Cold optical refrigeration and temperature equalization system based on pump fluid loop

Abstract

The invention discloses a cold optical refrigeration and temperature equalization system based on a pump fluid loop. The cold optical refrigeration and temperature equalization system comprises a low-temperature fluid pump assembly, a liquid storage device, a condenser, a refrigerator assembly, a fluid pipeline, a cold optical assembly and a partition temperature control assembly. The low-temperature fluid pump set is connected with the liquid storage device and the condenser in series through fluid pipelines, the condenser is connected with the refrigerating machine assembly in a heat conduction mode, the fluid pipelines are connected with the cold optical assembly in a series-parallel connection mode in a heat conduction mode, and the partition temperature control assembly is installed on the outer surface of the cold optical assembly to achieve temperature regulation and control over the cold optical assembly. According to the invention, the requirements of an infrared cold optical detection system in the prior art on large cooling capacity, long distance, flexible and adjustable transmission path and adjustable temperature are met.

Description

Technical Field

[0001] The present invention relates to the technical field of infrared cold optical detection technology, and in particular to a cold optical refrigeration and temperature equalization system based on a pump fluid circuit. Background Art

[0002] With the demand for low background and high sensitivity detection in infrared detection systems, the use of cold optical technology to cool optical components and reduce the background thermal noise of the instrument has become an inevitable choice. Especially with the development of large-caliber, compact and complex infrared cold optical systems, the use of conventional low-temperature heat transfer components such as slotted heat pipes has been difficult to meet the current application requirements of cold optical systems. It is urgent to develop a new type of low-temperature heat transfer system with a flexible layout that is suitable for the temperature range of -200℃ to -40℃, has a large cold transfer capacity, and can adapt to complex spatial structures. Summary of the invention

[0003] The purpose of the present invention is to provide a cold optical refrigeration and temperature equalization system based on a pump fluid circuit, which mainly solves the needs of infrared cold optical detection systems for large cooling capacity, long distance, flexible and adjustable transmission path, and controllable temperature.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a cold optical refrigeration and temperature equalization system based on a pump fluid circuit, characterized in that: the cold optical refrigeration and temperature equalization system based on a pump fluid circuit includes a cryogenic fluid pump component, a liquid reservoir, a condenser, a refrigerator component, a fluid pipeline, a cold optical component, and a zoned temperature control component;

[0005] The cryogenic fluid pump group is connected in series with the liquid storage tank and the condenser through fluid pipelines, the condenser is thermally connected to the refrigerator assembly, the fluid pipeline is thermally connected to the cold optical assembly in series-parallel form, and the zoned temperature control assembly is installed on the outer surface of the cold optical assembly to realize temperature control of the cold optical assembly.

[0006] Furthermore, the applicable temperature range of the cryogenic fluid pump is -200°C to -40°C, and it has a 100W-level cold transmission capacity.

[0007] Furthermore, the condenser includes a condenser substrate and a serpentine layout fluid channel, the serpentine layout fluid channel is arranged on the condenser substrate, and the serpentine layout fluid channel is connected to the fluid pipeline.

[0008] Furthermore, the fluid pipeline includes a connecting pipeline and a series-parallel pipeline, the series-parallel pipeline includes a fluid pipeline and a fin, the fluid pipeline is connected to the fin, the fin is installed on the outer surface of the cold optical component, and the fluid pipeline is connected to the connecting pipeline; the serpentine layout fluid channel is connected to the connecting pipeline.

[0009] Furthermore, the connecting pipeline is a flexible pipeline, which can achieve flexible adjustment and complex spatial structure layout.

[0010] Furthermore, the optical component is externally coated with a heat-insulating multi-layer component.

[0011] Furthermore, the zoned temperature control component includes a temperature control heater and a temperature measuring sensor, both of which are installed on the outer surface of the cold optical component. The zoned temperature control component adopts zoned temperature control technology to achieve regulation of different areas or the overall working temperature of the cold optical component.

[0012] A method for installing a cold optical refrigeration and temperature equalization system based on a pump fluid circuit, which relates to the above-mentioned cold optical refrigeration and temperature equalization system based on a pump fluid circuit, and the specific installation steps are:

[0013] S1: The connecting pipeline is connected to the cryogenic fluid pump, liquid reservoir and condenser of the cryogenic fluid pump assembly by welding. After welding, the connecting pipeline system is evacuated and leak tested by helium mass spectrometer to ensure that the leakage rate is less than 1×10 -9 Pa·m 3 / s;

[0014] S2: Perform low-temperature working filling of the piping system according to the working temperature requirements. After filling, clamp and weld the filling port, and use special test paper to detect leaks on the weld.

