CN113294947B - Automatic air charging and discharging packaging system of refrigerating machine and control method - Google Patents
Automatic air charging and discharging packaging system of refrigerating machine and control method Download PDFInfo
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- CN113294947B CN113294947B CN202110571757.6A CN202110571757A CN113294947B CN 113294947 B CN113294947 B CN 113294947B CN 202110571757 A CN202110571757 A CN 202110571757A CN 113294947 B CN113294947 B CN 113294947B
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- 238000007600 charging Methods 0.000 title claims abstract description 53
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 29
- 238000007599 discharging Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 58
- 238000005406 washing Methods 0.000 claims abstract description 42
- 230000001105 regulatory effect Effects 0.000 claims abstract description 41
- 230000008569 process Effects 0.000 claims abstract description 9
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- 238000005086 pumping Methods 0.000 claims description 7
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- 238000011144 upstream manufacturing Methods 0.000 claims description 3
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- 230000001276 controlling effect Effects 0.000 abstract description 2
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- 230000002159 abnormal effect Effects 0.000 description 2
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- 238000011161 development Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
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- 238000013461 design Methods 0.000 description 1
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- 230000007774 longterm Effects 0.000 description 1
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- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 239000003507 refrigerant Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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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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Abstract
The invention provides an automatic air charging and discharging packaging system of a refrigerator, a using method and a control method, wherein the automatic air charging and discharging packaging system comprises an air charging pipeline, a first pressure regulating valve (33), a high vacuum pipeline, a low vacuum pipeline, a first vacuum pump, a second vacuum pump, an air tank, n self-sealing joints, n stations and a control system; one end of each of the n parallel gas charging branch pipes is connected with the gas tank, the other end of each of the n parallel gas charging branch pipes is connected with the refrigerator, one end of each of the n parallel high-vacuum branch pipes is connected with the second vacuum pump, and the other end of each of the n parallel high-vacuum branch pipes is connected with the refrigerator; one end of the n-path low-vacuum branch pipes connected in parallel is connected with the first vacuum pump, and the other end of the n-path low-vacuum branch pipes is connected with the refrigerator. The flow washing of the pipeline and the refrigerator is completed by controlling the opening and closing sequence of the valve, and finally the automatic sealing is realized by air inflation. The whole process does not need to move the refrigerator, each station can be independently controlled, the device which integrates flow washing and sealing of the refrigerator is collected, the production efficiency is greatly improved, and meanwhile, the purity and the inflation pressure of the working medium of the refrigerator are guaranteed.
Description
Technical Field
The invention relates to the technical field of air charging and discharging of refrigerators, in particular to an automatic air charging and discharging packaging system of a refrigerator and a control method.
Background
In the fields of aerospace, missile guidance, remote sensing and remote measurement and the like, the refrigerating machine is widely applied due to the high efficiency and reliability of the refrigerating machine; for a refrigerating machine in a lower temperature area, high-purity helium (99.999%) is generally adopted as a refrigerating working medium, in the design and manufacture of the refrigerating machine, the purity and the pressure of the helium are extremely important technological parameters, and the impurity of the working medium can cause the refrigerating machine to generate phenomena of large abnormal sound vibration, reduction of refrigerating power and the like; the working pressure of the refrigerator during packaging can affect the refrigerating performance, resonance frequency, damping and the like of the refrigerator;
the pollution control of refrigerating medium is the key technology for developing the satellite refrigerator. Working medium pollution is a key reason for performance attenuation of the refrigerating machine, high-purity helium (99.999%) with a certain pressure is filled in the refrigerating machine, the purity of the helium has a great influence on the performance of the refrigerating machine, and the performance of the refrigerating machine is reduced and even loses efficacy due to the fact that impurity gas pollutes the helium. Working medium pollution is a bottleneck problem which restricts the development of a refrigerator with long service life.
The exhaust and inflation sealing of the refrigerator in the assembling process of the refrigerator is very critical to the control of working medium pollution, and the long-term operation reliability of the refrigerator is directly influenced.
In the conventional refrigerating machine production process, the refrigerating machine purification process and the packaging process are separated, the refrigerating machine purification is carried out on a special inflating flow washing replacement device, then a special refrigerating machine packaging system is used for packaging the refrigerating machine, the whole process is manually controlled, the production efficiency is low, and the effect is poor, so that the development of a set of automatic inflating and exhausting sealing system of the refrigerating machine is very necessary for improving the performance of the refrigerating machine.
