A fast power supply module for refrigerated container refrigeration units

Abstract

This utility model discloses a rapid power supply module for a refrigerated container refrigeration unit, comprising a transformer, a circuit breaker, a PWM controller, and a galvanized base plate. The transformer, circuit breaker, and PWM controller are all assembled on the galvanized base plate. The PWM controller integrates an AC / AD conversion circuit, a DC fan control circuit, an MCU microcontroller unit, and relay and MOSFET output circuits. The DC fan control circuit is electrically connected to the J7 terminal of the PWM controller. This utility model monitors the module's temperature through temperature monitoring and fan control technology, cooling the module as needed to reduce damage to the refrigerated container refrigeration unit. It also improves the stability of power supply to the equipment. Furthermore, the entire power supply module is integrated internally, solving the problems of external wiring affecting aesthetics and posing risks of impact damage in existing technologies, thus reducing safety hazards.

Description

Technical Field

[0001] This utility model relates to the field of refrigerated container technology, and in particular to a fast power supply module for a refrigeration unit in a refrigerated container. Background Technology

[0002] Currently, the power demand in the refrigerated container industry is diversified, such as lighting, refrigeration, and ventilation. Therefore, compared with the traditional container industry, the internal circuit wiring and connection links have higher requirements for power quality stability. With the increasing number of power modules, the traditional circuit power supply method can no longer meet the current needs and poses certain safety hazards. Currently, there are two methods for powering refrigeration units in refrigerated containers. One method is to directly draw power from the refrigeration unit's power distribution control box, with exposed wiring. This method results in exposed wiring, affecting aesthetics and making the unit susceptible to damage during long-term use, posing potential risks. The other method is to install a power module at the refrigeration unit's control box and draw power directly from it. This method is cumbersome and greatly increases the amount of installation work. Furthermore, the voltage is unstable due to the direct use of the power module, which can easily cause voltage instability inside the container, unnecessary damage to electrical appliances, and potential hazards. It also increases the difficulty of after-sales maintenance and repair. In view of the above, this application proposes a rapid power supply module for refrigerated container refrigeration units. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a fast power supply module for refrigerated container refrigeration units.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A fast power supply module for a refrigerated container refrigeration unit includes a transformer, a circuit breaker, a PWM controller, and a galvanized base plate, wherein the transformer, circuit breaker, and PWM controller are all assembled on the galvanized base plate; The PWM controller integrates an AC / AD conversion circuit, a DC fan control circuit, an MCU microcontroller unit, and relay and MOSFET output circuits. The DC fan control circuit is electrically connected to the J7 terminal of the PWM controller, the AC / AD conversion circuit is electrically connected to the J2 terminal of the PWM controller, and the relay and MOSFET output circuits are electrically connected to the J5 terminal of the PWM controller. The J4 terminal of the PWM controller is electrically connected to either an onboard NTC or an external NTC.

[0005] Preferably, the AC / AD conversion circuit includes a chip U5. Pin 1 of chip U5 is grounded. Pins 3 and 4 of chip U5 are electrically connected to pins 1 and 2 of terminal J2 of the PWM controller, respectively. Pin 2 of chip U5 is electrically connected to pin 1 of rectifier bridge D1. Pin 1 of rectifier bridge D1 is electrically connected to one end of electrolytic capacitor EC1, one end of electrolytic capacitor EC2, and one end of capacitor C4. The other end of electrolytic capacitor EC1, pin 4 of rectifier bridge D1, pin 3 of rectifier bridge D1, and... The other ends of electrolytic capacitor EC2 and capacitor C4 are both grounded. One end of electrolytic capacitor EC2 and one end of capacitor C4 are both electrically connected to pin 2 of chip U5. One end of fuse F1 is electrically connected to pin 2 of rectifier bridge D1. The other end of fuse F1 is electrically connected to pin 2 of terminal P1 of PWM controller. Pin 1 of terminal P1 of PWM controller is grounded. One end of varistor RV1 is electrically connected to pin 2 of terminal P1 of PWM controller. The other end of varistor RV1 is grounded.

