A louver control system and heat dissipation control method for a box-type diesel generator set

Abstract

The present application relates to the technical field of diesel generator set louver control, and particularly relates to a box type diesel generator set louver control system and a heat dissipation control method, wherein a temperature detection unit is arranged to monitor the environmental temperature inside the container in real time, a main control unit outputs a control instruction according to the operating state of the diesel generator set and a temperature signal, and a signal triggering unit controls a first louver control unit, a second louver control unit and a heat dissipation fan control unit, so that independent control of the inlet and exhaust louvers and the heat dissipation louver is realized, the inlet and exhaust louvers are linked with the start and stop of the generator set, and the heat dissipation louver and the heat dissipation fan are controlled automatically according to the temperature; after the generator set is stopped, the heat dissipation louver can be automatically opened according to the temperature inside the container, and the heat dissipation fan is forced to conduct convection heat dissipation, so that the problem of residual heat accumulation after the generator set is stopped is effectively solved.

Description

Technical Field

[0001] This invention relates to the field of diesel generator set louver control technology, and particularly to a box-type diesel generator set louver control system and heat dissipation control method. Background Technology

[0002] With the continuous development of industry, diesel generator sets are widely used in various industries such as hospitals, coal mines, real estate, and construction sites. For some special application sites, the generator sets need to be placed outdoors, so they need to be installed in rainproof outdoor containers. To ensure heat dissipation of the equipment inside the container, louvered air inlets and outlets for ventilation need to be installed on the container.

[0003] Currently, the containerized diesel generator sets commonly used in data centers are all equipped with motorized louvers as a ventilation, heat dissipation, and protection structure for the cabin. The traditional control logic is a start-stop linkage control: when the diesel generator set starts running, the control system synchronously triggers the opening of the intake and exhaust motorized louvers, opening the ventilation channel between the container cabin and the outside world, relying on natural ventilation to meet the heat dissipation needs during the operation of the unit; when the unit stops, the control system immediately controls the motorized louvers to close, and the container cabin forms a fully enclosed structure to achieve a sealing and protection effect against dust, water, and debris.

[0004] However, after prolonged operation under load, diesel generator sets accumulate a significant amount of residual heat in the engine block, internal equipment, and air. When the unit shuts down, the control system immediately closes the electric louvers, instantly sealing the container. This prevents the residual heat from dissipating quickly through air convection, causing prolonged heat retention and persistently high temperatures inside the container. Especially in high outdoor temperatures and direct sunlight, the sealed container can create a greenhouse effect, allowing external heat to continuously enter and further exacerbating the temperature rise. Prolonged exposure to high temperatures not only leads to performance degradation and parameter drift in mechanical and electrical components, but can also cause severe malfunctions such as short circuits, component burnout, and inability to start the unit, significantly reducing the environmental adaptability and operational reliability of containerized diesel generator sets. Summary of the Invention

[0005] The technical problem to be solved by this invention is: how to automatically control the opening of the heat dissipation louvers and the operation of the heat dissipation fan according to the temperature inside the container after the unit is shut down, so as to quickly remove the residual heat inside the container and thus protect the safety of the equipment.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A louver control system for a box-type diesel generator set includes a temperature detection unit, a main control unit, a signal triggering unit, a first louver control unit, a second louver control unit, and a cooling fan control unit. The signal triggering unit is connected to the main control unit, the second louver control unit, and the cooling fan control unit, respectively. The main control unit is connected to the temperature detection unit and the first louver control unit, respectively. The first louver control unit is used to control the operation of the air inlet and outlet louvers; The second louver control unit is used to control the operation of the heat dissipation louvers according to the trigger signal output by the signal trigger unit; The cooling fan control unit is used to control the operation of the cooling fan according to the trigger signal output by the signal triggering unit.

[0007] Another technical solution adopted in this invention is: A heat dissipation control method based on the above-mentioned louver control system for a box-type diesel generator set includes the following steps: S1. The main control unit acquires the operating status of the diesel generator set inside the container and the ambient temperature inside the container detected by the temperature detection unit. S2. When the operating state is the start state, the main control unit sends an opening command to the first louver control unit, and the first louver control unit controls the air inlet and outlet louvers to open according to the opening command. S3. When the operating state is the shutdown state, the main control unit sends a closing command to the first louver control unit, and the first louver control unit controls the air inlet and outlet louvers to close according to the closing command; the main control unit performs heat dissipation control operation according to the ambient temperature. The heat dissipation control operation includes: When the ambient temperature is greater than the first preset temperature threshold, the main control unit sends a start command to the second louver control unit and the cooling fan control unit simultaneously through the signal triggering unit. The second louver control unit controls the cooling louver to open according to the start command, and the cooling fan control unit controls the cooling fan to start after a first preset time delay according to the start command. When the ambient temperature is lower than the second preset temperature threshold, the main control unit sends a stop command to both the second louver control unit and the cooling fan control unit through the signal triggering unit. The cooling fan control unit controls the cooling fan to stop according to the stop command, and the second louver control unit controls the cooling louvers to close after a second preset time delay according to the stop command.

