A supermarket built-in refrigerator controller and control method

Abstract

The application discloses a built-in refrigerator controller and control method for supermarkets, wherein a temperature sensor is arranged near an evaporator, a detected temperature signal is used as a temperature regulation signal to control a fixed-frequency compressor, and the control method avoids the adverse effects of the temperature in the refrigerator on the compressor. In particular, a solid-state relay is arranged in a condensation-preventing heating wire circuit, and different condensation-preventing control methods are adopted according to the ambient temperature, so that the operation frequency of an electromagnetic valve is reduced, the service life of the electromagnetic valve is prolonged, and the energy-saving purpose is achieved. The application is provided with multiple channels, and can realize digital quantity input, upper computer cascading, and remote communication through an IOT template, so that quality monitoring is more convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to a refrigerator controller and control method, in particular to a supermarket built-in refrigerator controller and control method. BACKGROUND

[0002] The supermarket refrigerator is a refrigerator used for displaying goods in a supermarket, which has built-in and split types. The built-in refrigerator has a cabinet and a door, and is provided with a refrigerator controller, a compressor and other refrigeration systems connected with the controller, an evaporative fan, a temperature control probe, a refrigerant pipeline solenoid valve, a lighting lamp, a door magnetic switch installed between the cabinet and the door, etc. in the cabinet. The existing built-in refrigerator controller senses the temperature signal in the cabinet through the temperature control probe arranged in the cabinet, and controls the compressor to be turned on or off when the set upper and lower limits of temperature are reached. Since the temperature signal sensed by the temperature control probe in the cabinet changes greatly due to frequent opening of the door, the compressor is frequently operated, which directly affects the service life of the compressor and increases the use cost of the supermarket refrigerator. In addition, the existing refrigerator anti-condensation control mode only controls the electromagnetic relay connected with the anti-condensation heating wire, and the electromagnetic relay is also frequently operated with the change of condensation temperature, which not only reduces the service life of the electromagnetic valve, but also wastes electric energy. SUMMARY

[0003] The present application is to solve the above technical problems existing in the prior art, and provides a supermarket built-in refrigerator controller and control method.

[0004] The technical solution of the present application is: a supermarket built-in refrigerator controller has a printed circuit board, the printed circuit board is integrated with a main control board and a communication interface circuit, an RS485 communication interface circuit, a display interface circuit and a power input circuit connected with the main control board, and is also integrated with the following multiple channels connected with the main control board:

[0005] A temperature adjustment temperature signal input channel is used for inputting the signal of a temperature adjustment temperature sensor to the main control board;

[0006] A cabinet temperature signal input channel is used for inputting the signal of a cabinet temperature sensor to the main control board;

[0007] A defrosting temperature signal input channel is used for inputting the signal of a defrosting temperature sensor to the main control board;

[0008] A condensation temperature signal input channel is used for inputting the signal of a condensation temperature sensor to the main control board;

[0009] A door switch state signal input channel is used for inputting the signal of a door magnetic switch state to the main control board;

[0010] Defrosting synchronous input and output channel, used for inputting defrosting synchronous signal to the main control board or outputting defrosting synchronous signal from the main control board;

[0011] Anti-condensation solid-state relay regulating power output channel, used for outputting low-voltage direct-current power signal for regulating and anti-condensation solid-state relay connected with the heating wire;

[0012] Alarm signal output channel, used for outputting instruction signal for controlling alarm device;

[0013] Anti-condensation heating control signal output channel, used for outputting signal for controlling electromagnetic relay connected with the anti-condensation heating wire;

[0014] Illumination control signal output channel, used for outputting instruction signal for controlling illumination lamp in the cabinet;

[0015] Defrosting control signal output channel, used for outputting instruction signal for controlling defroster;

[0016] Evaporation fan control signal output channel, used for outputting instruction signal for controlling evaporation fan;

[0017] Fixed-frequency compressor control signal output channel, used for outputting instruction signal for controlling fixed-frequency compressor;

[0018] Analog output reserved channel, used for outputting 0-10V / 4-20mA analog signal;

[0019] Dimming power input channel, used for inputting power for adjusting illumination lamp brightness to the main control board;

[0020] Dimming control signal output channel, used for outputting control signal for adjusting illumination lamp brightness.

[0021] The preferred technical solution is that the main control board is connected with the IOT board through the communication interface circuit arranged on the printed circuit board.

[0022] The preferred technical solution is that the IOT template is an NB-IOT module, a LoRa module, a 4G module or a 5G module.

