CN106440577A - Refrigerant purifying device and purifying method - Google Patents
Refrigerant purifying device and purifying method Download PDFInfo
- Publication number
- CN106440577A CN106440577A CN201611141260.6A CN201611141260A CN106440577A CN 106440577 A CN106440577 A CN 106440577A CN 201611141260 A CN201611141260 A CN 201611141260A CN 106440577 A CN106440577 A CN 106440577A
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- Prior art keywords
- container
- pressure value
- refrigerant
- cold
- producing medium
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Classifications
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- 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
- F25B45/00—Arrangements for charging or discharging refrigerant
-
- 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
- F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
- F25B2345/002—Collecting refrigerant from a cycle
Abstract
The invention discloses a refrigerant purifying device and a refrigerant purifying method. The method comprises the following steps: exhausting air or other gases in a container; placing a recycled refrigerant in the container; standing the container in a constant-temperature environment; if a pressure value of the container is greater than a theoretical pressure value of the refrigerant under the ambient temperature, indicating that the refrigerant is mixed with the air; opening an exhaust valve, releasing part gas in the container, and closing the exhaust valve when the detected container pressure is equal to the theoretical pressure value; vaporizing the refrigerant in the container, separating the vaporized refrigerant from various impurities, drying, and filtering; during a vaporizing process, when the detected pressure value in the container is lower than the theoretical pressure value, indicating that the volatilizing of the refrigerant is completed; opening a blow-down valve to discharge the various of impurities. The invention also provides the refrigerant purifying device. Through the refrigerant purifying device and the refrigerant purifying method, on one hand, the recovery rate of the refrigerant can be improved; on the other hand, the impurities can be removed thoroughly, and the refrigerant cannot be lost, so that materials are saved, and the production cost is greatly reduced.
Description
Technical field
The present invention relates to refrigerant-recovery utilizes technology, particularly a kind of refrigerant purification device and purification method.
Background technology
When refrigeration unit is when scrapping, safeguarding or occurring the phenomenons such as accident, cold-producing medium will be often reclaimed.But returned
The cold-producing medium of receipts will bring problems with：
1. the cold-producing medium for reclaiming usually contains oils and fatss or other liquid, affects heat exchange, makes thermal conversion efficiency low；
2. the cold-producing medium for reclaiming usually contains mechanical admixture, can block expansion valve, machine set filter, or even damage compressor；
3. the cold-producing medium for reclaiming usually contains moisture, can produce ice and block up, or blocking expansion valve, machine set filter etc., or even with
Cold-producing medium reacts, and produces acidic materials and corrodes unit；
4. the cold-producing medium for reclaiming usually contains air, can cause vaporizer, condenser cannot normal output and efficiency decline, or even
Unit superpressure causes other accidents to occur.
Content of the invention
The purpose of the present invention is to overcome the above-mentioned not enough of prior art and provide a kind of good purification, response rate height, section
About the refrigerant purification device of cost and purification method.
The technical scheme is that：
A kind of refrigerant purification method of the present invention, comprises the following steps：
Step 1：Evacuation, excludes the air in container or other gases；
Step 2：The cold-producing medium of recovery is placed in container, container is stood and is under isoperibol, the pressure in detection container
Force value, if the pressure value of container is more than cold-producing medium theoretical pressure value at this ambient temperature, illustrates that cold-producing medium is mixed with air；
Step 3：Air bleeding valve is opened, the portion gas in container are discharged, the container pressure that measures to be checked is equal to the reason under ambient temperature
During by pressure value, air bleeding valve is closed；
Step 4：Outlet valve is opened, the cold-producing medium in container is vaporized, so that the cold-producing medium of vaporization is separated with various impurity；Right
The cold-producing medium of vaporization is dried filtration, obtains pure cold-producing medium and is recycled；
Step 5：In vaporescence, when the theoretical pressure value that the pressure value in container is less than under ambient temperature is detected, then say
Bright cold-producing medium volatilization is finished；For, under barotropic condition, closing outlet valve, quitting work in holding container；
Step 6：Blowoff valve is opened, and various impurity is discharged using above-mentioned malleation, is then shut off valve.
Further, step 3 is specifically included：During discharge gas, the pressure value for first allowing in container is slightly below the constant temperature
Whether the theoretical pressure value under environment, after temperature reaches the isoperibol in step 2 again, detect the pressure value after constant temperature etc.
