CN216561500U - Output control circuit, controller and air conditioner - Google Patents
Output control circuit, controller and air conditioner Download PDFInfo
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- CN216561500U CN216561500U CN202122655402.3U CN202122655402U CN216561500U CN 216561500 U CN216561500 U CN 216561500U CN 202122655402 U CN202122655402 U CN 202122655402U CN 216561500 U CN216561500 U CN 216561500U
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Abstract
The application provides an output control circuit, controller and air conditioner, the circuit includes: a signal input terminal; the first input end of the first amplification module is connected with the signal input end; the first input end of the first power module is connected with the output end of the first amplification module, and the second input end of the first power module is connected with a first direct-current voltage source; the first end of the first resistor is connected with the output end of the first power module; a first input end of the second amplification module is connected with a first end of the first resistor, and a second input end of the second amplification module is connected with a second end of the first resistor; the switch module is respectively connected with the second end of the first resistor, the output end of the second amplification module and the second input end of the first amplification module; the signal output end is connected with the second end of the first resistor and used for outputting various output signals, the intelligent and remote configuration can be further realized through software control, the switching of the output signal function of the controller can be realized, and the universality and the safety and reliability of the output control circuit can be enhanced.
Description
Technical Field
The application relates to the technical field of electronics, in particular to an output control circuit, a controller and an air conditioner.
Background
With the rapid development of industrial automation, Programmable Logic Controllers (PLC) and Direct Digital Control (DDC) controllers are increasingly applied to various fields such as industry, traffic, buildings and the like, and with the intelligent upgrade of controllers, the functional requirements on the output Control circuit of the Controller are also higher and higher, for example, the functions of the output Control circuit are switched as required to realize various signal outputs such as Digital quantity output and analog quantity output.
Therefore, how to enhance the versatility and safety and reliability of the output control circuit has become a problem to be solved.
SUMMERY OF THE UTILITY MODEL
The present application is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, a first objective of the present application is to provide an output control circuit, so as to be controllable by software, further implement intelligentization and remote configuration, implement switching of output signal functions of a controller, and enhance the universality and safety reliability of the output control circuit.
A second object of the present application is to propose a controller.
A third object of the present application is to provide an air conditioner.
To achieve the above object, a first aspect of the present application provides an output control circuit, including: a signal input terminal for inputting a voltage input signal; a first amplifying module, a first input end of which is connected with the signal input end; a first end of the first power module is connected with an output end of the first amplification module, and a second end of the first power module is connected with a first direct-current voltage source; a first end of the first resistor is connected with a third end of the first power module, and a second end of the first resistor is connected with the signal output end; a first input end of the second amplification module is connected with a first end of the first resistor, and a second input end of the second amplification module is connected with a second end of the first resistor; the switch module is respectively connected with the second end of the first resistor, the output end of the second amplification module and the second input end of the first amplification module, and is used for switching on the connection between the second end of the first resistor and the second input end of the first amplification module and the connection between the output end of the second amplification module and the second input end of the first amplification module; and the signal output end is used for outputting a first voltage output signal of digital quantity, a second voltage output signal of analog quantity and a current output signal of analog quantity.
The application provides an output control circuit, which comprises a signal output end, a signal input end, a first amplification module, a first power module, a first resistor, a second amplification module and a switch module, wherein a voltage input signal is input through the signal input end, the first input end of the first amplification module is connected with the signal input end, the first end of the first power module is connected with the output end of the first amplification module, the second end of the first power module is connected with a first direct-current voltage source, the first end of the first resistor is connected with the third end of the first power module, the second end of the first resistor is connected with the signal output end, the first input end of the second amplification module is connected with the first end of the first resistor, the second input end of the second amplification module is connected with the second end of the first resistor, the output end of the second amplification module is connected with the second end of the first resistor, the second input end of the second amplification module and the second input end of the first amplification module respectively, the switch module is used for switching on connection between the second end of the first resistor and the second input end of the first amplification module and connection between the output end of the second amplification module and the second input end of the first amplification module, and outputs a first voltage output signal of digital quantity, a second voltage output signal of analog quantity and a current output signal of analog quantity through the signal output end. Therefore, the circuit can be controlled by software, the intellectualization and the remote configuration are further realized, the switching of the output signal function of the controller is realized, and the universality and the safety and the reliability of the output control circuit are enhanced.
