Composite consumption reduction circuit of refrigerator main transformer integrated plate

Abstract

The invention provides a composite consumption reduction circuit of a refrigerator main transformer integrated board. The composite consumption reduction circuit comprises a switching power supply module, a refrigerator load control module, a compressor driving module and a composite switch module, the switching power supply module, the refrigerator load control module and the compressor driving module are electrically connected with the composite switch module; the refrigerator load control module is used for controlling on-off of the combination switch module, and the combination switch module is used for controlling the connection state of the compressor driving module and the switching power supply module. On-off of the composite switch module is achieved through circuit signals of the refrigerator load control module, then the connection state of the compressor driving circuit and the switching power supply module is adjusted, standby power consumption is reduced to the maximum extent, and the service life of the refrigerator is prolonged. And meanwhile, the combination switch circuit combines a speed regulation circuit signal of the refrigerator load control module and a switch signal of the compressor driving module, and a special switch signal channel for switching on and off the compressor driving module does not need to be opened up, so that the hardware circuit cost is saved to the greatest extent.

Description

TECHNICAL FIELD

[0001] The present application relates to a variable frequency refrigerator, in particular, to a composite power consumption reduction circuit of a refrigerator main transformer integrated board. BACKGROUND

[0002] The main transformer integrated board of the variable frequency refrigerator is a core control component of the refrigerator, which integrates the main control and variable frequency functions, realizes the core functions such as temperature regulation and frequency control through the PCBA board card, specifically, the main control module is used to monitor the internal temperature of the refrigerator in real time, dynamically adjusts the operating frequency of the compressor to maintain a constant temperature state, and then drives the compressor to operate in variable frequency through the variable frequency drive module, so as to realize energy saving and consumption reduction.

[0003] The main transformer integrated board of the prior art variable frequency refrigerator, the switching power supply simultaneously supplies power to the "refrigerator load control circuit" and the "compressor drive circuit", and in the standby state, that is, the power-on state is maintained in the off state or the compressor stop state.

[0004] Therefore, the above-mentioned refrigerator main transformer integrated board, in the off standby state (user ON / OFF off, no need for refrigeration) and the stop standby state (the compressor 5 stops when reaching the set temperature), even if the compressor does not need to work, the "compressor drive circuit" is in the power-on standby state, consuming power. SUMMARY

[0005] Therefore, in order to solve at least one of the above technical problems, the present application provides a composite power consumption reduction circuit of a refrigerator main transformer integrated board, and the specific technical scheme is as follows: A composite power consumption reduction circuit of a refrigerator main transformer integrated board, comprising a switching power supply module, a refrigerator load control module, a compressor drive module and a composite switch module; The switching power supply module, the refrigerator load control module and the compressor drive module are electrically connected with the composite switch module; The refrigerator load control module is used to control the on-off of the composite switch module, and the composite switch module is used to control the connection state of the compressor drive module and the switching power supply module.

[0006] The composite power consumption reduction circuit of the refrigerator main transformer integrated plate is connected with the refrigerator load control module, the compressor driving module and the switching power supply module through the composite switch module. When the compressor driving module needs to work, the composite switch module is closed to realize the connection of the compressor driving module and the switching power supply module. After the compressor driving module stops working, the composite switch module is disconnected, so that the power supply of the compressor driving module is disconnected, thereby realizing the purpose of maximizing standby power consumption reduction. In addition, the composite switch module is connected or disconnected through the circuit signal of the refrigerator load control module, thereby adjusting the connection state of the compressor driving circuit and the switching power supply module. Therefore, the composite switch circuit of the refrigerator load control module and the switching signal of the compressor driving module are combined, without opening a special switching signal channel for the switching of the compressor driving module, thereby saving the hardware circuit cost to the greatest extent.

