A lamp-pumped laser cooling water anti-freezing device

Abstract

The present application relates to a kind of lamp-pumped laser cooling water anti-freezing device, the anti-freezing device includes control circuit, water inlet, water outlet and drain, and the water inlet solenoid valve, constant temperature water tank, self-priming pump and three-position three-way solenoid valve connected in sequence;Water outlet, drain and constant temperature water tank form three-way;Control circuit is used to control the opening and closing of water inlet solenoid valve, constant temperature water tank, self-priming pump and three-position three-way solenoid valve;Constant temperature water tank is used to make water temperature stable in a certain range around set value;Water inlet solenoid valve is used to control the opening and closing of water inlet;Self-priming pump is used to provide power for water circulation;Three-position three-way solenoid valve is used to control the opening and closing of water outlet and drain;Water inlet and water outlet are used to be connected with laser and cooling water machine respectively through water pipe, to realize the continuous circulation of water in anti-freezing device, laser and cooling water machine to achieve the purpose of anti-freezing;Drain is used to discharge water in anti-freezing device, laser and cooling water machine.

Description

Technical Field

[0001] This invention relates to the field of automatic control technology, and in particular to a cooling water antifreeze device for lamp-pumped lasers. Background Technology

[0002] Current technology: The laser crystal and pump lamp inside the lamp-pumped laser are immersed in circulating cooling water, and the laser crystal and pump lamp are cooled by a chiller. Neither the chiller nor the laser has antifreeze measures.

[0003] The cold winter weather can cause the cooling water inside the laser to freeze, leading to breakage of the crystal and pump lamp. To avoid this, current field lidar experiments require a lidar cabin, which needs to be kept at a constant temperature with air conditioning and heating, placing high demands on resources. Maintaining this constant temperature requires a large amount of power, and in the event of a power outage, a typical UPS is insufficient to keep up with restoration. Therefore, manual monitoring is necessary. If the power outage is prolonged, manual drainage is required to prevent the cooling water from freezing inside the laser, which is time-consuming and labor-intensive. If the power outage occurs at night, the monitoring personnel are unaware and cannot address the issue promptly.

[0004] Defect: In sub-zero temperatures, if the laser does not work and the cooling water stops circulating, it will freeze, causing damage to the laser components.

[0005] The difficulties in solving this problem:

[0006] Challenge 1: Antifreeze cannot be used

[0007] Cooling water cannot be replaced with antifreeze because antifreeze is corrosive. In addition, the optical path itself is designed based on the characteristics of water, such as its transmittance. The chemical components in antifreeze will affect the optical path, causing a decrease in laser power.

[0008] Challenge 2: High cost of building a constant temperature room

[0009] Building a dedicated temperature-controlled room for lasers requires not only a large amount of money but also frequent maintenance.

[0010] Therefore, in order to solve the above problems, the present invention proposes a cooling water antifreeze device for lamp-pumped pulsed lasers. Summary of the Invention

[0011] The purpose of this invention is to prevent laser cooling water from freezing and to protect the internal components of the laser. To achieve the above objective, this invention is implemented through the following technical solution.

[0012] This invention proposes a cooling water antifreeze device for lamp-pumped lasers. The antifreeze device includes a control circuit, a water inlet, a water outlet, and a water drain, as well as a water inlet solenoid valve, a constant temperature water tank, a self-priming pump, and a three-position three-way solenoid valve connected in sequence.

[0013] The control circuit is used to control the opening and closing of the inlet solenoid valve, the constant temperature water tank, the self-priming pump, and the three-position three-way solenoid valve.

[0014] The constant temperature water tank is used to stabilize the water temperature within a certain range near the set value;

[0015] The inlet solenoid valve is used to control the opening and closing of the inlet.

[0016] The self-priming pump is used to provide power for water circulation;

[0017] The three-position three-way solenoid valve is used to control the opening and closing of the water outlet and the water drain.

[0018] The inlet and outlet are used to connect to the laser and the chiller respectively through water pipes, so as to realize the continuous circulation of water in the antifreeze device, the laser and the chiller to achieve the purpose of antifreeze.

[0019] The drain outlet is used to discharge water from the antifreeze device, laser, and chiller.

[0020] As an improvement to the above technical solution, the constant temperature water tank is equipped with a heating device and a temperature sensor;

[0021] The heating device is used to heat water;

[0022] The temperature sensor is used to measure water temperature.

