An environmental control cabinet

Abstract

The utility model discloses an environmental control cabinet, it includes cabinet, power distribution module, fan heat subassembly, sensor group and control box, the front, rear cabinet door of cabinet all is provided with the array of hollow heat dissipation hole, power distribution module installs in the cabinet, provides the power supply interface of connecting external power supply, fan heat subassembly embeddedly installs in the cabinet door of cabinet, sensor group includes a plurality of sensor that arranges in the cabinet, control box includes the control panel in the case and case.

Description

Technical Field

[0001] This utility model relates to the field of server rack technology, specifically to an environmental control rack. Background Technology

[0002] Temperature-controlled cabinets are devices that integrate temperature monitoring, automatic adjustment, and safety protection, and are widely used in data centers, communication base stations, industrial control, and other fields.

[0003] For example, Chinese Patent Publication No. CN206332965U discloses a cabinet heat dissipation device and system. The device includes an intelligent temperature control component, a heat dissipation component, and a water-cooling component, all electrically connected to an external power supply. The intelligent temperature control component includes multiple temperature and humidity sensors and an intelligent controller. The heat dissipation component includes at least one fan hood, and the water-cooling component includes water-cooling pipes, a water pump, and a sealed cooling pool located beneath the cabinet. This cabinet heat dissipation device and system, in addition to dissipating heat from the cabinet through the heat dissipation component, further effectively dissipates heat from the cabinet through the water-cooling component. The intelligent controller adjusts the power of the heat dissipation component and the water-cooling component to keep the temperature inside the cabinet below a set threshold, ensuring stable operation of the equipment within the cabinet and improving safety.

[0004] As the requirements for server racks become increasingly demanding, such as the need for racks to have displays for real-time temperature monitoring and multiple cooling fans to automatically regulate the temperature within the rack to maintain a set range and prevent overheating damage to the equipment; sometimes, it is also necessary to integrate monitoring of multiple parameters such as temperature and humidity, multi-point temperature, smoke, and water immersion to provide alarms for abnormalities; and some scenarios even require simultaneous support for multiple communication transmission channels to enable remote data viewing and parameter adjustment. When these requirements arise simultaneously, existing environmental control designs separate the control boards for each function, adding a new circuit board for each new function. This results in a large overall environmental control circuit box that occupies a significant amount of the limited space within the rack, negatively impacting heat dissipation and the number of devices that can be accommodated. Utility Model Content

[0005] This utility model provides an environmental control cabinet that improves the internal space utilization of the cabinet through integrated overall design, and achieves multiple requirements such as multi-parameter synchronous detection and multiple communication methods.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: An environmental control cabinet includes a cabinet body, a power distribution module, a heat dissipation assembly, a sensor group, and a control box; the front and rear doors of the cabinet body are provided with an array of perforated heat dissipation holes; the power distribution module is installed in the cabinet body and provides a power supply interface for connecting to an external power source; the heat dissipation assembly is embedded in the cabinet door; and the sensor group includes multiple sensors arranged inside the cabinet body. The control box includes a chassis and a control board inside the chassis. The chassis is mounted in a cabinet via a bracket. The control board includes an AT32F407 series processor chip. The first set of UART interfaces of the processor chip is connected to a fourth communication chip (model SIT3485ESA) and a first peripheral circuit to provide an RS485 communication serial port. The second set of UART interfaces of the processor chip is connected to a third communication chip (model D3232) to provide an RS232 communication serial port. The first set of RMII interfaces of the processor chip is connected to a radio frequency signal processing chip and a third peripheral circuit to provide an ETH communication serial port. The third set of UART interfaces of the processor chip is connected to a first communication chip (model RTL8201F-VB-CG) and a fourth peripheral circuit to provide a 4G communication interface. The first set of analog input pins of the processor chip is connected to a fifth peripheral circuit to provide multiple ADC interfaces for sensors.

[0007] Furthermore, the MDIO pin of the first communication chip is connected to the PA2 pin of the processor chip, and the MDC pin of the first communication chip is connected to the PC1 pin of the processor chip; the CRS / CES_DV pin, TXC pin, TXEN pin, TXDO pin, TXD1 pin, RXDO pin, and RXD1 pin of the first communication chip are connected to the PA7 pin, PA1 pin, PB11 pin, PB12 pin, PB13 pin, PC4 pin, and PC5 pin of the processor chip in sequence; a signal transformer of model H1102NLT is connected between the MDI pin of the first communication chip and the 4G communication interface.

