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A control circuit, method and air conditioner

A control circuit and control relay technology, applied in the field of control circuits and air conditioners, can solve the problems of air conditioner failure protection, unstable operation, unstable voltage, etc.

Active Publication Date: 2021-08-13
NINGBO AUX ELECTRIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual operation process, due to the influence of various factors on the power supply grid, the voltage is unstable, which may cause the grid to output a higher voltage, making the air conditioner fail-safe and unable to operate stably

Method used

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  • A control circuit, method and air conditioner
  • A control circuit, method and air conditioner
  • A control circuit, method and air conditioner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] see figure 1 , figure 1 Schematically shows the block diagram of the control circuit provided by this embodiment, as figure 1 As shown, the control circuit may include, for example:

[0033] The detection circuit 102 is used to detect the voltage of the grid power supply 101 .

[0034] The voltage of the grid input detection circuit 102 can be divided by series resistors, and the divided voltage signal is transmitted to the amplifier. The amplifier can adjust the voltage by setting the bias voltage and gain of the amplifier through the combination of the capacitor and the resistor. The signal is preprocessed, and then the preprocessed signal is transmitted to the microcontroller chip 103 .

[0035] The micro-control chip 103 is used to receive the voltage signal detected by the detection circuit 102, calculate the average value of the grid voltage detected by the detection circuit 102 within a preset time period, and output the first level signal when the average val...

Embodiment 2

[0044] see figure 2 , figure 2 Schematically shows the structural diagram of the detection circuit provided by this embodiment, as figure 2 As shown, the detection circuit 102 may include, for example:

[0045] The first capacitor C2, the second capacitor C3, the third capacitor C4, the first resistor R1, the second resistor R2 and the third resistor R3. Wherein, the first resistor R1 is connected in parallel with the second resistor R2; the first end of the first capacitor C2 is connected to the first end of the second resistor R2, the second end of the first capacitor C2 is connected to the first end of the third capacitor C4, and the third capacitor The second end of C4 is grounded. The first end of the second capacitor C3 is grounded, the second end is connected to the first end of the third resistor R3, and the second end of the third resistor R3 is connected to the second end of the second resistor R2. Through this design, an RC filter circuit is formed, which can i...

Embodiment 3

[0051] see image 3 , image 3 Schematically shows the structural diagram of the relay control circuit provided by this embodiment, as image 3 As shown, the relay control circuit 104 includes:

[0052] The fifth resistor R14 and the sixth resistor R15, the first end of the fifth resistor R14 is connected to the output end of the microcontroller chip 103, the second end is connected to the base of the triode Q1, and also connected to the first end of the sixth resistor R15 , the emitter of the transistor Q1 and the second end of the sixth resistor R15 are grounded. The collector of the triode Q1 is connected to the relay, and the opening and closing of the relay is controlled by turning on and off the triode Q1 to change the path, so as to control whether the transformer 105 intervenes in the path. When the relay is closed, the transformer 105 is connected to the path, and the grid voltage is stepped down by the transformer 105 to supply power, otherwise, the grid voltage i...

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Abstract

The invention provides a control circuit, a method and an air conditioner. The circuit includes: a detection circuit (102), used for detecting the voltage of a grid power supply (101); a micro-control chip (103), used for calculating the preset The average value of the voltage detected in the time period, when the average value exceeds the first preset value, outputs the first level signal, and when the average value is lower than the first preset value, outputs the second level signal; the relay control circuit (104), which is used to turn on when the micro-control chip outputs the first level signal, and control the relay to pull in, so that the transformer (105) steps down the voltage and supplies power to the air conditioner (106); When the level signal is cut off, the grid power supply (101) directly supplies power to the air conditioner (106). Both the software and hardware of the control circuit are set to filter out interference signals, reducing misjudgment, setting a protection circuit, and improving the reliability of the circuit, so as to realize the stable operation of the air conditioner under high voltage conditions, and the circuit is simple, easy to implement, and low in cost.

Description

technical field [0001] The present invention relates to the technical field of air conditioners, in particular to a control circuit, a method and an air conditioner. Background technique [0002] Existing air-conditioning products have been adapted to 160V ~ 265V voltage, and run stably. However, in the actual operation process, due to the influence of various factors on the power supply grid, the voltage is unstable, which may cause the grid to output a higher voltage, making the air conditioner fail-safe and unable to operate stably. Contents of the invention [0003] The main purpose of the present application is to provide a control circuit, method and air conditioner for at least partially solving the above technical problems. [0004] In order to solve the above problems, the present invention provides a control circuit on the one hand, which is used to control the voltage of the air conditioner 106 during operation, including: a detection circuit 102, which is used...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/88F24F11/64F24F11/61
CPCF24F11/61F24F11/64F24F11/88
Inventor 张伟晖
Owner NINGBO AUX ELECTRIC