Control method of refrigerator, control circuit of refrigerator, and refrigerator

Abstract

The application provides a refrigerator control method, a control circuit and a refrigerator. The method comprises the following steps: acquiring a level signal output by a detection module in real time; if the level signal is switched to a high level signal, a timing module is controlled to start timing; if the duration of the high level signal exceeds a first preset time, a power input end is controlled to stop inputting a power signal, so that an illuminating lamp is turned off; after the power input end stops inputting the power signal, the power input end is controlled to input the power signal again after a second preset time, so that the light-sensitive switch module can control the on-off of the illuminating lamp and the power input end according to the light intensity in the cabinet; if the door body is currently closed, the light-sensitive switch module is turned off, and at this time, the illuminating lamp remains in an off state; if the door body is currently opened, the light-sensitive switch module is turned on, and the illuminating lamp is turned on again, so that the refrigerator door opening and closing detection and the control of the illuminating lamp on-off are realized, and a mechanical door switch is not needed to be set, and the method is simple and easy to implement.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of household appliances, and more particularly to a control method and control circuit of a refrigerator and the refrigerator. BACKGROUND

[0002] At present, the lighting of the refrigeration chamber of a refrigerator is usually controlled by a mechanical door switch, such as a cylindrical switch. The cylindrical switch is generally installed on a hinge connecting the door body and the cabinet. When the door body is closed, the cylindrical structure on the switch is compressed and the internal circuit is disconnected, so that the lighting is turned off. When the door body is opened, the compressed cylindrical structure rebounds and the power supply circuit is turned on, so that the lighting is turned on. However, when the door body is not closed tightly, the mechanical door switch cannot detect that the door body is in an open state, and the lighting is turned off. Therefore, the mechanical door switch cannot accurately control the lighting of the refrigerator. SUMMARY

[0003] The embodiments of the present application provide a control method and control circuit of a refrigerator and the refrigerator, which do not need to set a mechanical door switch and can accurately control the lighting of the refrigerator.

[0004] The embodiments of the present application provide a control method of a refrigerator, the refrigerator comprising a door body and a cabinet, the cabinet being provided with a lighting, and the refrigerator further comprising a control circuit, the control circuit comprising a photosensitive switch module, a detection module and a timing module, the photosensitive switch module being configured to control the on-off of the lighting and a power input end according to the light intensity in the cabinet; the control method comprising:

[0005] real-time acquisition of a level signal output by the detection module, the detection module being configured to output different level signals according to the on-off of the photosensitive switch module;

[0006] if the level signal is switched to a high level signal, the timing module is controlled to start timing;

[0007] if the duration of the high level signal exceeds a first preset time, the power input end is controlled to stop inputting a power signal, so that the lighting is turned off;

[0008] after the power input end stops inputting the power signal, the power input end is controlled to input the power signal again after a second preset time, so that the photosensitive switch module can control the on-off of the lighting and the power input end according to the light intensity in the cabinet, and the second preset time is less than the first preset time.

[0009] In some embodiments, after the power input end inputs the power signal again, the method further comprises:

[0010] If the acquired level signal is a high level signal, the control module controls the timing module to restart timing.

[0011] If the duration of the high level signal exceeds a third preset time, the control module controls the power input end to stop inputting the power signal again, so that the illumination lamp is turned off, the third preset time being greater than the first preset time.

[0012] In some embodiments, after the control module controls the power input end to input the power signal again, the control module further controls the timing module to restart timing.

[0013] If the acquired level signal is a high level signal, the control module controls the timing module to restart timing.

[0014] The detection module detects whether an object in the cabinet moves.

[0015] If not, when the duration of the high level signal exceeds a fourth preset time, the control module controls the power input end to stop inputting the power signal, so that the illumination lamp is turned off.

[0016] If yes, after a fifth preset time, the control module controls the power input end to stop inputting the power signal, so that the illumination lamp is turned off, the fifth preset time being greater than the fourth preset time.

[0017] In some embodiments, after the control module controls the power input end to input the power signal again, the control module further controls the timing module to restart timing.

[0018] If the acquired level signal is a low level signal, the control module determines that the door body is closed and the illumination lamp is turned off.

[0019] Embodiments of the application also provide a control circuit applied to a refrigerator, the refrigerator comprising a door body and a cabinet, the cabinet being provided with an illumination lamp, and the control circuit comprising:

[0020] a power input end inputting a power signal;

[0021] a photosensitive switch module for controlling the on-off of the illumination lamp and the power input end according to the light intensity in the cabinet;

[0022] a detection module for outputting different level signals according to the on-off of the photosensitive switch module;

[0023] a timing module for timing;

[0024] a control module electrically connected with the power input end, the detection module and the timing module, the control module being configured to:

[0025] acquire the level signal output by the detection module in real time;

[0026] If the level signal is switched to a high level signal, the timing module is controlled to start timing.

