CN115183491A - Active phase-modulation type pulse tube refrigerator double-compressor drive control system - Google Patents
Active phase-modulation type pulse tube refrigerator double-compressor drive control system Download PDFInfo
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- CN115183491A CN115183491A CN202210519298.1A CN202210519298A CN115183491A CN 115183491 A CN115183491 A CN 115183491A CN 202210519298 A CN202210519298 A CN 202210519298A CN 115183491 A CN115183491 A CN 115183491A
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- compressor
- phase modulation
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- pulse tube
- active phase
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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
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/14—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle
- F25B9/145—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle pulse-tube cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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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
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/14—Compression machines, plants or systems characterised by the cycle used
- F25B2309/1411—Pulse-tube cycles characterised by control details, e.g. tuning, phase shifting or general control
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- Engineering & Computer Science (AREA)
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- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention discloses an active phase modulation type pulse tube refrigerator dual-compressor drive control system which comprises a power amplifier, a PID control module, a pressure sensor, a temperature sensor, a data acquisition module and a dual-channel output module. When the performance parameters of the refrigerating machine change, the analog signals are input into the data acquisition module through the sensor, then the feedback control is carried out on the dual-channel output module through the PID control module, and finally the adjustment of the output parameters of the two compressors is completed, so that the temperature of the cold head is stabilized. The invention realizes the integrated feedback control of the double compressors of the active phase modulation type pulse tube refrigerator, effectively reduces the cold head temperature oscillation, simplifies the drive control link of the active phase modulation type pulse tube refrigerator, leads the structure of the whole machine to be more compact and is beneficial to the application and popularization of the active phase modulation type pulse tube refrigerator.
Description
Technical Field
The invention relates to the technical field of refrigeration and low-temperature engineering and the field of circuit systems, in particular to a driving control system for double compressors of an active phase modulation type pulse tube refrigerator.
Background
The pulse tube refrigerator is a great innovation of a regenerative low-temperature refrigerator, has the outstanding advantages of high reliability, small mechanical vibration, long service life, high refrigeration efficiency, low electromagnetic noise and the like, and is widely applied to the aspects of aerospace, low-temperature electronics, superconducting industry, low-temperature medical industry and the like. Since Gifford and Longsworth invented basic pulse tube refrigerators in the us of the 60 th century, the development of pulse tube refrigerators went through various phase modulation modes such as a small hole-gas reservoir type, a bidirectional gas inlet type, an inertia tube type, a double piston type, an active gas reservoir type and the like.
In the practical application of the pulse tube refrigerator, many cooled devices such as an infrared detector, a superconducting electronic device and the like need a low-temperature environment with high stability so as to ensure the detection precision and sensitivity. The performance of the cooled device is usually sensitive to the operating temperature, and the external disturbance often causes the working condition of the refrigerator to change to a certain extent, thereby affecting the refrigerating temperature and the performance of the cooled device. In the practical application of pulse tube refrigerators, it is therefore often necessary to vary the output parameters of the compressor in response to changes in the operating environment so that the cold head temperature is maintained within a specified range. In addition, some special applications of the pulse tube refrigerator, such as aerospace environment, only have direct current power supplies, and a driving control structure must be designed for a direct current power supply system; meanwhile, the stability of the cold head of the pulse tube refrigerator is closely related to the performance of the driving system, so that urgent needs are provided for the driving control system with high precision and high flexibility.
As shown in fig. 1, the active phase modulation type pulse tube refrigerator is a double-piston type refrigerator, and its basic principle is to add an ejector (which can realize the ejector function in the low-temperature cylinder in the stirling refrigerator) at the room temperature end, and make it expand and compress with the main compressor with a fixed phase difference, thereby flexibly adjusting the phase in the pulse tube. The structure has the advantages that irreversible loss caused by the phase modulation mechanism is reduced, so that expansion work can be recovered, and the refrigeration efficiency of the refrigerator at low temperature is effectively improved. However, since an expansion piston is added as a movable part, the two compressors need to be driven and controlled and output parameters need to be adjusted at the same time, the reliability of the pulse tube and the stability of the cold head temperature at low temperature are reduced to a certain extent, and the design difficulty of a stable active control system is increased. Meanwhile, an independent control circuit is required to be provided for the driving piston, so that the overall size and the control difficulty of the refrigerating machine system are increased.