[0008] The beneficial effects of this invention are as follows: This solution uses a temperature detection unit to monitor the ambient temperature inside the container in real time. The main control unit outputs control commands based on the operating status of the diesel generator set and the temperature signal. The signal triggering unit controls the first louver control unit, the second louver control unit, and the cooling fan control unit, respectively. This achieves independent control of the air intake and exhaust louvers and the cooling louvers. The air intake and exhaust louvers are linked to the generator set's start and stop, while the cooling louvers and cooling fans are autonomously controlled based on the temperature. After the generator set stops, the cooling louvers can automatically open according to the temperature inside the container, working in conjunction with the cooling fan for forced convection cooling. This effectively solves the problem of residual heat accumulation after shutdown, thus enabling automatic control of the opening of the cooling louvers and the operation of the cooling fan based on the temperature inside the container after the generator set stops, quickly dissipating residual heat from the container and protecting the equipment. Attached Figure Description

[0009] Figure 1 This is a connection block diagram of the louver control system for the box-type diesel generator set of the present invention; Figure 2 This is a schematic diagram of the louver control system for the box-type diesel generator set of the present invention. Figure 3 This is a flowchart of the heat dissipation control method of the present invention; Label Explanation: 1. Temperature detection unit; 101. Platinum resistance thermometer; 2. Main control unit; 201. Unit controller; 3. Signal triggering unit; 4. First louver control unit; 401. First motor; 5. Second louver control unit; 501. Second motor; 6. Cooling fan control unit; 7. Inlet and outlet louvers; 8. Cooling louvers; 9. Cooling fan. Detailed Implementation

[0010] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0011] Please refer to Figure 1 A louver control system for a box-type diesel generator set includes a temperature detection unit 1, a main control unit 2, a signal triggering unit 3, a first louver control unit 4, a second louver control unit 5, and a cooling fan control unit 6. The signal triggering unit 3 is connected to the main control unit 2, the second louver control unit 5, and the cooling fan control unit 6, respectively. The main control unit 2 is connected to the temperature detection unit 1 and the first louver control unit 4, respectively. The first louver control unit 4 is used to control the operation of the air inlet and outlet louvers 7; The second louver control unit 5 is used to control the operation of the heat dissipation louver 8 according to the trigger signal output by the signal trigger unit 3; The cooling fan control unit 6 is used to control the operation of the cooling fan 9 according to the trigger signal output by the signal triggering unit 3.

[0012] As can be seen from the above description, the beneficial effects of the present invention are as follows: This solution uses a temperature detection unit 1 to monitor the ambient temperature inside the container in real time. The main control unit 2 outputs control commands based on the operating status of the diesel generator set and the temperature signal. The signal triggering unit 3 controls the first louver control unit 4, the second louver control unit 5, and the cooling fan control unit 6, respectively, realizing independent control of the air intake and exhaust louvers 7 and the cooling louvers 8. The air intake and exhaust louvers 7 are linked to the start and stop of the generator set, while the cooling louvers 8 and the cooling fan 9 are autonomously controlled according to the temperature. After the generator set stops, the cooling louvers 8 can automatically open according to the temperature inside the container, and work with the cooling fan 9 to force convection cooling, effectively solving the problem of residual heat accumulation after shutdown. Thus, it realizes the automatic control of the opening of the cooling louvers 8 and the operation of the cooling fan 9 according to the temperature inside the container after the generator set stops, so as to quickly remove the residual heat inside the container and protect the equipment safety.

[0013] Furthermore, the signal triggering unit 3 includes a relay K1, the coil of which is connected to the main control unit 2, one normally open contact of which is connected to the second louver control unit 5, and the other normally open contact of which is connected to the cooling fan control unit 6.

[0014] As can be seen from the above description, by setting relay K1 as the core component of signal triggering unit 3, two branches, the second louver control unit 5 and the cooling fan control unit 6, can be controlled simultaneously by one relay. The circuit structure is simple and reliable, low in cost, and easy to upgrade based on the existing control system.

[0015] For further details, please refer to Figure 2 The first louver control unit 4 includes a relay K4 and a first motor 401. The coil of the relay K4 is connected to the main control unit 2, and the normally open contact of the relay K4 is connected to the air inlet and outlet louvers 7 through the first motor 401.

[0016] As can be seen from the above description, by setting up the first louver control unit 4 composed of relay K4 and the first motor 401, the linkage control between the air inlet and exhaust louvers 7 and the start and stop of the unit is realized. When the unit starts, the air inlet and exhaust louvers 7 automatically open to ensure air intake and cooling requirements, and when the unit stops, they automatically close to achieve sealing protection. The control unit has a simple structure, responds quickly, and can reliably complete the opening and closing actions of the air inlet and exhaust louvers 7.

[0017] For further details, please refer to Figure 2The second louver control unit 5 includes a relay KT2, a relay K3, and a second motor 501. The coil of the relay KT2 is connected to the signal triggering unit 3, the normally open contact of the relay KT2 is connected to the coil of the relay K3, and the normally open contact of the relay K3 is connected to the heat dissipation louver 8.

[0018] As can be seen from the above description, by setting up the second louver control unit 5, which consists of relay KT2, relay K3, and the second motor 501, independent temperature control of the heat dissipation louver 8 is achieved. When the temperature is higher than the set value, the heat dissipation louver 8 automatically opens to form a heat dissipation channel. When the temperature drops below the safe value, the heat dissipation louver 8 automatically closes to restore the sealing protection. This control unit is independent of the air inlet and outlet louver 7 control unit and can act autonomously according to the temperature, without being limited by the start-up and shutdown status of the unit.

[0019] For further details, please refer to Figure 2 The relay KT2 is a time-delay relay.

