Control circuit for dual power supplies and refrigerator

Abstract

The utility model relates to the technical field of power supply, and discloses a control circuit for dual power supplies. The control circuit comprises a load module comprising a first load and a second load; the power supply module comprises a first power supply branch and a second power supply branch, the first power supply branch is connected with the first load, and the second power supply branch is connected with the second load; the main control module comprises a first main control branch and a second main control branch, the first end of the first main control branch is connected with the first load, the second end of the first main control branch is connected with the first power supply branch, and the first main control branch is configured to control the first power supply branch to supply power to the first load or cut off power from the first load through connection or disconnection of the first main control branch; the first end of the second main control branch is connected with the second load, the second end of the second main control branch is connected with the second power supply branch, and the second main control branch is configured to control the second power supply branch to supply power or cut off power to the second load through connection or disconnection of the second main control branch, so that power consumption can be reduced. The utility model further discloses the refrigerator.

Description

Technical Field

[0001] The present application relates to the field of power supply technology, for example, to a control circuit and a refrigerator for dual power supplies. Background Art

[0002] At present, the related technology usually adopts a unified power supply voltage to power multiple loads so that all loads are working or shut down. However, if some loads do not need power supply, then the related technology often needs to control the unified power supply voltage to realize power off of these loads. Doing so may affect the normal operation of the loads that need to work. On the other hand, if the power-off control is not performed, then the unified power supply voltage will continue to power all loads, which will lead to energy waste and higher power consumption.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0004] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0005] The disclosed embodiments provide a control circuit and a refrigerator for dual power supplies to flexibly control the power on or off of multiple loads, and can power off loads that do not need to work while controlling the loads that need to work to work normally, thereby reducing power consumption.

[0006] In some embodiments, a control circuit for a dual power supply includes: a load module, including a first load and a second load; wherein the power supply voltage required by the first load is different from the power supply voltage required by the second load; a power supply module, including a first power supply branch and a second power supply branch, the first power supply branch is connected to the first load, and is configured to provide a first power supply voltage to the first load; the second power supply branch is connected to the second load, and is configured to provide a second power supply voltage to the second load; wherein: the first supply voltage is greater than or less than the second supply voltage; a main control module, including a first main control branch and a second main control branch; wherein the first end of the first main control branch is connected to the first load, and the second end is connected to the first power supply branch, and is configured to control the first power supply branch to supply power to or cut off power to the first load by turning on or off the first main control branch, and the first end of the second main control branch is connected to the second load, and the second end is connected to the second power supply branch, and is configured to control the second power supply branch to supply power to or cut off power to the second load by turning on or off the second main control branch.

[0007] Optionally, the main control module also includes a first control end, configured to output a first control signal; the first main control branch includes: a first switch tube, a first end connected to the first control end, a second end connected to the first power supply branch, and a third end connected to the first load, configured to be turned on or off according to the first control signal output by the first control end to turn on or off the first main control branch.

[0008] Optionally, the main control module also includes a second control end, configured to output a second control signal; the second main control branch includes: a second switch tube, a first end connected to the second control end, a second end connected to the second power supply branch, and a third end connected to the second load, configured to be turned on or off according to the second control signal output by the second control end to turn on or off the second main control branch.

[0009] Optionally, the power supply module also includes: a power supply end, configured to output an AC voltage; and a rectifier bridge, whose input end is connected to the power supply end and configured to convert the AC voltage into a corresponding DC voltage; wherein the first power supply branch includes: a first switching power supply, whose first end is connected to the output end of the rectifier bridge, and whose second end is connected to the first main control branch, and which is configured to convert the DC voltage output by the rectifier bridge into a first supply voltage; and / or, the second power supply branch includes: a second switching power supply, whose first end is connected to the output end of the rectifier bridge, and whose second end is connected to the second main control branch, and which is configured to convert the DC voltage output by the rectifier bridge into a second supply voltage.

[0010] Optionally, the power supply module further includes: a filter element, a first end of which is connected to the power supply end, and a second end of which is connected to the input end of the rectifier bridge, and is configured to filter out high and low frequency noises of the AC voltage output from the power supply end.

[0011] Optionally, the power supply module also includes: a voltage stabilizing element, a first end of which is respectively connected to the output end of the rectifier bridge and the first switching power supply, and a second end of which is respectively connected to the output end of the rectifier bridge and the second switching power supply, and is configured to stabilize the DC voltage output by the rectifier bridge.