[0007] Further, the composite switch module comprises a first conducting element, a second conducting element and a first switch. The first conducting element is located in the connection passage of the refrigerator load control module and the compressor driving module. The second conducting element is located in the connection passage of the refrigerator load control module and the first switch. The first switch is located in the connection passage of the switching power supply module and the compressor driving module.

[0008] Further, the refrigerator load control module comprises a first micro control unit and a photoelectric coupling unit. The first micro control unit is used for controlling a speed regulation PWM signal and a power supply ON signal. The photoelectric coupling unit is connected with the compressor driving module and the first micro control unit, and connected with the first switch and the first micro control unit.

[0009] Further, in the refrigerator load control module, the conducting state between the photoelectric coupling unit and the first conducting element is controlled through the speed regulation PWM signal, and the control of the compressor driving module on the compressor is adjusted. Alternatively, the conducting state between the photoelectric coupling unit and the second conducting element is controlled through the power supply ON signal, and the closing state of the first switch is adjusted.

[0010] Further, the photoelectric coupling unit comprises an LED and a photosensitive triode. The PWM signal or the power supply ON signal is used for adjusting the light emission of the LED. When the LED emits light, the photosensitive triode is turned on.

[0011] Further, the switching power supply module comprises a power supply module, a variable frequency control power supply module and a second switch module. The second switch module is located at a connection path of the power supply module and the variable frequency control power supply module, and the second switch module has a connection relationship with the second conduction element and the first switch. The power supply module is configured to supply power for the variable frequency control power supply module.

[0012] Further, the second switch module comprises a second switch, a first resistor and a second resistor. The first resistor is connected in parallel with the second switch to form a parallel circuit, and the parallel circuit is connected with the power supply module and the variable frequency control power supply module. The second resistor is connected in series with the parallel circuit, and the second resistor is connected with the second conduction element and the second switch, and connected with the second switch and the first switch.

[0013] Further, the power supply module is an auxiliary winding output terminal or an independent switching power supply, and the variable frequency control power supply module is configured to convert VDD into VCC.

[0014] Further, the first switch and the second switch are triodes, and the first conduction element and the second conduction element are diodes.

[0015] Further, the compressor driving module is provided with a second micro control unit, an input end of the second micro control unit is connected with the photoelectric coupling unit, an output end of the second micro control unit is connected with the first switch, and the compressor driving module is configured to be connected with a compressor of a refrigerator. BRIEF DESCRIPTION OF DRAWINGS

[0016] The present application can be further understood from the following description in conjunction with the drawings. The components in the drawings are not necessarily drawn to scale, but emphasis is instead placed on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0017] Figure 1 is a structural schematic diagram of a composite power consumption reduction circuit of a refrigerator main transformer integrated board according to an embodiment of the present application; Figure 2 is a structural principle diagram of a composite power consumption reduction circuit of a refrigerator main transformer integrated board according to an embodiment of the present application; Figure 3 is a structural principle diagram of a switching power supply module of a composite power consumption reduction circuit of a refrigerator main transformer integrated board according to an embodiment of the present application.

[0018] BRIEF DESCRIPTION OF DRAWINGS 1-Switching power supply module; 11-Power supply module; 12-Second switch module; 13-Variable frequency control power supply module; 2-Refrigerator load control module; 3-Compressor drive module; 4-Composite switch module; 5-Compressor. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to its embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of protection of the invention.

[0020] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] In this invention, the terms "first" and "second" do not represent a specific quantity or order, but are merely used to distinguish names.

[0023] like Figures 1-3 As shown, a composite power saving circuit for a refrigerator main transformer integrated board according to an embodiment of the present invention includes a switching power supply module 1, a refrigerator load control module 2, a compressor drive module 3, and a composite switch module 4; the switching power supply module 1, the refrigerator load control module 2, and the compressor drive module 3 are all electrically connected to the composite switch module 4; the refrigerator load control module 2 is used to control the on / off state of the composite switch module 4, and the composite switch module 4 is used to control the connection state between the compressor drive module 3 and the switching power supply module 1.