[0006] Preferably, the DC fan control circuit includes a transistor Q4. Pin 1 of transistor Q4 is electrically connected to one end of resistor R37 and one end of resistor R38. The other end of resistor R38 and pin 2 of transistor Q4 are both grounded. Pin 3 of transistor Q4 is electrically connected to one end of resistor R36 and one end of resistor R173. The other end of resistor R173 is electrically connected to pin 2 of the J7 terminal of the PWM controller. Pin 3 of the J7 terminal of the PWM controller is grounded. Pin 1 of the J7 terminal of the PWM controller is electrically connected to one end of resistor R11 and one end of resistor R12. The other ends of resistor R11 and the other ends of resistor R12 are electrically connected to 24V and 5V voltages, respectively.

[0007] Preferably, the MCU microcontroller unit includes a chip U1, with one end of a resistor R21 electrically connected to pin 1 of the chip U1, and the other end of the resistor R21 and pin 15 of the chip U1 both grounded.

[0008] Preferably, the relay and MOSFET output circuit includes a transistor Q1. Pin 1 of transistor Q1 is electrically connected to one end of resistor R23 and one end of resistor R17. The other end of resistor R17 is electrically connected to one end of resistor R15. Pin 2 of transistor Q1 is electrically connected to one end of resistor R39. The other end of resistor R23 is electrically connected to pin 3 of transistor Q2. Pin 1 of transistor Q2 is electrically connected to one end of resistor R27 and one end of resistor R30. The other end of resistor R30 and pin 2 of transistor Q2 are both grounded. Pin 3 of transistor Q1 is electrically connected to one end of resistor R25 and the cathode of diode D21. The other end of resistor R25 is electrically connected to the anode of diode D21. The other end of resistor R25 is also electrically... Pin 1 of transistor array QA2 is electrically connected to one end of resistor R31. Pin 2 of transistor array QA2 is electrically connected to the anode of diode D20. The cathode of diode D20 is electrically connected to pin 2 of terminal J9 of PWM controller 4. Pin 1 of terminal J9 of PWM controller is electrically connected to pin 2 of transistor array QA2. Pin 3 of transistor array QA2 is electrically connected to one end of resistor R11. The other ends of resistor R11 and resistor R31 are both grounded. Pin 3 of transistor array QA2 is electrically connected to one end of resistor R26. The other end of resistor R26 is electrically connected to one end of capacitor C12 and the anode of diode D6. The other end of capacitor C12 is grounded.

[0009] Preferably, one end of the onboard NTC is electrically connected to one end of resistor R6 and one end of resistor R4, the other end of resistor R4 is electrically connected to one end of capacitor C8, and the other ends of resistor R6 and capacitor C8 are both grounded. One end of the external NTC is electrically connected to one end of resistor R5 and one end of resistor R7. The other end of resistor R5 is electrically connected to one end of capacitor C9. The other ends of resistor R7 and capacitor C9 are both grounded.

[0010] Preferably, the J5 terminal of the PWM controller is used to receive a passive closing signal. When a passive closing signal is received, the relay and the MOSFET output simultaneously. The relay is a passive output and can be connected to a DC or AC load according to actual needs. The MOSFET outputs 24V and controls loads below 24V 3A. If the load exceeds 3.5A, the output stops.

[0011] Compared with existing technologies, the beneficial effects of this utility model are: This invention uses temperature monitoring and fan control technology to monitor the module's temperature and cool it down in a timely manner, reducing damage to the refrigeration unit of the refrigerated container. In addition, it solves the problem of power supply stability, and the entire power supply module is integrated and set inside, which solves the problem of the wiring being set on the outside in the prior art, affecting aesthetics and being damaged by bumps and knocks, thus reducing safety hazards. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a fast power supply module for a refrigerated container refrigeration unit proposed in this utility model; Figure 2 This is a schematic diagram of the transformer in a rapid power supply module for a refrigerated container refrigeration unit proposed in this utility model; Figure 3 This is a schematic diagram of the circuit breaker for a fast power supply module of a refrigerated container refrigeration unit proposed in this utility model; Figure 4 This is a schematic diagram of the PWM controller in the fast power supply module of a refrigerated container refrigeration unit proposed in this utility model; Figure 5 The circuit diagram of the MCU microcontroller unit in the fast power supply module of the refrigeration unit of the refrigeration container proposed in this utility model; Figure 6 This invention provides a circuit diagram of the DC fan control circuit in a rapid power supply module for a refrigerated container refrigeration unit. Figure 7 The circuit diagram of the relay and MOSFET output circuit in the fast power supply module of the refrigeration unit of the refrigeration container proposed in this utility model; Figure 8 This is a circuit diagram showing the connection between the onboard NTC and the external NTC in a fast power supply module for a refrigerated container refrigeration unit proposed in this utility model. Figure 9 The circuit diagram of the AC / AD conversion circuit in the fast power supply module of the refrigeration unit of the refrigerated container proposed in this utility model.

