A proportional valve group phase modulation device for a pulse tube refrigerator

Abstract

The application discloses a proportional valve group phase modulation device for a pulse tube refrigerator, comprising a proportional valve group controller, a proportional valve group seat and a plurality of proportional valves installed on the proportional valve group seat, the proportional valve group controller is electrically connected with each proportional valve in the plurality of proportional valves, and the proportional valve group seat is provided with a pipeline for communicating each proportional valve in the plurality of proportional valves; the plurality of proportional valves at least comprise a first primary pulse tube gas reservoir proportional valve, a second primary pulse tube gas reservoir proportional valve, a first primary pulse tube bidirectional gas inlet proportional valve, a second primary pulse tube bidirectional gas inlet proportional valve, a first secondary pulse tube gas reservoir proportional valve, a second secondary pulse tube gas reservoir proportional valve, a first secondary pulse tube bidirectional gas inlet proportional valve and a second secondary pulse tube bidirectional gas inlet proportional valve. The proportional valve group is introduced to replace the needle valve and the small hole as the phase adjustment device of the pulse tube refrigerator, so that the adjustment difficulty of the phase is reduced, the error probability is reduced, the debugging time is shortened, and the production and manufacturing of the pulse tube refrigerator are promoted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pulse tube cryocooler, and particularly relates to a proportional valve group phase modulation device for a pulse tube cryocooler. BACKGROUND

[0002] The pulse tube cryocooler is a new type of regenerative cryocooler, which eliminates the expeller used for phase adjustment in the traditional cryocooler, so that there is no mechanical moving part in the low temperature area, the structure is simplified, the life is improved, and the vibration is low. The phase between the pressure wave and the mass flow in the pulse tube must be adjusted by the phase modulation device at the hot end of the pulse tube, such as a small hole, a needle valve, an inertance tube or a two-way inlet small hole.

[0003] Among them, the 4K pulse tube cryocooler currently mainly adopts a two-stage separated pulse tube structure and a two-way inlet structure, please refer to Figure 1 , which comprises a helium compressor 100, a gas distribution valve 200, a first-stage gas reservoir 310, a second-stage gas reservoir 320, a first-stage pulse tube gas reservoir small hole 410, a second-stage pulse tube gas reservoir small hole 420, a first-stage pulse tube two-way inlet small hole 510, a second-stage pulse tube two-way inlet small hole 520, a first-stage pulse tube 610, a second-stage pulse tube 620, a first-stage regenerator 710, a second-stage regenerator 720 and the like. The first-stage pulse tube gas reservoir small hole 410, the first-stage pulse tube two-way inlet small hole 510, the second-stage pulse tube gas reservoir small hole 420 and the second-stage pulse tube two-way inlet small hole 520 constitute the phase modulation device of the two-way inlet type pulse tube cryocooler. At present, such a phase modulation device is generally realized in two ways in structure:

[0004] 1. The pulse tube cryocooler for laboratory research and development generally adopts an external pipeline connected needle valve, and the phase of the pulse tube cryocooler is adjusted by adjusting the opening degree of the needle valve.

[0005] 2. The commercial pulse tube cryocooler generally adopts a precise small hole installed in the internal of the pulse tube cryocooler. Since the resistance of the regenerator of each pulse tube cryocooler is different due to assembly errors and the like, the diameter of the small hole needs to be adjusted for each pulse tube cryocooler so that the performance of the pulse tube cryocooler at 4K reaches the index requirement.

[0006] The phase of the pulse tube cryocooler is adjusted by adopting an external pipeline connected needle valve and adjusting the opening degree of the needle valve, which has the disadvantages that the needle valve adjustment error is large, the debugging difficulty is high, each needle valve needs to be manually adjusted, and the efficiency is low. In addition, the needle valve and the pipeline are easy to be collided to cause the position to move during packaging or on-site installation, which will affect the phase of the pulse tube cryocooler and needs to be re-adjusted.

[0007] The phase is adjusted by using a precise small hole structure, which is more difficult, and for each pulse tube refrigerator, a pre-designed and shaped precise small hole needs to be installed for testing, and then according to the test results, a suitable precise small hole or position is replaced; each replacement needs to wait for the pulse tube refrigerator to warm up, and then the replacement is carried out, and then vacuumization, gas replacement, and recooling test are carried out, which needs to consume a considerable long time.

