Display circuit of refrigeration equipment and refrigeration equipment

Abstract

The utility model discloses a display circuit of refrigeration equipment and the refrigeration equipment, and belongs to the technical field of refrigeration equipment. The circuit comprises a display main body module which comprises a first display array and a switch branch; the display background module comprises a second display array and a driving circuit, the second display array and the first display array are arranged in a stacked mode, the driving circuit comprises a plurality of driving modules which are sequentially cascaded, the signal output ends of the driving modules are connected with the control end of the second display array, and the driving modules drive the second display array to be connected or disconnected; the first signal output end of the micro-control unit is connected with the control end of the switch branch, and the second signal output end of the micro-control unit is connected with the data input ends of the plurality of driving modules; the micro-control unit controls the switch branch to switch on or switch off the first display array. According to the circuit, the complexity of the circuit is reduced, and the control logic of the circuit can be simplified.

Description

Technical Field

[0001] This application belongs to the technical field of refrigeration equipment, and particularly relates to a display circuit and a refrigeration equipment of the refrigeration equipment. Background Art

[0002] The light-emitting diode (LED) lights of a freezer are usually installed outside the freezer to display the brand logo (Logotype, Logo), and can also be used as a lighting device for the freezer trademark.

[0003] Currently, the circuit of the LED lights of the freezer has defects such as complex circuit and corresponding complex control logic. Summary of the Utility Model

[0004] This application aims to solve at least one of the technical problems existing in the prior art. For this purpose, this application provides a display circuit and a refrigeration equipment of the refrigeration equipment, which reduces the complexity of the circuit and can simplify the control logic of the circuit.

[0005] In a first aspect, this application provides a display circuit of a refrigeration equipment, and the circuit includes:

[0006] A display main body module, including a first display array and a switch branch;

[0007] A display background module, including a second display array and a driving circuit, the second display array and the first display array are stacked, the driving circuit includes a plurality of driving modules cascaded in sequence, a signal output end of the driving module is connected to a control end of the second display array, and the driving module drives the second display array to be turned on or off;

[0008] A micro control unit, a first signal output end of the micro control unit is connected to a control end of the switch branch, and a second signal output end of the micro control unit is connected to data input ends of the plurality of driving modules;

[0009] The switch branch is controlled by the micro control unit to turn on or off the first display array.

[0010] According to the display circuit of the refrigeration equipment of this application, the micro control unit controls the display main body module and the display background module respectively, and simplifies the complexity of the circuit through the cascaded driving modules, can simplify the control logic of the circuit, and provides sufficient lighting for the refrigeration equipment while highlighting the display main body.

[0011] According to an embodiment of this application, the driving module includes a driving chip, and the driving chip has a cascaded output end.

[0012] According to an embodiment of the present application, the selected type of the driving chip is TM1804 or WS2811.

[0013] According to an embodiment of the present application, the second display array includes a plurality of display partitions, each display partition includes a plurality of LED lamp bead branches connected in parallel, and the driving chip adopts a single-line return-to-zero code data transmission protocol.

[0014] According to an embodiment of the present application, the second signal output terminal is a data pin.

[0015] According to an embodiment of the present application, each LED lamp bead branch includes a current-limiting resistor and a plurality of LED lamp beads connected in series with the current-limiting resistor.

[0016] According to an embodiment of the present application, the signal output terminals of the driving chip are respectively connected to the control ends of the control circuits in each of the display partitions, and the driving chip drives the control circuits to control the on or off of the LED lamp bead branches.

[0017] According to an embodiment of the present application, the display circuit further includes a voltage stabilizing branch, the input end of the voltage stabilizing branch is connected to the power supply, and the output end of the voltage stabilizing branch is connected to the working power supply end of the micro control unit.

[0018] In a second aspect, the present application provides a refrigeration device, which includes the display circuit of the refrigeration device as described in the first aspect.

[0019] According to an embodiment of the present application, the refrigeration device is a vending machine and includes:

[0020] A refrigeration system, which is used to provide cold air to the compartment of the vending machine so that the temperature of the compartment is suitable to be lower than zero degrees.

