Laser power supply system and method for merging unit to far-end module

Abstract

The invention belongs to the technical field of laser power supply, and relates to a laser power supply system and method for a merging unit to a far-end module, and the system comprises the merging unit and the far-end module. A CPU control module and an electric heating refrigeration unit are integrated in the merging unit; the electric heating refrigeration unit comprises an electric heating refrigeration power supply module, an electric heating refrigeration driving circuit and an electric heating refrigeration module which are connected in sequence; the electric heating refrigeration module comprises a cold end and a hot end, and the electric heating refrigeration driving circuit, the cold end and the hot end form a loop; the CPU control module is connected with the cold end and the hot end and is used for controlling the electric heating refrigeration driving circuit to refrigerate or heat; the far-end module comprises a photocell and a thermoelectric power generation module, the thermoelectric power generation module comprises a cold end and a hot end, after the cold end and the hot end have temperature difference, the thermoelectric power generation module generates electric energy, and the electric energy and the photocell supply power to a load of the far-end module. The problems that cooling of an existing merging unit has defects and the laser power supply efficiency is low are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of laser power supply, and particularly relates to a laser power supply system and method for a merging unit to a remote module. Background Art

[0002] Electronic current transformers are widely used in DC and AC current and voltage measurement systems of power systems. Their advantages are that there is no electrical connection between the high-potential remote module and the ground-potential merging unit, and the remote module is laser-powered by the merging unit. After setting the laser energy output parameters of the laser board in the merging unit, the laser of the laser board is sent, and the laser is transmitted to the photovoltaic cell of the remote module through the optical fiber transmission system, and the photovoltaic cell converts the laser energy into electrical energy.

[0003] After the laser emitted by the laser enters the optical fiber, it is transmitted in the optical fiber and finally reaches the photovoltaic cell end. Among them, the optical fiber can be laid and spliced according to a certain path, and the loss of the laser during transmission reaches about 40%. In the photovoltaic cell, part of the laser is converted into electrical energy and part is converted into heat energy. The optimal conversion efficiency of the photovoltaic cell is low, and the remaining light energy is lost in the form of heat. Improving the electrical energy conversion efficiency of the laser photovoltaic cell can increase the electrical energy margin at the load end, and also reduce the input electrical energy of the laser source to a certain extent, and improve the service life of the laser source.

[0004] When the laser works, the electro-optical efficiency is 45%, and heat is generated during operation. Good heat dissipation needs to be ensured during the operation of the laser, otherwise it will affect the service life of the laser. When the common merging unit uses air cooling, in order to prevent dust in the flowing air from entering the merging unit, a dust-proof cotton is set between the fan and the merging unit. When the dust-proof effect of the dust-proof cotton is good, the fan requires a large power. When the dust-proof effect is not good, dust is easy to enter the merging unit. Dust is extremely harmful to electronic devices, which not only affects the stability of electronic products, but also shortens the product life. After the static electricity of electronic products absorbs dust, it changes the impedance between circuits, affecting the function and life of the product.

[0005] In summary, the existing cooling method of the merging unit has drawbacks. The existing remote module uses a photovoltaic cell to only convert the laser into electrical energy, which is lost in the form of heat in the photovoltaic cell, and the laser power supply efficiency is low. Summary of the Invention

[0006] The purpose of the present invention is to provide a laser power supply system and method for a merging unit to a remote module, which solves the problems of the existing drawbacks in the cooling of the merging unit and the low laser power supply efficiency.

[0007] The present invention is realized through the following technical solutions: A laser power supply system for a merging unit to a remote module includes a merging unit and a remote module; the merging unit supplies laser power to the remote module through a laser transmission optical fiber; The merging unit integrates a CPU control module and a thermoelectric refrigeration unit. The thermoelectric refrigeration unit includes a thermoelectric refrigeration power supply module, a thermoelectric refrigeration drive circuit, and a thermoelectric refrigeration module connected in sequence. The thermoelectric refrigeration module includes a first cold end and a first hot end. The thermoelectric refrigeration drive circuit, the first cold end, and the first hot end form a loop; the first cold end is in close contact with the heating part. The CPU control module is connected to the thermoelectric refrigeration power supply module. The CPU control module is connected to both the first cold end and the first hot end, and is used to obtain the temperatures of the first cold end and the first hot end, and control the thermoelectric refrigeration drive circuit to refrigerate or heat. The remote module includes a photovoltaic cell and a thermoelectric power generation module. The thermoelectric power generation module includes a second cold end and a second hot end. The second hot end is arranged in contact with the heating part of the photovoltaic cell; after a temperature difference exists between the second cold end and the second hot end, the thermoelectric power generation module is used to generate electric energy, and the electric energy and the photovoltaic cell both supply power to the load of the remote module.