[0013] In the diagram: 1. Galvanized base plate; 2. Transformer; 3. Circuit breaker; 4. PWM controller. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0015] Reference Figure 1-9A fast power supply module for a refrigerated container refrigeration unit includes a transformer 2, a circuit breaker 3, a PWM controller 4, and a galvanized base plate 1. The transformer 2, circuit breaker 3, and PWM controller 4 are all assembled on the galvanized base plate 1. The PWM controller 4 integrates an AC / AD conversion circuit, a DC fan control circuit, an MCU microcontroller unit, and relay and MOSFET output circuits. The DC fan control circuit is electrically connected to the J7 terminal of the PWM controller 4, the AC / AD conversion circuit is electrically connected to the J2 terminal of the PWM controller 4, and the relay and MOSFET output circuits are electrically connected to the J5 terminal of the PWM controller 4. The J5 terminal of the PWM controller 4 is used to receive a passive closing signal. When a passive closing signal is received, the relay and MOSFET output simultaneously. The relay is a passive output and can be connected to a DC or AC load according to actual needs. The MOSFET outputs 24V and controls loads below 24V 3A. If the load exceeds 3.5A, the output stops. The J4 terminal of the PWM controller 4 is electrically connected to an onboard NTC or an external NTC; The AC / AD conversion circuit includes chip U5. Pin 1 of chip U5 is grounded. Pins 3 and 4 of chip U5 are electrically connected to pins 1 and 2 of terminal J2 of PWM controller 4, respectively. Pin 2 of chip U5 is electrically connected to pin 1 of rectifier bridge D1. Pin 1 of rectifier bridge D1 is electrically connected to one end of electrolytic capacitor EC1, one end of electrolytic capacitor EC2, and one end of capacitor C4. The other end of electrolytic capacitor EC1, pin 4 of rectifier bridge D1, pin 3 of rectifier bridge D1, and electrolytic capacitor E... The other end of C2 and the other end of capacitor C4 are both grounded. One end of electrolytic capacitor EC2 and one end of capacitor C4 are both electrically connected to pin 2 of chip U5. One end of fuse F1 is electrically connected to pin 2 of rectifier bridge D1. The other end of fuse F1 is electrically connected to pin 2 of P1 terminal of PWM controller 4. Pin 1 of P1 terminal of PWM controller 4 is grounded. One end of varistor RV1 is electrically connected to pin 2 of P1 terminal of PWM controller 4. The other end of varistor RV1 is grounded. The DC fan control circuit includes a transistor Q4. Pin 1 of transistor Q4 is electrically connected to one end of resistor R37 and one end of resistor R38. The other end of resistor R38 and pin 2 of transistor Q4 are both grounded. Pin 3 of transistor Q4 is electrically connected to one end of resistor R36 and one end of resistor R173. The other end of resistor R173 is electrically connected to pin 2 of terminal J7 of PWM controller 4. Pin 3 of terminal J7 of PWM controller 4 is grounded. Pin 1 of terminal J7 of PWM controller 4 is electrically connected to one end of resistor R11 and one end of resistor R12. The other ends of resistor R11 and resistor R12 are electrically connected to 24V and 5V voltages, respectively. The MCU microcontroller unit includes chip U1. Pin 1 of chip U1 is electrically connected to one end of resistor R21, and the other end of resistor R21 and pin 15 of chip U1 are both grounded. The relay and MOSFET output circuit includes transistor Q1. Pin 1 of transistor Q1 is electrically connected to one end of resistor R23 and one end of resistor R17. The other end of resistor R17 is electrically connected to one end of resistor R15. Pin 2 of transistor Q1 is electrically connected to one end of resistor R39. The other end of resistor R23 is electrically connected to pin 3 of transistor Q2. Pin 1 of transistor Q2 is electrically connected to one end of resistor R27 and one end of resistor R30. The other end of resistor R30 and pin 2 of transistor Q2 are both grounded. Pin 3 of transistor Q1 is electrically connected to one end of resistor R25 and the cathode of diode D21. The other end of resistor R25 is electrically connected to the anode of diode D21. The other end of resistor R25 is also electrically connected to... Pin 1 of transistor array QA2 is electrically connected to one end of resistor R31. Pin 2 of transistor array QA2 is electrically connected to the anode of diode D20. The cathode of diode D20 is electrically connected to pin 2 of terminal J9 of PWM controller 4. Pin 1 of terminal J9 of PWM controller 4 is electrically connected to pin 2 of transistor array QA2. Pin 3 of transistor array QA2 is electrically connected to one end of resistor R11. The other ends of resistor R11 and resistor R31 are both grounded. Pin 3 of transistor array QA2 is electrically connected to one end of resistor R26. The other end of resistor R26 is electrically connected to one end of capacitor C12 and the anode of diode D6. The other end of capacitor C12 is grounded. One end of the onboard NTC is electrically connected to one end of resistor R6 and one end of resistor R4. The other end of resistor R4 is electrically connected to one end of capacitor C8. The other ends of resistor R6 and capacitor C8 are both grounded. One end of the external NTC is electrically connected to one end of resistor R5 and one end of resistor R7. The other end of resistor R5 is electrically connected to one end of capacitor C9. The other ends of resistor R7 and capacitor C9 are both grounded. This utility model monitors the module temperature through temperature monitoring and fan control technology, and cools the module in a timely manner to reduce damage to the refrigeration unit of the refrigerated container. In addition, it solves the problem of power supply stability of the equipment. Moreover, the entire power supply module is integrated and set inside, which solves the problem of the wiring being set on the outside in the prior art, affecting the aesthetics and being damaged by bumps and knocks, and reduces safety hazards.