In addition, the output control circuit provided in the first aspect of the present application may further have the following additional technical features:
specifically, the first amplification module includes: a non-inverting input of the first operational amplifier is connected to the signal input, and an output of the first operational amplifier is connected to a first end of the first power module; a first end of the first capacitor is connected with the output end of the first operational amplifier, and a second end of the first capacitor is connected with the inverting input end of the first operational amplifier; and a first end of the second resistor is connected with the inverting input end of the first operational amplifier, and a second end of the second resistor is connected with the switch module.
Further, the output control circuit further includes: and the second end of the first power module is connected with the first direct current power supply through the overcurrent protection module.
Specifically, the overcurrent protection module includes: a voltage regulator or current limiter, a first end of the voltage regulator or current limiter being connected to the first direct current voltage source, a second end of the voltage regulator or current limiter being connected to a second end of the first power module; and the second end of the voltage stabilizer or the current limiter is connected with the third end of the voltage stabilizer or the current limiter through the third resistor.
Specifically, the second amplification module includes: a fourth resistor; a fifth resistor; the non-inverting input end of the second operational amplifier is connected with the first end of the first resistor through the fourth resistor, the inverting input end of the second operational amplifier is connected with the second end of the first resistor through the fifth resistor, and the output end of the second operational amplifier is connected with the switch module; a first end of the sixth resistor is grounded, and a second end of the sixth resistor is connected with a non-inverting input end of the second operational amplifier; a first end of the seventh resistor is connected with the output end of the second operational amplifier, and a second end of the seventh resistor is connected with the inverting input end of the second operational amplifier; and a first end of the second capacitor is connected with the output end of the second operational amplifier, and a second end of the second capacitor is connected with the inverting input end of the second operational amplifier.
Specifically, the switch module includes: the first switch unit is respectively connected with the second end of the first resistor and the second input end of the first amplification module; the second switch unit is respectively connected with the output end of the second amplification module and the second input end of the first amplification module; the control unit is respectively connected with the first switch unit and the second switch unit, and is used for controlling the first switch unit to be connected or disconnected between the second end of the first resistor and the second input end of the first amplification module according to an input control signal and controlling the second switch unit to be connected or disconnected between the output end of the second amplification module and the second input end of the first amplification module.
Specifically, the first switching unit includes: the input end of the first solid-state relay is connected with the second end of the first resistor, the output end of the first solid-state relay is connected with the second input end of the first amplification module, the input control end of the first solid-state relay is connected with the control unit, and the output control end of the first solid-state relay is grounded.
Specifically, the second switching unit includes: the input end of the second solid-state relay is connected with the output end of the second amplification module, the output end of the second solid-state relay is connected with the second input end of the first amplification module, the input control end of the second solid-state relay is connected with the control unit, and the output control end of the second solid-state relay is grounded.
Specifically, the control unit includes: a control signal input terminal for inputting the control signal; a control end of the first transistor is connected with the control signal input end, a first end of the first transistor is connected with the first switch unit, and a second end of the first transistor is grounded; a first end of the eighth resistor is connected with the second direct-current voltage source, and a second end of the eighth resistor is connected with the first end of the first transistor; and the control end of the second transistor is connected with the control signal input end, the first end of the second transistor is connected with a third direct current voltage source, and the second end of the second transistor is connected with the second switch unit.
Further, the output control circuit further includes: and the anode of the diode is grounded, and the cathode of the diode is connected with the signal output end.
Further, the output control circuit further includes: and the first input end of the first amplification module is connected with the signal input end through the filtering module.
Further, the output control circuit further includes: a first end of the second power module is connected with the output end of the first amplification module, and a second end of the second power module is connected with the second end of the first power module; a first end of the ninth resistor is connected with the third end of the second power module, and a second end of the ninth resistor is connected with the signal output end; the second amplification module further comprises: a tenth resistor, a first end of the tenth resistor being connected to a first end of the ninth resistor, and a second end of the tenth resistor being connected to a non-inverting input of the second operational amplifier.
To achieve the above object, a second aspect of the present application provides a controller, comprising: an output control circuit as claimed in an embodiment of the first aspect of the present application.
The controller can be controlled through software, further achieves intelligentization and remote configuration, achieves switching of the output signal function of the controller, and enhances universality and safety and reliability of an output control circuit.
To achieve the above object, a third aspect of the present application provides an air conditioner including a controller according to an embodiment of the second aspect of the present application.
