Laser cooling system

Abstract

The invention belongs to the technical field of laser cooling, and discloses a laser cooling system which comprises a refrigerant loop, a control assembly and a detection device, the refrigerant loop comprises a compressor, a condenser and a plurality of cooling flow paths which are connected in sequence, and the plurality of cooling flow paths are connected to the refrigerant loop in parallel. The cooling flow path is provided with a first valve device and a cold plate used for arranging a heat source, the refrigerant output end of the cold plate is provided with a detection device and a pressure adjusting device, and the detection device is used for detecting the pressure and / or temperature of a refrigerant; the cooling device further comprises a plurality of adjusting flow paths connected with the cooling flow paths respectively. The multiple low-power cooling flow paths are connected in parallel in the refrigerant loop, higher-power heat dissipation can be achieved, due to the fact that the parallel connection mode is adopted, all parallel loops can be controlled, partitioned temperature control is achieved, and meanwhile independent temperature control of a single flow path module and more accurate refrigeration adjustment can be achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of laser cooling, and in particular relates to a laser cooling system. Background Art

[0002] Existing refrigerant direct cooling systems are mostly single-circuit or dual-circuit, and cannot achieve zoned temperature control. Since the heat sources are all arranged on the main circuit, when the thermal power increases to a certain level, the air flow velocity generated by evaporation reaches its limit, and the refrigeration capacity cannot be increased, and higher-power heat dissipation cannot be achieved. Moreover, when the thermal power is even greater, it is impossible to resist the thermal shock of the instantaneous increase in thermal power, resulting in large temperature fluctuations. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a laser cooling system to solve the problem that the existing laser cooling system cannot perform zone temperature control and higher power heat dissipation.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A laser cooling system comprises a refrigerant circuit, a control component and a detection device, wherein the refrigerant circuit comprises a compressor, a condenser and a cooling flow path connected in sequence, wherein a plurality of cooling flow paths are provided, and the plurality of cooling flow paths are connected in parallel to the refrigerant circuit, wherein a valve device and a cold plate for setting a heat source are provided on the cooling flow path, and a detection device and a pressure regulating device are provided at a refrigerant output end of the cold plate, wherein the detection device is used to detect the refrigerant pressure and / or temperature;

[0006] It also includes a plurality of regulating flow paths respectively connected to a cooling flow path, wherein the regulating flow paths are connected between the refrigerant input end of the cold plate and the refrigerant input end of the condenser, and a valve device 2 is provided on the regulating flow paths;

[0007] The control assembly includes a main control device and a sub-control device. The sub-control device is connected to valve device 1, valve device 2, a pressure regulating device and a detection device on each cooling flow path. The main controller is connected to each sub-control device and a compressor.

[0008] In a possible implementation, a refrigerant storage tank is provided on the main circuit of the refrigerant circuit, and the refrigerant storage tank is connected to the refrigerant outlet end of the condenser.

[0009] In a possible implementation, the condenser is provided with a cooling fan connected to the main control device, and an air outlet of the cooling fan is provided with an air outlet regulating component, and the air outlet regulating component is used to adjust an air outlet area of ​​the air outlet.

[0010] In a possible implementation, the air outlet adjustment component includes an air outlet cover and a driving mechanism. The air outlet cover is arranged at the air outlet of the cooling fan. A plurality of rotatable guide blades are arranged side by side on the inner side of the air outlet cover. The guide blades are connected by a linkage rod, and the driving mechanism drives the guide blades to rotate.

[0011] In a possible implementation, the guide vane is rotatably arranged on the inner side of the air outlet cover plate via a rotating shaft, a sliding connection portion is provided at the free end of the guide vane, the driving mechanism includes a driving motor and a transmission component, the driving motor drives the transmission component to rotate, and the free end of the transmission component slides with the sliding connection portion to drive the guide vane to rotate around the rotating shaft.

[0012] In a possible implementation, the cold plate is provided with a temperature detection device 1, and the temperature detection device 1 is connected to a corresponding sub-control device.

[0013] In a possible implementation, a pressure detection device 1 is provided at the refrigerant inlet end of the condenser, and the pressure detection device 1 is connected to a main control device.