Theoretical pressure value under the isoperibol, if being equal to, illustrates that the gas in container is excluded, now exhaust valve closure；If
Pressure value after constant temperature remains above theoretical pressure value, then continue aforesaid operations, until pressure value is equal to theoretical pressure value, the row of closing
Air valve.
Further, in step 5, in the holding container for malleation specially holding container pressure value superatmospheric 1.5 ~
2 times.
A kind of refrigerant purification device of the present invention, including：
Container, for holding cold-producing medium；
Pressure transducer, on container, for the pressure in detection container；
Temperature probe, on container, for detecting refrigerant temperature；
Air vent, on container, for discharging the gas in container；Air vent connects air bleeding valve by pipeline；
Charging/discharging opening, on container, for adding cold-producing medium or isolating the cold-producing medium of vaporization into container；Charging/
Discharging opening is also sequentially connected device for drying and filtering and refrigeration unit through charging/outlet valve；
Sewage draining exit, located at the bottom of container, for discharging impurity, sewage draining exit connects blowoff valve by pipeline.
Further, also include controller, for controlling air bleeding valve, charging/outlet valve, being turned on and off of blowoff valve, with
And the container pressure for detecting pressure transducer is made comparisons with the theoretical pressure value of container, controls each valve event.
Further, the device for drying and filtering includes housing, and the both sides of housing are respectively intake screen and outlet filter screen, housing
Desiccant is inside filled with, end cap on housing, is additionally provided with, end cap is Demountable, by sealing between sealing member and housing.
Further, the desiccant is particle silica gel, molecular sieve, activated alumina, activated carbon and its any mixture.
Further, the aperture of the outlet filter screen is less than or equal to the aperture of intake screen.
Further, the aperture of the intake screen and outlet filter screen is less than the particle diameter of desiccant.
Further, the aperture of the intake screen and/or outlet filter screen is 40 ~ 120 mesh.
Beneficial effects of the present invention：
（1）Temperature and pressure value comparison table of the present invention according to corresponding to cold-producing medium excluding air, good purification, and will not
Loss cold-producing medium；
（2）By first excluding air, then by being vaporized to cold-producing medium, dry and filter reclaiming cold-producing medium, one side energy
The response rate of cold-producing medium is enough improved；On the other hand, can thoroughly remove impurity, and cold-producing medium will not be lost, save material, substantially reduce
Production cost；
（3）The structure design of device for drying and filtering can thoroughly filter the impurity in cold-producing medium, in case the cold-producing medium of vaporization carries one
Oarse-grained impurity enters cold-producing medium group a bit, and greatly improves the response rate of cold-producing medium.
Description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention；
Fig. 2 is the structural representation of embodiment of the present invention device for drying and filtering.
Specific embodiment
Below with reference to Figure of description and specific embodiment, the present invention is described in further details.
As shown in Figure 1：A kind of refrigerant purification device, including container 1, the top of container 1 is provided with charging/discharging opening, pressure
Power table 12 and air vent, the bottom of container 1 is provided with sewage draining exit, and the inner chamber of container 1 is used for holding the cold-producing medium with impurity, impurity
Predominantly mechanical admixture, moisture, air, oils and fatss or other liquid, due to their density and vary in weight, when being placed in container
After can produce layering.Pressure gauge 12 is used for the pressure in detection container 1.Air vent is used for discharging the gas in container, air vent
Air bleeding valve 13 is connected by pipeline.Charging/discharging opening be a bore, can both discharge can also feeding, be mainly used in appearance
Cold-producing medium is added in device or isolate the cold-producing medium of vaporization；Charging/discharging opening is also sequentially connected drying through charging/outlet valve 11
Filter 2 and refrigeration unit 3.Sewage draining exit is used for discharging impurity, and sewage draining exit connects blowoff valve 14 by pipeline.Device for drying and filtering 2
The pump housing 3 is provided between refrigeration unit, is pumped in refrigeration unit for the cold-producing medium after filtering drying in device for drying and filtering 2
Recycle.
Wherein, air vent also acts as bleeding point, for connecting vacuum pump component, in container for the first time using front, Huo Zherong
When other gases are entered in device, first evacuation, then place cold-producing medium, to avoid cold-producing medium from being mixed into air or other gases, shadow
Ring the accuracy of detection.
