Protection unit, display and its protection method, door of refrigeration equipment, refrigeration equipment

Abstract

This application provides a protection unit, a display, a protection method thereof, a door of a refrigeration device, and a refrigeration device. The protection unit is applied to a display on the door of the refrigeration device. The protection unit includes a short-circuit trigger module and a short-circuit protection module. The short-circuit trigger module includes a power line and a ground line, and is configured to be electrically connected to a control device. At least a portion of the power line and at least a portion of the ground line are parallel and both expose metal, and are both configured to be located near an opening and / or gap in the housing, closer to the control device than the housing. The display includes the housing and the control device, the control device being disposed within the housing, and the housing having at least one opening. The short-circuit protection module is electrically connected to the short-circuit trigger module and configured to be electrically connected to the control device. When the power line and the ground line are short-circuited, the electrical connection between the power line and the control device is disconnected, preventing display malfunction.

Description

Technical Field

[0001] This application relates to the field of display technology, and more specifically, to a protection unit, a display and its protection method, a door of a refrigeration device, and a refrigeration device. Background Technology

[0002] Refrigeration equipment can include refrigerators, freezers, etc. The door of the refrigeration equipment is located between the refrigeration equipment and the external environment. In an indoor environment, the temperature difference between the inside and outside of the refrigeration equipment door is large. When the saturated vapor pressure of the outside air is high, the water vapor in the air will condense into water droplets on the inside of the refrigeration equipment door at the moment of opening the door, and flow down the inner wall of the refrigeration equipment door.

[0003] In the prior art, the back panel of a monitor installed on the door of a refrigeration unit faces the inside of the door. When the door of the refrigeration unit is opened, the back panel of the monitor is exposed to the cold air inside the refrigeration unit, resulting in a low temperature. The external hot air easily condenses into water droplets on the back panel of the monitor. These water droplets can enter the monitor housing through openings in the housing, causing short circuits in the internal circuitry and leading to monitor malfunction. Summary of the Invention

[0004] This application addresses the shortcomings of existing methods by proposing a protection unit to solve the technical problem that water droplets condensed on the back panel of the display can enter the interior of the housing through openings, causing short circuits in the power supply and ground of the internal circuitry, thus leading to display malfunction.

[0005] In a first aspect, embodiments of this application provide a protection unit for a display on the door of a refrigeration device, the protection unit comprising:

[0006] A short-circuit trigger module includes a power line and a ground line, and is configured to be electrically connected to a control device. At least a portion of the power line and at least a portion of the ground line are parallel and both are exposed metal, and both are configured to be located at an opening and / or gap closer to the housing than the control device. The display includes a housing and a control device, the control device being disposed in the housing, and the housing having at least one opening.

[0007] The short-circuit protection module is electrically connected to the short-circuit trigger module and is configured to be electrically connected to the control device. When the power line and ground line are short-circuited, the power line is disconnected from the control device.

[0008] In one possible implementation, the power line, ground line, and control device are mounted on the same circuit board, with the power line and ground line wrapped around the periphery of the control device.

[0009] In one possible implementation, the power and ground lines are located at the edge of the circuit board.

[0010] In one possible implementation, the short-circuit protection module is mounted on the control device's circuit board, or on a separate circuit board.

[0011] In one possible implementation, the short-circuit protection module includes: a first branch and a second branch, both of which are electrically connected between the power supply line and the control device;

[0012] The first branch is configured to conduct when the power line and the ground line are not short-circuited, thereby cutting off the second branch and maintaining the electrical connection between the power line and the control device.

[0013] The second branch is configured to conduct when the power line and ground line are short-circuited, causing the first branch to be cut off and disconnecting the electrical connection between the power line and the control device.

[0014] In one possible implementation, the first branch includes a first switch module and a third switch module; the control terminal of the third switch module is electrically connected to the first node, the first terminal of the third switch module is electrically connected to the control terminal of the first switch module, the second terminal of the first switch module is electrically connected to the first node, and the first terminal of the first switch module is electrically connected to the control device.

[0015] The second branch includes a voltage regulator module, a second switch module, and a fourth switch module; the first end of the voltage regulator module is electrically connected to the first end of the first switch module, the second end of the voltage regulator module is electrically connected to the control end of the second switch module, the second end of the second switch module is electrically connected to the first node, the first end of the second switch module is electrically connected to the control end of the fourth switch module, and the first end of the fourth switch module is electrically connected to the first node.

[0016] The first node is electrically connected to the power line;

[0017] The second terminal of the third switch module and the second terminal of the fourth switch module are both electrically connected to the ground terminal.

[0018] In one possible implementation, the second branch also includes: a first light-emitting element;

[0019] The two ends of the first light-emitting element are electrically connected to the second end of the voltage regulator module and the control end of the second switch module, respectively.

[0020] In one possible implementation, the first light-emitting element is a light-emitting diode;

[0021] The cathode and anode of the light-emitting diode are electrically connected to the second terminal of the voltage regulator module and the control terminal of the second switching module, respectively.

[0022] In one possible implementation, the protection unit also includes:

[0023] The warning module, along with the short-circuit trigger module, is configured to be electrically connected to the control device to provide a warning indication when the power line and ground line are short-circuited.

[0024] In one possible implementation, the alert module includes: a third branch, a fourth branch, and a storage module;

[0025] The third and fourth branches are connected in parallel; both the third and fourth branches are electrically connected between the second node and the storage module; the second node is electrically connected to the power supply line and the control device.