[0008] Furthermore, the first peripheral circuit includes an isolator connected to the fourth communication chip on one side, and the other side of the isolator is connected to the RS485 communication serial port, with a thirtieth resistor connected between the two wires. The two wires of the RS485 communication serial port are respectively grounded through a transient suppression diode.

[0009] Furthermore, the intrusion detection interface of the processor chip is connected to the anode of a Schottky diode, the cathode of the Schottky diode is connected to an external dry contact input terminal, and the anode of the Schottky diode is also connected to a 3.3V voltage through a resistor and grounded through a capacitor.

[0010] Furthermore, the GPIO port of the processor chip is connected to the gate (G) of the seventh NMOS transistor via a resistor, the source (S) of the seventh NMOS transistor is grounded, and the drain (D) of the seventh NMOS transistor is connected to the release voltage terminal V via a first diode. Rel The first diode is connected in parallel with a relay. One side of the relay coil is connected to the two ends of the first diode, and the other side of the relay coil is connected to an external dry contact output terminal.

[0011] Furthermore, the sensor group includes a humidity sensor, a temperature sensor distributed at multiple points inside the cabinet, a smoke sensor, and a water immersion sensor. The output of each sensor is connected to an ADC interface. The fifth peripheral circuit includes a multi-channel ADC conversion circuit, which includes a ninth amplifier. The non-inverting input of the ninth amplifier is connected to an ADC interface through a sixty-seventh resistor. The non-inverting input of the ninth amplifier is grounded through a forty-fifth capacitor and connected to a 3.3V voltage through a sixty-third resistor. The forty-fifth capacitor is connected in parallel with the ninety-fifth resistor. The inverting input of the ninth amplifier is grounded through a ninety-ninth resistor. The output of the ninth amplifier is connected to the ninety-ninth resistor through a ninety-first resistor. The output of the ninth amplifier is connected to the first set of analog input pins of the processor chip.

[0012] Furthermore, the control board also includes a step-down module, which includes an SCT2432STER step-down converter chip that converts the power supply to 5V, and an LM1117MPX-3.3 power management chip that converts the 5V voltage to 3.3V.

[0013] Compared with the prior art, the advantages of this utility model are as follows: the integrated design of the control board enables simultaneous acquisition of multiple environmental parameters and communication with external devices through multiple communication methods, improving adaptability to different field requirements and enhancing practicality; at the same time, it also makes the control box as small as possible, occupying less cabinet space. Attached Figure Description

[0014] Figure 1 This is a functional schematic diagram of the control board of this utility model.

[0015] Figure 2 This is a schematic diagram of the pin configuration of the processor chip in one embodiment of the present invention.

[0016] Figure 3 This is a schematic diagram of the pin configuration of the processor chip in one embodiment of the present invention.

[0017] Figure 4 This is a schematic diagram of the first peripheral circuit in one embodiment of the present invention.

[0018] Figure 5 This is a pin diagram of the RS232 communication chip in one embodiment of the present invention.

[0019] Figure 6 This is a schematic diagram of the fourth peripheral circuit in one embodiment of the present invention.

[0020] Figure 7 This is a circuit diagram of a dry contact input in one embodiment of the present invention.

[0021] Figure 8 This is a circuit diagram of dry contact output in one embodiment of the present invention.

[0022] Figure 9 This is a circuit diagram of the ADC conversion circuit in one embodiment of the present invention.

[0023] Figure 10 This is one of the circuit schematic diagrams of the step-down module in one embodiment of this utility model.

[0024] Figure 11 This is the second circuit diagram of the step-down module in one embodiment of the present invention.

[0025] Figure 12 This is the third circuit diagram of the step-down module in one embodiment of the present invention.

