Thermal control device of laser

Abstract

The invention provides a laser thermal control device, and belongs to the field of refrigeration equipment. The thermal control device comprises a liquid cooling source device, an auxiliary thermal control device and a heat exchange device. Wherein the liquid cooling source device comprises a first refrigeration unit, a first cold storage unit, a first liquid supply unit and a first electric control unit which are connected in sequence, and the auxiliary thermal control device comprises a second refrigeration unit, a second cold storage unit, a second liquid supply unit and a second electric control unit which are connected in sequence; the second refrigeration unit and the first cold storage unit form a loop through a connecting pipeline, the second electric control unit and the first electric control unit communicate through a connecting cable, the second liquid supply unit and the first liquid supply unit form a loop through a connecting pipeline, and the heat exchange device is connected with the liquid cooling source device and the auxiliary thermal control device through pipelines to form a loop. The auxiliary thermal control device, the heat exchange device and the liquid cooling source device work cooperatively, the first-time pre-cooling / pre-heating preparation time of the laser can be remarkably shortened, the auxiliary thermal control device, the heat exchange device and the liquid cooling source device serve as a hot backup of the liquid cooling source device and can be matched with the liquid cooling source devices of different models and grades, in addition, the liquid cooling source device and the multiple auxiliary thermal control devices can work in parallel, and one-belt-multiple-operation is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of refrigeration equipment, and in particular to a laser thermal control device. Background Art

[0002] At present, fiber lasers usually use mature liquid cooling and cold storage solutions for heat dissipation. The external liquid cooling source device supplies coolant with constant temperature. The temperature of the internal components of the laser is precooled / preheated to room temperature through the cold plate before the light is emitted to meet the laser light output power and beam quality requirements. Because the heat dissipation power of the laser is relatively large, the cold storage method is often used. The liquid cooling source device first stores cold to prepare low-temperature coolant. During the laser light output stage, the liquid supply consumes cold energy and the coolant temperature rises. When the initial temperature of the laser is high or low, an external liquid cooling source device is required to precool / preheat it before work. The internal heat dissipation cold plate of the laser mostly uses aluminum as the substrate, which has large mass and large heat capacity. The greater the temperature difference between the initial temperature of the laser before use and the required working temperature, the more cold energy / heat is consumed for precooling / preheating, and the longer the preparation time of the liquid cooling source device.

[0003] In the prior art, the patent with publication number CN113555758A discloses a cold storage liquid cooling system for laser cooling. This patent supplies constant temperature coolant to the laser through temperature control of cold and hot water mixing. Its technical path is the same as the liquid cooling source device, but this path is limited by the refrigeration and heating power of the existing cold storage liquid cooling system, and cannot further improve the refrigeration or heating capacity, resulting in a long preparation time for the laser cold start condition. The patent with publication number CN114883894A discloses an adaptive operation wide temperature control vehicle-mounted laser temperature control device. This patent uses two hot water tanks with different temperatures and a cold water tank, in conjunction with multiple electric proportional three-way valves, to achieve multiple liquid supply temperatures. However, this path can only meet the temperature requirements of a single temperature control unit of the laser load, and the total refrigeration and heating capacity has not changed, and has not been further improved, and the preparation time for the laser cold start cannot be shortened. At present, the liquid cooling sources supporting lasers mostly take into account the functional usage requirements under normal temperature conditions. There is still the problem of long preparation time under low and high temperature conditions. In addition, due to the volume and weight requirements, the marginal cost of liquid cooling sources to improve heating or cooling performance is high, and after the performance is improved, there is a lot of performance margin under normal temperature conditions, resulting in large performance redundancy and poor economy.

[0004] In view of this, it is necessary to provide an improved laser thermal control device to solve the above problems. Summary of the invention

[0005] In view of the problems existing in the background technology, the present application provides a laser thermal control device, which can be coordinated with an existing liquid cooling source device by selecting an external independent auxiliary thermal control device and a heat exchange device to reduce the system's preparation time at high and low temperatures, and can also increase the cooling capacity and thus the light output time, while reducing the cold storage recovery time, and can also serve as a hot backup for the existing liquid cooling source device. The auxiliary thermal control device can select different numbers of auxiliary thermal control devices according to demand, greatly improving the system's operating performance, and the heat exchange device can realize a wide range of temperature-following liquid supply for different liquid supply temperature requirements.

[0006] An embodiment of the present application provides a laser thermal control device, including a liquid cooling source device, an auxiliary thermal control device and a heat exchange device, wherein the liquid cooling source device includes a first refrigeration unit, a first cold storage unit, a first liquid supply unit and a first electric control unit connected in sequence, and the auxiliary thermal control device includes a second refrigeration unit, a second cold storage unit, a second liquid supply unit and a second electric control unit connected in sequence; the second refrigeration unit is connected to the first cold storage unit through a connecting pipe to form a loop, the second electric control unit communicates with the first electric control unit through a connecting cable, the second liquid supply unit and the first liquid supply unit form a loop through a connecting pipe, and the heat exchange device is respectively connected to the liquid cooling source device and the auxiliary thermal control device to form a loop.