Disclosure of Invention
The invention aims to solve the technical problem of providing an automatic charging and discharging packaging system of a refrigerator, which integrates flow washing, charging and sealing.
The invention solves the technical problems through the following technical means:
the automatic air charging and discharging packaging system of the refrigerator comprises an air charging pipeline, a first pressure regulating valve (33), a high vacuum pipeline, a low vacuum pipeline, a first vacuum pump (1), a second vacuum pump (2), an air tank, n self-sealing joints, n stations, a high temperature box and a control system;
each station is provided with a self-sealing joint; the station is used for placing a refrigerator;
the inflation pipeline comprises n inflation branch pipes (31) connected in parallel; one end of the inflation branch pipe (31) is communicated with an air outlet of the air tank, and the other end of the inflation branch pipe is communicated with an air inlet of the refrigerator through a corresponding self-sealing joint; a first valve (32) is also arranged on the inflation branch pipe (31); the first pressure regulating valve (33) is arranged at an air outlet of the air tank;
the high vacuum pipeline comprises n high vacuum branch pipes (41) connected in parallel; one end of the high-vacuum branch pipe (41) is connected with the second vacuum pump (2), and the other end of the high-vacuum branch pipe is communicated with an air inlet of the refrigerator through a self-sealing joint; a second valve (42) is arranged on the high vacuum branch pipe (41);
the low vacuum pipeline comprises n low vacuum branch pipes (51) connected in parallel; one end of the low-vacuum branch pipe (51) is connected with the first vacuum pump (1), and the other end of the low-vacuum branch pipe is communicated with an air inlet of the refrigerator through a corresponding self-sealing joint; a third valve (52) is arranged on the low vacuum branch pipe (51);
the second vacuum pump (2) is communicated with the first vacuum pump (1) through a connecting pipe, and a fourth valve (6) is arranged on the connecting pipe;
the first valve (32) to the fourth valve (6) and the first pressure regulating valve (33) are in communication connection with a control system.
The invention realizes full-automatic flow control through the air inlet pipeline, the high vacuum pipeline, the low vacuum pipeline and the invention on each pipeline, all valves are pneumatic valves, the process flow can be set randomly, the full-automatic operation can be realized, the full-flow unattended operation of flow washing, inflation and sealing can be realized, and the purity and the pressure of the working medium in the refrigerator can be ensured.
Further, the device also comprises a second pressure regulating valve (34); the second pressure regulating valve (34) is arranged on a pipeline of the inflation branch pipe (31) and is positioned between the first pressure regulating valve (33) and the first valve (32); the second pressure regulating valve (34) is in communication with the control system.
Further, the first valve (32) to the fourth valve (6) are all pneumatic valves.
Further, the device also comprises a high-temperature box; the n self-sealing joints, the n stations and the refrigerating machines to be subjected to flow washing and sealing are all positioned in the high-temperature box.
Further, the device also comprises a vent valve (7); and the emptying valve (7) is arranged on an exhaust pipeline, and the exhaust pipeline is connected with an air inlet of the refrigerator through a self-sealing joint.
Further, the inflation branch pipe (31) is provided with a pressure transmitting meter, and the high vacuum branch pipe (41) and the low vacuum branch pipe (51) are provided with vacuum meters for displaying the pressure and the vacuum degree in the pipeline in real time; the pressure transmitting gauge and the vacuum gauge are both in communication connection with the control system.
Corresponding to the system, the invention also provides an automatic air charging and discharging packaging method for the refrigerator, which comprises the following steps:
Step 21, placing the refrigerator at a corresponding station and connecting the refrigerator with a corresponding inflation branch pipe (31) through a self-sealing joint;
step 23, closing the second valve (42) and the third valve (52), and opening the first valve (32) to start charging air to the refrigerator;
step 24, after the refrigerator is inflated to a set pressure value, closing the first valve (32), standing for a period of time, opening the emptying valve (7), and reducing the pressure in the refrigerator to normal pressure (namely one atmospheric pressure);
step 25, repeating the steps 22 to 24, and performing flow washing on the refrigerator for a set number of times, wherein the vacuum degree evacuated by the last flow washing reaches a set value;
step 3, aeration
After the flow washing of the refrigerator is finished, closing the second valve (42) and the third valve (52), opening the first valve (32) to start charging air into the refrigerator, and closing the first valve (32) after the refrigerator charges air to a set sealing pressure value;
step 4. sealing
The self-sealing joint is disconnected, and the refrigerator is automatically sealed.
