CN215809519U - Refrigerant recovery device and refrigerant recovery system with same - Google Patents
Refrigerant recovery device and refrigerant recovery system with same Download PDFInfo
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- CN215809519U CN215809519U CN202121937082.4U CN202121937082U CN215809519U CN 215809519 U CN215809519 U CN 215809519U CN 202121937082 U CN202121937082 U CN 202121937082U CN 215809519 U CN215809519 U CN 215809519U
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Abstract
The utility model relates to the technical field of refrigerant recovery, in particular to a refrigerant recovery device and a refrigerant recovery system with the same. The refrigerant recovery device includes: an air intake line and an air exhaust line; one end of the oil return pipeline is communicated with the air suction pipeline, and the other end of the oil return pipeline is communicated with the exhaust pipeline so as to recover the refrigeration oil in the refrigeration equipment; one end of the compression pipeline is communicated with the air suction pipeline, and the other end of the compression pipeline is communicated with the oil return pipeline and used for transferring the refrigerant from the outdoor unit to the indoor unit; the compression pipeline is also communicated with a second oil separator for recovering the refrigeration oil in the refrigerant recovery device; the vacuumizing pipeline is used for vacuumizing the refrigerant recovery device; in conclusion, by adopting the structure and matching, the refrigerant can be smoothly transferred from the outdoor unit to the indoor unit for storage after the on-line test of the refrigerating unit is finished, and no waste or leakage is ensured.
Description
Technical Field
The utility model relates to the technical field of refrigerant recovery, in particular to a refrigerant recovery device and a refrigerant recovery system with the same.
Background
The emission of Freon gas can destroy the atmosphere, cause greenhouse effect and lead to global temperature rise and other environmental problems. The refrigerating equipment utilizing the Freon refrigerant is applied to various industries, and the phenomena of leakage of the Freon refrigerant, even artificial private discharge and the like possibly exist in various links such as user use, after-sales maintenance, scrapping treatment and the like from source production detection. Along with the more and more strict supervision of the freon refrigerant, the freon refrigerant in each flow link needs to be strictly monitored, recycled and the like, particularly, the refrigerant in the refrigeration equipment needs to be frequently subjected to Tench-move operation in the testing and maintenance processes, and the refrigerant is required to be ensured not to be leaked into the atmospheric environment when a connecting pipe is disconnected.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a refrigerant recovery device and a refrigerant recovery system with the same, and aims to solve the problem that in the prior art, when a refrigerant is subjected to a refrigerant lifting operation, the refrigerant is easy to leak.
Technical scheme (I)
To achieve the above object, a first aspect of the present invention provides a refrigerant recovery device comprising:
the two ends of the air suction pipeline are provided with a first connector and a second connector;
the two ends of the exhaust pipeline are provided with a third interface and a fourth interface;
one end of the oil return pipeline is communicated with the air suction pipeline, and the other end of the oil return pipeline is communicated with the exhaust pipeline so as to recover the refrigeration oil in the refrigeration equipment;
one end of the compression pipeline is communicated with the air suction pipeline, and the other end of the compression pipeline is communicated with the oil return pipeline and used for transferring the refrigerant from the outdoor unit to the indoor unit; the compression pipeline is also communicated with a second oil separator for recovering the refrigeration oil in the refrigerant recovery device;
and the vacuumizing pipeline is communicated with the oil return pipeline and is used for vacuumizing the refrigerant recovery device.
As one of the alternatives of the technical scheme, an inlet of the oil return pipeline is communicated with an inlet of the compression pipeline, and an inlet of the oil return pipeline is communicated with the first interface.
As one of the alternatives of the technical scheme, an inlet of the oil return pipeline is communicated with the suction pipeline, and a refrigerant outlet of the oil return pipeline is communicated with the compression pipeline.
As one of the alternatives of the present technical solution, the compression line includes: the refrigerant oil separator comprises a first oil separator, a refrigerant inlet of the first oil separator is communicated with a refrigerant outlet of the second oil separator, a refrigerant outlet of the first oil separator is communicated with a refrigerant inlet of the second oil separator, a refrigerant outlet of the second oil separator is communicated with a refrigerant outlet of the second oil separator, a refrigerant outlet of the second oil separator is communicated with a refrigerant inlet of the second oil separator, and a refrigerant outlet of the second oil separator is communicated with a refrigerant inlet of the second oil separator.
As one of the alternatives of the present technical solution, the oil return line includes: a refrigerant inlet of the first oil separator is communicated with the first interface, and a refrigerant outlet of the first oil separator is communicated with an inlet of the first electromagnetic valve; or a refrigerant inlet of the first oil separator is communicated with an inlet of the first electromagnetic valve, and a refrigerant outlet of the first oil separator is communicated with the second interface; and a first capillary tube and a first one-way valve are communicated between the refrigeration oil outlet of the first oil separator and the exhaust pipeline.
As one of the alternatives of the present solution, the exhaust line comprises: and the throttle valve, the liquid storage tank and the third one-way valve are sequentially communicated along the direction from the fourth interface to the third interface.