[0015] S3: thermally connecting the fluid pipe with fins to the outer surface of the cold optical component according to the designed series-parallel scheme;

[0016] S4: Install a temperature control heater and a temperature sensor on the cold optical component;

[0017] S5: Electronically assemble and weld the temperature control heater and temperature sensor on the cold optical component according to the designed circuit, and debug them to the set working state;

[0018] S6: Connect the condenser to the cold end of the refrigerator assembly by thermal conduction, and place a 0.1 mm indium sheet between the two to reduce the contact thermal resistance;

[0019] S7: Turn on the pump group of the cryogenic fluid pump assembly to operate and debug the fluid circuit to meet the design requirements. In view of the above technical features, the present invention has the following beneficial effects:

[0020] 1. The cold optical refrigeration and temperature equalization system based on a pump fluid circuit of the present invention adopts a pump drive scheme as the power source of the fluid circuit. The flow rate and heat exchange capacity of the system can be adjusted by adjusting parameters such as the pump speed and valve opening. It has strong cold transmission capacity and flexible and adjustable fluid pipelines, and can adapt to the internal space structure layout of various complex instruments.

[0021] 2. The cold optical refrigeration and temperature equalization system based on a pump fluid circuit of the present invention adopts a pump fluid circuit to circulate the working medium in the temperature equalization pipeline (i.e., the fluid pipeline). It can overcome the influence of gravity during the ground testing phase, and its layout on the spacecraft is more flexible. It can be deployed over long distances and across platforms, and can be used in situations where it works in coordination with multiple platforms.

[0022] 3. In the cold optical refrigeration and temperature equalization system based on a pump fluid circuit of the present invention, the fluid pipelines thermally connected to the infrared optical components are installed in series-parallel mode. The fluid working medium in the series-parallel pipelines can be relatively evenly distributed to different parts of the infrared optical components, which is more conducive to improving the uniformity of the temperature field of the cold optical components.

[0023] 4. The cold optical refrigeration and temperature equalization system based on a pump fluid circuit of the present invention adopts a zoned temperature control scheme, which can accurately control the temperature of different parts of the infrared optical component through the temperature control circuit (i.e., series-parallel pipelines), thereby realizing local or overall temperature control of the cold optical component. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a cold optical refrigeration and temperature equalization system based on a pump fluid circuit in specific embodiment 1.

[0025] Figure 2 It is a diagram of the internal structure of the condenser in specific embodiment 1.

[0026] Figure 3 It is a cross-sectional view of a fluid pipeline with fins in specific embodiment 1.

[0027] In the figure: 1. Cryogenic fluid pump assembly; 2. Liquid reservoir; 3. Condenser; 3-1. Condenser substrate; 3-2. Serpentine layout fluid channel; 4. Refrigerator assembly; 5-1. Connecting pipes; 5-2. Series-parallel pipes; 5-2.1. Fluid pipelines; 5-2.2. Fins; 6. Cold optical assembly; 7-1. Temperature control heater; 7-2. Temperature sensor. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0029] See also Figures 1 to 3, Specific embodiment 1, this embodiment 1 provides a cold optical refrigeration and temperature equalization system based on a pump fluid circuit, including a cryogenic fluid pump component 1, a liquid reservoir 2, a condenser 3, a refrigerator component 4, a fluid pipeline, a cold optical component 6, and a zoned temperature control component;

[0030] The cryogenic fluid pump group 1 is connected in series with the liquid reservoir 2 and the condenser 3 through a fluid pipeline, the condenser 3 is thermally connected to the refrigerator component 4, the fluid pipeline is thermally connected to the cold optical component 6 in a series-parallel form, and the zoned temperature control component 7 is installed on the outer surface of the cold optical component 6 to realize temperature control of the cold optical component 6.

[0031] The applicable temperature range of the cryogenic fluid pump 1 is -200°C to -40°C, and it has a 100W-level cold transmission capacity. The specific operating temperature depends on the operating temperature and the type of fluid working medium, which solves the infrared cold optical detection system's demand for large cold capacity.

[0032] The condenser 3 includes a condenser substrate 3-1 and a serpentine layout fluid channel 3-2. The serpentine layout fluid channel 3-2 is arranged on the condenser substrate 3-1, and the serpentine layout fluid channel 3-2 is connected to the fluid pipeline.

