CN215911166U

CN215911166U - Protection unit, display, refrigeration plant's door and refrigeration plant

Info

Publication number: CN215911166U
Application number: CN202121724409.XU
Authority: CN
Inventors: 严韶明
Original assignee: BOE Technology Group Co Ltd; Beijing BOE Display Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Beijing BOE Display Technology Co Ltd
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2022-02-25
Anticipated expiration: 2031-07-27

Abstract

The embodiment of the application provides a protection unit, a display, a door of refrigeration equipment and the refrigeration equipment. The protection unit is applied to a display on a door of a refrigeration appliance, the protection unit comprising: the short circuit protection device comprises a short circuit trigger module and a short circuit protection module, wherein the short circuit trigger module comprises a power line and a ground line and is configured to be electrically connected with the control device, at least part of the power line and at least part of the ground line are parallel and are exposed out of metal, and are both configured to be positioned at an opening and/or a gap which is closer to the box body than the control device; the display comprises the box body and the control device, the control device is arranged in the box body, and the box body is provided with at least one opening; the short-circuit protection module is electrically connected with the short-circuit trigger module and is configured to be electrically connected with the control device, and when the power line and the ground line are in short circuit, the power line is disconnected from the control device, so that display faults are avoided.

Description

Protection unit, display, refrigeration plant's door and refrigeration plant

Technical Field

The application relates to the technical field of display, in particular to a protection unit, a display, a door of refrigeration equipment and the refrigeration equipment.

Background

The refrigeration equipment can comprise a refrigerator, an ice chest and the like, a door of the refrigeration equipment is arranged between the refrigeration equipment and the external environment, the temperature difference between the inside and the outside of the door of the refrigeration equipment is large in the indoor environment, when the saturated vapor pressure of the external air is large, the water vapor in the air can be condensed into water drops on the inner side of the door of the refrigeration equipment in the opening moment, and the water drops flow downwards along the inner wall of the door of the refrigeration equipment.

In the prior art, the back panel of a display mounted on the door of a refrigeration appliance faces the inside of the door of the refrigeration appliance. When the door of refrigeration plant is opened, the backplate of display is because of receiving the inside cold air influence of refrigeration plant, and the temperature is lower, and outside hot-air is easy condensation one-tenth drop of water on the backplate of display, and inside the drop of water can get into the box body through the trompil department that sets up at the box body of display, the power and the ground short circuit of the internal circuit of box body caused, lead to the display trouble to take place.

SUMMERY OF THE UTILITY MODEL

This application is directed against the shortcoming of current mode, provides a protection unit for inside the trompil entering box body of the condensation bead that the solution prior art exists on the display backplate passes through the box body, causes the power and the ground short circuit of the internal circuit of box body, thereby leads to the technical problem that the display trouble takes place.

In a first aspect, an embodiment of the present application provides a protection unit, which is applied to a display on a door of a refrigeration device, and includes:

the short circuit triggering module comprises a power line and a ground line and is configured to be electrically connected with the control device, at least part of the power line and at least part of the ground line are parallel and are exposed out of metal, and the power line and the ground line are both configured to be positioned at the position, closer to the opening and/or the gap of the box body than the control device; the display comprises a box body and a control device, wherein the control device is arranged in the box body, and at least one opening is formed in the box body;

and the short-circuit protection module is electrically connected with the short-circuit trigger module and is configured to be electrically connected with the control device, and when the power line and the ground line are in short circuit, the power line is disconnected from the control device.

In one possible implementation, the power line, the ground line and the control device are arranged on the same circuit board, and the power line and the ground line are arranged around the periphery of the control device.

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

In one possible embodiment, the short-circuit protection module is arranged on a circuit board of the control device or on another circuit board separately.

In one possible implementation, the short-circuit protection module includes: the first branch circuit and the second branch circuit are electrically connected between the power line and the control device;

a first branch configured to be turned on when the power supply line and the ground line are not short-circuited, so that the second branch is turned off to maintain electrical connection between the power supply line and the control device;

and the second branch circuit is constructed to be conducted when the power line and the ground line are short-circuited, so that the first branch circuit is cut off, and the power line is electrically disconnected with the control device.

In one possible implementation, the first branch includes a first switch module and a third switch module; the control end of the third switch module is electrically connected with the first node, the first end of the third switch module is electrically connected with the control end of the first switch module, the second end of the first switch module is electrically connected with the first node, and the first end of the first switch module is electrically connected with the control device;

the second branch circuit comprises a voltage stabilizing module, a second switch module and a fourth switch module; the first end of the voltage stabilizing module is electrically connected with the first end of the first switch module, the second end of the voltage stabilizing module is electrically connected with the control end of the second switch module, the second end of the second switch module is electrically connected with the first node, the first end of the second switch module is electrically connected with the control end of the fourth switch module, and the first end of the fourth switch module is electrically connected with the first node;

wherein the first node is electrically connected with a power line;

the second end of the third switch module and the second end of the fourth switch module are both electrically connected with the ground terminal.