[0008] Whether the phase of the pulse tube refrigerator is adjusted by using an external pipeline connected needle valve to adjust the opening of the needle valve or by using a precise small hole structure, the difficulty is high, errors are easy to occur, a large amount of time is consumed, experienced personnel are needed, and the production and manufacturing of the pulse tube refrigerator are not conducive. SUMMARY

[0009] The purpose of the present application is to overcome the shortcomings of the prior art, and the present application provides a proportional valve group phase adjusting device for a pulse tube refrigerator, which introduces a proportional valve group to replace a needle valve and a small hole as a phase adjusting device of the pulse tube refrigerator, reduces the adjustment difficulty of the phase of the pulse tube refrigerator, reduces the error probability, shortens the debugging time, and is conducive to promoting the production and manufacturing of the pulse tube refrigerator.

[0010] The present application provides a proportional valve group phase adjusting device for a pulse tube refrigerator, which comprises a proportional valve group controller, a proportional valve group seat and a plurality of proportional valves installed on the proportional valve group seat, the proportional valve group controller is electrically connected with each proportional valve in the plurality of proportional valves, and the proportional valve group seat is provided with a pipeline for communicating each proportional valve in the plurality of proportional valves;

[0011] The plurality of proportional valves at least comprises a first primary pulse tube gas reservoir proportional valve, a second primary pulse tube gas reservoir proportional valve, a first primary pulse tube bidirectional gas inlet proportional valve, a second primary pulse tube bidirectional gas inlet proportional valve, a first secondary pulse tube gas reservoir proportional valve, a second secondary pulse tube gas reservoir proportional valve, a first secondary pulse tube bidirectional gas inlet proportional valve and a second secondary pulse tube bidirectional gas inlet proportional valve;

[0012] The first primary pulse tube gas reservoir proportional valve and the second primary pulse tube gas reservoir proportional valve are used for connecting a primary pulse tube and a primary gas reservoir, and the first primary pulse tube gas reservoir proportional valve and the second primary pulse tube gas reservoir proportional valve are arranged in parallel; the first primary pulse tube bidirectional gas inlet proportional valve and the second primary pulse tube bidirectional gas inlet proportional valve are used for connecting a primary pulse tube and a gas distribution valve, and the first primary pulse tube bidirectional gas inlet proportional valve and the second primary pulse tube bidirectional gas inlet proportional valve are arranged in parallel;

[0013] The first secondary pipeline gas reservoir proportional valve and the second secondary pipeline gas reservoir proportional valve are used to connect the secondary pipeline and the secondary gas reservoir, and the first secondary pipeline gas reservoir proportional valve and the second secondary pipeline gas reservoir proportional valve are arranged in parallel.

[0014] Specifically, the directions of the gas inlet of the first primary pipeline gas reservoir proportional valve and the gas inlet of the second primary pipeline gas reservoir proportional valve are opposite.

[0015] Specifically, the directions of the gas inlet of the first primary pipeline bidirectional gas proportional valve and the gas inlet of the second primary pipeline bidirectional gas proportional valve are opposite.

[0016] Specifically, the directions of the gas inlet of the first secondary pipeline gas reservoir proportional valve and the gas inlet of the second secondary pipeline gas reservoir proportional valve are opposite.

[0017] Specifically, the directions of the gas inlet of the first secondary pipeline bidirectional gas proportional valve and the gas inlet of the second secondary pipeline bidirectional gas proportional valve are opposite.

[0018] Specifically, the plurality of proportional valves further comprises a third primary pipeline bidirectional gas proportional valve, the third primary pipeline bidirectional gas proportional valve is used to connect the primary pipeline and the gas distribution valve, and the first primary pipeline bidirectional gas proportional valve, the second primary pipeline bidirectional gas proportional valve and the third primary pipeline bidirectional gas proportional valve are arranged in parallel.

[0019] And / or the plurality of proportional valves further comprises a third secondary pipeline bidirectional gas proportional valve, the third secondary pipeline bidirectional gas proportional valve is used to connect the secondary pipeline and the gas distribution valve, and the first secondary pipeline bidirectional gas proportional valve, the second secondary pipeline bidirectional gas proportional valve and the third secondary pipeline bidirectional gas proportional valve are arranged in parallel.