[0008] Furthermore, the merging unit further includes a laser power supply board. The laser power supply board includes a laser power supply module, a laser power supply drive circuit, and a laser connected in sequence; the CPU control module is connected to the laser power supply module.

[0009] Furthermore, the thermoelectric refrigeration module further includes a first electrode, a first device, a second electrode, a second device, and a third electrode. The positive pole of the thermoelectric refrigeration drive circuit is connected to the first electrode, and the negative pole is connected to the third electrode; the first electrode is arranged on the first device, the third electrode is arranged on the second device, and both the first device and the second device are connected to the second electrode. The first cold end of the thermoelectric refrigeration module is arranged in contact with the heating part of the laser, and the first hot end of the thermoelectric refrigeration module is connected to the first electrode and the third electrode to form an electrical loop.

[0010] Furthermore, the materials of the first device and the second device are selected to conform to the materials of the Peltier effect.

[0011] Furthermore, the remote module further includes an electric energy processing module. Both the photovoltaic cell and the thermoelectric power generation module are connected to the electric energy processing module.

[0012] Furthermore, the thermoelectric power generation module further includes an insulating heat conduction layer, a fourth electrode, a third device, a fourth device, a fifth electrode, and a sixth electrode; the insulating heat conduction layer serves as the second hot end. The insulating heat conduction layer is arranged on the fourth electrode. The fourth electrode connects the third device and the fourth device. The third device is arranged on the fifth electrode, the fourth device is arranged on the sixth electrode, and the second cold end is connected to the fifth electrode and the sixth electrode. The fifth electrode is connected to the positive pole of the electric energy processing module, and the sixth electrode is connected to the negative pole of the electric energy processing module.

[0013] Furthermore, the photovoltaic cell includes a photovoltaic cell encapsulation housing and a cathode of the photovoltaic cell disposed inside the photovoltaic cell encapsulation housing, and the thermoelectric power generation module is integrated inside or outside the photovoltaic cell encapsulation housing; When the thermoelectric power generation module is integrated inside the photovoltaic cell encapsulation housing, the insulating and heat-conducting layer is disposed below the cathode of the photovoltaic cell; When the thermoelectric power generation module is integrated outside the photovoltaic cell encapsulation housing, the insulating and heat-conducting layer is disposed on the outer wall of the photovoltaic cell encapsulation housing.

[0014] The present invention also discloses a control method for the laser power supply system of the merging unit to the remote module, including the following processes: After a temperature difference exists between the second cold end and the second hot end of the thermoelectric power generation module, the thermoelectric power generation module generates electric energy, and together with the photovoltaic cell, transfers the electric energy to the remote load; Meanwhile, the CPU control module acquires the temperatures of the first cold end and the first hot end in the electrothermal refrigeration module, and performs refrigeration or heating. Specifically: When the temperature of the first cold end is greater than the upper limit value of the preset cold end temperature, after the electrothermal refrigeration drive circuit provides electric energy, a refrigeration system is formed, and the temperature of the first cold end decreases until the temperature of the first cold end decreases to be less than the upper limit value of the preset cold end temperature and greater than the lower limit value of the preset cold end temperature, and the refrigeration process stops running; When the temperature of the first cold end is less than the lower limit value of the preset cold end temperature, the current of the electrothermal refrigeration drive circuit reverses, a heating system is formed, the functions of the first cold end and the first hot end are exchanged, and the exchanged first hot end starts to heat until the temperature of the first cold end is greater than the lower limit value of the preset cold end temperature and less than the upper limit value of the preset cold end temperature, and the heating process stops running.

[0015] Furthermore, during the refrigeration and heating processes, the temperature of the first hot end needs to be monitored simultaneously, and the operating temperature range of the first hot end temperature is the lower limit value of the preset hot end temperature and the upper limit value of the preset hot end temperature.