Further, a second pressure regulating valve (34) is installed upstream of the first valve (32) on each charging line, and the intake pressure of the refrigerator installed at each station is independently controlled by each pressure regulating valve.
Corresponding to the system, the invention also provides a control method for automatic air charging and discharging packaging of the refrigerator, which comprises the following steps:
s1, setting vacuum degree values of a low vacuum pipeline and a high vacuum pipeline, setting an inflation pressure value and setting the number of washing times according to the pressure requirement of a working medium required by a refrigerator to be inflated;
s2, starting a system, wherein the control system starts a first valve (32) to a fourth valve (6), a first vacuum pump (1), a second vacuum pump (2) and a first pressure regulating valve (33) according to a set sequence, and a high-temperature box is used for carrying out system initialization;
s3, after the initialization is finished, the control system starts to execute a flow washing program after obtaining a signal that the connection of the refrigerator and the gas charging pipe is finished;
s4, after the flow washing program is finished, the control system executes final inflation till a sealing pressure value, then finishes inflation and controls all valves to be closed;
and S5, disconnecting the self-sealing joint and finishing sealing.
Furthermore, the control method controls the opening and closing of the first valve (32) to the fourth valve (6), the first vacuum pump (1), the second vacuum pump (2) and the first pressure regulating valve (33) according to the pressure and vacuum degree signals fed back by the pipelines.
Further, in the step S4, according to the difference of the working medium pressure required by the refrigerator on each station, the control system automatically adjusts the second pressure regulating valve (34) on the corresponding charging branch pipe (31) to perform secondary pressure adjustment to a required value, and then charges the gas.
The invention has the advantages that:
the invention realizes full-automatic flow control through the air inlet pipeline, the high vacuum pipeline, the low vacuum pipeline and the valves on the pipelines, all the valves are pneumatic valves, the process flow can be set randomly, the full-automatic operation is realized, the full-flow unattended operation of flow washing, inflation and sealing can be realized, and the purity and the pressure of the working medium in the refrigerator are ensured. The multiple stations are independent from each other, and can respectively carry out each step of evacuation \ inflation \ deflation \ sealing without mutual influence.
The second pressure regulating valve arranged on each inflation branch pipe can realize batch production of refrigerators with the same working medium pressure or refrigerators with different working medium pressures, and the system has wide application range.
The first vacuum pump, the second vacuum pump, the high vacuum pipeline and the low vacuum pipeline are arranged, so that the system can be respectively applied to refrigerators with different requirements on the cleaning degree of the convection washing, namely, the refrigerator with low standard requirement can be directly and roughly pumped, high vacuum pumping is not used, the application range of the system is enlarged, and the production efficiency is improved;
for a high-standard refrigerating machine, the vacuum degree (less than or equal to 1 to 10) in the flow washing process is greatly improved by arranging a second vacuum pump and a high vacuum pipeline-5Pa), the high temperature box that the cooperation set up toasts the high temperature of degasification (90 ℃), and the gas charging line is washed the high pressure gas charging stream many times (more than or equal to 5MPa) of refrigerator, can the effectual pollution problem who solves the inside working medium of refrigerator, guarantees its high-purity state (99.999%), realizes that the refrigerator is permanent, effective, reliable work.
The control method is simple, all process parameters are set in the control system in advance, and batch products with the same parameters can be directly started by one key after being installed at corresponding stations, so that the whole process of flow washing and packaging is fully automatically realized, and the production efficiency is greatly improved.
Drawings
Fig. 1 is a schematic view of the overall structural principle of an automatic air charging and discharging packaging system for a refrigerator according to embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of a product after an automatic air charging and discharging packaging system of a refrigerator is integrated in embodiment 1 of the present invention.
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 embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. 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.
