Internet of Things expansion control device for refrigerator

Abstract

The utility model discloses an internet-of-things expansion control device for a refrigerator, which comprises the refrigerator, a control box is arranged in the refrigerator, an internet-of-things communication board and a control circuit board are arranged in the control box, a controller and a serial port are arranged on the control circuit board, the controller is electrically connected with the internet-of-things communication board through the serial port, and the internet-of-things communication board is electrically connected with the control circuit board through the serial port. A hardware basis is provided for data acquisition and remote control of the refrigerator, and the system has the characteristics of simple transformation, stability and reliability.

Description

Technical Field

[0001] This utility model belongs to the field of freezer technology, specifically relating to a physical network extension control device for freezers. Background Technology

[0002] The refrigerated display cases placed in stores are usually refrigeration equipment provided by beverage manufacturers to merchants. Beverage manufacturers monitor the use of these display cases. Currently, the use of these display cases is checked by manual store visits to see if they have been moved, if they are in use, or if other products have been placed on them. This manual store visit method is labor-intensive and inefficient. Moreover, the controllers on the existing display cases do not have network connectivity, making it impossible to collect and monitor the display case data in real time. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a physical network extension control device for freezers.

[0004] The specific plan is as follows:

[0005] An IoT extended control device for a freezer includes a freezer, a control box inside the freezer, an IoT communication board and a control circuit board inside the control box, a controller and a serial port on the control circuit board, and the controller is electrically connected to the IoT communication board through the serial port.

[0006] The IoT communication board is a LoRa module, the serial port is an RS485 serial port, and the controller is a microcontroller.

[0007] The control box includes a box body and a box cover. Screw mounting holes are provided at corresponding positions on the box body and the box cover. The box cover is detachably connected to the box body through the screw mounting holes.

[0008] The control circuit board is fixed inside the housing. The housing is provided with an input interface and an output interface. The control circuit board is provided with an input terminal block. The input interface is electrically connected to the input terminal block. The serial port is electrically connected to the output interface.

[0009] An auxiliary fixing strip is provided on the inner side of the box cover. Both ends of the auxiliary fixing strip are provided with through holes. The auxiliary fixing strip is fixedly connected to the inner wall of the box cover. The Internet of Things communication board is fixed to the inner side of the box cover through the auxiliary fixing strip.

[0010] The IoT communication board is equipped with an adapter terminal, which is electrically connected to the serial port.

[0011] The control circuit board is also equipped with a step-down voltage regulator module. The input terminal is electrically connected to the step-down voltage regulator module. The step-down voltage regulator module includes a step-down transformer, a bridge rectifier circuit, and a three-terminal voltage regulator. The input terminal is electrically connected to the step-down transformer, and the step-down transformer is electrically connected to the three-terminal voltage regulator through the bridge rectifier circuit.

[0012] This utility model discloses an Internet of Things (IoT) extension control device for freezers. By extending the IoT communication board through a serial port in the control box of the freezer, the traditional freezer is given network connectivity, providing a hardware foundation for the collection of freezer data and remote control. It features simple modification and stable reliability. Attached Figure Description

[0013] Figure 1 This is a structural diagram of a freezer.

[0014] Figure 2 This is a schematic diagram of the internal structure of the box.

[0015] Figure 3 This is a structural diagram of the box lid.

[0016] Figure 4 This is a structural diagram of the auxiliary fixing strip.

[0017] Figure 5 This is a schematic diagram of the electrical connection structure of this utility model.

[0018] Figure 6 This is a schematic diagram of the circuit structure of a step-down voltage regulator module. Detailed Implementation

[0019] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the implementation of this utility model, not all of it. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0020] like Figures 1 to 2 As shown, an IoT extended control device for a freezer includes a freezer 1, a control box 2 inside the freezer 1, an IoT communication board 13 and a control circuit board 5 inside the control box 2, a controller 10 and a serial port 7 on the control circuit board 5, and the controller 10 is electrically connected to the IoT communication board 13 through the serial port 7.