[0020] As described above, by setting relay KT2 as a time-delay relay, the function of delaying the closing of the heat dissipation louvers 8 after the heat dissipation fan 9 stops is achieved. When the temperature drops below the safe threshold, the heat dissipation fan 9 stops running first, and the heat dissipation louvers 8 close after a certain delay, ensuring that the residual heat inside the container is fully discharged before restoring the sealed state, thus avoiding the failure of residual heat to dissipate fully due to the louvers closing too early.

[0021] For further details, please refer to Figure 2 The cooling fan control unit 6 includes a relay KT1 and a contactor KM1. The coil of the relay KT1 is connected to the signal triggering unit 3, the normally open contact of the relay KT1 is connected to the coil of the contactor KM1, and the normally open contact of the contactor KM1 is connected to the cooling fan 9.

[0022] As can be seen from the above description, by setting up a cooling fan control unit 6 composed of relay KT1 and contactor KM1, the delayed start control of the cooling fan 9 is realized; when the temperature is higher than the set value, the cooling louvers 8 open first to form a ventilation channel, and the cooling fan 9 starts running with a delay, avoiding the fan from running ineffectively when the louvers are not open, and at the same time reducing the current surge when the fan starts, thus extending the service life of the equipment.

[0023] For further details, please refer to Figure 2 The relay KT1 is a time-delay relay.

[0024] As can be seen from the above description, by setting relay KT1 as a time-delay relay, the timing control of the delayed start of the cooling fan 9 after the louvers are opened is realized. This delay function ensures the correct heat dissipation sequence of "louvers open first, fan turns later", so that the heat dissipation channel is established first, and effective forced convection heat dissipation can be formed after the fan starts, thus improving the heat dissipation efficiency.

[0025] For further details, please refer to Figure 2 The cooling fan control unit 6 also includes a thermal relay FR1, the coil of which is connected in series between the normally open contact of the contactor KM1 and the cooling fan 9.

[0026] As can be seen from the above description, by setting a thermal relay FR1 in the cooling fan control unit 6, the overload protection function of the cooling fan 9 is realized; when the cooling fan 9 experiences abnormal conditions such as overcurrent or overload during operation, the thermal relay FR1 will cut off the power supply to the fan, effectively protecting the cooling fan 9 from damage and improving the safety and reliability of the entire control device.

[0027] For further details, please refer to Figure 2 The temperature detection unit 1 includes a platinum resistance thermometer 101. One end of the platinum resistance thermometer 101 is connected to the analog signal input terminal of the main control unit 2, and the other end of the platinum resistance thermometer 101 is connected to the common analog signal terminal of the main control unit 2.

[0028] As can be seen from the above description, by using platinum resistance thermometer 101 as a temperature sensing element, high-precision measurement of the internal ambient temperature of the container is achieved. Platinum resistance thermometer 101 has the characteristics of high measurement accuracy, good stability and excellent linearity, and can provide accurate and reliable temperature data to the main control unit 2, ensuring the accuracy of heat dissipation control.

[0029] Please refer to Figure 3 A heat dissipation control method based on the above-mentioned louver control system for a box-type diesel generator set includes the following steps: S1. The main control unit 2 acquires the operating status of the diesel generator set inside the container and the ambient temperature inside the container detected by the temperature detection unit 1. S2. When the operating state is the start state, the main control unit 2 sends an opening command to the first louver control unit 4, and the first louver control unit 4 controls the air inlet and outlet louvers 7 to open according to the opening command. S3. When the operating state is the shutdown state, the main control unit 2 sends a closing command to the first louver control unit 4, and the first louver control unit 4 controls the air inlet and outlet louvers 7 to close according to the closing command; the main control unit 2 performs heat dissipation control operation according to the ambient temperature. The heat dissipation control operation includes: When the ambient temperature is greater than the first preset temperature threshold, the main control unit 2 sends a start command to the second louver control unit 5 and the cooling fan control unit 6 simultaneously through the signal triggering unit 3. The second louver control unit 5 controls the cooling louver 8 to open according to the start command, and the cooling fan control unit 6 controls the cooling fan 9 to start after a first preset time delay according to the start command. When the ambient temperature is lower than the second preset temperature threshold, the main control unit 2 sends a stop command to the second louver control unit 5 and the cooling fan control unit 6 simultaneously through the signal triggering unit 3. The cooling fan control unit 6 controls the cooling fan 9 to stop according to the stop command, and the second louver control unit 5 controls the cooling louver 8 to close after a second preset time delay according to the stop command.