The air conditioner can be controlled through software, further achieves intelligentization and remote configuration, achieves switching of the output signal function of the controller, and enhances universality and safety and reliability of the output control circuit.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of an output control circuit according to one embodiment of the present application;
FIG. 2 is a schematic diagram of an over-current protection module of an output control circuit according to one embodiment of the present application;
FIG. 3 is a schematic diagram of a first amplification block of an output control circuit according to one embodiment of the present application;
FIG. 4 is a schematic diagram of a second amplification block of an output control circuit according to one embodiment of the present application;
FIG. 5 is a schematic diagram of a switch module of an output control circuit according to one embodiment of the present application;
FIG. 6 is a schematic diagram of a control unit of an output control circuit according to one embodiment of the present application;
FIG. 7 is a simplified circuit diagram of a voltage output mode of an output control circuit according to one embodiment of the present application;
FIG. 8 is a simplified circuit diagram of a current output mode of an output control circuit according to one embodiment of the present application;
FIG. 9 is a schematic diagram of an overall structure of an output control circuit according to an embodiment of the present application;
FIG. 10 is a schematic diagram of the overall structure of an output control circuit according to another embodiment of the present application;
FIG. 11 is a schematic diagram of a controller according to one embodiment of the present application;
fig. 12 is a schematic diagram of an air conditioner according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
The output control circuit, the controller and the air conditioner according to the embodiments of the present application will be described with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of an output control circuit according to an embodiment of the present application.
As shown in fig. 1, the output control circuit 1 according to the embodiment of the present application may specifically include: the signal amplifying circuit comprises a signal input end in, a signal output end out, a first amplifying module 10, a first resistor R1, a second amplifying module 20, a switch module 30 and a first power module 40.
The signal input terminal in is used for inputting a voltage input signal, such as a voltage input signal of 0-10V analog quantity, or a voltage input signal of 12V digital quantity. The first amplification module 10 comprises a first input end, a second input end and an output end, the first input end of the first amplification module 10 is connected with the signal input end in, the second input end is connected with the switch module 30, and the output end is connected with the first end of the first power module 40; the second terminal of the first power module 40 is connected to a first dc power supply VDD1 (for example, a 12V-24V dc power supply is used), the third terminal of the first power module 40 is connected to the first terminal of the first resistor R1, the second terminal of the first resistor R1 is connected to the signal output terminal out and the switch module 30, and the first amplification module 10 can be used to amplify a voltage input signal, for example, when the voltage input signal is lower than 10V, a voltage signal of 10V can be output to the first terminal of the first power module 40 through the first amplification module 10. The second amplifying module 20 includes a first input terminal, a second input terminal and an output terminal, the first input terminal of the second amplifying module 20 is connected to the first terminal of the first resistor R1, the second input terminal of the second amplifying module 20 is connected to the second terminal of the first resistor R1, and the output terminal of the second amplifying module 20 is connected to the switch module 30. The switch module 30 is used to switch on the connection between the second terminal of the first resistor R1 and the second input terminal of the first amplification module 10, and the connection between the output terminal of the second amplification module 20 and the second input terminal of the first amplification module 10. The signal output terminal out is used for outputting a first voltage output signal of a digital quantity, a second voltage output signal of an analog quantity, and a current output signal of an analog quantity. The first voltage output signal of the digital quantity can be a voltage output signal of 12V, the second voltage output signal of the analog quantity can be a voltage output signal of 0-10V, and the current output signal of the analog quantity can be a current output signal of 0-20 mA.
For example, when it is required to output a first voltage output signal of an analog quantity, such as a voltage output signal of 0 to 10V, through the signal output terminal out, the voltage input signal input by the control signal input terminal in is a voltage input signal of an analog quantity of 0 to 10V, the connection between the second terminal of the first resistor R1 and the second input terminal of the first amplification module 10 is connected, and the connection between the output terminal of the second amplification module 20 and the second input terminal of the first amplification module 10 is disconnected, so that the first amplification module 20 and the first power module 40 form an emitter follower circuit, and thus the first voltage output signal of an analog quantity, such as a voltage output signal of 0 to 10V, can be output through the signal output terminal out.
When a digital second voltage output signal, such as a 12V voltage output signal, needs to be output through the signal output terminal out, the voltage input signal input by the control signal input terminal in is a 12V digital voltage input signal, the connection between the second terminal of the first resistor R1 and the second input terminal of the first amplification module 10 is also switched on, the connection between the output terminal of the second amplification module 20 and the second input terminal of the first amplification module 10 is also switched off, and the first amplification module 20 and the first power module 40 form an emitter follower circuit, so that the digital second voltage output signal, such as the 12V voltage output signal, can be output through the signal output terminal out.
