Control panel system

Abstract

The invention provides a control panel system. The control panel system comprises a switching circuit, a detection circuit, a control output circuit and a main control chip, the switching circuit comprises a first input end, a first output end and a second output end; the first input end is connected with a control signal output end of the main control chip; the first output end is connected with the detection circuit; the second output end is connected with the control output circuit; the main control chip is used for controlling the switching circuit to be connected with the detection circuit when a first control signal is output to the switching circuit, and controlling the switching circuit to be connected with the control output circuit when a second control signal is output to the switching circuit. According to the control panel system, the signal detection function of the signal detection circuit can be achieved, the output function of the output circuit can be controlled, the circuit setting cost is reduced, and meanwhile the circuit compatibility is improved.

Description

Technical Field

[0001] The present application relates to the field of electronic technology, and in particular to a control panel system. Background Art

[0002] For the indoor and outdoor units of the air-conditioning system, when the user inputs a control signal at the traditional wired controller, the input signal can be detected by the signal detection circuit in the main control board and the fan control board. After detecting the input signal, the main control board and the fan control board will drive their corresponding components. For example, the main control board will drive the compressor, valve assembly, auxiliary heating circuit, etc., thereby realizing functions such as cooling and heating.

[0003] Currently, a signal detection circuit needs to be separately provided in an air-conditioning system, and the design of the circuit is complicated. Therefore, a control panel system is urgently needed. Summary of the Invention

[0004] In view of the above problems, the present application provides a control board system, which does not require the signal detection circuit and the control output circuit to be set up separately, thereby reducing the circuit setting cost and improving the circuit compatibility.

[0005] The technical solutions provided in this application are as follows:

[0006] In one possible implementation, a control board system includes a switching circuit, a detection circuit, a control output circuit, and a main control chip;

[0007] The switching circuit includes: a first input terminal, a first output terminal, and a second output terminal;

[0008] The first input terminal is connected to the control signal output terminal of the main control chip;

[0009] The first output end is connected to the detection circuit;

[0010] The second output terminal is connected to the control output circuit;

[0011] The main control chip is used to control the switching circuit to connect with the detection circuit when outputting a first control signal to the switching circuit, and to control the switching circuit to connect with the control output circuit when outputting a second control signal to the switching circuit.

[0012] In one possible implementation, the detection circuit includes: a first diode, a first resistor, a second resistor, and a first insulated gate bipolar transistor;

[0013] The first port of the first diode is connected to the first output end;

[0014] The second end of the first diode is connected to the first end of the first resistor, the second end of the first resistor is connected to the first end of the second resistor, and the second end of the second resistor is connected to the base of the first insulated gate bipolar transistor;

[0015] The collector of the first insulated gate bipolar transistor is connected to the control input terminal of the micro-control unit;

[0016] The first insulated gate bipolar transistor is configured to be turned on or off according to the first control signal to control the input voltage of the micro-control unit.

[0017] In one possible implementation, the detection circuit is further configured to convert the first control signal into at least one of the following signals: a square wave signal of the micro-control unit, a low-level signal of the micro-control unit, or a high-level signal of the micro-control unit.

[0018] In one possible implementation, the detection circuit further includes a third resistor and a fourth resistor;

[0019] A first end of the third resistor is connected to the second resistor and the base of the first insulated gate bipolar transistor respectively, a second end of the third resistor is connected to the emitter of the first insulated gate bipolar transistor and a second end of the third resistor is grounded;

[0020] The first end of the fourth resistor is connected to the collector of the first insulated gate bipolar transistor and the control input end of the micro-control unit respectively.

[0021] In one possible implementation, the control output circuit is connected to an auxiliary heating circuit;

[0022] The control output circuit is used to output a target voltage value to the auxiliary heating circuit according to the second control signal.

[0023] In one possible implementation, the control signal output end of the main control chip is connected to the auxiliary heating circuit, the auxiliary heating circuit is connected to the first input end, and the control output circuit is used to output a target voltage value to the auxiliary heating circuit according to the second control signal, and the target voltage value is 24VAC.

[0024] In one possible implementation, the main control chip includes: a voltage input terminal, a fifth resistor, and a second insulated gate bipolar transistor;

[0025] The voltage input terminal is connected to the collector of the second insulated gate bipolar transistor;

[0026] The base of the second insulated gate bipolar transistor is connected to the first end of the fifth resistor; the second end of the fifth resistor is connected to the control signal output end of the main control chip;

[0027] The emitter of the second insulated gate bipolar transistor is grounded;

[0028] The control signal output terminal of the main control chip is used to output the first control signal or the second control signal according to the voltage input by the voltage input terminal.

