阅读说明：本技术 一种柱弹簧支撑的主动活塞调相功回收一体式脉管制冷机 (Active piston phase modulation power recovery integrated pulse tube refrigerator supported by column spring ) 是由 蒋珍华 吴亦农 黄政 吴文萃 陈钏 赵鹏 于 2021-09-14 设计创作，主要内容包括：本发明公开了一种柱弹簧支撑的主动活塞调相功回收一体式脉管制冷机,制冷机的减振器、主动调相活塞功回收机构、压缩机和冷指布置在同一轴线上,主动调相活塞轴穿过压缩活塞内孔通过调相活塞柱弹簧与制冷机壳连接。压缩机电机和主动调相活塞电机均采用动圈式直线电机,径向振动小。压缩活塞与主动调相活塞均采用气体轴承,压缩活塞采用单侧柱弹簧支撑,主动调相活塞用以回收膨胀功,提升制冷机效率。设置两处位移传感器,分别监控主动调相活塞的位移和压缩活塞的位移,通过主动调相活塞电机调整压缩活塞和主动调相活塞之间的相位,保证制冷机高效运行。本发明优点：结构紧凑,低振动,功回收,制冷效率高。(The invention discloses a column spring supported active piston phase modulation power recovery integrated pulse tube refrigerator. The compressor motor and the active phase modulation piston motor both adopt moving-coil linear motors, and the radial vibration is small. The compression piston and the active phase modulation piston both adopt gas bearings, the compression piston is supported by a single-side column spring, and the active phase modulation piston is used for recovering expansion work and improving the efficiency of the refrigerator. Two displacement sensors are arranged to monitor the displacement of the active phase modulation piston and the displacement of the compression piston respectively, and the phase between the compression piston and the active phase modulation piston is adjusted through the active phase modulation piston motor, so that the efficient operation of the refrigerator is ensured. The invention has the advantages that: compact structure, low vibration, work recovery and high refrigeration efficiency.)

1. The utility model provides an integral type pulse tube refrigerator is retrieved to initiative piston phase modulation work that post spring supported, includes shock absorber (1), initiative phase modulation piston work recovery mechanism (2), compressor (3), hot junction heat exchanger (4), cold finger (5) and refrigerator shell (6), characterized in that:

the shock absorber (1) is fixed at the rear end of a refrigerator shell (6) through threads, the front end of the shock absorber (1) is an active phase modulation piston power recovery mechanism (2), the front end of the active phase modulation piston power recovery mechanism (2) is a compressor (3), the active phase modulation piston power recovery mechanism (2) and the compressor (3) are coaxially arranged and integrated into a whole, the active phase modulation piston (2-2) penetrates through a middle hole of a compression piston (3-3), the active phase modulation piston column spring (2-2-1) is connected with the refrigerator shell (6), and a gap seal is adopted between the compression piston (3-3) and the active phase modulation piston (2-2). The compressor (3) and the cold finger (5) share a hot end heat exchanger (4), the hot end heat exchanger (4) is arranged between the compressor (3) and the cold finger (5), and the active phase modulation piston (2-2) is arranged in the cold finger (5) and is in clearance seal with the pulse tube (5-1).

2. The active phase modulation piston power recovery integrated pulse tube refrigerator supported by the column spring as claimed in claim 1, wherein the damper (1) comprises a damper plate spring (1-1), a balancing weight (1-2) and a positioning sleeve (1-3), wherein the balancing weight (1-2) is arranged between the two damper plate springs (1-1) and is fixed on the refrigerator shell (6) by the positioning sleeve (1-3). The shock absorber (1), the phase modulation power recovery mechanism (2), the compressor (3) and the cold finger (5) are arranged on the same axis.