[0033] The fluid pipeline includes a connecting pipeline 5-1 and a series-parallel pipeline 5-2, the series-parallel pipeline 5-2 includes a fluid pipeline 5-2.1 and a fin 5-2.2, the fluid pipeline 5-2.1 is connected to the fin 5-2.2, the fin 5-2.2 is installed on the outer surface of the cold optical component 6, the fluid pipeline 5-2.1 is connected to the connecting pipeline 5-1; the serpentine layout fluid channel 3-2 is connected to the connecting pipeline 5-1. The fin 5-2.2 is not only used to fix the series-parallel pipeline, but also can increase the heat conduction contact area, also known as a "heat expansion fin".

[0034] The connecting pipeline 5-1 is a flexible pipeline, which realizes flexible adjustment and complex spatial structure layout, and solves the needs of the infrared cold optical detection system for long distance and flexible and adjustable transmission path.

[0035] The optical component 6 is externally coated with a heat-insulating multi-layer component.

[0036] The zoned temperature control component includes a temperature control heater 7-1 and a temperature sensor 7-2. Both the temperature control heater 7-1 and the temperature sensor 7-2 are installed on the outer surface of the cold optical component 6. The zoned temperature control component adopts zoned temperature control technology to realize the regulation of different areas or the overall working temperature of the cold optical component 6, thereby solving the demand for temperature controllable of the infrared cold optical detection system.

[0037] A method for installing a cold optical refrigeration and temperature equalization system based on a pump fluid circuit, which relates to the above-mentioned cold optical refrigeration and temperature equalization system based on a pump fluid circuit, and the specific installation steps are:

[0038] S1: The connecting pipeline 5-1 is connected to the cryogenic fluid pump, the liquid reservoir 2, and the condenser 3 of the cryogenic fluid pump assembly 1 by welding. After welding, the pipeline system of the connecting pipeline 5-1 is evacuated and leak tested by a helium mass spectrometer to ensure that the leakage rate is less than 1×10 -9 Pa·m 3 / s;

[0039] S2: Perform low-temperature working filling of the piping system according to the working temperature requirements. After filling, clamp and weld the filling port, and use special test paper to detect leaks on the weld.

[0040] S3: thermally connecting the fluid conduit 5 - 2.1 with the fins 5 - 2.2 and the outer surface of the cold optical component 6 according to the designed series-parallel connection scheme;

[0041] S4: Installing a temperature control heater 7-1 and a temperature sensor 7-2 on the cold optical component 6;

[0042] S5: electronically assemble and weld the temperature control heater 7-1 and the temperature sensor 7-2 on the cold optical component 6 according to the designed circuit, and debug them to the set working state;

[0043] S6: Connect the condenser 3 to the cold end of the refrigerator assembly 4 by heat conduction, and place a 0.1 mm indium sheet between the two to reduce contact thermal resistance;

[0044] S7: Turn on the pump group of the cryogenic fluid pump assembly 1 to operate and debug the fluid circuit to meet the design requirements.

[0045] The cold optical refrigeration and temperature equalization system based on the pump fluid circuit of the present embodiment 1 realizes the refrigeration and temperature equalization of the cold optical component 6 by arranging the series-parallel combined fluid pipelines on the cold optical component 6 and making full use of the circulation flow of the low-temperature working fluid in the pump fluid circuit to fully connect the different parts of the cold optical component 6 with heat conduction, and realizes the refrigeration and temperature equalization of the cold optical component 6. The temperature control component 7 is arranged on the cold optical component 6 to realize the regulation of the working temperature. The present invention is applicable to various occasions where space or ground infrared optical systems have requirements for refrigeration and temperature field equalization, such as occasions where infrared optical detection systems have strict requirements for optical component refrigeration, temperature field uniformity and thermal deformation control, and is particularly applicable to infrared cold optical systems with large cooling capacity and long-distance heat transmission in complex instrument space, and is used to reduce the instrument background noise of the infrared detection system and improve the detection sensitivity. It can be applied to cold optical systems of spacecraft infrared detector systems and airborne aviation infrared detection cold optical systems. Specifically, it is a method that makes full use of the circulating flow of the working fluid in the cryopump fluid circuit to transfer the cooling capacity of the refrigerator assembly to different parts of the infrared optical assembly. Since the fluid pipeline and the infrared optical assembly are arranged in series and parallel and fully thermally connected, the infrared optical assembly can be cooled and the temperature field can be uniformed. The temperature of different areas of the infrared optical assembly can be controlled through the partition temperature control system, and the detection performance test of the infrared detection system under different instrument background fluxes can be realized.

