CN112361679A - Marine device and method for filling refrigerant in batches - Google Patents
Marine device and method for filling refrigerant in batches Download PDFInfo
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- CN112361679A CN112361679A CN202011215005.8A CN202011215005A CN112361679A CN 112361679 A CN112361679 A CN 112361679A CN 202011215005 A CN202011215005 A CN 202011215005A CN 112361679 A CN112361679 A CN 112361679A
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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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- 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
- F25B49/00—Arrangement or mounting of control or safety devices
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Abstract
The invention provides a device and a method for filling refrigerant in bulk for a ship. The refrigerant cylinder is connected with a normally closed solenoid valve between short pipes with pressure gauges, a 1.2MPa pressure-relief fluoridation hose is arranged between a pressure measuring pipe with a pressure sensor and the short pipes with the pressure gauges, a check valve is arranged between a fluoridation stop valve and the pressure measuring pipe with the pressure sensor, the fluoridation stop valve, a seawater inlet and outlet valve are connected with a condenser with a drying filter, a temperature-adjustable electric blower is used for heating the refrigerant cylinder, a power supply plug board is connected with the normally closed solenoid valve and the temperature-adjustable electric blower, a PLC programmable controller is connected with an audible and visual alarm, the pressure measuring pipe with the pressure sensor and a relay with a power supply plug, and a main power supply plug board is connected with the PLC programmable controller and the relay with the power supply plug. The method has multiple safety precaution measures, controllable filling pressure, simple operation, reduced constructors and improved labor efficiency, and is suitable for being used as a method for filling the refrigerant in batches for the ship.
Description
Technical Field
The invention relates to the filling of marine refrigerants of various types and specifications, which is mainly applied to the filling of the refrigerants in a mooring test stage and a refrigeration unit maintenance period of a marine refrigeration unit, improves the filling efficiency and ensures that the filling process is safe and reliable. In particular to a device and a method for filling refrigerant in bulk for ships.
Background
When a ship product is subjected to a wharf mooring test, debugging, verification and operation of refrigeration equipment are required. With the increase of the ship type, the refrigerating capacity of the refrigerating unit also needs to be increased, and refrigerant with various types and specifications such as R-22, R-134a and the like needs to be filled to more than several hundred kilograms.
At present, according to the safety standard requirement of the refrigeration industry, a hot water heating method is adopted: the refrigerant steel cylinder is placed in the hot water tank, so that the pressure in the refrigerant steel cylinder is increased, and the refrigerant with the increased pressure enters the refrigerating unit with lower pressure, although the mode is safe, a water source needs to be conveyed, the efficiency is lower, and more than 6 persons can finish the work within two days; the principle of heating by adopting methods such as steam or flame heating and the like is the same as that of heating by hot water, the purpose is to increase the pressure in a refrigerant steel cylinder, and the refrigerant enters a refrigerating unit with lower pressure after the pressure of the refrigerant is increased, but the high-pressure boiling phenomenon of the refrigerant in the steel cylinder can be caused by the over-high heating speed: namely, the steel cylinder has buzzing sound, if the instantaneously generated high pressure exceeds the pressure limit, explosion is easy to occur, so the proposal has great potential safety hazard; in addition, a part of refrigerant is filled, and the refrigerator is started to supplement the balance of the refrigerant after other circuits and pipelines are completed.
For the characteristics of low efficiency and poor safety of the filling scheme, a safe and efficient filling method is urgently needed to make up the defects of the prior scheme.