[0021] The additional aspects and advantages of the present application will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present application. Description of the Drawings

[0022] The above and / or additional aspects and advantages of the present application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0023] Figure 1 is a schematic structural diagram of the display circuit of the refrigeration device provided by the embodiment of the present application;

[0024] Figure 2 is a schematic diagram of the positional relationship between the first display array and the second display array provided by the embodiment of the present application;

[0025] Figure 3It is a schematic structural diagram of the first display array provided by an embodiment of the present application;

[0026] Figure 4 It is a schematic structural diagram of the switch branch provided by an embodiment of the present application;

[0027] Figure 5 It is a schematic structural diagram of the micro control unit provided by an embodiment of the present application;

[0028] Figure 6 It is a schematic structural diagram of the driving module provided by an embodiment of the present application;

[0029] Figure 7 It is a schematic structural diagram of the LED lamp bead branch provided by an embodiment of the present application;

[0030] Figure 8 It is a schematic structural diagram of the display partition provided by an embodiment of the present application;

[0031] Figure 9 It is a schematic structural diagram of the voltage stabilizing branch provided by an embodiment of the present application;

[0032] Reference numerals:

[0033] Display main body module 110; First display array 111; Switch branch 112; Display background module 120; Second display array 121; Driving circuit 122; Micro control unit 130. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, rather than all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0035] The terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such used data may be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order different from those illustrated or described herein, and the objects distinguished by "first", "second", etc. generally belong to the same category, and the number of objects is not limited. For example, the first object may be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0036] It should be noted that the refrigeration equipment in the embodiments of the present application can be understood as a general refrigeration storage device, including but not limited to refrigerators, freezers, display cabinets, beverage cabinets, wine cabinets, cold fresh cabinets, and refrigeration vending machines, etc. The refrigeration equipment has various structural forms and a wide range of applications.

[0037] The refrigeration equipment in this embodiment can be a vending cabinet, and the temperature of the compartment of the vending cabinet can be lower than 0 degrees Celsius. In some embodiments, the temperature of the compartment of the vending cabinet can be -5°C to -30°C, such as -25°C. The vending cabinet is used to sell frozen goods, such as ice cream and ice cubes, etc.

[0038] In the subsequent embodiments, the refrigeration equipment will be described by taking the cold cabinet as an example, which is not regarded as a limitation to the protection scope of the present application.

[0039] Next, with reference to the accompanying drawings, through specific embodiments and their application scenarios, the display circuit and the refrigeration equipment provided by the embodiments of the present application will be described in detail.

[0040] The display circuit and the refrigeration equipment provided by the embodiments of the present application can both be applied to the scenario of a frozen vending cabinet, and can be used for self-use or for sale.

[0041] As Figure 1 shown, the display circuit of the refrigeration equipment includes: a display main body module 110, a display background module 120, and a micro control unit 130.

[0042] The display main body module 110 includes a first display array 111 and a switch branch 112;

[0043] The display background module 120 includes a second display array 121 and a driving circuit 122. As Figure 2 shown, the second display array 121 and the first display array 111 are stacked, and the driving circuit 122 includes a plurality of driving modules cascaded in sequence. The signal output end of the driving module is connected to the control end of the second display array 121, and the driving module drives the second display array 121 to be turned on or off;

[0044] The micro control unit 130, the first signal output end of the micro control unit 130 is connected to the control end of the switch branch 112, and the second signal output end of the micro control unit 130 is connected to the data input ends of a plurality of driving modules;

[0045] The micro control unit 130 controls the switch branch 112 to turn on or off the first display array 111.

[0046] Among them, the display main body module 110 can display the brand logo or other information through the color or area of the lit lamps.

[0047] The first display array 111 may include a plurality of light-emitting elements, and the light-emitting elements may be LEDs or organic light-emitting diodes (OLEDs).

[0048] Among them, the first display array 111 may achieve different display effects during the process of turning on or off the first display array 111 according to the type of the switching element in the switching branch 112. For example, the switching element may be a field-effect transistor, a thyristor, or a PNP transistor.

[0049] As Figure 3 shown, the first display array 111 may be formed by paralleling a plurality of LED lamp bead branches. One end of the first display array 111 is connected to a 12V power supply. The LED lamp bead branch may be formed by connecting a plurality of LED lamp beads in series or in parallel. For example, the LED lamp bead branch is three series-connected LED lamp beads.

[0050] The second display array 121 may be divided into a plurality of display partitions, and each display partition may include a plurality of paralleled LED lamp bead branches.

[0051] Among them, the LED lamp beads in the LED lamp bead branch are connected in the forward direction.