3. The column spring supported active piston phase modulation power recovery integrated pulse tube refrigerator of claim 1, the active phase modulation piston work recovery mechanism (2) comprises an active phase modulation piston motor (2-1), an active phase modulation piston (2-2) and an active phase modulation piston displacement sensor (2-3), the active phase modulation piston shaft (2-2-2) penetrates through the compression piston (3-3), the end part of the active phase modulation piston shaft is fixed with the refrigeration shell (6) through an active phase modulation piston column spring (2-2-1), the side surface of the active phase modulation piston shaft is fixed with the coil framework (2-1-1) of the active phase modulation piston motor, the active phase modulation piston shaft (2-2-2) is in clearance seal with the compression piston (3-3), and the active phase modulation piston (2-2) is in clearance seal with the pulse tube (5-1).

4. The active phase modulation piston power recovery integrated pulse tube refrigerator supported by the column spring as claimed in claim 1, wherein the compressor (3) comprises a compressor column spring (3-1), a compression piston displacement sensor (3-2), a compression piston (3-3), a compressor motor (3-4) and a compressor cylinder (3-5). One end of a compressor column spring (3-1) is fixed on a compression piston (3-3), the other end of the compressor column spring is fixed on a refrigeration shell (6), the compression piston (3-3) is installed in a compressor cylinder (3-5), a gap between the compression piston and the compressor cylinder is sealed, the compression piston (3-3) is fixed on the inner side of a compressor motor coil framework (3-4-1), the compressor cylinder (3-5) is fixed on the inner side of a compressor motor magnetic pole (3-4-4), and a compression piston displacement sensor (3-2) is fixed on the compressor motor coil framework (3-4-1).

5. The column spring supported active phasing piston power recovery integrated pulse tube refrigerator according to claim 1, wherein the cold finger (5) comprises a pulse tube (5-1), a regenerator (5-2), a cold finger shell (5-3) and a cold end heat exchanger (5-4). The heat regenerator (5-2) is arranged on the outer side of the pulse tube (5-1), the cold finger shell (5-3) is arranged on the outer side of the heat regenerator (5-2), the cold end heat exchanger (5-4) is arranged at the end part of the cold finger (5), the active phase modulation piston (2-2) is arranged on the inner side of the pulse tube, the cold finger shell and the active phase modulation piston are sealed by adopting a gap, and the heat regenerator (5-2) is communicated with the hot end heat exchanger (4).

6. The active phase modulation piston power recovery integrated pulse tube refrigerator supported by the column spring as claimed in claim 3, wherein the active phase modulation piston motor (2-1) comprises an active phase modulation piston motor coil skeleton (2-1-1), an active phase modulation piston motor coil (2-1-2), an active phase modulation piston motor magnetic steel (2-1-3) and an active phase modulation piston motor magnetic pole (2-1-4), the active phase modulation piston motor coil (2-1-2) is fixed on the active phase modulation piston motor coil skeleton (2-1-1), the active phase modulation piston motor magnetic steel (2-1-3) is arranged outside the active phase modulation piston motor coil (2-1-2), and the active phase modulation piston motor magnetic steel (2-1-3) is fixed on the active phase modulation piston motor magnetic pole (2-1-4) On the outer side.

7. The active piston phasing power recovery integrated pulse tube refrigerator supported by the column spring as claimed in claim 3, wherein the active phasing piston (2-2) comprises an active phasing piston column spring (2-2-1), an active phasing piston shaft (2-2-2), an active phasing piston main body (2-2-3), an active phasing piston throttling groove (2-2-4), an active phasing piston one-way valve (2-2-5) and an active phasing piston high-pressure air chamber (2-2-6). The active phase modulation piston one-way valve (2-2-5) is arranged in the active phase modulation piston main body (2-2-3), the interior of the active phase modulation piston one-way valve is an active phase modulation piston high-pressure air chamber (2-2-6), active phase modulation piston throttling grooves (2-2-4) are uniformly arranged on the active phase modulation piston main body (2-2-3), and the active phase modulation piston throttling grooves (2-2-4) are communicated with the active phase modulation piston high-pressure air chamber (2-2-6).