[0026] Figure 13 This is the fourth circuit diagram of the step-down module in one embodiment of the present invention. Detailed Implementation

[0027] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0028] This utility model provides an environmental control cabinet, which includes a cabinet body, a power distribution module, a heat dissipation assembly, a sensor group, and a control box. The cabinet body features a front and rear door design, with perforated ventilation holes in both doors for heat dissipation. The heat dissipation assembly is embedded in the cabinet doors, accelerating ventilation and heat dissipation when the internal temperature and humidity are too high. The cabinet interior includes mounting brackets and slots for securing servers, switches, and other equipment. The power distribution module, installed within the cabinet, provides a power interface for connecting to an external power source, transforming mains or industrial power to supply power to the equipment and control box within the cabinet. The sensor group includes multiple sensors deployed within the cabinet, including a humidity sensor to detect internal humidity, temperature sensors evenly distributed at multiple points within the cabinet to detect localized temperatures, smoke sensors to detect smoke from burnt-out equipment or wiring, and water immersion sensors to detect water seepage into the cabinet. Power sensors for detecting parameters such as voltage and current can also be added as needed.

[0029] The control box includes a chassis and a control board inside the chassis. The chassis is mounted on a mounting bracket inside the cabinet via a bracket. The control board is used to collect detection parameters from the aforementioned sensors and provides multiple communication interfaces. Based on the collected sensor signals such as temperature, humidity, and smoke concentration, it transmits data to the monitoring room or host computer via data communication. It also controls the cooling and ventilation components via dry contacts. An alarm can be added to alert for abnormal environmental conditions when necessary. Its control logic is existing technology, such as the control methods disclosed in Chinese Patent Publication Nos. CN103543718B and CN118232481B. The control logic is not the focus of this application. The improvement of this utility model lies in the integration of the control board, which enables simultaneous acquisition of multiple environmental parameters and communication with external devices through multiple communication methods, improving adaptability to different site requirements and enhancing practicality. At the same time, it also makes the control box as small as possible, occupying less cabinet space.

[0030] The control board includes an AT32F407 series processor chip U10, such as AT32F407VGT6. The first UART interface of the processor chip U10 is connected to a fourth communication chip U4 (model SIT3485ESA) and a first peripheral circuit to provide an RS485 communication serial port. The second UART interface of the processor chip U10 is connected to a third communication chip U3 (model D3232) to provide an RS232 communication serial port. The first RMII interface of the processor chip U10 is connected to an RF signal processing chip and a third peripheral circuit to provide an ETH communication serial port. The third UART interface of the processor chip U10 is connected to a first communication chip U1 (model RTL8201F-VB-CG) and a fourth peripheral circuit to provide a 4G communication interface. The first analog input pin of the processor chip U10 is connected to a fifth peripheral circuit to provide multiple ADC interfaces for sensors.

[0031] For a functional diagram of the control panel, please refer to Figure 1 As shown. Figure 2 and Figure 3 This is a pin configuration of the processor chip U10 in one embodiment. Due to the large number of pins, the processor chip U10 is shown in separate sections. Figure 2 This is a pinout diagram for part B of U10. Figure 3 The diagram shows the pinout of section C of U10. In this embodiment, the pins are designed with 8-channel sensor signals, 8-channel dry contact input, and 8-channel dry contact output. Considering the need for multiple communication serial ports, alarm control, etc., in addition to the chip's default analog input pins and UART interface, some other pins have been configured to provide suitable input and output pins, as shown in the figure.

[0032] In one embodiment, the integration of 4G communication can be achieved by introducing a 4G communication chip, such as... Figure 6 As shown, the MDIO pin of the first communication chip U1 is connected to the PA2 pin of the processor chip U10, and the MDC pin of the first communication chip U1 is connected to the PC1 pin of the processor chip U10. The CRS / CES_DV, TXC, TXEN, TXDO, TXD1, RXDO, and RXD1 pins of the first communication chip U1 are connected to the PA7, PA1, PB11, PB12, PB13, PC4, and PC5 pins of the processor chip U10, respectively. Considering electromagnetic interference from equipment and power distribution modules within the cabinet, a signal transformer T1 of model H1102NLT is connected between the MDI pin of the first communication chip U1 and the 4G communication interface to block ground loop interference and ensure a clean and stable 4G signal.

