CN216897892U - Computer program-controlled automatic pulse tube refrigerator gas distribution system - Google Patents
Computer program-controlled automatic pulse tube refrigerator gas distribution system Download PDFInfo
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- CN216897892U CN216897892U CN202123110423.3U CN202123110423U CN216897892U CN 216897892 U CN216897892 U CN 216897892U CN 202123110423 U CN202123110423 U CN 202123110423U CN 216897892 U CN216897892 U CN 216897892U
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- electromagnetic valve
- pulse tube
- cold head
- valve group
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The utility model provides a computer program-controlled automatic pulse tube refrigerator gas distribution system, which comprises a pulse tube type cold head, a gas compressor, a gas adapter, a first electromagnetic valve group, a second electromagnetic valve group, a PLC (programmable logic controller) and an automatic program-controlled computer, wherein the pulse tube type cold head is provided with a cold head gas conveying main pipe; the gas adapter comprises three ports, wherein a first port is communicated with a cold head conveying gas main pipe, a second port is communicated with the gas outlet pipe through a first electromagnetic valve group, a third port is communicated with the return pipe through a second electromagnetic valve group, the first electromagnetic valve group and the second electromagnetic valve group are electrically connected with the PLC, and the PLC is electrically connected with the automatic program-controlled computer. The air distribution system provided by the utility model can not only ensure that air inlet and air outlet are not interfered with each other and the air distribution is more accurate, but also realize the accurate control of the air inlet and air outlet flow and the opening and closing time phase of the valve.
Description
Technical Field
The utility model relates to the technical field of automatic control of gas distribution systems, in particular to a computer program-controlled automatic pulse tube refrigerator gas distribution system.
Background
The general low frequency air supply refrigerator (frequency is 1.0-2.4Hz) needs to have a rotary distributing valve to control the air intake and exhaust of the pulse tube cold head and provide periodic air source to ensure the normal working cycle of the pulse tube refrigerator. The helium gas reaches the inside of the cold head and is high-pressure gas with low frequency (20-25 atmospheric pressures). The high-pressure gas compressed by the compressor is sent into the cold head through the rotating mechanical rotary valve, and the gas pumped out by the cold head is returned to the compressor through the mechanical rotary valve, so that the performance of the mechanical rotary valve is very strict. Firstly, the end face of the mechanical rotary valve must have good sealing performance and wear resistance, and the rotating part is a component which is easy to damage and needs to be replaced and maintained frequently. Meanwhile, the components of the mechanical rotary valve are expensive parts, which is very disadvantageous to the use cost of the control pulse tube refrigerator. More importantly, the rotary motion of the pulse tube mechanical rotary valve causes a series of problems such as vibration, frictional noise, abrasion and the like.
Accordingly, the prior art is yet to be improved and developed.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned deficiencies of the prior art, the present invention aims to provide a computer program controlled automatic pulse tube refrigerator gas distribution system, which aims to solve the problems of easy wear of parts, poor sealing performance and high maintenance cost of the existing pulse tube refrigerator gas distribution system.
The technical scheme of the utility model is as follows:
the utility model provides a computer programme-controlled automatic pulse tube refrigerator gas distribution system, wherein, including the pulse tube cold head that is provided with cold head conveying gas house steward, be provided with the gas compressor of outlet duct and back flow, be connected with gaseous adapter on the cold head conveying gas house steward, gaseous adapter includes three port, wherein, first port with cold head conveying gas house steward intercommunication, the second port through first electromagnetism valves with the outlet duct intercommunication, the third port pass through second electromagnetism valves with the back flow intercommunication, first electromagnetism valves and second electromagnetism valves all are connected with a PLC controller electricity, the PLC controller is connected with an automatic programme-controlled computer electricity.
The computer program-controlled automatic pulse tube refrigerator gas distribution system is characterized in that the first electromagnetic valve group comprises two electromagnetic valves, and the second electromagnetic valve group comprises two electromagnetic valves.
The computer program-controlled automatic pulse tube refrigerator gas distribution system is characterized in that a primary cold head gas reservoir and a secondary cold head gas reservoir are further arranged on the pulse tube type cold head.