[0023] As an improvement to the above technical solution, the control circuit includes: a wireless control module and a UPS power supply;

[0024] The UPS power supply is used to ensure that the antifreeze device can work for a period of time in the event of a power outage;

[0025] The wireless control module is used to control the operation or shutdown of the antifreeze device based on whether the laser is working; it is also used to detect the power of the UPS power supply in the event of a power outage, and control the operation or shutdown of the antifreeze device based on the detection result.

[0026] As an improvement to the above technical solution, the control circuit further includes: a temperature sensor module, a self-priming pump control module, a water inlet solenoid valve module, a three-position three-way solenoid valve module, and a heating module.

[0027] The temperature sensor module is used to control the temperature sensor to collect temperature and transmit the temperature data to the wireless control module; the wireless control module compares the received temperature data with the set temperature threshold, and then issues commands to the self-priming pump control module, the water inlet solenoid valve module, the three-position three-way solenoid valve module and / or the heating module, thereby realizing the operation or shutdown of the antifreeze device.

[0028] The water inlet solenoid valve module is used to control the water inlet solenoid valve according to the instructions issued by the wireless control module.

[0029] The self-priming pump control module is used to control the opening and closing of the self-priming pump according to the instructions issued by the wireless control module;

[0030] The three-position three-way solenoid valve module is used to control the three-position three-way solenoid valve according to the instructions issued by the wireless control module.

[0031] The heating module is used to control the heating device to turn on and off according to the instructions issued by the wireless control module.

[0032] As an improvement to the above technical solution, the control circuit further includes:

[0033] A manual start / stop switch is used to connect or disconnect the control circuit.

[0034] As one of the improvements to the above technical solution, such as Figure 2 The wireless control module shown controls the operation or shutdown of the antifreeze device based on whether the laser is working, specifically including:

[0035] When the laser is working, the antifreeze device stops working: it controls the inlet solenoid valve to close the inlet and the outlet solenoid valve to close the outlet.

[0036] When the laser stops working, the antifreeze device activates: it controls the inlet solenoid valve to open the inlet, controls the outlet solenoid valve to open the outlet, and activates the self-priming pump to circulate constant-temperature water between the antifreeze device, the laser, and the chiller; at the same time, it acquires temperature data and determines whether the temperature is lower than the set value; if the temperature is not lower than the set value, it shuts off the heating device; if the temperature is lower than the set value, it turns on the heating device.

[0037] As an improvement to the above technical solution, the wireless control module, in the event of a power outage, detects the power level of the UPS power supply and controls the operation or shutdown of the anti-freeze device based on the detection result, specifically including:

[0038] The power level of the UPS is detected to determine whether it is below a set threshold.

[0039] If the power is less than the set threshold, the temperature data is acquired and it is determined whether the temperature is less than the set value. If the temperature is less than the set value, the inlet and outlet are opened, and the self-priming pump is turned on to drain the water. After the drainage is completed, the self-priming pump is turned off. If the temperature is not less than the set value, the heating device is turned off.

[0040] If the power consumption is not less than the set threshold, temperature data is acquired, and it is determined whether the temperature is less than the set value. If the temperature is less than the set value, the heating device is turned on, the inlet and outlet water outlets are opened, and the self-priming pump is turned on to drive water to circulate between the laser and the chiller. If the temperature is not less than the set value, the heating device is turned off. The advantages of this invention compared to existing technologies are:

[0041] 1. The antifreeze device of the present invention is easy to install (only the inlet and outlet water ports need to be connected to use it), providing laser equipment safety protection for lidar systems working in extreme environments;

[0042] 2. By installing the antifreeze device of this invention, the purpose of preventing the laser cooling water from freezing can be achieved, while protecting the internal components of the laser. This effectively avoids the investment in building a constant temperature room, eliminates the need for manual supervision, and greatly reduces financial investment and resource waste. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the device connection during installation and use of the present invention;

[0044] Figure 2 A diagram showing the water circuit operation for normal laser function;

[0045] Figure 3 Diagram of waterway operation for stopping the laser;

[0046] Figure 4 This is a diagram showing the internal equipment connections of the antifreeze device of the present invention;

[0047] Figure 5 This is a simplified internal diagram of the constant temperature water tank of the present invention;

[0048] Figure 6 A simplified diagram of the control circuit of the device of the present invention;

[0049] Figure 7 This is a control flowchart for when the UPS power level is less than 10% during a power outage.