[0026] The third branch includes a diode, and the fourth branch includes a second light-emitting element;

[0027] The third branch is configured such that when the power line and the ground line are not short-circuited, the diode conducts, the third branch conducts, the storage module is charged, and the fourth branch is cut off.

[0028] The fourth branch is configured such that when the power line and ground line are short-circuited, the storage module discharges, the second light-emitting element turns on, the fourth branch is turned on, and the third branch is turned off.

[0029] Secondly, embodiments of this application provide a display for use on the door of a refrigeration device, comprising: a housing, a control device, a display panel, and a protection unit provided in the first aspect of embodiments of this application;

[0030] The control device is housed inside the housing, which has at least one opening; the short-circuit trigger module of the protection unit is located inside the housing, at least a portion of the power line and at least a portion of the ground line of the short-circuit trigger module are parallel and exposed metal, and are configured to be located closer to the opening and / or the gap of the housing than the control device; the control device is electrically connected to the display panel.

[0031] Thirdly, embodiments of this application provide a door for a refrigeration device, including an angle measurement module, an electric fan, and a display provided in the second aspect of embodiments of this application;

[0032] Angle measurement modules are installed on the door of the refrigeration equipment;

[0033] The electric fan is housed inside the box.

[0034] The electric fan and angle measurement module are both electrically connected to the control unit of the control device;

[0035] An angle measurement module is used to sense the orientation of the door of the refrigeration equipment, generate and output the angle signal of the door of the refrigeration equipment;

[0036] The control unit receives angle signals and determines whether the door of the refrigeration equipment is open based on the angle signals. When it is determined that the door of the refrigeration equipment is open, it controls the electric fan to rotate.

[0037] In one possible implementation, the control unit is also configured to control the rotation time and speed of the electric fan.

[0038] Fourthly, embodiments of this application provide a refrigeration device, including the door of the refrigeration device provided in the third aspect of embodiments of this application.

[0039] Fifthly, embodiments of this application provide a method for protecting a display, applied to the door of a refrigeration device provided in the third aspect of embodiments of this application. The method for protecting the display includes:

[0040] Receive the door angle signal of the refrigeration equipment;

[0041] Determine whether the door of the refrigeration equipment is open based on the angle signal;

[0042] When the door of the refrigeration unit is determined to be open, the electric fan is controlled to rotate.

[0043] The beneficial technical effects of the technical solutions provided in this application include:

[0044] The protection unit provided in this application is applied to a display on the door of a refrigeration equipment. When water droplets condensed on the back panel of the display on the door of the refrigeration equipment enter the interior of the display housing through an opening in the housing, the protection unit can trigger the short-circuit protection module to disconnect the electrical connection between the power line and the control device, i.e., disconnect the electrical connection between the power line and the circuit inside the housing, thereby preventing the display from malfunctioning.

[0045] Additional aspects and advantages of this application will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of this application. Attached Figure Description

[0046] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0047] Figure 1 This is a schematic diagram of the structure of the protection unit provided in the embodiments of this application;

[0048] Figure 2 A schematic diagram of the front of the door of the refrigeration equipment provided in the embodiments of this application;

[0049] Figure 3 A schematic diagram of the back of the door of the refrigeration equipment provided in the embodiments of this application;

[0050] Figure 4 A circuit diagram of the short-circuit protection module provided in the embodiments of this application;

[0051] Figure 5 The circuit schematic diagram of the warning module provided in the embodiments of this application;

[0052] Figure 6 This is a flowchart illustrating a display protection method provided in an embodiment of this application.

[0053] Figure label:

[0054] 1-Protection unit; 11-Short circuit trigger module; 111-Ground wire; 112-Power supply line; 12-Short circuit protection module; 121-First switch module; 122-Second switch module; 123-Third switch module; 124-Fourth switch module; 125-Voltage regulator module; 126-First light-emitting element; 13-Alarm module; 131-Third branch; 132-Fourth branch; 133-Storage module;

[0055] 2-Control device;

[0056] 3-Circuit board;

[0057] 4-Power supply device;

[0058] 50 - Monitor, 51 - Back panel, 52 - Housing;

[0059] 60-Angle Measurement Module;

[0060] 70-Electric Fan;

[0061] 100 - Doors of refrigeration equipment. Detailed Implementation

[0062] This application is described in detail below. Examples of embodiments of this application are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. Furthermore, detailed descriptions of known technologies that are unnecessary for the features of this application are omitted. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0063] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0064] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this application means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we say an element is “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, “connected” or “coupled” as used herein can include wireless connections or wireless coupling. The term “and / or” as used herein includes all or any units and all combinations of one or more associated listed items.

[0065] The inventors of this application have discovered through research that the current "smart IoT" retail solution is a cloud-integrated solution, consisting of products such as an IoT public service platform and an IoT cloud host terminal. Through the intelligent integration of software and hardware and data interaction, it achieves precise and efficient retail services.

[0066] Refrigeration equipment can include refrigerators, freezers, etc., and includes the door of the refrigeration equipment. When the refrigeration equipment is a refrigerator, the door of the refrigeration equipment is the refrigerator door. The following description uses a refrigerator door as an example.

[0067] The refrigerator door is located between the refrigerator and the external environment. In an indoor environment, there is a significant temperature difference between the inside and outside of the refrigerator door. When the saturated vapor pressure of the outside air is high, water vapor in the air will condense into water droplets on the inside of the refrigerator door the moment the door is opened, and then flow down the inner wall of the refrigerator door. The PC (Personal Computer) circuit board (i.e., the control device) generates significant heat during operation, with local temperatures reaching up to 90°C.