Example 1
The embodiment provides an automatic air charging and discharging packaging system for a refrigerator, which is used for full-automatic implementation of flow washing, air charging and sealing of the refrigerator and ensures the purity and packaging pressure of a refrigerant of the refrigerator. As shown in fig. 1, the system comprises an inflation pipeline, a first pressure regulating valve, a high vacuum pipeline, a low vacuum pipeline, a first vacuum pump 1, a second vacuum pump 2, a gas tank, n self-sealing joints, n stations and a control system; wherein, high-purity working medium, such as high-purity helium, is stored in the gas tank. The first vacuum pump 1 is used for rough pumping of all pipelines, generally adopting a dry pump, and the second vacuum pump 2 is used for high vacuum pumping of high vacuum pipelines, generally adopting a cryogenic pump.
The station is used for placing the refrigerator, and every station configuration is a self sealing joint, and self sealing joint one end is connected with the refrigerator, and the other end communicates with gas charging line, high vacuum pipeline, low vacuum pipeline, exhaust pipe respectively to 6 stations are taken as the example, and concrete structure is as follows:
the inflation pipeline comprises 6 inflation branch pipes 31 connected in parallel; one end of the inflation branch pipe 31 is communicated with an air outlet of the air tank, and the other end of the inflation branch pipe is communicated with an air inlet of the refrigerator through a corresponding self-sealing joint; a first valve 32 is arranged on the inflation branch pipe 31; a first pressure regulating valve 33 is installed at the outlet of the gas tank to regulate the pressure of the working fluid entering each of the gas charging branch pipes 31.
The high vacuum pipeline comprises 6 high vacuum branch pipes 41 connected in parallel; one end of the high vacuum branch pipe 41 is connected with the second vacuum pump 2, and the other end is communicated with an air inlet of the refrigerator through a self-sealing joint; a second valve 42 is arranged on the high vacuum branch pipe 41;
the low vacuum pipeline comprises 6 low vacuum branch pipes 51 connected in parallel; one end of the low vacuum branch pipe 51 is connected with the first vacuum pump 1, and the other end is communicated with an air inlet of the refrigerator through a self-sealing joint; a third valve 52 is installed in the low vacuum branch pipe 51;
the second vacuum pump 2 is communicated with the first vacuum pump 1 through a connecting pipe, and a fourth valve 6 is installed on the connecting pipe.
In this embodiment, in order to independently control the charging pressure of the refrigerator in each station, a second pressure regulating valve 34 is further installed on the pipeline of the charging branch pipe 31, and the second pressure regulating valve 34 is located upstream of the first valve 32; the second pressure regulating valve 34 is communicatively connected to the control system.
In this embodiment, still be provided with 6 ways of blast pipes, the blast pipe of every station is connected with the refrigerator through self sealss joint, installs atmospheric valve 7 on the blast pipe.
In the embodiment, the first valve 32 to the fourth valve 6 and the emptying valve 7 are all pneumatic valves and are in communication connection with the control system. The first pressure regulating valve 33 and the second pressure regulating valve 34 are automatically and accurately controlled by a gas proportional pressure reducing valve and a proportional back pressure valve, and an operator only needs to set a required pressure value.
In this embodiment, for the convenience of connecting, self sealss joint one end is connected with the refrigerator, and the other end is connected with a 5 siphunculus, and other 4 logical of 5 siphunculus are convenient for install, maintain and overhaul with aerifing branch pipe, high vacuum branch pipe, low vacuum branch pipe, blast pipe intercommunication respectively.
In the embodiment, n self-sealing joints, n stations and the refrigerating machine to be subjected to flow washing and sealing are arranged in the high-temperature box, and the refrigerating machine is subjected to high-temperature baking and degassing through the high-temperature box, so that the flow washing precision and the purity of the working medium can be ensured.
Of course, in order to realize automatic control, the gas charging branch pipe 31, the high vacuum branch pipe 41, the low vacuum branch pipe 51 and the refrigerator are all provided with a pressure transmitter and a vacuum gauge (not shown in the figure); the pressure transducer and the vacuum gauge are both in communication connection with the control system.