[0012] Optionally, the main control module also includes a third control terminal, configured to output a third control signal; the control circuit also includes: a frequency conversion control module, a first end of which is connected to the third control terminal of the main control module, and a second end is connected to the power supply module, and is configured to power on or off according to the third control signal output by the third control terminal, thereby controlling the operating frequency of the first load and / or the second load.

[0013] Optionally, the frequency conversion control module includes: a frequency conversion control board; a relay, wherein the first control pin and the second control pin are both connected to the third control end of the main control module, the third control pin is connected to the power supply module, and the fourth control pin is connected to the frequency conversion control board, and is configured to turn on or off the third control pin and the fourth control pin according to a third control signal output by the third control end, thereby realizing power on or off of the frequency conversion control board.

[0014] Optionally, the frequency conversion control module further includes: an anti-interference element, a first end of which is connected to the third control pin, and a second end of which is connected to the power supply module, and is configured to improve the anti-interference performance of the frequency conversion control module.

[0015] In some embodiments, a refrigerator includes: a refrigerator body; and, a control circuit for dual power supply as described above, which is arranged in the refrigerator body.

[0016] The embodiments of the present disclosure provide a control circuit and a refrigerator for dual power supplies, which can achieve the following effects:

[0017] Since the power supply voltage requirements of the first load and the second load are different, the first load and the second load are powered by the first power supply branch and the second power supply branch respectively, which can meet the power supply requirements of different loads and avoid the impact of too high or too low power supply voltage on the load, thereby accurately controlling the power supply of different loads according to different power supply requirements, thereby increasing the applicability of the control circuit. At the same time, by setting the first main control branch and the second main control branch, the power on or off of the first load and / or the second load is controlled respectively. In this way, when the corresponding load does not need to be powered, the corresponding main control branch can be disconnected to disconnect the corresponding load, thereby realizing independent, flexible and accurate control of the power supply state of the first load or the second load, avoiding unnecessary waste of electricity, reducing power consumption, and improving energy utilization efficiency.

[0018] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0020] Figure 1 is a schematic diagram of a control circuit for dual power supplies provided by an embodiment of the present disclosure;

[0021] Figure 2 is a schematic diagram of another control circuit for dual power supplies provided by an embodiment of the present disclosure;

[0022] Figure 3 is a schematic diagram of another control circuit for dual power supplies provided by an embodiment of the present disclosure;

[0023] Figure 4 is a schematic diagram of another control circuit for dual power supplies provided by an embodiment of the present disclosure;

[0024] Figure 5It is a schematic diagram of a refrigerator provided in an embodiment of the present disclosure.

[0025] Reference numerals:

[0026] 1. Refrigerator; 100. Refrigerator body; 200. Control circuit for dual power supply;

[0027] 10. Load module; 101. First load; 102. Second load;

[0028] 20. Power supply module; 201. First power supply branch; 2011. First switch power supply; 202. Second power supply branch; 2021. Second switch power supply; 203. Power supply terminal; 2031. Live wire; 2032. Neutral wire; 2033. Pressure sensitive element; 204. Rectifier bridge; 205. Filter element; 206. Voltage stabilizing element;

[0029] 30. Main control module; 301. First main control branch; 302. Second main control branch;

[0030] 40. frequency conversion control module; 401. frequency conversion control board; 402. relay; 403. anti-interference element. DETAILED DESCRIPTION

[0031] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0032] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0033] Unless otherwise stated, the term "plurality" means two or more.

[0034] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0035] The term "correspondence" may refer to an association relationship or a binding relationship. The correspondence between A and B means that there is an association relationship or a binding relationship between A and B.

[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0037] like Figure 1 and Figure 2 As shown, the control circuit 200 for dual power supply provided in the embodiment of the present disclosure includes: a load module 10, a power supply module 20 and a main control module 30. The load module 10 includes a first load 101 and a second load 102. The power supply module 20 includes a first power supply branch 201 and a second power supply branch 202. The first power supply branch 201 is connected to the first load 101 and is configured to provide a first power supply voltage to the first load 101. The second power supply branch 202 is connected to the second load 102 and is configured to provide a second power supply voltage to the second load 102. The main control module 30 includes a first main control branch 301 and a second main control branch 302. Among them, the first end of the first main control branch 301 is connected to the first load 101, and the second end is connected to the first power supply branch 201, and is configured to control the first power supply branch 201 to supply power to or cut off power to the first load 101 by turning on or off the first main control branch 301. The first end of the second main control branch 302 is connected to the second load 102, and the second end is connected to the second power supply branch 202, and is configured to control the second power supply branch 202 to supply power to or cut off power to the second load 102 by turning on or off the second main control branch 302.

