CN116428778B - Correction-free refrigerant filling machine - Google Patents
Correction-free refrigerant filling machine Download PDFInfo
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- CN116428778B CN116428778B CN202310421817.5A CN202310421817A CN116428778B CN 116428778 B CN116428778 B CN 116428778B CN 202310421817 A CN202310421817 A CN 202310421817A CN 116428778 B CN116428778 B CN 116428778B
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 155
- 239000007788 liquid Substances 0.000 claims abstract description 78
- 238000003860 storage Methods 0.000 claims abstract description 40
- 230000010412 perfusion Effects 0.000 claims description 255
- 238000001514 detection method Methods 0.000 claims description 33
- 238000007599 discharging Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention relates to the technical field of air conditioner manufacturing, in particular to a correction-free refrigerant filling machine which comprises a refrigerant storage tank, a compensation pump, a flow controller, a filling pump, an electromagnetic valve, a liquid filling gun and a central control unit. According to the invention, the real-time pouring pressure and the real-time pouring flow rate of the refrigerant in the liquid feeding gun are detected, when the real-time pouring pressure or the real-time pouring flow rate is unstable, the opening of the pouring head is timely adjusted through the pouring head arranged in the liquid feeding gun, or the real-time pouring flow rate is timely corrected through the central control unit, or the compensating pump is timely compensated through the central control unit to adjust the pouring flow rate and keep the stable pouring result, so that the equipment performance is effectively enhanced, the equipment pouring efficiency and the equipment productivity are improved, and the problem that the refrigerant pouring precision is poor due to the fact that the refrigerant automatic pouring equipment is easy to have errors in pouring in the prior art is solved.
Description
Technical Field
The invention relates to the technical field of air conditioner manufacturing, in particular to a correction-free refrigerant filling machine.
Background
The refrigerant medium plays a very important role in the refrigerating and heating processes of the air conditioner; in order to ensure that the air conditioning unit can normally operate, a refrigerant needs to be poured into the condenser and the corresponding pipeline; the traditional refrigerant filling mode is that the refrigerant is manually added, and the adding amount is judged by the experience of staff; the mode of judging the additional quantity through experience cannot determine the optimal refrigerant quantity and accurately control the refrigerant filling quantity, manual real-time follow-up is needed, and a large amount of labor is consumed.
Chinese patent publication No.: CN201711479034.3 discloses a refrigerant filling method of air conditioner and air conditioner, which is characterized in that the refrigerant filling process is optimized, the safety of refrigerant filling and air conditioner operation is increased, the refrigerating effect is improved, and the refrigerating and heating efficiency of the air conditioner is improved; therefore, in the refrigerant automatic pouring equipment in the prior art, due to the influence of the current pressure and the pouring speed of the pouring equipment, the metering device of the pouring equipment can generate errors in refrigerant pouring, and the normal operation of refrigerant pouring can be ensured by calibrating the metering device of the pouring equipment manually, so that the refrigerant cost is increased, and a large amount of human resources are consumed.
Disclosure of Invention
Therefore, the invention provides a correction-free refrigerant filling machine which is used for solving the problem that in the prior art, refrigerant automatic filling equipment is easy to generate errors during filling, so that refrigerant filling precision is poor.
In order to achieve the above object, the present invention provides a correction-free refrigerant filling machine, comprising,
the refrigerant storage tank is used for storing high-pressure liquid refrigerant, the lower part of the outer side of the refrigerant storage tank is connected with a filling pump for discharging the refrigerant in the refrigerant storage tank, and the upper part of the same side is provided with a compensation pump for discharging and compensating the refrigerant in the refrigerant storage tank;
the flow controller is respectively connected with the filling pump and the compensation pump and used for receiving the refrigerant discharged by the filling pump and the compensation pump, the flow controller can store or discharge the refrigerant, an electromagnetic valve is arranged at one side of the flow controller and used for controlling the opening or closing of the refrigerant discharged by the flow controller, and a pressure sensor is arranged in the flow controller;
the liquid feeding gun is connected with the flow controller through the electromagnetic valve, one end of the liquid feeding gun is provided with a perfusion detection device for detecting the real-time perfusion pressure and the real-time perfusion flow rate of the refrigerant in the liquid feeding gun, the other end of the liquid feeding gun is provided with a perfusion head, and the opening of the perfusion head is adjustable;
the central control unit is respectively connected with the liquid level instrument, the perfusion pump, the compensation pump, the flow controller and the liquid adding gun; the central control unit compares the real-time perfusion pressure with a standard perfusion pressure range set in the central control unit, and when the real-time perfusion pressure is higher than the standard perfusion pressure, acquires the real-time perfusion flow rate of the refrigerant in the liquid filling gun to judge, so as to determine whether to correct the real-time perfusion flow rate detected by the perfusion detection device or judge that the perfusion is finished; when the real-time perfusion pressure is lower than the standard perfusion pressure, comparing the real-time perfusion pressure with the standard compensation pressure, and judging whether to start the compensation pump to carry out perfusion pressure compensation; the central control unit is also connected with the display device.