The computer program-controlled automatic pulse tube refrigerator gas distribution system is characterized in that the gas compressor is a helium compressor.
The computer program-controlled automatic pulse tube refrigerator gas distribution system is characterized in that the electromagnetic valve comprises an electromagnetic valve seat, a first interface flange and a second interface flange, the first interface flange and the second interface flange are arranged on the electromagnetic valve seat, a gas inlet channel is arranged in the first interface flange, a gas outlet channel is arranged in the second interface flange, a control valve core capable of moving up and down under the action of a magnetic field is arranged on the gas inlet channel, a magnet coil is arranged on the outer side of the control valve core in a surrounding mode, and the magnet coil is electrically connected with the PLC through a lead.
The computer program-controlled automatic pulse tube refrigerator gas distribution system is characterized in that the control valve core comprises a return spring and an iron rod, wherein one end of the return spring is fixedly arranged, and the iron rod is fixedly connected with the other end of the return spring.
Has the advantages that: the utility model provides a computer program-controlled automatic pulse tube refrigerator gas distribution system, which replaces the existing mechanical rotary valve with a plurality of electromagnetic valve groups, wherein the electromagnetic valve groups are respectively arranged in a gas inlet pipeline and a gas outlet pipeline of a pulse tube type cold head, and the on-off state of each electromagnetic valve group is controlled by an automatic program-controlled computer and a PLC (programmable logic controller), so that the gas inlet and the gas outlet are not interfered with each other, the gas distribution is more accurate, and the accurate control of the gas inlet and outlet flow and the valve opening and closing time phase is realized. The utility model avoids the use of large-size moving parts in the gas distribution process of the pulse tube refrigerator, and has no noise, no interference, no vibration and no mechanical abrasion in the gas distribution process.
Drawings
Fig. 1 is a schematic diagram of a gas distribution system of a computer program-controlled automatic pulse tube refrigerator according to the present invention.
Fig. 2 is a sectional view of the solenoid valve of the present invention.
Detailed Description
The utility model provides a computer program-controlled automatic pulse tube refrigerator gas distribution system, which is further described in detail below in order to make the purpose, technical scheme and effect of the utility model clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a computer program-controlled automatic pulse tube refrigerant distribution system provided in the present invention, and as shown in the figure, the system includes a pulse tube type cold head 2 provided with a cold head gas delivery main 1, a gas compressor 5 provided with a gas outlet tube 3 and a return tube 4, a gas adapter 6, a first electromagnetic valve group 7, a second electromagnetic valve group 8, a PLC controller 9, and an automatic program-controlled computer 10; the gas adapter 6 comprises three ports, wherein a first port 61 is communicated with a cold head conveying gas main pipe 1, a second port 62 is communicated with an air outlet pipe 3 through a first electromagnetic valve group 7, a third port 63 is communicated with a return pipe 4 through a second electromagnetic valve group 8, the first electromagnetic valve group 7 and the second electromagnetic valve group 8 are electrically connected with a PLC controller 9, and the PLC controller 9 is electrically connected with an automatic program-controlled computer 10.
The present embodiment replaces current mechanical rotary valve with two solenoid valve groups, and these solenoid valve groups are installed respectively in the air inlet pipeline and the gas vent pipeline of pulse tube cold head 2, through the on-off situation of automatic program control computer 10 and the every solenoid valve group of PLC controller 9 control, not only can make like this advance, exhaust each other noninterference, and the distribution is more accurate, has also realized simultaneously advancing, the accurate control of exhaust flow and valve switching time phase. In the gas distribution process of the pulse tube refrigerator, the large-size moving part is prevented from being used, and the gas distribution process is noiseless, interference-free, vibration-free and mechanical abrasion-free. The computer program-controlled automatic pulse tube refrigerant gas distribution system provided by the embodiment can also realize remote, real-time and network control, is convenient to maintain, and can replace parts quickly and flexibly.