Disclosure of Invention
In order to solve the technical problem of refrigerant batch filling, the invention provides a device and a method for filling refrigerant in batches for a ship. The method comprises the steps that 1.2MPa of pressure-relief fluorine hose is set as a blasting pressure-relief monitoring point; the check valve prevents the refrigerant added in the condenser from leaking out after the fluoridized hose is exploded; the PLC outputs a command to cut off the power supply after measuring that the pressure is lower than a set value of 0.3MPa, the temperature-adjustable electric blower stops working, and the normally closed electromagnetic valve is closed when power is off; the pressure of a pressure gauge is observed during heating, the pressure of a steel cylinder is controlled to be below 1.2MPa, and the technical problem of batch filling of the refrigerant for the ship is solved.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a device for filling refrigerant in batches for ships comprises a condenser with a dry filter, a check valve, a pressure measuring pipe with a pressure sensor, a 1.2MPa pressure-relief fluorine hose, a short pipe with a pressure gauge, a refrigerant steel cylinder, a temperature-adjustable electric blower, an audible and visual alarm and a PLC (programmable logic controller); a normally closed solenoid valve is connected between a refrigerant steel bottle and a short pipe with a pressure gauge, a 1.2MPa pressure-relief fluoridizing hose is arranged between a pressure measuring pipe with a pressure sensor and the short pipe with the pressure gauge, a check valve is arranged between a fluoridizing stop valve and the pressure measuring pipe with the pressure sensor, and the fluoridizing stop valve and a seawater inlet and outlet valve are connected with a condenser with a dry filter; the temperature-adjustable electric blower is used for heating a refrigerant steel cylinder, the power supply plug board is connected with the normally closed electromagnetic valve and the temperature-adjustable electric blower, the PLC is connected with the audible and visual alarm, the pressure measuring tube with the pressure sensor and the relay with the power supply plug, and the main power supply plug board is connected with the PLC and the relay with the power supply plug.
In order to further solve the technical problem to be solved by the invention, in the stop valve provided by the invention, the stop valve comprises an upper check valve body with an external threaded joint and a valve seat, a lower check valve body with an external threaded joint, a valve head, a valve rod, a spring sheath and a welding base with an air hole, so that the refrigerant in the condenser with the dry filter is prevented from leaking outwards to cause loss and environmental pollution.
Further, the electric hair drier heats the refrigerant steel cylinder.
Further, the 1.2MPa pressure-relief fluorine-adding hose is set as a blasting pressure-relief monitoring point.
Further, when the charging pressure of the refrigerant measured by the PLC according to the pressure measuring pipe with the pressure sensor reaches 1.2MPa, the PLC outputs a signal to enable the audible and visual alarm to give an alarm.
Further, when the audible and visual alarm gives an alarm, the PLC outputs a signal, the relay coil is powered off, the contact is disconnected, the temperature-adjustable electric blower is powered off to stop heating, and the normally closed electromagnetic valve is powered off to be in a closed state.
Furthermore, the pressure measuring tube with the pressure sensor is provided with the pressure sensor and the pressure measuring tube, and when the measured low-pressure alarm protection set value is 0.3MPa, the PLC outputs a signal to close the normally closed electromagnetic valve.
A method for filling refrigerant in batches for ship includes opening seawater inlet and outlet valves to make seawater cool condenser with dry filter, numbering refrigerant steel cylinders according to number of refrigerators and preventing refrigerant from being added in individual refrigerators.
Secondly, the filling system is sequentially connected according to the process flow, after the main power supply is powered on, the temperature-adjustable electric blower is gradually adjusted to the power of 2000W, the upper part of the refrigerant steel cylinder is heated firstly, the middle part of the refrigerant steel cylinder is heated, the periphery of the refrigerant steel cylinder is uniformly heated, the pressure of a pressure gauge is observed in the heating process, and the filling pressure is controlled to be 1.0MPa to 1.1 MPa.
And secondly, after the refrigerant is filled for a certain time, shaking the refrigerant steel cylinder by hand, observing the residual amount of the refrigerant, and indicating that the refrigerant in the refrigerant steel cylinder is filled completely when no liquid impacts any more inside.
Finally, if the filling pressure reaches 1.2MPa, the audible and visual alarm gives out audible and visual alarm to remind an operator to adjust the heating temperature; when the 1.2MPa pressure-relief fluorine-adding hose is broken instantly, the PLC measures that the pressure of Freon adding is lower than a set value by 0.3MPa through the pressure sensor, and immediately outputs an instruction to cut off the power supply of the relay, so that the temperature-adjustable electric blower is powered off and stops working, and meanwhile, the normally closed electromagnetic valve is closed to prevent the refrigerant in the refrigerant steel cylinder from leaking. The pressure difference generated inside and outside the condenser with the drying filter promotes the check valve to be closed, and the refrigerant added into the condenser with the drying filter is prevented from leaking.