When an analog current output signal, such as a 0-20mA current output signal, needs to be output through the signal output terminal out, the voltage input signal input by the signal input terminal in is a 0-10V analog voltage input signal, the connection between the second terminal of the first resistor R1 and the second input terminal of the first amplification module 10 is disconnected, and the connection between the output terminal of the second amplification module 20 and the second input terminal of the first amplification module 10 is connected, so that the analog current output signal, such as a 0-20mA current output signal, can be output through the signal output terminal out.
Therefore, the circuit can be controlled through software, the intelligentization and the remote configuration are further realized, the switching of the output signal function of the controller is realized, and the universality, the safety and the reliability of the output control circuit are enhanced.
The lower output control circuit is specifically described below with reference to fig. 2 to 9.
It should be noted that the first power module 40 may be formed by a transistor or a MOS transistor, and the present application is not limited thereto, as shown in fig. 7-9, for convenience of description, in the embodiment of the present application, a first transistor Q1 is taken as an example of the first power module 40, where a base of the first transistor Q1 is taken as a first end of the first power module 40, a collector of the first transistor Q1 is taken as a second end of the first power module 40, and an emitter of the first transistor Q1 is taken as a third end of the first power module 40.
As shown in fig. 2 and 9, the output control circuit 1 may further include: the overcurrent protection module 50 and the first triode Q1 are connected with the first direct current power supply VDD1 through the overcurrent protection module 50, so that when the signal output end out is short-circuited due to misoperation of a user, overcurrent protection is performed on the first triode Q1.
As a possible implementation, as shown in fig. 2, the over-current protection module 50 may include a regulator or current limiter IC1 and a third resistor R3, where the regulator or current limiter IC1 is a three-terminal regulator or current limiter, a first terminal of the regulator or current limiter IC1 is connected to the first dc voltage source VDD1, a second terminal of the regulator or current limiter IC1 is connected to the collector of the first transistor Q1, and a second terminal of the regulator or current limiter IC1 is connected to the third terminal of the regulator or current limiter IC1 through the third resistor R3.
As shown in fig. 3 and 9, the first amplification module 10 may include: a first operational amplifier A1, a first capacitor C1, and a second resistor R2. A non-inverting input terminal of the first operational amplifier a1 is connected to the signal input terminal in as a first input terminal of the first amplification module 10, an output terminal of the first operational amplifier a1 is connected to a base of the first transistor Q1 as an output terminal of the first amplification module 10, an inverting input terminal of the first operational amplifier a1 is connected to a first terminal of the second resistor R2, and a second terminal of the second resistor R2 is connected to the switch module 30 as a second input terminal of the first amplification module 10. A first terminal of the first capacitor C1 is connected to the output terminal of the first operational amplifier a1, and a second terminal of the first capacitor C2 is connected to the inverting input terminal of the first operational amplifier a 1.
As shown in fig. 4 and 9, the second amplification module 20 may include: a fourth resistor R4, a fifth resistor R5, a second operational amplifier A2, a sixth resistor R6, a seventh resistor R7 and a second capacitor C2. A non-inverting input terminal of the second operational amplifier a1 is connected to a first terminal of the fourth resistor R4, a second terminal of the fourth resistor R4 is connected to a first terminal of the first resistor R1 as a first input terminal of the second amplification module 20, an inverting input terminal of the second operational amplifier a2 is connected to a first terminal of the fifth resistor R5, a second terminal of the fifth resistor R5 is connected to a second terminal of the first resistor R1 as a second input terminal of the second amplification module 20, and an output terminal of the second operational amplifier a2 is connected to the switch module 30 as an output terminal of the second amplification module 20. A first end of the sixth resistor R6 is connected to the ground GND, and a second end of the sixth resistor R6 is connected to the non-inverting input terminal of the second operational amplifier a 2. A first terminal of the seventh resistor R7 is connected to the output terminal of the second operational amplifier a2, and a second terminal of the seventh resistor R7 is connected to the inverting input terminal of the second operational amplifier a 2. A first terminal of the second capacitor C2 is connected to the output terminal of the second operational amplifier a2, and a second terminal of the second capacitor C2 is connected to the inverting input terminal of the second operational amplifier a 2.
As shown in fig. 5 and 9, the switch module 30 may include: a first switching unit 301, a second switching unit 302, and a control unit 303. The second end of the first resistor R1 is connected to the switch module 30, and may be specifically connected to the first switch unit 301 in the switch module 30. The second input terminal of the first amplifying module 10 is connected to the switch module 30, and specifically, may be connected to the first switch unit 301 and the second switch unit 302 in the switch module 30. The output end of the second amplifying module 20 is connected to the switch module 30, and may be specifically connected to the second switch unit 302 in the switch module 30. The control unit 303 is connected to the first switching unit 301 and the second switching unit 302, respectively, and the control unit 303 controls the first switching unit 301 to turn on or off the connection between the second terminal of the first resistor R1 and the second input terminal of the first amplification module 10 and controls the second switching unit 302 to turn on or off the connection between the output terminal of the second amplification module 20 and the second input terminal of the first amplification module 10 according to the input control signal.