[0030] As can be seen from the above description, the beneficial effects of the present invention are as follows: This scheme first involves the main control unit 2 acquiring the operating status of the diesel engine inside the container and the ambient temperature inside the container detected by the temperature detection unit 1. When the operating status is "start," the main control unit 2 sends an opening command to the first louver control unit 4, controlling the air intake and exhaust louvers 7 to open to meet the air intake and cooling requirements of the unit during operation. When the operating status is "stop," the main control unit 2 sends a closing command to the first louver control unit 4, controlling the air intake and exhaust louvers 7 to close for sealing and protection. Simultaneously, the main control unit 2 performs heat dissipation control operations based on the ambient temperature. In this heat dissipation control operation, when the ambient temperature exceeds a first preset temperature threshold, the main control unit 2 triggers a signal through the unit... Simultaneously, the main control unit 2 sends start commands to the second louver control unit 5 and the cooling fan control unit 6. The second louver control unit 5 then controls the cooling louvers 8 to open, forming a heat dissipation channel. The cooling fan control unit 6, after a first preset time delay, controls the cooling fan 9 to start for forced convection cooling. When the ambient temperature is lower than a second preset temperature threshold, the main control unit 2 sends stop commands to both the second louver control unit 5 and the cooling fan control unit 6 simultaneously via the signal trigger unit 3. The cooling fan control unit 6 then controls the cooling fan 9 to stop immediately. The second louver control unit 5, after a second preset time delay, controls the cooling louvers 8 to close, restoring full airtight protection. This control method features clear logic and precise timing. Through the optimized timing of "louvers open first, fan turns later; fan stops first, louvers close later," it ensures heat dissipation efficiency and equipment safety, achieving fully automatic intelligent control of shutdown cooling.

[0031] Please refer to Figure 1 and Figure 2 As shown, Embodiment 1 of the present invention is as follows: Please refer to Figure 1A louver control system for a box-type diesel generator set includes a temperature detection unit 1, a main control unit 2, a signal triggering unit 3, a first louver control unit 4, a second louver control unit 5, and a cooling fan control unit 6. The signal triggering unit 3 is connected to the main control unit 2, the second louver control unit 5, and the cooling fan control unit 6, respectively. The main control unit 2 is connected to the temperature detection unit 1 and the first louver control unit 4, respectively. The first louver control unit 4 is used to control the operation of the air inlet and outlet louvers 7; The second louver control unit 5 is used to control the operation of the heat dissipation louver 8 according to the trigger signal output by the signal trigger unit 3; The cooling fan control unit 6 is used to control the operation of the cooling fan 9 according to the trigger signal output by the signal trigger unit 3. The rated voltage of the cooling fan 9 is AC380V, the rated speed is 1500r / min, and the number of magnetic poles is 4P.

[0032] Please refer to Figure 2 The signal triggering unit 3 includes a relay K1 (model CR-M024DC4L). The coil of the relay K1 is connected to the main control unit 2. One normally open contact of the relay K1 is connected to the second louver control unit 5, and the other normally open contact of the relay K1 is connected to the cooling fan control unit 6.

[0033] The first louver control unit 4 includes a relay K4 (model CR-M024DC4L) and a first motor 401. The rated voltage of the first motor 401 is DC24V, and it can run in both clockwise (i.e., forward rotation) and counterclockwise (i.e., reverse rotation) directions. It adopts a two-wire wiring method. The coil of the relay K4 is connected to the main control unit 2, and the normally open contact of the relay K4 is connected to the air inlet and outlet louvers 7 through the first motor 401.

[0034] The second louver control unit 5 includes relay KT2, relay K3 (model CR-M024DC4L) and a second motor 501. The rated voltage of the second motor 501 is DC24V, and it can run in both clockwise (i.e., forward rotation) and counterclockwise (i.e., reverse rotation) directions. It adopts a two-wire wiring method. The coil of relay KT2 is connected to the signal trigger unit 3, the normally open contact of relay KT2 is connected to the coil of relay K3, and the normally open contact of relay K3 is connected to the heat dissipation louver 8.

[0035] The relay KT2 is a time-delay relay with an adjustable time of 0s to 30s and uses a DC24V coil.

[0036] The cooling fan control unit 6 includes a relay KT1 and a contactor KM1 (model AF26-30-10-11). The coil of the relay KT1 is connected to the signal triggering unit 3, the normally open contact of the relay KT1 is connected to the coil of the contactor KM1, and the normally open contact of the contactor KM1 is connected to the cooling fan 9.

[0037] The relay KT1 is a time-delay relay with an adjustable time of 0s to 30s and uses a DC24V coil.

[0038] The cooling fan control unit 6 also includes a thermal relay FR1 (model TF42-10), the coil of which is connected in series between the normally open contact of the contactor KM1 and the cooling fan 9.

[0039] The temperature detection unit 1 includes a platinum resistance thermometer 101 (i.e., a PT100 temperature sensor). One end of the platinum resistance thermometer 101 is connected to the analog signal input terminal of the main control unit 2, and the other end of the platinum resistance thermometer 101 is connected to the common analog signal terminal of the main control unit 2.

[0040] The main control unit 2 includes a unit controller 201, which is model IL4-AMF25.

[0041] The working principle of the above-mentioned box-type diesel generator set louver control system is as follows: I. Control process of air inlet and exhaust louvers 7: When the diesel generator set inside the container starts, after the generator set controller 201 detects the start command, the control output terminal of the generator set controller 201 outputs a DC24V control voltage to the coil of relay K4. The coil of relay K4 is energized, and its normally open contact closes, supplying DC24V power to the first motor 401. The first motor 401 rotates in the forward direction, driving the air intake and exhaust louvers 7 to open, ensuring the air intake and cooling requirements required for normal operation of the generator set.

[0042] When the unit controller 201 detects a shutdown signal, it cuts off the DC24V voltage output to the coil of relay K4, de-energizing the coil and opening its normally open contacts. Simultaneously, due to a delay logic set in the internal program of the unit controller 201, it delays for 30 seconds after detecting the shutdown signal before outputting a reverse command to the first motor 401, causing it to rotate in reverse and close the air intake and exhaust louvers 7. This 30-second delay allows some of the unit's heat to dissipate naturally through the air intake and exhaust louvers 7 after shutdown, preventing an immediate heat buildup caused by closing the louvers immediately after shutdown.