[0027] If the duration of the high level signal exceeds a first preset time, the power input end is controlled to stop inputting the power signal, so that the illumination lamp is turned off.

[0028] After the power input end stops inputting the power signal for a second preset time, the power input end is controlled to input the power signal again, so that the photosensitive switch module can control the on-off of the illumination lamp and the power input end according to the light intensity in the box body, and the second preset time is less than the first preset time.

[0029] In some embodiments, the photosensitive switch module includes a photosensitive triode, a first resistor, a second resistor, and a switch tube, the collector of the photosensitive triode is connected to the control end of the switch tube through the first resistor, the emitter of the photosensitive triode is grounded, one end of the second resistor is connected to the power input end, the other end of the second resistor is connected between the first resistor and the control end of the switch tube, the input end of the switch tube is connected to the power input end, and the output end of the switch tube is connected to the illumination lamp and the detection module.

[0030] In some embodiments, the detection module includes a third resistor and a fourth resistor, one end of the third resistor is connected to the output end of the switch tube, the other end of the third resistor is connected to the fourth resistor, the other end of the fourth resistor is grounded, and the control module includes a first control interface connected between the third resistor and the fourth resistor.

[0031] In some embodiments, the detection module further includes a filter capacitor, which is connected in parallel with the fourth resistor.

[0032] In some embodiments, the control circuit further includes a current limiting module, the input end of the current limiting module is connected between the photosensitive switch module and the detection module, the output end of the current limiting module is connected to the illumination lamp, and the current limiting module is used to divide the voltage of the power input end and limit the current to provide a rated voltage to the illumination lamp.

[0033] Embodiments of the present application also provide a refrigerator, which includes a door body and a box body, the box body is provided with an illumination lamp, and the refrigerator further includes a control circuit, which is the control circuit of any of the above embodiments.

[0034] The control method of the refrigerator provided by the embodiment of the application comprises the following steps: acquiring a level signal output by a detection module in real time; if the level signal is switched to a high level signal, starting timing of a timing module; if a duration of the high level signal exceeds a first preset time, stopping input of a power supply signal to a power supply input end, so that the illuminating lamp is turned off; after the power supply input end VCC stops input of the power supply signal, re-inputting the power supply signal to the power supply input end after a second preset time, so that the photosensitive switch module can control on-off of the illuminating lamp and the power supply input end according to light intensity in the cabinet; if the door body is currently closed and there is no light in the cabinet, the photosensitive switch module is disconnected, and at this time, the illuminating lamp remains turned off; if the door body is currently opened and external light enters, the photosensitive switch module is connected, and at this time, the illuminating lamp is re-lit, so that the refrigerator door opening and closing detection and the control of the illuminating lamp on-off are realized, and a mechanical door switch does not need to be arranged, and the method is simple and easy to implement. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0036] In order to more completely understand the application and its beneficial effects, the following will be combined with the drawings to explain the following, wherein the same reference numerals in the following description represent the same parts.

[0037] Figure 1 The structural block diagram of the control circuit provided by the embodiment of the application.

[0038] Figure 2 The circuit principle diagram of the control circuit provided by the embodiment of the application.

[0039] Figure 3 The first flowchart of the control method of the refrigerator provided by the embodiment of the application.

[0040] Figure 4 The second flowchart of the control method of the refrigerator provided by the embodiment of the application.

[0041] Figure 5 The third flowchart of the control method of the refrigerator provided by the embodiment of the application.

[0042] Figure 6 The structural diagram of the refrigerator provided by the embodiment of the application. DETAILED DESCRIPTION

[0043] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort are within the protection scope of the present application.

[0044] The embodiments of the present application provide a control method and a control circuit of a refrigerator and the refrigerator. The mechanical door switch is not needed to be arranged, and the refrigerator door opening detection and the accurate control of the illuminating lamp can be realized. The present application will be further described in combination with the accompanying drawings and embodiments.

[0045] The refrigerator can be a single-door refrigerator, a double-door refrigerator or a side-by-side refrigerator. The refrigerator comprises a door body and a cabinet. The cabinet is internally defined with a plurality of storage compartments. The storage compartments are divided into a plurality of storage areas by partitions and shelves. The door body is pivotally connected to the front of the cabinet. The cabinet is internally provided with an illuminating lamp. During use of the refrigerator, when the door body is opened, the illuminating lamp is lighted to facilitate the user to take food from the storage compartments of the cabinet. When the door body is closed, the illuminating lamp is extinguished to save electric energy.