[0007] In the technical solution of the embodiment of the present application, in the liquid cooling source device, the first refrigeration unit performs cooling at different ambient temperatures and stores the cooling in the first cold storage unit to supplement the cold capacity of the system; the first liquid supply unit can cooperate with the first cold storage unit to achieve stable release of cold / heat. In the auxiliary thermal control device, the second refrigeration unit performs cooling at different ambient temperatures and stores the cooling in the second cold storage unit to supplement the cold capacity of the system. At the same time, the second refrigeration unit is connected to the first cold storage unit through a connecting pipe to form a loop. The second refrigeration unit can cooperate with the first refrigeration unit to cool the first cold storage unit and improve the precooling capacity of the liquid cooling source device; the second liquid supply unit can be cooperatively controlled with the second refrigeration unit to supplement the cold capacity of the system. At the same time, the second liquid supply unit is connected to the first liquid supply unit through a connecting pipe to form a loop. The auxiliary thermal control device can cooperate with the liquid cooling source device to cool / heat the laser and can also cool / heat the laser when a failure occurs in the liquid cooling source device. When a fault occurs, the auxiliary thermal control device can take on the temperature control work of the liquid cooling source device; the heat exchange device is respectively connected to the liquid cooling source device and the auxiliary thermal control device to form a loop, which can play an auxiliary cooling role when the auxiliary thermal control device cannot meet the cooling demand of the large flow rate of the laser; through the above structure, the auxiliary thermal control device, the heat exchange device and the liquid cooling source device can work together to improve the existing liquid cooling source pre-cooling / preheating capacity, which can not only greatly shorten the first pre-cooling / preheating preparation time for the laser, but also can be used as a hot backup for the liquid cooling source device. In addition, the liquid cooling source device can work in parallel with multiple auxiliary thermal control devices to achieve one-belt-multiple operations, which has guiding significance for the design of laser liquid cooling sources.

[0008] In some embodiments, the first refrigeration unit includes a first plate heat exchanger, a first compressor, a first condenser, a first liquid storage tank, and a first expansion valve which are connected in series via pipelines in sequence; the second refrigeration unit includes a second plate heat exchanger, a second compressor, a second condenser, a second liquid storage tank, and a second expansion valve which are connected in series via pipelines in sequence.

[0009] In the technical solution of the embodiment of the present application, the first refrigeration unit and the second refrigeration unit can perform refrigeration to cool the system at different ambient temperatures.

[0010] In some embodiments, the second compressor is a low temperature compressor, which is used to reduce the temperature of the coolant to below -5°C.

[0011] In the technical solution of the embodiment of the present application, by adopting a low-temperature compressor, lower temperature liquid supply can be achieved for different types of laser loads.

[0012] In some embodiments, the first cold storage unit includes: a first water tank; the second cold storage unit includes: a second water tank.

[0013] In the technical solution of the embodiment of the present application, both the first water tank and the second water tank can store the cold energy prepared by the refrigeration unit to increase the cold energy of the system.

[0014] In some embodiments, the first liquid supply unit includes: a first cold water valve, a first liquid supply pump and a first liquid return valve connected in sequence; one end of the first cold water valve and the first liquid return valve are respectively connected to the first water tank, and the first liquid supply pump and the first liquid return valve also include a third check valve, a first liquid supply valve, a first electric heater and a laser connected in sequence; the first liquid supply unit is provided with a first hot water pipe and a bypass pipe, the first hot water pipe is provided with a first hot water valve, and the bypass pipe is provided with a first bypass valve; the first connection point of the first hot water pipe is located between the first liquid return valve and the laser, the second connection point is located between the first cold water valve and the first liquid supply pump, the third connection point of the bypass pipe is located between the first connection point and the laser, and the fourth connection point is located between the first liquid supply valve and the first electric heater.

[0015] In the technical solution of the embodiment of the present application, the first cold storage unit and the first liquid supply unit are connected, and through the cooperation of the control valve and the first electric heater, the two can jointly cool down / heat up the laser.