In one possible implementation, the second branch further includes: a first light emitting element;

the two ends of the first light-emitting element are respectively and electrically connected with the second end of the voltage stabilizing module and the control end of the second switch module.

In one possible implementation, the first light emitting element is a light emitting diode;

and the cathode and the anode of the light emitting diode are respectively and electrically connected with the second end of the voltage stabilizing module and the control end of the second switch module.

In one possible implementation, the protection unit further includes:

and the warning module is electrically connected with the short circuit triggering module and is configured to be electrically connected with the control device and provide warning indication when the power line and the ground wire are short-circuited.

In one possible implementation, the alert module includes: the device comprises a third branch, a fourth branch and a storage module;

the third branch and the fourth branch are connected in parallel; the third branch and the fourth branch are both electrically connected between the second node and the memory module; the second node is electrically connected with the power line and the control device;

the third branch comprises a diode, and the fourth branch comprises a second light-emitting element;

a third branch 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;

and a fourth branch configured such that when the power supply line and the ground line are short-circuited, the memory module is discharged, the second light emitting element is turned on, the fourth branch is turned on, and the third branch is turned off.

In a second aspect, an embodiment of the present application provides a display applied to a door of a refrigeration device, including: the display device comprises a box body, a control device, a display panel and a protection unit provided by the first aspect of the embodiment of the application;

the control device is arranged in the box body, and at least one opening is formed in the box body; the short circuit trigger module of the protection unit is positioned in the box body, at least part of power lines and at least part of ground lines of the short circuit trigger module are parallel and exposed out of metal, and the short circuit trigger module and the ground lines are configured to be positioned closer to the opening of the box body and/or the gap of the box body than the control device; the control device is electrically connected with the display panel.

In a third aspect, an embodiment of the present application provides a door of a refrigeration device, including an angle measurement module, an electric fan, and the display provided in the second aspect of the embodiment of the present application;

the angle measuring module is arranged on a door of the refrigeration equipment;

the electric fan is arranged in the box body;

the electric fan and the angle measuring module are electrically connected with a control unit of the control device;

the angle measurement module is used for sensing the direction of the door of the refrigeration equipment and generating and outputting an angle signal of the door of the refrigeration equipment;

the control unit is used for receiving the angle signal, determining whether the door of the refrigeration equipment is opened or not according to the angle signal, and controlling the electric fan to rotate when the door of the refrigeration equipment is determined to be opened.

In one possible implementation, the control unit is further configured to control the rotation time and the rotation speed of the electric fan.

In a fourth aspect, embodiments of the present application provide a refrigeration apparatus including a door of the refrigeration apparatus provided in the third aspect of the embodiments of the present application.

The beneficial technical effects brought by the technical scheme provided by the embodiment of the application comprise:

adopt the protection unit that this application embodiment provided, this protection unit is applied to the display on refrigeration plant's the door, this protection unit can be when the condensation drop of water on the display backplate on refrigeration plant's the door, when getting into the box body of display through the trompil of box body inside, at least partial power cord and at least partial ground wire through short circuit trigger module are parallel and all expose the metal, and all be configured to be located the trompil and/or the gap department that is closer to the box body than controlling means, the drop of water that the condensation becomes is earlier the power cord and the ground wire short circuit, thereby trigger short circuit protection module disconnection power cord and controlling means's electric connection, the electric connection of the circuit of disconnection power cord and box body inside promptly, thereby the emergence of display trouble has been avoided.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a protection unit according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a front side of a door of a refrigeration device provided by an embodiment of the present application;

fig. 3 is a schematic structural diagram of a back side of a door of a refrigeration device provided by an embodiment of the present application;

fig. 4 is a schematic circuit diagram of a short-circuit protection module according to an embodiment of the present disclosure;

fig. 5 is a schematic circuit diagram of an alarm module according to an embodiment of the present disclosure.

Reference numerals:

1-protection unit, 11-short circuit trigger module, 111-ground wire, 112-power line, 12-short circuit protection module, 121-first switch module, 122-second switch module, 123-third switch module, 124-fourth switch module, 125-voltage stabilization module, 126-first light-emitting element; 13-warning module, 131-third branch, 132-fourth branch, 133-storage module;

2-a control device;

3-a circuit board;

4-a power supply device;

50-display, 51-back panel, 52-box;

60-an angle measurement module;

70-an electric fan;

100-door of refrigeration equipment.

Detailed Description

Reference will now be made in detail to the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts or parts having the same or similar functions throughout. In addition, if a detailed description of the known art is not necessary for illustrating the features of the present application, it is omitted. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.

The inventor of the application researches and discovers that the existing intelligent Internet of things retail solution is a cloud integrated solution, is composed of products such as an Internet of things public service platform and an Internet of things cloud host terminal, and realizes accurate and efficient retail service through intelligent fusion and data interaction of software and hardware.