[0046] Please refer to Figure 1 and Figure 2 , Figure 1 The structural block diagram of the control circuit provided by the embodiments of the present application, Figure 2 The circuit principle diagram of the control circuit provided by the embodiments of the present application. The control circuit 100 provided by the embodiments of the present application is applied to a refrigerator. The control circuit 100 can be arranged on the control panel of the refrigerator. The control circuit 100 comprises a power input terminal VCC, a photosensitive switch module 10, a detection module 20, a timing module 30 and a control module 40.

[0047] The power input terminal VCC is used for inputting a power signal, the photosensitive switch module 10 is connected between the power input terminal VCC and the illuminating lamp 50, and is used for controlling the on-off of the illuminating lamp 50 and the power input terminal VCC according to the light intensity in the box; the detection module 20 is connected with the photosensitive switch module 10, and is used for outputting a level signal according to the on-off of the photosensitive switch module 10; the timing module 30 is used for timing; the control module 40 is electrically connected with the power input terminal VCC and the detection module 20, and is used for acquiring the level signal output by the detection module 20 in real time; if the level signal is switched to a high level signal, the timing module 30 is controlled to start timing; if the duration of the high level signal exceeds a first preset time, the power input terminal VCC is controlled to stop inputting the power signal, so that the illuminating lamp 50 is turned off; after the power input terminal VCC stops inputting the power signal for a second preset time, the power input terminal VCC is controlled to input the power signal again, so that the photosensitive switch module 10 can control the on-off of the illuminating lamp 50 and the power input terminal VCC according to the light intensity in the box; if the door body is currently closed and there is no light in the box, the photosensitive switch module 10 is disconnected, and at this time, the illuminating lamp 50 remains in an off state; if the door body is currently opened and light enters the box, the photosensitive switch module 10 is turned on, and at this time, the illuminating lamp 50 is turned on again, so that the detection of the opening and closing of the refrigerator door and the control of the illuminating lamp 50 are realized, and a mechanical door switch does not need to be set, and the implementation is simple.

[0048] In the embodiment, the photosensitive switch module 10 can control the on-off of the illuminating lamp 50 and the power input terminal VCC according to the light intensity in the box, that is, when the photosensitive switch module 10 is turned on, the power input terminal VCC inputs the power signal to the illuminating lamp 50, the illuminating lamp 50 is turned on, and the detection module 20 outputs the high level signal to the control module 40; when the photosensitive switch is disconnected, the illuminating lamp 50 is turned off due to no input of the power signal, and the detection module 20 outputs the low level signal (0V) to the control module 40.

[0049] It can be understood that when the door body of the refrigerator is opened, the photosensitive switch module 10 is irradiated by external light and turns on, at this time the power input end VCC can input a power signal to the illuminating lamp 50, the illuminating lamp 50 is lit, and the detection module 20 outputs a high level signal to the control module 40; because the light emitted by the illuminating lamp 50 makes the photosensitive switch module 10 continuously turn on, the illuminating lamp 50 always remains in a lit state, and the detection module 20 continuously outputs a high level signal to the control module 40, when the duration of the high level signal exceeds the first preset time, the control module 40 can control the power input end VCC to stop inputting the power signal, so that the illuminating lamp 50 is extinguished, after an interval of the second preset time, the power input end VCC re-inputs the power signal, if the door body is currently closed, the photosensitive switch module 10 is in an open state, at this time the illuminating lamp 50 remains in an extinguished state, if the door body is currently opened, the photosensitive switch module 10 is turned on, at this time the illuminating lamp 50 is re-lit, so as to realize the detection of the opening and closing of the door of the refrigerator and the control of the lighting and extinguishing of the illuminating lamp 50, and a mechanical door switch does not need to be set, which is simple and easy to realize.

[0050] The second preset time is less than the first preset time, for example, the first preset time can be set to 1 minute, and the second preset time can be set to 1 second, the first preset time and the second preset time can also be other lengths, which are set according to actual needs.

[0051] In the embodiment of the application, after the power input end VCC stops inputting the power signal for an interval of the second preset time, and the power input end VCC re-inputs the power signal, if the level signal acquired by the control module 40 is a low level signal, it is determined that the door body has been closed, and the illuminating lamp 50 is in an extinguished state; if the level signal acquired by the control module 40 is a high level signal, the timing module re-starts timing, and when the duration of the high level signal exceeds a third preset time, the power input end VCC is controlled to stop inputting the power signal again, so that the illuminating lamp is extinguished, wherein the third preset time is greater than the first preset time.

[0052] It should be noted that after the power input end VCC re-inputs the power signal, if the acquired level signal is a high level signal, the duration of the high level signal can be extended to avoid the flickering problem of the illuminating lamp 50 in the repeated process of turning off the power input end VCC.