[0016] In some embodiments, the second liquid supply unit includes: a second cold water valve, a second liquid supply pump and a second liquid return valve; one end of the second cold water valve and the second liquid return valve are respectively connected to the second water tank through a pipeline, the other end of the second cold water valve is connected to one end of the second liquid supply pump through a pipeline, the other end of the second liquid return valve is connected to the first liquid supply unit through a connecting pipeline 1, and the other end of the second liquid supply pump is connected to the first liquid supply unit through a connecting pipeline 2, the fifth connection point between the connecting pipeline 1 and the first liquid supply unit is located between the first connection point and the third connection point, and the sixth connection point and the fourth connection point of the connecting pipeline 2 and the first liquid supply unit coincide; the connecting pipeline 1 includes a third liquid return valve and a fifth check valve connected in sequence, and the connecting pipeline 2 includes a fourth check valve, a second liquid supply valve, a second electric heater and a third liquid supply valve connected in sequence; the second liquid supply device is provided with a second hot water pipeline, and the second hot water pipeline is provided with a second hot water valve; the seventh connection point of the second hot water pipeline is located between the second liquid return valve and the third liquid return valve, and the eighth connection point is located between the second cold water valve and the second liquid supply pump.

[0017] In the technical solution of the embodiment of the present application, the second cold storage unit is connected to the second liquid supply unit, and the second liquid supply unit is connected to the first liquid supply unit through two connecting pipes. The auxiliary thermal control device can cooperate with the liquid cooling source device through the cooperation of the control valve and the second electric heater to cool down / heat up the laser. It can also replace the liquid cooling source device to cool down / heat up the laser when the liquid cooling source device is not working.

[0018] In some embodiments, the second electric heater includes two electric heaters connected in parallel.

[0019] In the technical solution of the embodiment of the present application, the second electric heater can be coordinated with the second refrigeration device to improve the heating effect. The second electric heater can further improve the heating effect by connecting the two electric heaters in parallel.

[0020] In some embodiments, the first refrigeration unit and the first cold storage unit are connected through a first pipe and a second pipe, the first pipe is provided with a first check valve, and the second pipe is provided with a first internal circulation pump; the second refrigeration unit and the second cold storage unit are connected through a third pipe and a fourth pipe, the third pipe is provided with a second check valve and a first cold storage valve, and the fourth pipe is provided with a second internal circulation pump and a second cold storage valve.

[0021] In the technical solution of the embodiment of the present application, the check valve can prevent the liquid in the cold storage unit from flowing back into the refrigeration unit, the internal circulation pump can realize heat exchange between the coolant in the cold storage unit and the refrigeration unit, and store the cold in the cold storage unit. The cold storage valve can control the flow direction of the cold in the second refrigeration unit.

[0022] In some embodiments, the pipeline connecting the second refrigeration unit and the first cold storage unit includes a connecting pipeline three and a connecting pipeline four; a third cold storage valve is provided on the connecting pipeline three, and a fourth cold storage valve is provided on the connecting pipeline four; the connection point of one end of the connecting pipeline three is located between the first check valve and the first water tank, and the connection point of the other end is located between the second check valve and the first cold storage valve; one end of the connecting pipeline four is located in the first water tank, and the connection point of the other end is located between the second internal circulation pump and the second cold storage valve.

[0023] In the technical solution of the embodiment of the present application, by setting a connecting pipe between the second refrigeration unit and the first cold storage unit, the cold energy in the second refrigeration unit can flow into the first cold storage unit, thereby improving the refrigeration capacity of the liquid cooling source and shortening the precooling time.

[0024] In some embodiments, the heat exchange device includes: a third plate heat exchanger; the third plate heat exchanger is connected to the liquid cooling source device and the auxiliary thermal control device through four pipes, one end of the four pipes is connected to the four end points of the third plate heat exchanger, and the connection points of the other ends of the four pipes are respectively located between the seventh connection point and the third liquid return valve, between the second electric heater and the third liquid supply valve, between the third liquid supply valve and the fourth connection point, and between the third check valve and the first liquid supply valve. The four pipes are respectively provided with a sixth check valve, a second bypass valve, a seventh check valve and a third bypass valve.

[0025] In the technical solution of the embodiment of the present application, the heat exchange device is connected to the liquid cooling source device and the auxiliary thermal control device through pipelines respectively. When the liquid supply flow rate of the liquid cooling source device is greater than that of the auxiliary thermal control device, it can cooperate with the heat exchange device and the auxiliary thermal control device to achieve flow matching and cooling capacity expansion.

[0026] An overview of the technical solution of the present application is given below. In order to enable a clearer understanding of the technical means of the present application, which can be implemented in accordance with the contents of the specification, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are specifically listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings used in the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 Schematic diagram of the operation simulation structure of the laser thermal control device in the embodiment of the present application.