[0020] Specifically, the directions of the gas inlets of at least one of the first primary pipeline bidirectional gas proportional valve, the second primary pipeline bidirectional gas proportional valve and the third primary pipeline bidirectional gas proportional valve are opposite.

[0021] Specifically, the directions of the gas inlets of at least one of the first secondary pipeline bidirectional gas proportional valve, the second secondary pipeline bidirectional gas proportional valve and the third secondary pipeline bidirectional gas proportional valve are opposite.

[0022] Specifically, the diameter range of each proportional valve in the plurality of proportional valves is 0.3-2.0 mm.

[0023] Specifically, the pipeline comprises:

[0024] The first-stage pulse tube gas reservoir parallel pipeline is provided with a first-stage pulse tube connecting port and a first-stage gas reservoir connecting port.

[0025] The first-stage pulse tube two-way gas inlet parallel pipeline is in communication with the first-stage pulse tube gas reservoir parallel pipeline.

[0026] The second-stage pulse tube gas reservoir parallel pipeline is provided with a second-stage pulse tube connecting port and a second-stage gas reservoir connecting port.

[0027] The second-stage pulse tube two-way gas inlet parallel pipeline is in communication with the second-stage pulse tube gas reservoir parallel pipeline.

[0028] The main gas inlet and outlet pipeline is in communication with the first-stage pulse tube two-way gas inlet parallel pipeline and the second-stage pulse tube two-way gas inlet parallel pipeline, and is provided with a gas inlet and outlet connecting port for connecting a gas distribution valve.

[0029] Compared with the prior art, the present application has the following beneficial effects:

[0030] The proportioning valve group is introduced to replace the needle valve and the small hole as the phase adjusting device of the pulse tube refrigerator, a plurality of proportioning valves are installed on the proportioning valve group seat to form the proportioning valve group, which is centralized and compact, and is convenient for connection with the proportioning valve group controller, the proportioning valve group controller is electrically connected with each proportioning valve on the proportioning valve group seat, each proportioning valve can be instantaneously adjusted through the proportioning valve group controller, so that the phase of the pulse tube refrigerator is instantaneously adjusted, the accuracy is high, the response speed is fast, the stability is good, the pulse tube refrigerator is not easily affected by the outside world, and the opening of each proportioning valve can be adjusted through the proportioning valve group controller without disassembling the machine, the adjustment difficulty of the phase of the pulse tube refrigerator is effectively reduced, the error probability in the phase adjustment process of the pulse tube refrigerator is reduced, the phase adjustment time of the pulse tube refrigerator is greatly shortened, the phase adjustment efficiency of the pulse tube refrigerator is effectively improved, and the production and manufacturing of the pulse tube refrigerator are promoted. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative effort.

[0032] Figure 1 is a structural schematic diagram of an existing pulse tube refrigerator;

[0033] Figure 2 is a first structural schematic diagram of a pulse tube refrigerator in an embodiment of the present application;

[0034] Figure 3 is a second structural schematic diagram of a pulse tube refrigerator in an embodiment of the present application;

[0035] Figure 4 is a first structural schematic diagram of a proportional valve group phase adjusting device in an embodiment of the present application;

[0036] Figure 5 is a second structural schematic diagram of a proportional valve group phase adjusting device in an embodiment of the present application.

[0037] In the drawings, 100, helium compressor; 200, gas distribution valve; 310, primary gas reservoir; 320, secondary gas reservoir; 400, proportional valve group controller; 410, primary pulse tube gas reservoir small hole; 411, first primary pulse tube gas reservoir proportional valve; 412, second primary pulse tube gas reservoir proportional valve; 420, secondary pulse tube gas reservoir small hole; 421, first secondary pulse tube gas reservoir proportional valve; 422, second secondary pulse tube gas reservoir proportional valve; 500, proportional valve group seat; 510, primary pulse tube bidirectional inlet small hole; 511, first primary pulse tube bidirectional inlet proportional valve; 512, second primary pulse tube bidirectional inlet proportional valve; 513, third primary pulse tube bidirectional inlet proportional valve; 520, secondary pulse tube bidirectional inlet small hole; 521, first secondary pulse tube bidirectional inlet proportional valve; 522, second secondary pulse tube bidirectional inlet proportional valve; 523, third secondary pulse tube bidirectional inlet proportional valve; 530, primary pulse tube gas reservoir parallel pipeline; 531, primary pulse tube connecting port; 532, primary gas reservoir connecting port; 540, primary pulse tube bidirectional inlet parallel pipeline; 550, secondary pulse tube gas reservoir parallel pipeline; 551, secondary pulse tube connecting port; 552, secondary gas reservoir connecting port; 560, secondary pulse tube bidirectional inlet parallel pipeline; 570, main inlet and return pipeline; 571, inlet and return connecting port; 610, primary pulse tube; 620, secondary pulse tube; 710, primary regenerator; 720, secondary regenerator. DETAILED DESCRIPTION