[0038] The power supply voltage required by the first load 101 is different from the power supply voltage required by the second load 102. Exemplarily, the power supply voltage required by the first load 101 is greater than the power supply voltage required by the second load 102.

[0039] Wherein: the first supply voltage is greater than or less than the second supply voltage, that is, the first supply voltage is not equal to the second supply voltage. Exemplarily, the first supply voltage is greater than the second supply voltage.

[0040] In the disclosed embodiment, since the power supply voltage requirements of the first load 101 and the second load 102 are different, the first load 101 and the second load 102 are powered by the first power supply branch 201 and the second power supply branch 202, respectively, which can meet the power supply requirements of different loads and avoid the influence of the overly high or too low power supply voltage on the load, thereby accurately controlling the power supply of different loads according to different power supply requirements, thereby increasing the applicability of the control circuit. At the same time, by setting the first main control branch 301 and the second main control branch 302, the power on or off of the first load 101 and / or the second load 102 are controlled respectively. In this way, when the corresponding load does not need to be powered, the corresponding main control branch can be disconnected to disconnect the corresponding load, thereby realizing independent, flexible and accurate control of the power supply state of the first load 101 or the second load 102, avoiding unnecessary power waste, reducing power consumption, and improving energy utilization efficiency.

[0041] Exemplarily, the first load 101 may include devices or components such as a fan, a damper, a heating wire, and the like, and their driving circuits.

[0042] Taking the load as the heating wire in the first load 101 as an example, "the corresponding load needs to be powered, and the situation where it does not need to be powered" is explained with examples. The heating wire is mainly used for defrosting and temperature compensation. When the heating wire is needed for defrosting and temperature compensation, the first power supply branch 201 needs to supply power to the heating wire so that the heating wire works. This requires the first main control branch 301 to be turned on so that the first power supply branch 201 supplies power to the first load 101. This situation is the situation where the corresponding load (heating wire) needs to be powered. When the heating wire is not needed for defrosting and temperature compensation, the first power supply branch 201 does not need to supply power to the heating wire so that the heating wire stops working. This requires the first main control branch 301 to be disconnected to cut off the power to the first load 101. This situation is the situation where the corresponding load (heating wire) does not need to be powered.

[0043] It can be understood that, when the first load 101 is a plurality of devices or components, the first main control branch 301 can be used to control the power on or off of all first loads 101. For example, when the first main control branch 301 is turned on, all first loads 101 are powered on, and the first loads 101 operate normally to achieve corresponding functions. When the first main control branch 301 is disconnected, all first loads 101 are turned off, so that the power consumption of the first power supply branch 201 is 0 power consumption, thereby reducing power consumption.

[0044] Exemplarily, the second load 102 may include: an embedded system or a partial component of a consumer electronic product.

[0045] It can be understood that, when the second load 102 is a plurality of components, the second main control branch 302 can be used to control the power on or off of all the second loads 102. For example, when the second main control branch 302 is turned on, all the second loads 102 are powered on, and the second loads 102 operate normally to achieve the corresponding functions. When the second main control branch 302 is disconnected, all the second loads 102 are turned off, so that the power consumption of the second power supply branch 202 is 0 power consumption, thereby reducing power consumption.

[0046] It should be noted that the first load 101 and the second load 102 may be powered on or off at the same time, or may not be powered on or off at the same time. In the case where the first load 101 and the second load 102 are not powered on at the same time, the power consumption is low.

[0047] Exemplarily, the value range of the first power supply voltage is [8V (volts), 20V]. Specifically, the value range of the first power supply voltage is [11.4V (volts), 12.6V]. More specifically, the first power supply voltage can be set to 12V. In this way, the voltage requirements of devices or components such as fans, dampers, heating wires, and their drive circuits can be met while power consumption is low.

[0048] Exemplarily, the value range of the second power supply voltage is [3V, 8V]. Specifically, the value range of the second power supply voltage is [4.75V, 5.25V]. More specifically, the second power supply voltage can be set to 5V. In this way, the voltage requirements of some components of embedded systems or consumer electronic products can be met while power consumption is lower.

