Freezer glass door intelligent defrosting controller and glass door

Abstract

The utility model relates to a freezer glass door intelligent defrosting controller and a glass door. The freezer glass door intelligent defrosting controller comprises a power module and a main processor electrically connected with the power module. The main processor is electrically connected with an output control module, a sensor module, a display and a power adjusting module. The sensor module comprises a temperature and humidity detection sensor; the power supply module is connected with an external power supply through the two-position power switch; output belts of the two-position power switch are respectively connected with the output control module and are connected with the main processor through the zero-crossing signal processing module; the output control module is connected with a freezer door body heating film through the power adjusting module. And heating resistors are distributed in the freezer door body heating film. The device is reasonable in design, compact in structure and convenient to use.

Description

Technical Field

[0001] The utility model relates to an intelligent defrosting controller for a freezer glass door and the freezer glass door, and relates to multifunctional equipment integrating temperature and humidity detection and power output regulation. Background Art

[0002] At present, the main features of the existing heating controller are: 1. Heating method: adopting the resistance-capacitance voltage reduction method, using a fixed voltage to control heating. 2. Heating time: As long as the power is turned on, heating will occur, without start-stop and logic control. The existing products have two disadvantages. First, no matter how the temperature and humidity of the environment change, the heating voltage is always constant, and the heating power cannot be adjusted according to the humidity change, resulting in energy waste; second, the heating time is too long. As long as there is electricity, heating will continue. When the temperature is low and the humidity is low, the heating cannot be stopped, which not only wastes electricity, but also shortens the product life. Utility Model Content

[0003] The technical problem to be solved by the utility model is generally to provide an intelligent defrosting controller for a freezer glass door.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is:

[0005] In order to achieve effective defrosting, a refrigerator glass door intelligent defrosting controller includes a power module and a main processor electrically connected to the power module;

[0006] The main processor is electrically connected to the output control module, the sensor module, the display and the power regulation module respectively;

[0007] The sensor module includes a temperature and humidity detection sensor;

[0008] The power module is connected to an external power supply through a two-position power switch; the output bands of the two-position power switch are respectively connected to the output control module and connected to the main processor through the zero-crossing signal processing module;

[0009] The output control module is connected to the refrigerator door heating film through the power regulation module;

[0010] Heating resistors are distributed in the heating film of the freezer door.

[0011] As a further improvement of the above technical solution:

[0012] In order to achieve specific control, the display uses digital tube LS2; the main processor uses driver chip U13;

[0013] The driver chip U13 is equipped with resistors R1, R2, R3, R4, R5, R62, capacitors C25, C24, E1, E7, E8, interface JP7 and;

[0014] The driver chip U13 is electrically connected to the digital tube LS2;

[0015] In the driver chip U13, pin 10 is connected to a 5V power supply, and pin 10 is grounded through a capacitor C25 and E8 in parallel; pin 3 and pin 2 are connected to interface JP7;

[0016] The interface JP7 pin 2 is connected to the heating indicator LED3 and JRZS respectively, pin 8 is connected to +5V in one way, and the second way is connected to resistor R62 through resistor R62; the third way of pin 8 is connected to pin 1 of humidity sensor DHT11 through resistor R5 and the fourth way is grounded through capacitor E1; pin 2 is connected to resistors R1 and R3 respectively, pin 3 is connected to R2 and R4 respectively, and resistors R1 and R2 are connected to pin 1 together; resistor R3 is connected to driver chip U13 through SCL; resistor R2 is connected to driver chip U13 through SDA.

[0017] In order to achieve reasonable installation, the circuit board of the main processor is installed on the lower side of the freezer glass door; the temperature and humidity detection sensor is installed on the front panel of the glass door.

[0018] In order to realize indication monitoring, the refrigerator door heating film is electrically connected with a heating indicator light LED3.

[0019] A freezer glass door comprises the above-mentioned controller.

[0020] The utility model solves the problems of the original control mode, high energy consumption in the process, unintelligent start and stop, etc.; it greatly reduces energy consumption, thereby saving the use cost for users and extending the service life of the product.