[0068] To achieve better heat dissipation, existing technologies use a separate design for the display module and system control box on the refrigerator door. Several ventilation holes (openings) are pre-drilled around the system control box (the front, back, left, and right sides, excluding the top cover). When condensed water droplets gradually flow down to the system control box, they can enter the box through these holes and reach the surface of the PC board (control device), causing a short circuit between the power supply and ground, and ultimately damaging the PC board (control device).

[0069] Furthermore, the inventors of this application also discovered that gaps are inevitable at the junction of the top cover of the system control box (i.e., the cover on top of the system control box) and the four sides of the system control box (i.e., the front, back, left, and right sides of the system control box, excluding the top cover). Since the PC board (i.e., the control device) has numerous interfaces, and the interfaces of the PC board have cables (including power cables, signal cables, etc.) that connect to external devices through openings, condensed water droplets can easily flow into the circuit board inside the system control box along the cables from these openings or gaps.

[0070] This application provides a protection unit, a display and its protection method, a door for a refrigeration device, and a refrigeration device, which aim to solve the above-mentioned technical problems of the prior art.

[0071] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments.

[0072] This application provides a protection unit 1, such as... Figure 1-3 As shown, the protection unit 1 is applied to the display 50 on the door 100 of the refrigeration equipment. The protection unit 1 includes a short circuit trigger module 11 and a short circuit protection module 12.

[0073] Specifically, the short-circuit trigger module 11 includes a power line 112 and a ground line 111, and is configured to be electrically connected to the control device 2. At least a portion of the power line 112 and at least a portion of the ground line 111 are parallel and both expose metal, and are both configured to be located closer to the control device 2 than the opening and / or gap of the housing 52. The display 50 includes a housing 52 and the control device 2, the control device 2 being disposed inside the housing 52, and the housing 52 having at least one opening. The short-circuit protection module 12 is electrically connected to the short-circuit trigger module 11 and is configured to be electrically connected to the control device 2. When the power line 112 and the ground line 111 are short-circuited, the power line 112 is disconnected from the control device 2.

[0074] It should be noted that refrigeration equipment can include refrigerators, freezers, etc., and refrigerators can be household refrigerators or commercial refrigerators. Commercial refrigerators include refrigerator vending machines, etc.

[0075] Optionally, the protection unit 1 provided in this application embodiment is applied to the display 50 on the door of the refrigerator vending machine.

[0076] Optionally, the control device 2 can be a PC board.

[0077] Optionally, at least a portion of the power line 112 and at least a portion of the ground line 111 are parallel and both have exposed copper.

[0078] It should be noted that mature short-circuit protection circuit technology already exists, and many power chips have built-in short-circuit protection circuits. The control device 2 may or may not have a short-circuit protection module 12.

[0079] Optionally, when a short-circuit protection module 12 is already installed in the control device 2, the short-circuit protection module 12 can be the short-circuit protection module 12 already installed in the control device 2.

[0080] Optionally, when the control device 2 does not have a short-circuit protection module 12, the short-circuit protection module 12 can be a separately designed short-circuit protection module 12. This application does not impose any particular limitation.

[0081] The protection unit 1 provided in this application embodiment is applied to the display 50 on the door 100 of the refrigeration equipment. When water droplets condensed on the back panel 51 of the display 50 on the door 100 of the refrigeration equipment enter the interior of the housing 52 of the display 50 through the opening of the housing 52, the protection unit 1 can short-circuit the power line 112 and the ground line 111 by means of at least a portion of the power line 112 and at least a portion of the ground line 111 of the short-circuit trigger module 11, which are parallel and exposed metal and are configured to be located closer to the opening and / or gap of the housing 52 than the control device 2. The water droplets first short-circuit the power line 112 and the ground line 111, thereby triggering the short-circuit protection module 12 to disconnect the power line 112 and the control device 2, that is, to disconnect the power line 112 and the electrical connection of the circuit inside the housing 52, thereby preventing the display 50 from malfunctioning.

[0082] In some embodiments, the power line 112, the ground line 111, and the control device 2 are disposed on the same circuit board 3, and the power line 112 and the ground line 111 are wound around the periphery of the control device 2 to surround the internal circuitry of the control device 2. Condensed water droplets flowing in from the outside short-circuit the power supply and ground before flowing into the control device 2.

[0083] In some embodiments, such as Figure 1 As shown, power line 112 and ground line 111 are located at the edge of circuit board 3. This ensures that condensed water droplets flowing in from the outside short-circuit the power supply and ground before flowing into control device 2.

[0084] In some embodiments, the short-circuit protection module 12 is disposed on the circuit board 3 of the control device 2, or disposed separately on another circuit board 3.

[0085] Optionally, such as Figure 1As shown, the power cord 112, ground wire 111, control device 2, and short-circuit protection module 12 are all mounted on the same circuit board 3. Compared to the position of the control device 2, the positions of the power cord 112 and ground wire 111 are closer to the openings and / or gaps of the housing 52; that is, the power cord 112 and ground wire 111 are set in the area corresponding to the openings and / or gaps of the housing 52. Specifically, on the edge of the circuit board 3 (the circuit board 3 of the control device 2) inside the housing 52, corresponding to the area of ​​the opening, the power cord 112 (the positive terminal of the power output from the power supply device 4) and the ground wire 111 on the circuit board 3 are designed to be parallel, with exposed copper, and extended to surround the internal circuitry on the circuit board 3.