The automatic air charging and discharging packaging system for the refrigerating machine, provided by the embodiment, has a pipeline system which is designed by all metals and comprises a pipeline and a pipeline joint, and the overall pressure resistance is designed according to 15 MPa. The main inflation pipeline is made of 1/2' high-cleanness stainless steel pipe. Eliminating working medium pollution caused by the gas release of the non-metallic material in the sealing process. The control system can realize an automatic flow, and the upper computer can carry out on-site monitoring and has the functions of control, data display, recording and the like. The control system can realize automatic operation under unattended operation; when the equipment is abnormal, the equipment can be stopped in time, and the safety of people and equipment is guaranteed.
The system integrates flow washing, inflation and sealing, has small equipment volume and easy operation, greatly improves the inflation efficiency of the refrigerating machine, and simultaneously ensures the purity and the sealing pressure of the working medium. As shown in fig. 2, the cryopump, the dry pump, the valves, and the pressure regulating valve are all located in an integrated tank, the high temperature tank is located above the integrated tank, and the pipeline penetrates out of the top wall of the integrated tank and is connected with the sealing structure from the bottom wall of the high temperature tank.
Example 2
Based on the system provided in embodiment 1, this embodiment provides an automatic charging and discharging packaging method for a refrigerator, including the following steps:
Step 21, placing the refrigerator at a corresponding station and connecting the refrigerator with a corresponding self-sealing joint;
step 23, closing the second valve 42 and the third valve 52, and opening the first valve 32 to start charging air to the refrigerator;
step 24, after the refrigerator is inflated to a set pressure value, closing the first valve 32, opening the emptying valve 7, and reducing the pressure in the refrigerator to normal pressure (namely one atmospheric pressure);
step 25, repeating the steps 22 to 24, and performing flow washing on the refrigerator for a set number of times, wherein the vacuum degree evacuated by the last flow washing reaches a required set value;
step 3, aeration
After the flow washing of the refrigerator is finished, closing the second valve 42 and the third valve 52, opening the first valve 32 to start charging air to the refrigerator, and closing the first valve 32 after the refrigerator is charged to the sealing pressure value; in this link, the inflation pressure of each refrigerator can be independently controlled by adjusting the second pressure regulating valve 34, so that refrigerators with the same working medium pressure and refrigerators with different working medium pressures can be produced in batches.
Step 4. sealing
The self-sealing joint is cut off, and the air inlet of the refrigerator is automatically sealed.
Example 3
Based on embodiment 1 and embodiment 2, the present embodiment provides a method for controlling an automatic air charging and discharging package of a refrigerator, including the following steps:
s1, setting the vacuum degree values of a low vacuum pipeline and a high vacuum pipeline, setting the pressure values of a first pressure regulating valve 33 and a second pressure regulating valve 34 and setting the number of times of washing according to the pressure requirement of a working medium required by a refrigerator to be inflated;
s2, starting a system, wherein the control system starts the first valve 32 to the fourth valve 6, the first vacuum pump 1, the second vacuum pump 2, the first pressure regulating valve 33, the second pressure regulating valve 34 and the high-temperature box according to a set sequence to carry out system initialization;
s3, after the initialization is finished, the control system starts to execute a flow washing program after obtaining a signal that the connection of the refrigerator and the gas charging pipe is finished;
s4, after the flow washing program is finished, the control system performs air inflation to the refrigerator to a sealing pressure value, then finishes the air inflation, and controls all valves to be closed;
and S5, disconnecting the self-sealing joint and finishing sealing.