Therefore, the development of the active phase modulation type pulse tube refrigerator double-compressor driving control system with small volume and high precision has practical significance.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the active phase modulation type pulse tube refrigerator double-compressor driving control system which is small in size, high in precision and capable of realizing active regulation, and overcomes the defects that an existing active phase modulation type pulse tube refrigerator system is large in size and low in control precision.
In order to achieve the purpose, the invention provides the following technical scheme:
a driving control system for two compressors of an active phase modulation type pulse tube refrigerator comprises a driving compressor, a refrigerator cold head, a regenerator hot end, a pulse tube hot end and an active phase modulation compressor;
the system also comprises a power amplifier I, a driving compressor, a power amplifier II, a PID control module II, a pressure sensor II, a temperature sensor, a data acquisition module, a pressure sensor I, a PID control module I and a double-channel output module;
the temperature sensor is used for acquiring the temperature of a cold head of the refrigerator, and the first pressure sensor and the second pressure sensor are respectively used for acquiring the pressure of the driving compressor and the pressure of the active phase modulation compressor;
the double-channel output module is connected with the driving compressor through a first power amplifier, the double-channel output module is connected with the active phase modulation compressor through a second power amplifier, the double-channel output module outputs two signal waves with fixed phase difference, and the two signal waves are amplified through the first power amplifier and the second power amplifier and respectively drive the driving compressor and the active phase modulation compressor;
the data acquisition module is connected with the temperature sensor, the pressure sensor I and the pressure sensor II respectively to acquire signals transmitted by the temperature sensor, the pressure sensor I and the pressure sensor II, and the data acquisition module is connected with the dual-channel output module through the PID control module I and the PID control module II respectively to complete feedback control over the driving compressor and the active phase modulation compressor.
Specifically, for a specific refrigeration working condition, a specific working state correspondingly exists in the two compressors, so that the working temperature of the cold head is constant, when the cold head generates micro disturbance due to external environment change or the output parameters of the driving compressor and the active phase modulation compressor change due to long-time working, the temperature of the cold head may oscillate, and at the moment, the temperature sensor, the pressure sensor I and the pressure sensor II convert measured analog signals into voltage signals through the bridge circuit and input the voltage signals into the data acquisition module. After the change of signal is discerned, data acquisition module amplifies the analog voltage signal and converts the analog voltage signal into digital signal, and through PID control module one and PID control module two, to binary channels output module input digital control signal, after receiving the signal, binary channels output module converts new digital control signal into analog control signal, and adjust two way sinusoidal signal ripples to the output, accomplish the feedback control to two compressors, thereby stabilize the cold head temperature, thereby constitute a high efficiency jointly, stable two compressor drive control systems of initiative phase modulation type pulse tube refrigerator.
The invention provides an electric control system for simultaneously realizing active drive control of two linear compressors, which can integrate two originally independent drive power supplies in the prior art into the same direct-current power supply electric control system, realize high-efficiency stable combined drive of the two linear compressors, and realize active regulation and control of input parameters of the compressors through temperature and pressure signal feedback of a cold head of a refrigerating machine, thereby accurately controlling the temperature of the cold head.
As a preferable technical scheme:
according to the active phase modulation type pulse tube refrigerator double-compressor drive control system, the two-channel output module outputs two 0-3V sine signal waves with a fixed phase difference theta;
the driving equation of the compressor can be obtained from the following equations (1) to (3):
V＝A c ωx cos(ωt) (3)
wherein m is the piston mass,
Is the piston acceleration, c is the damping coefficient, k c Is the coefficient of elasticity, A, of the piston c Is the cross-sectional area of the piston, and x is the working stroke of the piston;
therefore, the working parameters of the compressor under different input signals can be obtained.
The active phase modulation type pulse tube refrigerator double-compressor drive control system further comprises a direct current power supply module;
the data acquisition module, the PID control module I, the PID control module II, the power amplifier I, the power amplifier II and the double-channel output module are all powered by the direct current power supply module.
In the above active phase modulation type dual-compressor driving control system for the pulse tube refrigerator, the first power amplifier and the second power amplifier have different amplification factors.