The side of container 1 is provided with temperature probe 15, for detecting refrigerant temperature.Temperature probe can be thermometer,
Can be temperature sensor, the present embodiment is preferably temperature sensor, achievable Intelligent Measurement.
The present embodiment also includes controller, for control air bleeding valve 13, charging/outlet valve 11, the unlatching of blowoff valve 14 or
Close, and the container pressure for detecting pressure gauge 12 is made comparisons with the theoretical pressure value of cold-producing medium, controls each valve
Door action；The outfan connection air bleeding valve 13 of controller, charging/outlet valve 11, blowoff valve 14, the input connection pressure of controller
Power table 12 and temperature sensor.
As shown in Figure 2：In the present embodiment, device for drying and filtering 2 includes housing 21, and the both sides of housing 21 are respectively intake screen
22 and outlet filter screen 23, desiccant being filled with housing 21, is additionally provided with end cap 24 on housing 21, end cap 24 passes through 25 He of securing member
Sealing member 26 is tightly connected with housing 21, and can be dismantled end cap by 25, is conveniently replaceable desiccant.Securing member 25 is preferably
Bolt is fastened, and sealing member 26 is sealing ring.
The desiccant of the present embodiment is graininess discoloration silica gel, about 5 kilograms of the weight of the silica gel that changes colour, and discoloration silica gel is being used
Before need to be toasted in drying baker so as to be changed into blue, you can come into operation, used time closed preservation does not avoid water suction.Work as silicon
After glue is using reddening, can further take out and be toasted, Reusability, cost-effective.
In order to improve filter effect, the aperture of intake screen 22 is preferably 100 mesh, and the aperture for exporting filter screen 23 is preferably 50
Mesh.And the aperture of intake screen 22 and outlet filter screen 23 is respectively less than the particle diameter of silica gel.Why the aperture of outlet filter screen 23 is set
Count into the aperture less than intake screen 22, be in order to thoroughly filter the impurity in cold-producing medium, in order to avoid vaporization cold-producing medium carry one
Oarse-grained impurity enters cold-producing medium group a bit, if intake screen 22 is less with what the aperture of outlet filter screen 23 was all designed, can increase
Material cost, if the aperture design of intake screen becomes the aperture less than outlet filter screen, can reduce the response rate of cold-producing medium.This enforcement
In example, intake screen and outlet filter screen are stainless steel filtering net.
A kind of purification method of refrigerant purification device, comprises the following steps：
S301：Evacuation, excludes the air in container or other gases.
Specifically, in container for the first time using front, or when entering other gases in container, first evacuation, then place
Cold-producing medium, to avoid cold-producing medium from being mixed into air or other gases, affects the accuracy of detection.The present embodiment be using air vent as
Bleeding point is used, and accesses vacuum pump, is opened by controlling air bleeding valve, to container vacuum-pumping.
S302：The cold-producing medium of recovery is placed in container, cold-producing medium and its impurity are layered in container.
Specifically, mechanical admixture, moisture, air, oils and fatss or other liquid, machine are typically contained inside the cold-producing medium of recovery
Tool impurity and heavy liquid can be sunken to the bottom of container；Lubricant grease often dissolves in the refrigerant, and part is insoluble to be become because of which
Divide difference, the water surface may be swum in, or is suspended in more than cold-producing medium liquid level and below the water surface, it is also possible at cold-producing medium bottom
Portion；And the density of water is generally little than the density of liquid refrigerant, therefore water is placed in the upper strata of liquid refrigerant；And oils and fatss or liquid
It is also possible in cold-producing medium to contain minor amount of water；Vapor phase refrigerant, micro water vapor and air then float the upper strata in container, this enforcement
The cold-producing medium of example is preferably R134a cold-producing medium.
S303：Container is stood and is under isoperibol, the pressure value in detection container, if the pressure value of container is more than
Cold-producing medium theoretical pressure value at this ambient temperature, then be mixed with air in explanation container.