[0049] Optionally, the main control module 30 further includes a first control terminal configured to output a first control signal. In this way, the first control signal output by the first control terminal can control the first main control branch 301 to be turned on or off.

[0050] Optionally, the main control module 30 further includes a second control terminal configured to output a second control signal. In this way, the second control signal output by the second control terminal can control the second main control branch 302 to be turned on or off.

[0051] Wherein, the control signal includes a high-level signal and a low-level signal. Exemplarily, when the first control signal outputted from the first control terminal is a high-level signal, the first main control branch 301 is controlled to be turned on; when the first control signal outputted from the first control terminal is a low-level signal, the first main control branch 301 is controlled to be turned off. And / or, when the second control signal outputted from the second control terminal is a high-level signal, the second main control branch 302 is controlled to be turned on; when the second control signal outputted from the second control terminal is a low-level signal, the second main control branch 302 is controlled to be turned off.

[0052] In the disclosed embodiment, different control terminals are set so that each control terminal controls the corresponding main control branch respectively, so as to realize power supply to the first load 101 and the second load 102 at the same time, or power supply to the first load 101 and the second load 102 at different times, so that the power supply control method is more flexible and convenient.

[0053] Exemplarily, the first control end and / or the second control end may be a single chip microcomputer.

[0054] Optionally, the first main control branch 301 includes a first switch tube. The first end of the first switch tube is connected to the first control end, the second end is connected to the first power supply branch 201, and the third end is connected to the first load 101. The first switch tube is configured to be turned on or off according to a first control signal output by the first control end to turn on or off the first main control branch 301. In this way, the first main control branch 301 is turned on or off by the first switch tube.

[0055] Specifically, when the first control terminal outputs a high level signal, the first switch tube is turned on, thereby turning on the first main control branch 301; when the first control terminal outputs a low level signal, the first switch tube is turned off, thereby turning off the first main control branch 301.

[0056] Exemplarily, the first switch tube is a transistor. Specifically, the gate of the transistor is connected to the first control terminal, the drain is connected to the first power supply branch 201, and the source is connected to the first load 101. More specifically, when the first control terminal outputs a high-level signal, the transistor is turned on to turn on the first main control branch 301; when the first control terminal outputs a low-level signal, the transistor is turned off to turn off the first main control branch 301. In this way, the first main control branch 301 is turned on or off by the transistor.

[0057] Optionally, the second main control branch 302 includes a second switch tube. The first end of the second switch tube is connected to the second control end, the second end is connected to the second power supply branch 202, and the third end is connected to the second load 102, and is configured to be turned on or off according to the second control signal output by the second control end to turn on or off the second main control branch 302.

[0058] Specifically, when the second control terminal outputs a high level signal, the second switch tube is turned on, thereby turning on the second main control branch 302; when the second control terminal outputs a low level signal, the second switch tube is turned off, thereby turning off the second main control branch 302.

[0059] Exemplarily, the second switch is a transistor. Specifically, the gate of the transistor is connected to the second control terminal, the drain is connected to the second power supply branch 202, and the source is connected to the second load 102. More specifically, when the second control terminal outputs a high-level signal, the transistor is turned on to turn on the second main control branch 302; when the second control terminal outputs a low-level signal, the transistor is turned off to turn off the second main control branch 302. In this way, the second main control branch 302 is turned on or off by the transistor.

[0060] Alternatively, if Figure 2 and Figure 4 As shown, the power supply module 20 further includes: a power supply terminal 203 and a rectifier bridge 204. The power supply terminal 203 is configured to output an AC voltage. The input terminal of the rectifier bridge 204 is connected to the power supply terminal 203 and is configured to convert the AC voltage into a corresponding DC voltage.

[0061] Alternatively, if Figure 2 and Figure 4 As shown, the first power supply branch 201 includes a first switching power supply 2011, a first end of the first switching power supply 2011 is connected to the output end of the rectifier bridge 204, and a second end is connected to the first main control branch 301, and is configured to convert the DC voltage output by the rectifier bridge 204 into a first power supply voltage.

[0062] Alternatively, if Figure 2 and Figure 4 As shown, the second power supply branch 202 includes a second switch power supply 2021. The first end of the second switch power supply 2021 is connected to the output end of the rectifier bridge 204, and the second end is connected to the second main control branch 302, and is configured to convert the DC voltage output by the rectifier bridge 204 into a second power supply voltage.

