CN102401544A - Refrigerator with door opening delay alarm - Google Patents

Abstract

The invention proposes a refrigerator with a door opening delay alarm, comprising: a box body; a revolving door body; a detection module, which detects the opening state of the revolving door body through the state of the first switch in the detection module and outputs the first opening state signal; the detection delay module detects the opening state of the revolving door body by detecting the state of the second switch in the delay module, and outputs the second opening signal after detecting that the revolving door body is in the open state and delaying the preset time; Alarm; and a control module, the control module is connected to the detection module and the detection delay module, and the control module is used to start all the alarms after detecting the first opening signal output by the detection module and the second opening signal output by the detected delay module. described alarm. The invention can realize the alarm function of the door switch on the mechanical refrigerator, and the production cost is low.

Description

Refrigerator with door open delay alarm

technical field

The invention relates to the technical field of refrigeration equipment design and manufacture, in particular to a refrigerator with a door opening delay alarm.

Background technique

Refrigerators are one of the household electrical appliances commonly used in households, and the frequency of use is generally high, which leads to a relatively high frequency of opening and closing of the door body of the refrigerator. During use, if the door body and the box body are not well-attached, it is easy to cause the door to not be closed tightly. This will lead to a large power consumption of the refrigerator, and the stored food is also prone to deterioration.

Traditional mechanical refrigerators do not need single-chip microcomputers to control the work of each load due to their small volume and low cost. However, the traditional mechanical refrigerator has no door opening alarm function, so that when the refrigerator door is not closed tightly, the user cannot be reminded in time, resulting in insufficient cooling temperature in the refrigerator and food deterioration.

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the object of the present invention is to provide a refrigerator with a door-opening delay alarm, which can realize the alarm function based on the detected door-opening signal and delay signal by using low-cost components.

In order to achieve the above object, an embodiment of the present invention proposes a refrigerator with a door opening delay alarm, comprising: a box body; a revolving door body, the revolving door body is installed on the box body through a door hinge; The detection module is used to detect the open state of the revolving door body through the state of the first switch in the detection module and output the first open signal; the detection delay module, the first switch of the detection module and the detection delay The second switches of the time module are separated by a predetermined distance along a direction perpendicular to the door hinge, and the distance between the first switch and the door hinge is greater than the distance between the second switch and the door hinge, the The detection delay module is used to detect the opening state of the revolving door body through the state of the second switch, and output a second opening signal after detecting that the revolving door body is in the open state and delaying the preset time; alarm and a control module, the control module is connected to the detection module and the detection delay module, and the control module is used to detect the first opening signal output by the detection module and the output of the detection delay module The alarm is activated after the second turn-on signal.

The refrigerator with door opening delay alarm according to the embodiment of the present invention uses the charge and discharge of the electrolytic capacitor to realize the delay function, realizes the alarm function of the refrigerator door not being closed for a long time with a simple circuit, and has the advantages of simple design and relatively low cost. low pros.

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

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a structural block diagram of a refrigerator with a door opening delay alarm according to an embodiment of the present invention;

2 is a schematic diagram of a refrigerator with a door opening delay alarm according to an embodiment of the present invention; and

Fig. 3 is a circuit diagram of a refrigerator with a door opening delay alarm according to an embodiment of the present invention.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or element must have a particular orientation, be constructed, and operate in a particular orientation should therefore not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance.

In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be mechanical connection or electrical connection, or two The internal communication of each element may be directly connected or indirectly connected through an intermediary. Those skilled in the art can understand the specific meanings of the above terms according to specific situations.

A refrigerator 100 with a door opening delay alarm according to an embodiment of the present invention will be described below with reference to FIG. 1 and FIG. 2 .

As shown in Fig. 1 and Fig. 2, the refrigerator 100 with the door opening delay alarm provided by the embodiment of the present invention includes: a box body 50, a revolving door body 60, a detection module 10, a detection delay module 20, a control module 30 and Alarm 40. Wherein, revolving door body 60 is installed on box body 50 by door hinge, has first switch K1 in detection module 10, has second switch K2 in detection delay module 20; Detection module 10 detects rotation by the state of first switch K1 The opening state of the door body 60, when detecting that the revolving door body 60 is in the open state, the detection module 10 outputs the first opening signal; the detection delay module 20 detects the opening state of the revolving door body 60 by the state of the second switch K2, when When it is detected that the revolving door body 60 is in the open state, the detection delay module 20 outputs the second opening signal after delaying the preset time; the control module 30 is connected with the detection module 10 and the detection delay module 20 respectively, for detecting After the first start signal output by the detection module 10 and the second start signal output by the detection delay module 20, the alarm device 40 is activated to perform the alarm function.

As shown in FIG. 2 , the revolving door body 60 is connected to the box body 50 through a door hinge 70 . The direction of the line between the first switch K1 and the second switch K2 is along the direction perpendicular to the door hinge 70, the first switch K1 and the second switch K2 are separated by a predetermined distance from each other, and the distance between the first switch K1 and the door hinge 70 is greater than The distance between the second switch K2 and the door hinge 70 .