[0053] Please continue to refer to Figure 2The photosensitive switch module 10 comprises a photosensitive transistor Q1, a first resistor R1, a second resistor R2 and a switch tube Q2. The collector of the photosensitive transistor Q1 is connected to the control end of the switch tube Q2 through the first resistor R1, the emitter of the photosensitive transistor Q1 is grounded, one end of the second resistor R2 is connected to the power input terminal VCC, the other end of the second resistor R2 is connected between the first resistor R1 and the control end of the switch tube Q2, the input end of the switch tube Q2 is connected to the power input terminal VCC, and the output end of the switch tube Q2 is connected to the illuminating lamp 50 and the detection module 20.

[0054] When the door body is in the closed state, the photosensitive transistor Q1 is turned off due to the absence of light in the cabinet, the control end of the switch tube Q2 is clamped at a high level through the second resistor R2, so that the switch tube Q2 is in an off state, and the illuminating lamp 50 is in an off state. When the door body is opened, external light enters, the photosensitive transistor Q1 is turned on, and at the same time the control end of the switch tube Q2 is pulled down to a low level, so that the switch tube Q2 is turned on. At this time, the power input terminal VCC can input a power signal to the illuminating lamp 50, and the illuminating lamp 50 is lit.

[0055] The switch tube Q2 can be a triode or a field effect tube. In this embodiment, the switch tube Q2 is a PMOS tube, the gate of the PMOS tube is connected to the power supply voltage through the second resistor R2, and the source of the PMOS tube is connected to the power supply voltage. The drain of the PMOS tube is connected to the illuminating lamp 50 and the detection module 20.

[0056] Please continue to refer to Figure 2 The detection module 20 comprises a third resistor R3 and a fourth resistor R4, one end of the third resistor R3 is connected to the output end of the switch tube Q2, the other end of the third resistor R3 is connected to the fourth resistor R4, the other end of the fourth resistor R4 is grounded, and the control module 40 comprises a first control interface connected between the third resistor R3 and the fourth resistor R4. The control module 40 further comprises a second control interface and a third control interface, the second control interface is connected to the power input terminal VCC and is used to control the power input terminal VCC to stop inputting a power signal or to re-input a power signal, and the third control interface is used to be grounded.

[0057] It can be understood that when the switch tube Q2 is turned on, the power input terminal VCC can not only provide a power voltage to the illuminating lamp 50, but also the voltage output by the power input terminal VCC can flow to the ground terminal through the third resistor R3 and the fourth resistor R4, at this time, the control module 40 collects the voltage signal of the node between the third resistor R3 and the fourth resistor R4 as a high level. When the switch tube Q2 is turned off, the illuminating lamp 50 and the detection module 20 have no voltage signal input, at this time, the illuminating lamp 50 is extinguished, and the detection module 20 collects the voltage signal of the node between the third resistor R3 and the fourth resistor R4 as a low level, i.e. 0V.

[0058] The detection module 20 further comprises a filter capacitor C1, which is connected in parallel with the fourth resistor R4. The filter capacitor C1 can filter out interference signals to prevent other interference signals from affecting the control module 40.

[0059] Please continue to refer to Figure 1 and Figure 2 In the embodiment of the application, the control circuit 100 further comprises a current limiting module 60, the input end of the current limiting module 60 is connected between the photosensitive switch module 10 and the detection module 20, and the output end of the current limiting module 60 is connected with the illuminating lamp 50. The current limiting module 60 is used for voltage division and current limiting of the voltage of the power input terminal VCC to provide a rated voltage to the illuminating lamp 50.

[0060] Specifically, the current limiting module 60 comprises a fifth resistor R5 and a sixth resistor R6 connected in parallel, one end of the fifth resistor R5 and the sixth resistor R6 is connected between the output end of the switch tube Q2 and the third resistor R3, and the other end of the fifth resistor R5 and the sixth resistor R6 is connected with the illuminating lamp 50. When the switch tube Q2 is turned on, the voltage output by the power input terminal VCC is divided and limited by the fifth resistor R5 and the sixth resistor R6 to provide a rated voltage to the illuminating lamp 50 to prevent the illuminating lamp 50 from being damaged due to voltage fluctuation.

[0061] The illuminating lamp 50 comprises a plurality of light emitting diodes, the plurality of light emitting diodes are connected in series, one end of the plurality of light emitting diodes is connected with the fifth resistor R5 and the sixth resistor R6, and the other end of the plurality of light emitting diodes is grounded to form a loop.