[0021] The IoT communication board 13 is a LoRa module, the serial port 7 is an RS485 serial port, and the controller 10 is a microcontroller.

[0022] LoRa stands for "Long Range," and LoRa technology is a wireless communication technology that uses radio waves for long-distance data transmission. Based on patented technology developed by Semtech, LoRa achieves efficient, low-power communication over a wide area through a unique spread spectrum modulation method.

[0023] The primary function of a LoRa module is to provide low-power, high-efficiency data communication services over a wide geographical area. Specifically, it can achieve the following goals:

[0024] Long-distance communication: capable of covering distances of several kilometers to tens of kilometers, suitable for large-scale monitoring and control applications.

[0025] Low power consumption design: Enables long-term operation even when powered by battery, making it particularly suitable for devices that are difficult to replace power sources frequently.

[0026] High network capacity: Supports the access of a large number of devices, meeting the needs of large-scale IoT deployment.

[0027] Strong anti-interference capability: It can maintain communication stability even in noisy environments.

[0028] RS-485 is commonly used in industrial automation, supporting reliable serial data communication over long distances. Furthermore, RS-485 uses differential signal transmission, effectively resisting electromagnetic interference and making it suitable for long-distance communication in noisy environments. RS485 typically uses half-duplex mode, meaning data can only be transmitted in one direction at a time, supporting up to 32 devices communicating on the same bus.

[0029] In this embodiment, the traditional freezer controller is equipped with network connectivity through the IoT communication board 13. The freezer data can be wirelessly transmitted to the server 16 through the IoT communication board 13, providing a basis for the server 16 to collect data and remotely control the freezer. The freezer data shown includes the internal temperature data and the freezer's location information.

[0030] like Figures 2 to 3 As shown, the control box 2 includes a box body 6 and a box cover 14. Screw mounting holes 9 are provided at corresponding positions on the box body 6 and the box cover 14. The box cover 14 is detachably connected to the box body 6 through the screw mounting holes 9.

[0031] The control circuit board 5 is fixed inside the housing 6. The housing 6 is provided with an input interface 3 and an output interface 8. The control circuit board 5 is provided with an input terminal block 4. The input interface 3 is electrically connected to the input terminal block 4. The serial port 7 is electrically connected to the output interface 8.

[0032] The input interface 3 provides power to the control circuit board 5, and the output interface 8 is used to control the control circuit board 5 to control external devices, such as temperature acquisition. In this embodiment, temperature acquisition is performed through the serial port 7, that is, the serial port 7 is electrically connected to the external temperature sensor through the output interface 8 so as to transmit the acquired temperature value to the controller 10.

[0033] like Figures 3 to 4 As shown, an auxiliary fixing strip 15 is provided on the inner side of the box cover 14. Both ends of the auxiliary fixing strip 15 are provided with through holes. The auxiliary fixing strip 15 is fixedly connected to the inner wall of the box cover 14. The Internet of Things communication board 13 is fixed to the inner side of the box cover 14 through the auxiliary fixing strip 15.

[0034] In this embodiment, the IoT communication board 13 shown can be glued to the inside of the box cover 14. In order to ensure the stability of the IoT communication board 13 inside the box cover 14, an auxiliary fixing strip 15 is added, which can further press the IoT communication board 13. The auxiliary fixing strip 15 is a plastic strip.

[0035] The IoT communication board 13 is provided with an adapter terminal 12, which is electrically connected to the serial port 7.

[0036] like Figures 2 to 3 As shown, the wiring sequence of the serial port 7 is power cable VCC, 485+ cable, 485- cable and GND cable. The wiring sequence of the adapter terminal 12 is also VCC, 485+ cable, 485- cable and GND cable. After connecting the cables with the same number, the Internet of Things expansion function of the freezer controller can be realized.