[0038] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts under the premise that no creative efforts are made, fall within the protection scope of the present application.

[0039] The present application provides a proportional valve group phase adjusting device for a pulse tube refrigerator, referring to Figure 2 The proportional valve group phase adjusting device comprises a proportional valve group controller 400, a proportional valve group seat 500, and a plurality of proportional valves installed on the proportional valve group seat 500, the proportional valve group controller 400 is electrically connected with each proportional valve in the plurality of proportional valves, and the proportional valve group seat 500 is provided with a pipeline for communicating each proportional valve in the plurality of proportional valves.

[0040] The proportional valve can accurately adjust the gas flow by adjusting the size of the input control current, thereby realizing accurate control of the flow and pressure, the proportional valve has fast response speed, long service life, small and compact structure, and multiple flow diameters, and the opening of each proportional valve in the plurality of proportional valves can be accurately controlled by the proportional valve group controller 400.

[0041] The proportional valve group is introduced to replace the needle valve and the small hole as the phase adjusting device of the pulse tube refrigerator, the plurality of proportional valves are installed on the proportional valve group seat 500 to form the proportional valve group, which is centralized and compact, and is convenient for being connected with the proportional valve group controller 400, the proportional valve group controller 400 is electrically connected with each proportional valve on the proportional valve group seat 500, each proportional valve can be instantaneously adjusted by the proportional valve group controller 400, so that the phase of the pulse tube refrigerator is instantaneously adjusted, the accuracy is high, the response speed is fast, the stability is good, the pulse tube refrigerator is not easily affected by the outside world, and the opening of each proportional valve can be adjusted by the proportional valve group controller 400 without disassembling the machine, the difficulty of adjusting the phase of the pulse tube refrigerator is effectively reduced, the probability of error in the process of adjusting the phase of the pulse tube refrigerator is reduced, the adjustment time of the phase of the pulse tube refrigerator is greatly shortened, the phase adjusting efficiency of the pulse tube refrigerator is effectively improved, and the production and manufacturing of the pulse tube refrigerator are promoted.

[0042] Further, referring to Figure 2The several proportional valves at least include a first primary pulse tube gas reservoir proportional valve 411, a second primary pulse tube gas reservoir proportional valve 412, a first primary pulse tube bidirectional gas inlet proportional valve 511, a second primary pulse tube bidirectional gas inlet proportional valve 512, a first secondary pulse tube gas reservoir proportional valve 421, a second secondary pulse tube gas reservoir proportional valve 422, a first secondary pulse tube bidirectional gas inlet proportional valve 521, and a second secondary pulse tube bidirectional gas inlet proportional valve 522. The first primary pulse tube gas reservoir proportional valve 411 and the second primary pulse tube gas reservoir proportional valve 412 are used to connect the primary pulse tube 610 and the primary gas reservoir 310, and are arranged in parallel. The first primary pulse tube bidirectional gas inlet proportional valve 511 and the second primary pulse tube bidirectional gas inlet proportional valve 512 are used to connect the primary pulse tube 610 and the gas distribution valve 200, and are arranged in parallel. The first secondary pulse tube gas reservoir proportional valve 421 and the second secondary pulse tube gas reservoir proportional valve 422 are used to connect the secondary pulse tube 620 and the secondary gas reservoir 320, and are arranged in parallel. The first secondary pulse tube bidirectional gas inlet proportional valve 521 and the second secondary pulse tube bidirectional gas inlet proportional valve 522 are used to connect the secondary pulse tube 620 and the gas distribution valve 200, and are arranged in parallel.