The refrigeration device may comprise a refrigeration device which may comprise a refrigerator, freezer or the like, the refrigeration device comprising a door of the refrigeration device, which door of the refrigeration device is a refrigerator door when the refrigeration device is a refrigerator. The following description will be made taking a refrigerator door as an example.

The refrigerator door is between refrigerator and external environment, and under indoor environment, the difference in temperature is great inside and outside the refrigerator door, and when the saturated vapour pressure of outside air was great, the door was opened in the twinkling of an eye, vapor in the air can become the drop of water at the refrigerator door inboard condensation to along the refrigerator door inner wall down flow. Because the PC board card (i.e. control device) in operation generates heat obviously, the local temperature can reach 90 ℃.

In order to achieve a better heat dissipation effect, a display on a refrigerator door in the prior art is designed with a display module and a system control box in a split mode, and a plurality of heat dissipation holes (namely holes) are reserved around the system control box (namely the front, rear, left and right surfaces of the system control box without a cover on the system control box). When the drop of water of condensation flows down gradually to the system control box, the drop of water can get into inside the system control box through louvre (being the trompil), reachs PC integrated circuit board (being controlling means) surface, causes power and ground short circuit, and then damages PC integrated circuit board (being controlling means).

In addition, the inventor of the present application has found that gaps are also inevitable at the joints between the upper cover of the system control box (i.e., the cover above the system control box) and the periphery of the system control box (i.e., the front, rear, left, and right surfaces of the system control box, excluding the cover above). Because the PC board card (i.e. the control device) has a plurality of interfaces, the interfaces of the PC board card are connected with external equipment through wires (which can comprise power lines, signal lines and the like), and condensed water drops easily flow into the circuit board card inside the system control box along the wires from the openings or gaps.

The application provides a protection unit, display, refrigeration plant's door and refrigeration plant, aims at solving prior art technical problem as above.

The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments.

The embodiment of the present application provides a protection unit 1, as shown in fig. 1 to 3, where the protection unit 1 is applied to a display 50 on a door 100 of a refrigeration apparatus, and the protection unit 1 includes: a short circuit triggering module 11 and a short circuit protection module 12.

Specifically, the short circuit triggering 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 exposed out of metal, and both are configured to be located at an opening and/or a gap closer to the case 52 than the control device 2; the display 50 comprises a box 52 and the control device 2, the control device 2 is arranged in the box 52, and at least one opening is arranged on the box 52; the short-circuit protection module 12 is electrically connected to the short-circuit triggering module 11 and configured to be electrically connected to the control device 2, and when the power line 112 and the ground line 111 are short-circuited, the power line 112 is electrically disconnected from the control device 2.

It should be noted that the refrigeration device may include a refrigerator, an ice chest, etc., and the refrigerator may be a household refrigerator or a commercial refrigerator. Commercial refrigerators include refrigerator dispensers and the like.

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

Alternatively, the control device 2 may be a PC board.

Optionally, at least part of the power supply line 112 and at least part of the ground line 111 are parallel and both expose copper.

It should be noted that, at present, a mature short-circuit protection circuit technology exists, and many power chips are provided with a short-circuit protection circuit. The short-circuit protection module 12 may or may not be already provided in the control device 2.

Alternatively, when the short-circuit protection module 12 is already provided in the control device 2, the short-circuit protection module 12 may be the short-circuit protection module 12 already provided in the control device 2.

Alternatively, when the short-circuit protection module 12 is not provided in the control device 2, the short-circuit protection module 12 may be a short-circuit protection module 12 that is designed separately. The present application is not particularly limited.

With the protection unit 1 provided by the embodiment of the application, the protection unit 1 is applied to the display 50 on the door 100 of the refrigeration equipment, when the water drops condensed on the back plate 51 of the display 50 on the door 100 of the refrigeration equipment enter the box 52 of the display 50 through the opening of the box 52, at least part of the power line 112 and at least part of the ground line 111 of the short circuit triggering module 11 are parallel and metal is exposed, and the protection unit 1 is configured to be located closer to the opening and/or the gap of the box 52 than the control device 2, the condensed water drops firstly short circuit the power line 112 and the ground line 111, so as to trigger the short circuit protection module 12 to disconnect the electrical connection between the power line 112 and the control device 2, that is, disconnect the electrical connection between the power line 112 and the circuit inside the box 52, and avoid the occurrence of the fault of the display 50.

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 disposed around the periphery of the control device 2 to surround the internal circuit of the control device 2. The condensed water droplets flowing from the outside are short-circuited between the power supply and the ground before flowing into the control device 2.

In some embodiments, as shown in fig. 1, the power and

ground lines

112, 111 are located at the edge of the circuit board 3. So that the condensed water droplets flowing from the outside are short-circuited between the power supply and the ground before flowing into the control device 2.