The invention has the advantages that the 1.2MPa pressure-relief fluorine hose is set as a blasting pressure-relief monitoring point; the check valve prevents the refrigerant added in the condenser from leaking out after the fluoridized hose is exploded; the PLC outputs an instruction to cut off the power supply of the power supply plugboard after the output pressure measured by the pressure measuring tube is lower than the set value by 0.3MPa, the temperature-adjustable electric blower stops working, and the normally closed electromagnetic valve is closed when power is off; the pressure of the pressure gauge is observed during heating, the pressure of the steel cylinder is controlled below 1.2MPa, and safe filling is realized. The multiple safety precaution measures of this scheme fill controllable, the easy operation of filling pressure, reduce constructor, improve labor efficiency, prevent environmental pollution. The method solves the problem of low efficiency of large-batch filling of the refrigerant for the ship, and is suitable for application as a method for filling the refrigerant for the ship in batches.
Drawings
FIG. 1 is a process flow diagram of the present invention;
fig. 2 is a cross-sectional view of a check valve.
In the figure, 1, a refrigerant steel cylinder, 2, a normally closed electromagnetic valve, 3, a short pipe with a pressure gauge, 4.1.2MPa of a pressure-relief fluorine-adding hose, 5, a pressure measuring pipe with a pressure sensor, 6, a check valve, 6.1, an upper check valve body with an external threaded joint and a valve seat, 6.2, a lower check valve body with an external threaded joint, 6.3, a valve head, 6.4, a valve rod, 6.5, a spring, 6.6, a spring sheath, 6.7, a welding base with a vent hole, 7, a fluorine-adding stop valve, 8, a condenser with a drying filter, 9, a seawater inlet and outlet valve, 10, a temperature-adjustable electric blower, 11, a power plug board, 12, a relay with a power plug, 13, a main power plug board, 14, an audible and visual alarm, and 15, a PLC (programmable logic controller).
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in the figure, the device for filling the refrigerant in batches for the ship comprises a condenser 8 with a dry filter, a check valve 6, a pressure measuring pipe 5 with a pressure sensor, a 1.2MPa pressure-relief fluorine hose 4, a short pipe 3 with a pressure gauge, a refrigerant steel cylinder 1, a temperature-adjustable electric blower 10, an audible and visual alarm 14 and a PLC (programmable logic controller) 15; a normally closed solenoid valve 2 is connected between a refrigerant steel bottle 1 and a short pipe 3 with a pressure gauge, a 1.2MPa pressure-relief fluoridizing hose 4 is arranged between a pressure measuring pipe 5 with a pressure sensor and the short pipe 3 with the pressure gauge, a check valve 6 is arranged between a fluoridizing stop valve 7 and the pressure measuring pipe 5 with the pressure sensor, and the fluoridizing stop valve 7 and a seawater inlet and outlet valve 9 are connected with a condenser 8 with a dry filter; the temperature-adjustable electric blower 10 is used for heating a refrigerant steel cylinder 1, the power supply plug board 11 is connected with the normally closed electromagnetic valve 2 and the temperature-adjustable electric blower 10, the PLC 15 is connected with the audible and visual alarm 14, the pressure measuring tube 5 with the pressure sensor and the relay 12 with the power supply plug, and the main power supply plug board 13 is connected with the PLC 15 and the relay 12 with the power supply plug.
The check valve 6 comprises an upper check valve body 6.1 with an external threaded joint and a valve seat, a lower check valve body 6.2 with an external threaded joint, a valve head 6.3, a valve rod 6.4, a spring 6.5, a spring sheath 6.6 and a welding base 6.7 with an air hole, and the loss and the environmental pollution caused by the leakage of a refrigerant in the condenser 8 with the drying filter are prevented.
The electric hair drier 10 heats the refrigerant steel cylinder 1.
The 1.2MPa pressure-relief fluorine-adding hose 4 is set as a blasting pressure-relief monitoring point.