[0043] The parallel arrangement of the proportional valves between the primary pulse tube 610 and the primary gas reservoir 310, between the primary pulse tube 610 and the gas distribution valve 200, between the secondary pulse tube 620 and the secondary gas reservoir 320, and between the secondary pulse tube 620 and the gas distribution valve 200 can improve the refrigeration efficiency of the pulse tube refrigerator and enhance the refrigeration effect of the pulse tube refrigerator.

[0044] In some embodiments, referring to Figure 2 The gas inlet of the first primary pulse tube gas reservoir proportional valve 411 and the gas inlet of the second primary pulse tube gas reservoir proportional valve 412 are in opposite directions, and the gas inlet of the first primary pulse tube bidirectional gas inlet proportional valve 511 and the gas inlet of the second primary pulse tube bidirectional gas inlet proportional valve 512 are in opposite directions. The gas inlet of the first secondary pulse tube gas reservoir proportional valve 421 and the gas inlet of the second secondary pulse tube gas reservoir proportional valve 422 are in opposite directions, and the gas inlet of the first secondary pulse tube bidirectional gas inlet proportional valve 521 and the gas inlet of the second secondary pulse tube bidirectional gas inlet proportional valve 522 are in opposite directions.

[0045] The direct current in the bidirectional gas inlet phase adjusting structure can affect the refrigeration temperature, waste part of the refrigeration capacity, and reduce the stability of the pulse tube refrigerator operation state, hindering the practical process of the pulse tube refrigerator; the proportional valve with opposite gas inlet directions is arranged as the bidirectional gas inlet phase adjusting structure, which can effectively reduce the direct current, reduce the cold loss, improve the refrigeration efficiency of the pulse tube refrigerator, and enhance the operation stability of the pulse tube refrigerator, and is beneficial to the practicalization and commercialization of the pulse tube refrigerator.

[0046] In some specific embodiments, referring to Figure 3 , the plurality of proportional valves further include a third primary pulse tube bidirectional gas inlet proportional valve 513 for connecting a primary pulse tube 610 and a gas distribution valve 200, and the first primary pulse tube bidirectional gas inlet proportional valve 511, the second primary pulse tube bidirectional gas inlet proportional valve 512 and the third primary pulse tube bidirectional gas inlet proportional valve 513 are arranged in parallel; the plurality of proportional valves further include a third secondary pulse tube bidirectional gas inlet proportional valve 523 for connecting a secondary pulse tube 620 and the gas distribution valve 200, and the first secondary pulse tube bidirectional gas inlet proportional valve 521, the second secondary pulse tube bidirectional gas inlet proportional valve 522 and the third secondary pulse tube bidirectional gas inlet proportional valve 523 are arranged in parallel.

[0047] The proportional valve has high precision characteristics, and the flow precision of the proportional valve can reach one percent or one thousandth, and by arranging multiple proportional valves in parallel to connect the pulse tube and the gas distribution valve 200, the phase of the pulse tube refrigerator can be adjusted faster and more accurately, so that the refrigeration performance of the pulse tube refrigerator reaches a better state.

[0048] Further, the direction of the gas inlet of at least one of the first primary pulse tube bidirectional gas inlet proportional valve 511, the second primary pulse tube bidirectional gas inlet proportional valve 512 and the third primary pulse tube bidirectional gas inlet proportional valve 513 is opposite; the direction of the gas inlet of at least one of the first secondary pulse tube bidirectional gas inlet proportional valve 521, the second secondary pulse tube bidirectional gas inlet proportional valve 522 and the third secondary pulse tube bidirectional gas inlet proportional valve 523 is opposite.

[0049] At least one proportional valve with opposite gas inlet directions is arranged in the multiple proportional valves arranged in parallel, which can effectively reduce the direct current in the bidirectional gas inlet phase adjusting structure, reduce the cold loss, improve the refrigeration efficiency of the pulse tube refrigerator, and enhance the operation stability of the pulse tube refrigerator, and is beneficial to the practicalization and commercialization of the pulse tube refrigerator.

[0050] In some specific embodiments, the size range of each proportional valve in the plurality of proportional valves is 0.3-2.0 mm, which is suitable for adjusting the flow of gas, has high accuracy and good stability.