[0063] In the disclosed embodiment, the power supply terminal 203 is used to output an AC voltage. The AC voltage can come from a mains power grid or other AC power sources. By setting a rectifier bridge 204 connected to the power supply terminal 203, the input AC voltage is converted into a corresponding DC voltage. The output end of the rectifier bridge 204 is connected to the first switching power supply 2011 and the second switching power supply 2021 respectively. The first switching power supply 2011 further converts the received DC voltage into the required first supply voltage. The second switching power supply 2021 converts the received DC voltage into the required second supply voltage. Since the first supply voltage and the second supply voltage are not equal, it is possible to power components or devices that require different voltage levels. In this way, the control circuit can effectively convert the input AC voltage into the required DC voltage, and perform fine voltage conversion output, so as to meet the power supply requirements of various devices or components at different voltage levels. In addition, by setting the first switching power supply 2011 and the second switching power supply 2021, it is possible to control the power supply or disconnection of the first load 101 or the second load 102 separately, which is more flexible.

[0064] For example, Figure 2 and 4 As shown, the first switch power supply 2011 includes a Vbus terminal, a first voltage value terminal, a V-terminal and a GND terminal. The Vbus terminal is connected to the output terminal of the rectifier bridge 204 and is configured to receive the DC voltage output by the rectifier bridge 204. The first voltage value terminal is connected to the first main control branch 301 and represents a first specific voltage value, which represents the reference voltage required by the first load 101. For example, the first specific voltage value is 12V (such as Figure 2 and Figure 4 The V- terminal represents the negative pole and is connected to the output terminal of the rectifier bridge 204. The GND terminal is grounded.

[0065] For example, Figure 2 and 4 As shown, the second switch power supply 2021 includes a Vbus terminal, a second voltage value terminal, a V-terminal and a GND terminal. The Vbus terminal is connected to the output terminal of the rectifier bridge 204 and is configured to receive the DC voltage output by the rectifier bridge 204. The second voltage value terminal is connected to the second main control branch 302 and represents a second specific voltage value, which represents the reference voltage required by the second load 102. For example, the second specific voltage value is 5V (such as Figure 2 and Figure 4 The V-terminal represents the negative electrode and is connected to the output terminal of the rectifier bridge 204. The GND terminal is grounded.

[0066] Alternatively, if Figure 2 and 4As shown, the power supply module 20 further includes a filter element 205 . The first end of the filter element 205 is connected to the power supply end 203 , and the second end is connected to the input end of the rectifier bridge 204 , and is configured to filter out high and low frequency noises of the power supply end 203 .

[0067] Alternatively, if Figure 2 and 4 As shown, the power supply module 20 also includes a voltage stabilizing element 206. The first end of the voltage stabilizing element 206 is respectively connected to the output end of the rectifier bridge 204 and the first switch power supply 2011, and the second end is respectively connected to the output end of the rectifier bridge 204 and the second switch power supply 2021, and is configured to stabilize the DC voltage output by the rectifier bridge 204.

[0068] Exemplarily, the voltage stabilizing element 206 may be a voltage stabilizing diode or an electrolytic capacitor. Specifically, the voltage stabilizing element 206 may be a transient voltage suppressor diode, which can improve the voltage stabilizing effect.

[0069] Alternatively, if Figure 2 and 4 As shown, the power supply terminal 203 includes a live wire 2031 and a neutral wire 2032. A fuse is provided at the output end of the live wire 2031, configured to protect the control circuit.

[0070] Alternatively, if Figure 2 and 4 As shown, the power supply end 203 also includes a pressure-sensitive element 2033, a first end of the pressure-sensitive element 2033 is connected to the live wire 2031, and a second end is connected to the neutral wire 2032, and is configured to prevent high-voltage pulses generated by lightning strikes from damaging the load.

[0071] Exemplarily, the pressure-sensitive element 2033 includes a varistor. Using a varistor to realize a pressure-sensitive function is low-cost and easy to implement.

[0072] Optionally, the main control module 30 further includes a third control terminal configured to output a third control signal. It is understandable that the third control terminal can be the same control terminal as the first control terminal or the second control terminal, which can save energy consumption and reduce costs; or it can be a different control terminal from the first control terminal and the second control terminal, which can make the control more flexible.

