CN105371541A - Refrigerant injection device and refrigerant injection method - Google Patents
Refrigerant injection device and refrigerant injection method Download PDFInfo
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- CN105371541A CN105371541A CN201410432098.8A CN201410432098A CN105371541A CN 105371541 A CN105371541 A CN 105371541A CN 201410432098 A CN201410432098 A CN 201410432098A CN 105371541 A CN105371541 A CN 105371541A
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- refrigerant
- injection device
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- mass flowmenter
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Abstract
The invention discloses a refrigerant injection device and a refrigerant injection method. The refrigerant injection device comprises a controller and a refrigerant punching injecting pipeline system. The pipeline system comprises a vacuum pipe connected through a pipeline, a refrigerant tank storing refrigerant, an electromagnetic valve and a mass flow meter. The first end of the electromagnetic valve is connected to the refrigerant tank. The second end of the electromagnetic valve is connected to the first end of the mass flow meter. The second end of the mass flow meter is connected to a device where the refrigerant needs to be injected. The second end of the mass flow meter is further connected with the vacuum pump. The controller is electrically connected with the electromagnetic valve, the mass flow meter and the vacuum pump. According to the refrigerant injection device, the purpose of controlling the refrigerant injection mass can be achieved through linkage of the mass flow meter, the electromagnetic valve and a programmable logic controller (PLC), and precision and repeatability are high.
Description
Technical field
The present invention relates to refrigerated air-conditioning system, equipment de-sign manufactures field, more particularly, the present invention relates to a kind of refrigerant injection device and refrigerant method for implanting.
Background technology
Refrigerant (also known as cold-producing medium) is in refrigerating and air conditioning system, in order to transferring heat energy, produces the working fluid of refrigerating effect.In test production process, pressure-viscosity-temperature (PVT) test carrying out refrigerant and refrigerator oil mixture is generally needed to measure.PVT tests measurement mechanism to be needed to have noted in the high-pressure balancing chamber of refrigerator oil in punching to inject refrigerant, and actual refrigerant quality of injecting needs to be controlled and record.
But the equilibrium still due to trial body is provided with comparatively multi-pipeline and sensor, and be fixed in high/low temperature alternation case, so weight method conventional in prior art is not suitable for this device, and weigh and the mode quality error of manual-lock input lock larger.
Summary of the invention
Technical problem to be solved by this invention is for there is above-mentioned defect in prior art, provides a kind of refrigerant injection device and the refrigerant method for implanting that effectively can control refrigerant implantation quality.
In order to realize above-mentioned technical purpose, according to a first aspect of the invention, provide a kind of refrigerant injection device, comprise: controller and the refrigerant punching note pipe-line system controlled by controller, described pipe-line system comprises the vavuum pump connected by pipeline, the refrigerant tank storing refrigerant, magnetic valve and mass flowmenter; Wherein, the first end of magnetic valve is connected to refrigerant tank; Second end of magnetic valve is connected to the first end of mass flowmenter; Second end of mass flowmenter is connected to refrigerant device to be implanted; Second end of mass flowmenter is also connected with vavuum pump; Described controller is electrically connected with magnetic valve, mass flowmenter and vavuum pump respectively.
Preferably, refrigerant device to be implanted is arranged in insulating box.
Preferably, refrigerant device to be implanted is autoclave; Be provided with closed high-pressure balancing chamber in described autoclave, in high-pressure balancing chamber, pre-subpunch injects a certain amount of refrigerator oil.
Preferably, the pipeline between refrigerant tank and the first end of magnetic valve is connected with capillary and refrigerant gasification vessel; The first end of described capillary is connected with refrigerant tank, and the second end of capillary is connected to the first end of refrigerant gasification vessel; Second end of refrigerant gasification vessel is connected to magnetic valve first end.
Preferably, the pipeline between vavuum pump and the second end of mass flowmenter is connected with vacuum meter; Pipeline between second end of described mass flowmenter and refrigerant device to be implanted is connected with Pressure gauge.
