CN218158799U - A general panel circuit for different fans of adaptation - Google Patents
A general panel circuit for different fans of adaptation Download PDFInfo
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- CN218158799U CN218158799U CN202222601301.2U CN202222601301U CN218158799U CN 218158799 U CN218158799 U CN 218158799U CN 202222601301 U CN202222601301 U CN 202222601301U CN 218158799 U CN218158799 U CN 218158799U
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Abstract
The utility model provides a general panel circuit for different fans of adaptation, it includes: a signal input terminal for inputting a Pulse Width Modulation (PWM) signal; the switchable filter circuit is used for switching between the filter circuit and the non-filter circuit and comprises a resistance circuit and a capacitor circuit, the capacitor circuit comprises a capacitor and a field effect transistor used for controlling the capacitor to be connected/disconnected, and the control end of the field effect transistor is in signal connection with a single chip Microcomputer Control Unit (MCU), so that the capacitor is controlled to be connected/disconnected by controlling the on-off of the field effect transistor; the in-phase operational amplifier circuit is used for amplifying the signal output by the switchable filter circuit; and the signal output end is used for outputting the signal amplified by the in-phase operational amplifier circuit. The utility model discloses a same panel can the different fan of adaptation.
Description
Technical Field
The utility model relates to a panel control circuit field especially relates to a general panel circuit that is used for different fans of adaptation.
Background
The brushless fans of the automobile air conditioners in the current market have PWM control modes and 0-10V voltage control modes, and because the control modes of the fans are different, the control panel of the air conditioners needs to be matched by the fans, otherwise, the fans cannot work. This results in a large number of types of panels and an increase in cost. Corresponding to the air conditioner that needs maintenance on the market, if the fan of different models has been changed, the air conditioner panel also need follow and change again. Resulting in increased maintenance and increased cost. Due to different fan control modes, the types of panels are more, the universality is not strong, and the stock of companies is increased.
Therefore, a solution is needed to solve the technical problems of inconvenience in market maintenance, increase in company inventory and increase in cost caused by more types of panels, poor panel universality and the like due to different fan control modes.
SUMMERY OF THE UTILITY MODEL
The utility model designs a general circuit of panel, it can adapt to PWM type fan, also can adapt to 0-10V voltage type fan. The circuit can output PWM control signals or 0-10V voltage signals according to the fan control mode. The circuit can solve the problem that the panel is not universal due to different fan control modes, effectively reduces the types and the inventory of the panels, and solves the increase of the cost. Meanwhile, the maintenance on the market is facilitated.
In order to solve the technical problem, the utility model discloses a general panel circuit for different fans of adaptation, it includes: a signal input terminal for inputting a Pulse Width Modulation (PWM) signal; the switchable filter circuit is used for switching between the filter circuit and the non-filter circuit and comprises a resistance circuit and a capacitor circuit, the capacitor circuit comprises a capacitor and a field effect transistor used for controlling the capacitor to be connected/disconnected, and the control end of the field effect transistor is in signal connection with a single chip Microcomputer Control Unit (MCU), so that the capacitor is controlled to be connected/disconnected by controlling the on-off of the field effect transistor; the in-phase operational amplifier circuit is used for amplifying the signal output from the switchable filter circuit; and the signal output end is used for outputting the signal amplified by the in-phase operational amplifier circuit.
Further, the switchable filter circuit is a switchable two-stage filter circuit comprising a first resistor, a second resistor, a third resistor, a first capacitor, a second capacitor, a third capacitor, a first field effect transistor, a second field effect transistor and a third field effect transistor.
Further, the first resistor, the second resistor and the third resistor are sequentially connected in series between the signal input end and the input end of the in-phase operational amplifier circuit, the first capacitor is connected between the first resistor and the ground terminal, the second capacitor is connected between the third resistor and the ground terminal, the third capacitor is connected between the output end and the ground terminal of the in-phase operational amplifier circuit, the first field effect transistor is connected between the first resistor and the first capacitor, the second field effect transistor is connected between the third resistor and the second capacitor, and the third field effect transistor is connected between the output end of the in-phase operational amplifier circuit and the third capacitor.
Further, the switchable filter circuit further comprises a discharge resistor and a current-limiting protection resistor, wherein the discharge resistor is connected between the second resistor and a ground terminal, and the current-limiting protection resistor is connected between the output end of the in-phase operational amplifier circuit and the third field effect transistor.
Further, the method also comprises the following steps: and the reverse protection diode is arranged at the front end of the signal output end.
Further, the method also comprises the following steps: and the fan feedback sampling circuit is connected between the fan and the MCU and used for detecting fan feedback signals.