And when the charging pressure of the refrigerant measured by the PLC 15 according to the pressure measuring pipe 5 with the pressure sensor reaches 1.2MPa, the PLC outputs a signal to enable the audible and visual alarm 14 to give an alarm.
When the audible and visual alarm 14 gives an alarm, the PLC outputs a signal, the coil of the relay 12 is powered off, the contact is disconnected, the temperature-adjustable electric blower is powered off to stop heating, and the normally closed electromagnetic valve 2 is powered off to be in a closed state.
The pressure measuring pipe 5 with the pressure sensor is provided with the pressure sensor and the pressure measuring pipe, and when the measured low-pressure alarm protection set value is 0.3MPa, the PLC 15 outputs a signal to close the normally closed electromagnetic valve 2.
A method for filling refrigerant in batches for ship includes opening seawater inlet and outlet valve 9 to make seawater cool condenser 8 with dry filter, numbering refrigerant cylinders according to number of refrigerators to prevent refrigerant from being added in individual refrigerators.
Secondly, the filling system is sequentially connected according to the process flow, after the main power supply is powered on, the power of the temperature-adjustable electric blower 10 is gradually adjusted to 2000W, the upper part of the refrigerant steel cylinder 1 is heated firstly, the middle part of the refrigerant steel cylinder is heated secondly, the periphery of the refrigerant steel cylinder is uniformly heated, the pressure of a pressure gauge is observed in the heating process, and the filling pressure is controlled to be 1.0MPa to 1.1 MPa.
And secondly, after the refrigerant is filled for a certain time, shaking the refrigerant steel cylinder 1 by hands, observing the residual amount of the refrigerant, and indicating that the refrigerant in the refrigerant steel cylinder 1 is filled completely when no liquid is impacted in the refrigerant steel cylinder.
Finally, if the filling pressure reaches 1.2MPa, the audible and visual alarm 14 gives out audible and visual alarm to remind an operator to adjust the heating temperature; when the 1.2MPa pressure-relief fluorine-adding hose 4 is broken instantly, the PLC 15 outputs an instruction to cut off the power supply of the relay immediately after the pressure of the added Freon is lower than a set value of 0.3MPa measured by the pressure sensor, so that the temperature-adjustable electric blower 10 is powered off and stops working, meanwhile, the normally closed electromagnetic valve 2 is closed, and the check valve 6 is closed to prevent the refrigerant added in the condenser 8 with the drying filter from leaking due to the pressure difference generated inside and outside the condenser 8 with the drying filter.
The working principle of the method of the invention is as follows:
the filling is carried out by using a pressure difference method, and the refrigerant flows from a high-pressure end to a low-pressure end, namely: the heated refrigerant steel cylinder is a high-pressure end; and opening the seawater inlet and outlet valve, cooling the condenser through seawater in the system pipeline, wherein the condenser cooled by the seawater is a low-pressure end. But with 1.2MPa decompression fluoridizing hose set up to blasting pressure release monitoring point, install the pressure-measuring pipe that takes pressure sensor in the anterior of 1.2MPa decompression fluoridizing hose, only have a small amount of refrigerants through the pressure-measuring pipe that takes pressure sensor after the fluoridizing hose blasting, through experimental: after the fluoridized hose is exploded, the pressure measured by the pressure sensor is less than 0.3MPa, the numerical value of 0.3MPa is programmed and set as a working point through a PLC (programmable logic controller), if the hose is broken due to improper operation or high pressure generated at the moment of ageing of the fluoridized hose, the PLC outputs an instruction to cut off the power supply of the relay after the pressure measured by the pressure sensor is lower than the set value of 0.3MPa, so that the temperature-adjustable electric blower is powered off and stops working, meanwhile, the normally closed electromagnetic valve is closed, the internal pressure of the steel cylinder is not increased any more and is in a safe state, and the upper limit of; the fluorine hose is broken to generate pressure difference inside and outside the condenser, so that the check valve is closed to prevent the refrigerant added into the condenser from leaking. The pressure of a pressure gauge is observed when the refrigerant steel cylinder is heated, so that the pressure of the steel cylinder is controlled below 1.2MPa, and if the heating temperature of the electric hair drier reaches 1.2MPa, the PLC sends out an audible and visual alarm according to a preset alarm point to remind an operator to adjust the heating temperature.