[0062] The working principle of the control circuit 100 provided in the embodiment of the application will be described below in combination with Figure 1 and Figure 2

[0063] ​If the door body is in the closed state, the photosensitive triode Q1 is off, the control end of the switch tube Q2 is clamped at a high level through the second resistor R2, so that the switch tube Q2 is in the off state, and the illuminating lamp 50 is in the off state; when the door body is opened, the photosensitive triode Q1 is turned on under the influence of external light, and at the same time the control end of the switch tube Q2 is pulled down to a low level, so that the switch tube Q2 is turned on, at this time the illuminating lamp 50 is lit, and the detection module 20 outputs a high level signal to the control module 40; because the light emitted by the illuminating lamp 50 makes the photosensitive switch module 10 continuously conduct, the illuminating lamp 50 always keeps on, and the detection module 20 continuously outputs a high level signal to the control module 40, when the duration of the high level signal exceeds the first preset time, the control module 40 can control the power input end VCC to stop inputting the power signal, so that the illuminating lamp 50 is turned off. After the voltage input end VCC stops inputting the power signal for a second preset time, the control power input end VCC re-inputs the power signal, if the door body is currently closed, the photosensitive switch module 10 is in the off state, at this time the illuminating lamp 50 remains off, if the door body is currently opened, the photosensitive switch module 10 is turned on, at this time the illuminating lamp 50 is re-lit, so as to realize the detection of the opening and closing of the refrigerator door and the control of the illuminating lamp 50.

[0064] The embodiment of the present application also provides a control method of a refrigerator, the refrigerator comprising a door body and a cabinet, the cabinet being provided with an illuminating lamp 50, the refrigerator further comprising a control circuit 100, the control circuit 100 comprising a photosensitive switch module 10, a detection module 20 and a timing module 30, the photosensitive switch module 10 being connected between a power input end VCC and the illuminating lamp 50, and being used for controlling the on-off of the illuminating lamp 50 and the power input end VCC according to the light intensity in the cabinet; the detection module 20 being connected with the photosensitive switch module 10, and being used for outputting different level signals according to the on-off of the photosensitive switch module 10; the timing module 30 being connected with the detection module 20, and being used for timing. The control method is executed by, for example, a main control chip on the control panel of the refrigerator.

[0065] For example, please refer to Figure 1 and Figure 2 and refer to Figure 3 , Figure 3 The first flowchart of the control method of the refrigerator provided by the embodiment of the present application is shown. The control method comprises the following steps:

[0066] 101, real-time acquisition of the level signal output by the detection module.

[0067] In the embodiment of the present application, the photosensitive switch module 10 can control the on-off of the illuminating lamp 50 and the power input terminal VCC according to the light intensity in the box. When the photosensitive switch module 10 is turned on, the power input terminal VCC inputs the power signal to the illuminating lamp 50, the illuminating lamp 50 is lighted, and the detection module 20 outputs the high level signal to the control module 40. When the photosensitive switch is turned off, the illuminating lamp 50 is extinguished due to no input of the power signal, and the detection module 20 outputs the low level signal (0V) to the control module 40.

[0068] 102, if the level signal is switched to the high level signal, the control timing module starts timing.

[0069] It can be understood that when the door body of the refrigerator is opened, the photosensitive switch module 10 is turned on by the external light, at this time the power input terminal VCC can input the power signal to the illuminating lamp 50, the illuminating lamp 50 is lighted, and the detection module 20 outputs the high level signal to the control module 40, and the timing module 30 detects the change of the level signal and starts timing.

[0070] 103, if the duration of the high level signal exceeds the first preset time, the control power input terminal stops inputting the power signal, so that the illuminating lamp 50 is extinguished.

[0071] 104, after the power input terminal stops inputting the power signal for a second preset time, the control power input terminal re-inputs the power signal, so that the photosensitive switch module can control the on-off of the illuminating lamp and the power input terminal according to the light intensity in the box, and the second preset time is less than the first preset time.

[0072] It should be noted that the light emitted by the illuminating lamp 50 makes the photosensitive switch module 10 continuously turned on, the illuminating lamp 50 always keeps the lighted state, and the detection module 20 continuously outputs the high level signal to the control module 40. If the duration of the high level signal exceeds the first preset time, the control module 40 can control the power input terminal VCC to stop inputting the power signal, so that the illuminating lamp 50 is extinguished. After the power input terminal VCC stops inputting the power signal for a second preset time, the control module 40 controls the power input terminal VCC to re-input the power signal. If the door body is currently closed, the photosensitive switch module 10 is in the off state, at this time the illuminating lamp 50 still keeps the extinguished state. If the door body is currently opened, the photosensitive switch module 10 is turned on, the illuminating lamp 50 is re-lighted, so as to realize the detection of the opening and closing of the refrigerator door and the control of the light and extinction of the illuminating lamp 50, and a mechanical door switch is not needed to be set, which is simple and easy to realize.

[0073] Further, please refer to Figure 4 , Figure 4 The second flow diagram of the control method of the refrigerator provided in the embodiment of the present application. The control method comprises the following steps:

[0074] 201, acquiring the level signal outputted by the detection module in real time.