In some embodiments, as shown in fig. 1, the first solenoid valve set includes two solenoid valves and the second solenoid valve set includes two solenoid valves. Of course, the number of the solenoid valves included in the first solenoid valve group and the second solenoid valve group in this embodiment is not limited to two, and a plurality of solenoid valves can be set according to the precise control degree of the air distribution amount.
In some embodiments, as shown in fig. 1, the pulse tube type cold head 2 is further provided with a primary cold head air reservoir 21 and a secondary cold head air reservoir 22.
In some embodiments, the gas compressor is a helium compressor, and the gas dispensed by the pulse tube type cold head in this embodiment is helium. Of course, the gas compressor in the present embodiment may be a nitrogen compressor, a neon compressor, or the like.
In some embodiments, as shown in fig. 2, the solenoid valve includes a solenoid valve seat 11, a first interface flange 12 and a second interface flange 13 disposed on the solenoid valve seat 11, a gas inlet channel 14 is disposed in the first interface flange 13, a gas outlet channel 15 is disposed in the second interface flange 13, a control valve core 16 movable up and down under the action of a magnetic field is disposed on the gas inlet channel 14, a magnet coil 17 is disposed around the control valve core 16, and the magnet coil 17 is electrically connected to the PLC controller 9 through a wire; the control valve core 16 includes a return spring 161 fixedly disposed at one end and an iron rod 162 fixedly connected to the other end of the return spring 161.
The working principle of the solenoid valve in this embodiment is as follows: the automatic program control computer sends an electric signal to the PLC, the PLC sends the electric signal to the magnet coil through a lead, the magnet coil sends an action signal to the control valve core 16, and the control valve core 16 in the center of the electromagnetic valve moves up and down under the action of a magnetic field, so that the cut-off and the circulation of gas flowing through the electromagnetic valve, different valve opening degrees and the like are controlled. The embodiment mainly constructs a set of brand-new electromagnetic control system to replace the traditional mechanical valve system, and the accurate, time-accurate, timing and gas distribution and time phase grasping of the air inlet valve and the air outlet valve of the pulse tube type cold head are completed by the set of control system.
In some embodiments, based on the computer program-controlled automatic pulse tube refrigerator gas distribution system, the present invention further provides a gas distribution method for a computer program-controlled automatic pulse tube refrigerator, which includes the steps of: when air is supplied to the pulse tube type cold head, the PLC sends an electric signal to the first electromagnetic valve group according to a program set by the automatic program control computer; the first electromagnetic valve group opens corresponding valve opening according to the intensity of the received electric signal, and the gas compressor supplies gas to the pulse tube type cold head through the gas outlet pipe; when the pulse tube type cold head exhausts, the PLC sends an electric signal to the second electromagnetic valve group according to a program set by the automatic program control computer; and the second electromagnetic valve group opens corresponding valve opening according to the received electric signal strength, and the pulse tube type cold head discharges gas to the gas compressor under the action of the air pressure difference.
Specifically, the utility model mainly sends the cooled high-pressure gas provided by the gas compressor into the pulse tube type cold head through the electromagnetic valve group in the gas pipeline; in the same way, in the exhaust pipeline, the return gas (or exhaust gas) returned from the pulse tube type cold head passes through the electromagnetic valve group and then returns to the gas compressor, so that the complete gas distribution process of automatic control of gas inlet and exhaust is formed. In this embodiment, when gas needs to be supplied to the pulse tube type cold head, the PLC controller sends an electric signal to the first electromagnetic valve group according to a program set by the automatic program control computer, the first electromagnetic valve group opens the corresponding electromagnetic valve opening according to the intensity of the received electric signal, high-pressure gas enters the expansion cavity at the top of the pulse tube type cold head to realize expansion, and then enters the pulse tube through the heat regenerator tube, so that the purpose of supplying gas to the pulse tube is achieved.