[0029] In a possible implementation, the main control chip further includes: a sixth resistor;

[0030] The first end of the sixth resistor is connected to the first end of the fifth resistor and the base of the second insulated gate bipolar transistor respectively;

[0031] The second end of the sixth resistor is connected to the emitter of the second insulated gate bipolar transistor.

[0032] In one possible implementation, the switching circuit includes at least one of the following: a double-throw relay, an operational amplifier circuit, a triode, or a metal oxide semiconductor field effect transistor.

[0033] In one possible implementation, when the switching circuit includes a double-throw relay, an NC contact of the double-throw relay is connected to the detection circuit;

[0034] The NO contact of the double-throw relay is connected to the control output circuit.

[0035] In one possible implementation, the control panel system is an air conditioning control panel system.

[0036] It can be seen that this application has the following beneficial effects:

[0037] The present application provides a control board system, which includes a switching circuit, a detection circuit, a control output circuit and a main control chip; the switching circuit includes: a first input terminal, a first output terminal and a second output terminal; the first input terminal is connected to the control signal output terminal of the main control chip; the first output terminal is connected to the detection circuit; the second output terminal is connected to the control output circuit; the main control chip is used to control the switching circuit to connect to the detection circuit when outputting a first control signal to the switching circuit, and to control the switching circuit to connect to the control output circuit when outputting a second control signal to the switching circuit. In this way, on the basis of a control system, the function can be switched through the switching circuit, which can realize both the signal detection function of the signal detection circuit and the output function of the control output circuit, without the need to set up the signal detection circuit and the control output circuit separately, thereby reducing the circuit setting cost while improving the circuit compatibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0039] Figure 1 A schematic structural diagram of a control panel system provided in an embodiment of the present application;

[0040] Figure 2 A schematic diagram of the structure of a test circuit provided in an embodiment of the present application;

[0041] Figure 3 A schematic diagram of the connection structure of an auxiliary heating circuit provided in an embodiment of the present application;

[0042] Figure 4 A schematic diagram of the structure of a main control chip provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0044] To facilitate understanding and explanation of the technical solutions provided by the embodiments of the present application, the following will first explain the terms and technologies that may be involved in the embodiments of the present application:

[0045] Microcontroller Unit (MCU).

[0046] Metal-Oxide-Semiconductor Field-Effect Transistor (MOS).

[0047] The main difference between the NC terminal and the NO terminal of a relay lies in their default state and function in the circuit. NO terminal (Normally Open Contact): In the normal state when the relay is not energized, the NO terminal is disconnected. When the relay coil is energized, electromagnetic action causes the contacts to close, forming a circuit. Therefore, the NO terminal is usually used to indicate a contact that is disconnected under normal circumstances and is closed only when energized. NC terminal (Normally Closed Contact): In contrast to the NO terminal, the NC terminal is closed in the normal state when the relay is not energized. When the relay coil is energized, electromagnetic action causes the contacts to disconnect, forming a circuit break. Therefore, the NC terminal is usually used to indicate a contact that is closed under normal circumstances and is disconnected only when energized.

[0048] In the embodiment of the present application, taking the indoor and outdoor units of the air-conditioning system as an example, some control signals are usually defined, such as Y1, Y2, W, O, etc. When the user inputs signals such as Y1, Y2, W, O at the "traditional wired controller", the signal can be captured by the main control board, fan control board, etc. After capture, the main control board will drive the compressor, valve assembly, auxiliary heating circuit, thereby realizing functions such as cooling and heating. However, in the whole system of the "communication wired controller", the input command is obtained from the communication data. After receiving it, the main control board drives the compressor, valve assembly, and auxiliary heating circuit.

[0049] For example, in some complete systems, the W terminal is used as an input signal, which is then used to control auxiliary heating at other terminals. In other systems, the input signal is acquired through communication and then output at the W terminal, making W the output. Therefore, different complete systems require independent circuits or even independent control boards. In this case, two sets of boards must be developed, resulting in relatively high development and management costs. This also slows down market introduction.

[0050] An embodiment of the present application provides a PWM signal output protection circuit. The control board system does not need to separately set up the signal detection circuit and the control output circuit. On the basis of a control system, the functions are switched by switching the circuit, which can realize both the signal detection function of the signal detection circuit and the output function of the control output circuit, thereby reducing the circuit setting cost while improving the circuit compatibility.