According to the active phase modulation type dual-compressor driving control system for the pulse tube refrigerator, real-time working parameters of the refrigerator are measured through the pressure sensor I, the temperature sensor and the pressure sensor, and feedback signals are formed through the PID control module I and the PID control module II respectively after the real-time working parameters are collected by the data collection module to adjust output signals of the dual-channel output module.
According to the active phase modulation type pulse tube refrigerator double-compressor drive control system, the two-channel output module receives the feedback signals of the PID control module I and the PID control module II and then adjusts the input parameters of the drive compressor and the active phase modulation compressor in real time.
The above technical solutions are only one possible technical solution of the present invention, and the protection scope of the present invention is not limited thereto, and those skilled in the art can reasonably adjust the specific design according to the actual needs.
The invention has the following advantages or beneficial effects:
(1) The driving control system for the double compressors of the active phase modulation type pulse tube refrigerator realizes the integrated feedback control of the double compressors of the active phase modulation type pulse tube refrigerator, effectively reduces the temperature oscillation of a cold head, and has more stable operation and higher reliability of the refrigerator;
(2) The active phase modulation type pulse tube refrigerator double-compressor drive control system completely adopts a direct-current power supply for driving, and can meet the application scene of the direct-current power supply for supplying power;
(3) The driving control system for the two compressors of the active phase modulation type pulse tube refrigerator simplifies the driving control link of the active phase modulation type pulse tube refrigerator, enables the whole structure to be more compact, is beneficial to the application and popularization of the active phase modulation type pulse tube refrigerator, and has great application prospect.
Drawings
The invention and its features, aspects and advantages will become more apparent from reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference symbols in the various drawings indicate like elements. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention.
Fig. 1 is a schematic diagram of a typical actively phase modulated pulse tube refrigerator;
fig. 2 is a schematic diagram of a dual-compressor drive control system of an active phase-modulation type pulse tube refrigerator according to the present invention;
wherein, 1 is power amplifier one, 2 is the drive compressor, 3 is the refrigerator cold head, 4 are the regenerator, 5 are the regenerator hot junction, 6 are the pulse tube, 7 are the pulse tube hot junction, 8 are the initiative compressor of phasing phase, 9 are power amplifier two, 10 are PID control module two, 11 are pressure sensor two, 12 are temperature sensor, 13 are data acquisition module, 14 are pressure sensor one, 15 are PID control module one, 16 are binary channels output module, 17 are direct current supply module.
Detailed Description
The structure of the present invention will be further described with reference to the drawings and the specific embodiments, but the present invention is not limited thereto.
An active phase modulation type pulse tube refrigerator dual-compressor drive control system is shown in figure 2 and comprises a power amplifier I1, a drive compressor 2, a refrigerator cold head 3, a regenerator 4, a regenerator hot end 5, a pulse tube 6, a pulse tube hot end 7, a phase modulation compressor 8, a power amplifier II 9, a PID control module II 10, a pressure sensor II 11, a temperature sensor 12, a data acquisition module 13, a pressure sensor I14, a PID control module I15, a dual-channel output module 16 and a direct current power supply module 17;
a data acquisition module 13, a PID control module I15, a PID control module II 10, a power amplifier I1, a power amplifier II 9 and a dual-channel output module 16 in the circuit system are all powered by a direct-current power supply module 17;
the dual-channel output module 16 outputs two sinusoidal signal waves of 0-3V, a fixed phase difference theta exists between the two signal waves, and the two signal waves are respectively amplified by different multiplying powers through the power amplifier I1 and the power amplifier II 6 and then respectively drive the driving compressor 1 and the driving phase modulation compressor 8.
The feedback control logic of the driving control system for the two compressors of the active phase modulation type pulse tube refrigerator is as follows:
(1) When the cold head 3 generates a small disturbance due to a change in external environment, the cold head temperature may oscillate, and the temperature sensor 12 converts the measured resistance signal into a voltage signal through a bridge circuit and inputs the voltage signal to the data acquisition module 13. After recognizing the change of the signal, the data acquisition module 13 amplifies the analog voltage signal, and converts the analog signal into two paths of digital signals through a signal conversion circuit therein. The two paths of digital signals are respectively subjected to proportional integral derivative control regulation through a PID control module I15 and a PID control module II 10, and two digital control signals are input into a double-channel output module 16. After receiving the signal, the dual-channel output module 16 converts the new digital control signal into an analog control signal through a built-in signal conversion circuit, and adjusts the two output sinusoidal signal waves to complete the feedback control of the two compressors, thereby stabilizing the cold head temperature.