[0016] Furthermore, during the refrigeration process, if after refrigerating for a period of time, the temperature of the first cold end is still greater than the upper limit value of the preset cold end temperature and the temperature of the first hot end is greater than the upper limit value of the preset hot end temperature, then a refrigeration anomaly alarm is given and the refrigeration stops running; During the heating process, if after heating for a period of time, the temperature of the first cold end is still less than the lower limit value of the preset cold end temperature and the temperature of the first hot end is less than the lower limit value of the preset hot end temperature, then a heating anomaly alarm is given and the heating stops running.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention provides a laser power supply system for a merging unit to a remote module, and the effects are as follows: On the one hand, a CPU control module and a thermoelectric refrigeration unit are integrated in the merging unit. The thermoelectric refrigeration unit includes a thermoelectric refrigeration power supply module, a thermoelectric refrigeration drive circuit, and a thermoelectric refrigeration module connected in sequence. The thermoelectric refrigeration module includes a first cold end and a first hot end. The first cold end is disposed on the components that need to be cooled, or the first cold end is disposed at a position where there are no heat-generating components around and is insensitive to temperature. The thermoelectric refrigeration drive circuit, the first cold end, and the first hot end form a loop. The first cold end is in close contact with the heat-generating part to absorb heat, and the first hot end dissipates heat. When the ambient temperature is too low to be conducive to the operation of a certain component in the merging unit, the current of the thermoelectric refrigeration drive circuit reverses. The first cold end during refrigeration becomes the first hot end, and the first hot end during refrigeration becomes the first cold end. At this time, a heating system is formed to raise the working temperature to an optimal working temperature.

[0018] On the other hand, the present invention also integrates a thermoelectric power generation module in the remote module. The thermoelectric power generation module includes a second cold end and a second hot end. The second hot end is disposed in contact with the heat-generating part of the photovoltaic cell. After a temperature difference exists between the second cold end and the second hot end, the thermoelectric power generation module generates electric energy, and the electric energy and the photovoltaic cell together supply power to the load of the remote module, improving the electric energy conversion efficiency of laser power supply.

[0019] In summary, a laser power supply system for a remote module provided by the present invention can reduce the temperature of a certain component in the merging unit and improve the service life. There are no moving parts in the refrigeration of the merging unit, and no air flow is required, which can avoid the dust brought into the merging unit by air cooling. By using the temperature difference between the laser photovoltaic cell and the surrounding components, heat energy is converted into electric energy, thereby improving the electric energy conversion efficiency of laser power supply.

[0020] Further, the thermoelectric refrigeration module further includes a first electrode, a first device, a second electrode, a second device, and a third electrode, which form an electrical loop after being connected to the thermoelectric refrigeration drive circuit. The working temperature of the laser is controlled to extend the service life of the laser.

[0021] Further, the thermoelectric power generation module includes a cold end, a hot end, a third device, and a fourth device, as well as electrical lines and conductive components connecting the devices. This part constitutes a thermoelectric energy harvesting circuit based on the Seebeck effect. After a temperature difference exists between the cold end and the hot end, the thermoelectric power generation loop generates electric energy, and the electric energy and the photovoltaic cell together supply power to the load, improving the laser power supply energy conversion efficiency. The hot end is in close contact with the heat-generating part of the photovoltaic cell.

[0022] Multiple thermoelectric power generation loops can be set up and combined in series and parallel to achieve the working voltage and working current required by the load. Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the composition of the merging unit; Figure 2 Schematic block diagram of a laser board with electrothermal refrigeration; Figure 3 Schematic diagram of heat energy transfer between the electrothermal refrigeration module and the laser module; among them, figure (a) is the schematic diagram of heat energy transfer between the electrothermal refrigeration module and the laser module during refrigeration; figure (b) is the schematic diagram of heat energy transfer between the electrothermal refrigeration module and the laser module during heating; Figure 4 Control diagram of the electrothermal refrigeration module; Figure 5 Schematic diagram of the combination of the electrothermal refrigeration module and the laser; Among them, 1. Electrothermal refrigeration drive circuit; 2. First electrode; 3. Second electrode; 4. Laser package housing; 5. Third electrode; 6. First hot end; Figure 6 Schematic block diagram of a remote module with a thermoelectric power generation module; Figure 7 Schematic diagram of laser power supply energy transfer; Figure 8 Schematic diagram of the integration of the thermoelectric power generation module in the photovoltaic cell; Among them, 7. Photovoltaic cell package housing; 8. Photovoltaic cell anode; 9. Photovoltaic cell photoelectric conversion part; 10. Photovoltaic cell cathode; 11. Insulating heat-conducting layer; 12. Fourth electrode; 13. Second cold end; 14. Fifth electrode; 15. Sixth electrode; 16. First device; 17. Second device; 18. Third device; 19. Fourth device. Specific implementation manners

[0024] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the following further detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0025] The components described and shown in the accompanying drawings and embodiments of the present invention can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of the present invention provided in the following drawings is not intended to limit the scope of the claimed invention, but only represents a selected embodiment of the present invention. Based on the accompanying drawings and embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0026] It should be noted that: the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, element, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed.