[0021] The utility model has the advantages of reasonable design, low cost, firmness and durability, safety and reliability, simple operation, time-saving, labor-saving, money-saving, compact structure and convenient use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The utility model is a circuit diagram of a circuit board.

[0023] Figure 2 It is a circuit diagram of a power regulation module of the utility model.

[0024] Figure 3 It is a circuit diagram of a logic control device of the utility model.

[0025] Figure 4 It is a block diagram of the utility model. DETAILED DESCRIPTION

[0026] like Figure 1-4 As shown, the refrigerator glass door intelligent defrosting controller of this embodiment mainly includes a power module and a main processor electrically connected to the power module;

[0027] The main processor is electrically connected to the output control module, the sensor module, the display and the power regulation module; the sensor module includes a temperature and humidity detection sensor; the display uses a digital tube LS2;

[0028] The power module is connected to an external power supply through a two-position power switch; the output bands of the two-position power switch are respectively connected to the output control module and connected to the main processor through the zero-crossing signal processing module;

[0029] The output control module is connected to the refrigerator door heating film through the power regulation module;

[0030] The refrigerator door heating film is electrically connected to a heating indicator LED3;

[0031] Heating resistors are distributed in the heating film of the freezer door;

[0032] The main processor uses driver chip U13;

[0033] The driver chip U13 is equipped with resistors R1, R2, R3, R4, R5, R62, capacitors C25, C24, E1, E7, E8. Interface JP7 and;

[0034] The driver chip U13 is electrically connected to the digital tube LS2;

[0035] In the driver chip U13, pin 10 is connected to a 5V power supply, and pin 10 is grounded through a capacitor C25 and E8 in parallel; pin 3 and pin 2 are connected to interface JP7;

[0036] The interface JP7 pin 2 is connected to the heating indicator LED3 and JRZS respectively, the pin 8 is connected to +5V in one way, and the second way is connected to the resistor R62 through the resistor R62; the third way of the pin 8 is connected to the pin 1 of the humidity sensor DHT11 through the resistor R5 and the fourth way is grounded through the capacitor E1; the pin 2 is connected to the resistors R1 and R3 respectively, the pin 3 is connected to R2 and R4 respectively, and the resistors R1 and R2 are connected to the pin 1 together; the resistor R3 is connected to the driver chip U13 through SCL; the resistor R2 is connected to the driver chip U13 through SDA;

[0037] The circuit board assembly carrying the driver chip U13 is as follows Figure 1 As shown, it mainly consists of 0.36-inch digital tube LS2, driver chip TW1652, temperature and humidity sensor DHT11 and corresponding resistor and capacitor connectors. The circuit board is installed on the lower side of the cabinet glass door, and mainly includes temperature and humidity detection sensors, digital tube display, heating indicator light, single-handle double-pole power switch (when the temperature is low and there is no frost, the user can also turn off the power switch to achieve zero energy consumption); the temperature and humidity detection sensor is installed on the front panel, mainly to detect the actual environmental parameters outside the cabinet. When working, the CPU collects temperature and humidity data through the IIC signal line, and then writes the temperature and humidity data to be displayed through the SPI data line.

[0038] like Figure 2 The driver chip U13 is electrically connected to the power regulation module, which includes an interface JP5, a driver optical coupler U6, a bidirectional thyristor T3, a relay K2A, resistors R45, R48 and a transistor Q4; a zero-crossing signal processing module,

[0039] One end of the resistor R45 is connected to the driver chip U13 through PWM and the other end is connected to the resistor R48 and the base of the transistor Q4 respectively;

[0040] The emitter of transistor Q4 and resistor R48 are grounded, and the collector of transistor Q4 is connected to pin 2 of the driving optical coupler U6;

[0041] The driver optocoupler U6 is connected to +5V through resistor R43, pin 6 is connected to resistor R42, and pin 4 is connected to bidirectional thyristor T3 and resistor R46 respectively;

[0042] The resistor R46 is connected to the capacitor C16 and the bidirectional thyristor T3 respectively;

[0043] Interface JP5 is electrically connected to pins 1 and 3 of relay K2A. Pin 2 of relay K2A is divided into three paths, one of which is connected to capacitor C16, the second to bidirectional thyristor T3, and the third to resistor R42.