[0033] In one embodiment, the integration of RS485 communication can be achieved by introducing an RS485 communication chip, such as... Figure 4 As shown, the first peripheral circuit includes an isolator LC2 connected on one side to the fourth communication chip U4, and the other side of the isolator LC2 connected to the RS485 communication serial port, with a thirtieth resistor R30 connected between the two wires. The two wires of the RS485 communication serial port are grounded through transient suppression diodes TD1 and TD2, respectively. Considering that the RS485 communication chip uses differential low-voltage transmission, and electromagnetic interference from devices such as equipment and power distribution modules in the cabinet is a concern, it is necessary to use an isolator and transient suppression diodes to eliminate the electromagnetic influence of ground loops and protect the RS485 communication chip.

[0034] In one embodiment, the integration of RS232 communication can be achieved by introducing an RS232 communication chip, such as... Figure 5 As shown, due to the high voltage difference characteristic of the RS232 communication chip, it has a certain anti-interference capability. To simplify the circuit, an external protection circuit is not required.

[0035] In one embodiment, this design includes eight dry contact inputs for detecting the on / off states of components such as heat sinks and power switches. Figure 7 As shown, the processor chip U10 can be connected to the positive terminal of a Schottky diode D3 through its intrusion detection interface. The negative terminal of the Schottky diode D3 is connected to an external dry contact input terminal. The positive terminal of the Schottky diode D3 is also connected to a 3.3V voltage through a resistor R139 and grounded through a capacitor C72.

[0036] In one embodiment, this design includes eight dry contact outputs for controlling the opening and closing of components such as heat sinks and power switches. Figure 8 As shown, specifically, the gate (G) of the seventh NMOS transistor Q7 can be connected through the GPIO port of the processor chip U10 via resistor R123. The source (S) of the seventh NMOS transistor Q7 is grounded, and the drain (D) of the seventh NMOS transistor Q7 is connected to the release voltage terminal V through the first diode RD1. Rel The first diode RD1 is connected in parallel with a relay J1. One side of the coil of the relay J1 is connected to the two ends of the first diode RD1, and the other side of the coil of the relay J1 is connected to an external dry contact output terminal. The dry contact input and output design used in this invention will not cause electromagnetic interference, avoiding the use of induction coils to detect the continuity of electrical circuits and increasing additional electromagnetic interference.

[0037] In one embodiment, this design incorporates 8-channel ADC signal acquisition, primarily for signal transmission from various sensors, with each sensor's output connected to a corresponding ADC interface; the fifth peripheral circuit includes multiple ADC conversion lines, each ADC conversion line as follows... Figure 9 As shown, the ADC conversion circuit includes a ninth amplifier U9A. The non-inverting input of the ninth amplifier U9A is connected to an ADC interface through a sixty-seventh resistor R67. The non-inverting input of the ninth amplifier U9A is grounded through a forty-fifth capacitor C45 and connected to a 3.3V voltage through a sixty-third resistor R63. The forty-fifth capacitor C45 is connected in parallel with a ninety-fifth resistor R95. The inverting input of the ninth amplifier U9A is grounded through a ninety-ninth resistor R99. The output of the ninth amplifier U9A is connected to the ninety-ninth resistor R99 through a ninety-first resistor R91. The output of the ninth amplifier U9A is connected to the first group of analog input pins of the processor chip U10. Considering integration, the amplifier in each ADC conversion circuit can be an ADC dual op-amp amplifier chip such as the LM358 / TL082, and the two ADC conversion circuits share a single chip.

[0038] To address the power requirements of various chips and peripheral circuits, the control board also includes a step-down module. This module includes an SCT2432STER model step-down converter chip U6 that converts the power supply voltage to 5V. Figure 12 As shown; and the LM1117MPX-3.3 power management chip U7, which performs a 3.3V voltage conversion from 5V, as shown. Figure 13 As shown. Considering the voltage and current fluctuations output by the power distribution module, voltage stabilization and isolation are performed before step-down, such as... Figure 10 , Figure 11 As shown.