Preferably, the pipeline being close to described refrigerant tank is provided with the first valve; The 4th valve is provided with between second end of mass flowmenter and Pressure gauge; 4th is provided with the second valve between valve and vacuum meter, be provided with the 3rd valve between Pressure gauge and refrigerant device to be implanted.
Preferably, the first valve, the second valve, the 3rd valve and the 4th valve are manual ball valves.
Preferably, controller is arranged in anti-explosion cabinet; Described anti-explosion cabinet also comprises the electrical connection circuit of controller and magnetic valve, mass flowmenter and vavuum pump; Described refrigerant punching note pipe-line system is installed in refrigerant cabinet.
Preferably, controller is programmable logic controller (PLC).
According to a second aspect of the invention, provide a kind of refrigerant method for implanting, have employed above-mentioned refrigerant injection device, it is characterized in that comprising: first utilize the pipeline of vavuum pump to whole refrigerant injection device to vacuumize; After the pipeline of refrigerant injected system reaches predetermined vacuum level, refrigerant is injected and the quality of the refrigerant utilizing the mass flow meter measurement of refrigerant injection device to inject to refrigerant injection device from the refrigerant tank storing refrigerant, when the refrigerant that measurement result display is injected reaches predetermined quality, mass flowmenter feeds back signal to controller, automatic control electric magnet valve shutdown system, stops injecting.
Refrigerant injection device provided by the invention can pass through the interlock of mass flowmenter, magnetic valve and programmable logic controller (PLC) (PLC), thus realizes the object controlling refrigerant implantation quality.Namely in process of the test mass flowmenter be not stressed, temperature or fluid state (gas phase or liquid phase) impact, not by external environment influence, precision and repeatability are very high, to obtain the injection ratio (oil adds the autoclave of PVT experimental rig in advance) of required system pressure and refrigerant/oil.
Accompanying drawing explanation
By reference to the accompanying drawings, and by reference to detailed description below, will more easily there is more complete understanding to the present invention and more easily understand its adjoint advantage and feature, wherein:
Fig. 1 schematically shows the structured flowchart of refrigerant injection device according to the preferred embodiment of the invention.
Fig. 2 schematically shows the schematic diagram of the major part of the pipeline of refrigerant injection device according to the preferred embodiment of the invention.
The PVT experimental provision refrigerant that Fig. 3 schematically shows refrigerant injection device according to the preferred embodiment of the invention injects schematic diagram.
It should be noted that, accompanying drawing is for illustration of the present invention, and unrestricted the present invention.Note, represent that the accompanying drawing of structure may not be draw in proportion.Further, in accompanying drawing, identical or similar element indicates identical or similar label.
Detailed description of the invention
In order to make content of the present invention clearly with understandable, below in conjunction with specific embodiments and the drawings, content of the present invention is described in detail.
The present invention devises a set of refrigerant injection device, complete the whole process of " vacuumize → refrigerant injects → reach fixed mass to be stopped injecting " wherein, and realize refrigerant quality accurately control and record by mass flowmenter, magnetic valve and programmable logic controller (PLC) (PLC).The preferred embodiments of the present invention will be specifically described below.
Fig. 1 schematically shows the structured flowchart of refrigerant injection device according to the preferred embodiment of the invention.
As shown in Figure 1, refrigerant injection device comprises according to the preferred embodiment of the invention: controller (such as programmable logic controller (PLC), not shown in Figure 1) and controlled by controller refrigerant punching note pipe-line system 400, described pipe-line system 400 comprises the vavuum pump 200 connected by pipeline, the refrigerant tank 100 storing refrigerant, magnetic valve 30 and mass flowmenter 40.
Refrigerant punching note pipe-line system 400 to be installed in refrigerant cabinet 300.
Controller is arranged in the anti-explosion cabinet of refrigerant cabinet 300 side, and anti-explosion cabinet establishes touch-screen.Controller is connected by electric wiring with magnetic valve 30, mass flowmenter 40 and vavuum pump 200 respectively, and main electric wiring is placed in anti-explosion cabinet.