[0046] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A cold optical refrigeration and temperature equalization system based on a pump fluid circuit, characterized in that: The cold optical refrigeration and temperature equalization system based on a pump fluid circuit comprises a cryogenic fluid pump component (1), a liquid storage device (2), a condenser (3), a refrigerator component (4), a fluid pipeline, a cold optical component (6), and a zoned temperature control component; The cryogenic fluid pump group (1) is connected in series with the liquid storage device (2) and the condenser (3) via a fluid pipeline, the condenser (3) is thermally connected to the refrigerator component (4), the fluid pipeline is thermally connected to the cold optical component (6) in a series-parallel form, and the zoned temperature control component (7) is installed on the outer surface of the cold optical component (6) to achieve temperature control of the cold optical component (6).

2. According to claim 1, a cold optical refrigeration and temperature equalization system based on a pump fluid circuit is characterized in that: The applicable temperature range of the cryogenic fluid pump (1) is -200°C to -40°C, and it has a 100W-level cold transmission capacity.

3. The cold optical refrigeration and temperature equalization system based on a pump fluid circuit according to claim 1, characterized in that: The condenser (3) comprises a condenser substrate (3-1) and a serpentine-structured fluid channel (3-2); the serpentine-structured fluid channel (3-2) is arranged on the condenser substrate (3-1), and the serpentine-structured fluid channel (3-2) is connected to a fluid pipeline.

4. The cold optical refrigeration and temperature equalization system based on a pump fluid circuit according to claim 3, characterized in that: The fluid pipeline comprises a connecting pipeline (5-1) and a series-parallel pipeline (5-2); the series-parallel pipeline (5-2) comprises a fluid pipeline (5-2.1) and a fin (5-2.2); the fluid pipeline (5-2.1) is connected to the fin (5-2.2); the fin (5-2.2) is mounted on the outer surface of the cold optical component (6); the fluid pipeline (5-2.1) is connected to the connecting pipeline (5-1); and the serpentine layout fluid channel (3-2) is connected to the connecting pipeline (5-1).

5. The cold optical refrigeration and temperature equalization system based on a pump fluid circuit according to claim 4, characterized in that: The connecting pipeline (5-1) is a flexible pipeline, which can realize flexible adjustment and complex spatial structure layout.

6. The cold optical refrigeration and temperature equalization system based on a pump fluid circuit according to claim 1, characterized in that: The optical component (6) is externally coated with a heat-insulating multi-layer component.

7. The cold optical refrigeration and temperature equalization system based on a pump fluid circuit according to claim 1, characterized in that: The zoned temperature control component comprises a temperature control heater (7-1) and a temperature measuring sensor (7-2); the temperature control heater (7-1) and the temperature measuring sensor (7-2) are both installed on the outer surface of the cold optical component (6); and the zoned temperature control component adopts zoned temperature control technology to achieve regulation of different areas or the overall working temperature of the cold optical component (6).

8. A method for installing a cold optical refrigeration and temperature equalization system based on a pump fluid circuit, which relates to a cold optical refrigeration and temperature equalization system based on a pump fluid circuit as claimed in any one of claims 1 to 7, wherein the specific installation steps are: S1: The connecting pipeline (5-1) is connected to the cryogenic fluid pump, the liquid storage device (2), and the condenser (3) of the cryogenic fluid pump assembly (1) by welding. After the welding is completed, the pipeline system of the connecting pipeline (5-1) is evacuated and leak detection is performed using a helium mass spectrometer to ensure that the leakage rate is less than 1×10 -9 Pa·m 3 / s; S2: Perform low-temperature working filling of the piping system according to the working temperature requirements. After filling, clamp and weld the filling port, and use special test paper to detect leaks on the weld. S3: thermally connecting the fluid pipeline (5-2.1) with the fins (5-2.2) and the outer surface of the cold optical component (6) according to the designed series-parallel scheme; S4: Installing a temperature control heater (7-1) and a temperature sensor (7-2) on the cold optical component (6); S5: electronically assemble and weld the temperature control heater (7-1) and the temperature sensor (7-2) on the cold optical component (6) according to the designed circuit, and debug them to the set working state; S6: thermally connecting the condenser (3) to the cold end of the refrigerator assembly (4), with a 0.1 mm thick indium sheet placed between the two to reduce contact thermal resistance; S7: Turn on the pump group of the cryogenic fluid pump assembly (1) to operate and debug the fluid circuit to meet the design requirements.

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