In this embodiment, self sealss connect the manual butt joint and the disconnection, also can adopt intelligent butt joint. The intelligent butt joint can be directly purchased, and the structure and the working principle are not detailed.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The automatic air charging and discharging packaging system of the refrigerator is characterized by comprising an air charging pipeline, a first pressure regulating valve (33), a high vacuum pipeline, a low vacuum pipeline, a first vacuum pump (1), a second vacuum pump (2), an air tank, n self-sealing joints, n stations and a control system;
each station is provided with a self-sealing joint; the station is used for placing a refrigerator;
the inflation pipeline comprises n inflation branch pipes (31) connected in parallel; one end of the inflation branch pipe (31) is communicated with an air outlet of the air tank, and the other end of the inflation branch pipe is communicated with an air inlet of the refrigerator through a corresponding self-sealing joint; a first valve (32) is also arranged on the inflation branch pipe (31); the first pressure regulating valve (33) is arranged at an air outlet of the air tank;
the high vacuum pipeline comprises n high vacuum branch pipes (41) connected in parallel; one end of the high-vacuum branch pipe (41) is connected with the second vacuum pump (2), and the other end of the high-vacuum branch pipe is communicated with an air inlet of the refrigerator through a self-sealing joint; a second valve (42) is arranged on the high vacuum branch pipe (41);
the low vacuum pipeline comprises n low vacuum branch pipes (51) connected in parallel; one end of the low-vacuum branch pipe (51) is connected with the first vacuum pump (1), and the other end of the low-vacuum branch pipe is communicated with an air inlet of the refrigerator through a corresponding self-sealing joint; a third valve (52) is arranged on the low vacuum branch pipe (51);
the second vacuum pump (2) is communicated with the first vacuum pump (1) through a connecting pipe, and a fourth valve (6) is arranged on the connecting pipe;
the first valve (32) to the fourth valve (6) and the first pressure regulating valve (33) are in communication connection with a control system;
also comprises a blow-down valve (7); the emptying valve (7) is arranged on an exhaust pipeline, and the exhaust pipeline is connected with an air inlet of the refrigerator through a self-sealing joint;
the automatic charging and discharging packaging method of the refrigerator comprises the following steps:
step 1, initializing a system, opening a first valve (32), a second valve (42), a third valve (52), a fourth valve (6) and a first vacuum pump (1), starting to evacuate the whole pipeline and a second vacuum pump (2), and jumping to the step 2 for the low-requirement flow washing standard when the vacuum degree in the pipeline reaches a set value; for the high-requirement flow washing standard, closing the first valve (32), the second valve (42), the third valve (52) and the fourth valve (6), opening the second vacuum pump (2), enabling the first vacuum pump (1) and the second vacuum pump (2) to be in a running state, evacuating the high vacuum pipeline by the second vacuum pump (2), opening the first pressure regulating valve (33) when the vacuum degree in the high vacuum pipeline reaches the set requirement, inflating the inflation pipeline at the set pressure, and finishing initialization;
step 2, flow washing
Step 21, placing the refrigerator at a corresponding station and connecting the refrigerator with a corresponding inflation branch pipe (31) through a self-sealing joint;
step 22, opening a third valve (52) to perform rough pumping on the refrigerator to a set pressure, jumping to step 23 for the low-requirement flow washing standard, closing the third valve (52) firstly for the high-requirement flow washing standard, then opening a second valve (42), performing high-vacuum pumping on the refrigerator by a second vacuum pump (2), and executing step 23 after the refrigerator is pumped to a set vacuum degree;
step 23, closing the second valve (42) and the third valve (52), and opening the first valve (32) to start charging air to the refrigerator;
step 24, after the refrigerator is inflated to a set pressure value, closing the first valve (32), opening the emptying valve (7), and reducing the pressure in the refrigerator to normal pressure;
step 25, repeating the steps 22 to 24, and performing flow washing on the refrigerator for a set number of times, wherein the vacuum degree evacuated by the last flow washing reaches a set value required by the technological process;
step 3, aeration
After the flow washing of the refrigerator is finished, closing the second valve (42) and the third valve (52), opening the first valve (32) to start charging air into the refrigerator, and closing the first valve (32) after the refrigerator is charged with air to a set packaging pressure;
step 4. sealing
The self-sealing joint is disconnected, and the refrigerator is automatically sealed.
2. The chiller automatic air charging and discharging packaging system according to claim 1, further comprising a second pressure regulating valve (34); the second pressure regulating valve (34) is arranged on a pipeline of the inflation branch pipe (31) and is positioned between the first regulating valve and the first valve (32); the second pressure regulating valve (34) is in communication with the control system.
3. The refrigerator automatic charging and discharging packaging system according to claim 1 or 2, wherein the first to fourth valves (32) to (6) are all pneumatic valves.
4. The refrigerator automatic charging and discharging packaging system according to claim 1 or 2, further comprising a high temperature tank; the n self-sealing joints, the n stations and the refrigerating machines to be subjected to flow washing and sealing are all positioned in the high-temperature box.
5. The automatic charging and discharging packaging system of the refrigerator according to claim 1 or 2, wherein the charging branch pipe (31) is provided with a pressure transducer, and the high vacuum branch pipe (41) and the low vacuum branch pipe (51) are provided with vacuum gauges; the pressure transmitting gauge and the vacuum gauge are both in communication connection with the control system.