As one alternative of the present invention, the throttle valve and the fourth check valve are provided in parallel in the exhaust pipe.
To achieve the above object, a second aspect of the present invention provides a refrigerant recovery system comprising: the indoor unit and the outdoor unit are communicated with each other through the refrigerant recovery device.
(II) advantageous effects
Compared with the prior art, the utility model has the following beneficial effects:
the present invention provides a refrigerant recovery device and a refrigerant recovery system having the same, the refrigerant recovery device including: the two ends of the air suction pipeline are provided with a first connector and a second connector; the two ends of the exhaust pipeline are provided with a third interface and a fourth interface; one end of the oil return pipeline is communicated with the air suction pipeline, and the other end of the oil return pipeline is communicated with the exhaust pipeline so as to recover the refrigeration oil in the refrigeration equipment; one end of the compression pipeline is communicated with the air suction pipeline, and the other end of the compression pipeline is communicated with the oil return pipeline and used for transferring the refrigerant from the outdoor unit to the indoor unit; the compression pipeline is also communicated with a second oil separator for recovering the refrigeration oil in the refrigerant recovery device; the vacuumizing pipeline is used for vacuumizing the refrigerant recovery device; in conclusion, by adopting the structural cooperation, after the refrigeration unit is tested on line, different valve opening and closing combinations and the operation control of the compressor are utilized, so that the recovery compressor in the refrigerant recovery device can replace the compressor in the refrigeration unit, the refrigerant can be smoothly transferred from the outdoor unit to the indoor unit for storage, and no waste or leakage is ensured; in addition, the refrigeration oil recovery device can realize separation and recovery of the refrigeration oil when the refrigeration equipment moves independently through the design of the oil return pipeline; the refrigerant recovery device can separate and recover the refrigerant oil when the refrigerant recovery device moves independently through the design of the second oil return pipeline, so that the refrigerant oil between the refrigerant recovery device and the refrigerant recovery device is effectively prevented from mixing a large amount of refrigerant oil, and the refrigerant oil balance of respective systems is ensured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for a person skilled in the art to obtain other drawings without inventive labor based on these drawings, wherein:
fig. 1 is a schematic structural view of a refrigerant recovery device according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a refrigerant recovery device according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a refrigerant recovery system according to one embodiment of the present invention;
FIG. 4 is a schematic diagram of another embodiment of the present invention showing the construction of a refrigerant recovery system;
fig. 5 is a schematic view showing a structure of a refrigerant recovery system according to still another embodiment of the present invention.
In the figure: 1. an air intake pipeline; 2. a first interface; 3. a second interface; 4. an exhaust line; 5. a third interface; 6. a fourth interface; 7. an oil return line; 8. compressing the pipeline; 9. a second oil separator; 10. a first oil separator; 11. a first capillary tube; 12. a first check valve; 13. a first solenoid valve; 14. recovering the compressor; 15. a second capillary tube; 16. a second solenoid valve; 17. a second one-way valve; 18. a throttle valve; 19. a liquid storage tank; 20. a third check valve; 21. a fourth check valve; 22. an air intake duct; 23. an exhaust pipe; 24. an air valve; 25. a liquid valve; 26. a fluorine injection nozzle; 27. an outdoor heat exchanger; 28. an indoor heat exchanger; 29. a vacuum valve; 30. a gas fluorine pipe; 31. and (4) a liquid fluorine pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The utility model is described in further detail below with reference to the following figures and detailed description:
in order to solve the problem of the prior art that the refrigerant leakage is likely to occur when the refrigerant evacuation operation is performed, as shown in fig. 1 and 2, the present invention provides a refrigerant recovery system, including: the indoor unit and the outdoor unit are communicated through a refrigerant recovery device; in a particular embodiment, a refrigerant recovery device includes:
the device comprises an air suction pipeline 1, a first connector 2 and a second connector 3, wherein the two ends of the air suction pipeline are provided with the first connector 2 and the second connector 3;
an exhaust pipeline 4, both ends of which are provided with a third interface 5 and a fourth interface 6;
specifically, the first interface 2 to the fourth interface 6 are valves with manual opening and closing functions, and can close or open the interfaces; more specifically, as shown in fig. 3, when the refrigerant recovery device is used for refrigerant migration storage after the production test is finished, the refrigerant recovery device is correspondingly connected in series between the indoor unit and the outdoor unit; more specifically, the first interface 2 of the refrigerant recovery device is communicated with an exhaust port of the indoor unit through a gas fluorine pipe 30, the third interface 5 is communicated with a liquid inlet of the indoor unit through a liquid fluorine pipe 31, the second interface 3 is communicated with an inlet port of the outdoor unit, and the fourth interface 6 is communicated with an exhaust port of the outdoor unit; as shown in fig. 4, when the indoor unit needs to be maintained, the refrigerant of the faulty refrigeration equipment is migrated and stored correspondingly by bypassing the indoor compressor, so as to perform fluorine-free maintenance on the faulty unit, more specifically, the second port 3 of the refrigerant is communicated with the fluorine injection nozzle 26 through the suction pipe 22, and the third port 5 is communicated with the fluorine injection port provided on the gas valve 24 through the exhaust pipe 23; similarly, as shown in fig. 5, when the outdoor unit needs to be maintained, the refrigerant of the faulty refrigeration equipment is migrated and stored correspondingly by bypassing the indoor compressor, so as to perform fluorine-free maintenance on the faulty unit, more specifically, the second port 3 of the refrigerant is communicated with the fluorine injection port on the gas valve 24 through the gas suction pipe 22, and the third port 5 is communicated with the fluorine injection nozzle 26 through the gas discharge pipe 23; it should be noted that, the interface between the exhaust pipe 23 and the suction pipe 22 connected to the fluorine injection nozzle 26 is also provided with a valve with manual opening and closing function, so as to close or open the interface.