[0024] In the application, the refrigerator load control module 2, the compressor driving module 3 and the switching power supply module 1 are connected through the composite switch module 4. When the compressor driving module needs to work, the composite switch module 4 is closed to realize the connection between the compressor driving module 3 and the switching power supply module 1. After the compressor driving module 3 stops working, the composite switch module 4 is disconnected, and the power supply of the compressor driving module 3 is disconnected, thereby realizing the purpose of reducing standby power consumption to the maximum extent.

[0025] Further, the on-off state of the composite switch module 4 is realized through the circuit signal of the refrigerator load control module 2, and the connection state of the compressor driving module 3 and the switching power supply module 1 is adjusted. Therefore, the composite switch circuit of the application combines the speed regulation circuit signal of the refrigerator load control module 2 and the switching signal of the compressor driving module 3, without opening a special switching signal channel for the switching of the compressor driving module 3, thereby saving the hardware circuit cost to the maximum extent.

[0026] In one embodiment, the composite switch module 4 includes a first conducting element, a second conducting element and a first switch. The first conducting element is located in the connection path between the refrigerator load control module 2 and the compressor driving module 3. The second conducting element is located in the connection path between the refrigerator load control module 2 and the first switch. The first switch is located in the connection path between the switching power supply module 1 and the compressor driving module 3.

[0027] In the embodiment, the first conducting element is used to control the conduction state of the connection path between the refrigerator load control module 2 and the compressor driving module 3. The refrigerator load control module 2 is used to control the speed regulation of the compressor 5 by the compressor driving module 3. The conduction state of the second conducting element is controlled by the circuit signal of the refrigerator load control module 2, thereby controlling the closing state of the first switch. The conduction state of the connection path between the compressor driving module 3 and the switching power supply module 1 is adjusted. Specifically, when the second conducting element is in the conduction state, the first switch is in the closed state, that is, the compressor driving module 3 and the switching power supply module 1 are connected, and the compressor driving module 3 is in the working state. When the second conducting element is in the cut-off state, the first switch is also in the cut-off state, that is, the compressor driving module 3 and the switching power supply module 1 are not connected, and the compressor driving module 3 no longer consumes electric power, thereby reducing power consumption.

[0028] In one embodiment, the refrigerator load control module 2 includes a first micro control unit and a photoelectric coupling unit. The first micro control unit is used to control the speed regulation PWM signal and the power ON signal. The photoelectric coupling unit connects the compressor driving module 3 and the first micro control unit, and connects the first switch and the first micro control unit.

[0029] In the present application, the first micro control unit sends two kinds of circuit signals, namely the speed regulation PWM signal and the power ON signal, wherein the speed regulation PWM signal is used to make the compressor driving module 3 realize the speed control of the compressor 5, and the ON signal is used to realize the adjustment of the first switch closing state. Specifically, after the first micro control unit sends the circuit signal, the conduction state of the photoelectric coupling unit is controlled, thereby realizing the conduction control of the first conduction element and the second conduction element in the composite switch module 4 by the refrigerator load control module 2, and thereby realizing the control of the compressor driving module 3 or the first switch.

[0030] In some embodiments, the first micro control unit is an MCU controller, such as the MCU1 shown in the figure, through which the speed regulation PWM signal or the power ON signal is sent. Figure 2

[0031] In one of the embodiments, in the refrigerator load control module 2, the conduction state between the photoelectric coupling unit and the first conduction element is controlled by the speed regulation PWM signal to adjust the control of the compressor 5 by the compressor driving module 3; or the conduction state between the photoelectric coupling unit and the second conduction element is controlled by the power ON signal to adjust the closing state of the first switch.

[0032] Through the refrigerator load control module 2, the present application can realize the speed control of the compressor 5 and the power switching of the compressor driving module 3.