[0027] First, a simple explanation of technical terms is given.

[0028] Laser power supply: The basic principle of laser power supply is to transmit laser from the ground potential side to the high potential through an energy supply optical fiber, and then convert the light energy into electrical energy by a photovoltaic cell.

[0029] Photovoltaic cell: It is a semiconductor component that generates electromotive force under light irradiation, directly converting light into electricity. There are many types of photovoltaic cells, commonly used ones include selenium photovoltaic cells, silicon photovoltaic cells, thallium sulfide and silver sulfide photovoltaic cells, etc.

[0030] Thermoelectric power generation: It is mainly based on the thermoelectric effect, which is the Seebeck effect.

[0031] Electrothermal refrigeration: The electrothermal effect, which is the Peltier effect.

[0032] The Peltier effect refers to the phenomenon that when an electric current passes through a loop composed of two different materials, heat absorption and heat release occur at the two joints. This phenomenon is reversible, that is, when the direction of the electric current is changed, the joints of heat absorption and heat release will also be interchanged.

[0033] The Seebeck effect refers to the fact that when two different materials of conductors or semiconductors are connected together and there is a temperature difference at their joints, an electric field will be generated inside the conductor, causing electrons to move from the high-temperature region to the low-temperature region, thereby generating a potential difference. This potential difference can form an electric current in the external circuit to achieve the generation of electrical energy. In the thermoelectric materials of the Seebeck effect, P-type semiconductors and N-type semiconductors have different carrier characteristics, similar to the P-type and N-type semiconductors in a PN junction.

[0034] The present invention provides a merging unit laser power supply system for a remote module, including a merging unit with electrothermal refrigeration, a laser transmission optical fiber, and a remote module with thermoelectric power generation. The merging unit with electrothermal refrigeration supplies laser power to the remote module with thermoelectric power generation through the laser transmission optical fiber.

[0035] As Figure 1 shown, the merging unit includes a motherboard, a display panel, a power board card, a CPU board card, an input / output board card, and a laser power supply board card. Multiple laser power supply board cards can be provided, and the laser power supply board cards are plugged into the motherboard to complete signal communication and power transmission with the motherboard.

[0036] The CPU board card is a circuit board integrated with a central processing unit (CPU) and related components.

[0037] As Figure 2As shown in the figure, the laser power supply board is provided with a CPU control module, a laser power supply module, a laser power supply drive circuit, and a laser. The laser power supply drive circuit provides continuous and stable electrical energy for the laser to emit laser light. After the laser obtains electrical energy, it generates laser light. The CPU control module realizes the regulation of the laser energy of the laser by controlling the laser power supply module and the laser power supply drive circuit.

[0038] As Figure 2 shown in the figure, the CPU control module is also connected to a thermoelectric refrigeration unit. The thermoelectric refrigeration unit includes a thermoelectric refrigeration power supply module, a thermoelectric refrigeration drive circuit 1, and a thermoelectric refrigeration module. The CPU control module controls the thermoelectric refrigeration module by controlling the thermoelectric refrigeration power supply module and the thermoelectric refrigeration drive circuit 1, and receives the lowest and highest temperature data of the thermoelectric refrigeration module, and controls the current of the thermoelectric refrigeration to realize the regulation of the thermoelectric refrigeration power.

[0039] As Figure 3 shown in the figure, the thermoelectric refrigeration module includes a first cold end and a first hot end 6, as well as electrical lines and conductive components connecting each device.

[0040] Taking the laser as a heat-generating component as an example for illustration, the heat transfer between the thermoelectric refrigeration module and the laser is as Figure 3 shown in Figure (a) below. This part forms a circuit based on the Peltier effect. The first cold end is closely attached to the heat-generating part of the laser, absorbs the heat on the laser, and the first hot end 6 dissipates the heat. After the thermoelectric refrigeration drive circuit 1 provides electrical energy, a refrigeration system is formed to achieve a cooling effect.