8. The column spring supported active piston phase modulation power recovery integrated pulse tube refrigerator according to claim 3, wherein the compression piston (3-3) comprises a compression piston main body (3-3-1), a compression piston high-pressure air chamber (3-3-2), a compression piston throttling groove (3-3-3) and a compression piston one-way valve (3-3-4). The compression piston one-way valve (3-3-4) is arranged on the compression piston main body (3-3-1), a compression piston high-pressure air cavity (3-3-2) is arranged inside the compression piston one-way valve, compression piston throttling grooves (3-3-3) are uniformly arranged on the compression piston main body, and the compression piston throttling grooves (3-3-3) are communicated with the compression piston high-pressure air cavity (3-3-2).

9. The column spring supported active piston phase modulation power recovery integrated pulse tube refrigerator of claim 3, the compressor motor (3-4) comprises a compressor motor coil framework (3-4-1), a compressor motor coil (3-4-2), compressor motor magnetic steel (3-4-3) and a compressor motor magnetic pole (3-4-4), the compressor motor coil (3-4-2) is fixed on the compressor motor coil framework (3-4-1), compressor motor magnetic steel (3-4-3) is arranged on the outer side of the compressor motor coil (3-4-2), and the compressor motor magnetic steel (3-4-3) is fixed on the outer side of the compressor motor magnetic pole (3-4-4).

Technical Field

The invention relates to a pulse tube refrigerator, in particular to an active piston phase modulation power recovery integrated pulse tube refrigerator supported by a column spring.

Background

The infrared detection system has the advantages of high resolution, good concealment, excellent anti-interference performance and the like, and is widely applied to the fields of aerospace infrared remote sensing, medical treatment, military affairs, communication, toxic gas monitoring and the like, and the infrared detector can greatly increase the response speed, improve the sensitivity, expand the detection range and reduce the influence of background noise after being cooled at low temperature, so that the Stirling refrigerator with compact structure, quick start and wide temperature control range is widely applied to cooling the focal plane of the infrared detector. The compressor and the expander of the split Stirling refrigerator have lateral air inlet and outlet, radial force is generated, axial vibration is large, the compressor and the expander both need a hot-end heat exchanger for heat dissipation, and the overall weight and the occupied space of the refrigerator are increased. The expansion work of the pulse tube refrigerator cannot be recycled and dissipated as heat, resulting in reduced efficiency. The invention integrates the characteristics of compact structure and high efficiency of an integrated Stirling refrigerator and the characteristic of no moving part of a pulse tube cold finger cold head, adopts a moving coil type linear motor, effectively reduces radial vibration, uses a shock absorber in the axial direction, reduces axial vibration, uses an air bearing and uses a single-side spring support.

Disclosure of Invention

In view of the above problems and needs, it is an object of the present invention to provide a column spring supported active piston phase modulation power recovery integrated pulse tube refrigerator.

In order to achieve the above purpose, the invention adopts the following structure:

the active piston phase modulation power recovery integrated pulse tube refrigerator supported by the column spring comprises a shock absorber 1, an active phase modulation piston power recovery mechanism 2, a compressor 3, a hot end heat exchanger 4 and a cold finger 5, and is characterized in that the active phase modulation piston power recovery mechanism 2 and the compressor 3 are coaxially arranged and integrated into a whole, an active phase modulation piston shaft 2-2-2 of the active phase modulation piston power recovery mechanism 2 penetrates through a middle hole of the compression piston 3-3 and is connected with a refrigeration shell 6 through an active phase modulation piston column spring 2-2-1, a gap seal is adopted between the active phase modulation piston shaft 2-2-2 and the middle hole of the active phase modulation piston 3-3, the active phase modulation piston body 2-2-3 is arranged in the pulse tube 5-1, the two are in gap seals, the compressor 3 and the cold finger 5 share the hot end heat exchanger 4, the hot side heat exchanger 4 is arranged between the compressor 3 and the cold finger 5. The shock absorber 1, the phase modulation work recovery mechanism 2, the compressor 3, the hot-end heat exchanger 4 and the cold finger 5 are arranged on the same axis.