[0086] If water droplets enter the internal circuit board 3, the power supply and ground at the edge of the circuit board 3 will be short-circuited before entering the internal circuit of the circuit board 3, triggering protection, that is, triggering the short-circuit protection module 12 to work, so as to protect the internal circuit of the box 52.

[0087] It should be noted that the conventional design of PCB (Printed Circuit Board), i.e., circuit board 3, is to design a ground line 111 around the outermost edge of circuit board 3 to protect the internal circuit and improve EMC (electromagnetic compatibility) and ESD (electrostatic discharge) performance. Figure 1 The power line 112 and ground line 111 are designed side by side on the edge of the PCB (circuit board 3). This can be achieved simply by adding the power line 112 to the existing conventional PCB layout.

[0088] When the control device 2 does not have a short-circuit protection module 12, the short-circuit protection module 12 can be a separately designed short-circuit protection module 12.

[0089] In some embodiments, the short-circuit protection module 12 includes: a first branch and a second branch, both of which are electrically connected between the power line 112 and the control device 2;

[0090] The first branch is configured to conduct when the power line 112 and the ground line 111 are not short-circuited, thereby cutting off the second branch and maintaining the electrical connection between the power line 112 and the control device 2.

[0091] The second branch is configured to conduct when the power line 112 and the ground line 111 are short-circuited, thereby cutting off the first branch and disconnecting the electrical connection between the power line 112 and the control device 2.

[0092] In some embodiments, such as Figure 4As shown, the first branch includes a first switch module 121 and a third switch module 123; the control terminal of the third switch module 123 is electrically connected to the first node N1, the first end of the third switch module 123 is electrically connected to the control terminal of the first switch module 121, the second end of the first switch module 121 is electrically connected to the first node N1, and the first end of the first switch module 121 is electrically connected to the control device 2.

[0093] The second branch includes a voltage regulator module 125, a second switch module 122, and a fourth switch module 124; the first end of the voltage regulator module 125 is electrically connected to the first end of the first switch module 121, the second end of the voltage regulator module 125 is electrically connected to the control end of the second switch module 122, the second end of the second switch module 122 is electrically connected to the first node N1, the first end of the second switch module 122 is electrically connected to the control end of the fourth switch module 124, and the first end of the fourth switch module 124 is electrically connected to the first node N1; wherein, the first node N1 is electrically connected to the power line 112;

[0094] The second terminal of the third switch module 123 and the second terminal of the fourth switch module 124 are both electrically connected to the ground terminal.

[0095] Figure 4 and Figure 5 In this configuration, VCC is connected to the power supply line 112, and the outputs of the short-circuit protection module 12 and the warning module 13 are both electrically connected to the control device 2. VCC is the power supply voltage provided to the control device 2 by the power supply unit 4, such as 5V, 12V, 24V, etc. Of course, VCC can also be other voltage values ​​required for adaptation.

[0096] Optionally, such as Figure 4 As shown, the first switch module 121 includes a first transistor T1, and the control electrode, first electrode, and second electrode of the first transistor T1 serve as the control terminal, first terminal, and second terminal of the first switch module 121, respectively; the second switch module 122 includes a second transistor T2, and the control electrode, first electrode, and second electrode of the second transistor T2 serve as the control terminal, first terminal, and second terminal of the second switch module 122, respectively; the third switch module 123 includes a third transistor T3, and the control electrode, first electrode, and second electrode of the third transistor T3 serve as the control terminal, first terminal, and second terminal of the third switch module 123, respectively; the fourth switch module 124 includes a fourth transistor T4, and the control electrode, first electrode, and second electrode of the fourth transistor T4 serve as the control terminal, first terminal, and second terminal of the fourth switch module 124, respectively; the voltage regulator module 125 includes a Zener diode DZ, and the anode and cathode of the Zener diode DZ serve as the first terminal and second terminal of the voltage regulator module 125, respectively.

[0097] When the power line 112 and the ground line 111 are not short-circuited, the third switch module 123 is turned on, which turns on the first switch module 121. Therefore, the first branch is turned on, which turns off the voltage regulator module 125, the second switch module 122, and the fourth switch module 124, and the second branch is turned off.

[0098] When the power line 112 and the ground line 111 are short-circuited, the voltage regulator module 125 is turned on, which turns on the second switch module 122 and the fourth switch module 124, and turns on the second branch, which turns off the first switch module 121 and the third switch module 123, and turns off the first branch.

[0099] In some embodiments, such as Figure 4 As shown, the second branch also includes: a first light-emitting element 126; the two ends of the first light-emitting element 126 are electrically connected to the second end of the voltage regulator module 125 and the control end of the second switch module 122, respectively.

[0100] In some embodiments, such as Figure 4 As shown, the first light-emitting element 126 is a light-emitting diode (LED); the cathode and anode of the LED are electrically connected to the second terminal of the voltage regulator module 125 and the control terminal of the second switch module 122, respectively.

[0101] In some embodiments, continue as follows Figure 4 As shown, the short-circuit protection module 12 also includes: a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, and a sixth resistor R6. The first transistor T1 and the second transistor T2 are both PNP transistors, and the third transistor T3 and the fourth transistor T4 are both NPN transistors.