Further, fan feedback sampling circuit includes feedback signal input part, sampling circuit and feedback signal output part, the feedback signal input part is connected in order to receive fan feedback signal with the fan, sampling circuit connects the feedback signal input part with between the feedback signal output part for be used for sampling fan feedback signal, feedback signal output part and MCU signal connection are in order to be used for with fan feedback signal after the sampling input to MCU.
The utility model discloses put the performance that has virtual short virtual disconnected according to filter circuit and fortune, through the electric capacity that changes in the circuit, realized the free switching of filtering + fortune circuit and fortune circuit of putting, realized the free switching of PWM signal and 0-10V signal to realized that same panel can the different fan of adaptation.
Drawings
FIG. 1 is a schematic diagram of a universal panel circuit for adapting different fans of the present invention;
fig. 2 is a schematic diagram of the fan feedback sampling circuit of the present invention.
Detailed Description
The technical solutions of the present invention are further described below with reference to specific embodiments, but the present invention is not limited to these embodiments.
The technical scheme of the utility model, a general panel circuit for different fans of adaptation is provided, it includes: a signal input terminal Vin for inputting a pulse width modulation PWM signal; the switchable filter circuit is used for switching between the filter circuit and the non-filter circuit and comprises a resistance circuit and a capacitor circuit, the capacitor circuit comprises a capacitor and a field effect transistor used for controlling the capacitor to be connected/disconnected, and the control end of the field effect transistor is in signal connection with a single chip Microcomputer Control Unit (MCU), so that the capacitor is controlled to be connected/disconnected by controlling the on-off of the field effect transistor; the in-phase operational amplifier circuit is used for amplifying the signal output by the switchable filter circuit; and a signal output end Vout for outputting the signal amplified by the in-phase operational amplifier circuit.
Further, the switchable filter circuit is a switchable two-stage filter circuit including a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a second capacitor C2, a third capacitor C3, a first field effect transistor Q1, a second field effect transistor Q2, and a third field effect transistor Q3.
Further, the first resistor R1, the second resistor R2, and the third resistor R3 are sequentially connected in series between the signal input terminal Vin and the input terminal of the in-phase operational amplifier circuit, the first capacitor C1 is connected between the first resistor R1 and the ground terminal, the second capacitor C2 is connected between the third resistor R3 and the ground terminal, the third capacitor C3 is connected between the output terminal of the in-phase operational amplifier circuit and the ground terminal, the first field effect transistor Q1 is connected between the first resistor R1 and the first capacitor C1, the second field effect transistor Q2 is connected between the third resistor R3 and the second capacitor C2, and the third field effect transistor Q3 is connected between the output terminal of the in-phase operational amplifier circuit and the third capacitor C3.
Further, the switchable filter circuit further comprises a discharge resistor R6 and a current-limiting protection resistor R7, wherein the discharge resistor R6 is connected between the second resistor R2 and a ground terminal, and the current-limiting protection resistor R7 is connected between the output terminal of the in-phase operational amplifier circuit and the third field effect transistor Q3.
Further, the method also comprises the following steps: and the reverse protection diode D1, wherein the reverse protection diode D1 is arranged at the front end of the signal output end Vout.
Further, still include: and the fan feedback sampling circuit is connected between the fan and the MCU and used for detecting a fan feedback signal.
Further, the fan feedback sampling circuit comprises a feedback signal input end FanFb, a sampling circuit and a feedback signal output end FanFb _ MCU, wherein the feedback signal input end is connected with the fan to receive a fan feedback signal, the sampling circuit is connected between the feedback signal input end and the feedback signal output end to sample the fan feedback signal, and the feedback signal output end is in signal connection with the MCU to input the sampled fan feedback signal to the MCU. Referring to fig. 2, it shows the structure schematic diagram of the fan feedback sampling circuit of the present invention.
As shown in fig. 1, the utility model discloses a control circuit is controlled by MCU, MCU is all the time through PA mouth output PWM signal to control circuit's signal input part Vin, under the default state, MCU control Q1, Q2, Q3 switches on, concretely, MCU switches on through exporting high level control Q1, Q2, Q3, thereby make electric capacity C1, C2, C3 participate in circuit work, constitute two-stage filter circuit with R1, R2, R3, the PWM signal of PA mouth output is behind filter circuit, by the filtering become 0-3.3V voltage type signal, behind the U1 looks cophase operational amplifier circuit of back (Vout = Vin (R4 + R5)/R4), output voltage signal is 0-10V. This state can control a 0-10V type voltage type fan.