In embodiments of the present application, the first switching unit 301 may include, but is not limited to, a first solid state relay IC2, etc., wherein the first solid state relay IC2 includes an input, an output, a control input, and a control output. As shown in fig. 5 and 9, the input terminal of the first solid-state relay IC2 in the first switch unit 301 is connected to the second terminal of the first resistor R5, the output terminal of the first solid-state relay IC2 is connected to the second input terminal of the first amplification module 10, the input control terminal of the first solid-state relay IC2 is connected to the control unit 303, and the output control terminal of the first solid-state relay IC2 is connected to the ground GND.
In embodiments of the present application, the second switching unit 302 may include, but is not limited to, a second solid state relay IC3, etc., wherein the second solid state relay IC3 includes an input, an output, a control input, and a control output. As shown in fig. 5 and 9, the input terminal of the second solid-state relay IC3 in the second switch unit 302 is connected to the output terminal of the second amplification block 20, the output terminal of the second solid-state relay IC3 is connected to the second input terminal of the first amplification block 10, the input control terminal of the second solid-state relay IC3 is connected to the control unit 303, and the output control terminal of the second solid-state relay IC3 is grounded to GND or may be grounded to GND through the eleventh resistor R11.
It should be noted that the first switch unit 301 and the second switch unit 302 are not limited to solid-state relays, and may also use dial switches and jumpers, or electromagnetic relays, etc., and input ports of the first switch unit 301 and the second switch unit 302 are controlled by an IO pin of a single chip, and the first switch unit 301 and the second switch unit 302 are controlled by software.
As shown in fig. 6 and 9, the control unit 303 may include: the circuit comprises a control signal input end CNTL-in, a first transistor Q2, an eighth resistor R8 and a second transistor Q3. The control signal is generated by the single chip microcomputer, and the control signal is input to the control unit 303 from the input terminal CNTL-in. A control terminal of the first transistor Q2 is connected to the control signal input terminal CNTL-in, a first terminal of the first transistor Q2 is connected to the first switch unit 301, and specifically, may be connected to an input control terminal of the first solid-state relay IC2, and a second control terminal of the first transistor Q2 is grounded GND. A first terminal of the eighth resistor R8 is connected to the second dc voltage source VDD2, and a second terminal of the eighth resistor R8 is connected to the first terminal of the first transistor Q2. A control terminal of the second transistor Q3 is connected to the control signal input terminal CNTL-in, a first terminal of the second transistor Q3 is connected to the third dc voltage source VDD3, and a second terminal of the second transistor Q3 is connected to the second switch unit 302, and may be specifically connected to an input control terminal of the second solid-state relay IC 3.
In some embodiments, the single chip microcomputer may output a control signal to the control signal input terminal CNTL-in to control the turning-off or turning-on of the first transistor Q2 and the second transistor Q3 in the control module 303, so as to control the first switching unit 301 and the second switching unit 302, that is: the first switching unit 301 is controlled to turn on or off the connection between the second terminal of the first resistor R1 and the second input terminal of the first amplification module 10, and the second switching unit 302 is controlled to turn on or off the connection between the output terminal of the second amplification module 20 and the second input terminal of the first amplification module 10.
Therefore, the switching of the function of the output signal of the control circuit can be realized by the control signal output by the software configuration singlechip, and the intelligent and remote configuration is further realized.
As shown in fig. 10, the output control circuit 1 may further have a diode D1 connected to the signal output terminal out. The anode of the diode D1 is grounded GND, the cathode is connected to the signal output terminal out, and the diode D1 is configured to absorb a spike voltage generated when the first solid-state relay IC2 or the second solid-state relay IC3 is turned off.
As shown in fig. 7-10, the output control circuit 1 may further add a filtering module 60 between the first amplifying module 10 and the signal input terminal in, where a first input terminal of the first amplifying module 10 is connected to the signal input terminal in through the filtering module 60 to filter the analog voltage input signal, and input the filtered analog voltage input signal to the first input terminal of the first amplifying module 10, where the filtering module 60 may include a twelfth resistor R12 and a capacitor C3.
