Air conditioning control system

Abstract

The air conditioner control system provided by the application comprises an automatic control circuit and a manual control circuit electrically connected with the air conditioner, and a switching circuit is arranged to switch the independent operation of the automatic control circuit or the manual control circuit, so that when the air conditioner control system encounters strong electromagnetic interference and the like and the automatic control circuit cannot control the air conditioner, the manual control circuit can be switched to control the air conditioner, thereby improving the operation reliability of the air conditioner control system. In addition, in the manual control circuit, when any one of the temperature-increasing dehumidification circuit or the temperature-lowering dehumidification circuit is disconnected, i.e. not started, the remaining another circuit needs to be operated after the compressor is started, thereby effectively avoiding the simultaneous starting of the temperature-increasing dehumidification circuit or the temperature-lowering dehumidification circuit due to misoperation, and the refrigerant in different temperature and / or pressure states entering the same circuit and causing the decline of the refrigeration or heating effect, thereby guaranteeing the refrigeration or heating dehumidification effect of the air conditioner operation.

Description

Technical Field

[0001] This application relates to the field of air conditioning equipment technology, and more particularly to an air conditioning control system. Background Technology

[0002] In harsh environments, such as nuclear power plants with strong electromagnetic interference, in order to prevent strong electromagnetic interference from causing the air conditioner to malfunction, it is usually necessary to set up a control system with manual and automatic modes for the air conditioner. Users can freely switch between automatic and manual modes to control the air conditioner as needed, so as to ensure that the air conditioner can operate normally even in environments with strong electromagnetic interference.

[0003] However, in the existing technology, the operation logic of the manual mode is relatively complex, and users are prone to misoperation in the manual mode, which may result in poor cooling and dehumidification or heating and dehumidification effects of the air conditioner. Summary of the Invention

[0004] This application provides an air conditioning control system to solve the technical problem that the air conditioner has poor cooling and dehumidification or heating and dehumidification effects when manually controlled.

[0005] On the one hand, this application provides an air conditioning control system, including: an air conditioner, an automatic control circuit, a manual control circuit, and a switching circuit;

[0006] The automatic control circuit and the manual control circuit are electrically connected to the air conditioner and the switching circuit, respectively. The switching circuit is used to switch the independent control of the air conditioner by the automatic control circuit or the manual control circuit.

[0007] The air conditioner includes a compressor, a cooling and dehumidifying circuit, and a heating and dehumidifying circuit. The cooling and dehumidifying circuit and the heating and dehumidifying circuit are respectively connected to the compressor. When the switching circuit is switched to the manual control circuit for independent operation, the manual control circuit is used to control the disconnection of either the heating and dehumidifying circuit or the cooling and dehumidifying circuit, and to control the other circuit of either the heating and dehumidifying circuit or the cooling and dehumidifying circuit to operate only after the compressor is started.

[0008] In one possible implementation of this application, the cooling and dehumidification circuit includes a cooling and dehumidification solenoid valve, and the heating and dehumidification circuit includes a heating and dehumidification solenoid valve.

[0009] The switching circuit includes a multiplex switch and a sixteenth intermediate relay that are electrically connected. The multiplex switch is used to switch the automatic control circuit or the manual control circuit to operate independently. The multiplex switch includes a second sub-switch and a fourth sub-switch that are connected in parallel. The power line is connected in series with the normally closed contact of the fourth sub-switch and the sixteenth intermediate relay.

[0010] The automatic control circuit includes a controller, a second intermediate relay, a fourth intermediate relay, and a fifth intermediate relay. The controller is electrically connected to a power supply line. The control coils of the second, fourth, and fifth intermediate relays are respectively electrically connected to the controller. The second intermediate relay is used to control the operation of the compressor according to the control signal from the controller. The fourth intermediate relay is used to control the activation of the cooling and dehumidifying solenoid valve according to the control signal from the controller. The fifth intermediate relay is used to control the activation of the heating and dehumidifying solenoid valve according to the control signal from the controller.

[0011] The manual control circuit includes a second switch, a fourteenth intermediate relay, and a second AC relay. The second AC relay is electrically connected to the compressor. The second switch is connected in series with the control coil of the fourteenth intermediate relay and then electrically connected to the power supply line. The two ends of the normally open contact of the fourteenth intermediate relay are respectively electrically connected to the normally open contact of the second sub-switch and the control coil of the second AC relay. The two ends of the normally open contact of the second intermediate relay are respectively electrically connected to the normally closed contact of the second sub-switch and the control coil of the second AC relay. The two ends of the normally open contact of the fourth intermediate relay are respectively electrically connected to the power supply line, the normally open contact of the sixteenth intermediate relay, and the cooling and dehumidifying solenoid valve. The normally open contacts of the relays are electrically connected to the power supply line, the normally closed contact of the sixteenth intermediate relay, and the cooling and dehumidifying solenoid valve, respectively. The normally open contacts of the fifth and sixteenth intermediate relays are connected in series with the heating and dehumidifying solenoid valve and then electrically connected to the power supply line. Alternatively, the normally open contacts of the fourth intermediate relay are electrically connected to the power supply line, the normally open contact of the sixteenth intermediate relay, and the heating and dehumidifying solenoid valve, respectively. The normally open contacts of the second AC relay are electrically connected to the power supply line, the normally closed contact of the sixteenth intermediate relay, and the heating and dehumidifying solenoid valve, respectively. The normally open contacts of the fifth and sixteenth intermediate relays are connected in series with the cooling and dehumidifying solenoid valve and then electrically connected to the power supply line.

[0012] In one possible implementation of this application, the air conditioner further includes a blower and a condenser fan;

[0013] The multiplexer also includes a first sub-switch and a third sub-switch connected in parallel.

[0014] The automatic control circuit further includes a first intermediate relay and a third intermediate relay. The control coils of the first intermediate relay and the third intermediate relay are electrically connected to the controller. The first intermediate relay is used to control the operation of the blower according to the control signal of the controller, and the fourth intermediate relay is used to control the operation of the condenser fan according to the control signal of the controller.

[0015] The manual control circuit also includes a first switching switch, a third switching switch, a thirteenth intermediate relay, a fifteenth intermediate relay, a first AC relay, and a third AC relay. The first AC relay is electrically connected to the fan, and the third AC relay is electrically connected to the condenser fan. The normally open contact of the first switching switch is connected in series with the control coil of the thirteenth intermediate relay and then electrically connected to the power supply line. The normally open contact of the third switching switch is connected in series with the control coil of the fifteenth intermediate relay and then electrically connected to the power supply line.