Further, the central control unit is internally provided with a standard filling pressure Pb and a standard filling pressure difference DeltaPb, when the liquid filling gun performs refrigerant filling, the filling detection device detects a real-time filling pressure Ps, the central control unit calculates a real-time filling pressure difference DeltaPs, deltaPs= |Pb-Ps| according to the standard filling pressure Pb and the real-time filling pressure Ps, and compares the real-time filling pressure difference DeltaPs with the standard filling pressure difference DeltaPb,
when Δps is less than or equal to Δpb, the central control unit determines that the real-time perfusion pressure difference does not exceed the standard perfusion pressure difference, and the central control unit does not adjust the operation state of the refrigerant perfusion machine;
when deltaPs is larger than deltaPb, the central control unit judges that the real-time perfusion pressure difference exceeds the standard perfusion pressure difference, and the central control unit compares the real-time perfusion pressure with the standard perfusion pressure to determine the refrigerant perfusion state of the liquid filling gun.
Further, when the central control unit judges that the real-time perfusion pressure difference exceeds the standard perfusion pressure difference, the real-time perfusion pressure Ps is compared with the standard perfusion pressure Pb,
when Ps > Pb, the central control unit judges that the real-time perfusion pressure is larger than the standard perfusion pressure, and the central control unit judges the real-time perfusion flow rate of the liquid filling gun to determine whether to adjust the perfusion;
when Ps < Pb, the central control unit judges that the real-time filling pressure is smaller than the standard filling pressure, and the central control unit judges the real-time filling pressure of the liquid filling gun according to the standard compensating pressure so as to determine whether to start the compensating pump to carry out filling pressure compensation.
Further, the central control unit is also provided with a standard compensation pressure Ph, wherein Ph < (Pb-delta Pb), when the central control unit judges that the real-time perfusion pressure is smaller than the standard perfusion pressure, the real-time perfusion pressure Ps is compared with the standard compensation pressure Ph,
when Ps < Ph, the central control unit judges that the real-time filling pressure does not reach the standard compensation pressure, the central control unit closes the electromagnetic valve, the flow controller stores the refrigerant discharged by the filling pump, and the central control unit judges the real-time storage pressure of the refrigerant in the flow controller to determine whether to open the electromagnetic valve for refrigerant filling;
when Ps is more than or equal to Ph, the central control unit judges that the real-time perfusion pressure reaches the standard compensation pressure, and the central control unit controls the compensation pump to be started to perform perfusion pressure compensation.
Further, the central control unit is internally provided with initial running power Gc of the compensation pump, when judging that the real-time perfusion pressure reaches the standard compensation pressure, the central control unit controls the compensation pump to be started with the initial running power Gc, and adjusts the initial running power Gc of the compensation pump to be in calibration running power Gc' for running according to the real-time perfusion pressure Ps and the standard compensation pressure Ph, and the compensation pump discharges the refrigerant in the refrigerant storage tank to the flow controller;
wherein, the calibration operation power Gc' =gc× [1+ (Ps-Ph)/Ps ].
Further, the central control unit is also provided with a standard discharge pressure Pr of the flow controller, when the electromagnetic valve is closed, the central control unit obtains a real-time storage pressure Pe in the flow controller through the pressure sensor and compares the real-time storage pressure Pe with the standard discharge pressure Pr,
when Pe is smaller than Pr, the central control unit judges that the real-time storage pressure does not reach the standard discharge pressure, and the central control unit does not control the electromagnetic valve to be opened;
when Pe is more than or equal to Pr, the central control unit judges that the real-time storage pressure reaches the standard discharge pressure, and the central control unit controls the electromagnetic valve to be opened for refrigerant filling.
Further, a first preset flow rate L1 and a second preset flow rate L2 are arranged in the central control unit, wherein L1 is smaller than L2, when the central control unit judges that the real-time perfusion pressure is larger than the standard perfusion pressure, the real-time perfusion flow rate Ls of the refrigerant in the liquid filling gun is obtained through the perfusion detection device, the real-time perfusion flow rate Ls is judged according to the first preset flow rate L1 and the second preset flow rate L2,
when Ls is smaller than L1, the central control unit judges that the real-time filling flow rate of the refrigerant in the liquid filling gun is lower than a first preset flow rate, the central control unit judges that the filling is finished, controls the filling pump to be closed, and prompts that the refrigerant filling is finished are carried out in the display device;
when L1 is less than or equal to Ls and less than or equal to L2, the central control unit judges that the real-time perfusion flow rate of the refrigerant in the liquid filling gun is between a first preset flow rate and a second preset flow rate, and the central control unit calculates the calibrated opening of the perfusion head and judges to determine to adjust the perfusion head;
when Ls is more than L2, the central control unit judges that the real-time perfusion flow rate of the refrigerant in the liquid filling gun is higher than a second preset flow rate, and the central control unit corrects the real-time perfusion flow rate detected by the perfusion detection device.
Further, the central control unit is internally provided with an initial opening Kc of the filling head and a maximum opening Ka of the filling head, when the central control unit judges that the real-time filling flow rate of the refrigerant in the liquid filling gun is between a first preset flow rate and a second preset flow rate, the central control unit calculates a calibration opening Kc ', kc ' =Kc× [1+ (Ps-Pb)/Ps ] of the filling head, the central control unit compares the calculated calibration opening Kc ' with the maximum opening Ka,
when Kc 'is less than or equal to Ka, the central control unit judges that the calibrated opening of the perfusion head does not exceed the maximum opening, and controls the perfusion head to adjust the opening to be the calibrated opening Kc';
when Kc' > Ka, the central control unit judges that the calibration opening degree of the perfusion head exceeds the maximum opening degree, and the central control unit judges that the calibration opening degree is not executable and corrects the real-time perfusion flow rate detected by the perfusion detection device.