Under the non-default state, the MCU controls Q1, Q2, and Q3 to be turned off, specifically, the MCU controls Q1, Q2, and Q3 to be turned off by outputting a low level, so that the capacitors C1, C2, and C3 do not participate in the circuit operation, the circuit has no filtering function, the PWM signal output from the PA port passes through the R1, R2, and R3 circuits and is directly sent to the non-inverting input terminal of the operational amplifier, and the PWM signal passes through the following non-inverting operational amplifier circuit of U1 (Vout = Vin (R4 + R5)/R4) and outputs the amplified PWM signal. This state may control a PWM type fan.
In order to make the panel can match the fan in automatic, the technical scheme of the utility model further set up fan feedback sampling circuit, as shown in figure 2. Under the default state, a 0-10V voltage control signal is output firstly, the MCU confirms whether the fan works correctly or not by detecting a fan feedback signal, if the fan does not work, the MCU controls to output a PWM signal and simultaneously detects whether the fan works or not. By the mode, the panel can automatically match with the upper fan, and the same panel can control fans of different models.
The utility model discloses put the performance that has virtual short virtual disconnected according to filter circuit and fortune, through the electric capacity that changes in the circuit, realized the free switching of filtering + fortune circuit and fortune circuit of putting, realized the free switching of PWM signal and 0-10V signal to realize that same panel can the different fan of adaptation.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and improvements can be made without departing from the inventive concept, and all of them belong to the protection scope of the present invention.
Claims (7)
1. A universal panel circuit for adapting to different fans, comprising:
a signal input terminal for inputting a Pulse Width Modulation (PWM) signal;
the switchable filter circuit is used for switching between the filter circuit and the non-filter circuit, the switchable filter circuit comprises a resistance circuit and a capacitance circuit, the capacitance circuit comprises a capacitor and a field effect transistor used for controlling the capacitor to be connected/disconnected, and the control end of the field effect transistor is in signal connection with a single chip Microcomputer Control Unit (MCU), so that the capacitor is controlled to be connected/disconnected by controlling the on-off of the field effect transistor;
the in-phase operational amplifier circuit is used for amplifying the signal output by the switchable filter circuit; and
and the signal output end is used for outputting the signal amplified by the in-phase operational amplifier circuit.
2. The circuit of claim 1, wherein the switchable filter circuit is a switchable two-stage filter circuit comprising first, second, and third resistors, first, second, and third capacitors, and first, second, and third field effect transistors.
3. The circuit of claim 2, wherein the first resistor, the second resistor, and the third resistor are sequentially connected in series between the signal input terminal and the input terminal of the in-phase operational amplifier circuit, the first capacitor is connected between the first resistor and a ground terminal, the second capacitor is connected between the third resistor and the ground terminal, the third capacitor is connected between the output terminal and the ground terminal of the in-phase operational amplifier circuit, the first field effect transistor is connected between the first resistor and the first capacitor, the second field effect transistor is connected between the third resistor and the second capacitor, and the third field effect transistor is connected between the output terminal and the third capacitor of the in-phase operational amplifier circuit.
4. The circuit of claim 3, wherein the switchable filter circuit further comprises a discharge resistor and a current-limiting protection resistor, wherein the discharge resistor is connected between the second resistor and a ground terminal, and the current-limiting protection resistor is connected between the output terminal of the in-phase operational amplifier circuit and the third field effect transistor.
5. The circuit of claim 4, further comprising: and the reverse protection diode is arranged at the front end of the signal output end.
6. The circuit of claim 1, further comprising: and the fan feedback sampling circuit is connected between the fan and the MCU and used for detecting a fan feedback signal.
7. The circuit of claim 6, wherein the fan feedback sampling circuit comprises a feedback signal input terminal, a sampling circuit and a feedback signal output terminal, the feedback signal input terminal is connected with the fan to receive the fan feedback signal, the sampling circuit is connected between the feedback signal input terminal and the feedback signal output terminal to sample the fan feedback signal, and the feedback signal output terminal is in signal connection with the MCU to input the sampled fan feedback signal to the MCU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222601301.2U CN218158799U (en) | 2022-09-30 | 2022-09-30 | A general panel circuit for different fans of adaptation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222601301.2U CN218158799U (en) | 2022-09-30 | 2022-09-30 | A general panel circuit for different fans of adaptation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218158799U true CN218158799U (en) | 2022-12-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222601301.2U Active CN218158799U (en) | 2022-09-30 | 2022-09-30 | A general panel circuit for different fans of adaptation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218158799U (en) |
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2022
- 2022-09-30 CN CN202222601301.2U patent/CN218158799U/en active Active
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