Specifically, as air floats the upper strata in container, therefore will first air-out.Concrete principle is：Due to various
Cold-producing medium is all to having temperature and pressure value comparison table, such as R134a cold-producing medium, and different temperature correspond to different pressure value, at certain
Pressure value corresponding thereto is certainly existed under one stationary temperature, therefore, cold-producing medium is corresponding under a certain steady temperature
Pressure value be considered as theoretical pressure value, the basis for estimation being used as in container with the presence or absence of gas, i.e., when the pressure value of container is big
In which during theoretical pressure value under the isoperibol, then explanation cold-producing medium is mixed with air.Certainly, container is holding the system of recovery
Before cryogen, its inner chamber will keep vacuum environment, otherwise cause detection inaccurate.For example, R134a cold-producing medium is at 35 DEG C of constant temperature,
Its pressure value is 886.82KPa, and the value is considered as theoretical pressure value；If container is placed under 35 DEG C of constant temperature, the pressure for detecting
Value is then mixed with air in explanation cold-producing medium more than 886.82KPa.
S304：Air bleeding valve is opened, the portion gas in container are discharged, the container pressure that measures to be checked is equal under ambient temperature
During theoretical pressure value, air bleeding valve is closed.
Specifically, when the pressure value that pressure transducer detects container is more than the theoretical pressure value under ambient temperature, send out
The number of delivering letters gives controller, and controller control air bleeding valve is opened, and discharges gas, and the valve opening of air bleeding valve is adjustable, and then controls
The flow of gas.During discharge gas, the pressure value for first allowing in container is slightly below the theoretical pressure value under ambient temperature, this
It is because that container can be lowered the temperature when deflating, and after lowering the temperature, pressure slightly can declines, after the ambient temperature that temperature reaches early stage again,
Whether the pressure value that is observed in container again is equal to theoretical pressure value, if being equal to, illustrates to exclude gas in container, this time control
Device processed controls exhaust valve closure；If pressure value remains above theoretical pressure value, continue aforesaid operations, until pressure value is equal to theory
Pressure value, closes air bleeding valve.
S305：Charging/outlet valve is opened, the cold-producing medium in container is vaporized, so that cold-producing medium is separated with various impurity,
Filtration is dried to the cold-producing medium for vaporizing, and is recycled.
Specifically, if the water for being first opposite to liquid refrigerant upper strata is filtered, that is, water is allowed directly to enter dried
Filter, as aqueous water is more, then can waste substantial amounts of desiccant, greatly improve production cost.Therefore the present embodiment selects right
Cold-producing medium is vaporized, and cold-producing medium will be vaporized, and at a temperature of this, water will not be vaporized, and oils and fatss are more difficult to vaporization than water.?
Vaporization front opening charging/outlet valve, so, the cold-producing medium after vaporization can carry a small amount of vapor and enter through charging/discharging opening
Filter dryer, after device for drying and filtering absorption micro water vapor, obtains pure and dried cold-producing medium.Cold-producing medium can be pumped into
Refrigeration unit is utilized, and is such as connected device for drying and filtering with refrigeration unit by the pump housing, and is filtered by Filter dryer
A small amount of vapor, greatly improves the service life of desiccant, cost-effective.
S306：In vaporescence, pressure value under real-time detection isoperibol in container, when the pressure value in container is less than
During theoretical pressure value under ambient temperature, then cold-producing medium volatilization is finished；While being malleation in holding container, charging/discharging is closed
Valve；
Specifically, when the pressure value in container is less than cold-producing medium theoretical pressure value at ambient temperature, in container just not
Meeting aerofluxuss again, illustrate that cold-producing medium volatilizees and finish；Why some malleations are retained, partly in order to can will be residual in container
The steam that stays is discharged, on the other hand, be in order to prevent air from entering container.When detecting the pressure superatmospheric in container
When 1.5 times, charging/outlet valve is closed.
S307：Open blowoff valve and discharge various impurity.
Specifically, blowoff valve is opened, mechanical admixture, moisture, oils and fatss and other liquid of bottom can be discharged, during discharge,
Holding container pressure superatmospheric, to avoid inclusion of air, impact is follow-up to be used, and when using next time, can save operation stream
Journey.