Fig. 2 schematically shows the schematic diagram of the major part of the pipeline of refrigerant injection device according to the preferred embodiment of the invention.
As shown in Figure 2, refrigerant punching note pipe-line system 400 also comprises according to the preferred embodiment of the invention: capillary 10 and refrigerant gasification vessel 20.
Wherein, the first end of capillary 10 is connected with refrigerant tank 100 by the first hand-operated valve 1 (such as, manual ball valve), and the second end of capillary 10 is connected to the first end of refrigerant gasification vessel 20; Capillary 10 is for carrying out reduced pressure treatment to the refrigerant flowed into.
Second end of refrigerant gasification vessel 20 is connected to the first end of magnetic valve 30; Refrigerant gasification vessel 20 is for carrying out gasification process to the refrigerant flowed into.
Second end of magnetic valve 30 is connected to the first end of mass flowmenter 40; Magnetic valve 30 is for controlling connection and the cut out of refrigerant gasification vessel 20 to mass flowmenter 40.Mass flowmenter 40 is for measuring quality and the flow of the refrigerant flowed through.
Refrigerant punching note pipe-line system 400 also comprises according to the preferred embodiment of the invention: vacuum meter 210 and Pressure gauge 310.
Second end of mass flowmenter 40 is connected to Pressure gauge 310 by the 4th hand-operated valve 4 (such as, manual ball valve);
Second end of mass flowmenter 40 by the 4th hand-operated valve 4 and the second hand-operated valve 2 (such as, manual ball valve) be connected to vavuum pump 200 and vacuum meter 210, and the second end of mass flowmenter 40 is connected to refrigerant device to be implanted by the 4th hand-operated valve 4 and the 3rd hand-operated valve 3 (such as, manual ball valve).
Refrigerant device to be implanted is autoclave according to the preferred embodiment of the invention, is provided with closed high-pressure balancing chamber in autoclave, and in high-pressure balancing chamber, pre-subpunch injects a certain amount of refrigerator oil.
Preferably, autoclave is arranged in insulating box, is convenient to the temperature controlling high-pressure balancing chamber, maintains the low-temperature condition of autoclave.Added the refrigerant density in autoclave by the cooling (about-10 DEG C) to autoclave, ensure enough punching notes of refrigerant, also reduce the error that the remaining refrigerant of pipeline is brought into.
Specifically, the present invention can install anti-explosion cabinet in refrigerant cabinet side, and main electric part is placed in anti-explosion cabinet, and can be designed to utilize touch-screen to control electric part by controller.Even if pipeline leaks gas like this, also can avoid cold media gas (comprising the weak combustion gases such as R32) and the electrical contact of leakage as far as possible.
By adopting capillary decompression and refrigerant gasification vessel, ensure that refrigerant is that pure gas state is injected, reducing error.For mass flowmenter, neat liquid or gas can be detected comparatively accurately, but if the mixture of gas and liquid, precision significantly will decline.And for refrigerant, because boiling point own is lower, if wish that neat liquid injects, even if inject by the inverted mode of refrigerant tank 100, also may gasify in pipeline, become admixture.Therefore be designed to pure gas inject, in order to ensure that the process that refrigerant is injecting can not be mixed into drop, after refrigerant enters refrigerant injection device from refrigerant tank 100 along pipeline, first through capillary, capillary plays decompression gasification, then enter refrigerant gasification vessel (airtight container), ensure gasification further.
This refrigerant injection device be in essence one can precise hard_drawn tuhes inject refrigerant quality rush dispensing device, also can be used for, in other tests, in refrigerant injection device, reserving the corresponding interface, and control break-make with ball valve or other hand-operated valves.
Although be that example describes the present invention above with hand-operated valve, when full-automatic realization, the automatic valve that above-mentioned hand-operated valve can be controlled by controller replaces.
The PVT experimental provision refrigerant that Fig. 3 schematically shows refrigerant injection device according to the preferred embodiment of the invention injects schematic diagram.