The output control circuit according to the embodiment of the present application controls the first switch unit 301 (specifically, the first solid state relay IC2) in the switch module 30 to switch on or off the connection between the second end of the first resistor R1 and the second input end of the first amplification module 10, and controls the second switch unit 301 (specifically, the second solid state relay IC3) to switch on or off the connection between the output end of the second amplification module 20 and the second input end of the first amplification module 10, according to the control signal of the control unit 303.
When the control signal is a low-level signal, the first transistor Q2 and the second transistor Q3 in the control unit 303 are both turned off, so that the first switch unit 301 (specifically, the first solid-state relay IC2) is turned on, and the second switch unit 302 (specifically, the first solid-state relay IC3) is turned off, so that the second end of the first resistor R1 and the second input end of the first amplification module 10 are turned on, and the output end of the second amplification module 20 and the second input end of the first amplification module 10 are turned off, as shown in fig. 7, and at this time, the output control circuit is in the voltage feedback mode.
For example, when it is required to output a first voltage output signal of an analog quantity, such as a voltage output signal of 0-10V, through the signal output terminal out, the signal input terminal CNTL-in is controlled to input a low level signal, and the voltage input signal input by the signal input terminal in is controlled to be a voltage input signal of an analog quantity of 0-10V, so that the second terminal of the first resistor R1 is connected to the second input terminal of the first amplification module 10, and the output terminal of the second amplification module 20 is disconnected from the second input terminal of the first amplification module 10, so that the first amplification module 20 and the first transistor Q1 form an emitter follower circuit, and through a voltage feedback function, the first voltage output signal of an analog quantity, such as a voltage output signal of 0-10V, can be output through the signal output terminal out.
For another example, when a digital second voltage output signal, such as a 12V voltage output signal, needs to be output through the signal output terminal out, the control signal input terminal CNTL-in inputs a low level signal, the voltage input signal input by the control signal input terminal in is a 12V digital voltage input signal, so that the second terminal of the first resistor R1 is connected to the second input terminal of the first amplification module 10, and the output terminal of the second amplification module 20 is disconnected from the second input terminal of the first amplification module 10, and the first amplification module 20 and the first transistor Q1 form an emitter follower circuit, so that the digital second voltage output signal, such as a 12V voltage output signal, can be output through the signal output terminal out through the voltage feedback function.
When the control signal is a high level signal, the first transistor Q2 and the second transistor Q3 in the control unit 303 are both turned on, so that the first switch unit 301 (specifically, the first solid state relay IC2) is turned off, and the second switch unit 302 (specifically, the first solid state relay IC3) is turned on, so that the connection between the second end of the first resistor R1 and the second input end of the first amplification module 10 is turned off, and the connection between the output end of the second amplification module 20 and the second input end of the first amplification module 10 is turned on, as shown in fig. 8, at this time, the circuit is in a current feedback mode.
For example, when an analog current output signal, such as a 0-20mA current output signal, needs to be output through the signal output terminal out, the signal input terminal CNTL-in is controlled to input a high level signal, and the voltage input signal input by the signal input terminal in is controlled to be a 0-10V analog voltage input signal, so that the second terminal of the first resistor R1 is disconnected from the second input terminal of the first amplification module 10, and the output terminal of the second amplification module 20 is connected to the second input terminal of the first amplification module 10, at this time, in the current feedback mode, the voltage signal is taken from the two terminals of the first resistor R1 and differentially amplified by the second amplification module 20 (specifically, the second operational amplifier IC3), and the amplified voltage needs to be consistent with the input voltage corresponding to the voltage input signal. For example, if the first resistor R1, the fourth resistor R4, the fifth resistor R5, and the seventh resistor are all 10 Ω, the current to be output through the signal output terminal out is 20mA, and the input voltage U ═ R1 ═ I ═ Af ═ 10 ═ 0.02 ═ 100/2V ═ 10V, the amplification factor of the second amplification module 20 is 50 times. If the first resistor R1, the fourth resistor R4, the fifth resistor R5 and the seventh resistor are all 5 Ω, the amplification factor of the second amplification module 20 is 100 times.
On the basis of the above embodiment, when the driving current of the single transistor (the first transistor Q1) does not meet the requirement, a parallel connection mode of 2 transistors can be used. As shown in fig. 10, the output control circuit according to the embodiment of the present application may further include: a second power module 70 and a ninth resistor R9. In this embodiment, the second transistor Q4 is used as the second power module 70 to describe the output control circuit, a base of the second transistor Q4 is used as a first end of the second power module 70, a collector of the second transistor Q4 is used as a second end of the second power module 70, and an emitter of the second transistor Q4 is used as a third end of the second power module 70. A control terminal (base) of the second transistor Q4 is connected to the output terminal of the first amplification module 10, and a first terminal (collector) of the second transistor Q4 is connected to a first terminal (collector) of the first transistor Q1. A first terminal of the ninth resistor R9 is connected to the second terminal (emitter) of the second transistor Q4, and a second terminal of the ninth resistor R9 is connected to the signal output terminal out.