[0014] In a possible implementation, the main control device is connected to an ambient temperature detection device.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The laser cooling system of the present invention can achieve higher power heat dissipation such as 12000W and 18000W by connecting multiple low-power cooling flow paths in parallel in the refrigerant circuit. Since the parallel connection is adopted, each parallel circuit can be controlled to achieve zoned temperature control, and by respectively configuring regulating flow paths and pressure regulating devices and valve devices for the cooling flow paths, independent temperature control of a single flow path module and more precise refrigeration regulation can be achieved.

[0017] Moreover, through the setting of the liquid storage tank, liquid refrigerant can be replenished in the case of instantaneous power changes, thereby improving the system response speed and being more adaptable to heat dissipation of greater power.

[0018] In addition, the segmented control of the fan allows continuous adjustment of the air volume, making the temperature control more precise and smoother. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the piping structure of a laser cooling system;

[0020] Figure 2 A schematic diagram of the three-dimensional structure of a heat dissipation fan of a laser cooling system;

[0021] Figure 3It is a schematic diagram of the three-dimensional structure of an air outlet cover plate of a heat dissipation fan of a laser cooling system in a rearward direction;

[0022] Figure 4 The present invention is a schematic diagram of the power transmission structure of a driving mechanism of an air outlet cover plate of a heat dissipation fan of a laser cooling system.

[0023] In the figure: 1-main control device; 2-compressor; 3-cooling flow path; 31-valve device 1; 32-heat source; 33-cold plate; 34-temperature detection device 1; 35-pressure regulating device; 36-sub-control device; 37-detection device; 4-regulating flow path; 41-valve device 2; 5-condenser; 51-pressure detection device 1; 6-cooling fan; 61-frame; 62-guide vane; 63-drive motor; 64-transmission component; 65-slide hole; 66-sliding connection; 67-linkage rod; 7-refrigeration tank; 8-ambient temperature detection device. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with specific implementation methods.

[0025] Please refer to Figure 1 As shown, an embodiment of the present application provides a laser cooling system, including a refrigerant circuit, a control component and a detection device 37, wherein the refrigerant circuit includes a compressor 2, a condenser 5 and a cooling flow path 3 connected in sequence, wherein a plurality of cooling flow paths 3 are provided, and the plurality of cooling flow paths 3 are connected in parallel to the refrigerant circuit, wherein a valve device 31 and a cold plate 33 for setting a heat source 32 are provided on the cooling flow path 3, and a detection device 37 and a pressure regulating device 35 are provided at the refrigerant output end of the cold plate 33, and the detection device 37 is used to detect the refrigerant pressure and / or temperature.

[0026] Among them, the refrigerant circuit is a refrigeration circuit in which the refrigerant circulates, and the compressor 2, cooling flow path 3, condenser 5 and other devices in the refrigerant circuit are connected by copper tubes. In this refrigeration circuit, multiple cooling flow paths 3 are provided and connected in parallel in the refrigeration circuit, and multiple cooling flow paths 3 are used to cool and dissipate heat for the heating devices respectively to achieve zoned heat dissipation; the cold plate 33 is used to cool the heating devices, and a micro-pipe structure for the circulation of the refrigerant is arranged therein, so that the heat generated by the heat source 32 can be transferred to the refrigerant through the cold plate 33, the refrigerant evaporates and absorbs heat, and the refrigerant evaporated into gas is compressed by the compressor 2 to become high-pressure and high-temperature gas and circulates to the condenser 5, and the gas heat is transferred to the fins of the condenser 5 for heat dissipation, and the heat on the fins is taken away by air cooling, so that the refrigerant is condensed and then circulated to each cooling flow path 3 to form a cycle. The detection device 37 arranged at the refrigerant output end of the cold plate 33 is used to detect the refrigerant pressure and / or temperature. By acquiring the temperature and / or pressure data of the refrigerant, it is possible to more accurately adjust the temperature and pressure of the refrigerant before it flows into the cold plate 33, thereby achieving the cooling force adjustment of the cold plate 33. The pressure regulating device 35 is used to adjust the pressure parameters of the refrigerant at the refrigerant outlet end of the cold plate 33 to achieve independent temperature control.