(2) When the output parameter changes due to long-term operation of the driving compressor 2, the cold head temperature may oscillate, and at this time, the first pressure sensor 14 converts the measured pressure signal into a voltage signal and inputs the voltage signal to the data acquisition module 13. After recognizing the change of the signal, the data acquisition module 13 amplifies the analog voltage signal and converts the analog signal into a digital signal through a signal conversion circuit therein. The digital signal is subjected to proportional integral derivative control regulation through a PID control module I15, and a word control signal is input to a double-channel output module 16. After receiving the signal, the dual-channel output module 16 converts the new digital control signal into an analog control signal through a built-in signal conversion circuit, and adjusts the two output sinusoidal signal waves to complete the feedback control of the two compressors, thereby stabilizing the cold head temperature.
(3) When the active phase modulation compressor 8 is operated for a long time and output parameters are changed, the temperature of a cold head may oscillate, and at the moment, the second pressure sensor 11 converts a measured pressure signal into a voltage signal and inputs the voltage signal into the data acquisition module 13. After recognizing the change of the signal, the data acquisition module 13 amplifies the analog voltage signal and converts the analog signal into a digital signal through a signal conversion circuit therein. The digital signal is subjected to proportional integral derivative control regulation through the PID control module II 10, and a word control signal is input to the dual-channel output module 16. After receiving the signal, the dual-channel output module 16 converts the new digital control signal into an analog control signal through a built-in signal conversion circuit, adjusts the two output sinusoidal signal waves, and completes the feedback control of the two compressors, thereby stabilizing the cold head temperature.
The active phase modulation type pulse tube refrigerator dual-compressor drive control system realizes the integrated feedback control of the active phase modulation type pulse tube refrigerator dual-compressor, effectively reduces the cold head temperature oscillation, and has more stable refrigerator work and higher reliability; the direct-current power supply is completely adopted for driving, so that the application scene of the direct-current power supply for supplying power can be met; the driving control link of the active phase modulation type pulse tube refrigerator is simplified, so that the whole structure is more compact, the application and the popularization of the active phase modulation type pulse tube refrigerator are facilitated, and the active phase modulation type pulse tube refrigerator has great application prospect.
Those skilled in the art will appreciate that variations may be implemented by those skilled in the art in combination with the prior art and the above-described embodiments, and will not be described herein in detail. Such variations do not affect the essence of the present invention, and are not described herein.
The above description is of the preferred embodiment of the invention. It is to be understood that the invention is not limited to the particular embodiments described above, in which devices and structures not described in detail are understood to be implemented in a manner that is conventional in the art; those skilled in the art can make many possible variations and modifications to the disclosed solution, or modify the equivalent embodiments with equivalent variations, without departing from the scope of the solution, without thereby affecting the spirit of the invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.
Claims (6)
1. The utility model provides an initiative phase modulation type pulse tube refrigerator two compressor drive control system, includes drive compressor (2), refrigerator cold head (3), regenerator (4), regenerator hot junction (5), pulse tube (6), pulse tube hot junction (7), initiative phase modulation compressor (8), its characterized in that: the system also comprises a first power amplifier (1), a driving compressor (2), a second power amplifier (9), a second PID control module (10), a second pressure sensor (11), a temperature sensor (12), a data acquisition module (13), a first pressure sensor (14), a first PID control module (15) and a dual-channel output module (16);
the temperature sensor (12) is used for acquiring the temperature of the cold head (3) of the refrigerator, and the pressure sensor I (14) and the pressure sensor II (11) are respectively used for acquiring the pressure of the driving compressor (2) and the pressure of the active phase modulation compressor (8);
the double-channel output module (16) is connected with the driving compressor (2) through a power amplifier I (1), the double-channel output module (16) is connected with the active phase modulation compressor (8) through a power amplifier II (9), the double-channel output module (16) outputs two signal waves with fixed phase difference, and the two signal waves are amplified through the power amplifier I (1) and the power amplifier II (9) and respectively drive the driving compressor (2) and the active phase modulation compressor (8);
data acquisition module (13) are connected with temperature sensor (12), pressure sensor (14) and pressure sensor two (11) respectively to acquire the signal of temperature sensor (12), pressure sensor (14) and pressure sensor two (11) transmission, data acquisition module (13) are connected with binary channels output module (16) through PID control module one (15) and PID control module two (10) respectively, accomplish the feedback control to drive compressor (2) and initiative phase modulation compressor (8).