The active phase modulation piston power recovery mechanism 2 comprises an active phase modulation piston motor 2-1, an active phase modulation piston 2-2 and an active phase modulation piston displacement sensor 2-3, wherein the active phase modulation piston shaft 2-2-2 penetrates through a middle hole of a compression piston 3-3 and is fixed with a refrigeration shell 6 through an active phase modulation piston column spring 2-2-1, the active phase modulation piston shaft and the refrigeration shell are in clearance seal, the side surface of the active phase modulation piston shaft 2-2-2 is fixed with a coil frame 2-1-1 of the active phase modulation piston motor, and an active phase modulation piston main body 2-2-3 is installed in a pulse tube 5-1 and is in clearance seal.

The compressor 3 comprises a compressor column spring 3-1, a compression piston displacement sensor 3-2, a compression piston 3-3, a compressor motor 3-4 and a compressor cylinder 3-5. Two ends of a compressor column spring 3-1 are respectively fixed on a compression piston 3-3 and a refrigeration shell 6, the compression piston 3-3 is arranged in a compressor cylinder 3-5, the compression piston 3-3 and the compressor motor coil framework 3-4-1 are sealed by adopting a gap, the compressor cylinder 3-5 is fixed on the inner side of a compressor motor magnetic pole 3-4-4, and a compression piston displacement sensor 3-2 is fixed on the compressor motor coil framework 3-4-1.

The cold finger 5 comprises a pulse tube 5-1, a heat regenerator 5-2, a cold finger shell 5-3 and a cold end heat exchanger 5-4. The pulse tube 5-1 is fixed in the regenerator 5-2, the regenerator 5-2 is filled in the cold finger shell 5-3, the end of the cold finger 5 is a cold end heat exchanger 5-4, the inner side of the pulse tube is an active phase modulation piston 2-2, the cold end heat exchanger 5-4 and the active phase modulation piston are sealed by adopting a gap, and the regenerator 5-2 is communicated with the hot end heat exchanger 4.

The active phase modulation piston motor 2-1 comprises an active phase modulation piston motor coil framework 2-1-1, an active phase modulation piston motor coil 2-1-2, active phase modulation piston motor magnetic steel 2-1-3 and an active phase modulation piston motor magnetic pole 2-1-4, wherein the active phase modulation piston motor coil 2-1-2 is fixed on the active phase modulation piston motor coil framework 2-1-1, the active phase modulation piston motor magnetic steel 2-1-3 is arranged on the outer side of the active phase modulation piston motor coil 2-1-2, and the active phase modulation piston motor magnetic steel 2-1-3 is fixed on the outer side of the active phase modulation piston motor magnetic pole 2-1-4.

The active phase modulation piston 2-2 comprises an active phase modulation piston column spring 2-2-1, an active phase modulation piston shaft 2-2-2, an active phase modulation piston main body 2-2-3, an active phase modulation piston throttling groove 2-2-4, an active phase modulation piston one-way valve 2-2-5 and an active phase modulation piston high-pressure air chamber 2-2-6. The active phase modulation piston one-way valve 2-2-5 is arranged in the active phase modulation piston main body 2-2-3, the interior of the active phase modulation piston one-way valve is an active phase modulation piston high-pressure air chamber 2-2-6, active phase modulation piston throttling grooves 2-2-4 are uniformly arranged on the active phase modulation piston main body 2-2-3, and the active phase modulation piston throttling grooves 2-2-4 are communicated with the active phase modulation piston high-pressure air chamber 2-2-6.

The compression piston 3-3 comprises a compression piston main body 3-3-1, a compression piston high-pressure air chamber 3-3-2, a compression piston throttling groove 3-3-3 and a compression piston one-way valve 3-3-4. The compression piston one-way valve 3-3-4 is arranged on the compression piston main body 3-3-1, the compression piston high-pressure air chamber 3-3-2 is arranged inside the compression piston one-way valve, the compression piston throttling grooves 3-3-3 are uniformly arranged on the compression piston main body, and the compression piston throttling grooves 3-3-3 are communicated with the compression piston high-pressure air chamber 3-3-2.