[0102] Specifically, the first resistor R1 is electrically connected between the collector of the second transistor T2 and the base of the fourth transistor T4; the second resistor R2 is electrically connected between the first node N1 and the base of the second transistor T2; the third resistor R3 is electrically connected between the emitter of the third transistor T3 and the ground terminal; the fourth resistor R4 is electrically connected between the base of the third transistor T3 and the collector of the fourth transistor T4; the fifth resistor R5 is electrically connected between the collector of the fourth transistor T4 and the first node N1; and the sixth resistor R6 is electrically connected between the anode of the Zener diode DZ and the collector of the first transistor T1.

[0103] like Figure 4 As shown, the working principle of the short-circuit protection module 12 is as follows:

[0104] (1) When the power line 112 and the ground line 111 are not short-circuited, that is, when VCC and the ground line 111 are not short-circuited in the figure, the internal circuit of the control device 2 works normally, the third transistor T3 is turned on, so the first transistor T1 is turned on, and the first branch is turned on. Since the voltage across the C (collector) and E (emitter) terminals of the first transistor T1 is low, the Zener diode DZ is turned off, so the second transistor T2 and the fourth transistor T4 are both turned off, and the second branch is turned off; the electrical connection between the power line 112 and the control device 2 is maintained.

[0105] (2) When power line 112 and ground line 111 are short-circuited, i.e., when VCC is short-circuited to ground in the diagram, i.e., when the output terminal experiences overcurrent or short circuit for some reason, the voltage difference between the collector (C) and emitter (E) of the first transistor T1 exceeds the conduction value of the Zener diode DZ and the LED. Current then flows through the base of the second transistor T2, causing it to switch from cutoff to conduction. The fourth transistor T4 then conducts, causing the third transistor T3 and the first transistor T1 to both turn off. The power supply (VCC) has no output, thus disconnecting the electrical connection between power line 112 and control device 2. At this time, the LED is lit due to conduction, serving as a warning.

[0106] Furthermore, when the control device 2 detects a power failure, it can output a power failure signal to the background.

[0107] The short-circuit protection module 12 provided in this application embodiment disconnects the electrical connection between the power line 112 and the control device 2 when the power line 112 and the ground line 111 are short-circuited, preventing condensed water droplets from entering the internal circuit of the control device 2 through the opening and / or gap, thus avoiding the occurrence of faults. It can also alert the administrator that a short circuit has occurred so that it can be investigated in time.

[0108] In some embodiments, the protection unit 1 further includes an alarm module 13. The alarm module 13 is connected to the short-circuit trigger module 11 and is configured to be electrically connected to the control device 2, providing an alarm indication when the power line 112 and the ground line 111 are short-circuited.

[0109] In some embodiments, such as Figure 5 As shown, the warning module 13 includes: a third branch 131, a fourth branch 132, and a storage module 133;

[0110] The third branch 131 and the fourth branch 132 are connected in parallel; both the third branch 131 and the fourth branch 132 are electrically connected between the second node N2 and the storage module 133; wherein, the second node N2 is electrically connected to the power line 112 and the control device 2.

[0111] The third branch 131 includes a diode D1, and the fourth branch 132 includes a second light-emitting element D2;

[0112] The third branch 131 is configured such that when the power line 112 and the ground line 111 are not short-circuited, the diode is turned on, the third branch 131 is turned on, the storage module 133 is charged, and the fourth branch 132 is turned off.

[0113] The fourth branch 132 is configured such that when the power line 112 and the ground line 111 are short-circuited, the storage module 133 discharges, the second light-emitting element is turned on, and the fourth branch 132 is turned on while the third branch 131 is turned off.

[0114] Optionally, the storage module 133 includes a capacitor C, and the second light-emitting element D2 includes a light-emitting diode.

[0115] Optionally, the third branch 131 further includes a seventh resistor R7, and the fourth branch 132 further includes an eighth resistor R8. The seventh resistor R7 is electrically connected between the second node N2 and the anode of the diode D1, and the cathode of the diode D1 is electrically connected to the positive terminal of the capacitor C. The eighth resistor R8 is electrically connected between the second node N2 and the cathode of the second light-emitting element D2, and the anode of the second light-emitting element D2 is electrically connected to the positive terminal of the capacitor C. The negative terminal of the capacitor C is electrically connected to the ground terminal.

[0116] like Figure 5 As shown, the working principle of the warning module 13 is as follows: For example only, assume VCC = 12V.

[0117] (1) When the circuit inside the control device 2 is working normally, that is, when the switch K is open, that is, when VCC and ground line 111 in the figure are not short-circuited, the circuit inside the control device 2 is working normally, the diode D1 is forward-biased, the capacitor C is charged, and the voltage Uc after the capacitor C is fully charged is 12-0.7=11.3V, and the second light-emitting element D2 is cut off.

[0118] (2) When the condensed water droplets short-circuit VCC with ground wire 111, which is equivalent to the switch K being closed, diode D1 is cut off, the second light-emitting element D2 is turned on, capacitor C discharges through the second light-emitting element D2 and the eighth resistor R8, and the second light-emitting element D2 is turned on to emit light.

[0119] The formula for calculating the luminous time t of the second light-emitting element D2 is as follows:

[0120] t=R8C1Ln[(V1-V0) / (V1-Vt)] Expression (1)

[0121] In expression (1), R8 is the resistance value of the eighth resistor R8, and C1 is the capacitance value of capacitor C;

[0122] V1 is the voltage at which capacitor C completely releases its charge, and can be set to 0V.

