CN211630068U - Switching power supply control circuit capable of realizing frequency switching and air conditioning equipment - Google Patents
Switching power supply control circuit capable of realizing frequency switching and air conditioning equipment Download PDFInfo
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- CN211630068U CN211630068U CN202020013817.3U CN202020013817U CN211630068U CN 211630068 U CN211630068 U CN 211630068U CN 202020013817 U CN202020013817 U CN 202020013817U CN 211630068 U CN211630068 U CN 211630068U
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Abstract
The utility model discloses a switching power supply control circuit and air conditioning equipment that can realize frequency switching. Wherein, this circuit includes: the circuit comprises: the system comprises a power supply chip, an execution unit and an MCU; the input end of the MCU is connected with the equipment, and the output end of the MCU is connected with the execution unit and is used for detecting the working state of the equipment and sending a control signal to the execution unit according to the working state of the equipment so as to control the working frequency of the switching power supply; the execution unit is used for controlling the conduction relation with the inside of the power supply chip so as to realize different working frequencies of the switching power supply; the power supply chip is connected with the positive electrode of the switching power supply. Through the utility model discloses, can be under equipment standby state, control switch power is with lower frequency work, and the low-power consumption standby is realized to messenger's equipment to the reduction consumption.
Description
Technical Field
The utility model relates to an electron electric power technical field particularly, relates to a switching power supply control circuit and air conditioning equipment that can realize frequency switching.
Background
With the wide application and popularization of electrical equipment, the requirements of the public on the electrical equipment not only stay in the application effect, but also gradually consider the problem of power consumption of the electrical equipment.
However, the standby and normal operation phases of the electrical equipment have power consumption problems, and the switching power supply is designed to generate switching loss inevitably. In the operation process of the equipment, the switching power supply adjusts the output balance of the rear end through a feedback loop. The air conditioner controller in the market at present generally adopts a fixed frequency switch. The switching frequency cannot be adjusted according to the load, and only the duty ratio can be adjusted. The fixed frequency switch generates a large loss during the standby process of the device.
Aiming at the problem that in the prior art, the standby process of the equipment still has larger power consumption due to the fixed switching frequency, an effective solution is not provided at present.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides an in provide a switching power supply control circuit and air conditioning equipment that can realize frequency switching to there is the problem of great consumption still among the equipment standby process because switching frequency is fixed to lead to among the solution prior art.
In order to solve the above technical problem, the utility model provides a switching power supply control circuit that can realize frequency switching, wherein, the circuit includes: the system comprises a power supply chip, an execution unit and an MCU;
the input end of the MCU is connected with the equipment, and the output end of the MCU is connected with the execution unit and is used for detecting the working state of the equipment and sending a control signal to the execution unit according to the working state of the equipment so as to control the working frequency of the switching power supply;
the execution unit is used for realizing different conduction relations with the power supply chip so as to realize different working frequencies of the switching power supply;
the power supply chip is connected with the positive electrode of the switching power supply.
Furthermore, the power supply chip comprises a frequency pin, a control pin and a source electrode pin;
the conducting relation comprises: the frequency pin is conducted with the source electrode pin, or the frequency pin is conducted with the control pin.
Further, when the frequency pin is conducted with the source electrode pin, the working frequency of the switching power supply is a first frequency;
when the frequency pin is conducted with the control pin, the working frequency of the switching power supply is a second frequency;
the second frequency is greater than the first frequency.
Further, the MCU includes:
the first control unit is used for controlling the frequency pin to be conducted with the source electrode pin when the equipment is in a standby state, and further controlling the switching power supply to work at a first frequency;
and the second control unit is used for controlling the frequency pin to be conducted with the control pin when the equipment is in a normal operation state, so as to control the switching power supply to work at a second frequency.
Further, the circuit further comprises:
and the input end of the feedback circuit is connected with the MCU, and the output end of the feedback circuit is respectively connected with the anode of the switching power supply and the control pin of the switching power supply chip and is used for controlling the input voltage of the load to be kept stable.
Further, the feedback circuit includes:
the first end and the second end of the input side of the photoelectric coupler are connected with the MCU, the first end of the output side of the photoelectric coupler is connected with the power supply voltage input end of the power supply chip, and the second end of the photoelectric coupler is connected with the control pin of the power supply chip.