[0050] Figure 8 This is a control flowchart to ensure that the UPS power level is not less than 10% during a power outage. Detailed Implementation

[0051] The technical solutions provided by the present invention will be further illustrated below with reference to the embodiments.

[0052] This invention relates to a device for preventing the cooling water from freezing in a lamp-pumped laser.

[0053] like Figure 1 The diagram shown illustrates the connection between the antifreeze device of this invention and the laser and chiller; the devices are connected via water pipes (see Device Connection). Figure 1 During installation, the antifreeze device of the present invention has water pipes installed on both sides, and the two water pipes are respectively connected to the laser and the chiller;

[0054] like Figure 2 The diagram shows the water circuit operation of the laser during normal operation. When the laser is working normally, the antifreeze device stops working and the inlet and outlet water valves are closed. The laser sends heated hot water to the chiller, and the chiller sends cooled cold water to the laser.

[0055] like Figure 3 The diagram shows the water circuit operation when the laser stops working. When the laser stops working, the antifreeze device opens the inlet and outlet solenoid valves, and the internal self-priming pump starts working, driving the constant temperature water to circulate between the laser and the chiller: the constant temperature water from the laser and the chiller is sent to the antifreeze device, and the constant temperature water from the antifreeze device is sent to the laser and the chiller.

[0056] The "three positions" in a three-position three-way solenoid valve correspond to three different operating states:

[0057] 1. The device is not working when both the inlet and outlet are closed. Figure 2 );

[0058] 2. The outlet of this device is open, and the device performs circulating heating. Figure 3 );

[0059] 3. When the battery is low, the drain outlet opens and drains water automatically;

[0060] like Figure 4 The diagram shows the internal equipment connection of the antifreeze device of the present invention. The internal equipment of the antifreeze device of the present invention includes: an inlet solenoid valve, a constant temperature water tank, a self-priming pump, and a three-position three-way solenoid valve connected in sequence. When water enters the antifreeze device of the present invention, it is sent to the constant temperature water tank through the inlet solenoid valve, and then the water in the constant temperature water tank is transferred to the three-position three-way solenoid valve through the self-priming pump, and then the three-position three-way solenoid valve is used for water discharge or drainage.

[0061] like Figure 5 The diagram shown is a simplified internal view of the constant temperature water tank of the present invention. The constant temperature water tank of the antifreeze device of the present invention includes: heating devices installed on the upper sides and temperature sensors installed at the bottom.

[0062] The circuit control section includes a wireless control module, a temperature sensor module, a self-priming pump control module, an inlet solenoid valve module, a three-position three-way electronic valve module, and a manual start / stop switch (see the control circuit diagram for connection details). Figure 6 ).

[0063] Press the manual start / stop switch or operate the antifreeze device via wireless control. The control module will determine whether heating is needed based on temperature sensor data, stabilizing the water temperature in the constant temperature water tank near the set value. At the same time, it will control the solenoid valve to open the inlet and outlet water outlets, start the self-priming pump, and continuously circulate the water between the laser and the chiller, thereby achieving the purpose of antifreeze.

[0064] In the event of a power outage, the backup UPS power supply will ensure the anti-freeze device operates for 2 hours. During this period, the control module will continuously monitor the remaining power of the UPS. When the remaining power is less than 10%, the drainage program will be initiated to drain all the cooling water and ensure equipment safety.

[0065] In the event of a power outage, this invention designs two program control flowcharts, including a main program control and a water circulation subroutine control. For example... Figure 7 As shown is the main program flowchart; when there is a power outage, the UPS power level must be checked first. In this embodiment, the power threshold is set to 10%, that is, it is necessary to determine whether the UPS power level is less than 10%.

[0066] If the battery level is less than 10%, acquire temperature data and determine if the temperature is lower than the set value. If the temperature is lower than the set value, open the inlet and outlet, then turn on the self-priming pump to drain the water. After drainage, turn off the self-priming pump. If the temperature is not lower than the set value, turn off the heating device.

[0067] If the battery level is not less than 10%, then the water circulation subroutine will be executed, such as... Figure 8 As shown: acquire temperature data and determine whether the temperature is lower than the set value. If the temperature is lower than the set value, turn on the heating device, open the inlet and outlet, and turn on the self-priming pump to drive the constant temperature water to circulate between the laser and the chiller. If the temperature is not lower than the set value, turn off the heating device.