The compressor motor 3-4 comprises a compressor motor coil framework 3-4-1, a compressor motor coil 3-4-2, compressor motor magnetic steel 3-4-3 and a compressor motor magnetic pole 3-4-4, the compressor motor coil 3-4-2 is fixed on the compressor motor coil framework 3-4-1, the compressor motor magnetic steel 3-4-3 is arranged on the outer side of the compressor motor coil 3-4-2, and the compressor motor magnetic steel 3-4-3 is fixed on the outer side of the compressor motor magnetic pole 3-4-4.

Compared with the prior art, the invention has the advantages that:

1. the compression piston and the active phase modulation piston are radially supported by the gas bearing and are fixed on the refrigeration shell by the single-side column spring to provide restoring force, and the axial size is shortened compared with a double-side spring support structure, so that the structure of the refrigerator is more compact.

2. The compressor and the active phase modulation piston both adopt moving-coil linear motors, the radial force is more uniform, the radial vibration is small, and the compressor, the active phase modulation piston power recovery mechanism, the shock absorber and the cold finger are coaxially arranged, so that the radial vibration force is reduced. A shock absorber is axially arranged on the back of the active phase modulation piston power recovery mechanism, so that the axial vibration of the refrigerating machine in the working process is reduced.

3. The compression piston is supported by the column spring, so that the axial stiffness is effectively improved under low stress, and the high-frequency and high-efficiency operation of the linear compressor is realized.

4. The motion conditions of the compression piston and the active phase modulation piston are monitored by a displacement sensor, the relative motion phase of the active phase modulation piston and the compression piston can be adjusted by a motor of the phase modulation power recovery mechanism, the expansion power is recovered while the phase of the active phase modulation piston is effectively adjusted, and the high-efficiency operation of the refrigerator is kept.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the damper of the present invention;

FIG. 3 is a schematic diagram of the active phasing piston work recovery mechanism of the present invention;

FIG. 4 is a schematic view of a compressor according to the present invention;

FIG. 5 is a schematic view of a cold finger structure according to the present invention;

FIG. 6 is a schematic diagram of an active phasing piston motor according to the present invention;

FIG. 7 is a schematic diagram of an active phasing piston according to the present invention;

fig. 8 is a schematic view of a compression piston according to the present invention.

Fig. 9 is a schematic view of the compressor motor structure in the present invention.

The numbers in the figures are as follows: 1 is a shock absorber, 1-1 is a shock absorber plate spring, 1-2 is a balancing weight, 1-3 is a locating sleeve, 2 is an active phase modulation piston power recovery mechanism, 2-1 is an active phase modulation piston motor, 2-2 is an active phase modulation piston, 2-3 is an active phase modulation piston displacement sensor, 3 is a compressor, 3-1 is a compressor column spring, 3-2 is a compression piston displacement sensor, 3-3 is a compression piston, 3-4 is a compressor motor, 3-5 is a compressor cylinder, 4 is a hot end heat exchanger, 5 is a cold finger, 5-1 is a pulse tube, 5-2 is a heat regenerator, 5-3 is a cold finger shell, 5-4 is a cold end heat exchanger, 2-1-1 is an active phase modulation piston motor coil skeleton, 2-1-2 is an active phase modulation piston motor coil, 2-1-3 is active phase modulation piston motor magnetic steel, 2-1-4 is active phase modulation piston motor magnetic pole, 2-2-1 is active phase modulation piston column spring, 2-2-2 is active phase modulation piston shaft, 2-2-3 is active phase modulation piston main body, 2-2-4 is active phase modulation piston throttling groove, 2-2-5 is active phase modulation piston one-way valve, 2-2-6 is active phase modulation piston high-pressure air chamber, 3-3-1 is compression piston main body, 3-3-2 is compression piston high-pressure air chamber, 3-3-3 is compression piston throttling groove, 3-3-4 is compression piston one-way valve, 3-4-1 is compressor motor coil skeleton, 3-4-2 is compressor motor coil, 3-4-3 is compressor motor magnetic steel, and 3-4-4 is compressor motor magnetic pole.

Detailed Description

The invention is described in detail below with reference to the figures and the specific embodiments.