[0027] In an embodiment of the present application, it may also include a plurality of regulating flow paths 4 respectively connected to a cooling flow path, wherein the regulating flow path 4 is connected between the refrigerant input end of the cold plate 33 and the refrigerant input end of the condenser 5 , and a valve device 2 41 is provided on the regulating flow path 4 .

[0028] The number of regulating channels 4 is consistent with the number of cooling channels 3, and they are also arranged in parallel. Each regulating channel 4 is used to regulate one cooling channel 3. The high-pressure refrigerant can be adjusted through the parallel valve device 2 41 to achieve the adjustment of the refrigeration capacity. The valve device 1 31 on the cooling channel 3 can make the adjustment more accurate, and through such a one-way circulation refrigeration structure, the refrigeration effect is more stable and the error is smaller. The valve device 2 41 on the regulating channel 4 can adjust the high-pressure and high-temperature refrigerant flow that has not been dissipated by the condenser 5 and flows to the cooling channel 3, and the valve device 1 31 can adjust the high-pressure and low-temperature refrigerant flow after the condenser 5 dissipates heat. In this way, refrigerants of different temperatures can be combined into the refrigerant inlet end of the cold plate 33, and the cooling temperature of the cold plate 33 can be increased or decreased by adjusting the refrigerant flow of different channels respectively, thereby achieving a larger temperature range of adjustment and stronger adjustment ability.

[0029] The control assembly may include a main control device 1 and a sub-control device 36, wherein the sub-control device 36 is connected to a valve device 1 31, a valve device 2 41, a pressure regulating device 35 and a detection device 37 on each cooling flow path 3, and the main controller is connected to each sub-control device 36 and a compressor 2. The main controller is connected to the compressor 2 driving circuit board, and can issue instructions to control the frequency of the compressor 2, and the compressor 2 driving board is connected to the compressor 2 to drive the compressor 2 to work. The main controller is also connected to the sub-control devices 36 on each cooling flow path 3, and sends control instructions and reads data. The detection device 37 of the cold plate 33 is connected through the sub-control device 36 to read the temperature data of the cold plate 33, the pressure data and the temperature data at the outlet of the cold plate 33. The sub-control device 36 is also connected to the valve device 1 31, the valve device 2 41 and the pressure regulating device 35 on the corresponding cooling flow path 3 to control the opening size of the valve respectively.

[0030] It is understandable that the existing refrigerant direct cooling system is mostly single-circuit or double-circuit. Since the heat source 32 is arranged on the main circuit, the heat source 32 is connected in series. When the power increases to a certain level, the gas flow rate generated by evaporation reaches the limit and cannot be increased. The power cannot be increased, and there is only one series cold plate 33, and temperature zoning control cannot be achieved. The embodiment of the present application adopts the method of connecting the heat source 32 in parallel. For example, a single cooling flow path 3 can achieve 6000W heat dissipation. This solution can achieve higher power heat dissipation such as 12000W and 18000W. Since the parallel method is adopted, each parallel circuit can be controlled to achieve zoned temperature control.

[0031] Through the above technical solution, multiple low-power cooling paths 3 are connected in parallel in the refrigerant circuit to achieve higher power heat dissipation such as 12000W, 18000W, etc. Since the parallel method is adopted, each parallel circuit can be controlled to achieve zone temperature control, and by respectively configuring the cooling path 3 with a regulating path 4, a pressure regulating device 35 and a valve device 31, independent temperature control of a single path module and more precise refrigeration regulation can be achieved.

[0032] In one embodiment, a refrigerant storage tank 7 is provided on the main circuit of the refrigerant circuit, and the refrigerant storage tank 7 is connected to the refrigerant outlet end of the condenser 5 .

[0033] As the heat power increases, the condensation of the refrigerant produced by the instantaneous heat power loading requires a process and there is a lag. The refrigerant cannot meet the instantaneous refrigerant demand, and the temperature control fluctuates greatly. By setting a liquid storage tank on the refrigerant circuit, the problem of large fluctuations in temperature control under instantaneous heat power loading can be solved, and the temperature control fluctuation can be reduced.

[0034] In order to achieve stable and controllable heat dissipation of the condenser 5, further, combined with Figure 2-Figure 4As shown, the condenser 5 is provided with a cooling fan 6 connected to the main control device 1 , and an air outlet of the cooling fan 6 is provided with an air outlet regulating component, and the air outlet regulating component is used to adjust the air outlet area of ​​the air outlet.