[0029] Description of the reference numerals: 111, first plate heat exchanger; 112, first compressor; 113, first condenser; 114, first liquid storage tank; 115, first expansion valve; 121, first water tank; 131, first electric heater; 141, first internal circulation pump; 142, first check valve; 151, first cold water valve; 152, first liquid return valve; 153, first hot water valve; 154, first liquid supply pump; 155, third check valve; 156, first liquid supply valve; 157, first bypass valve; 16, laser; 211, second plate heat exchanger; 212, second compressor; 213, second condenser; 214, second liquid storage tank; 215, second expansion valve expansion valve; 221, second water tank; 231, second electric heater; 241, second internal circulation pump; 242, second check valve; 243, first cold storage valve; 244, second cold storage valve; 251, second cold water valve; 252, second liquid return valve; 253, second hot water valve; 254, second liquid supply pump; 255, fourth check valve; 256, second liquid supply valve; 311, third plate heat exchanger; 411, third cold storage valve; 412, fourth cold storage valve; 511, third liquid return valve; 512, fifth check valve; 513, third liquid supply valve; 611, sixth check valve; 612, second bypass valve; 613, seventh check valve; 614, third bypass valve. DETAILED DESCRIPTION

[0030] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0032] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0033] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0034] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "connection" and "fixation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0035] In order to solve the technical problems of long preparation time and performance redundancy of laser thermal control devices under low and high temperature conditions, the present application provides a laser thermal control device, which cooperates with an existing liquid cooling source device by selecting an external independent auxiliary thermal control device and a heat exchange device to improve the system cooling / heating performance.

[0036] The present application is further described below in conjunction with specific implementation methods.

[0037] See also Figure 1 The present application provides a laser thermal control device, including a liquid cooling source device, an auxiliary thermal control device and a heat exchange device, wherein the liquid cooling source device includes a first refrigeration unit, a first cold storage unit, a first liquid supply unit and a first electric control unit connected in sequence, and the auxiliary thermal control device includes a second refrigeration unit, a second cold storage unit, a second liquid supply unit and a second electric control unit connected in sequence; the second refrigeration unit is connected to the first cold storage unit through a connecting pipe to form a loop, the second electric control unit communicates with the first electric control unit through a connecting cable, the second liquid supply unit and the first liquid supply unit form a loop through a connecting pipe, and the heat exchange device is respectively connected to the liquid cooling source device and the auxiliary thermal control device to form a loop.

[0038] Through the above-mentioned method, in the liquid cooling source device, the first refrigeration unit performs cooling at different ambient temperatures and stores it in the first cold storage unit to supplement the cold capacity of the system; the first liquid supply unit can cooperate with the first cold storage unit to achieve stable release of cold / heat. In the auxiliary thermal control device, the second refrigeration unit performs cooling at different ambient temperatures and stores it in the second cold storage unit to supplement the cold capacity of the system. At the same time, the second refrigeration unit and the first cold storage unit are connected through a connecting pipe to form a loop. The second refrigeration unit can cooperate with the first refrigeration unit to cool the first cold storage unit and improve the precooling capacity of the liquid cooling source device; the second liquid supply unit can be cooperatively controlled with the second refrigeration unit to supplement the cold capacity of the system. At the same time, the second liquid supply unit and the first liquid supply unit are connected through a connecting pipe to form a loop. The auxiliary thermal control device can cooperate with the liquid cooling source device to cool down / heat the laser 16, and can also cool down / heat up the laser 16 when the liquid cooling source device fails. , the auxiliary thermal control device can take on the temperature control work of the liquid cooling source device; the heat exchange device is respectively connected to the liquid cooling source device and the auxiliary thermal control device to form a loop, which can play an auxiliary cooling role when the auxiliary thermal control device cannot meet the cooling demand of the large flow of laser 16; through the above structure, the auxiliary thermal control device, the heat exchange device and the liquid cooling source device can be realized to work together to improve the existing liquid cooling source pre-cooling / preheating capacity, which can not only greatly shorten the first pre-cooling / preheating preparation time for the laser 16, but also can be used as a hot backup for the liquid cooling source device. In addition, the liquid cooling source device can work in parallel with multiple auxiliary thermal control devices to realize one-belt-multiple operations, which has guiding significance for the design of the liquid cooling source of the laser 16.

[0039] Furthermore, in an embodiment of the present application, the first refrigeration unit includes a first plate heat exchanger 111, a first compressor 112, a first condenser 113, a first liquid storage tank 114, and a first expansion valve 115, which are sequentially connected in series through pipelines; the second refrigeration unit includes a second plate heat exchanger 211, a second compressor 212, a second condenser 213, a second liquid storage tank 214, and a second expansion valve 215, which are sequentially connected in series through pipelines.

[0040] In this embodiment, the first refrigeration unit and the second refrigeration unit can perform refrigeration to cool the system at different ambient temperatures.

[0041] Furthermore, in the embodiment of the present application, the second compressor 212 is a low-temperature compressor, which is used to reduce the temperature of the coolant to below -5°C.

[0042] In this embodiment, by adopting a low-temperature compressor, lower temperature liquid supply can be achieved for different types of laser 16 loads.

[0043] Furthermore, in the embodiment of the present application, the first cold storage unit includes: a first water tank 121 ; the second cold storage unit includes: a second water tank 221 .