[0051] In view of this, if Figure 1 As shown, an embodiment of the present application provides a control board system, which includes a switching circuit K, a main control chip A, a detection circuit B and a control output circuit C. The switching circuit K includes: a first input terminal K1, a first output terminal K2 and a second output terminal K3. The first input terminal K1 is connected to the control signal output terminal of the main control chip A, the first output terminal K2 is connected to the detection circuit B; the second output terminal K3 is connected to the control output circuit C.

[0052] When the main control chip A outputs a first control signal to the switching circuit K, the switching circuit K is controlled to connect to the detection circuit A. When the main control chip A outputs a second control signal to the switching circuit K, the switching circuit K is controlled to connect to the control output circuit C. It can be understood that when the main control chip A outputs the first control signal to the switching circuit K, the first input terminal K1 is connected to the first output terminal K2, and is now connected to the detection circuit B, so that the detection of the control signal can be achieved through the detection circuit B. When the main control chip A outputs the second control signal to the switching circuit K, the first input terminal K1 is connected to the second output terminal K3, and is now connected to the control output circuit C, so that the output of the control signal can be achieved through the control output circuit C.

[0053] It should be emphasized that the communication mode of the control panel system in this application is a half-duplex communication mode.

[0054] In one possible implementation, the control output circuit C may also be connected to an auxiliary heating circuit, and the control output circuit may output a target voltage value to the auxiliary heating circuit according to a second control signal.

[0055] In a possible implementation, the switching circuit K may be any one of a double-throw relay, an operational amplifier circuit, a transistor, or a metal oxide semiconductor field effect transistor, which is not specifically limited here.

[0056] In one possible implementation, when the switching circuit K is a double-throw relay, the NC contact of the double-throw relay is connected to the detection circuit, and the NO contact of the double-throw relay is connected to the control output circuit. It should be noted that the double-throw relay can be a single-pole double-throw relay, a double-pole double-throw relay, etc., and is not specifically limited here.

[0057] like Figure 2 As shown, in one possible implementation, the specific structure of the detection circuit B includes: a first diode D, a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4, a first insulated gate bipolar transistor Q1 and a micro control unit MCU.

[0058] A first port of the first diode D is connected to the first output terminal K2, a second port of the first diode D is connected to a first end of the first resistor R1, a second end of the first resistor R1 is connected to a first end of the second resistor R2, and a second end of the second resistor R2 is connected to the base of the first insulated gate bipolar transistor Q1.

[0059] The collector of the first insulated gate bipolar transistor Q1 is connected to the control input terminal of the micro-control unit MCU. The first end of the third resistor R3 is connected to the second resistor R2, the first end of the third resistor R3 is connected to the base of the first insulated gate bipolar transistor Q1, the second end of the third resistor R3 is connected to the emitter Q1 of the first insulated gate bipolar transistor, and the second end of the third resistor R3 is grounded. The first end of the fourth resistor R4 is connected to the collector of the first insulated gate bipolar transistor Q1, and the first end of the fourth resistor R4 is connected to the control input terminal of the micro-control unit MCU. Furthermore, the second end of the fourth resistor R4 can be connected to a power supply V1, which can be a 3.3V power supply, etc., which are not specifically limited here.

[0060] The first insulated gate bipolar transistor Q1 can be turned on or off according to the first control signal to control the input voltage of the micro control unit MCU.

[0061] The following describes the detection circuit and control output circuit in the control board system of the present application, taking the control signal W as an example:

[0062] refer to Figure 1 and Figure 2 In one possible implementation scenario, the main control chip outputs a first control signal to the switching circuit K, and the first input terminal K1 is connected and turned on with the first output terminal K2. At this time, it is connected to the detection circuit B. The control signal W passes through the diode D to control the insulated gate bipolar transistor Q1 to turn on or off, thereby controlling the input voltage of the micro-control unit MCU. When the entire system needs to use the W terminal as an external input function, "W detection" can be implemented.

[0063] In another possible implementation, the main control chip outputs a second control signal to the switching circuit K, and the first input terminal K1 is connected and conductive to the second output terminal K3. At this time, the control output circuit can be connected to the auxiliary heating circuit, and the control output circuit can output a target voltage value to the auxiliary heating circuit according to the second control signal. Figure 3 As shown, the auxiliary heating circuit is connected to the first input circuit K1, and the second output terminal K3 is connected to a 24VAC power supply. In other words, after the first input terminal K1 and the second output terminal K3 are connected and conductive, an auxiliary heating circuit D is externally connected between the main control chip A and the first input terminal K1. At this time, the control output circuit C can output a target voltage value to the auxiliary heating circuit D, which can be 24VAC.

[0064] like Figure 4 As shown, in a possible implementation, the main control chip A may include: a voltage input terminal V2, a fifth resistor R5, a sixth resistor R6 and a second insulated gate bipolar transistor Q2.