[0123] Vt is the voltage value on capacitor C at time t, which can be set to 3V (the forward voltage drop when the second light-emitting element D2 is turned on, which can be set to 3V).

[0124] V0 is the initial voltage across the capacitor. Assuming VCC = 12V and the forward voltage across the seventh resistor R7 and diode D1 is 0.7V, then V0 = 12 - 0.7 = 11.3V.

[0125] From the above, we can obtain: t=R8C1 Ln[11.3 / 3]=1.326R8C1.

[0126] It is evident that adjusting the value of R8C1, i.e., adjusting the resistance value of the eighth resistor R8 and the capacitance value of capacitor C, can adjust the illumination time of the second light-emitting element D2. Since the capacitance stored in capacitor C cannot be infinitely large, the illumination time of the second light-emitting element D2 cannot be infinitely long either. When the administrator finds that the monitor 50 is black, they can check whether the second light-emitting element D2 is lit. If it is lit, it indicates that there are condensation droplets, which need to be cleaned before turning on the machine.

[0127] The warning module 13 provided in this embodiment can remind the administrator which power supply (VCC) is in short-circuit protection mode, so as to quickly troubleshoot the cause. Simultaneously, the illumination time can be adjusted. When the administrator finds a black screen, they can check if the LED is lit. If it is lit, it indicates the presence of condensation droplets, which need to be cleaned before turning the device on.

[0128] Based on the same inventive concept, embodiments of this application provide a display 50, such as... Figure 2 and Figure 3 As shown, the door 100 applied to the refrigeration equipment includes: a housing 52, a control device 2, a display panel (not shown), and a protection unit 1 provided in any embodiment of this application.

[0129] The control device 2 is disposed inside the housing 52, which has at least one opening; the short-circuit trigger module 11 of the protection unit 1 is located inside the housing 52, and at least a portion of the power line 112 and at least a portion of the ground line 111 of the short-circuit trigger module 11 are parallel and both exposed metal, and are both configured to be located closer to the opening and / or the gap of the housing 52 than the control device 2; the control device 2 is electrically connected to the display panel.

[0130] Optionally, the display 50 also includes a power supply 4, which is electrically connected to the control device 2 and is used to supply power to the control device 2. The power supply 4 is disposed inside the housing 52.

[0131] Based on the same inventive concept, such as Figure 2 and Figure 3As shown, this application provides a door 100 of a refrigeration device, including an angle measurement module 60, an electric fan 70, and a display 50 provided in any embodiment of this application.

[0132] An angle measurement module 60 is installed on the door 100 of the refrigeration equipment;

[0133] The electric fan 70 is installed inside the housing 52;

[0134] The electric fan 70 and the angle measuring module 60 are both electrically connected to the control unit of the control device 2;

[0135] Angle measurement module 60 is used to sense the orientation of the door 100 of the refrigeration equipment, generate and output the angle signal of the door 100 of the refrigeration equipment;

[0136] The control unit is used to receive angle signals and determine whether the door 100 of the refrigeration equipment is open based on the angle signals. When it is determined that the door 100 of the refrigeration equipment is open, the control unit controls the electric fan 70 to rotate.

[0137] Optionally, the control unit may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a FPGA (Field-Programmable Gate Array), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. The control unit may also be a combination that implements computational functions, such as including one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc.

[0138] Optionally, the angle measurement module 60 includes an angle sensor.

[0139] Optionally, an angle sensor is installed on the door 100 of the refrigeration equipment. The angle sensor can be installed at any position on the door 100. Using this angle sensor, the angle of the door 100 of the refrigeration equipment is monitored in real time, and the measured angle value is transmitted to the control unit of the control device 2.

[0140] Optionally, the angle sensor includes two modules: a digital gyroscope and an accelerometer. The digital gyroscope is used to measure instantaneous angular velocity and cumulative angle; the accelerometer is used to measure instantaneous acceleration.

[0141] Optionally, the angle sensor is mounted on the back panel 51 of the display 50 of the door 100 of the refrigeration equipment.

[0142] Optionally, when the control unit determines, based on the received angle signal, that the door 100 of the refrigeration equipment has been opened to a certain angle, it uses a camera installed on the refrigeration equipment to take a picture of the interior of the refrigeration equipment in order to remotely determine whether the goods inside the refrigeration equipment need to be replenished or adjusted.

[0143] It should be noted that angle sensors are generally used for path recognition, robot autonomous navigation, vehicle navigation, medical guide rail applications, balance detection of self-balancing vehicles, etc.

[0144] Optionally, once the door 100 of the refrigeration equipment is opened, the angle of the door will change. The angle sensor can detect this change. When the control unit receives the angle change value from the angle sensor, it determines that the door is open and immediately starts the internal electric fan 70. This can enhance air circulation inside the display 50, reduce condensation, and increase evaporation.

[0145] When hot air comes into contact with a cooler surface, if the local surface temperature drops to the condensation point (also known as the dew point), the water vapor in the air will naturally condense into small water droplets. At this point, if an electric fan is used to increase airflow, it can increase the rate of heat transfer from the surface, thus raising the surface temperature more quickly. Airflow also reduces the time it takes for the air to condense, decreasing the probability of water droplets forming.

[0146] To ensure sufficient airflow to prevent condensation, in some embodiments, the control unit is also configured to control the rotation time and speed of the electric fan 70.