Claims (10)
1. a kind of refrigerant purification method, it is characterised in that comprise the following steps：
Step 1：Evacuation, excludes the air in container or other gases；
Step 2：The cold-producing medium of recovery is placed in container, container is stood and is under isoperibol, the pressure in detection container
Force value, if the pressure value of container is more than cold-producing medium theoretical pressure value at this ambient temperature, illustrates that cold-producing medium is mixed with air；
Step 3：Air bleeding valve is opened, the portion gas in container are discharged, the container pressure that measures to be checked is equal to the reason under ambient temperature
During by pressure value, air bleeding valve is closed；
Step 4：Outlet valve is opened, the cold-producing medium in container is vaporized, so that the cold-producing medium of vaporization is separated with various impurity；Right
The cold-producing medium of vaporization is dried filtration, obtains pure cold-producing medium and is recycled；
Step 5：In vaporescence, when the theoretical pressure value that the pressure value in container is less than under ambient temperature is detected, then say
Bright cold-producing medium volatilization is finished；For, under barotropic condition, closing outlet valve, quitting work in holding container；
Step 6：Blowoff valve is opened, and various impurity is discharged using above-mentioned malleation, is then shut off valve.
2. the purification method of refrigerant purification device according to claim 1, it is characterised in that step 3 is specifically included：In row
During deflation body, the theoretical pressure value that the pressure value that first allows in container is slightly below under the isoperibol, treat that temperature reaches again
After isoperibol in step 2, the theoretical pressure the value whether pressure value after constant temperature is equal under the isoperibol is detected, if waiting
In then the gas in explanation container is excluded, now exhaust valve closure；If the pressure value after constant temperature remains above theoretical pressure value,
Then continue aforesaid operations, until pressure value is equal to theoretical pressure value, close air bleeding valve.
3. the purification method of refrigerant purification device according to claim 1 or claim 2, it is characterised in that in step 5, the guarantor
Holding in container 1.5 ~ 2 times of holding container pressure value superatmospheric is specially for malleation.
4. a kind of refrigerant purification device, it is characterised in that include：
Container, for holding cold-producing medium；
Pressure transducer, on container, for the pressure in detection container；
Temperature probe, on container, for detecting refrigerant temperature；
Air vent, on container, for discharging the gas in container；Air vent connects air bleeding valve by pipeline；
Charging/discharging opening, on container, for adding cold-producing medium or isolating the cold-producing medium of vaporization into container；Charging/
Discharging opening is also sequentially connected device for drying and filtering and refrigeration unit through charging/outlet valve；
Sewage draining exit, located at the bottom of container, for discharging impurity, sewage draining exit connects blowoff valve by pipeline.
5. refrigerant purification device according to claim 4, it is characterised in that also include controller, for controlling aerofluxuss
Valve, charging/outlet valve, being turned on and off of blowoff valve, and the container pressure for detecting pressure transducer and container
Theoretical pressure value make comparisons, control each valve event.
6. the refrigerant purification device according to claim 4 or 5, it is characterised in that the device for drying and filtering includes housing,
The both sides of housing are respectively intake screen and outlet filter screen, be filled with desiccant, be additionally provided with end cap on housing in housing, and end cap is
Demountable, by sealing between sealing member and housing.
7. refrigerant purification device according to claim 6, it is characterised in that the desiccant is particle silica gel, point
Sub- sieve, activated alumina, activated carbon and its any mixture.
8. refrigerant purification device according to claim 6, it is characterised in that the aperture of the outlet filter screen less than or wait
Aperture in intake screen.
9. refrigerant purification device according to claim 6, it is characterised in that the hole of the intake screen and outlet filter screen
Footpath is less than the particle diameter of desiccant.
10. refrigerant purification device according to claim 9, it is characterised in that the intake screen and/or outlet filter screen
Aperture be 40 ~ 120 mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611141260.6A CN106440577A (en) | 2016-12-12 | 2016-12-12 | Refrigerant purifying device and purifying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611141260.6A CN106440577A (en) | 2016-12-12 | 2016-12-12 | Refrigerant purifying device and purifying method |
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| CN106440577A true CN106440577A (en) | 2017-02-22 |
Family
ID=58216428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201611141260.6A Pending CN106440577A (en) | 2016-12-12 | 2016-12-12 | Refrigerant purifying device and purifying method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113695980A (en) * | 2021-08-06 | 2021-11-26 | 珠海格力智能装备有限公司 | Purification mechanism, cooling machine and purification detection method |
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Application publication date: 20170222 |