[0044] The control coil of relay K2A and diode D9 are connected in parallel between +5V and the collector of transistor Q3, and the base of transistor Q3 is grounded through resistor R47 and the emitter is grounded;

[0045] When the optocoupler U6 is driven to drive PWM to turn on, thereby realizing the conduction of transistor Q4, the optocoupler U6 is turned on, and a trigger signal with different pulse widths is output at the fourth pin of the optocoupler and added to the trigger pin of the thyristor T3. According to the parameters of the external environment, the corresponding AC voltage is output.

[0046] The zero-crossing signal processing module includes resistors R49-R56 and an optocoupler U7;

[0047] The resistors R49-R54, R56, R58-62 connected in series have one end connected to the L terminal and the other end connected to the pin 1 of the optocoupler U7. A diode D10 is connected between the pins 1 and 2 of the optocoupler U7. The pin 3 of the optocoupler U7 is grounded, and the pin 4 is connected to +5V through the resistor R55 and to the GL-XH of the driver chip U13 through the resistor R57.

[0048] GL-XH is grounded through capacitor C17;

[0049] The AC current signal is stepped down and limited by these 12 series resistors, causing the light-emitting diode inside the optocoupler U7 to light up and turn off periodically. A zero-crossing pulse with a period of 50HZ is formed on its fourth pin and sent to the zero-crossing sampling port of the logic chip.

[0050] The circuit board of the power regulation module is composed as follows Figure 2 As shown in the figure, it mainly consists of a bidirectional thyristor SRC / BTA12-600CB and its corresponding driving optical coupler MOC3052, and a zero-crossing signal processing module, which is composed of a voltage-dropping resistor R49-R56 and an optical coupler EL817 U7. This system abandons the original RC voltage-dropping circuit and adopts a new voltage regulator to collect the zero-crossing signal of the power supply, combine the real-time parameters of the external environment, generate a PWM voltage control signal, and use the PID process algorithm to realize the automatic adjustment of the size of the heating power. When it is detected that the parameter is less than the set parameter, PWN becomes zero level, and then the output relay is disconnected to achieve further energy saving.

[0051] like Figure 3 As shown: the driver chip U13 is electrically connected to a dual-position power switch; the dual-position power switch includes chips U8, U9 and an associated resistance-capacitance circuit;

[0052] The auxiliary resistance-capacitance circuit includes capacitors C18-20, diodes D11-13, capacitors E6-9, resistors R63-66, inductor L5, and transformer T4;

[0053] After the input power passes through the chip DB2, it is filtered by the inductor L5, the resistor R63, the diodes E6 and E7 and then output to the transformer T4; the pins 1 and 2 of the transformer T4 are electrically connected through the diode D12 and then through the parallel capacitor C18 and the resistor R64;

[0054] Pins 3 and 4 of the transformer T4 are electrically connected to the chip U9, and pins 5 and 6 of the chip U9 are grounded;

[0055] In chip U9, pin 1 is grounded through resistor R76, pin 2 is divided into three paths, one path is grounded through capacitor C19, the second path is grounded through resistor R75, and the third path is connected to pin 3 of transformer T4 through parallel resistors R72 and 73; pin 3 is grounded through capacitor C20, and pins 7 and 8 are connected to pin 1 of transformer T4; pin 4 is divided into two paths, one path is grounded through capacitor E9 and the other path is connected to pin 3 of transformer T4 through resistor R70 and diode D13;

[0056] After passing through diode D11, pin 5 of transformer T4 is divided into three paths, one path is grounded through capacitor E8, the second path is grounded through resistor R66, and the third path is connected to chip U8, which is connected to driver chip U13; pin 8 is grounded;

