A mechanical refrigeration-assisted cooling system

Abstract

This invention discloses a mechanical refrigeration-assisted cooling system, comprising: a cryogenic cold shield, a product platform, a heat transfer chain, a GM refrigerator, an electric heater, a temperature sensor, a temperature controller, a vacuum container, and a support. The GM refrigerator is connected to the vacuum container via a sealed flange. The product platform is mounted and fixed on the cold head flange of the GM refrigerator. The cryogenic cold shield is mounted and fixed inside the vacuum container via the support. The electric heater and temperature sensor are mounted on the cryogenic cold shield and the product platform using an armored method. The electric heater and temperature sensor are connected to the temperature controller located outside the vacuum container via sealed connectors. One end of the heat transfer chain is vacuum brazed to the cryogenic cold shield, and the other end is mounted and fixed to the cold head flange of the GM refrigerator. This invention solves the problems of simulating cryogenic black environments and cryogenic boundaries.

Description

Technical Field

[0001] This invention belongs to the field of space environment simulation technology, and in particular relates to a mechanical refrigeration-assisted cooling system. Background Technology

[0002] To ensure the reliability of spacecraft operations in orbit, tests must be conducted in a simulated space environment on the ground before launch. These tests primarily verify the product's adaptability to the space environment, whether it achieves its specified functions, meets design requirements, and expose defects in component materials, processes, and quality. With the development of deep space exploration, higher demands are being placed on the simulated cold black environment and cryogenic boundaries of space. Certain components of deep space probes require temperatures below 40K, or even below 20K, for their cold black backgrounds and for the verification of certain materials and processes.

[0003] Traditional liquid nitrogen heat sinks for cold black background simulation can only reach a temperature of 100K, which is insufficient to meet the requirements; liquid helium heat sinks for cold black background simulation can reach temperatures below 20K, but they are expensive, have long construction periods, and high operating costs. Summary of the Invention

[0004] The technical problem solved by this invention is to overcome the shortcomings of the prior art and provide a mechanical refrigeration-assisted cooling system, which aims to solve the simulation problems of deep low temperature cold black environment and deep low temperature boundary.

[0005] To solve the above-mentioned technical problems, the present invention discloses a mechanical refrigeration-assisted cooling system, comprising: a deep low-temperature cold shield, a product platform, a heat transfer chain, a GM refrigerator, an electric heater, a temperature sensor, a temperature controller, a vacuum container, and a support.

[0006] The GM refrigeration unit is connected to the vacuum container via a sealed flange;

[0007] The product stand is mounted and fixed on the cold head flange of the GM refrigeration unit;

[0008] The cryogenic cooling shield is mounted and fixed inside the vacuum container using a bracket.

[0009] The electric heater and temperature sensor are mounted on the cryogenic cooling shield and product platform in an armored manner; the electric heater and temperature sensor are connected to the temperature controller located outside the vacuum container through sealed connectors.

[0010] One end of the heat transfer chain is vacuum brazed to the cryogenic cold shield, and the other end is installed and fixed to the cold head flange of the GM refrigeration unit.

[0011] In the aforementioned mechanical refrigeration-assisted cooling system

[0012] Deep low temperature screen, used to provide a deep low temperature cool black background;

[0013] Product platform, used to mount products and facilitate heat transfer through product contact;

[0014] Heat transfer chain, used for heat transfer between GM refrigerator and cryogenic cold shield;

[0015] GM refrigeration units are used to provide a cooling source;

[0016] Electric heaters are used to provide a heat source;

[0017] Temperature sensors are used to measure the temperature of cryogenic cold shields and products;

[0018] The temperature controller is used to collect temperature data measured by the temperature sensor and to power the electric heater, thereby achieving temperature regulation and control of the cryogenic cold shield.

[0019] In the aforementioned mechanical refrigeration-assisted cooling system, the GM refrigeration unit performs refrigeration, transferring heat to the product platform and simultaneously transferring heat indirectly to the cryogenic cold shield via a heat transfer chain, providing the cooling capacity required for both the product platform and the cryogenic cold shield.

[0020] In the aforementioned mechanical refrigeration-assisted cooling system, the electric heater generates heat, which is then transferred to the product platform and the cryogenic cooling screen, providing the product platform and the cryogenic cooling screen with the heat required to compensate for the heating.

[0021] In the aforementioned mechanical refrigeration-assisted cooling system, the temperature controller collects temperature data measured by the temperature sensor and adjusts the heat power of the electric heater through the internal PID controller, thereby achieving precise temperature control of the product platform and the deep cryogenic cold shield.

[0022] In the aforementioned mechanical refrigeration-assisted cooling system, the deep-low temperature cold shield is made of TU2 oxygen-free copper, with the inner surface coated with high-emissivity black paint and the back covered with multiple layers of heat insulation components.