[0043] II. Temperature Detection and Signal Triggering Process: During the unit shutdown process, the unit controller 201 continuously receives the resistance signal fed back by the platinum resistance thermometer 101 inside the container through its analog signal input terminal, and calculates the actual ambient temperature inside the container based on the resistance signal; the unit controller 201 compares the detected temperature value with the preset internal temperature thresholds (the first preset temperature threshold is 35℃, and the second preset temperature threshold is 25℃) in real time.

[0044] When the ambient temperature detected by the unit controller 201 exceeds 35℃, the control output terminal of the unit controller 201 outputs a DC24V control voltage to the coil of relay K1. The coil of relay K1 is energized, and its two normally open contacts close simultaneously. One normally open contact of relay K1 supplies DC24V power to the coil of relay KT2, and the other normally open contact supplies DC24V power to the coil of relay KT1. Thus, the signal triggering unit 3 completes the signal conversion and trigger output function for the "temperature exceeds the threshold" condition.

[0045] When the ambient temperature detected by the unit controller 201 is less than 25°C, the coil of the control relay K1 of the unit controller 201 outputs a DC24V voltage, de-energizing the coil of relay K1 and simultaneously opening its two normally open contacts. At this point, the signal triggering unit 3 has completed the signal reset and de-triggering function for the "temperature below threshold" condition.

[0046] III. Control process of heat dissipation louvers 8: When the ambient temperature exceeds 35℃, after one normally open contact of relay K1 closes, DC24V power is supplied to the coil ends of relay KT2 via the first normally open contact of relay K1, energizing the coil of relay KT2. Since relay KT2 is an energized-and-operate relay, its normally open contact closes immediately after its coil is energized. After the normally open contact of relay KT2 closes, DC24V power is supplied to the coil ends of relay K3 via this normally open contact, energizing the coil of relay K3. Its normally open contact closes, supplying DC24V power to the second motor 501. The second motor 501 rotates in the forward direction, driving the heat dissipation louvers 8 to open, forming a heat dissipation and ventilation channel between the container and the outside world.

[0047] When the ambient temperature drops below 25°C, the two normally open contacts of relay K1 open, and the coil of relay KT2 is de-energized. Since relay KT2 is a time-delay relay, its normally open contacts do not open immediately after the coil is de-energized, but rather after a certain delay (set to 10 seconds in this embodiment). During this 10-second delay, the coil of relay K3 remains energized, the second motor 501 continues to operate in the forward direction, and the heat dissipation louvers 8 remain open. When the 10-second delay of relay KT2 ends, its normally open contacts open, the coil of relay K3 is de-energized, and its normally open contacts open, cutting off the DC24V power supply. Simultaneously, the unit controller 201 outputs a reverse command to the second motor 501, causing the second motor 501 to operate in reverse, driving the heat dissipation louvers 8 to close, restoring the container to its fully sealed protective state.

[0048] The delayed shutdown function of relay KT2 ensures the following timing: when the ambient temperature drops below 25°C, the cooling fan 9 immediately stops operating (see the description of the control process of cooling fan 9 below), while the cooling louvers 8 remain open for 10 seconds, allowing the residual heat inside the container to continue to dissipate naturally during these 10 seconds. The cooling louvers 8 are only closed after the residual heat has been fully dissipated, avoiding the residual heat being trapped inside the container due to the louvers closing too early.

[0049] IV. Control process of cooling fan 9: When the ambient temperature exceeds 35℃, after the other normally open contact of relay K1 closes, DC24V power is supplied to the coil terminals of relay KT1 via the other normally open contact of relay K1, energizing the coil of relay KT1. Since relay KT1 is a time-delay relay, its normally open contact does not close immediately after the coil is energized, but rather closes after a certain delay (set to 10 seconds in this embodiment). During this 10-second delay, the heat dissipation louvers 8 have already opened (see the description of the heat dissipation louver 8 control process above). When the 10-second delay of relay KT1 ends, its normally open contact closes, and DC24V power is supplied to the coil ends of contactor KM1 through the normally open contact. The coil of contactor KM1 is energized, and its main circuit normally open contact closes, supplying AC600V main circuit power to the cooling fan 9 through the coil of thermal relay FR1. The cooling fan 9 is energized and starts running. At this time, the cooling louvers 8 are already fully open. After the cooling fan 9 starts, an effective forced convection cooling path is immediately formed. Cold air from the outside enters the container through the cooling louvers 8, exchanges heat with the hot air inside the container, and is then forcibly exhausted outside the container by the cooling fan 9, achieving efficient heat dissipation.

[0050] The delayed closing function of relay KT1 ensures the correct heat dissipation sequence of "heat dissipation louvers 8 opening first and heat dissipation fan 9 starting later", avoiding the idling operation of heat dissipation fan 9 before the louvers are opened. This not only improves heat dissipation efficiency, but also prevents energy waste and equipment damage caused by ineffective fan operation.