6. The automatic air charging and discharging packaging system for refrigerators according to claim 1, wherein a second pressure regulating valve (34) is installed upstream of the first valve (32) on each air charging line, and the air charging pressure of each refrigerator is independently controlled by each pressure regulating valve.
7. A control method for automatic air charging and discharging packaging of a refrigerator, which is applied to the automatic air charging and discharging packaging system of the refrigerator of any one of claims 1 to 6, is characterized by comprising the following steps:
s1, setting vacuum degree values of a low vacuum pipeline and a high vacuum pipeline, setting an inflation pressure value and setting the number of washing times according to the pressure requirement of a working medium required by a refrigerator to be inflated;
s2, starting a system, and starting a first valve (32) to a fourth valve (6), a first vacuum pump (1), a second vacuum pump (2) and a first pressure regulating valve (33) by a control system according to a set sequence to initialize the system;
s3, after the initialization is finished, the control system starts to execute a flow washing program after obtaining a signal that the connection of the refrigerator and the gas charging pipe is finished;
s4, after the flow washing program is finished, the control system executes final inflation till a sealing pressure value, then finishes inflation and controls all valves to be closed;
and S5, disconnecting the self-sealing joint and finishing sealing.
8. The control method according to claim 7, wherein the control system controls the opening and closing of the first valve (32) to the fourth valve (6), the first vacuum pump (1), the second vacuum pump (2) and the first pressure regulating valve (33) according to the pressure signals fed back by the pipelines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110571757.6A CN113294947B (en) | 2021-05-25 | 2021-05-25 | Automatic air charging and discharging packaging system of refrigerating machine and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110571757.6A CN113294947B (en) | 2021-05-25 | 2021-05-25 | Automatic air charging and discharging packaging system of refrigerating machine and control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113294947A CN113294947A (en) | 2021-08-24 |
| CN113294947B true CN113294947B (en) | 2021-11-19 |
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| CN202110571757.6A Active CN113294947B (en) | 2021-05-25 | 2021-05-25 | Automatic air charging and discharging packaging system of refrigerating machine and control method |
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| US4285206A (en) * | 1979-02-05 | 1981-08-25 | Draf Tool Co., Inc. | Automatic refrigerant recovery, purification and recharge apparatus |
| CN202002413U (en) * | 2011-04-14 | 2011-10-05 | 山东科灵新能源发展有限公司 | Air conditioner unit vacuum-pumping fluoridating device |
| EP2712416A1 (en) * | 2011-04-29 | 2014-04-02 | Ecotechnics S.p.a. | Two-fluid apparatus and method for recovering and regenerating refrigerant fluids |
| CN208154890U (en) * | 2018-05-14 | 2018-11-27 | 佛山市顺德区鼎联智能科技有限公司 | One kind vacuumizes and refrigerant charging all-in-one machine |
| CN209326151U (en) * | 2018-11-20 | 2019-08-30 | 深圳市泰路科技有限公司 | A kind of refrigerant motor recycling charging machine |
| CN111649509A (en) * | 2020-05-12 | 2020-09-11 | 浙江飞越机电有限公司 | Intelligent refrigerant filling control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4285206A (en) * | 1979-02-05 | 1981-08-25 | Draf Tool Co., Inc. | Automatic refrigerant recovery, purification and recharge apparatus |
| CN202002413U (en) * | 2011-04-14 | 2011-10-05 | 山东科灵新能源发展有限公司 | Air conditioner unit vacuum-pumping fluoridating device |
| EP2712416A1 (en) * | 2011-04-29 | 2014-04-02 | Ecotechnics S.p.a. | Two-fluid apparatus and method for recovering and regenerating refrigerant fluids |
| CN208154890U (en) * | 2018-05-14 | 2018-11-27 | 佛山市顺德区鼎联智能科技有限公司 | One kind vacuumizes and refrigerant charging all-in-one machine |
| CN209326151U (en) * | 2018-11-20 | 2019-08-30 | 深圳市泰路科技有限公司 | A kind of refrigerant motor recycling charging machine |
| CN111649509A (en) * | 2020-05-12 | 2020-09-11 | 浙江飞越机电有限公司 | Intelligent refrigerant filling control system |
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| CN113294947A (en) | 2021-08-24 |
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