[0044] In this embodiment, both the first water tank 121 and the second water tank 221 can store the cold energy prepared by the refrigeration unit, thereby shortening the pre-cooling time.

[0045] Further, in the embodiment of the present application, the first liquid supply unit includes: a first cold water valve 151, a first liquid supply pump 154 ​​and a first liquid return valve 152 connected in sequence; one end of the first cold water valve 151 and the first liquid return valve 152 are respectively connected to the first water tank 121, and the first liquid supply pump 154 ​​and the first liquid return valve 152 also include a third check valve 155, a first liquid supply valve 156, a first electric heater 131 and a laser 16 connected in sequence; the first liquid supply unit is provided with a first hot water pipe and a bypass pipe, the first hot water pipe is provided with a first hot water valve 153, and the bypass pipe is provided with a first bypass valve 157; the first connection point of the first hot water pipe is located between the first liquid return valve 152 and the laser 16, the second connection point is located between the first cold water valve 151 and the first liquid supply pump 154, the third connection point of the bypass pipe is located between the first connection point and the laser 16, and the fourth connection point is located between the first liquid supply valve 156 and the first electric heater 131.

[0046] In this embodiment, the first cold storage unit is connected to the first liquid supply unit, and the two can work together to cool down / heat up the laser 16 through the cooperation of the control valve and the first electric heater 131 .

[0047] Further, in the embodiment of the present application, the second liquid supply unit includes: a second cold water valve 251, a second liquid supply pump 254 and a second liquid return valve 252; one end of the second cold water valve 251 and the second liquid return valve 252 are respectively connected to the second water tank 221 through a pipeline, the other end of the second cold water valve 251 is connected to one end of the second liquid supply pump 254 through a pipeline, the other end of the second liquid return valve 252 is connected to the first liquid supply unit through a connecting pipeline 1, and the other end of the second liquid supply pump 254 is connected to the first liquid supply unit through a connecting pipeline 2, and the fifth connection point of the connecting pipeline 1 and the first liquid supply unit is located at the first connection point and the third connection point. Between the connection points, the sixth connection point and the fourth connection point of the connecting pipe 2 and the first liquid supply unit coincide with each other; the connecting pipe 1 includes a third return liquid valve 511 and a fifth check valve 512 connected in sequence, and the connecting pipe 2 includes a fourth check valve 255, a second liquid supply valve 256, a second electric heater 231 and a third liquid supply valve 513 connected in sequence; the second liquid supply device is provided with a second hot water pipe, and the second hot water pipe is provided with a second hot water valve 253; the seventh connection point of the second hot water pipe is located between the second return liquid valve 252 and the third return liquid valve 511, and the eighth connection point is located between the second cold water valve 251 and the second liquid supply pump 254.

[0048] In this embodiment, the second cold storage unit is connected to the second liquid supply unit, and the second liquid supply unit is connected to the first liquid supply unit through two connecting pipes. The auxiliary thermal control device and the liquid cooling source device can cooperate with each other through the cooperation of the control valve and the second electric heater 231 to cool down / heat up the laser 16. When the liquid cooling source device is not working, the auxiliary thermal control device can replace the liquid cooling source device to cool down / heat up the laser 16.

[0049] Furthermore, in the embodiment of the present application, the second electric heater 231 includes two electric heaters connected in parallel.

[0050] In this embodiment, the second electric heater 231 can be controlled in coordination with the second refrigeration device to improve the heating effect. The second electric heater 231 can further improve the heating effect by connecting two electric heaters in parallel.

[0051] Furthermore, in an embodiment of the present application, the first refrigeration unit and the first cold storage unit are connected via a first pipe and a second pipe, a first check valve 142 is provided on the first pipe, and a first internal circulation pump 141 is provided on the second pipe; the second refrigeration unit and the second cold storage unit are connected via a third pipe and a fourth pipe, a second check valve 242 and a first cold storage valve 243 are provided on the third pipe, and a second internal circulation pump 241 and a second cold storage valve 244 are provided on the fourth pipe.

[0052] In this embodiment, the check valve can prevent the liquid in the cold storage unit from flowing back into the refrigeration unit, the internal circulation pump can realize heat exchange between the coolant in the cold storage unit and the refrigeration unit, and store the cold in the cold storage unit. The second cold storage valve 244 can control the flow direction of the cold in the second refrigeration unit.

[0053] Furthermore, in an embodiment of the present application, the pipeline connecting the second refrigeration unit and the first cold storage unit includes a connecting pipeline three and a connecting pipeline four; a third cold storage valve 411 is provided on the connecting pipeline three, and a fourth cold storage valve 412 is provided on the connecting pipeline four; the connection point of one end of the connecting pipeline three is located between the first check valve 142 and the first water tank 121, and the connection point of the other end is located between the second check valve 242 and the first cold storage valve 243; one end of the connecting pipeline four is located in the first water tank 121, and the connection point of the other end is located between the second internal circulation pump 241 and the second cold storage valve 244.