As shown in FIG. 3 , the detection module 10 includes a first AC input point A, a second AC input point B, a first switch K1 and a rectification and step-down sub-module. One end of the first switch K1 is connected to the first AC input point A, and the first switch K1 is turned on when the revolving door body 60 is opened, and the first switch K1 is turned off when the revolving door body 60 is closed. The first input end of the rectification and step-down sub-module is connected to the other end of the first switch K1, the second input end of the rectification and step-down sub-module is connected to the second AC input point B, and the rectification and step-down sub-module is used for input The AC voltage is rectified and stepped down by resistance-capacitance to form a DC voltage, and the detection delay module 20, the control module 30 and the alarm 40 are powered by the DC voltage, and the DC voltage is used as the first start signal.

In one embodiment of the present invention, a 220V/50Hz power frequency strong electric signal can be input between the first AC input point A and the second AC input point B, and is converted into 5V after the rectification and step-down sub-module DC weak current signal VCC is for other modules to work.

In one embodiment of the present invention, according to the common sense of electrical safety, the switch should be connected to the neutral line, so it is preferable that point A of the first AC input end is the input end of the neutral line, and point B of the second AC input end is the input end of the live line .

In one embodiment of the present invention, the rectification and step-down sub-module adopts the technology of the common resistive-capacitance rectification and step-down circuit in the field to achieve the purpose of rectification and step-down, including bleeder resistor R1, step-down capacitor C1, bridge rectifier diode , are respectively the first diode D1 to the fourth diode D4, the Zener diode (ZD), the filter capacitor C2 and the filter resistor R2. It should be pointed out that the resistance-capacitance rectification and step-down circuit is only for the purpose of illustration, rather than limiting the protection scope of the present invention.

The detection delay module 20 includes a second switch K2, a capacitor C3 and a driving sub-module. One end of the second switch K2 is connected to the rectifying and step-down sub-module, and when the revolving door 60 is opened, the second switch K2 is disconnected, and when the revolving door 60 is closed, the magnetic door seal on the refrigerator is used to conduct the second switch K2 . One end of the capacitor C3 is connected to the other end of the second switch K2, and the other end of the capacitor C3 is grounded. The capacitor C3 is charged according to the DC voltage output by the rectification and step-down sub-module when the second switch K2 is closed. When the second switch is turned off, the capacitor C3 ends charging and starts discharging. During the discharge process, the transistor Q1 and the transistor Q2 in the driving sub-module are turned on, and the voltage between the two ends of the capacitor C3 gradually decreases. When the voltage across the capacitor C3 is below the conduction voltage of the transistor, the transistor Q1 and the transistor Q2 are turned off. , the VCC outputs a high-level second turn-on signal to the control module 30 through the resistor R4.

In one embodiment of the present invention, the second switch K2 is a reed switch. The reed switch is a magnetic sensitive switch. Compared with the general mechanical switch, the reed switch has simpler structure, smaller volume, higher speed and longer working life; Reliability is high.

In one embodiment of the present invention, the capacitor C3 is an electrolytic capacitor. Compared with other capacitors, electrolytic capacitors have the characteristics of large capacitance per unit volume, and the rated capacity can be made larger, and it has the advantage of being cheap and easy to obtain.

In one embodiment of the present invention, the preset time of the detection delay module is adjusted by adjusting the capacitance value of the capacitor C3. Specifically, the larger the capacitance of the capacitor C3 is, the longer the preset time is.

After receiving the first start signal from the detection module 10 and the second start signal from the detection delay module 20 , the control module 30 outputs a high level signal to drive the alarms in the alarms 40 .

In one embodiment of the present invention, the control module 30 further includes an AND judgment sub-module, and the judgment sub-module is used to set The above two enable signals are ANDed. When both the first start signal and the second start signal are at high level, the alarm device 40 gives an alarm.

In one embodiment of the present invention, two discrete components, the fifth diode D5 and the sixth diode D6, are used to implement logic "AND". It should be noted that this manner is only for the purpose of illustration, rather than limiting the protection scope of the present invention.

The alarm 40 includes an alarm element 41 and an alarm driving circuit. When the control module 30 inputs a high-level signal to the alarm 40, the alarm driving circuit drives the alarm element 41 to alarm to remind the user. Specifically, when the control module 30 inputs a high-level signal to the alarm 40, it means that the opening time of the revolving door body 60 exceeds the preset time, and an alarm signal needs to be sent to remind the user. Wherein, the warning element 41 may be a buzzer and/or a warning light. For example, when the alarm element 41 is a buzzer, it can alert the user by sending out a sound signal for a certain length of time or a sound signal with a predetermined frequency. When the warning element 41 is a warning light, it reminds the user by emitting a flashing light signal at a predetermined frequency.