Correspondingly, the second amplifying module 20 may further include: a tenth resistor R10. A first end of the tenth resistor R10 is connected to a first end of the ninth resistor R9, and a second end of the tenth resistor R10 is connected to the non-inverting input of the second operational amplifier a 2.
It should be noted that the operation principle of the circuit shown in fig. 10 is as that of the circuit shown in fig. 9, and detailed description thereof is omitted here.
To sum up, the output control circuit provided in the embodiment of the present application includes a signal output end, a signal input end, a first amplification module, a first power module, a first resistor, a second amplification module, and a switch module, wherein a voltage input signal is input through the signal input end, the first input end of the first amplification module is connected to the signal input end, the first end of the first power module is connected to the output end of the first amplification module, the second end of the first power module is connected to a first dc voltage source, the first end of the first resistor is connected to the third end of the first power module, the second end of the first resistor is connected to the signal output end, the first input end of the second amplification module is connected to the first end of the first resistor, the second input end of the second amplification module is connected to the second end of the first resistor, and the switch module is respectively connected to the second end of the first resistor, the output end of the second amplification module, and the second input end of the first amplification module, the switch module is used for switching on connection between the second end of the first resistor and the second input end of the first amplification module and connection between the output end of the second amplification module and the second input end of the first amplification module, and outputs a first voltage output signal of digital quantity, a second voltage output signal of analog quantity and a current output signal of analog quantity through the signal output end. Therefore, the circuit can be controlled by software, the intellectualization and the remote configuration are further realized, the switching of the output signal function of the controller is realized, and the universality and the safety and the reliability of the output control circuit are enhanced.
In order to implement the above embodiments, the embodiments of the present application further provide a controller.
As shown in fig. 11, the controller 110 according to the embodiment of the present application may specifically include: the output control circuit 1 shown in any of the above embodiments.
The controller of the embodiment of the application can be controlled through software, further realizes intellectualization and remote configuration, realizes the switching of the output signal function of the controller, and enhances the universality and the safety and reliability of the output control circuit.
In order to implement the above embodiments, an air conditioner 120 is further provided in the embodiments of the present application.
As shown in fig. 12, the air conditioner 120 according to the embodiment of the present application may specifically include: the controller 110 shown in fig. 11.
The air conditioner of this application embodiment can be through software steerable, further realizes intellectuality, and remote configuration realizes the switching of controller output signal function, strengthens output control circuit's commonality and fail safe nature.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (14)
1. An output control circuit, comprising:
a signal input terminal for inputting a voltage input signal;
a first amplifying module, a first input end of which is connected with the signal input end;
a first end of the first power module is connected with the output end of the first amplification module, and a second end of the first power module is connected with a first direct-current voltage source;
a first end of the first resistor is connected with a third end of the first power module;
a first input end of the second amplification module is connected with a first end of the first resistor, and a second input end of the second amplification module is connected with a second end of the first resistor;
the switch module is respectively connected with the second end of the first resistor, the output end of the second amplification module and the second input end of the first amplification module, and is used for switching on the connection between the second end of the first resistor and the second input end of the first amplification module and the connection between the output end of the second amplification module and the second input end of the first amplification module;
and the signal output end is connected with the second end of the first resistor and is used for outputting a first voltage output signal of digital quantity, a second voltage output signal of analog quantity and a current output signal of analog quantity.
2. The output control circuit of claim 1, wherein the first amplification module comprises:
a non-inverting input of the first operational amplifier is connected to the signal input, and an output of the first operational amplifier is connected to a first end of the first power module;
a first end of the first capacitor is connected with the output end of the first operational amplifier, and a second end of the first capacitor is connected with the inverting input end of the first operational amplifier;
and a first end of the second resistor is connected with the inverting input end of the first operational amplifier, and a second end of the second resistor is connected with the switch module.
3. The output control circuit of claim 1, further comprising:
and the second end of the first power module is connected with the first direct-current voltage source through the overcurrent protection module.
4. The output control circuit of claim 3, wherein the over-current protection module comprises:
a voltage regulator or current limiter, a first end of the voltage regulator or current limiter being connected to the first direct current voltage source, a second end of the voltage regulator or current limiter being connected to a second end of the first power module;
and the second end of the voltage stabilizer or the current limiter is connected with the third end of the voltage stabilizer or the current limiter through the third resistor.
