Fan coil driving device and air conditioner control system

Abstract

The utility model relates to a fan coil driving device and an air conditioner control system. The device comprises a controller, a power supply module, a first communication module, at least one fan speed regulation module and a power supply switch module, the power supply module is connected with commercial power input and generates power supply voltage. The fan speed regulation module is connected with the controller and the corresponding fan coil, generates a rotating speed feedback signal, inputs the rotating speed feedback signal to the controller and generates a speed regulation signal to be issued to the fan coil; the power supply switch module is connected with the controller and the power supply module and is used for switching on or switching off corresponding power supply of the power supply module to the fan coil; the first communication module is connected with the controller and an upper computer and used for communication between the controller and the upper computer. According to the utility model, the communication module is integrated in the driving device to directly carry out data transmission with the upper computer, so that redundant line connection between equipment can be reduced, and the product layout space is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of air-conditioning control, and more specifically to a fan coil unit driving device and an air-conditioning control system. Background Art

[0002] In air conditioning or HVAC products, fan coil units are key external airflow components. Usually, the working parameters of air conditioning or HVAC equipment need to be achieved by controlling the corresponding working status of the fan coil units. The current conventional fan coil speed regulation method is to control the fan disk driver through a panel controller, but a communication data conversion device needs to be set between the panel controller and the fan disk driver to output the driving signal required by the fan disk driver. That is, in current applications, multiple independent devices need to be connected to achieve the purpose of terminal adjustment of the fan disk speed, and the entire line connection process is relatively complicated. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a fan coil unit driving device and an air conditioning control system in view of the technical defect of the complex line connection in the prior art.

[0004] The technical solution adopted by the utility model to solve the technical problem is: construct a fan coil drive device, including: a controller, a power supply module, a power supply switch module, a first communication module and at least one fan speed control module;

[0005] The power supply module is used to connect to the mains input and generate a power supply voltage;

[0006] The fan speed regulating module is connected to the controller, and is used to connect to the fan coil unit and generate a speed feedback signal according to the fan speed and input it into the controller, and receive the control signal of the controller and generate a corresponding speed regulating signal to be sent to the fan coil unit;

[0007] The power switch module is connected to the controller and the power supply module, and is used to receive a control signal from the controller to turn on or off the power supply from the power supply module to the fan coil unit;

[0008] The first communication module is connected to the controller, and the first communication module is used to connect to a host computer to achieve communication between the controller and the host computer.

[0009] In one embodiment of the utility model, the fan coil unit driving device further includes a second communication module;

[0010] The second communication module is connected to the controller and is used to connect to the first communication module of another fan coil driving device.

[0011] In one embodiment of the utility model, the first communication module and / or the second communication module comprises an RS485 communication unit;

[0012] The RS485 communication unit includes a first connector for connecting an external device, a first signal conditioning circuit, an RS485 chip and a second signal conditioning circuit;

[0013] The first end of the first signal conditioning circuit is connected to the first end of the first connector, the second end of the first signal conditioning circuit is connected to the second end of the first connector, the third end of the first signal conditioning circuit is connected to the sixth pin of the RS485 chip, and the fourth end of the first signal conditioning circuit is connected to the seventh pin of the RS485 chip;

[0014] The first end of the second signal conditioning circuit is connected to the first pin of the RS485 chip, the second end of the second signal conditioning circuit is connected to the fourth pin of the RS485 chip, and the third end and the fourth end of the second signal conditioning circuit are respectively connected to the controller.

[0015] In one embodiment of the utility model, the fan speed control module includes a second connector corresponding to the fan coil unit, a first optocoupler circuit, a first drive switch circuit, and a second optocoupler circuit;

[0016] A first end of the first optocoupler circuit is connected to the power supply module, a second end of the first optocoupler circuit is connected to the sixth pin of the second connector, a third end of the first optocoupler circuit is grounded, and a fourth end of the first optocoupler circuit is connected to the controller;

[0017] The first pin of the second connector and the fourth pin of the second connector are respectively connected to the power supply module;

[0018] The control end of the first drive switch is connected to the controller, the first end of the first drive switch is connected to the second end of the second optocoupler circuit, the second end of the first drive switch is grounded, the first end of the second optocoupler circuit and the fourth end of the second optocoupler circuit are respectively connected to the power supply module, and the third end of the second optocoupler circuit is connected to the fifth pin of the second connector.