One end of the oil return pipeline 7 is communicated with the air suction pipeline 1, and the other end of the oil return pipeline is communicated with the exhaust pipeline 4 so as to recover the refrigeration oil in the refrigeration equipment; in a specific embodiment, the return line 7 comprises: the first oil separator 10, the first capillary tube 11 and the first check valve 12 are communicated with each other.
A compression pipeline 8, one end of which is communicated with the suction pipeline 1 and the other end of which is communicated with the oil return pipeline 7, for transferring the refrigerant from the outdoor unit to the indoor unit; the compression pipeline 8 is also communicated with a second oil separator 9 for recovering the refrigeration oil in the refrigerant recovery device; in a particular embodiment, the compression circuit 8 comprises: a first electromagnetic valve 13 communicated with the suction pipeline 1, a recovery compressor 14 communicated between an outlet of the first electromagnetic valve 13 and a refrigerant inlet of the second oil separator 9, a second capillary 15 and a second electromagnetic valve 16 communicated between an outlet of the first electromagnetic valve 13 and a refrigerant oil outlet of the second oil separator 9, and a second one-way valve 17 communicated between a refrigerant outlet of the second oil separator 9 and the oil return pipeline 7.
The vacuumizing pipeline is communicated with the oil return pipeline 7 and is used for vacuumizing the refrigerant recovery device; the air conditioner specifically comprises a vacuum valve 29 and a vacuum pump, and other structures belong to conventional designs in the refrigeration air-conditioning industry, and are not described herein; preferably, a vacuumizing interface is led out between the outlet of the first one-way valve 12, the outlet of the second one-way valve 17, the outlet of the third one-way valve 20 and the third interface 5, and a vacuum valve 29 is arranged, the vacuum valve 29 can be closed manually or closed by electric control, the vacuum valve 29 is opened after the vacuum pump is started, and the vacuum pump is closed after the vacuum valve 29 is closed; meanwhile, the vacuumizing operation often performed during online testing or after-sales fault maintenance also belongs to a conventional step or procedure, and the vacuumizing principle is not described herein again.
In the production and manufacturing process of the existing split type refrigeration equipment, the refrigerant of the unit can not be recovered to the indoor unit at the low-pressure side after the online test is finished, and the refrigerant is generally compressed to the outdoor unit at the high-pressure side by the compressor of the existing split type refrigeration equipment for storage, and by adopting the structural cooperation, after the online test of the refrigeration unit is finished, different valve opening and closing combinations and the operation control of the compressor can be utilized, so that the recovery compressor 14 in the refrigerant recovery device can replace the compressor in the refrigeration unit, the refrigerant can be smoothly transferred from the outdoor unit to the indoor unit for storage, and waste and leakage are avoided; in addition, the refrigeration oil recovery device can realize separation and recovery of the refrigeration oil when the refrigeration equipment moves independently through the design of the oil return pipeline 7; the refrigerant oil recovery device can realize separation and recovery of the refrigerant oil when the refrigerant recovery device moves independently through the design of the second oil separator 9, thereby effectively avoiding the refrigerant oil between the refrigerant oil recovery device and the refrigerant oil recovery device from mixing a large amount of refrigerant oil, and ensuring the refrigerant oil balance of respective systems.
In summary, with the refrigerant recovery device claimed in the present invention, there is no need to install a special pressure container for storing the refrigerant, so as to effectively avoid the contamination of the refrigerant during testing or maintenance, ensure the consistency of the refrigerant filling amount of the refrigeration equipment, and only need to perform vacuum pumping and pressure maintaining on the maintenance side, thereby reducing the time cost and material cost of re-filling the refrigerant by vacuum pumping.
In a specific embodiment, as shown in fig. 2, the refrigerant outlet of the first oil separator 10 is communicated with the inlet of the first solenoid valve 13, and the refrigerant inlet of the first oil separator 10 is communicated with the first port 2, so as to communicate with the indoor unit; when the refrigeration equipment works, refrigerant containing refrigeration oil in the refrigeration equipment enters the first oil separator 10 through the first connector 2 to be subjected to gas-liquid separation operation, the separated refrigerant flows to the outdoor heat exchanger 27 in the outdoor unit through the refrigerant outlet, and the separated refrigeration oil flows back to the compressor to be recycled, so that the recovery and separation of the refrigeration oil in the refrigeration equipment are realized; similarly, when the refrigerant in the outdoor unit is pressed into the indoor unit by the recovery compressor 14, the refrigerant enters the recovery compressor 14 through the first electromagnetic valve 13, is compressed by the compressor, and then enters the second oil separator 9 to recover and separate the refrigeration oil.