[0075] 202, if the level signal is switched to the high level signal, controlling the timer to start timing.

[0076] 203, if the duration of the high level signal exceeds the first preset time, controlling the power input end to stop inputting the power signal, so that the illuminating lamp is turned off.

[0077] 204, after the power input end stops inputting the power signal for the second preset time, controlling the power input end to input the power signal again, so that the photosensitive switch module can control the on-off of the illuminating lamp and the power input end according to the light intensity in the box, and the second preset time is less than the first preset time.

[0078] Steps 201 to 204 can refer to steps 101 to 104 described above, and will not be described here.

[0079] 205, if the acquired level signal is a high level signal, controlling the timing module to start timing again.

[0080] 206, when the duration of the high level signal exceeds the third preset time, controlling the power input end to stop inputting the power signal again, so that the illuminating lamp is turned off, and the third preset time is greater than the first preset time.

[0081] It can be understood that after the power input end stops inputting the power signal for the second preset time, the control module 40 controls the power input end VCC to input the power signal again, if the door body is currently closed, the photosensitive switch module 10 is in an open state, at this time the illuminating lamp 50 still maintains the extinguished state, and the detection module 20 outputs a low level signal to the control module 40, if the door body is currently opened, the photosensitive switch module 10 is turned on, at this time the illuminating lamp 50 is re-lit, and the detection module 20 outputs a high level signal to the control module 40.

[0082] Wherein, after the power input end VCC inputs the power signal again, if the acquired level signal is a high level signal, the timing module 30 starts timing again, when the duration of the high level signal exceeds the third preset time, the power input end VCC stops inputting the power signal again, so that the illuminating lamp 50 is turned off, and the third preset time is greater than the first preset time. It should be noted that after the power input end VCC inputs the power signal again, if the acquired level signal is a high level signal, the duration of the high level signal can be extended to avoid the flickering problem of the illuminating lamp 50 in the repeated process of turning off the power input end VCC.

[0083] For example, the third preset time can be set to 10 minutes.

[0084] In some other embodiments, an alarm can be arranged in the refrigerator, and the alarm is connected with the timing module. If the timing of the timing module exceeds the third preset time, it can be determined that the door body of the refrigerator is not tightly closed or the user forgets to close the door, and the alarm is started to prompt the user to handle the abnormal situation of the door body, so as to avoid the problem that the door body of the refrigerator is opened for a long time, which leads to high energy consumption or reduces the freshness of food.

[0085] Further, please refer to Figure 5 , Figure 5 The third flowchart of the control method of the refrigerator provided in the embodiments of the present application is shown. The control method comprises the following steps:

[0086] 301, the level signal output by the detection module is acquired in real time.

[0087] In the embodiments of the present application, the photosensitive switch module 10 can control the on-off of the lighting lamp 50 and the power input terminal VCC according to the light intensity in the box body. When the photosensitive switch module 10 is turned on, the power input terminal VCC inputs the power signal to the lighting lamp 50, the lighting lamp 50 is lit, and the detection module 20 outputs the high level signal to the control module 40. When the photosensitive switch is turned off, the lighting lamp 50 is extinguished due to no power signal input, and the detection module 20 outputs the low level signal (0V) to the control module 40.

[0088] 302, if the level signal is switched to the high level signal, the timing module is controlled to start timing.

[0089] It can be understood that when the door body of the refrigerator is opened, the photosensitive switch module 10 is turned on under the irradiation of external light, at this time, the power input terminal VCC can input the power signal to the lighting lamp 50, the lighting lamp 50 is lit, and the detection module 20 outputs the high level signal to the control module 40, and the timing module 30 detects the level change and starts timing.

[0090] 303, if the duration of the high level signal exceeds the first preset time, the power input terminal is controlled to stop inputting the power signal, so that the lighting lamp is extinguished.

[0091] 304, after the power input terminal stops inputting the power signal for the second preset time, the power input terminal is controlled to input the power signal again.

[0092] 305, if the acquired level signal is the high level signal, the timing module is controlled to start timing again.

[0093] It should be noted that, since the light emitted by the illuminating lamp 50 makes the photosensitive switch module 10 continuously conductive, the illuminating lamp 50 always remains in the state of being turned on, and the detection module 20 continuously outputs a high-level signal to the control module 40. When the duration of the high-level signal exceeds the first preset time, the control module 40 can control the power input end VCC to stop inputting the power signal, so as to make the illuminating lamp 50 extinguished. After the power input end stops inputting the power signal for a second preset time, the control module 40 controls the power input end VCC to re-input the power signal, if the door body is currently closed, the photosensitive switch module 10 is in the state of being disconnected, the detection module 20 outputs a low-level signal, and the illuminating lamp 50 is extinguished, if the door body is currently opened, the photosensitive switch module 10 is re-conductive, the detection module 20 outputs a high-level signal, and the illuminating lamp 50 is turned on. If the control module 40 obtains the high-level signal, the control timing module 30 re-starts timing.