[0016] Working principle: The equipment requiring power is connected to transformer 2 of the power supply module via wires. One end of transformer 2 is connected to circuit breaker 3 and PWF controller 4. PWF controller 4 provides efficient and stable power supply and intelligent cooling for the power control box through AC / AD conversion circuit and DC fan control circuit. At the same time, the MCU microcontroller unit of PWF controller 4 converts AC voltage (20-26V) to DC voltage of 24V and adjusts the speed of DC fan according to the temperature of onboard NTC or external NTC, thereby providing intelligent cooling for the power control box. In addition, PWF controller 4 can also control the load output according to the input of passive signal. It has relay and MOSFET outputs to facilitate the control of different loads, thus solving the problem of power supply stability of the equipment. At the same time, through temperature monitoring and fan control technology, the temperature of the module is monitored and the module is cooled in time to reduce damage to the refrigeration unit of the refrigerated container. In addition, transformer 2, circuit breaker 3 and PWM controller 4 are all assembled on galvanized base plate 1, and their circuits are all set inside, so there will be no exposed wires that affect the appearance. The integrated installation inside can effectively reduce the risk of impact damage and reduce safety hazards.

[0017] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A quick power taking module of a refrigerated container cold machine unit, characterized in that, The system includes a transformer (2), a circuit breaker (3), a PWM controller (4), and a galvanized base plate (1). The transformer (2), the circuit breaker (3), and the PWM controller (4) are all assembled on the galvanized base plate (1). The PWM controller (4) integrates an AC / AD conversion circuit, an MCU microcontroller unit, and relay and MOS transistor output circuits. The AC / AD conversion circuit is electrically connected to the J2 terminal of the PWM controller (4), and the relay and MOS transistor output circuits are electrically connected to the J5 terminal of the PWM controller (4).

2. A quick power take-off module for a reefer container chiller unit as claimed in claim 1, characterized in that, The AC / AD conversion circuit includes a chip U5. Pin 1 of chip U5 is grounded. Pins 3 and 4 of chip U5 are electrically connected to pins 1 and 2 of terminal J2 of PWM controller (4), respectively. Pin 2 of chip U5 is electrically connected to pin 1 of rectifier bridge D1. Pin 1 of rectifier bridge D1 is electrically connected to one end of electrolytic capacitor EC1, one end of electrolytic capacitor EC2, and one end of capacitor C4. The other end of electrolytic capacitor EC1, pin 4 of rectifier bridge D1, pin 3 of rectifier bridge D1, and electrolytic capacitor EC2 are also connected to pin 4 of rectifier bridge D1. The other end of 2 and the other end of capacitor C4 are both grounded. One end of electrolytic capacitor EC2 and one end of capacitor C4 are both electrically connected to pin 2 of chip U5. One end of fuse F1 is electrically connected to pin 2 of rectifier bridge D1. The other end of fuse F1 is electrically connected to pin 2 of P1 terminal of PWM controller (4). Pin 1 of P1 terminal of PWM controller (4) is grounded. One end of varistor RV1 is electrically connected to pin 2 of P1 terminal of PWM controller (4). The other end of varistor RV1 is grounded.