5. The output control circuit of claim 1, wherein the second amplification module comprises:
a fourth resistor;
a fifth resistor;
the non-inverting input end of the second operational amplifier is connected with the first end of the first resistor through the fourth resistor, the inverting input end of the second operational amplifier is connected with the second end of the first resistor through the fifth resistor, and the output end of the second operational amplifier is connected with the switch module;
a first end of the sixth resistor is grounded, and a second end of the sixth resistor is connected with a non-inverting input end of the second operational amplifier;
a first end of the seventh resistor is connected with the output end of the second operational amplifier, and a second end of the seventh resistor is connected with the inverting input end of the second operational amplifier;
and a first end of the second capacitor is connected with the output end of the second operational amplifier, and a second end of the second capacitor is connected with the inverting input end of the second operational amplifier.
6. The output control circuit of claim 1, wherein the switching module comprises:
the first switch unit is respectively connected with the second end of the first resistor and the second input end of the first amplification module;
the second switch unit is respectively connected with the output end of the second amplification module and the second input end of the first amplification module;
the control unit is respectively connected with the first switch unit and the second switch unit, and the control unit is used for controlling the first switch unit to be connected or disconnected between the second end of the first resistor and the second input end of the first amplification module or controlling the second switch unit to be connected or disconnected between the output end of the second amplification module and the second input end of the first amplification module according to an input control signal.
7. The output control circuit according to claim 6, wherein the first switching unit includes:
the input end of the first solid-state relay is connected with the second end of the first resistor, the output end of the first solid-state relay is connected with the second input end of the first amplification module, the input control end of the first solid-state relay is connected with the control unit, and the output control end of the first solid-state relay is grounded.
8. The output control circuit according to claim 6, wherein the second switching unit includes:
the input end of the second solid-state relay is connected with the output end of the second amplification module, the output end of the second solid-state relay is connected with the second input end of the first amplification module, the input control end of the second solid-state relay is connected with the control unit, and the output control end of the second solid-state relay is grounded.
9. The output control circuit according to claim 6, wherein the control unit comprises:
a control signal input terminal for inputting the control signal;
a control end of the first transistor is connected with the control signal input end, a first end of the first transistor is connected with the first switch unit, and a second end of the first transistor is grounded;
a first end of the eighth resistor is connected with the second direct-current voltage source, and a second end of the eighth resistor is connected with the first end of the first transistor;
and the control end of the second transistor is connected with the control signal input end, the first end of the second transistor is connected with a third direct current voltage source, and the second end of the second transistor is connected with the second switch unit.
10. The output control circuit of claim 1, further comprising:
and the anode of the diode is grounded, and the cathode of the diode is connected with the signal output end.
11. The output control circuit of claim 1, further comprising:
and the first input end of the first amplification module is connected with the signal input end through the filtering module.
12. The output control circuit of claim 5, further comprising:
a first end of the second power module is connected with the output end of the first amplification module, and a second end of the second power module is connected with the second end of the first power module;
a first end of the ninth resistor is connected with a third end of the second power module, and a second end of the ninth resistor is connected with the signal output end;
the second amplification module further comprises:
a tenth resistor, a first end of the tenth resistor being connected to a first end of the ninth resistor, and a second end of the tenth resistor being connected to a non-inverting input of the second operational amplifier.
13. A controller, comprising: an output control circuit as claimed in any one of claims 1 to 12.
14. An air conditioner, comprising: the controller of claim 13.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122655402.3U CN216561500U (en) | 2021-11-01 | 2021-11-01 | Output control circuit, controller and air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122655402.3U CN216561500U (en) | 2021-11-01 | 2021-11-01 | Output control circuit, controller and air conditioner |
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| CN216561500U true CN216561500U (en) | 2022-05-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114137865A (en) * | 2021-11-01 | 2022-03-04 | 上海美控智慧建筑有限公司 | Output control circuit, controller and air conditioner |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114137865A (en) * | 2021-11-01 | 2022-03-04 | 上海美控智慧建筑有限公司 | Output control circuit, controller and air conditioner |
| WO2023071364A1 (en) * | 2021-11-01 | 2023-05-04 | 上海美控智慧建筑有限公司 | Output control circuit, controller, and air conditioner |
| CN114137865B (en) * | 2021-11-01 | 2024-03-19 | 上海美控智慧建筑有限公司 | Output control circuit, controller and air conditioner |
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