[0041] If the ambient temperature is too low to be conducive to the operation of the laser, the current of the thermoelectric refrigeration drive circuit 1 is reversed. At this time, a heating system is formed, as Figure 3 shown in Figure (b) below. The first cold end during refrigeration becomes the first hot end 6, and the first hot end 6 during refrigeration becomes the first cold end. At this time, by raising the operating temperature of the laser, the laser reaches an optimal operating temperature. The material of the first cold end and the number of thermoelectric refrigeration modules can be selected according to the specific structure of the laser to improve the refrigeration effect.

[0042] As Figure 4 shown in the figure, after the CPU control module receives the instruction to start the laser, it starts the laser power supply drive circuit to make the laser emit light; at the same time, the CPU control module obtains the temperatures of the first cold end and the first hot end 6 in the thermoelectric refrigeration module to perform refrigeration or heating. Specifically: When the first cold end absorbs the heat of the laser and the temperature of the first cold end is greater than the preset temperature upper limit value, after the thermoelectric refrigeration drive circuit 1 provides electrical energy, a refrigeration system is formed, and the temperature of the first cold end decreases until the temperature of the first cold end decreases to the preset temperature range. The preset temperature range is less than the preset temperature upper limit value and greater than the preset temperature lower limit value, and the refrigeration process stops running; When the cold-end temperature is lower than the preset lower temperature limit value, the current of the electrothermal refrigeration drive circuit 1 reverses to form a heating system, and the functions of the first cold end and the first hot end 6 are exchanged. After the exchange, the first hot end 6 starts to heat until the cold-end temperature is higher than the preset lower temperature limit value, and the heating process stops running; When the first cold-end temperature is between the preset lower temperature limit value and the preset upper temperature limit value, it indicates that the first cold-end temperature is within the preset temperature range, and the electrothermal refrigeration drive circuit 1 does not start, and no refrigeration or heating is performed.

[0043] In addition to cooling the laser, electrothermal refrigeration can also cool other temperature-sensitive electronic devices in the merging unit, such as the CPU and power supply module of the merging unit. In addition to being closely attached to the laser package housing 4, the electrothermal refrigeration module can also be made into a housing to replace the conventional package housing and package the light-emitting components of the laser. The electrothermal refrigeration module and the laser are deeply combined to form an integral whole.

[0044] As Figure 6 shown, the remote module includes an operational amplifier circuit, a filter circuit, an A / D conversion circuit, a data processing module, an output optical port, a photovoltaic cell, a power processing module, and a thermoelectric power generation module. The operational amplifier circuit, the filter circuit, the A / D conversion circuit, the data processing module, and the output optical port are connected in sequence. Both the thermoelectric power generation module and the photovoltaic cell are connected to the power processing module, and the power processing module supplies power to the A / D conversion circuit, the data processing module, and the output optical port.

[0045] The energy transmission of the thermoelectric power generation module and the photovoltaic cell is as Figure 7 shown. The thermoelectric power generation module includes a second cold end 13 and a second hot end, as well as electrical lines and conductive components connecting various devices. This part constitutes a thermoelectric energy harvesting circuit based on the Seebeck effect. After a temperature difference is generated between the second cold end 13 and the second hot end, electrical energy is generated in the thermoelectric power generation loop, and the electrical energy, together with the photovoltaic cell, supplies power to the load, improving the laser power supply energy conversion efficiency. Among them, the second hot end is closely attached to the heat-generating part of the photovoltaic cell.

[0046] More preferably, multiple thermoelectric power generation modules can be set up for series and parallel combinations to achieve the working voltage and working current required by the load.

[0047] As Figure 8 shown, the second hot end of the thermoelectric power generation module and the photoelectric conversion part of the photovoltaic cell are encapsulated together in the photovoltaic cell package housing 7, and the second cold end 13 is designed outside to become a new type of photovoltaic cell. Of course, the thermoelectric power generation module can also be set outside the photovoltaic cell package housing 7.

[0048] The features and performance of the present invention will be further described in detail below in conjunction with embodiments.

[0049] In the implementation of electrothermal refrigeration, as Figure 5 shown, the laser packaging housing 4 is made of insulating and heat-conducting material and serves as the first cold end of the electrothermal refrigeration module.