[0051] In some specific embodiments, see Figure 4 , the pipeline includes:

[0052] The first-level pulse tube gas reservoir parallel pipeline 530 is installed with at least the first-level pulse tube gas reservoir proportional valve 411 and the second-level pulse tube gas reservoir proportional valve 412 in parallel. The first-level pulse tube gas reservoir parallel pipeline 530 is provided with a first-level pulse tube connection port 531 and a first-level gas reservoir connection port 532;

[0053] The first-level pulse tube bidirectional air intake parallel pipeline 540 is equipped with at least the first-level pulse tube bidirectional air intake proportional valve 511 and the second-level pulse tube bidirectional air intake proportional valve 512 in parallel. The first-level pulse tube bidirectional air intake parallel pipeline 540 is connected to the first-level pulse tube gas reservoir parallel pipeline 530;

[0054] The secondary pulse tube gas reservoir parallel pipeline 550 is installed with at least the first secondary pulse tube gas reservoir proportional valve 421 and the second secondary pulse tube gas reservoir proportional valve 422 in parallel, and the secondary pulse tube gas reservoir parallel pipeline 550 is provided with a secondary pulse tube connection port 551 and a secondary gas reservoir connection port 552;

[0055] The secondary pulse tube bidirectional air intake parallel pipeline 560 is installed with at least the first secondary pulse tube bidirectional air intake proportional valve 521 and the second secondary pulse tube bidirectional air intake proportional valve 522 in parallel. The secondary pulse tube bidirectional air intake parallel pipeline 560 is connected to the secondary pulse tube gas reservoir parallel pipeline 550;

[0056] The main air inlet and return pipe 570, the first-level pulse tube bidirectional air inlet parallel pipe 540 and the second-level pulse tube bidirectional air inlet parallel pipe 560 are all connected to the main air inlet and return pipe 570, and the main air inlet and return pipe 570 is provided with an air inlet and return connecting port 571, and the air inlet and return connecting port 571 is used to connect the air distribution valve 200.

[0057] The proportional valve assembly seat 500 brings together the proportional valves to form a proportional valve assembly phase adjustment device. Corresponding proportional valves are installed in parallel on each pipeline, resulting in a compact structure. Furthermore, corresponding connection ports for accessing a pulse tube refrigerator are provided therein, allowing the proportional valve assembly phase adjustment device to be assembled in a modular manner. This simplifies the pipeline connection process, facilitates the packaging and installation of the proportional valve assembly phase adjustment device, and is beneficial to improving the manufacturing efficiency of the pulse tube refrigerator. Furthermore, the compact proportional valve assembly phase adjustment device can reduce the resistance to gas flow and improve the accuracy of phase adjustment.

[0058] In some specific embodiments, see Figure 5, the first primary pulse pipe two-way gas inlet parallel pipeline 540 is provided with the first primary pulse pipe two-way gas inlet proportional valve 511, the second primary pulse pipe two-way gas inlet proportional valve 512 and the third primary pulse pipe two-way gas inlet proportional valve 513 in parallel, the second primary pulse pipe two-way gas inlet parallel pipeline 560 is provided with the first second primary pulse pipe two-way gas inlet proportional valve 521, the second second primary pulse pipe two-way gas inlet proportional valve 522 and the third second primary pulse pipe two-way gas inlet proportional valve 523 in parallel, the proportional valve has high precision characteristics, and the flow precision of the proportional valve can reach one percent, one thousandth, the phase of the pulse tube refrigerator can be adjusted more quickly and more accurately by connecting the pulse tube and the gas distribution valve 200 through the parallel arrangement of multiple proportional valves, and the refrigeration performance of the pulse tube refrigerator reaches a better state.

[0059] The proportional valve group phase modulation device of the application introduces a proportional valve group to replace the needle valve and small hole as the phase modulation device of the pulse tube refrigerator, a plurality of proportional valves are installed on the proportional valve group seat 500 to form a proportional valve group, which is centralized and compact, and is convenient to connect with the proportional valve group controller 400, the proportional valve group controller 400 is electrically connected with each proportional valve on the proportional valve group seat 500, the proportional valve can accurately adjust the gas flow by adjusting the size of the input control current, thereby realizing accurate control of the flow and pressure, the proportional valve has the advantages of fast response speed, long service life, small and compact structure, and multiple flow diameters, the opening of each proportional valve in the proportional valve group can be accurately controlled and adjusted in real time through the proportional valve group controller 400, so that the phase of the pulse tube refrigerator is accurately and instantly adjusted, the accuracy is high, the response speed is fast, the stability is good, the pulse tube refrigerator is not easily affected by the outside world, and the opening of each proportional valve can be adjusted through the proportional valve group controller 400 without disassembling the machine, thereby effectively reducing the difficulty of adjusting the phase of the pulse tube refrigerator, reducing the error probability in the process of adjusting the phase of the pulse tube refrigerator, greatly shortening the phase adjustment time of the pulse tube refrigerator, effectively improving the phase adjustment efficiency of the pulse tube refrigerator, and being conducive to promoting the production and manufacturing of the pulse tube refrigerator.