[0016] The normally open contact of the first sub-switch is connected in series between the normally open contact of the thirteenth intermediate relay and the control coil of the first AC relay; the normally open contact of the first intermediate relay is connected in series between the normally closed contact of the first sub-switch and the control coil of the first AC relay; the normally open contact of the fourteenth intermediate relay is connected in series between the normally open contact of the second sub-switch and the control coil of the second AC relay; the normally open contact of the second intermediate relay is connected in series between the normally closed contact of the second sub-switch and the control coil of the second AC relay; the normally open contact of the fifteenth intermediate relay is connected in series between the normally open contact of the third sub-switch and the control coil of the third AC relay; the normally open contact of the third intermediate relay is connected in series between the normally closed contact of the third sub-switch and the control coil of the third AC relay.

[0017] In one possible implementation of this application, the automatic control circuit further includes a sixth intermediate relay, a seventh intermediate relay, an eighth intermediate relay, a ninth intermediate relay, a tenth intermediate relay, an eleventh intermediate relay, a first thermal relay, a second thermal relay, a high-voltage switch, a low-voltage switch, an exhaust switch, and a third thermal relay.

[0018] The first thermal relay is connected in series with the control coil of the sixth intermediate relay and then electrically connected to the power supply line; the second thermal relay is connected in series with the control coil of the seventh intermediate relay and then electrically connected to the power supply line; the high-voltage switch is connected in series with the control coil of the eighth intermediate relay and then electrically connected to the power supply line; the low-voltage switch is connected in series with the control coil of the ninth intermediate relay and then electrically connected to the power supply line; the exhaust switch is connected in series with the control coil of the tenth intermediate relay and then electrically connected to the power supply line; and the third thermal relay is connected in series with the control coil of the eleventh intermediate relay and then electrically connected to the power supply line.

[0019] The normally open contact of the sixth intermediate relay is electrically connected to the controller and is used to send a blower overload alarm signal to the controller. The normally open contact of the sixth intermediate relay is also connected in series between the multiplexer and the control coil of the first AC relay. The normally open contact of the seventh intermediate relay is electrically connected to the controller and is used to send a compressor overload alarm signal to the controller. The normally open contact of the eighth intermediate relay is electrically connected to the controller and is used to send a compressor high-pressure alarm signal to the controller. The normally open contact of the ninth intermediate relay is electrically connected to the controller and is used to send a compressor low-pressure alarm signal to the controller. The normally open contact of the tenth intermediate relay is electrically connected to the controller and is used to send a compressor exhaust alarm signal to the controller. The normally open contact of the eleventh intermediate relay is electrically connected to the controller and is used to send a condenser fan overload alarm signal to the controller.

[0020] In one possible implementation of this application, the automatic control circuit further includes a twelfth intermediate relay;

[0021] The normally open contacts of the twelfth intermediate relay, the seventh intermediate relay, the eighth intermediate relay, the ninth intermediate relay, and the tenth intermediate relay, and the control coil of the twelfth intermediate relay are connected in series and then connected to the power supply line. The two ends of the normally closed contact of the sixteenth intermediate relay are electrically connected to the power supply line and between the normally open contact of the twelfth intermediate relay and the normally open contact of the seventh intermediate relay, respectively.

[0022] The normally open contact of the twelfth intermediate relay is also connected in series between the normally open contact of the fourteenth intermediate relay and the control coil of the second AC relay.

[0023] In one possible implementation of this application, the air conditioner further includes a first motor, a second motor, and a third motor, wherein the first motor is driven to the blower, the second motor is driven to the compressor, and the third motor is driven to the condenser fan;

[0024] The automatic control circuit also includes a first circuit breaker, a second circuit breaker, and a third circuit breaker. The power supply line is connected in series with the first circuit breaker, the normally open contact of the first AC relay, the first thermal relay, and the first motor. The power supply line is also connected in series with the second circuit breaker, the normally open contact of the second AC relay, the second thermal relay, and the second motor. The power supply line is also connected in series with the third circuit breaker, the normally open contact of the third AC relay, the first thermal relay, and the third motor.

[0025] In one possible implementation of this application, the air conditioning control system further includes a display screen electrically connected to the controller.

[0026] In one possible implementation of this application, the air conditioning control system further includes a control panel, wherein the display screen, the first switching switch, the second switching switch, the third switching switch, and the multiplexer are all arranged on the control panel.

[0027] In one possible implementation of this application, the automatic control circuit further includes a seventeenth intermediate relay, the control coil of which is connected in parallel with the control coil of the sixteenth intermediate relay;

[0028] The air conditioning control system also includes a water valve and an actuator, the actuator being electrically connected to the water valve and used to control the water valve;

[0029] The normally open contact of the seventeenth intermediate relay is connected in series between the control input terminal of the actuator and the controller, and the controller is used to output a control signal to the actuator; the normally open contact of the seventeenth intermediate relay is also electrically connected to the controller, and is used to send an automatic status input signal to the controller.

[0030] In one possible implementation of this application, the automatic control circuit further includes an eighteenth intermediate relay and at least two connection terminals, wherein the at least two connection terminals are connected in series with the eighteenth intermediate relay and then electrically connected to a power supply line;

[0031] The normally open contact of the eighteenth intermediate relay is electrically connected to the controller and is used to send a special alarm input signal to the controller.

[0032] This application provides an air conditioning control system that, by setting up an automatic control circuit and a manual control circuit electrically connected to the air conditioner, and by setting up a switching circuit to switch between the independent operation of the automatic control circuit and the manual control circuit, allows the air conditioning control system to be manually switched to the manual control circuit to control the air conditioner when the automatic control circuit fails to control the air conditioner due to strong electromagnetic interference, thereby improving the operational reliability of the air conditioning control system. Furthermore, in the manual control circuit, if either the heating / dehumidification circuit or the cooling / dehumidification circuit is disconnected (i.e., does not start), the remaining circuit will only start after the compressor starts. This effectively avoids the simultaneous activation of the heating / dehumidification circuit or the cooling / dehumidification circuit due to misoperation, which would cause refrigerants at different temperatures and / or pressures to enter the same circuit for neutralization, thus reducing the cooling or heating effect and ensuring the cooling, heating, and dehumidification effect of the air conditioner. Attached Figure Description

[0033] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0034] Figure 1 This is a schematic diagram of the structure of a portion of the circuit of the air conditioning control system provided in an embodiment of this application;

[0035] Figure 2 This is a schematic diagram of the remaining circuitry of the air conditioning control system provided in an embodiment of this application;

[0036] Figure 3 A schematic diagram of the circuit structure of the power circuit of the air conditioning control system provided in the embodiments of this application;

[0037] Figure 4 This is a schematic diagram of the structure of the control panel of the air conditioning control system provided in an embodiment of this application.