Further, when the central control unit determines that the real-time perfusion flow rate detected by the perfusion detection device needs to be corrected, the central control unit acquires the real-time perfusion flow rate Ls and the real-time perfusion pressure Ps detected by the perfusion detection device, corrects the real-time perfusion flow rate Ls detected by the perfusion detection device into a corrected perfusion flow rate Ls 'and displays the corrected perfusion flow rate Ls' in the display device;
wherein the perfusion flow rate Ls' =ls+ [ ls× (Ps-Pb)/Ps ] + [ ls× (Ls-L2)/L2 ] is calibrated.
Further, the display device can display the pouring pressure, the pouring flow rate and the pouring quantity of the refrigerant pouring, wherein the pouring pressure is the real-time pouring pressure of the refrigerant in the liquid filling gun detected by the pouring detection device, the pouring flow rate is the real-time pouring flow rate of the refrigerant between a first preset flow rate and a second preset flow rate in the liquid filling gun or the corrected flow rate when the real-time pouring flow rate of the refrigerant in the liquid filling gun is higher than the second preset flow rate or the corrected flow rate when the calibrated opening of the pouring head exceeds the maximum opening, and the pouring quantity is the result calculated by the central control unit according to the refrigerant pouring duration and the pouring flow rate.
Compared with the prior art, the device has the beneficial effects that the real-time pouring pressure and the real-time pouring flow rate of the refrigerant in the liquid adding gun are detected by arranging the pouring detection device at one end of the liquid adding gun, when the real-time pouring pressure or the real-time pouring flow rate is unstable, the opening of the pouring head is timely adjusted by the pouring head arranged in the liquid adding gun, or the real-time pouring flow rate is timely corrected by the central control unit, or the pouring pressure is timely compensated by the central control unit controlling the compensating pump, so that the pouring flow rate is adjusted, the stability of the pouring result is kept, the equipment performance is effectively enhanced, the pouring error of the pouring equipment is reduced, the pouring precision and the pouring stability are ensured, and the equipment pouring efficiency and the production rate are improved.
In particular, by setting standard perfusion pressure and standard perfusion pressure difference in the central control unit and calculating the real-time perfusion pressure difference according to the standard perfusion pressure and the real-time perfusion pressure, whether the real-time perfusion pressure is stable or not is judged, the central control unit judges that the real-time perfusion pressure difference does not exceed the standard perfusion pressure difference, the real-time perfusion pressure is judged to be stable, the central control unit judges that the real-time perfusion pressure difference exceeds the standard perfusion pressure difference, the real-time perfusion pressure is unstable, and the central control unit compares the real-time perfusion pressure with the standard perfusion pressure so as to adjust the running state of the refrigerant perfusion machine, thereby reducing the perfusion error of perfusion equipment and guaranteeing the perfusion stability.
Further, the real-time perfusion pressure is compared with the standard perfusion pressure through the central control unit so as to judge the specific operation of regulating the perfusion, the central control unit judges that the real-time perfusion pressure is larger than the standard perfusion pressure, then the real-time perfusion flow rate of the liquid filling gun is further judged, the central control unit judges that the real-time perfusion pressure is smaller than the standard perfusion pressure, then the real-time perfusion pressure of the liquid filling gun is judged according to the standard compensation pressure, and the perfusion pressure compensation is timely carried out, so that the perfusion error of the perfusion equipment is reduced, and the perfusion stability is ensured.
In particular, the central control unit judges the real-time filling pressure of the liquid filling gun according to the standard compensating pressure so as to determine the mode of adjusting the running state of the refrigerant filling machine, when the central control unit judges that the real-time filling pressure does not reach the standard compensating pressure, the central control unit controls the electromagnetic valve to be closed and judges the real-time storage pressure of the refrigerant in the flow controller, and when the central control unit judges that the real-time filling pressure reaches the standard compensating pressure, the central control unit controls the compensating pump to be started to perform filling pressure compensation, and the filling result is kept stable, so that the equipment filling efficiency and the equipment filling productivity are improved.
Further, by setting the initial operation power of the compensation pump in the central control unit, when the real-time perfusion pressure is judged to reach the standard compensation pressure, the initial operation power of the compensation pump is adjusted to be the calibration operation power and is operated according to the real-time perfusion pressure and the standard compensation pressure, and the perfusion pressure is calibrated in time, so that the perfusion error is reduced, and the perfusion stability is ensured.
Further, through setting up the standard discharge pressure of accuse flow ware and according to the inside real-time storage pressure of pressure sensor acquisition accuse flow ware in the well accuse unit, judge whether real-time storage pressure reaches standard discharge pressure to confirm whether open the solenoid valve and carry out the refrigerant and pour into, with the stability of guaranteeing to pour into pressure into the stability, thereby reduce and pour into the error, guarantee to pour into stably.
Further, through setting up first preset velocity of flow and second preset velocity of flow in the well accuse unit, judge the real-time perfusion flow to confirm and pour the running state and in time revise the real-time perfusion flow, further reduce with actual difference, reduce the perfusion error, keep the perfusion result stable.
Further, the initial opening of the filling head is set in the central control unit, the real-time filling flow rate of the refrigerant in the liquid filling gun is judged to be between the first preset flow rate and the second preset flow rate, and the initial opening of the filling head is adjusted when the calibration opening of the filling head is executable, so that the opening area of the filling head is adjusted, the real-time filling flow rate is corrected, the filling error is reduced, and the filling stability is ensured.