2. The dual compressor drive control system for an active phase modulation type pulse tube refrigerator according to claim 1, wherein the dual channel output module (16) outputs two sinusoidal signal waves of 0 to 3V magnitude having a fixed phase difference θ.
3. The dual compressor drive control system for an active phase modulation type pulse tube refrigerator according to claim 1, further comprising a dc power supply module (17);
the data acquisition module (13), the PID control module I (15), the PID control module II (10), the power amplifier I (1), the power amplifier II (9) and the double-channel output module (16) are all powered by a direct current power supply module (17).
4. The dual compressor drive control system for an active phase modulation type pulse tube refrigerator according to claim 1, wherein the first power amplifier (1) and the second power amplifier (9) have different amplification factors.
5. The active phase modulation type dual-compressor driving control system of the pulse tube refrigerator according to claim 1, wherein real-time working parameters of the refrigerator are measured by the pressure sensor I (14), the temperature sensor (12) and the pressure sensor (11), and feedback signals are respectively formed by the PID control module I (15) and the PID control module II (10) after the real-time working parameters are collected by the data collection module (13) to adjust output signals of the dual-channel output module (16).
6. The dual compressor drive control system for an active phase modulation type pulse tube refrigerator according to claim 5, wherein the dual channel output module (16) receives feedback signals from the PID control module i (15) and the PID control module ii (10) and then adjusts input parameters for driving the compressor (2) and the active phase modulation compressor (8) in real time.
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| CN202210519298.1A CN115183491A (en) | 2022-05-13 | 2022-05-13 | Active phase-modulation type pulse tube refrigerator double-compressor drive control system |
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| CN202210519298.1A CN115183491A (en) | 2022-05-13 | 2022-05-13 | Active phase-modulation type pulse tube refrigerator double-compressor drive control system |
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Citations (5)
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|---|---|---|---|---|
| DE10051115A1 (en) * | 2000-10-14 | 2002-04-25 | Inst Luft Kaeltetech Gem Gmbh | Pulse-tube cooler for cooling cryogenic spacecraft applications has given phase difference between compression cylinder and expansion cylinder |
| JP2006275352A (en) * | 2005-03-28 | 2006-10-12 | Aisin Seiki Co Ltd | Pulse pipe-type heat storage engine |
| CN102095269A (en) * | 2011-03-01 | 2011-06-15 | 常州鸿源动力科技有限公司 | Dual-moving piston cryo refrigerator |
| CN103105018A (en) * | 2013-01-29 | 2013-05-15 | 东南大学 | Active piston type pulse tube refrigerating machine with phase feedback regulation function |
| CN104534719A (en) * | 2014-12-09 | 2015-04-22 | 中国科学院上海技术物理研究所 | Direct-current drive and active temperature control system of two-stage high-frequency pulse tube refrigerator and design method thereof |
-
2022
- 2022-05-13 CN CN202210519298.1A patent/CN115183491A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10051115A1 (en) * | 2000-10-14 | 2002-04-25 | Inst Luft Kaeltetech Gem Gmbh | Pulse-tube cooler for cooling cryogenic spacecraft applications has given phase difference between compression cylinder and expansion cylinder |
| JP2006275352A (en) * | 2005-03-28 | 2006-10-12 | Aisin Seiki Co Ltd | Pulse pipe-type heat storage engine |
| CN102095269A (en) * | 2011-03-01 | 2011-06-15 | 常州鸿源动力科技有限公司 | Dual-moving piston cryo refrigerator |
| CN103105018A (en) * | 2013-01-29 | 2013-05-15 | 东南大学 | Active piston type pulse tube refrigerating machine with phase feedback regulation function |
| CN104534719A (en) * | 2014-12-09 | 2015-04-22 | 中国科学院上海技术物理研究所 | Direct-current drive and active temperature control system of two-stage high-frequency pulse tube refrigerator and design method thereof |
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