[0038] Figure label:

[0039] Controller 100, control panel 200, display screen 300, actuator 400, first motor 500, second motor 600, third motor 700. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0041] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0045] Please refer to Figures 1 to 4 This application provides an air conditioning control system, including: an air conditioner, an automatic control loop, a manual control loop, and a switching loop;

[0046] The automatic control circuit and the manual control circuit are electrically connected to the air conditioner and the switching circuit, respectively. The switching circuit is used to switch between the automatic control circuit and the manual control circuit to independently control the air conditioner.

[0047] An air conditioner includes a compressor, a cooling and dehumidifying circuit, and a heating and dehumidifying circuit. The cooling and dehumidifying circuit and the heating and dehumidifying circuit are respectively connected to the compressor. When the switching circuit is switched to the manual control circuit for independent operation, the manual control circuit is used to control the disconnection of either the heating and dehumidifying circuit or the cooling and dehumidifying circuit, and to control the other circuit of either the heating and dehumidifying circuit or the cooling and dehumidifying circuit to operate only after the compressor starts.

[0048] It should be noted that an air conditioner (not shown in the diagram) typically also includes components such as a condenser (not shown in the diagram), an evaporator (not shown in the diagram), and an expansion valve (not shown in the diagram). Air conditioners generally have two operating modes: a cooling cycle and a heating cycle. In the cooling cycle, the compressor compresses the gaseous refrigerant into a high-temperature, high-pressure gaseous state and sends it to the condenser for cooling. After cooling, it becomes a medium-temperature, high-pressure liquid refrigerant. This medium-temperature liquid refrigerant is then throttled and depressurized by the expansion valve into a low-temperature, low-pressure gas-liquid mixture. This mixture then absorbs heat from the air and vaporizes, returning to the compressor for further compression and cycling. In the heating cycle, the flow direction of the refrigerant between the condenser and evaporator is reversed compared to the cooling cycle, resulting in cold air being blown outdoors and hot air being blown indoors. Correspondingly, by setting two different solenoid valves to connect to the pipeline, compressor, condenser, and evaporator respectively, two refrigerant flow loops can be formed. The two modes of operation, refrigeration cycle and heating cycle, can be run separately by starting and stopping the two different solenoid valves.

[0049] It is also worth noting that when the indoor relative humidity is high in summer, it is usually necessary to frequently and briefly turn on the cooling cycle to dehumidify, while when the indoor relative humidity is high in winter, it is usually necessary to frequently and briefly turn on the heating cycle to dehumidify. Therefore, the circuits composed of the two different electronic valves mentioned above can also be used for dehumidification in summer or winter, namely, the cooling dehumidification circuit and the heating dehumidification circuit.

[0050] By setting up automatic and manual control circuits for the air conditioner and a switching circuit to allow independent operation of either circuit, the system can be manually switched to control the air conditioner when the automatic control circuit fails due to strong electromagnetic interference. This improves the reliability of the air conditioning control system. Furthermore, in the manual control circuit, if either the heating / dehumidification or cooling / dehumidification circuit is disconnected (i.e., it doesn't start), the remaining circuit will only operate after the compressor starts. This effectively prevents simultaneous activation of either circuit due to misoperation, which could lead to refrigerants at different temperatures and / or pressures entering the same circuit and causing a decrease in cooling or heating efficiency. This ensures the air conditioner's optimal cooling, heating, and dehumidification performance.

[0051] In particular, since the heating and dehumidification circuit or the cooling and dehumidification circuit needs to be started after the compressor is started, it effectively avoids damage caused by the lack of refrigerant flow in the circuit, thereby effectively reducing the chance of damage to each circuit and extending the service life of the air conditioner.

[0052] In some embodiments, the cooling and dehumidification circuit includes a cooling and dehumidification solenoid valve SLOV1, and the heating and dehumidification circuit includes a heating and dehumidification solenoid valve SLOV2.

[0053] The switching circuit includes a multiplex switch SB4 and a sixteenth intermediate relay KA16 that are electrically connected. The multiplex switch SB4 is used to switch between automatic control circuit and manual control circuit for independent operation. The multiplex switch SB4 includes a second sub-switch and a fourth sub-switch that are set in parallel. The power line is connected in series with the normally closed contact of the fourth sub-switch and the sixteenth intermediate relay KA16.

[0054] The automatic control circuit includes a controller 100, a second intermediate relay KA2, a fourth intermediate relay KA4, and a fifth intermediate relay KA5. The controller 100 is electrically connected to a power supply line. The control coils of the second intermediate relay KA2, the fourth intermediate relay KA4, and the fifth intermediate relay KA5 are electrically connected to the controller 100. The second intermediate relay KA2 is used to control the operation of the compressor according to the control signal from the controller 100. The fourth intermediate relay KA4 is used to control the start of the cooling and dehumidifying solenoid valve SLOV1 according to the control signal from the controller 100. The fifth intermediate relay KA5 is used to control the start of the heating and dehumidifying solenoid valve SLOV2 according to the control signal from the controller 100.