[0052] As Figure 4 shown, the switching element Q1 is a field-effect transistor, and its model may be JXP2300VRG. The other end of the first display array 111 is connected to the drain (D) of the switching element Q1. During the process of turning on or off the first display array 111, a gradually brightening and gradually dimming display effect can be achieved.

[0053] In the switching branch 112, one end of the resistor R41 is connected to the gate (G) of the switching element Q1, and the other end of the resistor R41 serves as the control end of the switching branch 112. One end of the resistor R42 is connected to the gate (G) of the switching element Q1, and the other end of the resistor R42 is connected to the source (S) of the switching element Q1 and grounded.

[0054] Among them, the resistor R41 is 100Ω, and the resistor R42 is 10kΩ.

[0055] As Figure 5 shown, the microcontroller unit 130 (MCU) is U1, which may be a single-chip microcomputer of the HC89F0411A model. A control program for controlling the display main body module 110 and the display background module 120 is downloaded through the 2nd pin (SDA) or the 4th pin (SCK). The 6th pin and the 7th pin are empty pins. The 1st pin is the working power supply terminal, connected to the +5V working power supply, and the 8th pin is grounded (GND).

[0056] Pin 3 (LOGO-PWM) is the first signal output terminal, which can output a PWM signal. The high and low levels in the PWM signal are respectively used to control the on and off of the switching element in the switching branch 112. By changing the duty cycle of the PWM signal, the gradual brightening and dimming effects of the LED beads in the first display array 111 are achieved.

[0057] Pin 5 (DAT) is the second signal output terminal, which can output a single-line return-to-zero code data signal.

[0058] In addition, the microcontroller unit 130 can also select a single-chip microcomputer of the STC8G1K08A model.

[0059] It can be understood that the microcontroller unit 130 is built-in with a Central Processing Unit (CPU), a memory unit, an input / output control unit, a timer, a Program Counter (PC), an internal bus, General-purpose input / output (GPIO), a power management unit, a clock source, and a debugging interface.

[0060] The memory unit includes Flash Memory and Random Access Memory (RAM). The debugging interface can be Pin 2 (SDA) and Pin 4 (SCK), which are used for burning control programs and preliminary debugging operations, as well as providing real-time debugging information and operating status. GPIO can be Pin 3 (LOGO-PWM) and Pin 5 (DAT).

[0061] During the process of downloading the control program, the control program is compiled into a binary file and written into the Flash Memory of the microcontroller unit 130 via Pin 2 (SDA) or Pin 4 (SCK) by a programmer or a burning tool integrated on the development board, realizing the burning of the control program.

[0062] After the control program is burned into the Flash Memory, the microcontroller unit 130 can start executing the control program according to the specified startup vector. The program code, constants, and initialization data of the control program are stored in the Flash Memory. For example, the startup vector can be a reset vector.

[0063] When the control program is executed, the RAM is used to store variables, stacks, and other temporary data required during operation. The CPU reads instructions from the Flash Memory according to the instruction address pointed to by the counter, decodes, and executes them. The CPU accesses the RAM, Flash Memory, and other peripherals through the internal bus.

[0064] The control program can control and read the GPIO status through the configuration of specific registers in the input / output control unit, configure timers and counters to generate precise time delays or periodic trigger events. The timers and counters can be used for real-time control and synchronization tasks, communicate with external devices through GPIO, and control the on and off of LEDs.

[0065] The control program can exchange data and communicate with external devices through GPIO, and manage the communication process through corresponding registers and state machines. For example, the control of the display background module 120 and the display background module 120, etc.

[0066] The power management unit ensures that the microcontroller unit 130 can be stably powered in various working states, thus ensuring the normal operation of the program and the integrity of data.

[0067] In actual execution, when the microcontroller unit 130 executes the control program, control signals can be output through both the first signal output terminal and the second signal output terminal. The control signals are characterized by high and low levels. Through the high and low levels of the control signals at the first signal output terminal, the on and off of the switching element Q1 in the switching branch 112 are controlled, realizing the connection or disconnection of the first display array 111, and the LED lamp beads in the first display array 111 correspondingly show the display effects of gradually lighting up and gradually dimming.