In particular, through setting up the initial aperture of filling head in the well accuse unit to when judging that the real-time velocity of flow of filling of coolant in the liquid feeding rifle is between first preset velocity of flow and second preset velocity of flow and the calibration aperture of filling head can not carry out, according to real-time velocity of flow and real-time perfusion pressure, in time revise the real-time velocity of flow into the calibration velocity of flow of filling, reduce the perfusion error, ensure that the filling result is stable.
Further, by setting the pouring pressure, the pouring flow rate and the pouring quantity of the refrigerant pouring on the display device, the refrigerant pouring process is monitored in real time, the pouring precision and the pouring stability are ensured, the equipment performance is effectively enhanced, the production rate is improved, and the user requirements are better met.
Drawings
Fig. 1 is a schematic structural diagram of a correction-free refrigerant filling machine according to an embodiment of the invention.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1, which is a schematic structural diagram of a correction-free refrigerant filling machine according to an embodiment of the present invention, the present invention discloses a correction-free refrigerant filling machine, which comprises a refrigerant storage tank 1, a filling pump 2, a compensation pump 3, a flow controller 4, an electromagnetic valve 401, a pressure sensor 402, a liquid filling gun 5, a filling detection device 501, a filling head 502, a display device 6, and a central control unit (not shown in the figure),
the refrigerant storage tank 1 is used for storing high-pressure liquid refrigerant, the lower part of the outer side of the refrigerant storage tank 1 is connected with the filling pump 2 for discharging the refrigerant in the refrigerant storage tank 1, and the upper part of the same side is provided with the compensation pump 3 for discharging and compensating the refrigerant in the refrigerant storage tank 1;
the flow controller 4 is respectively connected with the filling pump 2 and the compensating pump 3 and is used for receiving the refrigerant discharged by the filling pump 2 and the compensating pump 3, the flow controller 4 can store or discharge the refrigerant, one side of the flow controller 4 is provided with an electromagnetic valve 401 which is used for controlling the opening or closing of the refrigerant discharged by the flow controller 4, and a pressure sensor 402 is arranged in the flow controller 4;
the liquid adding gun 5 is connected with the flow controller 4 through the electromagnetic valve 401, one end of the liquid adding gun 5 is provided with a filling detection device 501 for detecting the real-time filling pressure and the real-time filling flow rate of the refrigerant in the liquid adding gun 5, the other end of the liquid adding gun 5 is provided with a filling head 502, and the opening of the filling head 502 is adjustable;
the central control unit is respectively connected with the liquid level meter, the filling pump 2, the compensating pump 3, the flow controller 4 and the liquid adding gun 5; the central control unit compares the real-time perfusion pressure difference with a standard perfusion pressure difference arranged in the central control unit, and judges that the perfusion is stable when the real-time perfusion pressure difference does not exceed the standard perfusion pressure difference; when the real-time perfusion pressure difference exceeds the standard perfusion pressure difference, judging that the perfusion is unstable, judging that the perfusion is completed when the real-time perfusion pressure is larger than the standard perfusion pressure and the real-time perfusion flow rate is smaller than the first preset flow rate, regulating the perfusion opening of the liquid adding gun 5 or correcting the real-time perfusion flow rate when the real-time perfusion pressure is larger than the standard perfusion pressure and the real-time perfusion flow rate is within the range of the first preset flow rate and the second preset flow rate, and correcting the real-time perfusion flow rate when the real-time perfusion pressure is larger than the standard perfusion pressure and the real-time perfusion flow rate is larger than the second preset flow rate; when the real-time filling pressure is smaller than the standard filling pressure and does not reach the standard compensating pressure and the real-time storage pressure does not reach the standard discharging pressure, the electromagnetic valve 401 is not controlled to be opened, and when the real-time filling pressure is smaller than the standard filling pressure and does not reach the standard compensating pressure and the real-time storage pressure reaches the standard discharging pressure, the electromagnetic valve 401 is controlled to be opened for refrigerant filling; when the real-time perfusion pressure is smaller than the standard perfusion pressure and reaches the standard compensation pressure, the compensation pump 3 is controlled to be started to compensate the perfusion pressure; the central control unit is also connected to a display device 6.
Through setting up the detection device 501 that fills in liquid feeding rifle 5 one end, detect the real-time pressure and the real-time velocity of flow that fills of refrigerant in the liquid feeding rifle 5, when real-time pressure or the real-time velocity of flow that fills are unstable, through the first 502 that fills that sets up in the liquid feeding rifle 5, in time adjust the first 502 aperture of filling, or in time revise the velocity of flow that fills in real time through the well accuse unit, or in time compensate the pressure that fills through well accuse unit control compensation pump 3, with the adjustment flow that fills and keep filling result stable, effectively strengthened the equipment performance, the perfusion error of filling equipment has been reduced, guaranteed and filled precision and filling stability, equipment pouring efficiency and productivity ratio have been improved.