[0054] In this embodiment, by providing a connecting pipe between the second refrigeration unit and the first cold storage unit, the cold energy in the second refrigeration unit can flow into the first cold storage unit, thereby improving the refrigeration capacity of the liquid cooling source and shortening the precooling time.

[0055] Furthermore, in an embodiment of the present application, the heat exchange device includes: a third plate heat exchanger 311; the third plate heat exchanger 311 is connected to the liquid cooling source device and the auxiliary thermal control device through four pipes, one end of the four pipes is connected to the four end points of the third plate heat exchanger 311, and the connection points of the other ends of the four pipes are respectively located between the seventh connection point and the third liquid return valve 511, between the second electric heater 231 and the third liquid supply valve 513, between the third liquid supply valve 513 and the fourth connection point, and between the third check valve 155 and the first liquid supply valve 156. The four pipes are respectively provided with a sixth check valve 611, a second bypass valve 612, a seventh check valve 613 and a third bypass valve 614.

[0056] In this embodiment, the heat exchange device is connected to the liquid cooling source device and the auxiliary thermal control device through pipelines respectively. When the liquid supply flow rate of the liquid cooling source device is greater than that of the auxiliary thermal control device, it can cooperate with the heat exchange device and the auxiliary thermal control device to achieve flow matching and cooling capacity expansion.

[0057] The working process of the laser thermal control device provided in this application is roughly as follows:

[0058] 1. Laser 16 pre-cooling conditions in high temperature environment

[0059] After the laser 16 and the liquid cooling source device are placed in a high temperature environment for a period of time, the temperature of the internal components of the laser 16 is basically consistent with the high temperature environment temperature. At the same time, the temperature of the coolant in the first water tank 121 of the liquid cooling source device is also high, and the remaining cold capacity is small. It is necessary to prepare cold capacity again for the precooling of the laser 16 and the subsequent laser 16 light emission. The auxiliary thermal control device has stored cold in place in advance, and a large amount of cold capacity is stored in the second water tank 221. At this time, the first liquid return valve 152, the first hot water valve 153, the first bypass valve 157, the third liquid return valve 511, and the third liquid supply valve 513 are opened, and the second bypass valve 612 and the third bypass valve 614 are closed. The target temperature of the liquid supply of the auxiliary thermal control device is consistent with that of the liquid cooling source device, and the second liquid supply pump 254, the second cold water valve 251, the second liquid return valve 252, and the second hot water valve 253 are opened to automatically adjust the target liquid supply temperature and keep it stable, so as to achieve rapid precooling of the laser 16. When the precooling of the laser 16 is completed, the third liquid return valve 511 and the third liquid supply valve 513 are closed, and the auxiliary thermal control device stops working.

[0060] 2. Laser 16 preheating conditions in low temperature environment

[0061] After the laser 16 and the liquid cooling source device are placed in a low temperature environment for a period of time, the temperature of the internal components of the laser 16 is basically consistent with the low temperature environment temperature, and the liquid cooling source device is required to preheat the laser 16. Because the heating power of the liquid cooling source device is low, the preheating time is long. At this time, the first liquid return valve 152, the first hot water valve 153, the first bypass valve 157, the third liquid return valve 511, and the third liquid supply valve 513 are opened, and the second bypass valve 612 and the third bypass valve 614 are closed. The target liquid supply temperature of the auxiliary thermal control device is consistent with the liquid cooling source device, the second liquid supply pump 254, the second cold water valve 251, the second liquid return valve 252 and the second hot water valve 253 are opened, and the target liquid supply temperature is automatically adjusted and kept stable. The second electric heater 231 of the auxiliary thermal control device is automatically opened, and the first electric heater 131 can also be opened at this time to increase the total heating power of the system and shorten the preheating preparation time. When the preheating of the laser 16 is completed, the second electric heater 231 , the first electric heater 131 and the auxiliary thermal control device stop working, and the third liquid return valve 511 and the third liquid supply valve 513 are closed.