[0073] Alternatively, if Figure 3 As shown, the control circuit further includes a frequency conversion control module 40. The first end of the frequency conversion control module 40 is connected to the third control end of the main control module 30, and the second end is connected to the power supply module 20, and is configured to power on or off according to the third control signal output by the third control end, so as to control the operating frequency of the first load 101 and / or the second load 102.

[0074] In the disclosed embodiment, the first end of the frequency conversion control module 40 is connected to the third control end of the main control module 30 to receive the third control signal output by the third control end of the main control module 30. The second end of the frequency conversion control module 40 is connected to the power supply module 20 to receive the power supply voltage provided by the power supply module 20. In this way, the frequency conversion control module 40 can be powered on or off according to the third control signal received from the main control module 30. When the frequency conversion control module 40 is powered on, the operating frequency of the first load 101 and / or the second load 102 can be accurately adjusted; when the frequency conversion control module 40 is powered off, the power consumption can be further reduced.

[0075] Alternatively, if Figure 4 As shown, the frequency conversion control module 40 includes a frequency conversion control board 401 and a relay 402. The first control pin and the second control pin of the relay 402 are both connected to the third control terminal of the main control module 30, the third control pin is connected to the power supply module 20, and the fourth control pin is connected to the frequency conversion control board 401, and is configured to turn on or off the third control pin and the fourth control pin according to the third control signal output by the third control terminal, so as to realize power on or off of the frequency conversion control board 401.

[0076] Exemplarily, when the third control terminal outputs a high-level signal, the third control pin and the fourth control pin of the relay 402 are turned on, thereby powering on the frequency conversion control board 401; when the third control terminal outputs a low-level signal, the third control pin and the fourth control pin of the relay 402 are turned off, thereby powering off the frequency conversion control board 401.

[0077] In the disclosed embodiment, the power on or off of the frequency conversion control board 401 is realized by the relay 402. When the frequency conversion control board 401 is powered on, the operating frequency of the first load 101 and / or the second load 102 can be accurately adjusted; when the frequency conversion control board 401 is powered off, the frequency conversion control board 401 is in a zero power consumption state, thereby further reducing power consumption.

[0078] Exemplarily, the third control pin of the relay 402 is connected to the power supply terminal 203 of the power supply module 20. In this way, the power supply module 20 can provide an AC voltage to the frequency conversion control board 401.

[0079] Alternatively, if Figure 4 As shown, the frequency conversion control module 40 further includes an anti-interference element 403 . The first end of the anti-interference element 403 is connected to the third control pin, and the second end is connected to the power supply module 20 , and is configured to improve the anti-interference performance of the frequency conversion control module 40 .

[0080] Optionally, the frequency conversion control module 40 further includes an anti-interference element 403. The first end of the anti-interference element 403 is respectively connected to the third control pin and the live wire 2031, and the second end is connected to the neutral wire 2032, and is configured to improve the anti-interference performance of the control circuit.

[0081] Exemplarily, the anti-interference element 403 includes a common mode inductor and / or a common mode choke. In this way, the common mode noise in the circuit can be suppressed by the common mode inductor and / or the common mode choke to achieve the effect of improving the anti-interference performance.

[0082] like Figure 5 As shown, a refrigerator 1 is provided in an embodiment of the present disclosure. The refrigerator 1 includes: a refrigerator body 100 and a control circuit 200 for dual power supply as described above. The control circuit 200 for dual power supply is arranged in the refrigerator body 100. The installation relationship described here is not limited to being placed inside the refrigerator body 100, but also includes installation connections with other components of the refrigerator body 100, including but not limited to physical connections, electrical connections or signal transmission connections, etc. Those skilled in the art can understand that the control circuit 200 for dual power supply can be adapted to a feasible refrigerator body 100, thereby realizing other feasible embodiments.

[0083] In this way, the control circuit 200 for dual power supply is arranged in the refrigerator body 100 to flexibly control the power on or off of the first load 101 and / or the second load 102, and can cut off the power of the first load 101 and / or the second load 102 when the first load 101 and / or the second load 102 do not need to work, thereby reducing the overall power consumption of the refrigerator 1.

[0084] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them.Other embodiments may include structural, logical, electrical, process, and other changes.

[0085] The embodiments are representative of possible variations only. Individual components and functions are optional unless explicitly required, and the order of operations may vary.

[0086] The parts and features of some embodiments may be included in or replace the parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and claims, unless the context clearly indicates, the singular "a" (a), "an" (an) and "the" (the) are intended to include plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of listings that include one or more associated ones.