[0051] When the ambient temperature drops below 25℃, the two normally open contacts of relay K1 open, and the coil of relay KT1 is de-energized. Since relay KT1 is a time-delay type relay, its normally open contacts open immediately after its coil is de-energized. The coil of contactor KM1 is also de-energized, and its main circuit normally open contacts open, cutting off the AC600V main circuit power supply to the cooling fan 9, causing the cooling fan 9 to stop operating immediately. At this time, relay KT2 is in its 10-second delay period (see the description of the control process of the cooling louvers 8 above). The cooling louvers 8 remain open, and residual heat inside the container can continue to dissipate naturally through the louvers. After the 10-second delay ends, the cooling louvers 8 close, and the entire cooling process ends.

[0052] V. Overload protection for cooling fan 9: During the operation of the cooling fan 9, if abnormal conditions such as overcurrent, overload, or stall occur, the bimetallic strip of the thermal relay FR1, which is connected in series between the normally open contact of the main circuit of contactor KM1 and the cooling fan 9, will bend and deform due to overcurrent heating. When the deformation reaches the action threshold, the normally closed contact of the thermal relay FR1 will open, cutting off the power supply to the coil of contactor KM1. The normally open contact of the main circuit of contactor KM1 will also open, cutting off the AC600V main circuit power supply to the cooling fan 9, and stopping the cooling fan 9. This effectively protects the cooling fan 9 from damage caused by prolonged overload operation. After the fault is cleared, the thermal relay FR1 can be manually reset, and the device can resume normal operation.

[0053] Please refer to Figures 1 to 3 Embodiment two of the present invention is as follows: Please refer to Figure 3 A heat dissipation control method based on the above-mentioned louver control system for a box-type diesel generator set includes the following steps: S1. The main control unit 2 acquires the operating status of the diesel generator set inside the container and the ambient temperature inside the container detected by the temperature detection unit 1. S2. When the operating state is the start state, the main control unit 2 sends an opening command to the first louver control unit 4, and the first louver control unit 4 controls the air inlet and outlet louvers 7 to open according to the opening command. S3. When the operating state is the shutdown state, the main control unit 2 sends a closing command to the first louver control unit 4, and the first louver control unit 4 controls the air inlet and outlet louvers 7 to close according to the closing command; the main control unit 2 performs heat dissipation control operation according to the ambient temperature. The heat dissipation control operation includes: When the ambient temperature is greater than the first preset temperature threshold, the main control unit 2 sends a start command to the second louver control unit 5 and the cooling fan control unit 6 simultaneously through the signal triggering unit 3. The second louver control unit 5 controls the cooling louver 8 to open according to the start command, and the cooling fan control unit 6 controls the cooling fan 9 to start after a first preset time delay according to the start command. When the ambient temperature is lower than the second preset temperature threshold, the main control unit 2 sends a stop command to the second louver control unit 5 and the cooling fan control unit 6 simultaneously through the signal triggering unit 3. The cooling fan control unit 6 controls the cooling fan 9 to stop according to the stop command, and the second louver control unit 5 controls the cooling louver 8 to close after a second preset time delay according to the stop command.

[0054] In this embodiment, the first preset temperature threshold is set to 35°C, the second preset temperature threshold is set to 25°C, the first preset time (i.e., the delay time of relay KT1) is set to 10s, and the second preset time (i.e., the delay time of relay KT2) is set to 10s. The generator set controller 201 is a diesel generator set controller 201 with programmable functionality, which has the above-mentioned temperature threshold and delay time setting parameters preset internally.

[0055] Please refer to Figure 1 and Figure 2 After the control process begins, the generator set controller 201 acquires the real-time operating status of the diesel generator set inside the container through its internal status detection port. This operating status includes both start-up and shutdown states. Simultaneously, the generator set controller 201 continuously receives the resistance signal fed back from the platinum resistance thermometer 101 inside the container through its analog signal input terminal, and calculates the actual ambient temperature value inside the container based on this resistance signal. The generator set controller 201 uses the acquired operating status and temperature value as input parameters for subsequent control decisions.

[0056] When the generator set controller 201 detects that the diesel generator set is in the start-up state, the generator set controller 201 sends an opening command from its control output terminal to the first louver control unit 4 according to its internal preset control logic. The specific execution method of the opening command is as follows: the control output terminal of the generator set controller 201 outputs a DC24V control voltage to the coil of the relay K4. After the coil of the relay K4 is energized, its normally open contact closes, and the DC24V power is supplied to the first motor 401. The first motor 401 rotates in the forward direction, driving the air intake and exhaust louvers 7 to open. After the air intake and exhaust louvers 7 are opened, the air intake and exhaust channels of the container are opened, and outside air can enter the container for the diesel generator set to use for combustion. At the same time, the water tank cooling fan 9 can exhaust hot air to the outside, meeting the air intake and cooling requirements of the unit during normal operation.

[0057] When the generator set controller 201 detects that the diesel generator set is in a shutdown state, it issues a closing command to the first louver control unit 4 according to its internal preset control logic. The execution of this closing command involves two stages: First, the control output of the generator set controller 201 immediately cuts off the DC24V control voltage output to the coil of relay K4, de-energizing the coil and opening its normally open contacts. However, the air intake and exhaust louvers 7 do not close immediately but remain open. Second, the generator set controller 201, according to its internal preset control logic, issues a closing command to the first louver control unit 4. Its internally preset delay program starts timing after detecting a shutdown signal. When the timing reaches 30 seconds, the unit controller 201 outputs a reverse command to the first motor 401, and the first motor 401 runs in reverse, driving the air inlet and exhaust louvers 7 to close. The purpose of this 30-second delay is to allow some of the unit's own heat to dissipate naturally through the air inlet and exhaust louvers 7 after the unit stops, and then perform the louver closing operation to avoid heat accumulation caused by closing the louvers immediately after the unit stops. After the air inlet and exhaust louvers 7 are closed, the container forms a preliminary airtight protection state.