[0055] The manual control circuit includes a second changeover switch SB2, a fourteenth intermediate relay KA14, and a second AC relay KM2. The second AC relay KM2 is electrically connected to the compressor. The second changeover switch SB2 is connected in series with the control coil of the fourteenth intermediate relay KA14 and then electrically connected to the power supply line. The two ends of the normally open contact of the fourteenth intermediate relay KA14 are respectively electrically connected to the normally open contact of the second sub-switch and the control coil of the second AC relay KM2. The two ends of the normally open contact of the second intermediate relay KA2 are respectively electrically connected to the normally closed contact of the second sub-switch and the control coil of the second AC relay KM2. The two ends of the normally open contact of the fourth intermediate relay KA4 are respectively electrically connected to the power supply line, the normally open contact of the sixteenth intermediate relay KA16, and the cooling and dehumidification solenoid valve SLOV1. The normally open contact of the second AC relay KM2... The two ends of the open contact are electrically connected to the power supply line, the normally closed contact of the sixteenth intermediate relay KA16, and the cooling and dehumidifying solenoid valve SLOV1, respectively. The normally open contacts of the fifth intermediate relay KA5 and the sixteenth intermediate relay KA16 are connected in series with the heating and dehumidifying solenoid valve SLOV2 and then electrically connected to the power supply line. Alternatively, the two ends of the normally open contact of the fourth intermediate relay KA4 are electrically connected to the power supply line, the normally open contact of the sixteenth intermediate relay KA16, and the heating and dehumidifying solenoid valve SLOV2, respectively. The two ends of the normally open contact of the second AC relay KM2 are electrically connected to the power supply line, the normally closed contact of the sixteenth intermediate relay KA16, and the heating and dehumidifying solenoid valve SLOV2, respectively. The normally open contacts of the fifth intermediate relay KA5 and the sixteenth intermediate relay KA16 are connected in series with the cooling and dehumidifying solenoid valve SLOV1 and then electrically connected to the power supply line.

[0056] It should be noted that a relay typically includes a control coil, normally closed contacts, and normally open contacts. When the control coil is energized and conducts, the normally closed contacts become open, while the normally open contacts close.

[0057] It should also be noted that electrical connection includes at least one of telecommunication connection, electrical connection, and signal connection. The controller 100 has a pre-set control program that is electrically connected to other components of the air conditioner, allowing the controller 100 to control the operation of other components according to user instructions to achieve the operation of the air conditioner's heating or cooling cycle. Furthermore, achieving automatic operation of the entire air conditioner by pre-setting a control program in the controller 100 is a common practice in the field and will not be elaborated upon further here.

[0058] It should also be noted that the multiplexer SB4 includes multiple sub-switches connected in parallel, such as... Figure 2As shown, it includes four sub-switches arranged from left to right, namely the first sub-switch, the second sub-switch, the third sub-switch, and the fourth sub-switch. Each sub-switch has two sets of contacts, namely normally open contacts and normally closed contacts. When the switching switch is triggered, the multiple sub-switches operate synchronously. That is, the normally open contacts and normally closed contacts of the multiple sub-switches before the triggering are all switched to normally closed contacts and normally open contacts after the multiple-way switching switch SB4 is triggered.

[0059] Preferably, the second switching switch SB2 and the multiplexer SB4 are rotary switches.

[0060] It should also be noted that the power cord in this embodiment is preferably AC 220V mains power, which includes a live wire (L) and a neutral wire (N).

[0061] The following explanation uses the example of disconnecting the heating and dehumidification circuit in the manual control loop:

[0062] After the user triggers the multiplexer SB4, the automatic control circuit is disconnected, the automatic mode is turned off, the manual control circuit is activated, and the manual mode is turned on. The fourth sub-switch, due to its triggering, de-energizes the control coil of the sixteenth intermediate relay KA16, preventing its normally open contact from closing. Furthermore, the de-energization of controller 100 de-energizes the control coil of the fifth intermediate relay KA5, further preventing its normally open contact from closing. This ensures that the heating and dehumidifying solenoid valve SLOV2 is never energized. Correspondingly, the de-energization of controller 100 causes the fourth intermediate relay K... When the control coil of A4 is de-energized, the normally open contact of the fourth intermediate relay KA4 fails to close, and the normally open contact of the sixteenth intermediate relay KA16 also fails to close. At this time, the cooling and dehumidifying solenoid valve SLOV1 is also de-energized. When the second switching switch SB2 is triggered, the control coil of the fourteenth intermediate relay KA14 is energized and engaged. This, combined with the simultaneously triggered second sub-switch, energizes the control coil of the second AC relay KM2, causing its normally open contact to close and connect with the normally closed contact of the sixteenth intermediate relay KA16 to the cooling and dehumidifying solenoid valve SLOV1. Therefore, the cooling and dehumidifying solenoid valve SLOV1 can only be opened after the compressor is manually started.

[0063] Specifically, when the cooling and dehumidification circuit is disconnected in the manual control circuit, simply replace the positions of the cooling and dehumidification solenoid valve SLOV1 and the heating and dehumidification solenoid valve SLOV2 mentioned above. The implementation principle is similar to that described above, and will not be elaborated further here.

[0064] In particular, when switching to the automatic control loop, the controller 100 is powered on, which can control the power-on of the second intermediate relay KA2, the fourth intermediate relay KA4 and the fifth intermediate relay KA5 respectively, thereby powering the compressor, the cooling and dehumidifying solenoid valve SLOV1 and the heating and dehumidifying solenoid valve SLOV2 respectively.

[0065] Specifically, the controller 100 in this embodiment is preferably a PLC, i.e., a programmable controller. It is suitable for automatic control in relatively harsh environments and can improve the operational reliability of the controller 100.

[0066] Furthermore, in other embodiments, the controller 100 may also be a microcontroller, etc., without further limitation.

[0067] In some embodiments, the air conditioner further includes a blower and a condenser fan;

[0068] The multiplex switch SB4 also includes a first sub-switch and a third sub-switch configured in parallel;

[0069] The automatic control circuit also includes a first intermediate relay KA1 and a third intermediate relay KA3. The control coils of the first intermediate relay KA1 and the third intermediate relay KA3 are electrically connected to the controller 100. The first intermediate relay KA1 is used to control the operation of the blower according to the control signal of the controller 100, and the fourth intermediate relay KA4 is used to control the operation of the condenser fan according to the control signal of the controller 100.

[0070] The manual control circuit also includes a first switching switch SB1, a third switching switch SB3, a thirteenth intermediate relay KA13, a fifteenth intermediate relay KA15, a first AC relay KM1, and a third AC relay KM3. The first AC relay KM1 is electrically connected to the fan, and the third AC relay KM3 is electrically connected to the condenser fan. The normally open contact of the first switching switch SB1 is connected in series with the control coil of the thirteenth intermediate relay KA13 and then electrically connected to the power supply line. The normally open contact of the third switching switch SB3 is connected in series with the control coil of the fifteenth intermediate relay KA15 and then electrically connected to the power supply line.