[0087] In addition, when used in this application, the term "comprise" and its variants "comprises" and / or comprising refer to the presence of stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or groups thereof. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the presence of other identical elements in the process, method or device that includes the elements.

[0088] In this article, each embodiment may focus on the differences from other embodiments, and the same or similar parts between the embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts may refer to the description of the method part.

[0089] The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A control circuit for dual power supply, characterized in that: include: A load module, comprising a first load and a second load; wherein a power supply voltage required by the first load is different from a power supply voltage required by the second load; A power supply module, comprising a first power supply branch and a second power supply branch, wherein the first power supply branch is connected to a first load and is configured to provide a first power supply voltage to the first load, and the second power supply branch is connected to a second load and is configured to provide a second power supply voltage to the second load; wherein: the first power supply voltage is greater than or less than the second power supply voltage; A main control module comprises a first main control branch and a second main control branch; wherein, the first end of the first main control branch is connected to the first load, and the second end is connected to the first power supply branch, and is configured to control the first power supply branch to supply power to or cut off power to the first load by turning on or off the first main control branch; the first end of the second main control branch is connected to the second load, and the second end is connected to the second power supply branch, and is configured to control the second power supply branch to supply power to or cut off power to the second load by turning on or off the second main control branch.

2. The control circuit according to claim 1, characterized in that: The main control module also includes a first control terminal configured to output a first control signal; the first main control branch includes: The first switch tube has a first end connected to the first control end, a second end connected to the first power supply branch, and a third end connected to the first load, and is configured to be turned on or off according to a first control signal output from the first control end to turn on or off the first main control branch.

3. The control circuit according to claim 1, characterized in that: The main control module also includes a second control terminal configured to output a second control signal; the second main control branch includes: The second switch tube has a first end connected to the second control end, a second end connected to the second power supply branch, and a third end connected to the second load, and is configured to be turned on or off according to a second control signal output from the second control end to turn on or off the second main control branch.

4. The control circuit according to claim 1, characterized in that: The power supply module also includes: a power supply terminal configured to output an AC voltage; and a rectifier bridge, the input end of which is connected to the power supply terminal and configured to convert the AC voltage into a corresponding DC voltage; wherein, The first power supply branch includes: A first switching power supply, a first end of which is connected to the output end of the rectifier bridge, a second end of which is connected to the first main control branch, and is configured to convert the DC voltage output by the rectifier bridge into a first power supply voltage; and / or, The second power supply branch includes: The second switching power supply has a first end connected to the output end of the rectifier bridge and a second end connected to the second main control branch, and is configured to convert the DC voltage output by the rectifier bridge into a second power supply voltage.

5. The control circuit according to claim 4, characterized in that: The power supply module also includes: The filter element has a first end connected to the power supply end and a second end connected to the input end of the rectifier bridge, and is configured to filter out high and low frequency noises of the AC voltage output by the power supply end.

6. The control circuit according to claim 4, characterized in that: The power supply module also includes: The voltage stabilizing element has a first end connected to the output end of the rectifier bridge and the first switching power supply respectively, and a second end connected to the output end of the rectifier bridge and the second switching power supply respectively, and is configured to stabilize the DC voltage output by the rectifier bridge.

7. The control circuit according to any one of claims 1 to 6, characterized in that: The main control module further includes a third control terminal configured to output a third control signal; the control circuit further includes: The frequency conversion control module has a first end connected to the third control end of the main control module and a second end connected to the power supply module, and is configured to power on or off according to a third control signal output by the third control end, thereby controlling the operating frequency of the first load and / or the second load.

8. The control circuit according to claim 7, characterized in that: The frequency conversion control module includes: Frequency conversion control board; The relay, the first control pin and the second control pin are both connected to the third control end of the main control module, the third control pin is connected to the power supply module, and the fourth control pin is connected to the frequency conversion control board. It is configured to turn on or off the third control pin and the fourth control pin according to the third control signal output by the third control end, thereby realizing power on or off of the frequency conversion control board.

9. The control circuit according to claim 8, characterized in that: The frequency conversion control module also includes: The anti-interference element has a first end connected to the third control pin and a second end connected to the power supply module, and is configured to improve the anti-interference performance of the frequency conversion control module.

10. A refrigerator, characterized in that: include: Refrigerator body; and, The control circuit for dual power supply as described in any one of claims 1 to 9 is arranged in the refrigerator body.

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