CN209445627U - Single compressor drives two vascular cold finger systems, two cold finger cooling capacity distributor - Google Patents
Single compressor drives two vascular cold finger systems, two cold finger cooling capacity distributor Download PDFInfo
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- CN209445627U CN209445627U CN201920036704.2U CN201920036704U CN209445627U CN 209445627 U CN209445627 U CN 209445627U CN 201920036704 U CN201920036704 U CN 201920036704U CN 209445627 U CN209445627 U CN 209445627U
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Abstract
This patent discloses a kind of single compressors to drive two vascular cold finger systems, two cold finger cooling capacity distributor, and this patent includes a two vascular cold finger system of driven compressor, wherein there is a compressor, two vascular cold fingers, and compressor outlet connecting leg, inertia tube and air reservoir.This patent, which provides, adjusts cold finger air inlet connecting leg length and internal diameter and inertia length of tube and internal diameter to adjust cold finger impedance to adjust the method that single compressor drives the distribution of two vascular cold finger refrigeration system cooling capacity.The advantages of this patent is to meet the demand of different detector chips cooling capacity at a temperature of different operating, meets multifunction test cabin station module external applied load refrigeration machine application item demand.
Description
Technical field:
This patent is under the jurisdiction of regenerating type low-temperature refrigerator field, and in particular to one kind is suitable for adjusting single compressor driving
The device of two vascular cold finger performances.
Background technique:
Vascular refrigerator is due to obviating the moving component of low-temperature end, simple, high reliablity, with small vibration, longevity with structure
Order the advantages that long, electromagnetism interference, reduce vibration and in terms of have particularly apparent advantage.In order to improve detector
Detection accuracy and image quality, must just increase the pixel density of detection chip simultaneously to the other component such as optics of detector
Eyeglass is cooled down.Due to the diversity of existing satellite load, it is cold at a temperature of different operating that different detector chips need to be met
The demand of amount meets multifunction test cabin station module external applied load refrigeration machine application item demand.An and driven compressor two
Vascular cold finger refrigeration system can adjust the cooling capacity of two cold fingers using the intake manifold length and inertia length of tube that adjust vascular cold finger
Distribution, to meet the needs of cooling capacity at a temperature of different operating.
Summary of the invention:
It is simple that the purpose of this patent is to provide a kind of structure, operates convenient single compressor and drives two vascular cold finger refrigeration systems
Cooling capacity distributor meets the refrigeration requirement of different operating warm area.
Refrigeration system involved in this patent includes compressor 1, the first displacement sensor 2-1, second displacement sensor 2-
2, main connecting leg 3, first pressure sensor 4-1, second pressure sensor 4-2, first time connecting leg 5-1, second of connecting leg 5-2, the
One inertia tube 6-1, the second inertia tube 6-2, the first air reservoir 7-1, the second air reservoir 7-2, the first vascular cold finger 8-1, the second vascular are cold
Refer to 8-2.
The adjusting method that one of this patent single compressor drives two vascular cold finger refrigeration system cooling capacity to distribute, including with
Lower step:
(1) two vascular cold finger refrigeration systems are driven to single compressor, changes the internal diameter or length of one of cold finger inertia tube
Degree, changes the overall impedance of the cold finger, to change the cooling capacity distribution of refrigeration system.
(2) two vascular cold finger refrigeration systems are driven to single compressor, changes the length of one of cold finger inlet connecting leg
Or internal diameter, change the overall impedance of the cold finger, to change the cooling capacity distribution of refrigeration system.
The refrigeration mechanism cooling capacity Q in vascular refrigerator is known by theorycWith entrance vascular sound functionIt is directly proportional, it may be assumed that
Wherein: P,Respectively indicate transient surge pressure, volume flow rate；θ indicates the phase between surge pressure and flow rate
Angle.Define acoustic impedance:
Formula (2), which are substituted into formula (1), to be obtained:
Therefore in the case where P is certain, it can enter voice function to cold finger by changing impedance ZIt is adjusted, from
And reaches and adjust refrigerating capacity amount QcPurpose.
According to sound-electric analogy, total acoustic impedance Z be may be expressed as: in fluid
Z=R+j (XL-XC)(4)
Wherein R is acoustic resistance, XLFor induction reactance, XCFor capacitive reactance.
For the tubular structures such as cold finger air inlet connecting leg, inertia tube, R, XL、XCExpression formula is as follows:
Tubular structure acoustic resistance:
Tubular structure induction reactance:
Tubular structure capacitive reactance:
Wherein μ is viscosity, and D is caliber, and L is pipe range, and ω is the angular frequency of acoustic vibration, and ρ is gas density, and γ is
Exponent of adiabatic compression, R are gas constant.
Formula (5), (6), (7) are updated in formula (4), tubular assembly (cold finger entrance connecting leg, inertia tube) acoustic impedance can be obtained:
From the above equation, we can see that the influence factor of cold finger entrance impedance has μ viscosity, D caliber, L pipe range, ω is sound wave vibration
Dynamic angular frequency, ρ are gas density, and γ is exponent of adiabatic compression.It, can be approximate but when determining under operating condition or running environment
Think viscosity μ (influenced by operating temperature, but varied less in fixed warm area), angular frequency (the fixed frequency of acoustic vibration
Rate), gas density ρ, exponent of adiabatic compression γ is remained unchanged.It is caliber D, pipe range that the parameter adjusted is easier in actual design
L。
The advantages of this patent:
The advantages of this patent, is to meet the demand of different detector chips cooling capacity at a temperature of different operating, meet
Multifunction test cabin station module external applied load refrigeration machine application item demand.