[0068] The control signals are output to multiple cascaded driving modules in the driving circuit 122 through the second signal output terminal. The decoder in the driving module can decode the control signals, and the logic circuit in the driving module makes logical judgments on the decoded data to generate driving signals, and controls each display partition in the second display array 121 respectively.

[0069] According to the display circuit of the refrigeration device provided by the embodiments of the present application, the microcontroller unit 130 controls the display main body module 110 and the display background module 120 respectively, simplifies the complexity of the circuit through cascaded driving modules, can simplify the control logic of the circuit, and while highlighting the display main body, provides sufficient lighting for the refrigeration device.

[0070] In some embodiments, the driving module includes a driving chip, and the driving chip has a cascaded output terminal.

[0071] Among them, when the driving chip has a cascaded output terminal, the cascaded output terminal of one driving chip can be connected to the signal input terminal of another driving chip to expand or cascade functions.

[0072] Such as Figure 6As shown, the driving chip U2 is TM1804. The 1st - 3rd pins of the driving chip are the signal output terminals of the driving module, realizing the 3 - way expansion of the driving signal, and are used to output the driving signal for controlling the second display array 121. The 4th pin is grounded (GND). The 5th pin is the cascade output terminal. The 6th pin is connected to one end of the resistor R62, and the other end of the resistor R62 is the data input terminal of the driving module. The 7th pin is the reset terminal. The 8th pin is connected to the +12V working power supply through the resistor R61 and is grounded through the capacitor C1.

[0073] Among them, each driving chip receives 3 groups of 8 - bit PWM data (a total of 24 bits). The driving signal can be a PWM wave, which controls the lighting and extinguishing of the LEDs in the second display array 121, showing the effects of running horses and fading out.

[0074] In actual implementation, the signal input terminal of one driving chip is connected to the cascade output terminal of the next driving chip. The signal input terminal of the first driving chip serves as the data input terminal of multiple driving modules. Each signal output terminal is respectively connected to the control terminal of a corresponding display partition of the second display array 121, and can form a running - horse effect in the second display array 121.

[0075] The resistor R61 is selected as 2.4kΩ, the resistor R62 is selected as 100Ω, and the capacitor C1 is 0.1μF / 50V.

[0076] In this embodiment, through the driving chip with a cascade output terminal, the stability of the driving circuit 122 can be enhanced, and the architecture of the driving circuit 122 can be simplified.

[0077] In some embodiments, the selected type of the driving chip is TM1804 or WS2811.

[0078] Among them, the driving chips of the TM1804 or WS2811 models are both LED driving chips with cascade output terminals, and can control each driving chip through the same control logic, simplifying the wiring of the driving circuit 122.

[0079] In some embodiments, the second display array 121 includes multiple display partitions. The display partition includes multiple parallel LED lamp bead branches, and the driving chip adopts a single - wire return - to - zero data transmission protocol.

[0080] For example, the driving circuit 122 includes three driving modules, each driving module is provided with one driving chip, and the signals between the three driving chips adopt a cascading method. The 5th pin (DAT) of the micro control unit 130 outputs the first 24-bit (single-line return-to-zero code data) to the driving chip 1 (the first driving chip). The driving chip 1 has not yet forwarded the data to the driving chip 2 (the second driving chip). Then, the micro control unit 130 continues to send data. The driving chip 1 receives the second 24-bit (single-line return-to-zero code data) again. Since the driving chip 1 already stores the first 24-bit, the driving chip 1 forwards the second 24-bit. The driving chip 2 receives the data forwarded by the driving chip 1. At this time, the driving chip 2 has not yet forwarded the data to the driving chip 3 (the third driving chip); the micro control unit 130 continues to send data. The driving chip 1 forwards the received third 24-bit (single-line return-to-zero code data) to the driving chip 2 again. Since the driving chip 2 also already stores a 24-bit, the driving chip 2 forwards the third 24-bit to the driving chip 3 again. The driving chip 3 receives the third 24-bit.

[0081] Among them, the single-line return-to-zero code data is binary data represented by changing the signal level.

[0082] At this time, if the micro control unit 130 sends a RESET low-level signal to the driving chip 1, all the driving chips will be reset and output the control signals after decoding the 24-bit data received by each of them, completing a data refresh cycle, and the three driving chips return to the receiving ready state again.

[0083] In the related art, due to the large number of controlled LED lamp beads, the corresponding control method is relatively cumbersome.