[0033] Specifically, when the speed control of the compressor 5 is performed, the speed regulation PWM signal is sent by the MCU1 of the refrigerator load control module 2, and is transmitted to the compressor driving module 3 through the photoelectric coupling unit and the first conduction element. When the speed regulation PWM signal is high level "1", the photoelectric coupling unit is turned on, at this time the first conduction element is also turned on, and through the first conduction element, the compressor driving module 3 obtains low level "0"; correspondingly, when the speed regulation PWM signal is low level "0", the photoelectric coupling unit is not turned on, and the first conduction element is in the cut-off state, at this time the compressor driving module 3 obtains high level "1" through the pull-up resistor.

[0034] It is worth noting that the compressor driving module 3 needs to perform polarity inversion processing analysis on the obtained above-mentioned level signal, so as to obtain the corresponding speed regulation PWM signal and realize the speed control of the compressor 5.

[0035] ​Further specifically, for realizing the power switching of the compressor driving module 3, the MCU 1 of the refrigerator load control module 2 sends the power ON signal before sending the speed regulation PWM signal, at this time, the MCU 1 first outputs the high level "1" of the preset time through the pin to turn on the photoelectric coupling unit, at this time, the second conduction element is also turned on, and the first switch is in the closed state, that is, the compressor driving module 3 is connected with the switching power supply module 1, at this time, if the power supply of the compressor driving module 3 is turned on, the compressor driving module 3 outputs the high level "1", so as to realize the conduction of the switching power supply module 1, and due to the conduction of the switching power supply module 1, the closed state of the first switch is locked, at this time, even if the circuit signal of the refrigerator load control module 2 is removed, the power supply circuit of the compressor driving module 3 is in the conduction state, that is, the compound switch module 4 is closed; further, if the compressor 5 is stopped, the speed regulation PWM signal of the MCU 1 continuously outputs the low level "0", so as to ensure that the compressor driving module 3 is completely closed, and the compressor 5 is prevented from starting accidentally or keeping a small rotating speed, when the rotating speed signal is 0, it indicates that the compressor 5 has been stopped, and thus, when the rotating speed signal is all 0 within the preset time, the photoelectric coupling unit is not turned on, at this time, the second conduction element is cut off, the compressor driving module 3 outputs the low level "0", the first switch is cut off, the switching power supply module 1 is also cut off, at this time, the power supply circuit of the compressor driving module 3 is in the closed state, that is, the compound switch module 4 is tripped, and when the power supply circuit of the compressor driving module 3 is in the closed state, the compressor driving module 3 does not consume the electric power, thereby achieving the technical effect of reducing the power consumption.

[0036] In one of the embodiments, the photoelectric coupling unit comprises an LED and a photosensitive triode, the PWM signal or the power ON signal is used to adjust the light emission of the LED, when the LED emits light, the photosensitive triode is turned on.

[0037] Specifically, when the photoelectric coupling unit receives the high level "1", the LED emits light, at this time, the photosensitive triode is turned on, thereby realizing the conduction of the photoelectric coupling unit, and when the photoelectric coupling unit receives the low level "0", the LED does not emit light, at this time, the photosensitive triode is not turned on.

[0038] In one of the embodiments, the switching power supply module 1 comprises a power supply module 11, a variable frequency control power supply module 13 and a second switch module 12; the second switch module 12 is located in the connection path of the power supply module 11 and the variable frequency control power supply module 13, and the second switch module 12 has a connection relationship with the second conduction element and the first switch; the power supply module 11 is used to supply power for the variable frequency control power supply module 13.

[0039] In the embodiment, when the second switch module 12 is in the on state, the power supply circuit of the compressor driving module 3 is also in the on state, and when the second switch module 12 is in the off state, the power supply circuit of the compressor driving module 3 is in the off state. Further, when the second on element is in the on state, the first switch is in the on state, and when the second on element is in the off state, the first switch is in the off state.