[0057] The logic control device circuit is composed of Figure 3As shown: The dual-position power switch is mainly composed of the U9 / SM7505 green energy switch circuit control chip and the attached resistance and capacitance circuit. Its input power range is 80-260VAC, 50 / 60HZ compatible, and the output is 5VDC to power this controller system. The AC power supplied by the city power passes through the rectifier bridge to obtain a high-voltage DC power of about 310V, which is added to the high-frequency transformer and connected to the ground through the switch chip to form an alternating magnetic field in the high-frequency transformer. Then, through the secondary coil and the rectifier filter circuit connected to it, a stable 5V DC power is obtained; the CPU module adopts the advanced model C61F23 that is domestically produced and compatible with foreign countries, with strong adaptability and stability. The control logic is as follows: when the temperature and humidity values ​​of the heating dew point are collected, the output relay is turned on first, and the zero-crossing signal is obtained from the optical coupler EL817. Through PID calculation, the conduction angle data of the SRC (T3) thyristor is obtained. The delay trigger pulse formed is added to the input end of the thyristor dedicated trigger MOC3052, and then added to the thyristor through the current limiting resistor R. AC4-48V AC is obtained at the output end of the thyristor and added to the cabinet door heating film. The thyristor has a high-power radiator, thereby ensuring the stability and reliability of this system.

[0058] The control process of the utility model is that when the system detects that the temperature and humidity of the external environment have reached the value that can produce dew point (humidity is tentatively set at 40RH), the controller turns on the relay module (generally, when the cabinet door does not need to be heated, the cabinet door is not powered on, and the neutral wire and the live wire are both in a double disconnected state, thereby reducing the risk of electric shock to personnel), turns on the voltage regulating device, and automatically adjusts the size of the heating voltage output after calculating the control data. During the working process, the temperature and humidity parameters are collected in real time, and the heating power is controlled according to the PID algorithm. When a value less than the dew point is detected, the power output is cut off, and there is basically no energy consumption during the time when dew cannot be produced in winter and spring.

[0059] This system adds a 0.4-inch high three-digit digital tube to realize the real-time display of temperature and humidity, and also adds a 5MM diameter red light-emitting diode to indicate whether the heating status is output. The MCU outputs PWM pulses to steplessly adjust the heating voltage. It comes with a two-position power switch (input range 85VAC-260VAC / 50-60HZ), which meets the electricity usage regulations of most countries.

[0060] The present invention is fully described for a clearer disclosure, and the prior art will not be listed one by one.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it; although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein with equivalents; it is obvious for those skilled in the art to combine multiple technical solutions of the utility model. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. An intelligent defrosting controller for a freezer glass door, characterized in that: It includes a power module and a main processor electrically connected to the power module; The main processor is electrically connected to the output control module, the sensor module, the display and the power regulation module respectively; The sensor module includes a temperature and humidity detection sensor; The power module is connected to an external power supply through a two-position power switch; the output bands of the two-position power switch are respectively connected to the output control module and connected to the main processor through the zero-crossing signal processing module; The output control module is connected to the refrigerator door heating film through the power regulation module; Heating resistors are distributed in the heating film of the freezer door.

2. The intelligent defrosting controller for a freezer glass door according to claim 1, characterized in that: The display uses digital tube LS2; the main processor uses driver chip U13; The driver chip U13 is equipped with resistors R1, R2, R3, R4, R5, R62, capacitors C25, C24, E1, E7, E8, interface JP7 and; The driver chip U13 is electrically connected to the digital tube LS2; In the driver chip U13, pin 10 is connected to a 5V power supply, and pin 10 is grounded through a capacitor C25 and E8 in parallel; pin 3 and pin 2 are connected to interface JP7; The interface JP7 pin 2 is connected to the heating indicator LED3 and JRZS respectively, and the pin 8 is connected to +5V in one way, and the second way is connected to resistor R62 through resistor R62; The third path of pin 8 is connected to pin 1 of humidity sensor DHT11 through resistor R5 and the fourth path is grounded through capacitor E1; pin 2 is connected to resistors R1 and R3 respectively, pin 3 is connected to R2 and R4 respectively, and resistors R1 and R2 are connected to pin 1 together; resistor R3 is connected to driver chip U13 through SCL; resistor R2 is connected to driver chip U13 through SDA.