The working process of the invention is as follows:
when filling the refrigerant, the seawater inlet and outlet valves are opened to cool the condenser. The refrigerant steel cylinders are numbered according to the number of the refrigerators, so that the phenomenon of adding more refrigerants in each refrigerator is prevented. The filling system is sequentially connected according to the process flow, after a main power supply is powered on, the temperature-adjustable electric blower is gradually adjusted to the power of 2000W, the upper part of the steel cylinder is heated firstly, the middle part of the steel cylinder is heated again, the periphery of the steel cylinder is uniformly heated, the pressure of a pressure gauge is observed in the heating process, and the filling pressure is controlled to be 1.0MPa to 1.1 MPa. After the steel cylinder is filled for a certain time, the steel cylinder is shaken by hands, the residual quantity of the refrigerant is observed, and when the inside does not have the feeling of liquid impact, the steel cylinder refrigerant is filled completely. If the filling pressure reaches 1.2MPa, the alarm gives out an audible and visual alarm to remind an operator to adjust the heating temperature; when the Freon hose is broken instantly, the PLC measures that the pressure of Freon injection is lower than a set value of 0.3MPa through the pressure sensor, immediately outputs an instruction to cut off the power supply of the relay, so that the temperature-adjustable electric blower is powered off and stops working, meanwhile, the normally closed electromagnetic valve is closed, and the pressure difference generated inside and outside the condenser promotes the closing of the check valve, thereby preventing the refrigerant added in the condenser from leaking, protecting personal safety and environment.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (8)
1. A marine batch refrigerant charging device is characterized in that: the device comprises a condenser (9) with a drying filter, a check valve (6), a pressure measuring tube (5) with a pressure sensor, a 1.2MPa pressure-relief fluorine hose (4), a short tube (3) with a pressure gauge, a refrigerant steel cylinder (1), a temperature-adjustable electric blower (10), an audible and visual alarm (14) and a PLC (programmable logic controller) (15); a normally closed solenoid valve (2) is connected between a refrigerant steel cylinder (1) and a short pipe (3) with a pressure gauge, a 1.2MPa pressure-relief fluorine hose (4) is installed between a pressure measuring pipe (5) with a pressure sensor and the short pipe (3) with the pressure gauge, a check valve (6) is installed between a fluorine stop valve (7) and the pressure measuring pipe (5) with the pressure sensor, and the fluorine stop valve (7) and a seawater inlet and outlet valve (9) are connected with a condenser (8) with a drying filter; the temperature-adjustable electric blower (10) is used for heating the refrigerant steel cylinder (1), the power supply plug board (11) is connected with the normally closed electromagnetic valve (2) and the temperature-adjustable electric blower (10), the PLC (programmable logic controller) (15) is connected with the audible and visual alarm (14), the pressure measuring tube (5) with the pressure sensor and the relay (12) with the power supply plug, and the main power supply plug board (13) is connected with the PLC (15) and the relay (12) with the power supply plug.
2. A bulk marine refrigerant charge as set forth in claim 1, wherein:
check valve (6) body (6.1) on the check valve that is equipped with outband screwed joint and disk seat, body (6.2) under the check valve of outband screwed joint, valve head (6.3), valve rod (6.4), spring (6.5), spring sheath (6.6) and take welding base (6.7) of bleeder vent, prevent to take the refrigerant in dry filter's condenser (8) to leak, cause loss and environmental pollution.
3. A bulk marine refrigerant charge as set forth in claim 1, wherein:
the electric hair drier (10) heats the refrigerant steel cylinder (1).
4. A bulk marine refrigerant charge as set forth in claim 1, wherein:
the 1.2MPa pressure-relief fluorine-adding hose (4) is set as a blasting pressure-relief monitoring point.
5. A bulk marine refrigerant charge as set forth in claim 1, wherein:
when the PLC (15) detects that the filling pressure of the refrigerant reaches 1.2MPa according to the pressure measuring pipe (5) with the pressure sensor, the PLC outputs a signal to enable the audible and visual alarm (14) to give an alarm.