3. The quick power take-off module for a reefer container chiller unit of claim 1, wherein, The PWM controller (4) also integrates a DC fan control circuit. The DC fan control circuit is electrically connected to the J7 terminal of the PWM controller (4). The DC fan control circuit includes a transistor Q4. One end of resistor R37 and one end of resistor R38 are electrically connected to pin 1 of transistor Q4. The other end of resistor R38 and pin 2 of transistor Q4 are both grounded. One end of resistor R36 and one end of resistor R173 are electrically connected to pin 2 of the J7 terminal of the PWM controller (4). Pin 3 of the J7 terminal of the PWM controller (4) is grounded. One end of resistor R11 and one end of resistor R12 are electrically connected to pin 1 of the J7 terminal of the PWM controller (4). The other ends of resistor R11 and R12 are electrically connected to 24V and 5V voltages, respectively.

4. The quick power take-off module for a reefer container chiller unit of claim 1, wherein, The MCU microcontroller unit includes a chip U1. One end of a resistor R21 is electrically connected to pin 1 of the chip U1, and the other end of the resistor R21 and pin 15 of the chip U1 are both grounded.

5. The quick power take-off module for a reefer container chiller unit of claim 1, wherein, The relay and MOSFET output circuit includes transistor Q1. Pin 1 of transistor Q1 is electrically connected to one end of resistor R23 and one end of resistor R17. The other end of resistor R17 is electrically connected to one end of resistor R15. Pin 2 of transistor Q1 is electrically connected to one end of resistor R39. The other end of resistor R23 is electrically connected to pin 3 of transistor Q2. Pin 1 of transistor Q2 is electrically connected to one end of resistor R27 and one end of resistor R30. The other end of resistor R30 and pin 2 of transistor Q2 are both grounded. Pin 3 of transistor Q1 is electrically connected to one end of resistor R25 and the cathode of diode D21. The other end of resistor R25 is electrically connected to the anode of diode D21. The other end of resistor R25 is also electrically connected to a crystal... Pin 1 of transistor array QA2 is electrically connected to one end of resistor R31. Pin 2 of transistor array QA2 is electrically connected to the positive terminal of diode D20. The negative terminal of diode D20 is electrically connected to pin 2 of terminal J9 of PWM controller (4). Pin 1 of terminal J9 of PWM controller (4) is electrically connected to pin 2 of transistor array QA2. Pin 3 of transistor array QA2 is electrically connected to one end of resistor R11. The other end of resistor R11 and the other end of resistor R31 are both grounded. Pin 3 of transistor array QA2 is electrically connected to one end of resistor R26. The other end of resistor R26 is electrically connected to one end of capacitor C12 and the positive terminal of diode D6. The other end of capacitor C12 is grounded.

6. A quick power take-off module for a reefer container chiller unit as claimed in claim 1, characterized in that, The J5 terminal of the PWM controller (4) is used to receive a passive closing signal. When the passive closing signal is received, the relay and the MOSFET output simultaneously. The relay is a passive output and can be connected to a DC or AC load according to actual needs. The MOSFET outputs 24V and controls loads below 24V 3A. If the load exceeds 3.5A, the output stops.

7. A quick power take-off module for a reefer container chiller unit as claimed in claim 1, characterized in that, The J4 terminal of the PWM controller (4) is electrically connected to an onboard NTC or an external NTC.

8. A quick power take-off module for a reefer container chiller unit as claimed in claim 7, characterized in that, One end of the onboard NTC is electrically connected to one end of resistor R6 and one end of resistor R4, the other end of resistor R4 is electrically connected to one end of capacitor C8, and the other ends of resistor R6 and capacitor C8 are both grounded. One end of the external NTC is electrically connected to one end of resistor R5 and one end of resistor R7. The other end of resistor R5 is electrically connected to one end of capacitor C9. The other ends of resistor R7 and capacitor C9 are both grounded.

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