[0050] The positive pole of the electrothermal refrigeration driving circuit 1 is connected to the first electrode 2, and the negative pole is connected to the third electrode 5. The first electrode 2 is arranged on the first device 16, and the third electrode 5 is arranged on the second device 17. Both the first device 16 and the second device 17 are connected to the second electrode 3. The first hot end 6 connects the first electrode 2 and the third electrode 5. The electrothermal refrigeration driving circuit 1, the laser packaging housing 4, the first electrode 2, the first device 16, the second electrode 3, the second device 17, the third electrode 5, and the first hot end 6 are connected into a loop through wires.

[0051] The first electrode 2, the second electrode 3, and the third electrode 5 are used to connect the electrothermal refrigeration driving circuit 1, the first device 16, and the second device 17 into an electrical loop. The materials of the first device 16 and the second device 17 are selected to conform to the Peltier effect to ensure that the refrigeration system refrigerates when electric energy is provided. When the ambient temperature is too low for the laser to work, the current of the electrothermal refrigeration driving circuit 1 reverses, and at this time, a heating system is formed to raise the working temperature of the laser so that the laser reaches an optimal working temperature. The material of the first cold end and the number of refrigeration modules can be selected according to the specific structure of the laser to improve the refrigeration effect.

[0052] Specifically, the first device 16 is an N-type semiconductor, and the second device 17 is a P-type semiconductor.

[0053] Taking the example of setting the housing temperature of the laser during operation to be controlled between 20°C and 30°C, Figure 4 it is a control diagram of the electrothermal refrigeration module.

[0054] After receiving the instruction to start the laser, the CPU control module starts the laser driving circuit and simultaneously measures the temperatures of the first cold end and the first hot end 6. When the temperature of the first cold end is greater than 30°C, after the electrothermal refrigeration driving circuit 1 provides electric energy, a refrigeration system is formed, and the temperature of the first cold end decreases until the temperature of the cold end decreases to less than 30°C and greater than 20°C, and the refrigeration process stops running; When the temperature of the first cold end is less than 20°C, this is not the optimal working temperature of the laser, and the working temperature of the laser needs to be raised. At this time, the current of the electrothermal refrigeration driving circuit 1 reverses, a heating system is formed, the functions of the first cold end and the first hot end 6 are exchanged, and the exchanged first hot end 6 starts to heat until the temperature of the first cold end is greater than 20°C, and the heating process stops running; When the temperature of the first cold end is between 20 - 30°C, no refrigeration or heating is performed.

[0055] More preferably, during the refrigeration and heating processes, it is also necessary to monitor the temperature of the first hot end 6. Taking the preset temperature of the first hot end 6 as -45°C - 80°C as an example, the specific description is as follows: During the refrigeration process, if after refrigerating for a period of time, the temperature of the first cold end is still greater than 30°C and the first hot end 6 is greater than 80°C, it indicates abnormal refrigeration alarm, and the refrigeration stops running; During the heating process, if after heating for a period of time, the temperature of the first cold end is still less than 20°C and the first hot end 6 is less than -45°C, it indicates abnormal heating alarm, and the heating stops running.

[0056] Because during refrigeration, if the temperature of the cold end cannot drop, the temperature of the hot end will gradually increase, indicating a malfunction. Therefore, the temperature of the hot end is also monitored to prevent the hot end from rising without limit.

[0057] During heating, if the temperature of the cold end cannot rise, the temperature of the hot end will be too low, which will also cause adverse effects and is also considered a malfunction.

[0058] On the Figure 5 basis, transformations can also be made. If the laser packaging housing 4 is a conductive material, an insulating and heat-conducting cold end can be additionally set according to the overall application situation and attached to the laser heat component. The first cold end can also be integrated into the laser heating core to be more directly attached to the heating device.

[0059] The thermoelectric power generation module is integrated in the remote module as shown in Figure 6 .

[0060] As Figure 8 shown, in the photovoltaic cell packaging housing 7, there are a photovoltaic cell anode 8, a photovoltaic cell photoelectric conversion part 9, and a photovoltaic cell cathode 10; an insulating and heat-conducting layer 11 is provided below the photovoltaic cell cathode 10 to form a second hot end; a fourth electrode 12 is provided below the insulating and heat-conducting layer 11, and a third device 18 and a fourth device 19 are provided below the fourth electrode 12. The third device 18 and the fourth device 19 are arranged on the second cold end 13. The fourth electrode 12 is connected to the third device 18 and the fourth device 19. The third device 18 is arranged on the fifth electrode 14, and the fourth device 19 is arranged on the sixth electrode 15; the positive pole of the electric energy processing module is connected to the fifth electrode 14, and the negative pole is connected to the sixth electrode 15.