3. The intelligent defrosting controller for a freezer glass door according to claim 1, characterized in that: The circuit board of the main processor is installed on the lower side of the glass door of the freezer; the temperature and humidity detection sensor is installed on the front panel of the glass door.

4. The intelligent defrosting controller for a freezer glass door according to claim 3, characterized in that: The refrigerator door heating film is electrically connected to a heating indicator light LED3.

5. The intelligent defrosting controller for a freezer glass door according to claim 3, characterized in that: The power regulation module includes interface JP5, driving optical coupler U6, bidirectional thyristor T3, relay K2A, resistors R45, R48 and transistor Q4; zero-crossing signal processing module, One end of the resistor R45 is connected to the driver chip U13 through PWM and the other end is connected to the resistor R48 and the base of the transistor Q4 respectively; The emitter of transistor Q4 and resistor R48 are grounded, and the collector of transistor Q4 is connected to pin 2 of the driving optical coupler U6; The driver optocoupler U6 is connected to +5V through resistor R43, pin 6 is connected to resistor R42, and pin 4 is connected to bidirectional thyristor T3 and resistor R46 respectively; The resistor R46 is connected to the capacitor C16 and the bidirectional thyristor T3 respectively; Interface JP5 is electrically connected to pins 1 and 3 of relay K2A. Pin 2 of relay K2A is divided into three paths, one of which is connected to capacitor C16, the second to bidirectional thyristor T3, and the third to resistor R42. The control coil of relay K2A and diode D9 are connected in parallel between +5V and the collector of transistor Q3, and the base of transistor Q3 is grounded through resistor R47 and the emitter is grounded.

6. The intelligent defrosting controller for a freezer glass door according to claim 5, characterized in that: The zero-crossing signal processing module includes resistors R49-R56 and an optocoupler U7; The resistors R49-R54, R56, and R58-62 are connected in series, one end is connected to the L terminal, and the other end is connected to the pin 1 of the optocoupler U7, and the diode D10 is connected between the pins 1 and 2 of the optocoupler U7; the pin 3 of the optocoupler U7 is grounded, and the pin 4 is connected to +5V through the resistor R55 and to the GL-XH of the driver chip U13 through the resistor R57; GL-XH is connected to ground via capacitor C17.

7. The intelligent defrosting controller for a freezer glass door according to claim 6, characterized in that: The dual-position power switch includes chips U8, U9 and associated resistance and capacitance circuits; The auxiliary resistance-capacitance circuit includes capacitors C18-20, diodes D11-13, capacitors E6-9, resistors R63-66, inductor L5, and transformer T4; After the input power passes through the chip DB2, it is filtered by the inductor L5, the resistor R63, the diodes E6 and E7 and then electrically connected to the transformer T4; the pins 1 and 2 of the transformer T4 are electrically connected through the diode D12 and then through the parallel capacitor C18 and the resistor R64; Pins 3 and 4 of the transformer T4 are electrically connected to the chip U9, and pins 5 and 6 of the chip U9 are grounded.

8. The intelligent defrosting controller for a freezer glass door according to claim 7, characterized in that: In chip U9, pin 1 is grounded through resistor R76, pin 2 is divided into three paths, one path is grounded through capacitor C19, the second path is grounded through resistor R75, and the third path is connected to pin 3 of transformer T4 through parallel resistors R72 and 73; pin 3 is grounded through capacitor C20, and pins 7 and 8 are connected to pin 1 of transformer T4; pin 4 is divided into two paths, one path is grounded through capacitor E9 and the other path is connected to pin 3 of transformer T4 through resistor R70 and diode D13; After passing through diode D11, pin 5 of transformer T4 is divided into three paths, one path is grounded through capacitor E8, the second path is grounded through resistor R66, and the third path is connected to chip U8, and chip U8 is connected to driver chip U13; pin 8 is grounded.

9. A freezer glass door, characterized in that: A controller comprising any one of claims 1 to 8.

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