[0071] The normally open contact of the first sub-switch is connected in series between the normally open contact of the thirteenth intermediate relay KA13 and the control coil of the first AC relay KM1. The normally open contact of the first intermediate relay KA1 is connected in series between the normally closed contact of the first sub-switch and the control coil of the first AC relay KM1. The normally open contact of the fourteenth intermediate relay KA14 is connected in series between the normally open contact of the second sub-switch and the control coil of the second AC relay KM2. The normally open contact of the second intermediate relay KA2 is connected in series between the normally closed contact of the second sub-switch and the control coil of the second AC relay KM2. The normally open contact of the fifteenth intermediate relay KA15 is connected in series between the normally open contact of the third sub-switch and the control coil of the third AC relay KM3. The normally open contact of the third intermediate relay KA3 is connected in series between the normally closed contact of the third sub-switch and the control coil of the third AC relay KM3.

[0072] It should be noted that air conditioners are usually also equipped with a blower (not shown in the picture) to blow air through the evaporator to supply air to the room, and also have a condenser fan (not shown in the picture) to blow air through the condenser to drive a large amount of airflow through the condenser.

[0073] When switching to manual control circuit independent operation, triggering the first switching switch SB1 energizes the control coil of the thirteenth intermediate relay KA13, causing its normally open contact to close. At the same time, the normally open contact of the first sub-switch closes, energizing the control coil of the first AC relay KM1, thereby starting the blower. Triggering the third switching switch SB3 energizes the control coil of the fifteenth intermediate relay KA15, causing its normally open contact to close. At the same time, the normally open contact of the third sub-switch closes, energizing the control coil of the third AC relay KM3, thereby starting the condenser fan.

[0074] Correspondingly, when switching to the automatic control loop, the controller 100 is powered on, which can control the power supply of the first intermediate relay KA1 and the third intermediate relay KA3 respectively, thereby powering the blower and the condenser fan respectively.

[0075] Preferably, the first switching switch SB1 and the third switching switch SB3 are rotary switches.

[0076] In some embodiments, the automatic control circuit further includes a sixth intermediate relay KA6, a seventh intermediate relay KA7, an eighth intermediate relay KA8, a ninth intermediate relay KA9, a tenth intermediate relay KA10, an eleventh intermediate relay KA11, a first thermal relay FR1, a second thermal relay FR2, a high-voltage switch KHP, a low-voltage switch KLP, an exhaust switch KEP, and a third thermal relay FR3.

[0077] The first thermal relay FR1 is connected in series with the control coil of the sixth intermediate relay KA6 and then electrically connected to the power supply line. The second thermal relay FR2 is connected in series with the control coil of the seventh intermediate relay KA7 and then electrically connected to the power supply line. The high-voltage switch KHP is connected in series with the control coil of the eighth intermediate relay KA8 and then electrically connected to the power supply line. The low-voltage switch KLP is connected in series with the control coil of the ninth intermediate relay KA9 and then electrically connected to the power supply line. The exhaust switch KEP is connected in series with the control coil of the tenth intermediate relay KA10 and then electrically connected to the power supply line. The third thermal relay FR3 is connected in series with the control coil of the eleventh intermediate relay KA11 and then electrically connected to the power supply line.

[0078] The normally open contact of the sixth intermediate relay KA6 is electrically connected to the controller 100, and is used to send a blower overload alarm signal to the controller 100. The normally open contact of the sixth intermediate relay KA6 is also connected in series between the multiplexer SB4 and the control coil of the first AC relay KM1. The normally open contact of the seventh intermediate relay KA7 is electrically connected to the controller 100, and is used to send a compressor overload alarm signal to the controller 100. The normally open contact of the eighth intermediate relay KA8 is electrically connected to the controller 100, and is used to send a compressor high-pressure alarm signal to the controller 100. The normally open contact of the ninth intermediate relay KA9 is electrically connected to the controller 100, and is used to send a compressor low-pressure alarm signal to the controller 100. The normally open contact of the tenth intermediate relay KA10 is electrically connected to the controller 100, and is used to send a compressor exhaust alarm signal to the controller 100. The normally open contact of the eleventh intermediate relay KA11 is electrically connected to the controller 100, and is used to send a condenser fan overload alarm signal to the controller 100.

[0079] It should be noted that when faced with harsh outdoor environments or aging of components inside the air conditioner, certain components may operate under high load, which could lead to damage to the air conditioner.

[0080] It should also be noted that the first thermal relay FR1 is electrically connected to the blower and is used to detect whether the blower is overloaded; the second thermal relay FR2 is electrically connected to the compressor and is used to detect whether the compressor is overloaded; the high-pressure switch KHP is electrically connected to the compressor and is used to detect whether the internal pressure of the compressor is too high; the low-pressure switch KLP is electrically connected to the compressor and is used to detect whether the internal pressure of the compressor is too low; the exhaust switch KEP is electrically connected to the compressor and is used to detect whether the compressor is exhausting normally; and the third thermal relay FR3 is electrically connected to the condenser fan and is used to detect whether the condenser fan is overloaded.

[0081] When switching to manual control circuit for independent operation and the blower is not overloaded, the control coil of the sixth intermediate relay KA6 is energized, causing its normally open contact to close, thus ensuring that the first AC relay KM1 is continuously energized. However, when the blower is overloaded, the control coil of the sixth intermediate relay KA6 is not energized, causing its normally open contact to remain open, thereby de-energizing the first AC relay KM1 and stopping the blower, ensuring the safe operation of the blower and extending the service life of the air conditioner.

[0082] When switching to manual control circuit for independent operation and the condenser fan is not overloaded, the control coil of the eleventh intermediate relay KA11 is energized, causing its normally open contact to close, thus ensuring that the third AC relay KM3 is continuously energized. However, when the condenser fan is overloaded, the control coil of the eleventh intermediate relay KA11 is not energized, causing its normally open contact to remain open, thereby de-energizing the third AC relay KM3 and stopping the condenser fan. This ensures the safe operation of the condenser fan and extends the service life of the air conditioner.

[0083] When switching to independent operation of the automatic control circuit, the energization of the control coils of the sixth intermediate relay KA6, or the seventh intermediate relay KA7, or the eighth intermediate relay KA8, or the ninth intermediate relay KA9, or the tenth intermediate relay KA10, or the eleventh intermediate relay KA11 will cause their corresponding normally open contacts to close, thereby inputting the corresponding alarm signal to the controller 100, so that the controller 100 can adjust its operation according to the internally preset control program.