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

Alternatively, as shown in fig. 1, the power line 112, the ground line 111, the control device 2, and the short-circuit protection module 12 are all disposed on the same circuit board 3. The power supply line 112 and the ground line 111 are located closer to the opening and/or the slit of the case 52 than the control device 2; that is, the power supply line 112 and the ground line 111 are provided in the area corresponding to the opening and/or the slit of the case 52, that is, on the edge of the circuit board 3 card (the circuit board 3 of the control device 2) inside the case 52, the power supply line 112 (the positive electrode of the power supply outputted from the power supply device 4) and the ground line 111 on the circuit board 3 are designed to be parallel and both exposed with copper and elongated so as to surround the internal circuit on the circuit board 3, corresponding to the area of the opening.

If water drops enter the internal circuit board 3, before entering the internal circuit of the circuit board 3, the power supply and the ground at the edge of the circuit board 3 are short-circuited to trigger protection, that is, the short-circuit protection module 12 is triggered to work, so as to protect the internal circuit of the box 52.

Note that, the conventional design of the PCB (Printed Circuit Board), i.e., the Circuit Board 3, is: a Ground line 111(Ground) is designed at the extreme edge of the circuit board 3 to protect the internal circuit and improve EMC (electromagnetic compatibility) and ESD (electrostatic discharge) performance. The power line 112 and the ground line 111 are designed side by side at the edge of the PCB (circuit board 3) as shown in fig. 1, and only the design of the power line 112 needs to be added in the current conventional PCB layout.

When the short-circuit protection module 12 is not provided in the control device 2, the short-circuit protection module 12 may be a short-circuit protection module 12 that is designed separately.

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

a first branch configured to be turned on when the power supply line 112 and the ground line 111 are not short-circuited, so that a second branch is turned off, maintaining electrical connection between the power supply line 112 and the control device 2;

and a second branch configured to be turned on when the power supply line 112 and the ground line 111 are short-circuited, so that the first branch is turned off, and the electrical connection between the power supply line 112 and the control device 2 is broken.

In some embodiments, as shown in fig. 4, the first branch includes a first switching module 121 and a third switching module 123; a control end of the third switching module 123 is electrically connected to the first node N1, a first end of the third switching module 123 is electrically connected to a control end of the first switching module 121, a second end of the first switching module 121 is electrically connected to the first node N1, and a first end of the first switching module 121 is electrically connected to the control device 2;

the second branch comprises a voltage stabilization module 125, a second switching module 122 and a fourth switching module 124; a first end of the voltage stabilizing module 125 is electrically connected to a first end of the first switch module 121, a second end of the voltage stabilizing module 125 is electrically connected to a control end of the second switch module 122, a second end of the second switch module 122 is electrically connected to a first node N1, a first end of the second switch module 122 is electrically connected to a control end of the fourth switch module 124, and a first end of the fourth switch module 124 is electrically connected to a first node N1; the first node N1 is electrically connected to the power line 112;

the second terminal of the third switching module 123 and the second terminal of the fourth switching module 124 are electrically connected to the ground terminal.

In fig. 4 and 5, VCC is connected to the power line 112, and the outputs of the short-circuit protection module 12 and the alarm module 13 are all electrically connected to the control device 2. VCC is a power supply voltage of an operating voltage supplied from the power supply device 4 to the control device 2, and may be, for example, 5V (volt), 12V, 24V, or the like. Of course, VCC may also be a voltage value required for other adaptation uses.

Optionally, as shown in fig. 4, the first switch module 121 includes a first transistor T1, and a control electrode, a first electrode, and a second electrode of the first transistor T1 are respectively used as a control terminal, a first terminal, and a second terminal of the first switch module 121; the second switch module 122 includes a second transistor T2, and a control electrode, a first electrode, and a second electrode of the second transistor T2 are respectively used as a control terminal, a first terminal, and a second terminal of the second switch module 122; the third switching module 123 includes a third transistor T3, and a control electrode, a first electrode, and a second electrode of the third transistor T3 are respectively used as a control end, a first end, and a second end of the third switching module 123; the fourth switching module 124 includes a fourth transistor T4, and a control electrode, a first electrode and a second electrode of the fourth transistor T4 are respectively used as a control terminal, a first terminal and a second terminal of the fourth switching module 124; the voltage regulation module 125 includes a voltage regulation diode DZ, and an anode and a cathode of the voltage regulation diode DZ are respectively used as a first end and a second end of the voltage regulation module 125.

When the power line 112 and the ground line 111 are not short-circuited, the third switching module 123 is turned on, so that the first switching module 121 is turned on, and thus the first branch is turned on, so that the voltage stabilizing module 125, the second switching module 122 and the fourth switching module 124 are all turned off, and the second branch is turned off;

when the power line 112 and the ground line 111 are shorted, the voltage stabilizing module 125 is turned on, so that the second switch module 122 and the fourth switch module 124 are both turned on, the second branch is turned on, the first switch module 121 and the third switch module 123 are both turned off, and the first branch is turned off.