[0035] The cooling fan 6 of the existing refrigerant direct cooling system cannot achieve stepless speed regulation from zero to maximum, and can only achieve start-stop control at low speed. In a low temperature environment below 0°C, a low speed is required, and the cooling fan 6 can only be achieved in a start-stop manner, resulting in a steep increase in the speed of the cooling fan 6, causing large temperature fluctuations. However, after the cooling fan 6 is provided with an air outlet adjustment component, the air outlet area of ​​the cooling fan 6 can be adjusted according to actual conditions or needs, and the air volume can be adjusted steplessly, which effectively reduces the fluctuation of temperature control and makes the temperature control fluctuation extremely small.

[0036] In a preferred embodiment of the air outlet regulating component, the air outlet regulating component includes an air outlet cover and a driving mechanism. The air outlet cover is arranged at the air outlet of the cooling fan 6. A plurality of rotatable guide blades 62 are arranged side by side on the inner side of the air outlet cover. The guide blades 62 are connected by a linkage rod 67. The driving mechanism drives the guide blades 62 to rotate.

[0037] Among them, the air outlet cover is similar to a shutter structure, which includes a frame 61 and a plurality of guide blades 62 arranged on the inner side of the frame 61. The guide blades 62 are arranged on the inner side of the frame 61 by rotating the rotating shaft, so that the guide blades 62 can rotate, and the guide blades 62 are connected by a linkage rod 67 at the same time. In this way, when the driving mechanism drives one of the guide blades 62 to rotate, the other guide blades 62 can also rotate synchronously, thereby realizing effective adjustment of the air outlet area of ​​the cooling fan 6.

[0038] Specifically, the guide vane 62 is rotatably arranged on the inner side of the air outlet cover plate through a rotating shaft, and a sliding connection part 66 is arranged at the free end of the guide vane 62. The driving mechanism includes a driving motor 63 and a transmission member 64. The driving motor 63 drives the transmission member 64 to rotate, and the free end of the transmission member 64 slides with the sliding connection part 66 to drive the guide vane 62 to rotate around the rotating shaft. One side of the upper and lower ends of the guide vane 62 is connected to the inner side of the air outlet cover plate through a rotating shaft, and a sliding connection part 66 is arranged at the other end of the bottom of the guide vane 62. The sliding connection part 66 includes a sliding hole 65 with a waist-shaped long hole structure, and one end of the transmission member 64 can be slidably connected with the sliding hole 65 through a pin shaft, and the other end is connected to the output end of the driving motor 63, so that when the driving motor 63 rotates, the transmission member 64 can be driven to swing, so that the free end of the guide vane 62 can be driven to rotate, thereby realizing the adjustment of the size of the air outlet area. The rotation angle of the drive motor 63 can be adjusted by the main control device 1 according to temperature and / or pressure data.

[0039] During the specific implementation process, the control of the cooling fan 6 is divided into two sections, one section is the air volume control of high air volume, and the other section is the air volume control of low air volume. The high air volume control is to directly control the rotation speed of the cooling fan 6 to achieve air volume regulation, and the low air volume control is to run the cooling fan 6 at a low constant speed, and drive the guide blade 62 to rotate by adjusting the driving motor 63 such as the servo gear, thereby achieving the adjustment of the air outlet area and the continuous adjustment of the air volume.

[0040] In order to detect the temperature of the cold plate 33, please continue to refer to Figure 1 As shown, the cold plate 33 may also be provided with a temperature detection device 34, and the temperature detection device 34 is connected to the corresponding sub-control device 36. The temperature detection device 34 is used to detect the current temperature data of the cold plate 33 and feed it back to the sub-control device 36, and the sub-control device 36 controls the opening size of the corresponding valve to adjust according to the temperature condition.

[0041] The refrigerant inlet end of the condenser 5 may also be provided with a pressure detection device 51, and the pressure detection device 51 is connected to the main control device 1. The pressure detection device 51 can detect the pressure data of the refrigerant input end of the condenser 5, so as to control the heat dissipation strength of the heat dissipation fan 6 according to the pressure data.