In another specific embodiment, as shown in fig. 1 and 3, the refrigerant inlet of the first oil separator 10 is communicated with the inlet of the first electromagnetic valve 13, and the refrigerant outlet of the first oil separator 10 is communicated with the second port 3, so that when the refrigerant is transferred from the outdoor unit to the indoor unit by the recovery compressor 14, the refrigerant will first separate the refrigerant oil in the refrigerant through the first oil separator 10, and then flow into the recovery compressor 14 through the first electromagnetic valve 13.
In the above embodiment, as shown in fig. 1 and 3, the exhaust duct 4 includes: a throttle valve 18, a liquid storage tank 19 and a third one-way valve 20 which are communicated; preferably, the throttle valve 18 and a fourth check valve 21 are arranged on the exhaust line 4 in parallel; in summary, in the present embodiment, through the combination configuration of the high-pressure liquid storage tank 19, the throttle valve 18 and the check valve, when the recovery compressor 14 presses the refrigerant in the outdoor unit into the indoor unit, the refrigerant flowing out of the liquid storage tank 19 first enters the throttle valve 18 to perform throttling operation, and then flows into the outdoor heat exchanger 27 to be vaporized, so as to effectively avoid the phenomenon of air suction and liquid entrainment of the recovery compressor 14, and further ensure the stable operation of the recovery compressor 14.
A third aspect of the utility model provides a method of controlling a refrigerant recovery system, the method comprising:
performing a vacuumizing step;
if the vacuum degree of the current refrigerant recovery device is detected to be qualified, executing a refrigeration equipment testing step;
if the current indoor unit is qualified in production, closing the air valve 24 and opening the liquid valve 25, and adjusting the opening of the throttle valve 18 to be minimum;
the first electromagnetic valve 13, the second electromagnetic valve 16 and the recovery compressor 14 are opened to press the refrigerant in the outdoor unit into the indoor unit, and the refrigerant oil in the refrigerant recovery device and the refrigerant oil in the refrigeration equipment are correspondingly recovered.
According to an embodiment of the present invention, the step of opening the first electromagnetic valve 13, the second electromagnetic valve 16 and the recovery compressor 14 to press the refrigerant in the outdoor unit into the indoor unit and correspondingly recover the refrigerant oil in the refrigerant recovery device and the refrigerant oil in the refrigeration equipment includes:
opening the first solenoid valve 13 and the second solenoid valve 16;
starting the recovery compressor 14, sucking out the refrigerant from the liquid storage tank 19, throttling the refrigerant by the throttle valve 18, and flowing into the outdoor heat exchanger 27 for vaporization;
the vaporized refrigerant is sent to the first oil separator 10 to perform a freeze oil separation operation;
the separated refrigerant is sent to the recovery compressor 14;
the refrigerant discharged from the recovery compressor 14 is sent to a second oil separator 9 to be subjected to a freeze oil separation operation;
the separated refrigerant is sent to the indoor unit.
According to an embodiment of the utility model, the method further comprises: if the indoor unit is detected to be out of order, the third interface 5 is communicated with a fluorine injection port of the air valve 24 through the exhaust pipe 23, and the second interface 3 is communicated with a fluorine injection nozzle 26 of the indoor unit through the air suction pipe 22;
opening the first electromagnetic valve 13, the second electromagnetic valve 16, the second interface 3 and the third interface 5, closing the gas valve 24, the liquid valve 25, the exhaust pipe 23, the gas suction pipe 22, the first interface 2 and the fourth interface 6, and performing a vacuumizing step;
if the current vacuum degree is qualified, opening an exhaust pipe 23 and an air suction pipe 22, and starting a recovery compressor 14 to transfer the refrigerant of the indoor unit to the outdoor unit;
if the recovery is detected to be finished, closing the recovery compressor 14, the first electromagnetic valve 13, the second electromagnetic valve 16, the exhaust pipe 23, the air suction pipe 22 and the first interface 2 to the fourth interface 6, and maintaining the indoor unit;
when the indoor unit is detected to be maintained, the step of vacuumizing the indoor unit is executed;
if the vacuum degree of the indoor unit is detected to be qualified, closing all interfaces and electromagnetic valves on the refrigerant recovery device, closing valves on an air suction pipe 22 and an air discharge pipe 23 on the refrigerant recovery device, and opening an air valve 24 and a liquid valve 25 so as to automatically balance the refrigerant of the outdoor unit and return the refrigerant to the indoor unit;
if it is detected that the refrigerant has returned to the indoor unit, the connection of the suction pipe 22 and the discharge pipe 23 to the refrigeration unit is disconnected.