[0040] In one embodiment, the second switch module 12 includes a second switch, a first resistor and a second resistor; the first resistor is connected in parallel with the second switch to form a parallel circuit, and the parallel circuit is connected between the power supply module 11 and the variable frequency control power supply module 13; the second resistor is connected in series with the parallel circuit, and the second resistor is connected between the second on element and the second switch, and between the second switch and the first switch.

[0041] Specifically, as shown in Figure 3 , the first resistor is R6, and the second resistor is R8.

[0042] In one embodiment, the power supply module 11 is an auxiliary winding output end or an independent switching power supply. For the auxiliary winding output end, it is the auxiliary winding output end of the switching power supply. For the independent switching power supply, it is an independent isolated or non-isolated switching power supply. It can be understood that the power supply module 11 is the source of low voltage of the variable frequency control power supply module 13, and the variable frequency control power supply module 13 is used to convert VDD into VCC. Generally, the VDD voltage range is , and the VCC voltage range is +15V and +5V.

[0043] Further specifically, when the second switch module 12 is in the on state, the power supply module 11 and the variable frequency control power supply module 13 are in the on state, and the power supply circuit in the refrigerator main variable integrated board for variable frequency control, i.e. VDD is reduced to +15V and +5V, and the power supply module 11 is used to supply power to the variable frequency control power supply module 13. Thus, when the second switch module 12 is in the on state, the power supply circuit of the compressor driving module 3 is also in the on state.

[0044] In one embodiment, the first switch and the second switch are triodes, and the first on element and the second on element are diodes.

[0045] Specifically, as shown in Figure 2As shown, the first switch is a triode Q1, the second switch is a triode Q2, the first conducting element is a diode D1, and the second conducting element is a diode D2. Specifically, the diode is a PN junction device, having two pins, an anode (P region) and a cathode (N region). When the anode of the diode is connected to a positive voltage and the cathode is connected to a negative voltage, current can pass through the diode, and the diode is turned on. When the anode of the diode is connected to a negative voltage and the cathode is connected to a positive voltage, current can hardly pass through the diode, and the diode is turned off. Further specifically, in a preferred embodiment, the triode is of NPN type. When a positive voltage is applied to the base (B), the PN junction between the base and the emitter (E) is forward biased, and electrons are injected from the emitter into the base. Most of the electrons will pass through the base to the collector (C), forming a collector current. When the collector current reaches a maximum value, the triode switch is closed, i.e. the triode is turned on. When the collector current is almost zero, the triode switch is open, i.e. the triode is turned off.

[0046] In one embodiment, the compressor driving module 3 is provided with a second micro control unit. An input end of the second micro control unit is connected to the opto-coupling unit, and an output end of the second micro control unit is connected to the first switch. The compressor driving module 3 is used to be connected to the compressor 5 of the refrigerator.

[0047] Specifically, as shown in the figure, Figure 2 Further specifically, the second micro control unit MCU2 is of MUC2 type. An input end of the MUC2 is of SPEED pin, which is connected to the first conducting element D1. The first conducting element D1 is connected to the opto-coupling unit OP. Specifically, the anode of the first conducting element D1 is connected to the emitter E of the opto-coupling unit OP, and the cathode is connected to the SPEED pin. When the opto-coupling unit OP is turned on, the SPEED pin obtains a low level "0". When the opto-coupling unit OP is not turned on, the emitter E of the opto-coupling unit OP is floating, the first conducting element D1 has no current path, and is in an off state. At this time, the SPEED pin obtains a high level "1" through an internal pull-up resistor.

[0048] Further specifically, an output end of the second micro control unit MCU2 is of LCK pin, which is connected to the first switch Q1. When the compressor 5 is stopped, the MCU2 judges that the compressor 5 is stopped, and outputs a low level "0" to the LCK pin. At this time, the first switch Q1 is turned off, and the second switch Q2 is also turned off accordingly. At this time, the power supply circuit of the compressor driving module 3 is in a closed state, and does not consume electric power.