[0084] In some embodiments, the automatic control circuit further includes a twelfth intermediate relay KA12;

[0085] The normally open contacts of the twelfth intermediate relay KA12, the seventh intermediate relay KA7, the eighth intermediate relay KA8, the ninth intermediate relay KA9, and the tenth intermediate relay KA10, and the control coil of the twelfth intermediate relay KA12 are connected in series and then connected to the power supply line. The two ends of the normally closed contact of the sixteenth intermediate relay KA16 are electrically connected between the power supply line and the normally open contact of the twelfth intermediate relay KA12 and the normally open contact of the seventh intermediate relay KA7, respectively.

[0086] The normally open contact of the twelfth intermediate relay KA12 is also connected in series between the normally open contact of the fourteenth intermediate relay KA14 and the control coil of the second AC relay KM2.

[0087] When switching to manual control circuit independent operation, the normally closed contact of the sixteenth intermediate relay KA16 remains open. When the compressor is not overloaded, there is no high or low pressure internally, and the exhaust is normal, the normally open contacts of the seventh intermediate relay KA7, eighth intermediate relay KA8, ninth intermediate relay KA9, and tenth intermediate relay KA10 are all energized and closed. This energizes the control coil of the twelfth intermediate relay KA12, causing its normally open contact to close, and energizes the second AC relay KM2, starting the compressor. The control coil of the twelfth intermediate relay KA12, its normally open contact, and the normally closed contact of the sixteenth intermediate relay KA16 form an "automatic start-stop" circuit, ensuring continuous power supply during normal compressor operation.

[0088] However, when the compressor is overloaded, or there is high or low pressure inside, or the exhaust is abnormal, the normally open contact of any one of the seventh intermediate relay KA7, the eighth intermediate relay KA8, the ninth intermediate relay KA9, or the tenth intermediate relay KA10 is de-energized and held, causing the control coil of the twelfth intermediate relay KA12 to be de-energized and held, thereby stopping the compressor from running, ensuring the safe operation of the compressor, and extending the service life of the air conditioner.

[0089] In some embodiments, the air conditioner further includes a first motor 500, a second motor 600, and a third motor 700, wherein the first motor 500 is driven to a blower, the second motor 600 is driven to a compressor, and the third motor is driven to a condenser fan.

[0090] The automatic control circuit also includes a first circuit breaker QF1, a second circuit breaker QF2, and a third circuit breaker QF3. The power supply line is connected in series with the first circuit breaker QF1, the normally open contact of the first AC relay KM1, the first thermal relay FR1, and the first motor 500. The power supply line is also connected in series with the second circuit breaker QF2, the normally open contact of the second AC relay KM2, the second thermal relay FR2, and the second motor 600. The power supply line is also connected in series with the third circuit breaker QF3, the normally open contact of the third AC relay KM3, the first thermal relay FR1, and the third motor 700.

[0091] It should be noted that the first motor 500, the second motor 600, and the third motor 700 are all three-phase asynchronous motors, and all are connected to 380V three-phase AC power. Among them, the first motor 500 provides power to the blower, the second motor 600 provides power to the compressor, and the third motor 700 provides power to the condenser fan.

[0092] It should also be noted that circuit breakers can distribute electrical energy, but cannot frequently start asynchronous motors; they are used to protect power lines and motors.

[0093] When the control coil of the first AC relay KM1 is energized, causing its normally open contact to close, the first motor 500 is energized, thereby driving the blower to start. When the control coil of the first AC relay KM1 is de-energized, causing its normally open contact to remain open, the first motor 500 is de-energized, thereby stopping the blower. The first circuit breaker QF1 and the first thermal relay FR1 are both used to protect the first motor 500 and to disconnect in case of overload or other conditions. Furthermore, the operating principles of the second motor 600 and the third motor 700 are similar to those of the first motor 500 described above, and will not be elaborated upon further here.

[0094] Furthermore, the automatic control circuit also includes a fourth circuit breaker, QF4.

[0095] It is understandable that the controller 100 needs to be powered off and restarted when updating the control program. If the automatic control loop is still running at this time, it may cause the air conditioner to malfunction and be damaged.

[0096] By setting the fourth circuit breaker QF4 and disconnecting the fourth circuit breaker QF4 in the controller 100 during the update control program, it can be ensured that the first motor 500, the second motor 600 and the fourth motor in the power circuit all stop running, thereby ensuring that the air conditioner can only be shut down to update the program.

[0097] Specifically, the first motor 500, the second motor 600, and the third motor 700 are also grounded.

[0098] In some embodiments, the air conditioning control system further includes a display screen 300, which is electrically connected to the controller 100.

[0099] By connecting an external display screen 300 to the controller 100, different operating parameters of the air conditioner can be displayed in real time, such as the internal pressure of the compressor and the speed of the blower, as well as the indoor ambient temperature parameters; this allows users to intuitively understand the operating status of the air conditioner, thus facilitating the adjustment of the air conditioner's operation.

[0100] In addition, the display screen 300 can also be a touch screen with a built-in operation panel system for easy visual operation by the user.

[0101] In some embodiments, the air conditioning control system further includes a control panel 200, a display screen 300, a first switching switch SB1, a second switching switch SB2, a third switching switch SB3, and a multiplexer SB4, all arranged on the control panel 200.

[0102] By setting up a control panel 200 and integrating the display screen 300 and multiple switches on the control panel 200, users can complete all operations of the air conditioner on the control panel 200 alone, thereby improving the control integration of the air conditioner controller 100, simplifying user operation and improving user convenience.

[0103] In some embodiments, the automatic control circuit further includes a seventeenth intermediate relay KA17, the control coil of the seventeenth intermediate relay KA17 being connected in parallel with the control coil of the sixteenth intermediate relay KA16;

[0104] The air conditioning control system also includes a water valve and an actuator 400. The actuator 400 is electrically connected to the water valve (not shown in the figure) and is used to control the water valve.

[0105] The normally open contact of the seventeenth intermediate relay KA17 is connected in series between the control input terminal of the actuator 400 and the controller 100. The controller 100 is used to output control signals to the actuator 400. The normally open contact of the seventeenth intermediate relay KA17 is also electrically connected to the controller 100, and is used to send automatic status input signals to the controller 100.