According to an embodiment of the utility model, the method further comprises: if the outdoor unit is detected to be out of order, the third interface 5 is communicated with a fluorine injection nozzle 26 of the indoor unit through an exhaust pipe 23, and the second interface 3 is communicated with a fluorine injection port of the air valve 24 through an air suction pipe 22;
opening the first electromagnetic valve 13, the second electromagnetic valve 16, the second interface 3 and the third interface 5, closing the gas valve 24, the liquid valve 25, the exhaust pipe 23, the gas suction pipe 22, the first interface 2 and the fourth interface 6, and performing a vacuumizing step;
if the current vacuum degree is qualified, opening an exhaust pipe 23 and an air suction pipe 22, and starting a recovery compressor 14 to transfer the refrigerant of the outdoor unit to the indoor unit;
if the recovery is detected to be finished, closing the recovery compressor 14, the first electromagnetic valve 13, the second electromagnetic valve 16, the exhaust pipe 23, the air suction pipe 22 and the first interface 2 to the fourth interface 6, and maintaining the outdoor unit;
when the outdoor unit is detected to be maintained, the step of vacuumizing the outdoor unit is executed;
if the vacuum degree of the outdoor unit is detected to be qualified, closing all interfaces and electromagnetic valves on the refrigerant recovery device, closing valves on an air suction pipe 22 and an air discharge pipe 23 on the refrigerant recovery device, and opening an air valve 24 and a liquid valve 25 so as to automatically balance the refrigerant of the indoor unit and return the refrigerant to the outdoor unit;
if it is detected that the refrigerant has returned to the outdoor unit, the connection of the suction pipe 22 and the discharge pipe 23 to the refrigeration unit is disconnected.
As shown in fig. 1-3, the indoor unit at least comprises a compressor, a fluorine injection nozzle 26, an indoor heat exchanger 28, an expansion valve, an air valve 24 and a liquid valve 25, wherein the air valve 24 is connected with an air outlet of the indoor unit, and the liquid valve 25 is connected with a liquid inlet of the indoor unit. Usually, the gas valve 24 and the liquid valve 25 are also provided with fluorine injection ports, the gas valve 24 and the liquid valve 25 can only be opened or closed manually, when the gas valve 24 and/or the liquid valve 25 is closed, the fluorine injection ports on the gas valve 24 or the liquid valve 25 can only be communicated with the outdoor unit or the indoor unit, and the default of the utility model is that when the gas valve 24 or the liquid valve 25 is closed, the fluorine injection ports are communicated with the outdoor unit and not communicated with the indoor unit.
The specific working process is as follows;
as shown in fig. 3, the series mode during production test is used for refrigerant migration storage after the production test is finished;
during production test, the indoor unit and the outdoor unit are in a separated state, meanwhile, the outdoor unit is very simple, so a complex electric control system is not configured, but the indoor unit is complex in structure and is configured with the electric control system, so that the indoor unit is mainly subjected to online test and refrigerating system leakage detection on a production line. The common practice is: the indoor unit is filled with a small amount of refrigerant for leak detection, the outdoor unit is configured with sufficient refrigerant by adopting a test tool, the test tool of the outdoor unit is adopted to operate with the refrigerant after the indoor unit and the outdoor unit are connected, and the liquid valve 25 is closed after the test is finished, and the refrigerant is completely pressed into the test tool of the outdoor unit by the compressor, wherein the test tool comprises the small amount of refrigerant for leak detection of the original indoor unit. Because the test tool of the same outdoor unit is adopted, after a plurality of indoor units are tested, a plurality of leakage detection refrigerants of the original indoor units can be accumulated in the test tool of the outdoor unit one by one, so that more and more refrigerants of the test tool can be accumulated, more compressor refrigeration oil can be discharged or adjusted regularly, the test accuracy is influenced, meanwhile, the waste of production cost, the extension of production time and the reduction of production efficiency can be caused.
After the refrigerant recovery device is connected with the outdoor unit, specifically, the second interface 3 of the refrigerant recovery device is connected with the air inlet of the outdoor unit, and the fourth interface 6 of the refrigerant recovery device is connected with the liquid outlet of the outdoor unit; the refrigerant recovery device and the outdoor unit are used as a test tool for online test on a production line, at the moment, only the gas outlet of the indoor unit is communicated with the first interface 2 through the gas fluorine pipe 30, the liquid inlet of the indoor unit is communicated with the third interface 5 through the liquid fluorine pipe 31, and meanwhile, the rated filling amount of the filling unit in the indoor unit is required to replace a small amount of original refrigerant for leak detection.
The working process of the refrigerant recovery device in the utility model during production test is as follows:
firstly → after the refrigerant recovery device is connected with the indoor unit, the air valve 24 and the liquid valve 25 are both in the original closed state, so as to ensure accurate and tight connection, then the manual valves on the four interfaces are opened, the four one-way valves are automatically switched on or off according to the pressure difference between the two ends of the four one-way valves, after the valves are in place according to the following table, the refrigerant recovery device starts the vacuum pumping operation, specifically, the vacuum pump and the vacuum valve 29 are sequentially opened, when the vacuum pressure in the current refrigerant recovery device is detected to meet the vacuum pumping requirement, the current vacuum degree is considered to be qualified, and at the moment, the vacuum pump and the vacuum valve 29 are sequentially closed, so that the vacuum pumping operation is completed.