[0049] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but it should be considered that any combination of the technical features is within the scope of the present disclosure, as long as the combination does not cause contradiction.

[0050] The above embodiments only express several implementation manners of the present application, which are described in a more specific and detailed manner, but cannot be understood as a limitation on the patent scope of the present application. It should be noted that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A composite power-saving circuit for a refrigerator main transformer integrated board, characterized in that, This includes a switching power supply module, a refrigerator load control module, a compressor drive module, and a composite switch module; The switching power supply module, the refrigerator load control module, and the compressor drive module are all electrically connected to the composite switching module; The refrigerator load control module is used to control the on / off state of the composite switch module, and the composite switch module is used to control the connection status between the compressor drive module and the switching power supply module.

2. The composite power saving circuit of the refrigerator main transformer integrated board according to claim 1, characterized in that, The composite switch module includes a first conducting element, a second conducting element, and a first switch; The first conductive element is located in the connection path between the refrigerator load control module and the compressor drive module; The second conducting element is located in the connection path between the refrigerator load control module and the first switch; The first switch is located in the connection path between the switching power supply module and the compressor drive module.

3. The composite power saving circuit of the refrigerator main transformer integrated board according to claim 2, characterized in that, The refrigerator load control module includes a first microcontroller unit and an optocoupler unit; The first microcontroller unit is used to control the speed regulation PWM signal and the power ON signal; The optocoupler unit connects the compressor drive module and the first microcontroller unit, as well as the first switch and the first microcontroller unit.

4. The composite power saving circuit of the refrigerator main transformer integrated board according to claim 3, characterized in that, In the refrigerator load control module, the conduction state between the optocoupler unit and the first conducting element is controlled by the speed-regulating PWM signal, thereby adjusting the compressor drive module's control over the compressor. Alternatively, the ON signal can be used to control the conduction state between the optocoupler and the second conducting element, thereby adjusting the closed state of the first switch.

5. The composite power saving circuit of the refrigerator main transformer integrated board according to claim 3, characterized in that, The optocoupler unit includes an LED and a phototransistor. The PWM signal or the power ON signal is used to adjust the LED's light emission. When the LED emits light, the phototransistor is turned on.

6. The composite power saving circuit of the refrigerator main transformer integrated board according to claim 2, characterized in that, The switching power supply module includes a power supply module, a frequency conversion control power supply module, and a second switching module. The second switch module is located in the connection path between the power supply module and the frequency conversion control power supply module, and the second switch module is connected to both the second conducting element and the first switch; The power supply module is used to supply power to the frequency converter control power supply module.

7. The composite power saving circuit of the refrigerator main transformer integrated board according to claim 6, characterized in that, The second switch module includes a second switch, a first resistor, and a second resistor; The first resistor and the second switch are connected in parallel to form a parallel circuit, which connects the power supply module and the frequency converter control power supply module. The second resistor is connected in series with the parallel circuit, and the second resistor is connected to the second conducting element and the second switch, as well as connected to the second switch and the first switch.

8. The composite power consumption reduction circuit of the refrigerator main transformer integrated board according to claim 6, characterized in that, The power supply module is either an auxiliary winding output or an independent switching power supply, and the frequency conversion control power supply module is used to convert VDD to VCC.

9. The composite power saving circuit of the refrigerator main transformer integrated board according to claim 7, characterized in that, The first switch and the second switch are transistors, and the first conducting element and the second conducting element are diodes.

10. The composite power saving circuit of the refrigerator main transformer integrated board according to claim 3, characterized in that, The compressor drive module is equipped with a second microcontroller unit. The input terminal of the second microcontroller unit is connected to the optocoupler unit, and the output terminal of the second microcontroller unit is connected to the first switch. The compressor drive module is used to connect to the compressor of the refrigerator.

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