[0023] The preferred technical solution is that the IOT board communicates with the remote monitoring server, and the remote monitoring server communicates with the mobile / PC device end through the Internet network. A control method of the above-mentioned supermarket built-in refrigerator controller has four control modes for anti-condensation heating, which are as follows:

[0024] The first mode: the anti-condensation electromagnetic relay always works, and the solid-state relay does not work;

[0025] The second mode: the anti-condensation electromagnetic relay works according to the set period, and the heating time and the stopping time are determined by the anti-condensation heating working time parameter and the anti-condensation heating stopping time parameter respectively, and the solid-state relay does not work.

[0026] The third mode: the anti-condensation electromagnetic relay works all the time, and the solid-state relay works according to the set period, and the heating time and the stopping time are determined by the anti-condensation heating working time parameter and the anti-condensation heating stopping time parameter respectively.

[0027] The fourth mode: the anti-condensation heating is manually controlled, and when the main controller is in the unlocked state, the anti-condensation key is pressed to switch the anti-condensation heating state, and the anti-condensation electromagnetic relay and the anti-condensation solid-state relay work and stop at the same time.

[0028] The temperature sensor is arranged near the evaporator, the detected temperature signal is used as a temperature regulation signal to control the fixed-frequency compressor, and the adverse effects of the temperature in the cabinet on the compressor are avoided. In particular, the solid-state relay is arranged in the anti-condensation heating wire loop, and different anti-condensation control modes are adopted according to the ambient temperature and the like, so that the operation frequency of the electromagnetic valve can be reduced, the service life of the electromagnetic valve can be prolonged, and the energy-saving purpose can be achieved. The present application provides a plurality of channels, which can realize digital input, upper computer cascade and remote communication through IOT template, and quality monitoring is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of an embodiment of the present application. DETAILED DESCRIPTION

[0030] The commercial super-inbuilt refrigerator controller of the present application has the same structure as the prior art, that is, a plurality of inbuilt refrigerators, one main cabinet and a plurality of slave cabinets, and the controllers of the main cabinet and the slave cabinets are as shown in Figure 1 The printed circuit board is integrated with a main control board (MCU) and a communication interface circuit connected with the main control board, an RS485 communication interface circuit, a display interface circuit and a power input circuit. The RS485 communication interface circuit supports Modbus communication protocol, can realize data networking communication and upper computer cascade, the display interface circuit is used for connecting with the display, the display has a separate shell installation, contains an LED display unit, is used for displaying LOGO, temperature, humidity, energy consumption, time, setting and working state and the like, contains seven touch keys, is used for interactive input, and a built-in buzzer is used for alarm prompt and the like.

[0031] The printed circuit board is also integrated with the following multiple channels connected with the main control board:

[0032] Temperature signal input channel for inputting the signal of the temperature sensor to the main control board;

[0033] Cabinet temperature signal input channel for inputting the signal of the cabinet temperature sensor to the main control board;

[0034] Defrost temperature signal input channel for inputting the signal of the defrost temperature sensor to the main control board;

[0035] Condensation temperature signal input channel for inputting the signal of the condensation temperature sensor to the main control board;

[0036] Cabinet door switch state signal input channel for inputting the signal of the door magnetic switch state to the main control board;

[0037] Defrost synchronization input / output channel for inputting the defrost synchronization signal to the main control board or outputting the defrost synchronization signal by the main board; as the controller of the main cabinet, this channel is used for outputting the defrost synchronization signal, while as the controller of the slave cabinet, it is used for inputting the defrost synchronization signal to the main control board;

[0038] Anti-condensation solid-state relay regulated power output channel for outputting the low-voltage direct current (DC12V) power signal for regulating the solid-state relay connected with the anti-condensation heating wire;

[0039] Alarm signal output channel for outputting the instruction signal for controlling the alarm device;

[0040] Anti-condensation heating control signal output channel for outputting the signal for controlling the electromagnetic relay connected with the anti-condensation heating wire;

[0041] Illumination control signal output channel for outputting the instruction signal for controlling the cabinet illumination lamp;

[0042] Defrost control signal output channel for outputting the instruction signal for controlling the defroster;

[0043] Evaporation fan control signal output channel for outputting the instruction signal for controlling the evaporation fan;

[0044] Fixed-frequency compressor control signal output channel for outputting the instruction signal for controlling the fixed-frequency compressor;

[0045] Analog output reserved channel for outputting 0-10V / 4-20mA analog signal;

[0046] Dimming power input channel for inputting the power for adjusting the brightness of the illumination lamp to the main control board;

[0047] Dimming control signal output channel for outputting the control signal for adjusting the brightness of the illumination lamp.