Example 1

As shown in fig. 1, the present embodiment provides a 15W @80K supported active phase modulation piston power recovery integrated pulse tube refrigerator, which includes a shock absorber 1, a phase modulation power recovery mechanism 2, a compressor 3, a hot-end heat exchanger 4, and a cold finger 5, and is characterized in that: the compressor can provide 300Wac input power, the phase modulation power recovery mechanism 2 and the compressor 3 are coaxially arranged and integrated into a whole, the diameter of a compression piston 3-3 is 32, the diameter of an active phase modulation piston body 2-2-3 is 26, the diameter of an active phase modulation piston shaft 2-2-2 is 8mm, the active phase modulation piston shaft penetrates through an inner hole of the compression piston 3-3, the compression piston 3-3 and the active phase modulation piston shaft 2-2-2 are in clearance sealing, and the unilateral clearance is 0.015 mm. The active phase modulation piston shaft 2-2-2 is connected with a refrigeration shell 6 through an active phase modulation piston column spring 2-2-1, the active phase modulation piston body 2-2-3 is installed in a pulse tube 5-1, the two adopt clearance sealing, the unilateral clearance is 0.015mm, the compressor 3 and the cold finger 5 share a hot end heat exchanger 4, and the hot end heat exchanger 4 is arranged between the compressor 3 and the cold finger 5. The shock absorber 1, the phase modulation work recovery mechanism 2, the compressor 3, the hot-end heat exchanger 4 and the cold finger 5 are arranged on the same axis.

The active phase modulation piston power recovery mechanism 2 comprises an active phase modulation piston motor 2-1, an active phase modulation piston 2-2 and an active phase modulation piston displacement sensor 2-3, wherein the side surface of the active phase modulation piston shaft 2-2-2 is fixed with a coil framework 2-1-1 of the active phase modulation piston motor. The active phase modulation piston displacement sensor 2-3 is fixed with a coil framework 2-1-1 of the power recovery motor and used for monitoring and adjusting the motion phase difference between the active phase modulation piston and the compression piston, so that the high-efficiency operation of the refrigerator is ensured.

The compressor 3 comprises a compressor column spring 3-1, a compression piston displacement sensor 3-2, a compression piston 3-3, a compressor motor 3-4 and a compressor cylinder 3-5. Two ends of a compressor column spring 3-1 are respectively fixed on a compression piston 3-3 and a refrigeration shell 6, the compression piston 3-3 is installed in a compressor cylinder 3-5, the two are sealed by adopting a gap, the single-side gap is 0.018mm, the compression piston 3-3 is fixed with the inner side of a compressor motor coil framework 3-4-1, the compressor cylinder 3-5 is fixed on the inner side of a compressor motor magnetic pole 3-4-4, and a compression piston displacement sensor 3-2 is fixed on the compressor motor coil framework 3-4-1 and used for monitoring the displacement of the compression piston in real time.

The cold finger 5 comprises a pulse tube 5-1, a heat regenerator 5-2, a cold finger shell 5-3 and a cold end heat exchanger 5-4. The pulse tube 5-1 is fixed in the regenerator 5-2, the regenerator 5-2 is a ring-shaped silk screen and is filled in the cold finger shell 5-3, the end part of the cold finger 5 is a cold end heat exchanger 5-4, the inner side of the pulse tube is an active phase modulation piston 2-2, the cold finger shell and the cold finger shell adopt clearance sealing, and the regenerator 5-2 is communicated with a hot end heat exchanger 4.

The active phase modulation piston motor 2-1 is a moving coil type linear motor and comprises an active phase modulation piston motor coil framework 2-1-1, an active phase modulation piston motor coil 2-1-2, active phase modulation piston motor magnetic steel 2-1-3 and an active phase modulation piston motor magnetic pole 2-1-4, wherein the active phase modulation piston motor coil 2-1-2 is fixed on the active phase modulation piston motor coil framework 2-1-1 and is positioned between the active phase modulation piston motor magnetic steel 2-1-4 and the active phase modulation piston motor magnetic pole 2-1-4, the active phase modulation piston motor magnetic pole 2-1-4 can enable a magnetic field generated by the active phase modulation piston motor magnetic steel 2-1-4 to form a closed loop, when the active phase modulation piston motor coil 2-1-2 is electrified with alternating current, the active phase modulation piston motor coil 2-1-2 does the motion of cutting magnetic lines, the active phase modulation piston 2-2 is driven by the active phase modulation piston motor coil framework 2-1-1 to move, and the phase of alternating voltage input into the active phase modulation piston motor coil 2-1-2 and the compressor motor coil 3-4-2 is adjusted through a compression piston displacement sensor 3-2 and a feedback signal of the active phase modulation piston displacement sensor 2-3, so that the phase difference of the active phase modulation piston 2-2 relative to the compression piston 3-3 is kept stable, and the refrigerator operates efficiently.