In some embodiments, as shown in fig. 4, the second branch further comprises: a first light emitting element 126; two ends of the first light emitting element 126 are electrically connected to the second end of the voltage stabilizing module 125 and the control end of the second switch module 122, respectively.

In some embodiments, as shown in fig. 4, the first light emitting element 126 is a light emitting diode, LED; the cathode and the anode of the light emitting diode LED are respectively electrically connected to the second end of the voltage regulator module 125 and the control end of the second switch module 122.

In some embodiments, continuing with fig. 4, the short-circuit protection module 12 further comprises: the circuit comprises 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 type triodes, and the third transistor T3 and the fourth transistor T4 are both NPN type triodes.

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 with the base of the second transistor T2 at the first node N1; 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; the sixth resistor R6 is electrically connected between the anode of the zener diode DZ and the collector of the first transistor T1.

As shown in fig. 4, the short-circuit protection module 12 works as follows:

(1) when the power line 112 and the ground line 111 are not short-circuited, that is, VCC and the ground line 111 are not short-circuited in the figure, the circuit inside the control device 2 normally operates, the third transistor T3 is turned on, so that the first transistor T1 operates in an on state, and thus the first branch is turned on, and the zener diode DZ is turned off due to the low voltage across C (collector) and E (emitter) of the first transistor T1, so that the second transistor T2 and the fourth transistor T4 are both turned off, and the second branch is turned off; electrical connection between the power supply line 112 and the control device 2 is maintained.

(2) When the power line 112 and the ground line 111 are short-circuited, that is, VCC is short-circuited to ground in the figure, that is, when the output terminal is over-current or short-circuited for some reason, so that the voltage difference between C (collector) and E (emitter) of the first transistor T1 is greater than the on values of the zener diode DZ and the light emitting diode LED, a current flows through the base of the second transistor T2, the second transistor T2 is turned from off to on, the fourth transistor T4 is turned on, so that the third transistor T3 and the first transistor T1 are both turned off, and the power supply (VCC in the figure) has no output, that is, the power line 112 and the control device 2 are electrically disconnected. At this time, the light emitting diode LED is turned on due to conduction, and thus, it is used for warning.

Further, when the control device 2 detects a power failure, a power failure signal may be output to the background.

The short-circuit protection module 12 provided by the embodiment of the application, when the power line 112 and the ground line 111 are short-circuited, the power line 112 and the control device 2 are disconnected from each other, so that water drops condensed are prevented from entering the internal circuit of the control device 2 through the open holes and/or the gaps, the occurrence of faults is avoided, and a manager can be reminded of the occurrence of short circuit, so that the short circuit can be checked in time.

In some embodiments, the protection unit 1 further comprises an alert module 13. The warning module 13 is connected to the short circuit triggering module 11 and configured to be electrically connected to the control device 2, and provide a warning indication when the power line 112 and the ground line 111 are short-circuited.

In some embodiments, as shown in fig. 5, the alert module 13 includes: a third branch 131, a fourth branch 132 and a storage module 133;

the third branch 131 and the fourth branch 132 are connected in parallel; the third branch 131 and the fourth branch 132 are both electrically connected between the second node N2 and the memory module 133; the second node N2 is electrically connected to the power line 112 and the control device 2;

the third branch 131 comprises a diode D1, and the fourth branch 132 comprises a second light emitting element D2;

a third branch 131 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;

and a fourth branch 132 configured such that when the power line 112 and the ground line 111 are shorted, the memory module 133 is discharged, the second light emitting element is turned on, the fourth branch 132 is turned on, and the third branch 131 is turned off.

Alternatively, the storage module 133 includes a capacitor C, and the second light emitting element D2 includes a light emitting diode.

Optionally, the third branch 131 further includes a seventh resistor R7, 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 anode 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 anode of the capacitor C; the negative electrode of the capacitor C is electrically connected with the grounding end.

As shown in fig. 5, the operation principle of the warning module 13 is as follows: for example only, let VCC be 12V.

(1) When the circuit inside the control device 2 normally operates, that is, when the switch K is opened, that is, when VCC is not short-circuited to the ground 111 in the figure, the circuit inside the control device 2 normally operates, the diode D1 is forward-switched on, the capacitor C is charged, the voltage Uc is 12-0.7-11.3V after the capacitor C is fully charged, and the second light emitting element D2 is turned off.

(2) When the condensed water drops short-circuit VCC with the ground 111, i.e. equivalent to when the switch K is closed, the diode D1 is turned off, the second light emitting element D2 is turned on, the 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.

The light emitting time t of the second light emitting element D2 is calculated by the formula

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

In the expression (1), R₈Is the resistance value of the eighth resistor R8, C₁Is the capacitance value of the capacitor C;

v1 is a voltage value at which the capacitor C completely discharges the charge, and can be set to 0V.