[0048] The master control board is connected with the IOT board through a communication interface circuit arranged on the printed circuit board, the IOT template can be an NB-IOT module, a LoRa module, a 4G module or a 5G module, the IOT board communicates with a remote monitoring server, and the remote monitoring server communicates with a mobile / PC device end through an Internet network.

[0049] A control method of the above-mentioned supermarket built-in refrigerator controller, the anti-condensation heating has four control modes, which are as follows:

[0050] The first mode: the anti-condensation electromagnetic relay always works, and the solid-state relay does not work.

[0051] The second mode: the anti-condensation electromagnetic relay works according to a set period, and the heating time and the stopping time are determined by the anti-condensation heating working time parameter and the anti-condensation heating stopping time parameter respectively, and the solid-state relay does not work.

[0052] The third mode: the anti-condensation electromagnetic relay always works, and the solid-state relay works according to a set period, and the heating time and the stopping time are determined by the anti-condensation heating working time parameter and the anti-condensation heating stopping time parameter respectively.

[0053] The fourth mode: the anti-condensation heating is manually controlled, in the unlocked state of the master control, the anti-condensation key is pressed to switch the anti-condensation heating state, and the anti-condensation electromagnetic relay and the anti-condensation solid-state relay work and stop at the same time.

Claims

1. A control method for a built-in refrigerator controller in a supermarket, wherein the built-in refrigerator controller in a supermarket has a printed circuit board (PCB), on which a main control board and a communication interface circuit connected to the main control board, an RS485 communication interface circuit, a display interface circuit, and a power input circuit are integrated. The PCB also integrates the following multiple channels connected to the main control board: The temperature control temperature signal input channel is used to input the temperature control temperature sensor signal to the main control board; The cabinet temperature signal input channel is used to input the signal of the cabinet temperature sensor to the main control board; Defrost temperature signal input channel, used to input the defrost temperature sensor signal to the main control board; Condensing temperature signal input channel, used to input the signal of the condensing temperature sensor to the main control board; Cabinet door switch status signal input channel, used to input the door magnetic switch status signal to the main control board; Defrost synchronization input and output channel, used to input defrost synchronization signal to the main control board or output defrost synchronization signal from the main board; The anti-condensation solid-state relay regulates the power output channel, which is used to output the low-voltage DC power signal for regulating the solid-state relay connected to the anti-condensation heating wire; Alarm signal output channel, used to output command signals for controlling the alarm device; Anti-condensation heating control signal output channel, used to output the signal of the electromagnetic relay whose control contact is connected to the anti-condensation heating wire; Lighting control signal output channel, used to output command signals for the lighting in the control cabinet; Defrost control signal output channel, used to output the command signal for controlling the defroster; Evaporator fan control signal output channel, used to output the command signal for controlling the evaporator fan; Fixed-frequency compressor control signal output channel, used to output the command signal for controlling the fixed-frequency compressor; Analog output reserved channel for outputting 0-10V / 4-20mA analog signals; Dimming power input channel, used to input power to the main control board for adjusting the brightness of the lighting; Dimming control signal output channel, used to output control signals for adjusting the brightness of lighting lamps; It is characterized by four control modes for anti-condensation heating, as follows: The first mode: the anti-condensation electromagnetic relay is always working, and the solid-state relay is not working; The second mode: The anti-condensation electromagnetic relay works according to the set cycle. The heating time and stop time are determined by the set anti-condensation heating working time parameters and anti-condensation heating stop time parameters respectively. The solid-state relay does not work. The third mode: The anti-condensation electromagnetic relay works all the time, and the solid-state relay works according to the set cycle. The heating time and stop time are determined by the anti-condensation heating working time parameter and the anti-condensation heating stop time parameter respectively. The fourth mode: manual control of anti-condensation heating. When the main controller is unlocked, press the anti-condensation button to switch the anti-condensation heating state. The anti-condensation electromagnetic relay and anti-condensation solid-state relay work and stop at the same time.

2. The supermarket built-in refrigerator controller according to claim 1, characterized in that: The main control board is connected to the IOT board via a communication interface circuit arranged on the printed circuit board.

3. The supermarket built-in refrigerator controller according to claim 2, characterized in that: The IOT board is an NB-IOT module, a LoRa module, a 4G module or a 5G module.

4. The supermarket built-in refrigerator controller according to claim 3, characterized in that: The IOT board communicates with the remote monitoring server, and the remote monitoring server communicates with the mobile / PC device end through the Internet network.

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