The active phase modulation piston 2-2 comprises an active phase modulation piston column spring 2-2-1, an active phase modulation piston shaft 2-2-2, an active phase modulation piston main body 2-2-3, an active phase modulation piston throttling groove 2-2-4, an active phase modulation piston one-way valve 2-2-5 and an active phase modulation piston high-pressure air chamber 2-2-6. The active phase modulation piston one-way valve 2-2-5 is arranged in the active phase modulation piston main body 2-2-3, the interior of the active phase modulation piston one-way valve is an active phase modulation piston high-pressure air chamber 2-2-6, active phase modulation piston throttling grooves 2-2-4 are uniformly arranged on the active phase modulation piston main body 2-2-3, and the active phase modulation piston throttling grooves 2-2-4 are communicated with the active phase modulation piston high-pressure air chamber 2-2-6.

The active phase modulation piston 2-2 comprises an active phase modulation piston column spring 2-2-1, an active phase modulation piston shaft 2-2-2, an active phase modulation piston main body 2-2-3, an active phase modulation piston throttling groove 2-2-4, an active phase modulation piston one-way valve 2-2-5 and an active phase modulation piston high-pressure air chamber 2-2-6. The active phase modulation piston one-way valve 2-2-5 is arranged in the active phase modulation piston main body 2-2-3 and is communicated with the active phase modulation piston high-pressure air chamber 2-2-6, the thickness of a valve plate is 0.1mm, active phase modulation piston throttling grooves 2-2-4 are uniformly arranged on the active phase modulation piston main body 2-2-3, the groove depth is 0.02mm, the groove width is 0.2mm, and the active phase modulation piston throttling grooves 2-2-4 are communicated with the active phase modulation piston high-pressure air chamber 2-2-6.

The compression piston 3-3 comprises a compression piston main body 3-3-1, a compression piston high-pressure air chamber 3-3-2, a compression piston throttling groove 3-3-3 and a compression piston one-way valve 3-3-4. The compression piston one-way valve 3-3-4 is arranged on the compression piston main body 3-3-1, the thickness of the valve plate is 0.1mm, the compression piston high-pressure air cavity 3-3-2 is arranged inside the compression piston one-way valve 3-3-4, the compression piston throttling grooves 3-3-3 are uniformly arranged on the compression piston main body 3-3-1, the groove depth is 0.02mm, the groove width is 0.2mm, and the compression piston throttling grooves 3-3-3 are communicated with the compression piston high-pressure air cavity 3-3-2 inside.

The compressor motor 3-4 is a moving-coil linear motor and comprises a compressor motor coil framework 3-4-1, a compressor motor coil 3-4-2, compressor motor magnetic steel 3-4-3 and a compressor motor magnetic pole 3-4-4, the compressor motor coil 3-4-2 is fixed on the compressor motor coil framework 3-4-1 and is positioned between the compressor motor magnetic steel 3-4-3 and the compressor motor magnetic pole 3-4-4, the compressor motor magnetic pole 3-4-4 can enable a magnetic field generated by the compressor motor magnetic steel 3-4-3 to form a closed loop, when the compressor motor coil 3-4-2 is electrified with alternating current, the compressor motor coil 3-4-2 is enabled to do reciprocating motion for cutting magnetic lines of force, the motor coil framework 3-4-1 of the compressor drives the compression piston 3-3 to reciprocate together.

Finally, it should be noted that: it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the embodiments and descriptions are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which are intended to fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.