And (3) vacuumizing:
→ after the vacuum pumping is satisfied, close the first electromagnetic valve 13 and the second electromagnetic valve 16 on the refrigerant recovery device, and then manually open the air valve 24 and the liquid valve 25 to communicate the indoor unit and the outdoor unit, thereby starting the test of the refrigeration equipment, it should be noted that the above operation sequence cannot be wrong, and at this time, the action states of the valves are as follows:
→ after the refrigeration equipment is tested, the indoor unit is qualified in production, the indoor unit can be disconnected from the test tool of the outdoor unit and then enters the next production process, and at the moment, all the refrigerant filled in the original indoor unit needs to be transferred back to the indoor unit, so that the refrigerant in the pipelines of the outdoor unit and the refrigerant recovery device needs to be recovered to the indoor unit. The air valve 24 is closed, the liquid valve 25 is opened, and the opening degree of the throttle valve 18 is adjusted to be minimum; then, the first electromagnetic valve 13 and the second electromagnetic valve 16 are opened, the external fan is started, the recovery compressor 14 is started to press the refrigerant of the outdoor unit into the indoor unit, at the moment, the opening of the throttle valve 18 is automatically adjusted according to a control program of the recovery tool, the operation is continued until the recovery tool detects a recovery ending signal to complete the recovery operation, and the states of the valves are as follows:
→ after the recovery work is finished, the recovery tool automatically closes the recovery compressor 14, the first electromagnetic valve 13 and the second electromagnetic valve 16, and then can manually close the liquid valve 25; and finally, the manual valves on the first interface 2 and the third interface 5 are closed, so that the gas fluorine pipe 30 and the liquid fluorine pipe 31 can be disconnected from the gas outlet and the liquid inlet on the indoor unit, and the whole set of test tool consisting of the recovery tool and the outdoor unit is ensured to be still in a state of no air entering (but a gas refrigerant with little quality is reserved, and the test operation of the next indoor unit is not influenced). The production test procedure of the first indoor unit is completed, the indoor unit can enter the next production procedure, the test tool can wait for the test and recovery of the next indoor unit, and the states of the valves are as follows:
fifthly → after the next indoor unit is connected with the recovery device, the first vacuumizing procedure of the first indoor unit is not executed any more, but the second vacuumizing operation is adopted. Because the air valve 24 and the liquid valve 25 of the indoor unit are both in the original closed state, the fluorine injection port of the air valve 24 can be connected with a vacuum tube to vacuumize the pipeline between the air valve 24 and the first interface 2, and the fluorine injection port of the liquid valve 25 can be connected with a vacuum tube to vacuumize the pipeline between the liquid valve 25 and the third interface 5. And after the secondary vacuum pumping is qualified, the vacuum pumping pipe is disconnected, the air valve 24 and the liquid valve 25 are opened, and the first connector 2 and the third connector 5 are opened. The subsequent production test of the refrigeration equipment, the operation of transferring the refrigerant to the indoor unit and the like are the same as the operation of the first indoor unit → the operation of the second indoor unit. Therefore, under normal conditions, the operation steps of the first indoor unit are (r), the operation steps of the second and later indoor units are (r), and if the recovery tool detects that the vacuum degree of the tool does not meet the requirement, the operation steps are executed according to the operation steps of the first indoor unit.
As shown in fig. 4, when the indoor unit needs to be maintained, the refrigerant of the faulty refrigeration device is migrated and stored by correspondingly bypassing the indoor compressor, and the specific process is as follows:
when the indoor unit system fails in the process of laboratory online test or actual use of a user, particularly, the compressor is easy to burn, block and the like, and at this time, the refrigerant needs to be discharged to a recovery tank when the system of the indoor unit is maintained, so that the problem of recovery and storage of the refrigerant is involved. If the refrigerant recovery device is adopted, the refrigerant of the indoor unit can be transferred to the outdoor unit, then the system maintenance is carried out on the indoor unit, the refrigerant of the outdoor unit is released to the whole refrigeration equipment after the maintenance is finished and the vacuumizing is carried out, a special refrigerant recovery container is not needed, and meanwhile, the refrigerant quantity in the refrigeration equipment is basically kept unchanged before and after the maintenance.
Preparing an exhaust pipe 23 and an air suction pipe 22, wherein the end parts of the exhaust pipe 23 and the air suction pipe 22 connected to an indoor unit are provided with starting handles, and the handles can press in a thimble inside a fluorine injection nozzle 26 after being opened, so that the fluorine injection nozzle 26 is opened to realize communication and opening; after the handle is closed, the thimble in the fluorine injection nozzle 26 automatically rebounds to realize closing. A handle for manually closing the air valve 24 and the liquid valve 25 on the indoor unit, and closing the exhaust pipe 23 and the air suction pipe 22 before connecting the refrigerant recovery device; then, the third interface 5 is connected with a fluorine injection port of the air valve 24 by an exhaust pipe 23, and the second interface 3 is connected with a fluorine injection nozzle 26 of the indoor unit by an air suction pipe 22. Manual valves provided in the first port 2 to the fourth port 6 of the refrigerant recovery device before connection are in a closed state.