[0068] As can be seen from the above detailed description of the present invention, the antifreeze device of the present invention is easy to install and can achieve the purpose of preventing laser cooling water from freezing.

[0069] 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 it. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A cooling water antifreeze device for a lamp-pumped laser, characterized in that, The antifreeze device includes a control circuit, a water inlet, a water outlet, and a drain outlet, as well as a water inlet solenoid valve, a constant temperature water tank, a self-priming pump, and a three-position three-way solenoid valve connected in sequence; the water outlet, the drain outlet, and the constant temperature water tank form a three-way connection. The control circuit is used to control the opening and closing of the inlet solenoid valve, the constant temperature water tank, the self-priming pump, and the three-position three-way solenoid valve. The constant temperature water tank is used to stabilize the water temperature within a certain range near the set value; The water inlet solenoid valve is used to control the opening and closing of the water inlet; The self-priming pump is used to provide power for water circulation; The three-position three-way solenoid valve is used to control the opening and closing of the water outlet and the water drain. The inlet and outlet are used to connect to the laser and the chiller respectively through water pipes, so as to realize the continuous circulation of water in the antifreeze device, the laser and the chiller to achieve the purpose of antifreeze. The drain outlet is used to discharge water from the antifreeze device, laser, and chiller; The control circuit includes: a wireless control module and a UPS power supply; The UPS power supply is used to ensure that the antifreeze device can work for a period of time in the event of a power outage; The wireless control module is used to control the operation or stop of the antifreeze device based on whether the laser is working; to detect the power of the UPS power supply in the event of a power outage and control the operation or stop of the antifreeze device based on the power detection result; and to compare the water temperature measured by the sensor with the temperature threshold and control whether the heating device needs to heat the water based on the comparison result. The wireless control module controls the operation or shutdown of the antifreeze device based on whether the laser is working, specifically including: When the laser is working, the antifreeze device is controlled to stop working: the inlet solenoid valve is controlled to close the inlet, and the outlet solenoid valve is controlled to close the outlet. When the laser stops working, the antifreeze device is controlled to operate: the inlet solenoid valve is controlled to open the inlet, the outlet solenoid valve is controlled to open the outlet, and the self-priming pump is turned on, so that the constant temperature water circulates between the antifreeze device, the laser, and the chiller; at the same time, temperature data is acquired and it is determined whether the temperature is lower than the set value; if the temperature is not lower than the set value, the heating device is turned off; if the temperature is lower than the set value, the heating device is turned on.

2. The antifreeze device for cooling water in a lamp-pumped laser according to claim 1, characterized in that, The constant temperature water tank is equipped with a heating device and a temperature sensor. The heating device is used to heat water; The temperature sensor is used to measure water temperature.

3. The antifreeze device for cooling water in a lamp-pumped laser according to claim 1, characterized in that, The control circuit also includes: a temperature sensor module, a self-priming pump control module, a water inlet solenoid valve module, a three-position three-way solenoid valve module, and a heating module. The temperature sensor module is used to control the temperature sensor to collect temperature and transmit the temperature data to the wireless control module; The water inlet solenoid valve module is used to control the water inlet solenoid valve; The self-priming pump control module is used to control the opening and closing of the self-priming pump; The three-position three-way solenoid valve module is used to control the three-position three-way solenoid valve. The heating module is used to control the heating device to turn on and off.

4. The antifreeze device for cooling water in a lamp-pumped laser according to claim 1, characterized in that, The control circuit also includes: A manual start / stop switch is used to connect or disconnect the control circuit.

5. The antifreeze device for cooling water in a lamp-pumped laser according to claim 1, characterized in that, The wireless control module, in the event of a power outage, detects the power level of the UPS power supply and controls the operation or shutdown of the anti-freeze device based on the power level detection result, specifically including: The power level of the UPS is detected to determine whether it is below a set threshold. If the power is less than the set threshold, the temperature data is acquired and it is determined whether the temperature is less than the set value. If the temperature is less than the set value, the inlet and outlet are opened, and the self-priming pump is turned on to drain the water. After the drainage is completed, the self-priming pump is turned off and the antifreeze device stops working. If the temperature is not less than the set value, the heating device is turned off. If the power is not less than the set threshold, the temperature data is acquired and it is determined whether the temperature is less than the set value. If the temperature is less than the set value, the heating device is turned on, the inlet and outlet are opened, and the self-priming pump is turned on to drive the water to circulate between the laser and the chiller. If the temperature is not less than the set value, the heating device is turned off.

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