[0058] When the diesel generator set is in a stopped state and the air inlet and outlet louvers 7 are closed, the unit controller 201 compares the ambient temperature value inside the container it acquires with the first preset temperature threshold (i.e., 35℃) and the second preset temperature threshold (i.e., 25℃) in real time, and performs corresponding heat dissipation control operations based on the comparison results.

[0059] When the unit controller 201 determines that the ambient temperature inside the container is greater than 35°C, the unit controller 201 simultaneously sends a start command to the second louver control unit 5 and the cooling fan control unit 6 through the signal triggering unit 3; the specific execution process of this start command is as follows: The control output terminal of the unit controller 201 outputs a DC24V control voltage to the coil of relay K1, energizing the coil of relay K1 and causing its two normally open contacts to close simultaneously. Regarding the second louver control unit 5, after one normally open contact of relay K1 closes, DC24V power is supplied to the coil ends of relay KT2 via this normally open contact, energizing the coil of relay KT2. Since relay KT2 is an energized-and-operate relay, its normally open contact immediately closes, and DC24V power is supplied to the coil ends of relay K3 via this normally open contact. The coil of relay K3 is energized, its normally open contact closes, and DC24V power is supplied to the second motor 501. The second motor 5... 01. In forward operation, the cooling louvers 8 are opened. Regarding the cooling fan control unit 6, after the other normally open contact of relay K1 closes, DC24V power is supplied to the coil ends of relay KT1 via this normally open contact. The coil of relay KT1 is energized. Since relay KT1 is a time-delay type relay, its normally open contact does not close immediately, but only after a first preset time (i.e., 10s). During this 10s delay, the cooling louvers 8 have already completed the opening action. After the 10s delay of relay KT1 ends, its normally open contact closes, and DC24V power is supplied to the coil ends of contactor KM1 via this normally open contact. The coil of contactor KM1 is energized, and its main circuit normally open contact closes, supplying AC600V main circuit power to the cooling fan 9 via the coil of thermal relay FR1. The cooling fan 9 is then energized and starts operating.

[0060] At this time, the heat dissipation louvers 8 are fully open, and the heat dissipation fan 9 is running. Outside cold air enters the container through the heat dissipation louvers 8, exchanges heat with the high-temperature air inside, and is then forcibly expelled outside by the heat dissipation fan 9, forming a forced convection cooling cycle. This forced convection cooling continues, rapidly reducing the temperature inside the container. During the cooling process, if the heat dissipation fan 9 experiences abnormal conditions such as overcurrent, overload, or stall, the bimetallic strip of the thermal relay FR1 connected in series in the main circuit will bend and deform due to overcurrent heating. When the deformation reaches the action threshold, the normally closed contact of the thermal relay FR1 opens, cutting off the power supply circuit of the contactor KM1 coil. The normally open contact of the main circuit of the contactor KM1 opens, cutting off the AC600V main circuit power supply of the heat dissipation fan 9, and the heat dissipation fan 9 stops running, effectively protecting the heat dissipation fan 9 from damage. After the fault is cleared, the thermal relay FR1 is manually reset, and the device returns to normal operation.

[0061] During the heat dissipation process, the unit controller 201 continuously monitors the ambient temperature inside the container through the platinum resistance thermometer 101. When the unit controller 201 determines that the ambient temperature inside the container is less than 25°C, the unit controller 201 simultaneously sends a stop command to the second louver control unit 5 and the cooling fan control unit 6 through the signal triggering unit 3. The specific execution process of this stop command is as follows: The control output terminal of the unit controller 201 cuts off the DC24V control voltage output to the coil of relay K1, de-energizing the coil of relay K1 and simultaneously opening its two normally open contacts. Regarding the cooling fan control unit 6, after the other normally open contact of relay K1 opens, the coil of relay KT1 is de-energized. Since relay KT1 is a time-delay type relay, its normally open contact immediately opens after its coil is de-energized. The coil of contactor KM1 is also de-energized, and its main circuit normally open contact opens, cutting off the AC600V main circuit power supply to the cooling fan 9, causing the cooling fan 9 to stop operating immediately. The immediate stopping of the cooling fan 9 prevents the fan from continuing to operate ineffectively when forced cooling is no longer required in the cabin, saving energy and extending the fan's lifespan. Regarding the second louver control unit 5, after one normally open contact of relay K1 opens, the coil of relay KT2 is de-energized. Since relay KT2 is a power-off delay type relay, its normally open contact does not open immediately, but only after a second preset time (i.e., 10s). During this 10s delay, the heat dissipation louver 8 remains open, and the residual heat inside the container can continue to dissipate naturally through the louver. When the 10s delay of relay KT2 ends, its normally open contact opens, the coil of relay K3 is de-energized, and its normally open contact opens, cutting off the DC24V power supply. At the same time, the unit controller 201 outputs a reverse command to the actuator of the heat dissipation louver 8, and the second motor 501 runs in reverse, driving the heat dissipation louver 8 to close. After the heat dissipation louver 8 closes, the container is completely sealed, restoring the fully sealed protection state and achieving a sealing effect that prevents dust, water, and debris from entering.