Secondly, after the connection is ensured to be accurate, the vacuum pump is connected to a vacuumizing interface of the refrigerant recovery device and is operated according to the following valve switching states:
after the on-off state is confirmed, the vacuum pumping operation can be carried out: and (3) sequentially opening the vacuum pump and the vacuum valve 29 until the vacuum degree is qualified, and sequentially closing the vacuum valve 29 and the vacuum pump to finish the vacuumizing operation.
After the vacuumizing operation is finished, the operation is carried out according to the following valve opening and closing states:
after the confirmation is finished, the fans of the indoor unit and the outdoor unit can be started, then the recovery compressor 14 of the refrigerant recovery device is started to transfer the refrigerant, and the operation is continued until the refrigerant recovery device detects a recovery finishing signal to finish the recovery operation. The recovery compressor 14, the first solenoid valve 13 and the second solenoid valve 16 of the refrigerant recovery device are then closed, and the various valve open and close states operate as follows:
fourthly, after the maintenance of the indoor unit system is finished, the indoor unit needs to be vacuumized: and (3) sequentially opening the vacuum pump and the vacuum valve 29, opening valves arranged on the second connector 3 and the air suction pipe 22 until the vacuum degree is qualified, and sequentially closing the vacuum valve 29 and the vacuum pump to finish the vacuumizing operation.
Closing all interfaces and electromagnetic valves on the refrigerant recovery device, closing valves on an air suction pipe 22 and an air discharge pipe 23 on the refrigerant recovery device, opening an air valve 24 and a liquid valve 25 of the refrigeration equipment, automatically balancing the refrigerant of the outdoor unit to return to the indoor unit, and finally disconnecting the air discharge pipe 23 and the air suction pipe 22 from the refrigeration equipment to complete the system maintenance of the indoor unit.
As shown in fig. 5, when the outdoor unit needs to be maintained, the refrigerant of the faulty refrigeration device is migrated and stored by correspondingly bypassing the indoor compressor, and the specific process is as follows:
when the outdoor unit system is in failure in the process of laboratory online test or actual use by users, the refrigerant needs to be discharged to a recovery tank when the system of the outdoor unit is maintained, and the problem of recovery and storage of the refrigerant is involved. If the refrigerant recovery device is adopted, the refrigerant of the outdoor unit can be transferred to the indoor unit, then the system maintenance is carried out on the outdoor unit, the refrigerant of the indoor unit is released to the whole refrigeration equipment after the maintenance is finished and the vacuumizing is carried out, a special refrigerant recovery container is not needed, and meanwhile, the refrigerant quantity in the refrigeration equipment is basically kept unchanged before and after the maintenance.
Preparing an exhaust pipe 23 and an air suction pipe 22, wherein the end parts of the exhaust pipe 23 and the air suction pipe 22 connected to an indoor unit are provided with starting handles, and the handles can press in a thimble inside a fluorine injection nozzle 26 after being opened, so that the fluorine injection nozzle 26 is opened to realize communication and opening; after the handle is closed, the thimble in the fluorine injection nozzle 26 automatically rebounds to realize closing. A handle for manually closing the air valve 24 and the liquid valve 25 on the indoor unit, and closing the exhaust pipe 23 and the air suction pipe 22 before connecting the refrigerant recovery device; then, the third interface 5 is connected with a fluorine injection nozzle 26 of the indoor unit by an exhaust pipe 23, and the second interface 3 is connected with a fluorine injection port of the air valve 24 by an air suction pipe 22. Manual valves provided in the first port 2 to the fourth port 6 of the refrigerant recovery device before connection are in a closed state.
Secondly, after the connection is ensured to be accurate, the vacuum pump is connected to a vacuumizing interface of the refrigerant recovery device and is operated according to the following valve switching states:
after the on-off state is confirmed, the vacuum pumping operation can be performed, the vacuum pump and the vacuum valve 29 are sequentially opened until the vacuum degree is qualified, and the vacuum pump 29 and the vacuum pump are sequentially closed.
After the vacuumizing operation is finished, the operation is carried out according to the following valve opening and closing states:
after the confirmation is finished, the fans of the indoor unit and the outdoor unit can be started, then the recovery compressor 14 of the refrigerant recovery device is started to transfer the refrigerant, and the operation is continued until the refrigerant recovery device detects a recovery finishing signal to finish the recovery operation. The recovery compressor 14, the first solenoid valve 13 and the second solenoid valve 16 of the refrigerant recovery device are then closed, and the various valve open and close states operate as follows:
fourthly, after the maintenance of the outdoor unit set system is finished, the outdoor unit set needs to be vacuumized: and (3) sequentially opening the vacuum pump and the vacuum valve 29, opening valves arranged on the second connector 3 and the air suction pipe 22 until the vacuum degree is qualified, and sequentially closing the vacuum valve 29 and the vacuum pump to finish the vacuumizing operation.