Vt is a voltage value of the capacitor C at time t, and may be 3V (a forward voltage drop when the second light emitting element D2 is turned on, and may be 3V).

V0 is the initial voltage on the capacitor, and assuming that VCC is 12V, and the forward conduction voltage across the seventh resistor R7 and the diode D1 is 0.7V, V0 is 12-0.7 is 11.3V.

From the above, it can be obtained: t ═ R₈C₁ Ln[11.3/3]＝1.326R₈C₁。

Visible adjustment of R₈C₁The light emitting time of the second light emitting element D2 can be adjusted by adjusting the resistance value of the eighth resistor R8 and the capacitance value of the capacitor C, and the light emitting time of the second light emitting element D2 cannot be infinitely long because the capacity stored in the capacitor C cannot be infinitely large. When the manager finds that the display 50 is black, he can check whether the second light emitting element D2 is lighted, and if it is lighted, it indicates that there is a condensed water drop, and the computer is turned on after the water drop needs to be cleaned.

The warning module 13 provided by the embodiment of the application can remind a manager which power supply (VCC) is in a short-circuit protection state, so that the reason can be rapidly checked. Meanwhile, the light emitting time can be adjusted. When the manager finds the black screen, the manager can check whether the light-emitting diode is lightened, if the light-emitting diode is lightened, the manager indicates that condensed water drops exist, and the light-emitting diode is started after the water drops need to be cleaned.

Based on the same inventive concept, the present embodiment provides a display 50, as shown in fig. 2 and 3, applied to a door 100 of a refrigeration device, including: a box body 52, a control device 2, a display panel (not shown) and a protection unit 1 provided in any embodiment of the present application;

the control device 2 is arranged in the box body 52, and at least one opening is arranged on the box body 52; the short circuit trigger module 11 of the protection unit 1 is positioned in the box body 52, and at least part of the power line 112 and at least part of the ground line 111 of the short circuit trigger module 11 are parallel and are exposed out of metal and are configured to be positioned closer to the opening of the box body 52 and/or the gap of the box body 52 than the control device 2; the control device 2 is electrically connected to the display panel.

Optionally, the display 50 further comprises a power supply device 4 electrically connected to the control device 2 for supplying power to the control device 2. The power supply device 4 is provided in the case 52.

Based on the same inventive concept, as shown in fig. 2 and 3, an embodiment of the present application provides a door 100 of a refrigeration apparatus, including an angle measuring module 60, an electric fan 70, and a display 50 provided in any embodiment of the present application;

the angle measurement module 60 is arranged on the door 100 of the refrigeration appliance;

the electric fan 70 is provided in the case 52;

the electric fan 70 and the angle measuring module 60 are both electrically connected with the control unit of the control device 2;

the angle measuring module 60 is used for sensing the orientation of the door 100 of the refrigeration equipment, and generating and outputting an angle signal of the door 100 of the refrigeration equipment;

the control unit is used for receiving the angle signal, determining whether the door 100 of the refrigeration equipment is opened or not according to the angle signal, and controlling the electric fan 70 to rotate when the door 100 of the refrigeration equipment is determined to be opened.

Alternatively, 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), an FPGA (Field-Programmable Gate Array) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The control unit may also be a combination performing a computing function, e.g. comprising one or more microprocessors, a combination of DSPs and microprocessors, etc.

Optionally, the angle measurement module 60 includes an angle sensor.

Alternatively, the door 100 of the refrigeration appliance is provided with an angle sensor, and the angle sensor can be arranged at any position on the door 100 of the refrigeration appliance. By means of this angle sensor, the angle of the door 100 of the refrigeration appliance is monitored in real time and the measured angle value is transmitted to the control unit of the control device 2.

Optionally, the angle sensor comprises two modules of a digital gyroscope and an accelerometer. The digital gyroscope is used for measuring instantaneous angular speed and accumulated angle; accelerometers are used to measure instantaneous acceleration.

Optionally, the angle sensor is mounted on the back plate 51 of the display 50 of the door 100 of the refrigeration appliance.

Alternatively, when the control unit determines that the door 100 to the refrigeration apparatus is opened to a certain angle according to the received angle signal, the inside of the refrigeration apparatus is photographed by using a camera installed on the refrigeration apparatus, so as to remotely determine whether the goods in the refrigeration apparatus need to be supplemented or adjusted.

It should be noted that the angle sensor is generally used for path recognition, autonomous robot navigation, vehicle navigation, medical guide rail application, balance car balance detection, and the like.

Alternatively, once the door 100 of the refrigeration device is opened, the angle of the door may change, and the angle sensor can sense the change, and when the control unit receives the change of the angle value of the angle sensor, the control unit determines that the door is opened, and immediately starts the internal electric fan 70. This enhances the air circulation inside the display 50, reduces condensation, and increases evaporation.