When the pulse tube type cold head needs to be pumped back and exhausted, the PLC sends an electric signal to the second electromagnetic valve group according to a program set by the automatic program control computer, the second electromagnetic valve group opens corresponding electromagnetic valve opening according to the intensity of the received electric signal, gas is exhausted from the pulse tube type cold head, the first-stage cold head gas storage and the second-stage cold head gas tank, and the gas quickly returns the exhausted gas to the gas compressor through the electromagnetic valve under the action of pressure difference, so that the pulse tube type refrigerator can realize the most critical step of refrigeration cycle.
In summary, the present invention replaces the existing mechanical rotary valve with a plurality of electromagnetic valve sets, the electromagnetic valve sets are respectively installed in the air inlet pipeline and the air outlet pipeline of the pulse tube type cold head, and the opening and closing state of each electromagnetic valve set is controlled by the automatic program control computer and the PLC controller, so that not only the air intake and exhaust are not interfered with each other, the air distribution is more accurate, but also the accurate control of the air intake and exhaust flow and the valve opening and closing time phase is realized. The utility model avoids the use of large-size moving parts in the gas distribution process of the pulse tube refrigerator, and has no noise, no interference, no vibration and no mechanical abrasion in the gas distribution process.
It will be understood that the utility model is not limited to the examples described above, but that modifications and variations will occur to those skilled in the art in light of the above teachings, and that all such modifications and variations are considered to be within the scope of the utility model as defined by the appended claims.
Claims (6)
1. A computer program-controlled automatic pulse tube refrigerator gas distribution system is characterized by comprising a pulse tube type cold head provided with a cold head gas conveying main pipe, a gas compressor provided with a gas outlet pipe and a return pipe, a gas adapter, a first electromagnetic valve group, a second electromagnetic valve group, a PLC (programmable logic controller) and an automatic program-controlled computer; the gas adapter comprises three ports, wherein a first port is communicated with a cold head conveying gas main pipe, a second port is communicated with the gas outlet pipe through a first electromagnetic valve group, a third port is communicated with the return pipe through a second electromagnetic valve group, the first electromagnetic valve group and the second electromagnetic valve group are electrically connected with the PLC, and the PLC is electrically connected with the automatic program-controlled computer.
2. The computer program controlled automatic pulse tube refrigerator gas distribution system of claim 1, wherein the first set of solenoid valves comprises two solenoid valves and the second set of solenoid valves comprises two solenoid valves.
3. The computer program controlled automatic pulse tube refrigerator gas distribution system of claim 1, wherein the pulse tube cold head is further provided with a primary cold head gas reservoir and a secondary cold head gas reservoir.
4. The computer-programmed automatic pulse tube refrigerator gas distribution system of claim 1, wherein the gas compressor is a helium compressor.
5. The computer program-controlled automatic pulse tube refrigerator gas distribution system according to claim 2, wherein the electromagnetic valve comprises an electromagnetic valve seat, and a first interface flange and a second interface flange which are arranged on the electromagnetic valve seat, a gas inlet channel is arranged in the first interface flange, a gas outlet channel is arranged in the second interface flange, a control valve core which can move up and down under the action of a magnetic field is arranged on the gas inlet channel, a magnet coil is arranged around the outer side of the control valve core, and the magnet coil is electrically connected with the PLC through a lead.
6. The computer program controlled automatic pulse tube refrigerator gas distribution system of claim 5, wherein the control valve core comprises a return spring fixedly disposed at one end and an iron rod fixedly connected to the other end of the return spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123110423.3U CN216897892U (en) | 2021-12-07 | 2021-12-07 | Computer program-controlled automatic pulse tube refrigerator gas distribution system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123110423.3U CN216897892U (en) | 2021-12-07 | 2021-12-07 | Computer program-controlled automatic pulse tube refrigerator gas distribution system |
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| CN216897892U true CN216897892U (en) | 2022-07-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114909818A (en) * | 2022-07-18 | 2022-08-16 | 南方科技大学 | Tin separating and combining device for nuclear heat insulation demagnetization refrigeration system |
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2021
- 2021-12-07 CN CN202123110423.3U patent/CN216897892U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114909818A (en) * | 2022-07-18 | 2022-08-16 | 南方科技大学 | Tin separating and combining device for nuclear heat insulation demagnetization refrigeration system |
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