[0106] When switching to independent operation of the automatic control circuit, the control coil of the seventeenth intermediate relay KA17 is energized and its normally open contact is closed, so that the controller 100 can apply different voltage control signals in the range of 0 to 10V to the actuator 400 to adjust the actuator 400 to operate at different power, thereby adjusting the conduction state of the water valve.

[0107] When switching to manual control circuit independent operation, the control coil of the seventeenth intermediate relay KA17 is de-energized and its normally open contact is held. The user needs to manually close the normally open contact of the seventeenth intermediate relay KA17 to make the actuator 400 run. However, at this time, the voltage applied to the actuator 400 is 10V, that is, the actuator 400 runs at maximum power.

[0108] In addition, when the control coil of the seventeenth intermediate relay KA17 is energized and its normally open contact is closed, it can also send an automatic status input signal to the controller 100 at the same time, that is, a signal that the air conditioner is in the automatic control loop operation mode, which improves the operational reliability of the air conditioner.

[0109] In some embodiments, the automatic control circuit further includes an eighteenth intermediate relay KA18 and at least two connection terminals DF1, wherein the at least two connection terminals DF1 are connected in series with the eighteenth intermediate relay KA18 and then electrically connected to the power supply line.

[0110] The normally open contact of the eighteenth intermediate relay KA18 is electrically connected to the controller 100, and is used to send special alarm input signals to the controller 100.

[0111] It should be noted that when installing an air conditioner, users may need to add additional sensors such as an airtight valve (not shown in the picture) and a fire damper (not shown in the picture) to detect the airtightness and fire conditions of the indoor environment.

[0112] Therefore, by setting two pre-short-circuited connection terminals DF1 and connecting them in series with the eighteenth intermediate relay KA18, when it is necessary to add sensors such as airtight valves and fire dampers, it is only necessary to remove the short-circuit wire between the two connection terminals DF1 and connect the corresponding sensor between the two connection terminals DF1.

[0113] In the event of abnormal indoor air pressure or fire, the sensor connected between the two terminals DF1 triggers an open circuit, de-energizing the control coil of the eighteenth intermediate relay KA18. In automatic mode, the controller 100 determines the fault and then controls the shutdown of the blower, compressor, or condenser fan according to a preset program. In manual mode, the normally open contact of the eighteenth intermediate relay KA18 remains open, de-energizing the multiplexer SB4. This prevents the control coils of the subsequent first AC relay KM1, second AC relay KM2, and third AC relay KM3 from being energized, thus preventing the blower, compressor, and condenser fan from starting. This protects the safety of the air conditioning control system.

[0114] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0115] The above provides a detailed description of an air conditioning control system provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An air conditioning control system, characterized in that, include: Air conditioners, automatic control circuits, manual control circuits, and switching circuits; The automatic control circuit and the manual control circuit are electrically connected to the air conditioner and the switching circuit, respectively. The switching circuit is used to switch between the automatic control circuit and the manual control circuit independently controlling the air conditioner. The air conditioner includes a compressor, a cooling and dehumidifying circuit, and a heating and dehumidifying circuit. The cooling and dehumidifying circuit and the heating and dehumidifying circuit are respectively connected to the compressor. When the switching circuit is switched to the manual control circuit for independent operation, the manual control circuit is used to control the disconnection of either the heating and dehumidifying circuit or the cooling and dehumidifying circuit, and to control the other circuit of either the heating and dehumidifying circuit or the cooling and dehumidifying circuit to operate only after the compressor is started. The cooling and dehumidification circuit includes a cooling and dehumidification solenoid valve, and the heating and dehumidification circuit includes a heating and dehumidification solenoid valve. The automatic control circuit includes a controller, a second intermediate relay, a fourth intermediate relay, and a fifth intermediate relay. The controller is electrically connected to a power supply line. The control coils of the second, fourth, and fifth intermediate relays are respectively electrically connected to the controller. The second intermediate relay is used to control the operation of the compressor according to the control signal from the controller. The fourth intermediate relay is used to control the activation of the cooling and dehumidification solenoid valve according to the control signal from the controller. The fifth intermediate relay is used to control the activation of the heating and dehumidification solenoid valve according to the control signal from the controller.

2. The air conditioning control system as described in claim 1, characterized in that, The switching circuit includes a multiplex switch and a sixteenth intermediate relay that are electrically connected. The multiplex switch is used to switch the automatic control circuit or the manual control circuit to operate independently. The multiplex switch includes a second sub-switch and a fourth sub-switch that are connected in parallel. The power line is connected in series with the normally closed contact of the fourth sub-switch and the sixteenth intermediate relay. The manual control circuit includes a second switching switch, a fourteenth intermediate relay, and a second AC relay. The second AC relay is electrically connected to the compressor. The second switching switch is connected in series with the control coil of the fourteenth intermediate relay and then electrically connected to the power supply line. The two ends of the normally open contact of the fourteenth intermediate relay are respectively electrically connected to the normally open contact of the second sub-switch and the control coil of the second AC relay. The two ends of the normally open contact of the second intermediate relay are respectively electrically connected to the normally closed contact of the second sub-switch and the control coil of the second AC relay. The two ends of the normally open contact of the fourth intermediate relay are electrically connected to the power supply line, the normally open contact of the sixteenth intermediate relay, and the cooling and dehumidifying solenoid valve, respectively. The two ends of the normally open contact of the second AC relay are electrically connected to the power supply line, the normally closed contact of the sixteenth intermediate relay, and the cooling and dehumidifying solenoid valve, respectively. The normally open contacts of the fifth and sixteenth intermediate relays are connected in series with the heating and dehumidifying solenoid valve and then electrically connected to the power supply line. Alternatively, the two ends of the normally open contact of the fourth intermediate relay are electrically connected to the power supply line, the normally open contact of the sixteenth intermediate relay, and the heating and dehumidifying solenoid valve, respectively. The two ends of the normally open contact of the second AC relay are electrically connected to the power supply line, the normally closed contact of the sixteenth intermediate relay, and the heating and dehumidifying solenoid valve, respectively. The normally open contacts of the fifth and sixteenth intermediate relays are connected in series with the cooling and dehumidifying solenoid valve and then electrically connected to the power supply line.