[0084] In this embodiment, the micro control unit 130 only needs one data line to send all the single-line return-to-zero code data to all the driving chips at one time, which is convenient for PCB wiring and can simplify the control method and the data transmission method between the micro control unit 130 and the driving chips.

[0085] In some embodiments, the second signal output end is a data pin.

[0086] The 5th pin (DAT) of the micro control unit 130 is a data pin, which is used to input or output data signals. Through the configuration of the single-line return-to-zero code data transmission protocol, single-line return-to-zero code data can be sent to the driving circuit 122.

[0087] In some embodiments, the LED lamp bead branch includes a current-limiting resistor and a plurality of LED lamp beads connected in series with the current-limiting resistor.

[0088] Such as Figure 7As shown, in the LED lamp bead branch, LED lamp beads M1, M2, and M3 are connected in series in sequence. M2 and M3 are connected through a current-limiting resistor R71. When the power is sufficient, the number of series-connected LED lamp beads in the LED lamp bead branch can be correspondingly increased.

[0089] Among them, the current-limiting resistor R71 is selected as 100Ω.

[0090] In some embodiments, the signal output terminals of the driving chip are respectively connected to the control terminals of the control circuits in each display partition, and the driving chip drives the control circuits to control the on or off of the LED lamp bead branch.

[0091] It can be understood that a switching element is provided in the control circuit. The signal output terminal of the driving chip outputs a high level to drive the switching element to conduct, controlling the LED lamp bead branch to be turned on, and the LED lamp beads in the LED lamp bead branch emit light. The signal output terminal of the driving chip outputs a low level, the switching element is cut off, controlling the LED lamp bead branch to be turned off, and the LED lamp beads in the LED lamp bead branch do not emit light.

[0092] As Figure 8 shown, in the control circuit of the display partition, the switching element is a triode Q2. One end of a resistor R81 is connected to the base (b) of the triode Q2, and the other end of the resistor R81 is the control terminal of the control circuit of the display partition in the second display array 121. The base (b) of the triode Q2 is also connected to the emitter (e) of the triode Q2 through a resistor R82, and the emitter (e) of the triode Q2 is connected to the +12V working power supply.

[0093] Among them, the control terminal of the control circuit is the control terminal of the display partition.

[0094] The display partition of the second display array 121 further includes one or more parallel-connected LED lamp bead branches. One end of the LED lamp bead branch is grounded, and the other end is connected to the collector (c) of the triode Q2.

[0095] Among them, the LED lamp beads in the LED lamp bead branch are connected in the forward direction. The driving signal is characterized by high and low levels. The high level in the driving signal can drive the conduction between the e pole and c pole of the triode Q2, providing a +12V voltage to the LED lamp bead branches of each display partition of the second display array 121, driving the anodes of the LED lamp beads.

[0096] Through the control program in the micro control unit 130, the running horse and fading out display effects can be achieved in each display partition of the second display array 121.

[0097] The triode Q2 is selected as SS8550, the resistor R81 is selected as 2kΩ, and the resistor R82 is selected as 10Ω.

[0098] In addition, the switching element transistor Q2 can be replaced with a PNP transistor or a P-channel Metal Oxide Semiconductor (PMOS).

[0099] Through the multiple controls of the single-chip microcomputer and the driving circuit 122 in this application, by simply inputting different control programs, it is possible to control the lighting and extinguishing of the LED lamp beads in the first display array 111 and the second display array 121, and display various display style effects such as a running horse in the second display array 121, making up for the shortcomings of the traditional Logo lamp with fixed and single display styles and complex control logics, and improving the customer experience.

[0100] In some embodiments, the display circuit further includes a voltage stabilization branch. The input end of the voltage stabilization branch is connected to the power supply, and the output end of the voltage stabilization branch is connected to the working power supply end of the micro control unit 130.

[0101] Among them, the input end of the voltage stabilization branch can be connected to the switching power supply that converts the AC +220V of the refrigeration equipment to DC +12V.