[0023] In the aforementioned mechanical refrigeration-assisted cooling system, the product platform is made of hard aluminum with an array of threaded holes on the surface, which facilitates product installation and installation and fixation with the cold head flange of the GM refrigeration unit.

[0024] In the aforementioned mechanical refrigeration-assisted cooling system, the back of the cryogenic cold shield has reserved interfaces for installing heat transfer chains, electric heaters, and temperature sensors.

[0025] In the aforementioned mechanical refrigeration-assisted cooling system, the heat transfer chain uses TU2 oxygen-free copper braided belt.

[0026] In the aforementioned mechanical refrigeration-assisted cooling system, the electric heater is a resistance heater, which is encapsulated by a copper block. The lower surface of the copper block is machined into an arc or flat surface to fit tightly against the deep low-temperature cold shield and the product platform.

[0027] The present invention has the following advantages:

[0028] (1) This invention discloses a mechanical refrigeration-assisted cooling system, which optimizes the design of the cold background and temperature boundary simulation device to achieve an ultra-wide simulation temperature range of 30K to 400K for the cold background and temperature boundary.

[0029] (2) This invention discloses a mechanical refrigeration-assisted cooling system that uses GM refrigeration technology to achieve a cold background and temperature boundary low-temperature limit temperature of up to 30K.

[0030] (3) This invention discloses a mechanical refrigeration-assisted cooling system, which adopts mature GM refrigeration technology, has a short development cycle, low cost, and low operation and maintenance cost. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the composition of a mechanical refrigeration-assisted cooling system according to an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the packaging of an electric heater according to an embodiment of the present invention. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments disclosed in the present invention will be described in further detail below with reference to the accompanying drawings.

[0034] like Figure 1 In this embodiment, the mechanical refrigeration-assisted cooling system includes: a cryogenic cold shield 1, a product platform 2, a heat transfer chain 3, a GM refrigerator 4, an electric heater 5, a temperature sensor 6, a temperature controller 7, a vacuum container 8, and a support 9. The GM refrigerator 4 is connected to the vacuum container 8 via a sealed flange; the product platform 2 is mounted and fixed to the cold head flange of the GM refrigerator 4; the cryogenic cold shield 1 is mounted and fixed inside the vacuum container 8 via the support 9; the electric heater 5 and the temperature sensor 6 are mounted on the cryogenic cold shield 1 and the product platform 2 using armored mounting; the electric heater 5 and the temperature sensor 6 are connected to the temperature controller 7 located outside the vacuum container 8 via sealed connectors; one end of the heat transfer chain 3 is vacuum brazed to the cryogenic cold shield 1, and the other end is mounted and fixed to the cold head flange of the GM refrigerator 4.

[0035] In this embodiment, the cryogenic cold screen 1 is mainly used to provide a cryogenic cold black background. Specifically, the functions of the cryogenic cold screen 1 include, but are not limited to: serving as the central hub for all modules, acting as the carrier for the cold source (GM refrigerator) and the heat source (electric heater), and simulating the final cryogenic cold background. The product platform 2 is used to mount products and facilitate heat transfer through contact. Specifically, the functions of the product platform 2 include, but are not limited to: serving as a platform for product installation and simulating the product's temperature boundaries. The heat transfer chain 3 is used for heat transfer between the GM refrigerator 4 and the cryogenic cold screen 1. Specifically, the functions of the heat transfer chain 3 include, but are not limited to: transferring the cooling heat from the GM refrigerator 4 to the cryogenic cold screen 1. The GM refrigerator 4 is used to provide a cold source. Specifically, the functions of the GM refrigerator 4 include, but are not limited to: providing the cold source required for cooling the cryogenic cold screen 1 and the product platform 2. The electric heater 5 is used to provide a heat source. Specifically, the functions of the electric heater 5 include, but are not limited to: providing the heat required for heating the cryogenic cold screen 1 and the product platform 2. Temperature sensor 6 is used to measure the temperature of the cryogenic cooling screen 1 and the product. Temperature sensor 6 can be a platinum resistance thermometer, installed on the surface of the cryogenic cooling screen 1 and the product platform 2. The sensing end of temperature sensor 6 is evenly coated with low-volatility thermal grease. Temperature controller 7 is used to collect the temperature data measured by temperature sensor 6 and to power electric heater 5, thereby realizing the temperature regulation and control of cryogenic cooling screen 1.

[0036] In this embodiment, the GM refrigerator 4 provides cooling, and the heat is conducted to the product platform 2 and indirectly to the cryogenic cooling screen 1 via the heat transfer chain 3, providing the cooling capacity required for cooling both the product platform 2 and the cryogenic cooling screen 1. The electric heater 5 provides heating, and the heat is conducted to both the product platform 2 and the cryogenic cooling screen 1, providing the heat required to compensate for the heating. The temperature controller 7 collects the temperature data measured by the temperature sensor 6 and adjusts the heat power of the electric heater 5 through its internal PID control, thereby achieving precise temperature control of the product platform 2 and the cryogenic cooling screen 1.