[0062] This concludes the complete heat dissipation control process after the unit is shut down. If the unit is subsequently restarted, the intake and exhaust louver 7 control process in the startup state will be executed again; if the unit remains shut down and the temperature rises again to above 35°C, the high-temperature startup heat dissipation operation will be executed again to restart the heat dissipation function, thus achieving cyclic heat dissipation control in the shutdown state.

[0063] In summary, the present invention provides a louver control system and heat dissipation control method for a containerized diesel generator set. By setting a temperature detection unit to monitor the ambient temperature inside the container in real time, the main control unit outputs control commands based on the operating status of the diesel generator set and the temperature signal. The signal triggering unit controls the first louver control unit, the second louver control unit, and the cooling fan control unit, respectively, achieving independent control of the air intake and exhaust louvers and the heat dissipation louvers. The air intake and exhaust louvers are linked to the generator set's start and stop, while the heat dissipation louvers and cooling fan are autonomously controlled based on the temperature. After the generator set stops, the heat dissipation louvers automatically open according to the temperature inside the container, cooperating with the cooling fan for forced convection cooling, effectively solving the problem of residual heat accumulation after shutdown. This achieves automatic control of the opening of the heat dissipation louvers and the operation of the cooling fan based on the temperature inside the container after the generator set stops, quickly dissipating residual heat from the container and thus protecting equipment safety.

[0064] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A louver control system for a box-type diesel generator set, characterized in that, It includes a temperature detection unit, a main control unit, a signal triggering unit, a first louver control unit, a second louver control unit, and a cooling fan control unit. The signal triggering unit is connected to the main control unit, the second louver control unit, and the cooling fan control unit, respectively. The main control unit is connected to the temperature detection unit and the first louver control unit, respectively. The first louver control unit is used to control the operation of the air inlet and outlet louvers; The second louver control unit is used to control the operation of the heat dissipation louvers according to the trigger signal output by the signal trigger unit; The cooling fan control unit is used to control the operation of the cooling fan according to the trigger signal output by the signal triggering unit.

2. The louver control system for a box-type diesel generator set according to claim 1, characterized in that, The signal triggering unit includes a relay K1, the coil of which is connected to the main control unit, one normally open contact of which is connected to the second louver control unit, and the other normally open contact of which is connected to the cooling fan control unit.

3. The louver control system for a box-type diesel generator set according to claim 1, characterized in that, The first louver control unit includes a relay K4 and a first motor. The coil of the relay K4 is connected to the main control unit, and the normally open contact of the relay K4 is connected to the air inlet and outlet louvers through the first motor.

4. The louver control system for a box-type diesel generator set according to claim 1, characterized in that, The second louver control unit includes a relay KT2, a relay K3, and a second motor. The coil of the relay KT2 is connected to a signal triggering unit, the normally open contact of the relay KT2 is connected to the coil of the relay K3, and the normally open contact of the relay K3 is connected to the heat dissipation louver.

5. The louver control system for a box-type diesel generator set according to claim 4, characterized in that, The relay KT2 is a time-delay relay.

6. The louver control system for a box-type diesel generator set according to claim 1, characterized in that, The cooling fan control unit includes a relay KT1 and a contactor KM1. The coil of the relay KT1 is connected to a signal triggering unit, the normally open contact of the relay KT1 is connected to the coil of the contactor KM1, and the normally open contact of the contactor KM1 is connected to the cooling fan.

7. The louver control system for a box-type diesel generator set according to claim 6, characterized in that, The relay KT1 is a time-delay relay.

8. The louver control system for a box-type diesel generator set according to claim 6, characterized in that, The cooling fan control unit also includes a thermal relay FR1, the coil of which is connected in series between the normally open contact of contactor KM1 and the cooling fan.

9. The louver control system for a box-type diesel generator set according to claim 1, characterized in that, The temperature detection unit includes a platinum resistance thermometer, one end of which is connected to the analog signal input terminal of the main control unit, and the other end of which is connected to the common analog signal terminal of the main control unit.

10. A heat dissipation control method based on the louver control system of a box-type diesel generator set according to any one of claims 1 to 9, characterized in that, Includes the following steps: S1. The main control unit acquires the operating status of the diesel generator set inside the container and the ambient temperature inside the container detected by the temperature detection unit. S2. When the operating state is the start state, the main control unit sends an opening command to the first louver control unit, and the first louver control unit controls the air inlet and outlet louvers to open according to the opening command. S3. When the operating state is the shutdown state, the main control unit sends a closing command to the first louver control unit, and the first louver control unit controls the air inlet and outlet louvers to close according to the closing command; the main control unit performs heat dissipation control operation according to the ambient temperature. The heat dissipation control operation includes: When the ambient temperature is greater than the first preset temperature threshold, the main control unit sends a start command to the second louver control unit and the cooling fan control unit simultaneously through the signal triggering unit. The second louver control unit controls the cooling louver to open according to the start command, and the cooling fan control unit controls the cooling fan to start after a first preset time delay according to the start command. When the ambient temperature is lower than the second preset temperature threshold, the main control unit sends a stop command to both the second louver control unit and the cooling fan control unit through the signal triggering unit. The cooling fan control unit controls the cooling fan to stop according to the stop command, and the second louver control unit controls the cooling louvers to close after a second preset time delay according to the stop command.

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