Further, the circuit further comprises:
and one end of the voltage conversion module is connected with the anode of the switching power supply, and the other end of the voltage conversion module is connected with the MCU and used for reducing the voltage output by the switching power supply and then outputting the reduced voltage to the MCU.
Further, the voltage conversion module is a transformer.
The utility model also provides an air conditioning equipment, including above-mentioned switching power supply control circuit.
Use the technical scheme of the utility model, through check out test set's operating condition, according to the frequency switching of the operating condition control execution unit that equipment was located, under equipment standby state, control execution unit is with lower frequency work, and the low-power consumption standby is realized to the messenger equipment to the reduction consumption.
Drawings
Fig. 1 is a structural diagram of a switching power supply control circuit according to an embodiment of the present invention;
fig. 2 is a block diagram of a switching power supply control circuit according to another embodiment of the present invention;
fig. 3 is a structural diagram of a switching power supply control circuit according to still another embodiment of the present invention;
fig. 4 is a specific structure diagram of a switching power supply control circuit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, etc. may be used to describe different frequencies in embodiments of the present invention, these frequencies should not be limited to these terms. These terms are only used to distinguish between different frequencies. For example, the first frequency may also be referred to as the second frequency, and similarly, the second frequency may also be referred to as the first frequency, without departing from the scope of embodiments of the present invention.
The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in the article or device in which the element is included.
The following describes in detail alternative embodiments of the present invention with reference to the accompanying drawings.
Example 1
This embodiment provides a switching power supply control circuit that can realize frequency switching, and fig. 1 is according to the utility model discloses switching power supply control circuit's structure chart, as shown in fig. 1, the circuit includes: the power supply comprises a power supply chip 11, an execution unit 12 and an MCU13, wherein the MCU13 has an input end connected with equipment and an output end connected with the execution unit 12, and is used for detecting the working state of the equipment and sending a control signal to the execution unit 12 according to the working state of the equipment so as to control the working frequency of the switching power supply; the execution unit 12 may be a built-in dual-control switch, and different conduction relationships between the execution unit and the power chip 11 correspond to different operating frequencies.
In specific implementation, the detection of the working state of the device is realized by detecting the current, voltage or power of the load 14 in the device, because the current, voltage or power of the load is different between the standby state and the normal working state of the device, generally speaking, the current, voltage and power of the load are much lower than the normal working state of the device in the standby state of the device, so the MCU13 can determine whether the device is in the standby state or the normal working state by detecting the current, voltage or power of the load 14, and specifically, by which way to realize the determination of the working state of the device, a person skilled in the art can select according to actual needs, the present invention is not limited specifically, in addition, the number of the loads here may be one or more, and after the determination of the working state of the device is completed, the MCU13 can determine according to different determination results, different control signals are sent to the execution unit 12 to control the conduction relationship inside the execution unit 12, and further control the conduction relationship inside the power chip 11, and different conduction relationships correspond to different execution unit operating frequencies, so that the operating frequency of the switching power supply can be controlled according to the operating state of the device, and the MCU13 is also used for supplying power to the execution unit 12.
It should be noted that the device is preferably an air conditioning device, and may also be any electric device that needs to be controlled by a power chip, such as a water heater, a dehumidifier, a humidifier, and a centrifuge, and the present invention is not limited in particular.
The switching power supply control circuit capable of realizing frequency switching controls the frequency switching of the switching power supply according to the working state of the equipment by detecting the working state of the equipment, and controls the switching power supply to work at a lower frequency in the standby state of the equipment, so that the power consumption is reduced, and the equipment is enabled to realize low-power standby.
Example 2
This embodiment provides another switching power supply control circuit capable of realizing frequency switching, fig. 2 is a structural diagram of a switching power supply control circuit according to another embodiment of the present invention, in order to further realize that the power chip 11 and the execution unit 12 switch conduction relationships according to the operating state of the device, this embodiment is further improved on the basis of embodiment 1, and as shown in fig. 2, the power chip includes a frequency pin F, a control pin C and a source pin S; the frequency pin F is connected to the first pin 1 of the execution unit 12, the control pin C is connected to the second pin 2 of the execution unit 12, the source pin S is connected to the third pin 3 of the execution unit 12, and the conduction relationship specifically includes: the third pin 3 inside the execution unit 12 is connected with the first pin 1, so that the frequency pin F is connected with the source electrode pin S, or the first pin 1 and the second pin 2 inside the execution unit 12 are connected, so that the frequency pin F is connected with the control pin C, and the power chip is connected with the positive electrode of the switching power supply.