[0060] In addition, the proportional valve has high precision characteristics, and the flow precision of the proportional valve can reach one percent, one thousandth, the phase of the pulse tube refrigerator can be adjusted more quickly and more accurately by connecting the pulse tube and the gas reservoir, connecting the pulse tube and the gas distribution valve 200 through the parallel arrangement of multiple proportional valves, so that the refrigeration performance of the pulse tube refrigerator reaches a better state, the refrigeration efficiency of the pulse tube refrigerator is improved, and the refrigeration effect of the pulse tube refrigerator is enhanced; moreover, at least one proportional valve with opposite gas inlet directions is arranged in the parallel proportional valves, which can effectively reduce the direct current in the two-way gas inlet phase modulation structure, reduce the cold loss, improve the refrigeration efficiency of the pulse tube refrigerator, enhance the operation stability of the pulse tube refrigerator, and be conducive to the practicality and commercialization of the pulse tube refrigerator.

[0061] The proportional valve group phase modulation device is compact in structure, convenient for modular assembly of the proportional valve group phase modulation device, simplifies the pipeline connection process, is convenient for packaging and installation of the proportional valve group phase modulation device, and is favorable for improving the production and manufacturing efficiency of the pulse tube refrigerator; and the compact proportional valve group phase modulation device can reduce the resistance of gas flow and improve the accuracy of phase adjustment; by using the proportional valve group phase modulation device, the opening parameters of each proportional valve can be set after debugging of the pulse tube refrigerator, and the opening parameters will not be easily changed by external influences, thereby facilitating effective operation of the pulse tube refrigerator.

[0062] The proportional valve group phase modulation device for the pulse tube refrigerator is described in detail above, and the principle and implementation mode of the present application are described by using specific examples in this paper; the above description of the embodiments is only used for helping to understand the method and core idea of the present application; meanwhile, according to the idea of the present application, the specific implementation mode and application range will be changed by those skilled in the art, and the above description should not be understood as a limitation of the present application.

Claims

1. A proportional valve group phase modulation device for a pulse tube refrigerator, characterized by, The proportional valve group phase modulation device comprises a proportional valve group controller, a proportional valve group seat, and a plurality of proportional valves mounted on the proportional valve group seat, the plurality of proportional valves are mounted on the same face of the proportional valve group seat, the proportional valve group controller is electrically connected with each proportional valve in the plurality of proportional valves, and the proportional valve group seat is provided with pipelines for communicating each proportional valve in the plurality of proportional valves; The plurality of proportional valves at least comprise a first primary pulse pipe gas reservoir proportional valve, a second primary pulse pipe gas reservoir proportional valve, a first primary pulse pipe bidirectional gas inlet proportional valve, a second primary pulse pipe bidirectional gas inlet proportional valve, a first secondary pulse pipe gas reservoir proportional valve, a second secondary pulse pipe gas reservoir proportional valve, a first secondary pulse pipe bidirectional gas inlet proportional valve, and a second secondary pulse pipe bidirectional gas inlet proportional valve. The first primary pulse pipe gas reservoir proportional valve and the second primary pulse pipe gas reservoir proportional valve are used for connecting a primary pulse pipe and a primary gas reservoir, and the first primary pulse pipe gas reservoir proportional valve and the second primary pulse pipe gas reservoir proportional valve are arranged in parallel. The first primary pulse pipe bidirectional gas inlet proportional valve and the second primary pulse pipe bidirectional gas inlet proportional valve are used for connecting a primary pulse pipe and a gas distribution valve, and the first primary pulse pipe bidirectional gas inlet proportional valve and the second primary pulse pipe bidirectional gas inlet proportional valve are arranged in parallel. The first secondary pulse pipe gas reservoir proportional valve and the second secondary pulse pipe gas reservoir proportional valve are used for connecting a secondary pulse pipe and a secondary gas reservoir, and the first secondary pulse pipe gas reservoir proportional valve and the second secondary pulse pipe gas reservoir proportional valve are arranged in parallel. The first secondary pulse pipe bidirectional gas inlet proportional valve and the second secondary pulse pipe bidirectional gas inlet proportional valve are used for connecting a secondary pulse pipe and a gas distribution valve, and the first secondary pulse pipe bidirectional gas inlet proportional valve and the second secondary pulse pipe bidirectional gas inlet proportional valve are arranged in parallel.