Specifically, the central control unit is internally provided with a standard filling pressure Pb and a standard filling pressure difference DeltaPb, when the liquid filling gun 5 performs refrigerant filling, the filling detection device 501 detects a real-time filling pressure Ps, the central control unit calculates the real-time filling pressure difference DeltaPs, deltaPs= |Pb-Ps| according to the standard filling pressure Pb and the real-time filling pressure Ps, and compares the real-time filling pressure difference DeltaPs with the standard filling pressure difference DeltaPb,
when Δps is less than or equal to Δpb, the central control unit determines that the real-time perfusion pressure difference does not exceed the standard perfusion pressure difference, and the central control unit does not adjust the operation state of the refrigerant perfusion machine;
when deltaPs > deltaPb, the central control unit judges that the real-time perfusion pressure difference exceeds the standard perfusion pressure difference, and the central control unit compares the real-time perfusion pressure with the standard perfusion pressure to determine the refrigerant perfusion state of the liquid filling gun 5.
The real-time filling pressure is the real-time pressure of the refrigerant in the liquid filling gun 5 detected by the filling detection device 501, the standard filling pressure set by the central control unit is an internal set value of the refrigerant filling machine, the standard filling pressure difference is used for representing the allowable pressure fluctuation range and is matched with the standard filling pressure, and the standard filling pressure difference jointly form the standard filling pressure range in the central control unit.
The standard filling pressure and the standard filling pressure difference are arranged in the central control unit, the real-time filling pressure difference is calculated according to the standard filling pressure and the real-time filling pressure, so that whether the real-time filling pressure is stable or not is judged, the central control unit judges that the real-time filling pressure difference does not exceed the standard filling pressure difference, the real-time filling pressure is judged to be stable, the central control unit judges that the real-time filling pressure difference exceeds the standard filling pressure difference, the real-time filling pressure is unstable, the central control unit compares the real-time filling pressure with the standard filling pressure, and the operation state of the refrigerant filling machine is adjusted, so that the filling error of filling equipment is reduced, and the filling stability is ensured.
Specifically, when the central control unit determines that the real-time perfusion pressure difference exceeds the standard perfusion pressure difference, the real-time perfusion pressure Ps is compared with the standard perfusion pressure Pb,
when Ps > Pb, the central control unit judges that the real-time perfusion pressure is larger than the standard perfusion pressure, and the central control unit judges the real-time perfusion flow rate of the liquid adding gun 5 to determine whether to adjust the perfusion;
when Ps < Pb, the central control unit judges that the real-time filling pressure is smaller than the standard filling pressure, and the central control unit judges the real-time filling pressure of the liquid filling gun 5 according to the standard compensating pressure to determine whether to start the compensating pump 3 for filling pressure compensation.
The real-time perfusion pressure is compared with the standard perfusion pressure through the central control unit so as to judge the specific operation of regulating the perfusion, the central control unit judges that the real-time perfusion pressure is larger than the standard perfusion pressure, then the real-time perfusion flow rate of the liquid filling gun 5 is further judged, the central control unit judges that the real-time perfusion pressure is smaller than the standard perfusion pressure, then the real-time perfusion pressure of the liquid filling gun 5 is judged according to the standard compensation pressure, and the perfusion pressure compensation is timely carried out, so that the perfusion error of the perfusion equipment is reduced, and the perfusion stability is ensured.
Specifically, the central control unit is also provided with a standard compensation pressure Ph, wherein Ph < (Pb-DeltaPb), when the central control unit judges that the real-time perfusion pressure is smaller than the standard perfusion pressure, the real-time perfusion pressure Ps is compared with the standard compensation pressure Ph,
when Ps < Ph, the central control unit determines that the real-time filling pressure does not reach the standard compensating pressure, the central control unit closes the electromagnetic valve 401, the flow controller 4 stores the refrigerant discharged by the filling pump 2, and the central control unit determines the real-time storage pressure of the refrigerant in the flow controller 4 to determine whether to open the electromagnetic valve 401 for refrigerant filling;
when Ps is more than or equal to Ph, the central control unit judges that the real-time perfusion pressure reaches the standard compensation pressure, and the central control unit controls the compensation pump 3 to be started for perfusion pressure compensation.
The standard compensation pressure is the lowest pressure that the compensation pump 3 can intervene in compensation, and should be set according to the rated power of the compensation pump 3 or the compensation capacity of the compensation pump 3.
The central control unit judges the real-time filling pressure of the liquid filling gun 5 according to the standard compensating pressure so as to determine the mode of adjusting the running state of the refrigerant filling machine, when the central control unit judges that the real-time filling pressure does not reach the standard compensating pressure, the central control unit controls the electromagnetic valve 401 to be closed and judges the real-time storage pressure of the refrigerant in the flow controller 4, and when the central control unit judges that the real-time filling pressure reaches the standard compensating pressure, the central control unit controls the compensating pump 3 to be started for filling pressure compensation, and the filling result is kept stable, thereby improving the equipment filling efficiency and the production rate.
Specifically, the central control unit is internally provided with initial running power Gc of the compensation pump 3, when the central control unit determines that the real-time perfusion pressure reaches the standard compensation pressure, the central control unit controls the compensation pump 3 to be started at the initial running power Gc, and adjusts the initial running power Gc of the compensation pump 3 to be in operation with calibrated running power Gc' according to the real-time perfusion pressure Ps and the standard compensation pressure Ph, and the compensation pump 3 discharges the refrigerant in the refrigerant storage tank 1 to the flow controller 4;
wherein, the calibration operation power Gc' =gc× [1+ (Ps-Ph)/Ps ].