[0039] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. An environmental control cabinet, characterized in that: It includes a cabinet, a power distribution module, a heat dissipation assembly, a sensor group, and a control box; the front and rear doors of the cabinet are provided with an array of perforated heat dissipation holes; the power distribution module is installed in the cabinet and provides a power supply interface for connecting to an external power source; the heat dissipation assembly is embedded in the cabinet door; and the sensor group includes multiple sensors arranged inside the cabinet. The control box includes a chassis and a control board inside the chassis. The chassis is mounted in a cabinet via a bracket. The control board includes an AT32F407 series processor chip (U10). The first UART interface of the processor chip (U10) is connected to a fourth communication chip (U4) of model SIT3485ESA and a first peripheral circuit to provide an RS485 communication serial port. The second UART interface of the processor chip (U10) is connected to a third communication chip (U3) of model D3232 to provide an RS232 communication serial port. The first RMII interface of the processor chip (U10) is connected to a radio frequency signal processing chip and a third peripheral circuit to provide an ETH communication serial port. The third UART interface of the processor chip (U10) is connected to a first communication chip (U1) of model RTL8201F-VB-CG and a fourth peripheral circuit to provide a 4G communication interface. The first set of analog input pins of the processor chip (U10) is connected to a fifth peripheral circuit to provide multiple ADC interfaces for sensors.

2. The environmental control cabinet according to claim 1, characterized in that: The MDIO pin of the first communication chip (U1) is connected to the PA2 pin of the processor chip (U10), and the MDC pin of the first communication chip (U1) is connected to the PC1 pin of the processor chip (U10). The CRS / CES_DV pin, TXC pin, TXEN pin, TXDO pin, TXD1 pin, RXDO pin, and RXD1 pin of the first communication chip (U1) are connected to the PA7 pin, PA1 pin, PB11 pin, PB12 pin, PB13 pin, PC4 pin, and PC5 pin of the processor chip (U10) in sequence. A signal transformer (T1) of model H1102NLT is connected between the MDI pin of the first communication chip (U1) and the 4G communication interface.

3. An environmental control cabinet according to claim 2, characterized in that: The first peripheral circuit includes an isolator (LC2) connected on one side to the fourth communication chip (U4), and the other side of the isolator (LC2) is connected to the RS485 communication serial port, with a thirtieth resistor (R30) connected between the two wires. The two wires of the RS485 communication serial port are respectively grounded through a transient suppression diode.

4. An environmental control cabinet according to claim 1, characterized in that: The intrusion detection interface of the processor chip (U10) is connected to the positive terminal of a Schottky diode (D3). The negative terminal of the Schottky diode (D3) is connected to an external dry contact input terminal. The positive terminal of the Schottky diode (D3) is also connected to a 3.3V voltage through a resistor and grounded through a capacitor.

5. An environmental control cabinet according to claim 4, characterized in that: The GPIO port of the processor chip (U10) is connected to the gate (G) of the seventh NMOS transistor (Q7) through a resistor. The source (S) of the seventh NMOS transistor (Q7) is grounded, and the drain (D) of the seventh NMOS transistor (Q7) is connected to the release voltage terminal V through the first diode (RD1). Rel The first diode (RD1) is connected in parallel with a relay (J1). One side of the coil of the relay (J1) is connected to the two ends of the first diode (RD1), and the other side of the coil of the relay (J1) is connected to an external dry contact output terminal.

6. An environmental control cabinet according to claim 1, characterized in that: The sensor group includes a humidity sensor, a temperature sensor distributed at multiple points inside the cabinet, a smoke sensor, and a water immersion sensor. The output of each sensor is connected to an ADC interface. The fifth peripheral circuit includes a multi-channel ADC conversion circuit, which includes a ninth amplifier (U9A). The non-inverting input of the ninth amplifier (U9A) is connected to an ADC interface through a sixty-seventh resistor (R67). The non-inverting input of the ninth amplifier (U9A) is grounded through a forty-fifth capacitor (C45) and connected to a 3.3V voltage through a sixty-third resistor (R63). The forty-fifth capacitor (C45) is connected in parallel with a ninety-fifth resistor (R95). The inverting input of the ninth amplifier (U9A) is grounded through a ninety-ninth resistor (R99). The output of the ninth amplifier (U9A) is connected to the ninety-ninth resistor (R99) through a ninety-first resistor (R91). The output of the ninth amplifier (U9A) is connected to the first set of analog input pins of the processor chip (U10).

7. An environmental control cabinet according to claim 1, characterized in that: The control board also includes a step-down module, which includes an SCT2432STER step-down converter chip (U6) that converts the power supply to 5V, and an LM1117MPX-3.3 power management chip (U7) that converts the 5V voltage to 3.3V.

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