[0062] 3. In the laser 16 light emitting stage

[0063] The third liquid return valve 511 and the third liquid supply valve 513 are in a closed state, and the liquid cooling source device opens the first cold water valve 151, the first liquid return valve 152, and the first hot water valve 153 to automatically adjust the liquid supply temperature to the target setting value. When the cold capacity of the liquid cooling source device is consumed, the liquid supply temperature cannot meet the light emission requirements of the laser 16. When the liquid supply flow rate of the auxiliary thermal control device is greater than that of the liquid cooling source device, the third liquid return valve 511 and the third liquid supply valve 513 are opened, the first liquid return valve 152, the first hot water valve 153, the first bypass valve 157, the second bypass valve 612, and the third bypass valve 614 are closed, the liquid supply target temperature of the auxiliary thermal control device is consistent with that of the liquid cooling source device, the second liquid supply pump 254 is opened, and the auxiliary thermal control device opens the second cold water valve 251, the second liquid return valve 252, and the second hot water valve 253 to automatically adjust the target liquid supply temperature and liquid supply flow and keep them stable, and the laser 16 can consume the cold capacity in the second water tank 221 to continue to emit light. In addition, in the light-emitting stage, the auxiliary thermal control device can be used as a hot backup for the liquid cooling source device. When the liquid cooling source device fails and cannot supply liquid, it can be switched to the auxiliary thermal control device for liquid supply to meet the light-emitting heat dissipation requirements of the laser 16. When the liquid supply flow rate of the liquid cooling source device is greater than that of the auxiliary thermal control device, the first liquid supply valve 156, the third liquid return valve 511, the third liquid supply valve 513, the first cold water valve 151, the first liquid return valve 152, and the first bypass valve 157 can be closed, and the second bypass valve 612, the third bypass valve 614, and the first hot water valve 153 can be opened. At the same time, the liquid supply temperature of the auxiliary thermal control device is set to be lower than that of the liquid cooling source device, and the second liquid supply pump 254 is turned on. The auxiliary thermal control device automatically adjusts to the target liquid supply temperature by opening the second cold water valve 251, the second liquid return valve 252, and the second hot water valve 253, and performs heat exchange with the large-flow cooling liquid of the liquid cooling source device through the third plate heat exchanger 311. The auxiliary thermal control device and the heat exchange device cooperate to meet the large flow temperature control of the liquid cooling source device through a small flow of liquid supply, so that the auxiliary thermal control device can "use small to lead large". In short, the auxiliary thermal control device can match with thermal control devices of different specifications through the third plate heat exchanger 311, and achieve cooling capacity expansion through collaborative work.

[0064] 4. In the cold storage recovery stage

[0065] The second refrigeration unit of the auxiliary thermal control device can be used to assist in refrigerating the first water tank 121 of the liquid cooling source device, thereby increasing the refrigeration power of the liquid cooling source device and reducing the system cold storage recovery time. The first refrigeration unit of the liquid cooling source device starts to work, and the first internal circulation pump 141 in the liquid cooling source device drives the coolant in the first water tank 121 to enter the first plate heat exchanger 111 to exchange heat with the refrigerant, thereby cooling the coolant; at this time, the third cold storage valve 411 and the fourth cold storage valve 412 are opened, and the first cold storage valve 243 and the second cold storage valve 244 are closed. The second refrigeration unit in the auxiliary thermal control device starts to work, and the second internal circulation pump 241 extracts the coolant in the first water tank 121 into the second plate heat exchanger 211 to exchange heat with the refrigerant, thereby cooling the coolant. By operating the first refrigeration unit and the second refrigeration unit in parallel, the system cold storage recovery time is significantly shortened, so that the laser 16 can quickly reach the light emitting state. When the coolant in the first water tank 121 reaches the target temperature, the cold storage is completed. At this time, the third cold storage valve 411 and the fourth cold storage valve 412 are closed, the first cold storage valve 243 and the second cold storage valve 244 are opened, the second refrigeration unit is started, and the second internal circulation pump 241 extracts the coolant in the second water tank 221 into the second plate heat exchanger 211 to exchange heat with the refrigerant, cools down the coolant in the second water tank 221, and realizes cold capacity recovery as a subsequent cold capacity supplement. In addition, the second compressor 212 in the second refrigeration unit can use a low-temperature compressor. If there is sufficient preparation time, the temperature of the coolant in the first water tank 121 and the second water tank 221 can be reduced to a lower level. On the one hand, more cold capacity can be stored, and on the other hand, the temperature-following liquid supply in a wider temperature range of the auxiliary thermal control device can be satisfied.

[0066] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are only examples, and the embodiments having the same structure as the technical idea and exerting the same effect within the scope of the technical solution of the present application are all included in the technical scope of the present application. In addition, without departing from the scope of the main purpose of the present application, various modifications that can be thought of by those skilled in the art to the embodiments and other methods of combining some of the constituent elements in the embodiments are also included in the scope of the present application.

Claims

1. A laser thermal control device, characterized in that: It includes a liquid cooling source device, an auxiliary thermal control device and a heat exchange device, wherein the liquid cooling source device includes a first refrigeration unit, a first cold storage unit, a first liquid supply unit and a first electric control unit connected in sequence, and the auxiliary thermal control device includes a second refrigeration unit, a second cold storage unit, a second liquid supply unit and a second electric control unit connected in sequence; the second refrigeration unit and the first cold storage unit are connected to form a loop through a connecting pipe, the second electric control unit and the first electric control unit communicate through a connecting cable, the second liquid supply unit and the first liquid supply unit form a loop through a connecting pipe, and the heat exchange device is respectively connected to the liquid cooling source device and the auxiliary thermal control device to form a loop.