By setting the initial operation power of the compensation pump 3 in the central control unit, when the real-time perfusion pressure is judged to reach the standard compensation pressure, the initial operation power of the compensation pump 3 is adjusted to be the calibration operation power according to the real-time perfusion pressure and the standard compensation pressure and is operated, and the perfusion pressure is calibrated in time, so that the perfusion error is reduced, and the stability of perfusion is ensured.
Specifically, the central control unit is also provided with a standard discharge pressure Pr of the flow controller 4, and when the electromagnetic valve 401 is closed, the central control unit acquires a real-time storage pressure Pe inside the flow controller 4 through the pressure sensor 402 and compares the real-time storage pressure Pe with the standard discharge pressure Pr,
when Pe is smaller than Pr, the central control unit judges that the real-time storage pressure does not reach the standard discharge pressure, and the central control unit does not control the electromagnetic valve 401 to be opened;
when Pe is more than or equal to Pr, the central control unit judges that the real-time storage pressure reaches the standard discharge pressure, and the central control unit controls the electromagnetic valve 401 to be opened for refrigerant filling.
The standard discharge pressure is a standard pressure that the flow controller 4 can intervene in compensating perfusion, and should be set correspondingly according to the actual parameters of the flow controller 4 and the standard perfusion pressure range set in the central control unit.
By setting the standard discharge pressure of the flow controller 4 in the central control unit and acquiring the real-time storage pressure inside the flow controller 4 according to the pressure sensor 402, whether the real-time storage pressure reaches the standard discharge pressure is judged, so that whether the electromagnetic valve 401 is opened for refrigerant filling is determined, the stability of filling pressure is ensured, the filling error is reduced, and the stability of filling is ensured.
Specifically, a first preset flow rate L1 and a second preset flow rate L2 are set in the central control unit, wherein L1 is smaller than L2, when the central control unit determines that the real-time perfusion pressure is greater than the standard perfusion pressure, the real-time perfusion flow rate Ls of the refrigerant in the liquid filling gun 5 is obtained through the perfusion detection device 501, and the real-time perfusion flow rate Ls is determined according to the first preset flow rate L1 and the second preset flow rate L2,
when Ls is smaller than L1, the central control unit judges that the real-time filling flow rate of the refrigerant in the liquid filling gun 5 is lower than a first preset flow rate, the central control unit judges that the filling is finished, controls the filling pump 2 to be closed, and prompts that the refrigerant filling is finished are carried out in the display device 6;
when L1 is less than or equal to Ls is less than or equal to L2, the central control unit judges that the real-time perfusion flow rate of the refrigerant in the liquid adding gun 5 is between a first preset flow rate and a second preset flow rate, and the central control unit calculates and judges the calibrated opening of the perfusion head 502 to determine to adjust the perfusion head 502;
when Ls > L2, the central control unit determines that the real-time perfusion flow rate of the refrigerant in the liquid filling gun 5 is higher than the second preset flow rate, and the central control unit corrects the real-time perfusion flow rate detected by the perfusion detection device 501.
The first preset flow rate and the second preset flow rate are arranged in the central control unit to form a standard flow rate range, the real-time perfusion flow rate is judged according to the corresponding setting of the actual hardware parameters of the refrigerant perfusion machine, so that the perfusion running state is determined, the real-time perfusion flow rate is corrected in time, the difference between the real-time perfusion flow rate and the perfusion running state is further reduced, the perfusion error is reduced, and the perfusion result is kept stable.
Specifically, the central control unit is provided with an initial opening Kc of the filling head 502 and a maximum opening Ka of the filling head 502, when the central control unit determines that the real-time filling flow rate of the refrigerant in the liquid filling gun 5 is between a first preset flow rate and a second preset flow rate, the central control unit calculates a calibration opening Kc ', kc ' =kc× [1+ (Ps-Pb)/Ps ] of the filling head 502, compares the calculated calibration opening Kc ' with the maximum opening Ka,
when Kc 'is less than or equal to Ka, the central control unit judges that the calibrated opening of the perfusion head 502 does not exceed the maximum opening, and controls the perfusion head 502 to adjust the opening to the calibrated opening Kc';
when Kc' > Ka, the central control unit determines that the calibrated opening of the perfusion head 502 has exceeded the maximum opening, the central control unit determines that the calibrated opening is not executable, and corrects the real-time perfusion flow rate detected by the perfusion detection device 501.
The initial opening degree of the filling head 502 is set in the central control unit, and the initial opening degree of the filling head 502 is adjusted when the real-time filling flow rate of the refrigerant in the liquid filling gun 5 is between the first preset flow rate and the second preset flow rate and the calibration opening degree of the filling head 502 is executable, so that the opening area of the filling head 502 is adjusted, the real-time filling flow rate is corrected, the filling error is reduced, and the filling stability is ensured.
Specifically, when the central control unit determines that the real-time perfusion flow rate detected by the perfusion detection device 501 needs to be corrected, the central control unit acquires the real-time perfusion flow rate Ls and the real-time perfusion pressure Ps detected by the perfusion detection device 501, corrects the real-time perfusion flow rate Ls detected by the perfusion detection device 501 into a corrected perfusion flow rate Ls ', and displays the corrected perfusion flow rate Ls' in the display device 6;
wherein the perfusion flow rate Ls' =ls+ [ ls× (Ps-Pb)/Ps ] + [ ls× (Ls-L2)/L2 ] is calibrated.