When the hot air contacts the surface of an object with a low temperature, if the local temperature of the surface of the object is lower than the condensation temperature (also called dew point temperature) at which water vapor is saturated, the water vapor in the air can be naturally separated out and condensed into small water drops. At this time, if the electric fan 70 enhances the air circulation, the heat transfer speed of the object surface can be increased, and the object surface temperature can be increased as soon as possible; the air circulation can also reduce the time for the air to be condensed and the probability of water drops separated by condensation.

To ensure that the air circulation is sufficient to prevent the formation of condensation, in some embodiments, the control unit is further configured to control the rotation time and rotation speed of the electric fan 70.

Optionally, the door 100 of the refrigeration apparatus provided in the embodiment of the present application 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, and generating and outputting a temperature monitoring signal. The control unit determines whether the door 100 of the cooling device is opened according to the temperature monitoring signal, and controls the electric fan 70 to rotate when it is determined that the door 100 of the cooling device is opened.

Alternatively, when it is determined that the temperature of the control unit reaches the first preset value, the electric fan 70 is controlled to rotate.

The embodiment of the application can strengthen the air circulation inside the display 50, reduce condensation, increase evaporation and prevent condensed water drops from entering the internal circuit of the control device 2.

Based on the same inventive concept, the present application embodiment provides a refrigeration device, including the door 100 of the refrigeration device provided in any one of the above embodiments of the present application.

Alternatively, the refrigeration device may comprise a refrigerator, ice chest, or the like.

Alternatively, when the refrigeration appliance is a refrigerator, the door 100 of the refrigeration appliance is a refrigerator door.

Optionally, the refrigeration device may further include at least one of a microphone, a camera, a photoelectric sensor, and a door opening and closing sensor, and a complete set of intelligent retail solution is formed by interworking hardware and software such as TOF (Time of flight, i.e., calculating distance by Time of flight of light) technology, a display, and the like.

The refrigeration device provided by the embodiment of the present application has the same inventive concept and the same beneficial effects as the embodiments described above, and the details that are not shown in detail in the refrigeration device may refer to the embodiments described above, and are not described again here.

By applying the embodiment of the application, at least the following beneficial effects can be realized:

(1) this application embodiment is through setting up angle measurement module 60 on refrigeration plant's door 100, utilize this angle measurement module 60 real-time supervision refrigeration plant's door 100 angle, when refrigeration plant's door 100 angle changes to arrive (or when changing to a definite value), judge promptly that refrigeration plant's door 100 is opened, start refrigeration plant's door 100 inside electric fan 70 immediately, strengthen the inside circulation of air of display 50, reduce the condensation, increase the evaporation, prevent to have the internal circuit that condensation drop got into controlling means 2.

(2) If condensed water drops enter the internal circuit of the control device 2 through the opening, the protection unit 1 provided in the embodiment of the present application may be adopted, the protection unit 1 is applied to the display 50 on the door 100 of the refrigeration equipment, the protection unit 1 is capable of exposing metal through at least part of the power line 112 and at least part of the ground line 111 of the short circuit triggering module 11 in parallel when the condensed water drops on the back plate 51 of the display 50 on the door 100 of the refrigeration equipment enter the box 52 of the display 50 through the opening of the box 52, and both are configured to be located closer to the opening and/or the gap of the box 52 than the control device 2, the condensed water drops first short circuit the power line 112 and the ground line 111, so as to trigger the short circuit triggering module 12 to disconnect the electrical connection between the power line 112 and the control device 2, i.e. disconnect the electrical connection between the power line 112 and the internal circuit of the box 52, the condensed water droplets are prevented from entering the internal circuit of the control device 2 through the openings and/or slits, thereby preventing the malfunction of the display 50.

(3) The short-circuit protection module 12 can realize an overcurrent protection function by using the existing short-circuit protection module 12 of the control device 2, and automatic protection can be realized without additionally increasing the cost. Therefore, the problem of short-circuit fault caused by condensed water of the display 50 on the door 100 of the refrigeration equipment can be well solved, and the method is a better protection method in the use scene of the display 50 on the door 100 of the refrigeration equipment.

(4) When the short circuit triggering module 11 is activated, i.e. triggers the automatic protection mechanism, the display 50 enters a protection state, and the screen is displayed as a black screen. In order to help a manager to rapidly judge whether the power supply short circuit (including condensate short circuit) protection is performed, a warning module 13 is further added in the embodiment of the application to remind the manager which power supply (VCC) is in a short circuit protection state, so that the reason can be rapidly checked.

To sum up, the protection unit, the display, the door of the refrigeration equipment and the refrigeration equipment provided by the embodiment of the application utilize the angle measurement module to be used with the electric fan arranged in the box body in an interactive manner, and the short circuit triggering module is arranged at the position close to the opening and/or the gap, and an overcurrent short circuit protection (short circuit protection module) mechanism is arranged, so that the problem of short circuit of the display on the door of the refrigeration equipment is solved, and the protection unit, the display, the door of the refrigeration equipment and the refrigeration equipment are low in cost and high in feasibility.