2. A laser thermal control device according to claim 1, characterized in that: The first refrigeration unit includes a first plate heat exchanger, a first compressor, a first condenser, a first liquid storage tank, and a first expansion valve which are connected in series via pipelines in sequence; the second refrigeration unit includes a second plate heat exchanger, a second compressor, a second condenser, a second liquid storage tank, and a second expansion valve which are connected in series via pipelines in sequence.

3. A laser thermal control device according to claim 2, characterized in that: The second compressor is a low-temperature compressor, which is used to reduce the temperature of the coolant to below -5°C.

4. A laser thermal control device according to claim 1, characterized in that: The first cold storage unit includes: a first water tank; the second cold storage unit includes: a second water tank.

5. A laser thermal control device according to claim 4, characterized in that: The first liquid supply unit includes: a first cold water valve, a first liquid supply pump and a first liquid return valve connected in sequence; one end of the first cold water valve and the first liquid return valve are respectively connected to the first water tank, and the first liquid supply pump and the first liquid return valve also include a third check valve, a first liquid supply valve, a first electric heater and a laser connected in sequence; the first liquid supply unit is provided with a first hot water pipe and a bypass pipe, the first hot water pipe is provided with a first hot water valve, and the bypass pipe is provided with a first bypass valve; the first connection point of the first hot water pipe is located between the first liquid return valve and the laser, the second connection point is located between the first cold water valve and the first liquid supply pump, the third connection point of the bypass pipe is located between the first connection point and the laser, and the fourth connection point is located between the first liquid supply valve and the first electric heater.

6. A laser thermal control device according to claim 4, characterized in that: The second liquid supply unit comprises: a second cold water valve, a second liquid supply pump and a second liquid return valve; one end of the second cold water valve and the second liquid return valve are respectively connected to the second water tank through a pipeline, the other end of the second cold water valve is connected to one end of the second liquid supply pump through a pipeline, the other end of the second liquid return valve is connected to the first liquid supply unit through a connecting pipeline 1, and the other end of the second liquid supply pump is connected to the first liquid supply unit through a connecting pipeline 2, the fifth connection point between the connecting pipeline 1 and the first liquid supply unit is located between the first connection point and the third connection point, and the sixth connection point and the fourth connection point between the connecting pipeline 2 and the first liquid supply unit coincide; the connecting pipeline 1 comprises a third liquid return valve and a fifth check valve connected in sequence, and the connecting pipeline 2 comprises a fourth check valve, a second liquid supply valve, a second electric heater and a third liquid supply valve connected in sequence; the second liquid supply device is provided with a second hot water pipeline, and the second hot water pipeline is provided with a second hot water valve; the seventh connection point of the second hot water pipeline is located between the second liquid return valve and the third liquid return valve, and the eighth connection point is located between the second cold water valve and the second liquid supply pump.

7. A laser thermal control device according to claim 6, characterized in that: The second electric heater includes two electric heaters connected in parallel.

8. A laser thermal control device according to claim 4, characterized in that: The first refrigeration unit and the first cold storage unit are connected through a first pipeline and a second pipeline, the first pipeline is provided with a first check valve, and the second pipeline is provided with a first internal circulation pump; the second refrigeration unit and the second cold storage unit are connected through a third pipeline and a fourth pipeline, the third pipeline is provided with a second check valve and a first cold storage valve, and the fourth pipeline is provided with a second internal circulation pump and a second cold storage valve.

9. A laser thermal control device according to claim 8, characterized in that: The pipeline connecting the second refrigeration unit and the first cold storage unit includes a connecting pipeline three and a connecting pipeline four; a third cold storage valve is arranged on the connecting pipeline three, and a fourth cold storage valve is arranged on the connecting pipeline four; a connection point at one end of the connecting pipeline three is located between the first check valve and the first water tank, and a connection point at the other end is located between the second check valve and the first cold storage valve; one end of the connecting pipeline four is located in the first water tank, and a connection point at the other end is located between the second internal circulation pump and the second cold storage valve.

10. A laser thermal control device according to claim 9, characterized in that: The heat exchange device includes: a third plate heat exchanger; the third plate heat exchanger is connected to the liquid cooling source device and the auxiliary thermal control device through four pipes, one ends of the four pipes are respectively connected to the four end points of the third plate heat exchanger, and the connection points of the other ends of the four pipes are respectively located between the seventh connection point and the third liquid return valve, between the second electric heater and the third liquid supply valve, between the third liquid supply valve and the fourth connection point, and between the third check valve and the first liquid supply valve. The four pipes are respectively provided with a sixth check valve, a second bypass valve, a seventh check valve and a third bypass valve.

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