6. A bulk marine refrigerant charge as set forth in claim 1, wherein:
when the audible and visual alarm (14) gives an alarm, the PLC outputs a signal, the coil of the relay (12) is powered off, the contact is disconnected, the temperature-adjustable electric blower is powered off to stop heating, and the normally closed electromagnetic valve (2) is powered off and is in a closed state.
7. A bulk marine refrigerant charge as set forth in claim 1, wherein:
the pressure measuring pipe (5) with the pressure sensor is provided with the pressure sensor and the pressure measuring pipe, when the measured low-pressure alarm protection set value is 0.3MPa, the PLC (programmable logic controller) outputs a signal, and the normally closed electromagnetic valve (2) is closed.
8. A method of using a marine bulk refrigerant charge as set forth in claim 1, wherein:
a method for filling refrigerant in batches for ships comprises the steps of opening a seawater inlet and outlet valve (9), enabling seawater to cool a condenser (8) with a dry filter, numbering refrigerant steel cylinders according to the number of refrigerators, and preventing the respective refrigerators from having the phenomenon of refrigerant addition;
secondly, connecting the filling systems in sequence according to the process flow, gradually adjusting the temperature-adjustable electric blower (10) to the power of 2000W after the main power supply is powered on, heating the upper part of the refrigerant steel cylinder (1), then heating the middle part of the refrigerant steel cylinder, uniformly heating the periphery of the refrigerant steel cylinder, observing the pressure of a pressure gauge in the heating process, and controlling the filling pressure to be 1.0MPa to 1.1 MPa;
secondly, after the refrigerant is filled for a certain time, shaking the refrigerant steel cylinder (1) by hand, observing the residual amount of the refrigerant, and indicating that the refrigerant in the refrigerant steel cylinder (1) is filled completely when no liquid impacts;
finally, if the filling pressure reaches 1.2MPa, the audible and visual alarm (14) gives out audible and visual alarm to remind an operator to adjust the heating temperature; when the 1.2MPa pressure-relief fluorine-adding hose (4) is broken instantly, the PLC (15) immediately outputs an instruction to cut off the power supply of the relay after the pressure of Freon adding measured by the pressure sensor is lower than a set value of 0.3MPa, so that the temperature-adjustable electric blower (10) is powered off and stops working, meanwhile, the normally closed electromagnetic valve (2) is closed, and the pressure difference generated inside and outside the condenser (8) with the drying filter promotes the check valve (6) to be closed, thereby preventing the refrigerant added in the condenser (8) with the drying filter from leaking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011215005.8A CN112361679A (en) | 2020-11-04 | 2020-11-04 | Marine device and method for filling refrigerant in batches |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011215005.8A CN112361679A (en) | 2020-11-04 | 2020-11-04 | Marine device and method for filling refrigerant in batches |
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| Publication Number | Publication Date |
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| CN112361679A true CN112361679A (en) | 2021-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011215005.8A Pending CN112361679A (en) | 2020-11-04 | 2020-11-04 | Marine device and method for filling refrigerant in batches |
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| CN208108571U (en) * | 2018-02-01 | 2018-11-16 | 青岛绿环工业设备有限公司 | A kind of refrigerant recovering purification filling all-in-one machine |
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|---|---|---|---|---|
| US4909042A (en) * | 1987-12-10 | 1990-03-20 | Murray Corporation | Air conditioner charging station with same refrigerant reclaiming and liquid refrigerant return and method |
| KR19980022438A (en) * | 1996-09-23 | 1998-07-06 | 박병재 | Refrigerant overcharge prevention device of vehicle air conditioner |
| KR19980034951A (en) * | 1996-11-09 | 1998-08-05 | 박병재 | Refrigerant overcharge prevention device of vehicle air conditioner |
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| CN101135414A (en) * | 2007-10-12 | 2008-03-05 | 上海理工大学 | High precision cold-producing medium filling device |
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| CN111271888A (en) * | 2020-03-27 | 2020-06-12 | 合肥天鹅制冷科技有限公司 | Refrigeration equipment capable of automatically balancing refrigerant charging amount |
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