[0037] like Figure 2 , Figures 5 to 6 As shown, the control circuit board 5 is also provided with a step-down voltage regulator module 11. The input terminal 4 is electrically connected to the step-down voltage regulator module 11. The step-down voltage regulator module 11 includes a step-down transformer 17, a bridge rectifier circuit 18 and a three-terminal voltage regulator 19. The input terminal 4 is electrically connected to the step-down transformer 17. The step-down transformer 17 is electrically connected to the three-terminal voltage regulator 19 through the bridge rectifier circuit 18.

[0038] In this embodiment, the step-down voltage regulator module 11 converts the externally input voltage into a voltage value suitable for the controller's operation, ensuring the normal operation of the controller.

[0039] The specific installation process for the physical network extension control device for the freezer is as follows:

[0040] Remove the control box 2 at the bottom of the freezer 1 from the freezer. Then, open the box cover 14, attach the IoT communication board 13 to the box cover 14, and press the IoT communication board 13 with the auxiliary fixing strip 15. At the same time, fix the auxiliary fixing strip 15 to the box cover 14 with screws at both ends.

[0041] Four cables are then led out from the serial port 7 inside the box 6 using a soldering machine. The wiring sequence of the four cables is VCC, 485+, 485-, and GND. After connecting the cables with the same markings to the IoT communication board 13, the IoT expansion function of the freezer controller can be realized.

[0042] Then, the lid 14 was fixed to the body 6 with screws, and the control box 2 was installed at the bottom of the freezer 1, completing the installation of the Internet of Things extended control device.

[0043] Finally, by configuring the Internet of Things to enable remote connection between server 16 and freezer 1, a hardware foundation is provided for the collection and remote control of freezer data, which is characterized by simple modification and stable reliability.

[0044] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. An Internet of Things (IoT) extended control device for a freezer, characterized in that: Includes a freezer (1), a control box (2) is provided inside the freezer (1), an Internet of Things communication board (13) and a control circuit board (5) are provided inside the control box (2), a controller (10) and a serial port (7) are provided on the control circuit board (5), and the controller (10) is electrically connected to the Internet of Things communication board (13) through the serial port (7).

2. The IoT extended control device for a freezer according to claim 1, characterized in that: The IoT communication board (13) is a LoRa module, the serial port (7) is an RS485 serial port, and the controller (10) is a microcontroller.

3. The IoT extended control device for a freezer according to claim 1, characterized in that: The control box (2) includes a box body (6) and a box cover (14). Screw mounting holes (9) are provided at corresponding positions on the box body (6) and the box cover (14). The box cover (14) is detachably connected to the box body (6) through the screw mounting holes (9).

4. The IoT extended control device for a freezer according to claim 3, characterized in that: The control circuit board (5) is fixed inside the box (6). The box (6) is provided with an input interface (3) and an output interface (8). The control circuit board (5) is provided with an input terminal (4). The input interface (3) is electrically connected to the input terminal (4). The serial port (7) is electrically connected to the output interface (8).

5. The IoT extended control device for a freezer according to claim 4, characterized in that: An auxiliary fixing strip (15) is provided on the inner side of the box cover (14). Both ends of the auxiliary fixing strip (15) are provided with through holes. The auxiliary fixing strip (15) is fixedly connected to the inner wall of the box cover (14). The Internet of Things communication board (13) is fixed to the inner side of the box cover (14) through the auxiliary fixing strip (15).

6. The IoT extended control device for a freezer according to claim 5, characterized in that: The IoT communication board (13) is provided with an adapter terminal (12), which is electrically connected to the serial port (7).

7. The IoT extended control device for a freezer according to claim 4, characterized in that: The control circuit board (5) is also provided with a step-down voltage regulator module (11). The input terminal (4) is electrically connected to the step-down voltage regulator module (11). The step-down voltage regulator module (11) includes a step-down transformer (17), a bridge rectifier circuit (18), and a three-terminal voltage regulator (19). The input terminal (4) is electrically connected to the step-down transformer (17). The step-down transformer (17) is electrically connected to the three-terminal voltage regulator (19) through the bridge rectifier circuit (18).

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