In this embodiment, it is required to switch the operating frequency of the execution unit according to different operating states of the device, so that when the frequency pin F is connected to the source pin S, the operating frequency of the switching power supply is the first frequency; when the frequency pin F is conducted with the control pin C, the working frequency of the switching power supply is a second frequency; the second frequency is greater than the first frequency, that is, when the frequency pin F is connected to the source pin S, the switching power supply operates at a lower frequency, and when the frequency pin F is connected to the control pin C, the switching power supply operates at a higher frequency.
In this embodiment, in order to control the conducting state of the power chip 11 and the execution unit 12, as shown in fig. 2, the MCU13 includes: the first control unit 131 is configured to send a first control signal to the control interface IO of the execution unit 12 when the device is in a standby state, control the frequency pin F to be connected to the source pin S, and further control the switching power supply to operate at a first frequency, that is, control the switching power supply to operate at a lower frequency, so as to reduce power loss, and meanwhile, prevent the switching power supply from being frequently turned off and connected, so as to reduce loss of devices; the MCU13 further includes a second control unit 132, configured to send a second control signal to the control interface IO of the execution unit 12 when the device is in a normal operation state, to control the frequency pin F to be connected to the control pin C, so as to control the switching power supply to operate at a second frequency, i.e., to implement the operation of the switching power supply at a higher frequency, so as to meet the requirement of efficient output of the high frequency band of the switching power supply.
In order to control the output of the switching power supply according to the device voltage fed back by the MCU and achieve stable voltage output, as shown in fig. 2, the circuit further includes: feedback circuit 15, MCU is connected to the input, and the positive pole of switching power supply and switching power supply chip 11's control pin C are connected respectively to the output for the input voltage of control load remains stable, specifically, feedback circuit 15 can include: photoelectric coupler, skilled person in the art should know, photoelectric coupler includes input side and output side, and input side and output side are individual to include two links, form respectively and switch on the return circuit, realize strong and weak electric isolation, in this embodiment, the first end and the second end connection of photoelectric coupler's input side are respectively MCU 13's two of them pins for the voltage of the load of receiving MCU feedback, the first end connection switching power supply positive pole of output side, the second end inserts power chip 11's control pin C.
In practical implementation, since the MCU13 is substantially a control chip, the operating voltage of the chip is generally low, and in order to convert the higher voltage provided by the power supply into a lower voltage and output the lower voltage to the MCU13, the circuit further includes: voltage conversion module 16, voltage conversion module 16's one end is connected the power, and the other end is connected MCU13, be used for with output after the voltage of switching power supply output reduces extremely MCU13, specifically, voltage conversion module is the transformer, the first end of transformer primary coil is connected the switching power supply positive pole, and the second end is connected the first end of optoelectronic coupler's output side, and secondary coil's both ends are connected two of them pins of MCU13, through this transformer, can realize converting the higher voltage that the power provided into lower voltage, export extremely MCU 13.
In specific implementation, in order to input a voltage signal to the execution unit 12 and realize power supply to the execution unit 12, the MCU13 is connected to the VCC pin and the GND pin of the execution unit 12, respectively.
It should be noted that, in order to highlight the key point of the present invention, only the scheme for controlling the switching of the frequency of the switching power supply is described in detail in the foregoing embodiments, and those skilled in the art should understand that the implementation of the power supply to the load by the switching power supply needs to be implemented by combining with other corresponding circuits, which are well known in the art, and therefore, the details are not described herein again.