[0019] In one embodiment of the utility model, the power switch module includes a third connector for connecting the hot and cold water valves corresponding to the fan coil unit and / or a fourth connector for connecting the drain valve corresponding to the fan coil unit;

[0020] When the power supply switch module includes the third connector, the power supply switch module also includes a first relay, a second drive switch and a first diode; the first pin of the first relay is connected to the second pin of the third connector, the second pin of the first relay is connected to the third pin of the third connector, the fourth pin of the first relay is connected to the first input end of the power supply module, the fifth pin of the first relay is connected to the cathode of the first diode and the power supply module, and the sixth pin of the first relay is connected to the anode of the first diode and the first end of the second drive switch; the second end of the second drive switch is grounded, and the control end of the second drive switch is connected to the controller; the first pin of the third connector is connected to the second input end of the power supply module;

[0021] When the power supply switch module includes the fourth connector, the power supply switch module also includes a second relay, a third drive switch and a second diode; the first pin of the second relay is connected to the first input end of the power supply module, the second pin of the second relay is connected to the first pin of the fourth connector, the third pin of the second relay is connected to the first end of the third drive switch and the anode of the second diode, and the fourth pin of the second relay is connected to the power supply module and the cathode of the second diode; the second end of the third drive switch is grounded, and the control end of the third drive switch is connected to the controller; the third pin of the fourth connector is connected to the second input end of the power supply module.

[0022] In one embodiment of the utility model, the fan coil unit driving device further includes a water level switch detection module;

[0023] The water level switch detection module is connected to the controller, and is used to connect to the water level switch and generate a corresponding switch detection signal according to the state of the water level switch and input the signal to the controller.

[0024] In one embodiment of the utility model, the water level switch detection module comprises: a fifth connector for connecting the float switch corresponding to the fan coil unit and / or a sixth connector for connecting the electrode switch corresponding to the fan coil unit;

[0025] When the water level switch module includes the fifth connector, the water level switch module also includes a first TVS tube and a first operational amplifier circuit; the first input end of the first operational amplifier circuit is connected to the second end of the first TVS tube and the second pin of the fifth connector; the first pin of the fifth connector and the first end of the first TVS tube are grounded, and the output end of the first operational amplifier circuit is connected to the second input end of the first operational amplifier circuit and the controller;

[0026] When the water level switch module includes the sixth connector, the water level switch module also includes a second TVS tube and a second operational amplifier circuit; the first input end of the second operational amplifier circuit is connected to the second end of the second TVS tube and the second pin of the sixth connector; the first pin of the sixth connector and the first end of the second TVS tube are grounded, and the output end of the second operational amplifier circuit is connected to the second input end of the second operational amplifier circuit and the controller.

[0027] In one embodiment of the utility model, the power supply module includes a seventh connector, a first voltage conversion circuit, a second voltage conversion circuit, a third voltage conversion circuit and a fourth voltage conversion circuit;

[0028] The first pin of the seventh connector and the second pin of the seventh connector are mains input terminals of the power supply module;

[0029] The third pin of the seventh connector and the fourth pin of the seventh connector are electrically connected to the first pin of the seventh connector and the second pin of the seventh connector to serve as the mains power output end of the power supply module;

[0030] The first voltage conversion circuit is connected to the first pin of the seventh connector, the second pin of the seventh connector and the fan speed regulating module, and is used to output a first power supply voltage to power the fan corresponding to the fan coil unit through the fan speed regulating module;

[0031] The second voltage conversion circuit is connected to the first voltage conversion circuit and the fan speed control module, and is used to generate a second power supply voltage to power the fan speed control module;

[0032] The third voltage conversion circuit is connected to the second voltage conversion circuit and the first communication module, and is used to generate a third power supply voltage for the first communication module;

[0033] The fourth voltage conversion circuit is connected to the third voltage conversion circuit, the first communication module, the fan speed regulation module, the controller, and the power supply switch module, and is used to generate a fourth power supply voltage to power the first communication module, the fan speed regulation module, the controller, and the power supply switch module.

[0034] In one embodiment of the utility model, the fan coil unit driving device further comprises: one or more of a debugging interface module, a data download interface module and an address setting module;

[0035] The debugging interface module is connected to the controller to realize debugging data transmission;

[0036] The data download interface module is connected to the controller and is used for data downloading of the controller;

[0037] The address setting module is connected to the controller and is used to set the address information of the fan coil unit driving device.

[0038] The utility model also constructs an air-conditioning control system, comprising: a host computer and the fan coil unit driving device as described above, wherein the host computer is directly or indirectly connected to the fan coil unit driving device.

[0039] The implementation of the fan coil unit drive device and air conditioning control system of the utility model has the following beneficial effects: by integrating a communication module in the drive device to directly transmit data with a host computer, redundant line connections between different devices can be reduced, saving product layout space. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0041] Figure 1 This is a logic block diagram of an embodiment of the fan coil unit driving device of the utility model;

[0042] Figure 2 It is a logic block diagram of another embodiment of the fan coil unit driving device of the utility model;

[0043] Figure 3 It is a logic block diagram of another embodiment of the fan coil unit driving device of the utility model;

[0044] Figure 4 This is a partial circuit schematic diagram of an embodiment of the fan coil unit driving device of the utility model;

[0045] Figure 5 It is a partial circuit principle diagram of another embodiment of the fan coil unit driving device of the utility model;

[0046] Figure 6 This is a partial circuit schematic diagram of another embodiment of the fan coil unit driving device of the utility model;

[0047] