Refrigerator synchronous control system

Abstract

The utility model discloses a refrigerator synchronous control system which comprises a master refrigerator and at least one slave refrigerator, a master control module and a synchronous communication module are arranged in the master refrigerator and each slave refrigerator, and the master control module is electrically connected with the synchronous communication module. The master control module in each slave refrigerator is in wireless communication connection with the master refrigerator through the corresponding synchronous communication module, hardware support is provided for synchronous control of the refrigerators, meanwhile, the wireless communication connection between the synchronous communication modules omits the wiring process, and the refrigerator has the advantage of being simple in structure.

Description

Technical Field

[0001] This utility model belongs to the field of freezer technology, specifically relating to a freezer synchronous control system. Background Technology

[0002] Existing supermarkets typically have multiple refrigerated display cases, each operating independently. After prolonged operation, each case requires defrosting. Due to the large number of cases, individual defrosting is time-consuming. Furthermore, the display cases in supermarkets have internal indicator lights. At the end of the business day, these lights must be turned off one by one to save energy. Turning off the indicator lights individually is also time-consuming, especially with a large number of cases. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a synchronous control system for freezers.

[0004] The specific plan is as follows:

[0005] A synchronous control system for a freezer includes a main freezer and at least one slave freezer. Each main freezer and each slave freezer is equipped with a main control module and a synchronous communication module. The main control module and the synchronous communication module are electrically connected. The main control module in each slave freezer is wirelessly connected to the main freezer through the synchronous communication module.

[0006] The main control module is equipped with a controller and an RS485 interface. The controller is electrically connected to the synchronous communication module through the RS interface.

[0007] The synchronous communication module is a LoRa module.

[0008] The main control module also includes a first control output interface, a second control output interface, buttons, a temperature display module, and a temperature acquisition interface, all of which are electrically connected to the controller.

[0009] The first control output interface is equipped with a first transistor Q1, a first relay and a fan. The first control output interface is connected to the first relay through the first transistor Q1, and the first relay is electrically connected to the fan.

[0010] The second control output interface is equipped with a second transistor Q2, a second relay, and a freezer display light. The second control output interface is electrically connected to the second relay through the second transistor Q2, and the second relay is electrically connected to the freezer display light.

[0011] A temperature sensor Rt is installed on the temperature acquisition interface, and the temperature sensor Rt is electrically connected to the temperature acquisition interface.

[0012] The temperature display module is an OLED display screen, and the temperature display module is electrically connected to the controller via an SPI interface.

[0013] This utility model discloses a synchronous control system for a freezer, including a main freezer and slave freezers. Each freezer is equipped with a synchronous communication module. The synchronous communication module of each slave freezer is wirelessly connected to the main freezer. Through the wireless synchronous communication module, the operating status of the freezers can be synchronized, providing hardware support for the synchronous control of the freezers. At the same time, the wireless communication connection between the synchronous communication modules eliminates the wiring process and has the advantage of simple structure. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a structural diagram of the main control module.

[0016] Figure 3 This is a schematic diagram of the circuit structure of the main control module and the synchronous communication module. Detailed Implementation

[0017] 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.

[0018] like Figure 1 As shown, a freezer synchronous control system includes a main freezer 1 and at least one slave freezer 2. Each main freezer 1 and each slave freezer 2 is equipped with a main control module 4 and a synchronous communication module 3. The main control module 4 and the synchronous communication module 3 are electrically connected. The main control module 4 in each slave freezer 2 is wirelessly connected to the main freezer 1 through the synchronous communication module 3.

[0019] In this embodiment, each secondary freezer 1 is wirelessly connected to the main freezer 1, so that the working status of any one freezer 1 can be synchronized to the main control module 2 of all freezers through the main freezer 1.

[0020] The main control module 4 is equipped with a controller 11 and an RS485 interface 5. The controller 11 is electrically connected to the synchronous communication module 3 through the RS485 interface 5.

[0021] 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.