[0037] In this embodiment, the cryogenic cooling screen 1 is formed by processing TU2 oxygen-free copper, with high emissivity black paint sprayed on the inner surface and multiple layers of heat insulation components on the back.

[0038] In this embodiment, the product platform 2 is made of hard aluminum and has an array of threaded holes on the surface, which facilitates product installation and installation and fixation with the cold head flange of the GM refrigeration unit 4.

[0039] In this embodiment, the back of the cryogenic cooling screen 1 is provided with an interface for installing the heat transfer chain 3, the electric heater 5 and the temperature sensor 6.

[0040] In this embodiment, the heat transfer chain 3 uses TU2 oxygen-free copper braided tape.

[0041] In this embodiment, as Figure 2As shown, the electric heater 5 is a resistance heater, which is encapsulated by a copper block 10. The lower surface of the copper block 10 is processed into an arc or flat surface to fit tightly against the deep low temperature cold screen 1 and the product platform 2.

[0042] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

[0043] The contents not described in detail in this specification are common knowledge to those skilled in the art.

Claims

1. A mechanical refrigeration-assisted cooling system, characterized in that, include: The cryogenic cold shield (1), product platform (2), heat transfer chain (3), GM refrigerator (4), electric heater (5), temperature sensor (6), temperature controller (7), vacuum container (8) and bracket (9); wherein, the GM refrigerator (4) is connected to the vacuum container (8) through a sealing flange; the product platform (2) is installed and fixed on the cold head flange of the GM refrigerator (4); the cryogenic cold shield (1) is installed and fixed inside the vacuum container (8) through the bracket (9); the electric heater (5) and temperature sensor (6) are installed on the cryogenic cold shield (1) and product platform (2) through armoring, and the electric heater (5) and temperature sensor (6) are connected to the temperature controller (7) located outside the vacuum container (8) through sealed connector wiring; one end of the heat transfer chain (3) is vacuum brazed to the cryogenic cold shield (1), and the other end is installed and fixed to the cold head flange of the GM refrigerator (4); The product stand (2) is made of hard aluminum and has an array of threaded holes on the surface, which facilitates product installation and installation and fixing with the cold head flange of the GM refrigeration unit (4); The deep low temperature cold shield (1) is made of TU2 oxygen-free copper, with high emissivity black paint sprayed on the inner surface and multiple layers of heat insulation components on the back. The electric heater (5) is encapsulated by a copper block (10), and the lower surface of the copper block (10) is processed into an arc or a plane to fit tightly against the deep low temperature cold shield (1) and the product platform (2); The GM refrigeration unit (4) cools and conducts heat to the product platform (2), and at the same time conducts heat indirectly to the deep low temperature screen (1) through the heat transfer chain (3), providing the cooling capacity required for the product platform (2) and the deep low temperature screen (1) to cool down; the electric heater (5) heats and conducts heat to the product platform (2) and the deep low temperature screen (1), providing the heat required for the product platform (2) and the deep low temperature screen (1) to heat up and compensate for the heating.

2. The mechanical refrigeration-assisted cooling system according to claim 1, characterized in that, Deep low temperature cold screen (1) is used to provide a deep low temperature cold black background; Product stand (2) is used to install products and to transfer heat to the products in contact with the product; Heat transfer chain (3) is used for heat transfer between GM refrigerator (4) and deep cryogenic cold shield (1); GM refrigeration unit (4) is used to provide a cold source; Electric heater (5) is used to provide a heat source; Temperature sensor (6) is used to measure the temperature of the deep cryogenic cold shield (1) and the product; The temperature controller (7) is used to collect the temperature data measured by the temperature sensor (6) and to power the electric heater (5) to realize the temperature regulation and control of the deep low temperature cold screen (1).

3. The mechanical refrigeration-assisted cooling system according to claim 1, characterized in that, The temperature controller (7) collects the temperature data measured by the temperature sensor (6) and adjusts the heat power of the electric heater (5) through the PID inside the temperature controller (7), thereby achieving precise control of the temperature of the product platform (2) and the deep low temperature cold screen (1).

4. The mechanical refrigeration-assisted cooling system according to claim 1, characterized in that, The back of the deep low temperature cold shield (1) is reserved for the installation of heat transfer chain (3), electric heater (5) and temperature sensor (6).

5. The mechanical refrigeration-assisted cooling system according to claim 1, characterized in that, The heat transfer chain (3) uses TU2 oxygen-free copper braided belt.

6. The mechanical refrigeration-assisted cooling system according to claim 1, characterized in that, The electric heater (5) is a resistance heater.

Images