[0102] As Figure 9 shown, a voltage regulator integrated circuit (U3) is provided in the voltage stabilization branch. The input end of the voltage stabilization branch is connected to the +12V DC working power supply. The 3rd pin of the voltage regulator integrated circuit U3 is connected to one end of the diode D1. The other end of the diode D1 serves as the input end of the voltage stabilization branch. The 3rd pin is also grounded through the capacitor C2 and the capacitor C3 respectively. The 2nd pin of the voltage regulator integrated circuit U3 is grounded. The 1st pin of the voltage regulator integrated circuit U3 is grounded through the capacitor C4 and the capacitor C5 respectively. The 1st pin of the voltage regulator integrated circuit U3 also serves as the output end of the voltage stabilization branch. The voltage regulator integrated circuit U3 steps down the DC +12V power supply to +5V DC power to provide the +5V working power supply for the micro control unit 130.

[0103] Among them, the diode D1 can prevent reverse connection, and its model selection can be 1N4007. The model selection of the voltage regulator integrated circuit U3 is 78L05. The model selection of the capacitor C2 is 10μF / 25V. The model selection of the capacitor C3 is 0.1μF / 50V. The model selection of the capacitor C4 is 22μF / 10V. The model selection of the capacitor C2 is 0.1μF / 50V.

[0104] In this embodiment, the voltage stabilization branch ensures that the display circuit can work under stable voltage conditions without being affected by input voltage fluctuations or load changes.

[0105] An embodiment of this application provides a refrigeration equipment, including the display circuit of the refrigeration equipment in the above embodiment.

[0106] According to the refrigeration equipment provided by the embodiments of the present application, the micro control unit 130 controls the display main body module 110 and the display background module 120 respectively. By means of the cascaded driving module, the complexity of the circuit is simplified, the control logic of the circuit can be simplified, and while highlighting the display main body, sufficient illumination is provided for the refrigeration equipment.

[0107] In some embodiments, the refrigeration equipment is a vending machine and includes:

[0108] A refrigeration system, which is used to provide cooling capacity for the compartment of the vending machine so that the temperature of the compartment is suitable to be lower than zero degree.

[0109] It should be noted that in this article, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0110] In the description of the present application, the "first feature" and "second feature" may include one or more of such features.

[0111] In the description of the present application, the meaning of "a plurality of" is two or more.

[0112] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

[0113] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0114] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A display circuit for a refrigeration device, characterized in that: include: A display main body module, comprising a first display array and a switch branch; A display background module includes a second display array and a driving circuit, wherein the second display array and the first display array are stacked, the driving circuit includes a plurality of driving modules cascaded in sequence, the signal output end of the driving module is connected to the control end of the second display array, and the driving module drives the second display array to be turned on or off; A micro control unit, wherein a first signal output terminal of the micro control unit is connected to a control terminal of the switch branch, and a second signal output terminal of the micro control unit is connected to data input terminals of the plurality of driving modules; The switch branch is controlled by the micro control unit to switch on or off the first display array.

2. The display circuit of the refrigeration equipment according to claim 1, characterized in that: The driving module comprises a driving chip, and the driving chip has a cascade output terminal.

3. The display circuit of the refrigeration equipment according to claim 2, characterized in that: The driver chip is TM1804 or WS2811.

4. The display circuit of the refrigeration equipment according to claim 2, characterized in that: The second display array includes a plurality of display partitions, each display partition includes a plurality of parallel LED lamp bead branches, and the driving chip adopts a single-line return-to-zero code data transmission protocol.

5. The display circuit of the refrigeration equipment according to claim 4, characterized in that: The second signal output terminal is a data pin.

6. The display circuit of the refrigeration equipment according to claim 4, characterized in that: The LED lamp bead branch includes a current limiting resistor and a plurality of LED lamp beads connected in series with the current limiting resistor.

7. The display circuit of the refrigeration equipment according to claim 4, characterized in that: The signal output end of the driving chip is respectively connected to the control end of the control circuit in each of the display partitions, and the driving chip drives the control circuit to control the LED lamp bead branch to be turned on or off.

8. The display circuit of a refrigeration device according to any one of claims 1 to 7, characterized in that: The display circuit also includes a voltage stabilizing branch, the input end of the voltage stabilizing branch is connected to a power supply, and the output end of the voltage stabilizing branch is connected to a working power supply end of the micro control unit.

9. A refrigeration device, characterized in that: The invention comprises a display circuit of the refrigeration equipment as claimed in any one of claims 1 to 8.

10. The refrigeration device according to claim 9, characterized in that: The refrigeration device is a vending machine and comprises: A refrigeration system is used to provide coldness to a compartment of the vending machine so that the temperature of the compartment is suitable to be below zero degrees.

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