By setting the initial opening of the filling head 502 in the central control unit, and when the real-time filling flow rate of the refrigerant in the liquid filling gun 5 is judged to be between the first preset flow rate and the second preset flow rate and the calibration opening of the filling head 502 is not executable, the real-time filling flow rate is corrected into the calibration filling flow rate in time according to the real-time filling flow rate and the real-time filling pressure, so that the filling error is reduced, and the stability of a filling result is ensured.
Specifically, the display device 6 may display a filling pressure, a filling flow rate, and a filling amount of the refrigerant filling, where the filling pressure is a real-time filling pressure of the refrigerant in the liquid filling gun 5 detected by the filling detection device 501, the filling flow rate is a real-time filling flow rate of the refrigerant in the liquid filling gun 5 between a first preset flow rate and a second preset flow rate, or a corrected flow rate when the real-time filling flow rate of the refrigerant in the liquid filling gun 5 is higher than the second preset flow rate, or a corrected flow rate when the calibrated opening of the filling head 502 has exceeded the maximum opening, and the filling amount is a result calculated by the central control unit according to the refrigerant filling duration and the filling flow rate.
Through setting up the filling pressure, the flow rate of filling and the volume of filling that the refrigerant was filled at display device 6, real-time supervision refrigerant fills the process, has ensured filling accuracy and has filled stably, has effectively strengthened equipment performance, has improved productivity ratio to satisfy user's demand better.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A correction-free refrigerant filling machine is characterized by comprising,
the refrigerant storage tank is used for storing high-pressure liquid refrigerant, the lower part of the outer side of the refrigerant storage tank is connected with a filling pump for discharging the refrigerant in the refrigerant storage tank, and the upper part of the same side is provided with a compensation pump for discharging and compensating the refrigerant in the refrigerant storage tank;
the flow controller is respectively connected with the filling pump and the compensation pump and used for receiving the refrigerant discharged by the filling pump and the compensation pump, the flow controller can store or discharge the refrigerant, an electromagnetic valve is arranged at one side of the flow controller and used for controlling the opening or closing of the refrigerant discharged by the flow controller, and a pressure sensor is arranged in the flow controller;
the liquid feeding gun is connected with the flow controller through the electromagnetic valve, one end of the liquid feeding gun is provided with a perfusion detection device for detecting the real-time perfusion pressure and the real-time perfusion flow rate of the refrigerant in the liquid feeding gun, the other end of the liquid feeding gun is provided with a perfusion head, and the opening of the perfusion head is adjustable;
the central control unit is respectively connected with the liquid level instrument, the perfusion pump, the compensation pump, the flow controller and the liquid adding gun; the central control unit compares the real-time perfusion pressure with a standard perfusion pressure range set in the central control unit, and when the real-time perfusion pressure is higher than the standard perfusion pressure, acquires the real-time perfusion flow rate of the refrigerant in the liquid filling gun to judge, so as to determine whether to correct the real-time perfusion flow rate detected by the perfusion detection device or judge that the perfusion is finished; when the real-time perfusion pressure is lower than the standard perfusion pressure, comparing the real-time perfusion pressure with the standard compensation pressure, and judging whether to start the compensation pump to carry out perfusion pressure compensation; the central control unit is also connected with the display device.
2. The correction-free refrigerant filling machine according to claim 1, wherein the central control unit is provided with a standard filling pressure Pb and a standard filling pressure difference DeltaPb, the filling detection device detects a real-time filling pressure Ps when the liquid filling gun performs refrigerant filling, the central control unit calculates the real-time filling pressure differences DeltaPs, deltaPs= |Pb-Ps| according to the standard filling pressure Pb and the real-time filling pressure Ps, and compares the real-time filling pressure differences DeltaPs with the standard filling pressure differences DeltaPb,
when Δps is less than or equal to Δpb, the central control unit determines that the real-time perfusion pressure difference does not exceed the standard perfusion pressure difference, and the central control unit does not adjust the operation state of the refrigerant perfusion machine;
when deltaPs is larger than deltaPb, the central control unit judges that the real-time perfusion pressure difference exceeds the standard perfusion pressure difference, and the central control unit compares the real-time perfusion pressure with the standard perfusion pressure to determine the refrigerant perfusion state of the liquid filling gun.
3. The correction-free refrigerant filling machine according to claim 2, wherein the central control unit compares the real-time filling pressure Ps with the standard filling pressure Pb when it is determined that the real-time filling pressure difference has exceeded the standard filling pressure difference,
when Ps > Pb, the central control unit judges that the real-time perfusion pressure is larger than the standard perfusion pressure, and the central control unit judges the real-time perfusion flow rate of the liquid filling gun to determine whether to adjust the perfusion;
when Ps < Pb, the central control unit judges that the real-time filling pressure is smaller than the standard filling pressure, and the central control unit judges the real-time filling pressure of the liquid filling gun according to the standard compensating pressure so as to determine whether to start the compensating pump to carry out filling pressure compensation.
4. The correction-free refrigerant filling machine according to claim 3, wherein a standard compensation pressure Ph is further provided in the central control unit, wherein Ph < (Pb- ΔPb), the central control unit compares the real-time filling pressure Ps with the standard compensation pressure Ph when determining that the real-time filling pressure is smaller than the standard filling pressure,
when Ps < Ph, the central control unit judges that the real-time filling pressure does not reach the standard compensation pressure, the central control unit closes the electromagnetic valve, the flow controller stores the refrigerant discharged by the filling pump, and the central control unit judges the real-time storage pressure of the refrigerant in the flow controller to determine whether to open the electromagnetic valve for refrigerant filling;
when Ps is more than or equal to Ph, the central control unit judges that the real-time perfusion pressure reaches the standard compensation pressure, and the central control unit controls the compensation pump to be started to perform perfusion pressure compensation.