2. The proportional valve bank phasing apparatus of claim 1, wherein The plurality of proportional valves further comprise a third primary pulse pipe bidirectional gas inlet proportional valve, the third primary pulse pipe bidirectional gas inlet proportional valve is used for connecting a primary pulse pipe and a gas distribution valve, and the first primary pulse pipe bidirectional gas inlet proportional valve, the second primary pulse pipe bidirectional gas inlet proportional valve, and the third primary pulse pipe bidirectional gas inlet proportional valve are arranged in parallel.

3. The proportioning valve bank phasing apparatus of claim 1 wherein, The plurality of proportional valves further comprise a third secondary pulse pipe bidirectional gas inlet proportional valve, the third secondary pulse pipe bidirectional gas inlet proportional valve is used for connecting a secondary pulse pipe and a gas distribution valve, and the first secondary pulse pipe bidirectional gas inlet proportional valve, the second secondary pulse pipe bidirectional gas inlet proportional valve, and the third secondary pulse pipe bidirectional gas inlet proportional valve are arranged in parallel.

4. The proportional valve bank phasing apparatus of claim 1, wherein The gas inlet of the first primary pulse pipe gas reservoir proportional valve and the gas inlet of the second primary pulse pipe gas reservoir proportional valve are in opposite directions.

5. The proportioning valve bank phasing apparatus of claim 1 wherein, The gas inlet of the first primary pulse pipe bidirectional gas inlet proportional valve and the gas inlet of the second primary pulse pipe bidirectional gas inlet proportional valve are in opposite directions.

6. The proportional valve bank phasing apparatus of claim 1, wherein The gas inlet of the first secondary pulse pipe gas reservoir proportional valve and the gas inlet of the second secondary pulse pipe gas reservoir proportional valve are in opposite directions. The gas inlet of the first secondary pulse pipe bidirectional gas inlet proportional valve and the gas inlet of the second secondary pulse pipe bidirectional gas inlet proportional valve are in opposite directions. The gas inlets of at least one proportional valve in the first primary pulse pipe bidirectional gas inlet proportional valve, the second primary pulse pipe bidirectional gas inlet proportional valve, and the third primary pulse pipe bidirectional gas inlet proportional valve are in opposite directions.

7. The proportional valve bank phasing apparatus of claim 1, wherein The direction of the air inlet of at least one of the first secondary pipeline bidirectional air inlet proportional valve, the second secondary pipeline bidirectional air inlet proportional valve and the third secondary pipeline bidirectional air inlet proportional valve is opposite.

8. The proportional valve bank phasing apparatus of claim 1, wherein The flow diameter of each of the plurality of proportional valves ranges from 0.3 mm to 2.0 mm.

9. The proportional valve bank phasing apparatus of claim 1, wherein The pipeline comprises: The primary pipeline gas reservoir parallel pipeline is provided with a primary pipeline connecting port and a primary gas reservoir connecting port. The primary pipeline bidirectional air inlet parallel pipeline is in communication with the primary pipeline gas reservoir parallel pipeline. The secondary pipeline gas reservoir parallel pipeline is provided with a secondary pipeline connecting port and a secondary gas reservoir connecting port. The secondary pipeline bidirectional air inlet parallel pipeline is in communication with the secondary pipeline gas reservoir parallel pipeline. The main air inlet and outlet pipeline is communicated by the primary pipeline bidirectional air inlet parallel pipeline and the secondary pipeline bidirectional air inlet parallel pipeline, and is provided with an air inlet and outlet connecting port for connecting a gas distribution valve.

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