[0061] The insulating and heat-conducting layer 11 is provided as the second hot end on the fourth electrode 12, and the second cold end 13 is connected to the fifth electrode 14 and the sixth electrode 15. The insulating and heat-conducting layer 11, the fourth electrode 12, the third device 18, the fifth electrode 14, the second cold end 13, the sixth electrode 15 and the fourth device 19 form a thermoelectric energy harvesting circuit based on the Seebeck effect. After a temperature difference is generated between the second cold end 13 and the insulating and heat-conducting layer 11, electric energy is generated in the thermoelectric power generation loop and the electric energy is transmitted to the electric energy processing module. Among them, the insulating and heat-conducting layer 11 is closely attached to the heat-generating part of the photovoltaic cell.

[0062] Multiple thermoelectric power generation loops can be set up and combined in series and parallel to achieve the working voltage and working current required by the load. Specifically, there are multiple fourth electrodes 12, and each fourth electrode 12 is correspondingly provided with a set of third device 18 and fourth device 19, and each set of third device 18 and fourth device 19 is correspondingly connected to a set of fifth electrode 14 and sixth electrode 15.

[0063] Specifically, the third device 18 is an N-type semiconductor and the fourth device 19 is a P-type semiconductor.

[0064] Preferably, the insulating and heat-conducting layer 11 of the thermoelectric power generation module can also be integrated onto the outer wall of the photovoltaic cell package housing 7. Of course, the electric energy generated by the photovoltaic cell is also transmitted to the electric energy processing module to jointly provide power supply for the load operation.

[0065] Functions of the insulating and heat-conducting layer 11: It cannot lead the electric energy of the fourth electrode 12 to the thermoelectric power generation part; it leads the heat of the photovoltaic cell to the hot end, so that the second hot end has the same temperature as the high-temperature heat-generating part of the photovoltaic cell.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications or equivalent replacements can still be made to the specific implementation manners of the present invention, and any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the protection scope of the present invention.

Claims

1. A system for supplying power to a remote module laser by a merging unit, characterized in that: It includes a merging unit and a remote module; the merging unit supplies laser power to the remote module through a laser transmission optical fiber; The merging unit integrates a CPU control module and an electric heating and cooling unit, wherein the electric heating and cooling unit comprises an electric heating and cooling power supply module, an electric heating and cooling drive circuit (1) and an electric heating and cooling module which are connected in sequence; The electric heating and cooling module comprises a first cold end and a first hot end (6); the electric heating and cooling drive circuit (1), the first cold end and the first hot end (6) form a loop; the first cold end is tightly fitted to the heating part; The CPU control module is connected to the electric heating and cooling power supply module; The CPU control module is connected to both the first cold end and the first hot end (6) and is used to obtain the temperatures of the first cold end and the first hot end (6) and control the electric heating and cooling drive circuit (1) to cool or heat; The remote module comprises a photovoltaic cell and a temperature difference power generation module, wherein the temperature difference power generation module comprises a second cold end (13) and a second hot end, wherein the second hot end is arranged in contact with the heating part of the photovoltaic cell; after a temperature difference exists between the second cold end (13) and the second hot end, the temperature difference power generation module is used to generate electric energy, and both the electric energy and the photovoltaic cell are used to supply power to the remote module load.

2. According to claim 1, a system for supplying power to a remote module laser by a merging unit, characterized in that: The merging unit also includes a laser power supply board, which includes a laser power supply module, a laser power supply driving circuit and a laser connected in sequence; the CPU control module is connected to the laser power supply module.

3. A system for supplying laser power to remote modules from a merging unit according to claim 2, characterized in that: The electric heating and cooling module also includes a first electrode (2), a first device (16), a second electrode (3), a second device (17) and a third electrode (5); The positive electrode of the electric heating and cooling drive circuit (1) is connected to the first electrode (2), and the negative electrode is connected to the third electrode (5); the first electrode (2) is arranged on the first device (16), the third electrode (5) is arranged on the second device (17), and the first device (16) and the second device (17) are both connected to the second electrode (3); The first cold end of the electric heating and cooling module is arranged in contact with the heating part of the laser, and the first hot end (6) of the electric heating and cooling module is connected to the first electrode (2) and the third electrode (5) to form an electrical circuit.