Those of skill in the art will appreciate that the various operations, methods, steps in the processes, acts, or solutions discussed in this application can be interchanged, modified, combined, or eliminated. Further, other steps, measures, or schemes in various operations, methods, or flows that have been discussed in this application can be alternated, altered, rearranged, broken down, combined, or deleted. Further, steps, measures, schemes in the prior art having various operations, methods, procedures disclosed in the present application may also be alternated, modified, rearranged, decomposed, combined, or deleted.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and may be performed in other orders unless explicitly stated herein. Moreover, at least a portion of the steps in the flow chart of the figure may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least a portion of the sub-steps or stages of other steps.

The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.

Claims

1. A protection unit, characterized by a display applied to a door of a refrigeration appliance, said protection unit comprising:

the short circuit triggering module comprises a power line and a ground line and is configured to be electrically connected with the control device, at least part of the power line and at least part of the ground line are parallel and exposed out of metal, and are configured to be positioned at an opening and/or a gap which is closer to the box body than the control device; the display comprises the box body and the control device, the control device is arranged in the box body, and the box body is provided with at least one opening;

2. The protection unit of claim 1, wherein the power line, the ground line and the control device are disposed on a same circuit board, the power line and the ground line being disposed around a periphery of the control device.

3. The protection unit of claim 2, wherein the power and ground wires are located at an edge of the circuit board.

4. Protection unit according to claim 1,

the short-circuit protection module is arranged on a circuit board of the control device or is independently arranged on another circuit board.

5. The protection unit of claim 1, wherein the short-circuit protection module comprises: a first branch and a second branch, both of which are electrically connected between the power line and the control device;

the first branch circuit is configured to be conducted when the power supply line and the ground line are not short-circuited, so that the second branch circuit is cut off, and the electric connection between the power supply line and the control device is maintained;

the second branch circuit is configured to be conducted when the power supply line and the ground line are short-circuited, so that the first branch circuit is cut off, and the power supply line and the control device are electrically disconnected.

6. The protection unit according to claim 5,

the first branch comprises a first switch module and a third switch module; the control end of the third switch module is electrically connected with the first node, the first end of the third switch module is electrically connected with the control end of the first switch module, the second end of the first switch module is electrically connected with the first node, and the first end of the first switch module is electrically connected with the control device;

wherein the first node is electrically connected to the power line;

and the second end of the third switch module and the second end of the fourth switch module are both electrically connected with a ground terminal.

7. The protection unit of claim 6, wherein the second branch further comprises: a first light emitting element;

and two ends of the first light-emitting element are respectively and electrically connected with the second end of the voltage stabilizing module and the control end of the second switch module.

8. The protection unit according to claim 7, wherein the first light emitting element is a light emitting diode;

9. The protection unit of claim 1, further comprising:

and the warning module is electrically connected with the short circuit triggering module and is configured to be electrically connected with the control device, and when the power line and the ground line are in short circuit, a warning indication is provided.

10. The protection unit of claim 9, wherein the alert module comprises: the device comprises a third branch, a fourth branch and a storage module;

the third branch and the fourth branch are connected in parallel; the third branch and the fourth branch are both electrically connected between a second node and the memory module; wherein the second node is electrically connected with the power line and the control device;

the third branch circuit is configured to conduct the diode when the power line and the ground line are not short-circuited, conduct the third branch circuit, charge the storage module, and shut off the fourth branch circuit;

the fourth branch is configured such that when the power line and the ground line are short-circuited, the memory module is discharged, the second light emitting element is turned on, the fourth branch is turned on, and the third branch is turned off.

11. A display for use on a door of a refrigeration appliance, comprising: a cartridge, a control device, a display panel and a protection unit according to any one of claims 1 to 10;

the control device is arranged in the box body, and at least one opening is formed in the box body; the short circuit trigger module of the protection unit is positioned in the box body, at least part of power lines and at least part of ground lines of the short circuit trigger module are parallel and exposed out of metal, and the short circuit trigger module and the ground lines are configured to be positioned at the position, closer to the opening of the box body and/or the gap of the box body, than the control device; the control device is electrically connected with the display panel.

12. A door for a refrigeration appliance comprising an angle measuring module, an electric fan, and the display of claim 11;

the electric fan is arranged in the box body;

the angle measuring module is used for sensing the direction of the door of the refrigeration equipment, and generating and outputting an angle signal of the door of the refrigeration equipment;

13. The door for a refrigeration appliance according to claim 12,

the control unit is further configured to control a rotation time and a rotation speed of the electric fan.

14. A refrigeration device comprising a door of a refrigeration device according to any one of claims 12 to 13.