[0022] like Figures 2 to 3 As shown, the synchronous communication module 3 is a LoRa module. 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 LoRa modules is to provide low-power, high-efficiency data communication services over a wide geographical area. Specifically, it can achieve the following goals: long-range communication: capable of covering distances of several kilometers to tens of kilometers, suitable for large-scale monitoring and control applications; low-power design: enabling long-term operation even under battery power, particularly suitable for devices where power supply is difficult to change frequently; high network capacity: supporting the connection of a large number of devices, meeting the needs of large-scale IoT deployments; strong anti-interference capability: maintaining communication stability even in noisy environments.

[0024] The main control module 4 also includes a first control output interface 10, a second control output interface 6, a button 7, a temperature display module 8, and a temperature acquisition interface 9. The first control output interface 10, the second control output interface 6, the button 7, the temperature display module 8, and the temperature acquisition interface 9 are electrically connected to the controller 11.

[0025] like Figure 3 As shown, the first control output interface 10 is provided with a first transistor Q1, a first relay 15 and a fan 12. The first control output interface 10 is connected to the first relay 15 through the first transistor Q1, and the first relay 15 is electrically connected to the fan 12.

[0026] The second control output interface 6 is equipped with a second transistor Q2, a second relay 13 and a freezer display light 14. The second control output interface 6 is electrically connected to the second relay 13 through the second transistor Q2, and the second relay 13 is electrically connected to the freezer display light 14.

[0027] In this embodiment, the internal structures of the first relay 15 and the second relay 13 are the same, both including a coil H, a common terminal com, a normally closed contact S1, and a normally open contact S2. For the first relay 15 and the second relay 13, when the coil H is not energized, the common terminal com is connected to the normally closed contact S1, and the common terminal com is not connected to the normally open contact S2. When the coil H is energized, due to the principle of electromagnetic induction, the relay will operate, causing the common terminal com to change from a connected state to an open state with the normally closed contact S1, and the common terminal com to change from an open state to a connected state with the normally open contact S2.

[0028] A temperature sensor Rt is provided on the temperature acquisition interface 9, and the temperature sensor Rt is electrically connected to the temperature acquisition interface 9.

[0029] The temperature display module 8 is an OLED display screen, and the temperature display module 8 is electrically connected to the controller 4 via an SPI interface.

[0030] The specific working process of the synchronous control system for the freezer shown is as follows:

[0031] like Figure 3 As shown, the temperature sensor Rt inside the freezer 1 can monitor the temperature inside the freezer 1 in real time. When the temperature reaches the preset temperature, the temperature sensor Rt will send a signal to the controller 11. After receiving the signal, the controller 11 will drive the first transistor Q1 to conduct. After the first transistor Q1 conducts, the coil of the first relay 15 will be energized.

[0032] When the coil H of the first relay 15 is energized, the connection between the common terminal com and the normally closed contact S1 changes from a conducting state to an open state, and the connection between the common terminal com and the normally open contact S2 changes from an open state to a conducting state. In other words, after the coil H of the first relay 15 is energized, the connection between the common terminal com and the normally open contact S2 is established. At this time, the 220V AC power supplies the fan 12 through the common terminal com and the normally open contact S2, causing the fan 12 to start working. The fan 12 circulates air and uses the fan 12 to defrost the freezer.

[0033] If any slave freezer 2 starts defrosting, the slave freezer 2 transmits the defrosting signal to the master freezer 1 through the synchronization communication module 3. The master freezer 1 then synchronizes the defrosting signal to all slave freezers 2 through the synchronization communication module 3. At this time, the master freezer 1 and all slave freezers 2 start to defrost synchronously. That is, each controller 4 in the master freezer 1 and slave freezers 2 causes the corresponding first relay 15 to activate, synchronously driving their respective fans 12 to start working, thus achieving synchronous defrosting.