[0094] 306, detecting whether there is an object moving in the box.

[0095] In some embodiments, a camera or a camera head and the like capable of recording the features of an object can be arranged in the refrigerator to monitor whether there is an object moving in the box in real time. The identification device is electrically connected with the control module 40, for example, when the identification device detects that there is an object moving in the box, it indicates that the user may take or store food materials from the refrigerator, the door body is opened and the illuminating lamp 50 is turned on, and then a first signal is input to the control module 40; when the identification device detects that there is an object moving in the box, it indicates that the user is currently not operating the refrigerator, the door body is closed and the illuminating lamp 50 is extinguished, and then a second signal is input to the control module 40.

[0096] When it is detected that there is no object moving in the box currently, step 307 is executed, and when it is detected that there is an object moving in the box currently, step 308 is executed.

[0097] 307, when the duration of the high-level signal exceeds the fourth preset time, the control module 40 controls the power input end to stop inputting the power signal, so as to make the illuminating lamp 50 extinguished. 308, after delaying for a fifth preset time, the control module 40 controls the power input end to stop inputting the power signal, so as to make the illuminating lamp extinguished, and the fifth preset time is greater than the fourth preset time.

[0098] It can be understood that, when it is detected that there is no object moving in the box and the obtained level signal is a high-level signal, it may be an abnormal situation that the door body of the refrigerator is not tightly closed or the user forgets to close the door, when the duration of the high-level signal exceeds the fourth preset time, the control module 40 can control the power input end to stop inputting the power signal, so as to make the illuminating lamp 50 extinguished; at the same time, the alarm can also be automatically started to prompt the user to handle the abnormal situation of the door body, so as to avoid the problem that the door body of the refrigerator is opened for a long time, which leads to high energy consumption or reduces the freshness of food.

[0099] When it is detected that there is an object moving in the box, since the user is currently operating the refrigerator, the door body is in an open state, and the illuminating lamp is on, at this time the control module can control the power input end VCC to stop inputting the power signal after delaying a fifth preset time, wherein the fifth preset time is greater than the fourth preset time, so as to avoid the illuminating lamp 50 from flickering in the repeated process of the power input end VCC being turned off.

[0100] Please refer to Figure 6 , Figure 6 The refrigerator provided by the embodiment of the present application is shown in the structural diagram. The embodiment of the present application also provides a refrigerator 400, which can be a single-door refrigerator, a double-door refrigerator, or a side-by-side refrigerator, etc. The refrigerator 400 comprises a door body 410 and a box body 420, the inside of the box body 420 is defined as a plurality of storage compartments, the storage compartments are divided into a plurality of storage areas by partitions, shelves, etc., and the door body 410 is pivotally connected to the front part of the box body 420. Wherein, the box body 420 is provided with an illuminating lamp 50, and the refrigerator 400 further comprises a control panel 430, the control panel 430 is provided with a control circuit 100, the control circuit 100 is used for controlling the on-off of the illuminating lamp 50 and detecting the opening and closing of the door body 410, and the control circuit 100 is the control circuit 100 described in any of the above embodiments. The refrigerator 400 provided by the embodiment of the present application does not need to be provided with a mechanical door switch, and can realize the opening and closing detection of the refrigerator 400 and the accurate control of the illuminating lamp 50.

[0101] In summary, the control method, control circuit and refrigerator provided by the embodiment of the present application can realize the opening and closing detection of the refrigerator and the control of the on-off of the illuminating lamp 50, and do not need to be provided with a mechanical door switch, which is simple and easy to realize.

[0102] In the description of the present application, the terms “first” and “second” are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with “first” and “second” can explicitly or implicitly include one or more features.

[0103] The control method of the refrigerator, the control circuit of the refrigerator, and the refrigerator provided by the embodiments of the present application are described in detail above, and the principles and implementation manners of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, the specific implementation manners and application ranges will be changed according to the idea of the present application. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A method for controlling a refrigerator, the refrigerator comprising a door and a cabinet, wherein a light is provided inside the cabinet, characterized in that, The refrigerator also includes a control circuit, which comprises a photosensitive switch module, a detection module, and a timing module. The photosensitive switch module is used to control the on / off state of the lighting lamp and the power input terminal based on the light intensity inside the refrigerator. The refrigerator also includes an alarm connected to the timing module. The control method includes: The detection module acquires the level signal output by the detection module in real time, and the detection module is used to output different level signals according to the on / off state of the photosensitive switch module; If the level signal switches to a high level signal, the timing module is controlled to start timing; If the duration of the high-level signal exceeds a first preset time, the power input terminal is controlled to stop inputting power signals so that the lighting lamp is turned off. After the power input terminal stops inputting a power signal, a second preset time interval is elapsed, and the power input terminal is controlled to re-input a power signal, so that the photosensitive switch module can control the on / off state of the lighting lamp and the power input terminal according to the light intensity inside the box. The second preset time is less than the first preset time. If the acquired level signal is a high level signal, then control the timing module to restart timing; When the duration of the high-level signal exceeds a third preset time, the alarm is activated to prompt the user to handle the abnormal situation of the door. The third preset time is greater than the first preset time. Detect whether there is any movement inside the box; If not, when the duration of the high-level signal exceeds the fourth preset time, the power input terminal is controlled to stop inputting power signals so that the lighting is turned off; and the alarm is automatically activated to prompt the user to handle the abnormal situation of the door.