[0065] The voltage input terminal V2 is connected to the collector of the second insulated gate bipolar transistor Q2, the base of the second insulated gate bipolar transistor Q2 is connected to the first end of the fifth resistor R5, the second end of the fifth resistor R5 is connected to the control signal output terminal OUT of the main control chip, the first end of the sixth resistor R6 is connected to the first end of the fifth resistor R5, the first end of the sixth resistor R6 is connected to the base of the second insulated gate bipolar transistor Q2, and the second end of the sixth resistor R6 is connected to the emitter of the second insulated gate bipolar transistor Q2. The emitter of the second insulated gate bipolar transistor Q2 is grounded.

[0066] The control signal output terminal OUT of the main control chip A can output a first control signal or a second control signal according to the voltage inputted by the voltage input terminal.

[0067] In one possible implementation, the control panel system may be an air conditioning control panel system. The control panel system of the present application can realize both detection and control output functions in the air conditioning control panel system. In other words, one pin in the air conditioning control panel system of the present application can correspond to two functions, thereby reducing the use of circuit components and improving compatibility.

[0068] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0069] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A control panel system, characterized in that: The control board system includes a switching circuit, a detection circuit, a control output circuit and a main control chip; The switching circuit includes: a first input terminal, a first output terminal, and a second output terminal; The first input terminal is connected to the control signal output terminal of the main control chip; The first output end is connected to the detection circuit; The second output terminal is connected to the control output circuit; The main control chip is used to control the switching circuit to connect with the detection circuit when outputting a first control signal to the switching circuit, and to control the switching circuit to connect with the control output circuit when outputting a second control signal to the switching circuit.

2. The control panel system according to claim 1, characterized in that: The detection circuit includes: a first diode, a first resistor, a second resistor, a first insulated gate bipolar transistor and a micro-control unit; The first port of the first diode is connected to the first output end; The second end of the first diode is connected to the first end of the first resistor, the second end of the first resistor is connected to the first end of the second resistor, and the second end of the second resistor is connected to the base of the first insulated gate bipolar transistor; The collector of the first insulated gate bipolar transistor is connected to the control input terminal of the micro-control unit; The first insulated gate bipolar transistor is configured to be turned on or off according to the first control signal to control the input voltage of the micro-control unit.

3. The control panel system according to claim 2, characterized in that: The detection circuit is further configured to convert the first control signal into at least one of the following signals: a square wave signal of the micro-control unit, a low level signal of the micro-control unit, or a high level signal of the micro-control unit.

4. The control panel system according to claim 2, characterized in that: The detection circuit further includes a third resistor and a fourth resistor; A first end of the third resistor is connected to the second resistor and the base of the first insulated gate bipolar transistor respectively, a second end of the third resistor is connected to the emitter of the first insulated gate bipolar transistor and a second end of the third resistor is grounded; The first end of the fourth resistor is connected to the collector of the first insulated gate bipolar transistor and the control input end of the micro-control unit respectively.

5. The control panel system according to claim 1, wherein: The control output circuit is connected to the auxiliary heating circuit; The control output circuit is used to output a target voltage value to the auxiliary heating circuit according to the second control signal.

6. The control panel system according to claim 1, wherein: The main control chip includes: a voltage input terminal, a fifth resistor and a second insulated gate bipolar transistor; The voltage input terminal is connected to the collector of the second insulated gate bipolar transistor; The base of the second insulated gate bipolar transistor is connected to the first end of the fifth resistor; the second end of the fifth resistor is connected to the control signal output end of the main control chip; The emitter of the second insulated gate bipolar transistor is grounded; The control signal output terminal of the main control chip is used to output the first control signal or the second control signal according to the voltage input by the voltage input terminal.

7. The control panel system according to claim 6, characterized in that The main control chip further includes: a sixth resistor; The first end of the sixth resistor is connected to the first end of the fifth resistor and the base of the second insulated gate bipolar transistor respectively; The second end of the sixth resistor is connected to the emitter of the second insulated gate bipolar transistor.

8. The control panel system according to claim 1, wherein: The switching circuit includes at least one of the following: a double-throw relay, an operational amplifier circuit, a triode or a metal oxide semiconductor field effect transistor.

9. The control panel system according to claim 8, characterized in that: When the switching circuit includes a double-throw relay, the NC contact of the double-throw relay is connected to the detection circuit, and the NO contact of the double-throw relay is connected to the control output circuit.

10. The control panel system according to claim 1, wherein: The control panel system is an air conditioning control panel system.

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