First design and build above-mentioned refrigerant injection device (for double door injects cabinet), on inner panel and/or panel deployment tube road, both sides, refrigerant injection device integral arrangement as shown in Figure 1, first the pipeline of vavuum pump 200 to whole refrigerant injection device is utilized to vacuumize (deaeration, vacuum meter 210 shows the vacuum of pipeline); After the pipeline of refrigerant injected system reaches predetermined vacuum level, close the second hand-operated valve 2, now inject refrigerant and the quality of the refrigerant utilizing mass flowmenter 40 measurement of refrigerant injection device to inject from the refrigerant tank 100 storing refrigerant to refrigerant injection device, when the refrigerant that measurement result display is injected reaches predetermined quality, mass flowmenter feeds back signal to the controller of such as programmable logic controller (PLC) and so on, automatic control electric magnet valve shutdown system, stops injecting (stopping refrigerant from refrigerant tank 100 to the injection of refrigerant injection device).Thus, complete vacuumizing → refrigerant inject → reach predetermined quality stop inject process, thus by the interlock of mass flowmenter+PLC+ magnetic valve accurately control refrigerant inject quality.
More specifically, in refrigerant injection process, refrigerant enters refrigerant injection device by refrigerant tank, reduce pressure through capillary, and refrigerant gasification vessel ensure that the refrigerant of injection is all gaseous state (no liquid refrigerant), after refrigerant by mass flowmenter injection testing system (if PVT testing stand is autoclave, can utilize refrigeration system that autoclave is maintained predetermined low temperature level state), mass flowmenter to detect the quality by refrigerant in real time in this course, and feed back to controller, after reaching required quality, controller is by closed electromagnetic valve, thus terminate refrigerant injection process.
In concrete example, utilize refrigerant injection device to realize system and vacuumize and inject two processes with refrigerant.The actual refrigerant carrying out R410A, R22 injects test, and at ambient temperature, equilibrium still only can inject the refrigerant of about 20-30g after being filled with refrigerator oil 200ml.Then lowered the temperature by temperature-controlling system, 200g and more than 300g can be injected because the saturated vapor pressure difference of R410A, R22 is maximum respectively after cooling, and test refrigerator oil and be about 200g, the pressure-viscosity-temperature (PVT) that can meet refrigerant and refrigerator oil mixture measures the demand of test.
Ensure that refrigerant is that pure gas state is injected by capillary decompression and refrigerant gasification vessel above, and be further advanced by the enough punching notes cooling of equilibrium still being ensured to refrigerant, and reduce pipeline error.
Refrigerant injection device provided by the invention can pass through the interlock of mass flowmenter, magnetic valve and programmable logic controller (PLC) (PLC), thus realizes the object controlling refrigerant implantation quality.Namely in process of the test mass flowmenter be not stressed, temperature or fluid state (gas phase or liquid phase) impact, not by external environment influence, precision and repeatability are very high, to obtain the injection ratio (oil adds the autoclave of PVT experimental rig in advance) of required system pressure and refrigerant/oil.
Meanwhile, this refrigerant injection device be in essence one can precise hard_drawn tuhes inject refrigerant quality rush dispensing device, also can be used for, in other tests, in refrigerant injection device, reserving the corresponding interface, and controlling break-make with hand-operated valve.
In addition, it should be noted that, unless stated otherwise or point out, otherwise the term " first " in description, " second ", " the 3rd " etc. describe only for distinguishing each assembly, element, step etc. in description, instead of for representing logical relation between each assembly, element, step or ordinal relation etc.
Be understandable that, although the present invention with preferred embodiment disclose as above, but above-described embodiment and be not used to limit the present invention.For any those of ordinary skill in the art, do not departing under technical solution of the present invention ambit, the technology contents of above-mentioned announcement all can be utilized to make many possible variations and modification to technical solution of the present invention, or be revised as the Equivalent embodiments of equivalent variations.Therefore, every content not departing from technical solution of the present invention, according to technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belongs in the scope of technical solution of the present invention protection.