[0034] If the freezer that starts defrosting is the main freezer 1, then the main freezer 1 will synchronize the defrosting signal to all the slave freezers 2 through the synchronous communication module 3. At this time, the main freezer 1 and all the slave freezers 2 will start to defrost synchronously. That is, each controller 4 in the main freezer 1 and the slave freezers 2 will cause the corresponding first relay 15 to act, synchronously driving their respective fans 12 to start working, thus achieving synchronous defrosting.

[0035] For those skilled in the art, a one-master-multiple-slave scheme is a common IoT communication mode in LoRa networking. A master device communicates with multiple slave devices via LoRa modules to transmit and receive data. The communication method between the master and slave devices is LoRa. The master typically uses an STM32F1 chip and an Aisinco Ra-02 RF chip, communicating via SPI.

[0036] At the end of the business day, the display lights 14 of each freezer need to be turned off synchronously. The specific process is as follows: press button 7 on the main freezer 1 or on any of the slave freezers. At this time, the button signal will be transmitted to the main control module 4 of the main freezer 1. The main control module 4 of the main freezer 1 sends the button signal to all slave freezers 2 through the synchronous communication module 3. After receiving the button signal, the main freezer 1 and each slave freezer 2 start to execute the button action to realize the synchronous turning off of the lights.

[0037] The specific process of controller 11 executing the button action is as follows: controller 11 sends a high-level signal to the second transistor Q2 through the second control output interface 6, so that the second transistor Q2 is turned on. After the second transistor Q2 is turned on, the coil H of the second relay 13 is energized, and then the second relay 13 is activated, so that the common terminal com of the second relay 13 and the normally open contact S2 change from open to closed, and the common terminal com of the second relay 13 and the normally closed contact S1 change from closed to open. Since the normally closed contact S1 is disconnected from the common terminal com, the refrigerator display light 14 is de-energized and turned off.

[0038] 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. A synchronous control system for a freezer, characterized in that: It includes a main freezer (1) and at least one slave freezer (2). The main freezer (1) and each slave freezer (2) are equipped with a main control module (4) and a synchronous communication module (3). The main control module (4) and the synchronous communication module (3) are electrically connected. The main control module (4) in each slave freezer (2) is wirelessly connected to the main freezer (1) through the synchronous communication module (3).

2. The freezer synchronous control system according to claim 1, characterized in that: The main control module (4) is equipped with a controller (11) and an RS485 interface (5). The controller (11) is electrically connected to the synchronous communication module (3) through the RS485 interface (5).

3. The freezer synchronous control system according to claim 1, characterized in that: The synchronous communication module (3) is a Lora module.

4. The refrigerator synchronous control system according to claim 2, characterized in that: The main control module (4) also includes a first control output interface (10), a second control output interface (6), a button (7), a temperature display module (8), and a temperature acquisition interface (9). The first control output interface (10), the second control output interface (6), the button (7), the temperature display module (8), and the temperature acquisition interface (9) are electrically connected to the uniform controller (11).

5. The refrigerator synchronous control system according to claim 4, characterized in that: The first control output interface (10) is provided with a first transistor (Q1), a first relay (15) and a fan (12). The first control output interface (10) is connected to the first relay (15) through the first transistor (Q1), and the first relay (15) is electrically connected to the fan (12).

6. The freezer synchronous control system according to claim 4, characterized in that: The second control output interface (6) is equipped with a second transistor (Q2), a second relay (13) and a freezer display light (14). The second control output interface (6) is electrically connected to the second relay (13) through the second transistor (Q2), and the second relay (13) is electrically connected to the freezer display light (14).

7. The freezer synchronous control system according to claim 4, characterized in that: A temperature sensor (Rt) is provided on the temperature acquisition interface (9), and the temperature sensor (Rt) is electrically connected to the temperature acquisition interface (9).

8. The refrigerator synchronous control system according to claim 4, characterized in that: The temperature display module (8) is an OLED display screen, and the temperature display module (8) is electrically connected to the controller (11) through the SPI interface.

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