[0147] Optionally, the door 100 of the refrigeration equipment provided in this application embodiment may further include a temperature sensor electrically connected to the control device 2, for monitoring the temperature of the control unit of the control device 2, generating and outputting a temperature monitoring signal. The control unit determines whether the door 100 of the refrigeration equipment is open based on the temperature monitoring signal, and when it is determined that the door 100 of the refrigeration equipment is open, it controls the electric fan 70 to rotate.

[0148] Optionally, when the temperature of the control unit is determined to reach a first preset value, the electric fan 70 is controlled to rotate.

[0149] The embodiments of this application can enhance the air circulation inside the display 50, reduce condensation, increase evaporation, and prevent condensation droplets from entering the internal circuit of the control device 2.

[0150] Based on the same inventive concept, this application provides a refrigeration device, including the door 100 of the refrigeration device provided in any of the above embodiments of this application.

[0151] Alternatively, refrigeration equipment may include refrigerators, freezers, etc.

[0152] Optionally, when the refrigeration equipment is a refrigerator, the door 100 of the refrigeration equipment is a refrigerator door.

[0153] Optionally, the refrigeration equipment may also include at least one of a microphone, camera, photoelectric sensor, and door opening / closing sensor, which, through the cooperation of hardware and software such as TOF (Time of Flight, which calculates distance by the time it takes for light to travel) technology and a display, form a complete smart retail solution.

[0154] The refrigeration device provided in this application has the same inventive concept and the same beneficial effects as the embodiments described above. For the contents of the refrigeration device not shown in detail, please refer to the embodiments described above, and they will not be repeated here.

[0155] Based on the same inventive concept, this application provides a protection method for a display 50, which is applied to the door 100 of the refrigeration equipment provided in any of the above embodiments of this application, such as... Figure 6 As shown, the protection method for display 50 includes:

[0156] Step S1: Receive the door angle signal of the refrigeration equipment;

[0157] Step S2: Determine whether the door of the refrigeration equipment is open based on the angle signal;

[0158] Step S3: When it is determined that the door of the refrigeration equipment is open, control the electric fan to rotate.

[0159] By applying the embodiments of this application, at least the following beneficial effects can be achieved:

[0160] (1) In this embodiment of the application, an angle measuring module 60 is set on the door 100 of the refrigeration equipment. The angle measuring module 60 is used to monitor the angle of the door 100 of the refrigeration equipment in real time. When the angle of the door 100 of the refrigeration equipment changes (or changes to a certain value), it is determined that the door 100 of the refrigeration equipment is opened. The electric fan 70 inside the door 100 of the refrigeration equipment is immediately started to enhance the air circulation inside the display 50, reduce condensation, increase evaporation, and prevent condensate droplets from entering the internal circuit of the control device 2.

[0161] (2) If condensed water droplets enter the internal circuit of the control device 2 through the opening, the protection unit 1 provided in this application embodiment can be used. The protection unit 1 is applied to the display 50 on the door 100 of the refrigeration equipment. When condensed water droplets on the back panel 51 of the display 50 on the door 100 of the refrigeration equipment enter the interior of the housing 52 of the display 50 through the opening of the housing 52, the protection unit 1 can short-circuit the power line 112 and the ground line 111 of the short-circuit trigger module 11 by having at least a portion of the power line 112 and at least a portion of the ground line 111 parallel and exposed metal, and both configured to be located closer to the opening and / or gap of the housing 52 than the control device 2. The condensed water droplets will first short-circuit the power line 112 and the ground line 111, thereby triggering the short-circuit protection module 12 to disconnect the power line 112 from the control device 2, that is, disconnect the power line 112 from the internal circuit of the housing 52, preventing the condensed water droplets from entering the internal circuit of the control device 2 through the opening and / or gap, thereby avoiding the occurrence of display 50 failure.

[0162] (3) The short-circuit protection module 12 can utilize the existing short-circuit protection module 12 of the control device 2 to achieve overcurrent protection without additional cost, thus achieving automatic protection. This can effectively solve the problem of short-circuit faults caused by condensate on the display 50 on the door 100 of the refrigeration equipment, and is a better protection method for the display 50 on the door 100 of the refrigeration equipment in the usage scenario.

[0163] (4) When the short-circuit trigger module 11 is activated, i.e., when the automatic protection mechanism is triggered, the display 50 will enter the protection state and the screen will be black. In order to help the manager quickly determine whether it is a power short circuit (including condensate short circuit) protection, this application embodiment also adds an alarm module 13 to remind the manager which power supply (VCC) is in the short circuit protection state so as to quickly find out the cause.

[0164] In summary, the protection unit, display and its protection method, door of the refrigeration equipment, and refrigeration equipment provided in this application embodiment utilize the angle measurement module to interact with the electric fan installed inside the box, and set a short-circuit trigger module near the opening and / or gap, and set an overcurrent short-circuit protection (short-circuit protection module) mechanism, which solves the short-circuit problem of the display on the door of the refrigeration equipment, with low cost and high feasibility.

[0165] Those skilled in the art will understand that the steps, measures, and solutions in the various operations, methods, and processes discussed in this application can be alternated, modified, combined, or deleted. Furthermore, other steps, measures, and solutions in the various operations, methods, and processes discussed in this application can also be alternated, modified, rearranged, decomposed, combined, or deleted. Furthermore, steps, measures, and solutions in the prior art that are similar to those disclosed in this application can also be alternated, modified, rearranged, decomposed, combined, or deleted.