Example 3
Taking an application scenario as an air conditioner as an example, a further alternative embodiment of the present invention is described in detail below, and fig. 3 is a structural diagram of a switching power supply control circuit according to another embodiment of the present invention, and as shown in fig. 3, the switching power supply control circuit of this embodiment includes a switching power supply chip 311 (i.e. the power supply chip 11 in the above embodiment), a built-in dual control switch 312 (i.e. the execution unit 12 in the above embodiment), a main control chip 313 (i.e. the MCU13 in the above embodiment), a load 314 of an air conditioning device (i.e. the load 14 in the above embodiment), a feedback module 315 (i.e. the feedback circuit 15 in the above embodiment), and a transformer 316 (i.e. the voltage conversion module 16 in the above embodiment), an input end of the main control chip 313 is connected to the load 314 of the, and according to the working state of the load 314 of the air conditioning equipment, different control signals are sent to the internal dual-control switch 312 to control the conduction relationship inside the internal dual-control switch 312, and further control the conduction relationship inside the switching power supply chip 311, specifically, the conduction relationship includes: the frequency pin F of the switching power chip 311 is connected to the source pin S, or the frequency pin F of the switching power chip 311 is connected to the control pin C, when the frequency pin F of the switching power chip 311 is connected to the source pin S, the switching power operates at a lower frequency (e.g., 66KHZ), and when the frequency pin F of the switching power chip 311 is connected to the control pin C, the switching power operates at a higher frequency (e.g., 132HZ), and according to the formula, the cycle t is 1/frequency F, the higher the execution unit frequency F of the switching power is, the shorter the cycle t is, that is, the more times the execution unit is turned on and off at the same time is, and the larger the power loss of the air conditioner is, but in a standby state of the air conditioner, the switching power is not required to be turned on and off frequently, and therefore, in the standby state of the air conditioner, the working frequency of the switching power supply can be properly reduced to reduce power consumption and avoid the loss of the switching power supply.
Fig. 4 is the basis the utility model discloses switching power supply control circuit's specific structure chart, as shown in fig. 4 the utility model discloses an in the embodiment, feedback module 315 is optoelectronic coupler, and two links of this optoelectronic coupler's input side are connected respectively the zero line L that loops through electric capacity C, rectifier 317 junction switch power supply is connected to two of them pins of main control chip 313, the first link connection of output side, and the second end of output side connects switching power supply chip 311's control pin for according to the load voltage of the air conditioner of main control chip 313 feedback, output stable voltage signal.
As shown in fig. 4, in an embodiment of the present invention, the frequency pin F, the control pin C, and the source pins S1-S6 of the switching power chip 311 are respectively connected to the first pin 31, the second pin 32, and the third pin 33 of the built-in dual-control switch 312.
In an embodiment of the present invention, the two ends of the primary coil of the transformer 316 are respectively connected to the first ends of the output sides of the capacitor C and the feedback module 315, and the two connecting sections of the secondary coil are respectively connected to the two pins of the main control chip 313.
In an embodiment of the present invention, in order to input a control signal to the built-in dual control switch 312, the implementation is right the control of the built-in dual control switch 312, the main control chip 313 supplies power to the built-in dual control switch 312 through the VCC pin and the GND pin of the built-in dual control switch 312, and sends a control signal to the built-in dual control switch 312 through the IO pin connection.
The existing control scheme of the switching power supply is to realize the on-off state of the execution unit by adjusting the duty ratio of the switch, and the duty ratio can be continuously adjusted according to different load requirements, namely the switching power supply is continuously switched on and off, so that energy is stored for the rear-end winding T to realize the power supply to the load 314.
The control principle of the embodiment includes: when the air conditioning system is powered on, the main control chip 313 detects that the air conditioner is in a standby state at the moment, the main control chip 313 controls the conduction relation inside the electronic execution unit according to internal logic thereof, and further controls the frequency pin F of the switching power supply chip 311 to be conducted with the source electrode pin S, at the moment, the switching power supply works at a lower frequency, such as 66KHZ, and the working frequency of the switching power supply is lower than that of the air conditioner during normal operation, so that the loss of the switching power supply is reduced;
when the air conditioning system receives an external instruction and is started, the main control chip 313 controls the air conditioner to execute a load output command;
the air conditioner executes a load output command, so that after the load starts to operate, the main control chip 313 detects that the load power of the air conditioner is increased, the conduction relation inside the built-in double-control switch 312 is further changed, the frequency pin F of the switching power supply chip 311 is connected with the control pin C, and the switching power supply operates at a higher frequency, such as 132KHZ, so that the high-efficiency output of the high frequency band of the switching power supply is met;
when the air conditioner enters the standby state again, the main control chip 313 controls the switching power supply to operate at a lower frequency again.