In an example of the present invention, the alarm 40 is installed on a side close to the door hinge 70 , and the first switch K1 is installed on a side away from the door hinge 70 . Therefore, when the user opens and closes the door, there will be a certain time difference between the actions of the first switch K1 and the second switch K2. The detection delay module 20 uses the time difference to charge the electrolytic capacitor C3.

The working state of the refrigerator with door opening delay alarm proposed by the present invention will be described below in conjunction with FIG. 1 to FIG. 3 .

First of all, it should be pointed out that, as mentioned above, the distance between the first switch K1 and the door hinge 70 is greater than the distance between the second switch K2 and the door hinge 70, so the moment the revolving door 60 of the refrigerator is opened or closed, There is a certain time difference between the action of the first switch K1 and the action of the second switch K2.

When the revolving door body 60 is opened, the first switch K1 is turned on, the detection module 10 , the detection delay module 20 , the control module 30 and the alarm 40 are powered on, and the detection delay module 20 starts timing. The rectification and step-down sub-module in the detection module 10 converts the power-frequency AC power into a DC weak current VCC output, and inputs a high-level first turn-on signal to the control module 30 . At this time, the second switch K2 initially maintains a closed state for a short time, and then turns off. During the period when the second switch K2 remains closed, the capacitor C3 is rapidly charged, and at the same time, the transistor Q1 and the transistor Q2 are turned on, and the second detection module 20 outputs a low level to the control module 30 . After the second switch K2 is turned off, the capacitor C3 starts to discharge. After the capacitor C3 is fully discharged, if the revolving door body 70 is not closed at this time, the second switch K2 is still turned off, and the detection delay module 20 inputs a high-level second open signal. When the control module 30 receives both the first opening signal and the second opening signal are high-level signals, it inputs a high-level signal to the alarm 40 to drive the alarm element 41 to alarm.

In an embodiment of the present invention, the detection module 10 , the detection delay module 20 , the control module 30 and the alarm 40 may be integrated on a PCB (Printed Circuit Board, printed circuit board). The PCB board can be installed in the installation groove reserved on the top of the box body 50 . Moreover, the PCB board can be directly connected in series in the main circuit of the first switch K1, so that the first switch K1 controls the on and off of the integrated functions of the PCB board.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the invention is defined by the claims and their equivalents.

Claims (8)

1. a refrigerator is characterized in that, comprising:

Casing;

The revolving door body, said revolving door body is installed on the said casing through hinge;

Detection module is used for the opening of the said revolving door body of state-detection through said detection module first switch and exports first start signal;

Detect time delay module; The edge is perpendicular to the direction interval preset distance of said hinge between first switch of said detection module and the second switch of said detection time delay module; And the distance of the said hinge of said first switch distance is greater than the distance of the said hinge of said second switch distance; Said detection time delay module is used for the opening through the said revolving door body of the state-detection of said second switch, and detect that said revolving door body is in opening and the Preset Time of delaying time after export second start signal;

Alarm; And

Control module; Said control module all links to each other with the detection time delay module with said detection module, and said control module is used for after second start signal of first start signal that detects said detection module output and the output of said detection time delay module, starting said alarm.

2. refrigerator as claimed in claim 1 is characterized in that, said detection module further comprises:

First ac input end and second ac input end;

One end of said first switch links to each other with said first ac input end; And

Rectification step-down submodule; The first input end of said rectification step-down submodule links to each other with the other end of said first switch; Second input of said rectification step-down submodule links to each other with said second ac input end, is used for alternating voltage to input and carries out the rectification step-down forming DC voltage, and be said detection time delay module, said alarm and control module power supply through said DC voltage; Wherein, said DC voltage is said first start signal.

3. refrigerator as claimed in claim 2 is characterized in that, said detection time delay module further comprises:

Said second switch, an end of said second switch links to each other with said rectification step-down module;

Electric capacity, an end of said electric capacity links to each other with the other end of said second switch, the other end ground connection of said electric capacity, the DC voltage that said electric capacity is used for when said second switch is closed, exporting according to said rectification step-down module charges;

The driven element module, said driven element module links to each other with said electric capacity, is used for when said electric capacity charging voltage reaches preset value, exporting said second start signal.

4. refrigerator as claimed in claim 3 is characterized in that, said second switch is a tongue tube.

5. refrigerator as claimed in claim 3 is characterized in that, said electric capacity is electrochemical capacitor.

6. refrigerator as claimed in claim 5 is characterized in that, adjusts the said Preset Time of said detection time delay module through the capacitance of adjusting said electrochemical capacitor.

7. refrigerator as claimed in claim 3 is characterized in that, said control module further comprises:

With the judgement submodule, be used for after receiving said first start signal and second start signal, exporting high level signal to drive said alarm.

8. refrigerator as claimed in claim 7 is characterized in that, said alarm is buzzer and/or alarm lamp.

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