Detailed description of the invention:
Fig. 1 is that this patent shows for adjusting the principle of single compressor two vascular cold finger refrigeration system cooling capacity distributors of driving
It is intended to；
Specific embodiment:
This patent is further described with reference to the accompanying drawings and embodiments
As shown in Figure 1, a two vascular cold finger refrigeration system of driven compressor includes compressor 1 in this patent, first
Displacement sensor 2-1, second displacement sensor 2-2, main connecting leg 3, first pressure sensor 4-1, second pressure sensor 4-2, the
Connecting leg 5-1), second connecting leg 5-2, the first inertia tube 6-1, the second inertia tube 6-2, the first air reservoir 7-1, the second air reservoir 7-
2, the first vascular cold finger 8-1, the second vascular cold finger 8-2.
One of this patent single compressor drives the adjusting method of two vascular cold finger refrigeration system cooling capacity distribution, by following
Step carries out:
(1) two vascular cold finger refrigeration systems are driven to single compressor, changes the internal diameter or length of one of cold finger inertia tube
Degree, changes the overall impedance of the cold finger, to change the cooling capacity distribution of refrigeration system.
(2) two vascular cold finger refrigeration systems are driven to single compressor, changes the length of one of cold finger inlet connecting leg
Or internal diameter, change the overall impedance of the cold finger, to change the cooling capacity distribution of refrigeration system.
The refrigeration mechanism cooling capacity Q in vascular refrigerator is known by theorycWith entrance vascular sound functionIt is directly proportional, it may be assumed that
Wherein: P,Respectively indicate transient surge pressure, volume flow rate；θ indicates the phase between surge pressure and flow rate
Angle.Define acoustic impedance:
Formula (2), which are substituted into formula (1), to be obtained:
Therefore in the case where P is certain, it can enter voice function to cold finger by changing impedance ZIt is adjusted, from
And reaches and adjust refrigerating capacity amount QcPurpose.
According to sound-electric analogy, total acoustic impedance Z be may be expressed as: in fluid
Z=R+j (XL-XC) (4)
Wherein R is acoustic resistance, XLFor induction reactance, XCFor capacitive reactance.
For the tubular structures such as cold finger air inlet connecting leg, inertia tube, R, XL、XCExpression formula is as follows:
Tubular structure acoustic resistance:
Tubular structure induction reactance:
Tubular structure capacitive reactance:
Wherein μ is viscosity, and D is caliber, and L is pipe range, and ω is the angular frequency of acoustic vibration, and ρ is gas density, and γ is
Exponent of adiabatic compression, R are gas constant.
Formula (5), (6), (7) are updated in formula (4), tubular assembly (cold finger entrance connecting leg, inertia tube) acoustic impedance can be obtained:
From the above equation, we can see that the influence factor of cold finger entrance impedance has μ viscosity, D caliber, L pipe range, ω is sound wave vibration
Dynamic angular frequency, ρ are gas density, and γ is exponent of adiabatic compression.It, can be approximate but when determining under operating condition or running environment
Think viscosity μ (influenced by operating temperature, but varied less in fixed warm area), angular frequency (the fixed frequency of acoustic vibration
Rate), gas density ρ, exponent of adiabatic compression γ is remained unchanged.It is caliber D, pipe range that the parameter adjusted is easier in actual design
L。
Finally, it should be noted that It should be understood by those skilled in the art that this patent is not restricted to the described embodiments, on
The principle for only illustrating this patent described in embodiment and specification is stated, in the premise for not departing from this patent spirit and scope
Under, this patent will also have various changes and improvements, these changes and improvements are both fallen within the scope of claimed this patent.This is specially
The claimed range of benefit is defined by the appending claims and its equivalent thereof.
Claims (1)
1. a kind of single compressor drives two vascular cold finger systems, two cold finger cooling capacity distributor, comprising: compressor (1), first
Displacement sensor (2-1), second displacement sensor (2-2), main connecting leg (3), first pressure sensor (4-1), second pressure sensing
Device (4-2), first time connecting leg (5-1), second of connecting leg (5-2), the first inertia tube (6-1), the second inertia tube (6-2), first
Air reservoir (7-1), the second air reservoir (7-2), the first vascular cold finger (8-1), the second vascular cold finger (8-2), it is characterised in that:
Wherein compressor (1) is connected by main connecting leg (3) and two connecting legs (5-1,5-2) and vascular cold finger (8-1,8-2), position
Displacement sensor (2-1,2-2) is used to measure piston displacement, and pressure sensor (4-1,4-2) is used to measure pressure wave.
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| CN201920036704.2U CN209445627U (en) | 2019-01-10 | 2019-01-10 | Single compressor drives two vascular cold finger systems, two cold finger cooling capacity distributor |
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| CN201920036704.2U CN209445627U (en) | 2019-01-10 | 2019-01-10 | Single compressor drives two vascular cold finger systems, two cold finger cooling capacity distributor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109579342A (en) * | 2019-01-10 | 2019-04-05 | 中国科学院上海技术物理研究所 | Single compressor drives two vascular cold finger systems, two cold finger cooling capacity distributor and method |
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2019
- 2019-01-10 CN CN201920036704.2U patent/CN209445627U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109579342A (en) * | 2019-01-10 | 2019-04-05 | 中国科学院上海技术物理研究所 | Single compressor drives two vascular cold finger systems, two cold finger cooling capacity distributor and method |
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