5. The correction-free refrigerant filling machine according to claim 4, wherein the central control unit is internally provided with an initial operation power Gc of the compensation pump, when the central control unit determines that the real-time filling pressure reaches the standard compensation pressure, the compensation pump is controlled to be started at the initial operation power Gc, the initial operation power Gc of the compensation pump is adjusted to be in a calibrated operation power Gc' for operation according to the real-time filling pressure Ps and the standard compensation pressure Ph, and the compensation pump discharges the refrigerant in the refrigerant storage tank to the flow controller;
wherein, the calibration operation power Gc' =gc× [1+ (Ps-Ph)/Ps ].
6. The correction-free refrigerant filling machine as set forth in claim 4, wherein the central control unit is further provided with a standard discharge pressure Pr of the flow controller, and when the solenoid valve is closed, the central control unit obtains a real-time storage pressure Pe inside the flow controller through the pressure sensor and compares the real-time storage pressure Pe with the standard discharge pressure Pr,
when Pe is smaller than Pr, the central control unit judges that the real-time storage pressure does not reach the standard discharge pressure, and the central control unit does not control the electromagnetic valve to be opened;
when Pe is more than or equal to Pr, the central control unit judges that the real-time storage pressure reaches the standard discharge pressure, and the central control unit controls the electromagnetic valve to be opened for refrigerant filling.
7. The correction-free refrigerant filling machine according to claim 3, wherein a first preset flow rate L1 and a second preset flow rate L2 are provided in the central control unit, wherein L1 is smaller than L2, the central control unit obtains the real-time filling flow rate Ls of the refrigerant in the liquid filling gun through the filling detection device when judging that the real-time filling pressure is larger than the standard filling pressure, judges the real-time filling flow rate Ls according to the first preset flow rate L1 and the second preset flow rate L2,
when Ls is smaller than L1, the central control unit judges that the real-time filling flow rate of the refrigerant in the liquid filling gun is lower than a first preset flow rate, the central control unit judges that the filling is finished, controls the filling pump to be closed, and prompts that the refrigerant filling is finished are carried out in the display device;
when L1 is less than or equal to Ls and less than or equal to L2, the central control unit judges that the real-time perfusion flow rate of the refrigerant in the liquid filling gun is between a first preset flow rate and a second preset flow rate, and the central control unit calculates the calibrated opening of the perfusion head and judges whether to adjust the perfusion head or not;
when Ls is more than L2, the central control unit judges that the real-time perfusion flow rate of the refrigerant in the liquid filling gun is higher than a second preset flow rate, and the central control unit corrects the real-time perfusion flow rate detected by the perfusion detection device.
8. The correction-free refrigerant filling machine according to claim 7, wherein the central control unit is provided with an initial opening Kc of the filling head and a maximum opening Ka of the filling head, and calculates a calibration opening Kc ', kc ' =Kc× [1+ (Ps-Pb)/Ps ] of the filling head when the central control unit determines that the real-time filling flow rate of the refrigerant in the liquid filling gun is between a first preset flow rate and a second preset flow rate, and compares the calculated calibration opening Kc ' with the maximum opening Ka,
when Kc 'is less than or equal to Ka, the central control unit judges that the calibrated opening of the perfusion head does not exceed the maximum opening, and controls the perfusion head to adjust the opening to be the calibrated opening Kc';
when Kc' > Ka, the central control unit judges that the calibration opening degree of the perfusion head exceeds the maximum opening degree, and the central control unit judges that the calibration opening degree is not executable and corrects the real-time perfusion flow rate detected by the perfusion detection device.
9. The correction-free refrigerant filling machine according to claim 8, wherein when the central control unit determines that the real-time filling flow rate detected by the filling detection device needs to be corrected, the central control unit acquires the real-time filling flow rate Ls and the real-time filling pressure Ps detected by the filling detection device, and corrects the real-time filling flow rate Ls detected by the filling detection device into a corrected filling flow rate Ls' to be displayed in the display device;
wherein the perfusion flow rate Ls' =ls+ [ ls× (Ps-Pb)/Ps ] + [ ls× (Ls-L2)/L2 ] is calibrated.
10. The correction-free refrigerant filling machine according to claim 9, wherein the display device is capable of displaying a filling pressure, a filling flow rate and a filling amount of refrigerant filling, wherein the filling pressure is a real-time filling pressure of the refrigerant in the filling gun detected by the filling detection device, the filling flow rate is a real-time filling flow rate of the refrigerant in the filling gun between a first preset flow rate and a second preset flow rate, or a corrected flow rate when the real-time filling flow rate of the refrigerant in the filling gun is higher than the second preset flow rate, or a corrected flow rate when a calibrated opening of the filling head has exceeded a maximum opening, and the filling amount is a result calculated by the central control unit according to the refrigerant filling time length and the filling flow rate.
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| FR3040475A1 (en) * | 2015-08-31 | 2017-03-03 | Enertime | METHOD AND DEVICE FOR EMPTYING CIRCUIT COMPRISING A WORKING FLUID |
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