Closing all interfaces and electromagnetic valves on the refrigerant recovery device, closing valves on an air suction pipe 22 and an air discharge pipe 23 on the refrigerant recovery device, opening an air valve 24 and a liquid valve 25 of the refrigeration equipment, automatically balancing and returning the refrigerant of the indoor unit to the outdoor unit, and finally disconnecting the air discharge pipe 23 and the air suction pipe 22 from the refrigeration equipment to complete the system maintenance of the outdoor unit.
In the use cases of the three refrigerant recovery devices, the steps in each case can be a standard control module, wherein some control modules are universal, manual operations such as connecting the exhaust pipe 23 and the suction pipe 22, opening or closing a handle and the like in the steps are prompted by a system, and after the manual operations are completed, the next operation is carried out by confirming the refrigerant recovery device. Obviously, when the indoor unit and the outdoor unit have faults simultaneously, the refrigerant recovery device can be maintained one by one to finally realize the fault removal of the whole refrigeration equipment.
In the present invention, all the manual switches related to the first to fourth ports 2 to 6, the exhaust pipe 23 and the suction pipe 22, the vacuum valve 29, and the like may be valves controlled by electrification, such as solenoid valves, so as to implement intelligent control, improve efficiency, reduce error probability, and the like.
The embodiments in this specification are all described in a progressive manner, and some of the embodiments are mainly described as different from other embodiments, and the same and similar parts in the embodiments may participate in each other.
It is noted that in the description and claims of the present invention and in the above-mentioned figures, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the utility model described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.
Also, the terms "comprises," "comprising," and "having," as well as any variations thereof or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications and changes to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A refrigerant recovery device, comprising:
the two ends of the air suction pipeline are provided with a first connector and a second connector;
the two ends of the exhaust pipeline are provided with a third interface and a fourth interface;
one end of the oil return pipeline is communicated with the air suction pipeline, and the other end of the oil return pipeline is communicated with the exhaust pipeline so as to recover the refrigeration oil in the refrigeration equipment;
one end of the compression pipeline is communicated with the air suction pipeline, and the other end of the compression pipeline is communicated with the oil return pipeline and used for transferring the refrigerant from the outdoor unit; the compression pipeline is also communicated with a second oil separator for recovering the refrigeration oil in the refrigerant recovery device;
and the vacuumizing pipeline is communicated with the oil return pipeline and is used for vacuumizing the refrigerant recovery device.
2. The refrigerant recovery device according to claim 1, wherein an inlet of the oil return line communicates with an inlet of the compression line, and the inlet of the oil return line communicates with the first port.
3. The refrigerant recovery device according to claim 1, wherein an inlet of the oil return line communicates with the suction line, and a refrigerant outlet of the oil return line communicates with the compression line.
4. The refrigerant recovery device according to claim 1, wherein the compression line includes: the refrigerant oil separator comprises a first oil separator, a refrigerant inlet of the first oil separator is communicated with a refrigerant outlet of the second oil separator, a refrigerant outlet of the first oil separator is communicated with a refrigerant inlet of the second oil separator, a refrigerant outlet of the second oil separator is communicated with a refrigerant outlet of the second oil separator, a refrigerant outlet of the second oil separator is communicated with a refrigerant inlet of the second oil separator, and a refrigerant outlet of the second oil separator is communicated with a refrigerant inlet of the second oil separator.
5. The refrigerant recovery device according to claim 4, wherein the oil return line includes: a refrigerant inlet of the first oil separator is communicated with the first interface, and a refrigerant outlet of the first oil separator is communicated with an inlet of the first electromagnetic valve; or a refrigerant inlet of the first oil separator is communicated with an inlet of the first electromagnetic valve, and a refrigerant outlet of the first oil separator is communicated with the second interface; and a first capillary tube and a first one-way valve are communicated between the refrigeration oil outlet of the first oil separator and the exhaust pipeline.
6. The refrigerant recovery device according to claim 1, wherein the discharge line includes: and the throttle valve, the liquid storage tank and the third one-way valve are sequentially communicated along the direction from the fourth interface to the third interface.
7. The refrigerant recovery device according to claim 6, wherein the throttle valve and a fourth check valve are provided in parallel on the discharge pipe.
8. A refrigerant recovery system, comprising: an indoor unit and an outdoor unit which are communicated with each other by a refrigerant recovery device according to any one of claims 1 to 7.
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| CN113531966A (en) * | 2021-08-17 | 2021-10-22 | 珠海格力电器股份有限公司 | Refrigerant recovery device, refrigerant recovery system and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113531966A (en) * | 2021-08-17 | 2021-10-22 | 珠海格力电器股份有限公司 | Refrigerant recovery device, refrigerant recovery system and control method thereof |
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