4. A system for supplying laser power to remote modules from a merging unit according to claim 3, characterized in that: The materials of the first device (16) and the second device (17) are selected to be materials that conform to the Peltier effect.

5. According to claim 1, a system for supplying power to a remote module laser from a merging unit, characterized in that: The remote module also includes a power processing module; The photocell and the temperature difference discharge module are both connected to the electric energy processing module.

6. A system for supplying laser power to remote modules from a merging unit according to claim 5, characterized in that: The temperature difference power generation module further comprises an insulating heat-conducting layer (11), a fourth electrode (12), a third device (18), a fourth device (19), a fifth electrode (14), and a sixth electrode (15); the insulating heat-conducting layer (11) serves as a second hot end; The insulating heat-conducting layer (11) is arranged on the fourth electrode (12), the fourth electrode (12) is connected to the third device (18) and the fourth device (19), the third device (18) is arranged on the fifth electrode (14), the fourth device (19) is arranged on the sixth electrode (15), and the second cold end (13) is connected to the fifth electrode (14) and the sixth electrode (15); The fifth electrode (14) is connected to the positive electrode of the power processing module, and the sixth electrode (15) is connected to the negative electrode of the power processing module.

7. A system for supplying laser power to remote modules from a merging unit according to claim 6, characterized in that: The photovoltaic cell comprises a photovoltaic cell packaging shell (7) and a photovoltaic cell cathode (10) arranged inside the photovoltaic cell packaging shell (7), and the temperature difference power generation module is integrated inside or outside the photovoltaic cell packaging shell (7); When the temperature difference power generation module is integrated inside the photovoltaic cell packaging shell (7), the insulating heat conductive layer (11) is arranged below the photovoltaic cell cathode (10); When the temperature difference power generation module is integrated outside the photovoltaic cell packaging shell (7), the insulating heat conductive layer (11) is arranged on the outer wall of the photovoltaic cell packaging shell (7).

8. The control method of the merging unit to the remote module laser power supply system according to any one of claims 1 to 7, characterized in that: The process includes: After the second cold end (13) and the second hot end of the thermoelectric power generation module have a temperature difference, the thermoelectric power generation module generates electric energy, and transmits the electric energy to a remote load together with the photovoltaic cell; At the same time, the CPU control module obtains the temperature of the first cold end and the first hot end (6) in the electric heating and cooling module to perform cooling or heating, specifically: When the temperature of the first cold end is greater than the upper limit value of the preset cold end temperature, the electric heating and cooling driving circuit (1) provides electric energy to form a cooling system, and the temperature of the first cold end decreases until the temperature of the first cold end decreases to a value less than the upper limit value of the preset cold end temperature and greater than the lower limit value of the preset cold end temperature, and the cooling process stops running; When the temperature of the first cold end is less than the lower limit of the cold end preset temperature, the current of the electric heating and cooling drive circuit (1) is reversed to form a heating system, and the functions of the first cold end and the first hot end (6) are exchanged. After the exchange, the first hot end (6) starts to heat until the temperature of the first cold end is greater than the lower limit of the cold end preset temperature and less than the upper limit of the cold end preset temperature, at which point the heating process stops.

9. The control method of the merging unit to the remote module laser power supply system according to claim 8, characterized in that: During the cooling and heating process, the temperature of the first hot end (6) needs to be monitored at the same time. The operating temperature range of the temperature of the first hot end (6) is the lower limit value of the hot end preset temperature and the upper limit value of the hot end preset temperature.

10. The control method of the laser power supply system for remote modules provided by the merging unit according to claim 9 is characterized in that: During the refrigeration process, if after a period of refrigeration, the temperature of the first cold end is still greater than the upper limit of the cold end preset temperature and the temperature of the first hot end (6) is greater than the upper limit of the hot end preset temperature, a refrigeration abnormality alarm is issued and the refrigeration operation is stopped; During the heating process, if after a period of heating, the temperature of the first cold end is still less than the lower limit of the cold end preset temperature and the temperature of the first hot end (6) is less than the lower limit of the hot end preset temperature, a heating abnormality alarm is issued and the heating operation is stopped.

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