3. The air conditioning control system as described in claim 2, characterized in that, The air conditioner also includes a blower and a condenser fan; The multiplexer also includes a first sub-switch and a third sub-switch connected in parallel. The automatic control circuit further includes a first intermediate relay and a third intermediate relay. The control coils of the first intermediate relay and the third intermediate relay are electrically connected to the controller. The first intermediate relay is used to control the operation of the blower according to the control signal of the controller, and the fourth intermediate relay is used to control the operation of the condenser fan according to the control signal of the controller. The manual control circuit also includes a first switching switch, a third switching switch, a thirteenth intermediate relay, a fifteenth intermediate relay, a first AC relay, and a third AC relay. The first AC relay is electrically connected to the fan, and the third AC relay is electrically connected to the condenser fan. The normally open contact of the first switching switch is connected in series with the control coil of the thirteenth intermediate relay and then electrically connected to the power supply line. The normally open contact of the third switching switch is connected in series with the control coil of the fifteenth intermediate relay and then electrically connected to the power supply line. The normally open contact of the first sub-switch is connected in series between the normally open contact of the thirteenth intermediate relay and the control coil of the first AC relay; the normally open contact of the first intermediate relay is connected in series between the normally closed contact of the first sub-switch and the control coil of the first AC relay; the normally open contact of the fourteenth intermediate relay is connected in series between the normally open contact of the second sub-switch and the control coil of the second AC relay; the normally open contact of the second intermediate relay is connected in series between the normally closed contact of the second sub-switch and the control coil of the second AC relay; the normally open contact of the fifteenth intermediate relay is connected in series between the normally open contact of the third sub-switch and the control coil of the third AC relay; the normally open contact of the third intermediate relay is connected in series between the normally closed contact of the third sub-switch and the control coil of the third AC relay.

4. The air conditioning control system as described in claim 3, characterized in that, The automatic control circuit also includes a sixth intermediate relay, a seventh intermediate relay, an eighth intermediate relay, a ninth intermediate relay, a tenth intermediate relay, an eleventh intermediate relay, a first thermal relay, a second thermal relay, a high-voltage switch, a low-voltage switch, an exhaust switch, and a third thermal relay. The first thermal relay is connected in series with the control coil of the sixth intermediate relay and then electrically connected to the power supply line; the second thermal relay is connected in series with the control coil of the seventh intermediate relay and then electrically connected to the power supply line; the high-voltage switch is connected in series with the control coil of the eighth intermediate relay and then electrically connected to the power supply line; the low-voltage switch is connected in series with the control coil of the ninth intermediate relay and then electrically connected to the power supply line; the exhaust switch is connected in series with the control coil of the tenth intermediate relay and then electrically connected to the power supply line; and the third thermal relay is connected in series with the control coil of the eleventh intermediate relay and then electrically connected to the power supply line. The normally open contact of the sixth intermediate relay is electrically connected to the controller and is used to send a blower overload alarm signal to the controller. The normally open contact of the sixth intermediate relay is also connected in series between the multiplexer and the control coil of the first AC relay. The normally open contact of the seventh intermediate relay is electrically connected to the controller and is used to send a compressor overload alarm signal to the controller. The normally open contact of the eighth intermediate relay is electrically connected to the controller and is used to send a compressor high-pressure alarm signal to the controller. The normally open contact of the ninth intermediate relay is electrically connected to the controller and is used to send a compressor low-pressure alarm signal to the controller. The normally open contact of the tenth intermediate relay is electrically connected to the controller and is used to send a compressor exhaust alarm signal to the controller. The normally open contact of the eleventh intermediate relay is electrically connected to the controller and is used to send a condenser fan overload alarm signal to the controller.

5. The air conditioning control system as described in claim 4, characterized in that, The automatic control circuit also includes a twelfth intermediate relay; The normally open contacts of the twelfth intermediate relay, the seventh intermediate relay, the eighth intermediate relay, the ninth intermediate relay, and the tenth intermediate relay, and the control coil of the twelfth intermediate relay are connected in series and then connected to the power supply line. The two ends of the normally closed contact of the sixteenth intermediate relay are electrically connected to the power supply line and between the normally open contact of the twelfth intermediate relay and the normally open contact of the seventh intermediate relay, respectively. The normally open contact of the twelfth intermediate relay is also connected in series between the normally open contact of the fourteenth intermediate relay and the control coil of the second AC relay.

6. The air conditioning control system as described in claim 4, characterized in that, The air conditioner also includes a first motor, a second motor, and a third motor. The first motor is driven and connected to the blower, the second motor is driven and connected to the compressor, and the third motor is driven and connected to the condenser fan. The automatic control circuit also includes a first circuit breaker, a second circuit breaker, and a third circuit breaker. The power supply line is connected in series with the first circuit breaker, the normally open contact of the first AC relay, the first thermal relay, and the first motor. The power supply line is also connected in series with the second circuit breaker, the normally open contact of the second AC relay, the second thermal relay, and the second motor. The power supply line is also connected in series with the third circuit breaker, the normally open contact of the third AC relay, the first thermal relay, and the third motor.

7. The air conditioning control system as described in claim 3, characterized in that, The air conditioning control system also includes a display screen, which is electrically connected to the controller.

8. The air conditioning control system as described in claim 7, characterized in that, The air conditioning control system also includes a control panel, on which the display screen, the first switch, the second switch, the third switch, and the multi-way switch are all arranged.

9. The air conditioning control system as described in claim 2, characterized in that, The automatic control circuit also includes a seventeenth intermediate relay, the control coil of which is connected in parallel with the control coil of the sixteenth intermediate relay; The air conditioning control system also includes a water valve and an actuator, the actuator being electrically connected to the water valve and used to control the water valve; The normally open contact of the seventeenth intermediate relay is connected in series between the control input terminal of the actuator and the controller, and the controller is used to output a control signal to the actuator; the normally open contact of the seventeenth intermediate relay is also electrically connected to the controller, and is used to send an automatic status input signal to the controller.

10. The air conditioning control system as described in claim 2, characterized in that, The automatic control circuit also includes an eighteenth intermediate relay and at least two connection terminals, wherein the at least two connection terminals are connected in series with the eighteenth intermediate relay and then electrically connected to a power supply line; The normally open contact of the eighteenth intermediate relay is electrically connected to the controller and is used to send a special alarm input signal to the controller.

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