-line checking module, the concentration on-line checking module includes densimeter and detection valve, the densimeter, detection valve
It is connected respectively with PLC control modules, PLC control modules are connected with refrigerating medium water tank and operation main frame respectively.
2. a kind of low temperature unit secondary refrigerant concentration on-line detecting system according to claim 1, it is characterised in that：It is described to carry
Cryogen outlet is provided with temp probe, and the temp probe is connected with PLC control modules.
3. a kind of low temperature unit secondary refrigerant concentration on-line detecting system according to claim 1, it is characterised in that：It is described to carry
Cryogen water tank is provided with anti-icing fluid recuperation valve and refrigerating medium recuperation valve, the control of the anti-icing fluid recuperation valve and refrigerating medium recuperation valve
Switch is connected with PLC control modules respectively.
4. a kind of low temperature unit secondary refrigerant concentration on-line detecting system according to claim 1, it is characterised in that：It is described to carry
It is in parallel on pipeline between cryogen entrance and refrigerating medium water tank to be provided with concentration on-line checking module.
5. a kind of low temperature unit secondary refrigerant concentration on-line detecting system according to claim 1, it is characterised in that：It is described to carry
Connected on pipeline between cryogen entrance and refrigerating medium water tank provided with concentration on-line checking module.
6. a kind of low temperature unit secondary refrigerant concentration on-line detecting system according to claim 1, it is characterised in that：It is described dense
Spending on-line checking module also includes timer.
7. a kind of low temperature unit secondary refrigerant concentration on-line detecting system according to claim 1, it is characterised in that：It is described dense
Degree on-line checking module and PLC control modules are integrated is arranged in detection case, the detection case includes the plug receptacle that is electrically connected, and temperature is visited
Head is connected by the plug receptacle that is electrically connected with PLC control modules, and the controlling switch of anti-icing fluid recuperation valve and refrigerating medium recuperation valve passes through electricity
Connection socket is connected with PLC control modules.
8. a kind of low temperature unit secondary refrigerant concentration on-line detecting system according to claim 7, it is characterised in that：The inspection
Measuring tank is provided with siren, and the siren is connected with PLC control modules.
9. a kind of low temperature unit secondary refrigerant concentration on-line detecting system according to claim 7, it is characterised in that：The inspection
Measuring tank is provided with display screen, and the display screen is connected with PLC control modules.
10. a kind of low temperature unit secondary refrigerant concentration on-line detecting system according to claim 1, it is characterised in that：It is described
Throttling arrangement is electric expansion valve or heating power expansion valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621254490.9U CN206410384U (en) | 2016-11-18 | 2016-11-18 | A kind of low temperature unit secondary refrigerant concentration on-line detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621254490.9U CN206410384U (en) | 2016-11-18 | 2016-11-18 | A kind of low temperature unit secondary refrigerant concentration on-line detecting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206410384U true CN206410384U (en) | 2017-08-15 |
Family
ID=59548448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621254490.9U Active CN206410384U (en) | 2016-11-18 | 2016-11-18 | A kind of low temperature unit secondary refrigerant concentration on-line detecting system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110514617A (en) * | 2018-05-22 | 2019-11-29 | 泰科电子(上海)有限公司 | Concentration detection apparatus, concentration measurement and control device and solar water heater |
| CN110514616A (en) * | 2018-05-22 | 2019-11-29 | 泰科电子(上海)有限公司 | Concentration detection apparatus, concentration measurement and control device and solar water heater |
| CN110514624A (en) * | 2018-05-22 | 2019-11-29 | 泰科电子(上海)有限公司 | Concentration detection apparatus, concentration measurement and control device and solar water heater |
-
2016
- 2016-11-18 CN CN201621254490.9U patent/CN206410384U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110514617A (en) * | 2018-05-22 | 2019-11-29 | 泰科电子(上海)有限公司 | Concentration detection apparatus, concentration measurement and control device and solar water heater |
| CN110514616A (en) * | 2018-05-22 | 2019-11-29 | 泰科电子(上海)有限公司 | Concentration detection apparatus, concentration measurement and control device and solar water heater |
| CN110514624A (en) * | 2018-05-22 | 2019-11-29 | 泰科电子(上海)有限公司 | Concentration detection apparatus, concentration measurement and control device and solar water heater |
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