Claims (10)
1. a refrigerant injection device, is characterized in that comprising: controller and the refrigerant punching note pipe-line system controlled by controller, and described pipe-line system comprises the vavuum pump connected by pipeline, the refrigerant tank storing refrigerant, magnetic valve and mass flowmenter; Wherein, the first end of magnetic valve is connected to refrigerant tank; Second end of magnetic valve is connected to the first end of mass flowmenter; Second end of mass flowmenter is connected to refrigerant device to be implanted; Second end of mass flowmenter is also connected with vavuum pump; Described controller is electrically connected with magnetic valve, mass flowmenter and vavuum pump respectively.
2. refrigerant injection device according to claim 1, is characterized in that, described refrigerant device to be implanted is arranged in insulating box.
3. refrigerant injection device according to claim 2, is characterized in that, described refrigerant device to be implanted is autoclave; Be provided with closed high-pressure balancing chamber in described autoclave, in high-pressure balancing chamber, pre-subpunch injects a certain amount of refrigerator oil.
4. refrigerant injection device according to claim 1, is characterized in that, the pipeline between described refrigerant tank and the first end of magnetic valve is connected with capillary and refrigerant gasification vessel; The first end of described capillary is connected with refrigerant tank, and the second end of capillary is connected to the first end of refrigerant gasification vessel; Second end of refrigerant gasification vessel is connected to magnetic valve first end.
5. refrigerant injection device according to claim 1, is characterized in that, the pipeline between described vavuum pump and the second end of mass flowmenter is connected with vacuum meter; Pipeline between second end of described mass flowmenter and refrigerant device to be implanted is connected with Pressure gauge.
6. refrigerant injection device according to claim 5, is characterized in that, the pipeline being close to described refrigerant tank is provided with the first valve; The 4th valve is provided with between second end of mass flowmenter and Pressure gauge; 4th is provided with the second valve between valve and vacuum meter, be provided with the 3rd valve between Pressure gauge and refrigerant device to be implanted.
7. refrigerant injection device according to claim 6, is characterized in that, the first valve, the second valve, the 3rd valve and the 4th valve are manual ball valves.
8. refrigerant injection device according to claim 1, is characterized in that, described controller is arranged in anti-explosion cabinet; Described anti-explosion cabinet also comprises the electrical connection circuit of controller and magnetic valve, mass flowmenter and vavuum pump; Described refrigerant punching note pipe-line system is installed in refrigerant cabinet.
9. refrigerant injection device according to claim 1, is characterized in that, described controller is programmable logic controller (PLC).
10. a refrigerant method for implanting, have employed according to the refrigerant injection device one of claim 1 to 9 Suo Shu, it is characterized in that comprising: first utilize the pipeline of vavuum pump to whole refrigerant injection device to vacuumize; After the pipeline of refrigerant injected system reaches predetermined vacuum level, refrigerant is injected and the quality of the refrigerant utilizing the mass flow meter measurement of refrigerant injection device to inject to refrigerant injection device from the refrigerant tank storing refrigerant, when the refrigerant that measurement result display is injected reaches predetermined quality, mass flowmenter feeds back signal to controller, automatic control electric magnet valve shutdown system, stops injecting.
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| CN201410432098.8A CN105371541B (en) | 2014-08-28 | 2014-08-28 | Refrigerant injection device and refrigerant method for implanting |
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| CN201410432098.8A CN105371541B (en) | 2014-08-28 | 2014-08-28 | Refrigerant injection device and refrigerant method for implanting |
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Cited By (4)
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| CN107702390A (en) * | 2017-11-21 | 2018-02-16 | 上海理工大学 | A kind of carbon dioxide refrigerant high accuracy filling system and method |
| WO2018205518A1 (en) * | 2017-05-10 | 2018-11-15 | 浙江飞越机电有限公司 | Control system and method for vacuum degree detection |
| CN108845592A (en) * | 2018-08-20 | 2018-11-20 | 苏州佐竹冷热控制技术有限公司 | Coolant charging measuring system and coolant charging method |
| WO2023279725A1 (en) * | 2021-07-06 | 2023-01-12 | 青岛海尔空调器有限总公司 | Refrigerant recovery system and method |
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