According to the external instruction information, the main control chip 314 controls the built-in dual-control switch 312 to execute corresponding actions, so that the switching power supply works in the most effective frequency band. The aim of low power consumption in a standby state is fulfilled.
The switching power supply control circuit of this embodiment, through main control chip 313, the built-in double control switch 312 and switching power supply chip 311 realize that the air conditioner reduces the execution unit frequency under standby state and reaches the low power consumption control of air conditioner, furthermore, when the air conditioner receives load output instruction, main control chip 314 controls the load and carries out corresponding action, load power increases, and then electric current or voltage increase, feedback module receives the electric current or the voltage change of load, feedback module 315 is according to the electric current or the voltage change control switching power supply's of load output stabilization voltage to the load, satisfy the high-efficient output of switching power supply high frequency channel, through the scheme of this embodiment, can realize avoiding air conditioner standby state power consumption serious, save the electric energy, thereby promote the competitiveness of air conditioner in the market.
Example 4
The embodiment provides an air conditioning device, which comprises the switching power supply control circuit capable of realizing frequency switching.
The above-described circuit embodiments are only illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (9)
1. A switching power supply control circuit, the circuit comprising: the system comprises a power supply chip, an execution unit and an MCU;
the input end of the MCU is connected with the equipment, and the output end of the MCU is connected with the execution unit and is used for detecting the working state of the equipment and sending a control signal to the execution unit according to the working state of the equipment so as to control the working frequency of the switching power supply;
the execution unit is used for controlling the conduction relation with the inside of the power supply chip so as to realize different working frequencies of the switching power supply;
the power supply chip is connected with the positive electrode of the switching power supply.
2. The circuit of claim 1,
the power supply chip comprises a frequency pin, a control pin and a source electrode pin;
the conducting relation comprises: the frequency pin is conducted with the source electrode pin, or the frequency pin is conducted with the control pin.
3. The circuit of claim 2,
when the frequency pin is conducted with the source electrode pin, the working frequency of the switching power supply is a first frequency;
when the frequency pin is conducted with the control pin, the working frequency of the switching power supply is a second frequency;
the second frequency is greater than the first frequency.
4. The circuit of claim 2, wherein the MCU comprises:
the first control unit is used for controlling the frequency pin to be conducted with the source electrode pin when the equipment is in a standby state, and further controlling the switching power supply to work at a first frequency;
and the second control unit is used for controlling the frequency pin to be conducted with the control pin when the equipment is in a normal operation state, so as to control the switching power supply to work at a second frequency.
5. The circuit of claim 2, further comprising:
and the input end of the feedback circuit is connected with the MCU, and the output end of the feedback circuit is respectively connected with the anode of the switching power supply and the control pin of the switching power supply chip and is used for controlling the input voltage of the load to be kept stable.
6. The circuit of claim 5, wherein the feedback circuit comprises:
the first end and the second end of the input side of the photoelectric coupler are connected with the MCU, the first end of the output side of the photoelectric coupler is connected with the power supply voltage input end of the power supply chip, and the second end of the photoelectric coupler is connected with the control pin of the power supply chip.
7. The circuit of claim 1, further comprising:
and one end of the voltage conversion module is connected with the anode of the switching power supply, and the other end of the voltage conversion module is connected with the MCU and used for reducing the voltage output by the switching power supply and then outputting the reduced voltage to the MCU.
8. The circuit of claim 7, wherein the voltage conversion module is a transformer.
9. An air conditioning apparatus characterized by comprising the switching power supply control circuit according to any one of claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020013817.3U CN211630068U (en) | 2020-01-02 | 2020-01-02 | Switching power supply control circuit capable of realizing frequency switching and air conditioning equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020013817.3U CN211630068U (en) | 2020-01-02 | 2020-01-02 | Switching power supply control circuit capable of realizing frequency switching and air conditioning equipment |
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| CN211630068U true CN211630068U (en) | 2020-10-02 |
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| CN202020013817.3U Active CN211630068U (en) | 2020-01-02 | 2020-01-02 | Switching power supply control circuit capable of realizing frequency switching and air conditioning equipment |
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