2. The refrigerator control method according to claim 1, characterized in that, After the control of the power input terminal to re-input the power signal, the method further includes: If the acquired level signal is a high level signal, then control the timing module to restart timing; If the duration of the high-level signal exceeds a third preset time, the power input terminal is controlled to stop inputting the power signal again, so that the lighting lamp is turned off. The third preset time is greater than the first preset time.

3. The refrigerator control method according to claim 1, characterized in that, After detecting whether there is any movement inside the box, the method further includes: If so, after a fifth preset time delay, the power input terminal is controlled to stop inputting power signals so that the lighting lamp is turned off. The fifth preset time is greater than the fourth preset time.

4. The refrigerator control method according to claim 1, characterized in that, After the control of the power input terminal to re-input the power signal, the method further includes: If the acquired level signal is a low level signal, it is determined that the door is closed and the lighting is off.

5. A control circuit applied to a refrigerator, the refrigerator comprising a door and a cabinet, the cabinet being equipped with a light source, characterized in that, The control circuit includes: Power input terminal, for inputting power signals; A photosensitive switch module is used to control the connection and disconnection of the lighting lamp and the power input terminal based on the light intensity inside the cabinet; The detection module is used to output different level signals according to the on / off state of the photosensitive switch module; The timing module is used for timing. An alarm is connected to the timing module; The control module is electrically connected to the power input terminal, the detection module, and the timing module. The control module is used for: The level signal output by the detection module is acquired in real time; If the level signal switches to a high level signal, the timing module is controlled to start timing; If the duration of the high-level signal exceeds a first preset time, the power input terminal is controlled to stop inputting power signals so that the lighting lamp is turned off. After the power input terminal stops inputting a power signal, a second preset time interval is elapsed, and the power input terminal is controlled to re-input a power signal, so that the photosensitive switch module can control the on / off state of the lighting lamp and the power input terminal according to the light intensity inside the box. The second preset time is less than the first preset time. If the acquired level signal is a high level signal, then control the timing module to restart timing; When the duration of the high-level signal exceeds a third preset time, the alarm is activated to prompt the user to handle the abnormal situation of the door. The third preset time is greater than the first preset time. Detect whether there is any movement inside the box; If not, when the duration of the high-level signal exceeds the fourth preset time, the power input terminal is controlled to stop inputting power signals so that the lighting is turned off; and the alarm is automatically activated to prompt the user to handle the abnormal situation of the door.

6. The control circuit according to claim 5, characterized in that, The photosensitive switch module includes a phototransistor, a first resistor, a second resistor, and a switching transistor. The collector of the phototransistor is connected to the control terminal of the switching transistor through the first resistor, and the emitter of the phototransistor is grounded. One end of the second resistor is connected to the power input terminal, and the other end of the second resistor is connected between the first resistor and the control terminal of the switching transistor. The input terminal of the switching transistor is connected to the power input terminal, and the output terminal of the switching transistor is connected to the lighting lamp and the detection module.

7. The control circuit according to claim 6, characterized in that, The detection module includes a third resistor and a fourth resistor. One end of the third resistor is connected to the output terminal of the switching transistor, and the other end of the third resistor is connected to the fourth resistor. The other end of the fourth resistor is grounded. The control module includes a first control interface, which is connected between the third resistor and the fourth resistor.

8. The control circuit according to claim 7, characterized in that, The detection module also includes a filter capacitor, which is connected in parallel with the fourth resistor.

9. The control circuit according to claim 5, characterized in that, It also includes a current limiting module, the input of which is connected between the photosensitive switch module and the detection module, and the output of which is connected to the lighting lamp. The current limiting module is used to divide and limit the voltage at the power input terminal to provide the rated voltage to the lighting lamp.

10. A refrigerator, comprising a door and a cabinet, wherein a light is provided inside the cabinet, characterized in that, The refrigerator further includes a control circuit, which is the control circuit according to any one of claims 5 to 9.

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