[0042] On this basis, the main control device 1 can also be connected to an ambient temperature detection device 8, which can detect ambient temperature data and make adjustments based on the ambient temperature data. The above-mentioned temperature or pressure detection devices all use sensors for detection.

[0043] In the specific implementation process, the control of compressor 2 is to control the frequency of compressor 2 according to the collected ambient temperature and the required cooling capacity; the control of voltage regulating device 35, the sub-control device 36 calculates the opening of voltage regulating device 35 according to the temperature information of cold plate 33 sent by main control device 1 and adjusts it to the corresponding opening value; the control of valve device 1 31 is to adjust the valve according to the difference between the temperature and pressure conversion temperature collected by detection device 37 such as temperature and pressure sensor and the set value; the control of valve device 2 41 is to adjust the valve according to the pressure data collected by temperature and pressure sensor and the set value. The specific control algorithm of the above-mentioned devices belongs to the prior art and does not belong to the improvement point of this application, so it will not be repeated.

[0044] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention, and the protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A laser cooling system, characterized in that: The invention comprises a refrigerant circuit, a control component and a detection device (37), wherein the refrigerant circuit comprises a compressor (2), a condenser (5) and a cooling flow path (3) connected in sequence, wherein a plurality of cooling flow paths (3) are provided, and the plurality of cooling flow paths (3) are connected in parallel to the refrigerant circuit, wherein a valve device (31) and a cold plate (33) for arranging a heat source (32) are provided on the cooling flow path (3), and a detection device (37) and a pressure regulating device (35) are provided at the refrigerant output end of the cold plate (33), and the detection device (37) is used to detect the refrigerant pressure and / or temperature; It also includes a plurality of regulating flow paths (4) respectively connected to a cooling flow path (3), the regulating flow path (4) being connected between a refrigerant input end of the cold plate (33) and a refrigerant input end of the condenser (5), and a second valve device (41) being provided on the regulating flow path (4); The control assembly comprises a main control device (1) and a plurality of sub-control devices (36) respectively configured for each cooling flow path (3); the sub-control device (36) is connected to a valve device 1 (31), a valve device 2 (41), a pressure regulating device (35) and a detection device (37) on the corresponding cooling flow path (3); and the main controller is connected to each sub-control device (36) and a compressor (2).

2. A laser cooling system according to claim 1, characterized in that: A refrigerant storage tank (7) is provided on the main circuit of the refrigerant circuit, and the refrigerant storage tank (7) is connected to the refrigerant outlet end of the condenser (5).

3. A laser cooling system according to claim 1, characterized in that: The condenser (5) is provided with a cooling fan (6) connected to the main control device (1), and the air outlet of the cooling fan (6) is provided with an air outlet adjustment component, and the air outlet adjustment component is used to adjust the air outlet area of ​​the air outlet.

4. A laser cooling system as claimed in claim 3, characterized in that: The air outlet adjustment component comprises an air outlet cover and a driving mechanism. The air outlet cover is arranged at the air outlet of the cooling fan (6). A plurality of rotatable guide blades (62) are arranged side by side on the inner side of the air outlet cover. The guide blades (62) are connected by a linkage rod (67). The driving mechanism drives the guide blades (62) to rotate.

5. A laser cooling system as claimed in claim 4, characterized in that: The guide vane (62) is rotatably arranged on the inner side of the air outlet cover plate via a rotating shaft, a sliding connection portion (66) is provided at the free end of the guide vane (62), and the driving mechanism comprises a driving motor (63) and a transmission component (64), the driving motor (63) drives the transmission component (64) to rotate, and the free end of the transmission component (64) and the sliding connection portion (66) are slidably matched to drive the guide vane (62) to rotate around the rotating shaft.

6. A laser cooling system according to claim 1, characterized in that: The cold plate (33) is provided with a temperature detection device (34), and the temperature detection device (34) is connected to a corresponding sub-control device (36).

7. A laser cooling system according to claim 1, characterized in that: A pressure detection device (51) is provided at the refrigerant inlet end of the condenser (5), and the pressure detection device (51) is connected to the main control device (1).

8. A laser cooling system according to claim 1, characterized in that: The main control device (1) is connected to an ambient temperature detection device (8).

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