[0166] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0167] It should be understood that although the steps in the flowcharts of the accompanying figures are shown sequentially as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the accompanying figures may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0168] The above description is only a partial embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A protection unit, characterized in that, A display for use on the door of a refrigeration device, the protection unit comprising: a short-circuit trigger module including a power line and a ground line, configured to be electrically connected to a control device, wherein at least a portion of the power line and at least a portion of the ground line are parallel and both exposed metal, and both are configured to be located at an opening and / or gap closer to the housing than the control device; the display comprising the housing and the control device, the control device being disposed within the housing, and the housing having at least one of the openings; A short-circuit protection module is electrically connected to the short-circuit trigger module and configured to be electrically connected to the control device. When the power line and the ground line are short-circuited, the power line is disconnected from the control device. The short-circuit protection module includes: a first branch and a second branch, both of which are electrically connected between the power line and the control device; the first branch is configured to conduct when the power line and the ground line are not short-circuited, thereby cutting off the second branch and maintaining the electrical connection between the power line and the control device. The second branch is configured to conduct when the power line and the ground line are short-circuited, thereby cutting off the first branch and disconnecting the electrical connection between the power line and the control device. It also includes an angle measurement module and an electric fan. The angle measurement module is installed on the door of the refrigeration equipment to sense the orientation of the door and generate and output the angle signal of the door. The electric fan is installed inside the display housing. The electric fan and the angle measurement module are electrically connected to the control unit of the control device. The control unit is used to receive the angle signal and determine whether the door of the refrigeration equipment is open based on the angle signal. When it is determined that the door of the refrigeration equipment is open, it controls the electric fan to rotate.

2. The protection unit according to claim 1, characterized in that, The power line, the ground line, and the control device are mounted on the same circuit board, and the power line and the ground line are wound around the periphery of the control device.

3. The protection unit according to claim 2, characterized in that, The power line and the ground line are located at the edge of the circuit board.

4. The protection unit according to claim 1, characterized in that, The short-circuit protection module is mounted on the circuit board of the control device, or it can be mounted separately on another circuit board.

5. The protection unit according to claim 1, characterized in that, The first branch includes a first switch module and a third switch module; the control terminal of the third switch module is electrically connected to the first node, the first terminal of the third switch module is electrically connected to the control terminal of the first switch module, the second terminal of the first switch module is electrically connected to the first node, and the first terminal of the first switch module is electrically connected to the control device. The second branch includes a voltage regulator module, a second switch module, and a fourth switch module; the first end of the voltage regulator module is electrically connected to the first end of the first switch module, the second end of the voltage regulator module is electrically connected to the control end of the second switch module, the second end of the second switch module is electrically connected to the first node, the first end of the second switch module is electrically connected to the control end of the fourth switch module, and the first end of the fourth switch module is electrically connected to the first node. The first node is electrically connected to the power line; The second terminal of the third switch module and the second terminal of the fourth switch module are both electrically connected to the ground terminal.

6. The protection unit according to claim 5, characterized in that, The second branch also includes: a first light-emitting element; the two ends of the first light-emitting element are electrically connected to the second end of the voltage regulator module and the control end of the second switch module, respectively.

7. The protection unit according to claim 6, characterized in that, The first light-emitting element is a light-emitting diode; the cathode and anode of the light-emitting diode are electrically connected to the second terminal of the voltage regulator module and the control terminal of the second switch module, respectively.

8. The protection unit according to claim 1, characterized in that, Also includes: The warning module, together with the short-circuit trigger module, is configured to be electrically connected to the control device and provides a warning indication when the power line and the ground line are short-circuited.

9. The protection unit according to claim 8, characterized in that, The warning module includes: a third branch, a fourth branch, and a storage module; The third branch and the fourth branch are connected in parallel; both the third branch and the fourth branch are electrically connected between the second node and the storage module; wherein the second node is electrically connected to the power line and the control device; The third branch includes a diode, and the fourth branch includes a second light-emitting element; The third branch is configured such that when the power line and the ground line are not short-circuited, the diode is turned on, the third branch is turned on, the storage module is charged, and the fourth branch is turned off. The fourth branch is configured such that when the power line and the ground line are short-circuited, the storage module discharges, the second light-emitting element turns on, the fourth branch is turned on, and the third branch is turned off.

10. A display, characterized in that, Applied to the door of refrigeration equipment, comprising: a housing, a control device, a display panel, and a protection unit as described in any one of claims 1-9; The control device is disposed inside the housing, and the housing has at least one opening; the short-circuit trigger module of the protection unit is located inside the housing, and at least a portion of the power line and at least a portion of the ground line of the short-circuit trigger module are parallel and exposed metal, and are configured to be located closer to the opening and / or the gap of the housing than the control device; the control device is electrically connected to the display panel.

11. A door for a refrigeration device, characterized in that, Includes the display as described in claim 10.

12. The door of the refrigeration equipment according to claim 11, characterized in that, The control unit is also configured to control the rotation time and rotation speed of the electric fan.

13. A refrigeration device, characterized in that, The door of the refrigeration equipment as described in any one of claims 11-12.

14. A method for protecting a display, applied to the door of a refrigeration device according to any one of claims 11-12, characterized in that, include: Receive the door angle signal of the refrigeration equipment; The angle signal is used to determine whether the door of the refrigeration equipment is open; when it is determined that the door of the refrigeration equipment is open, the electric fan is controlled to rotate.

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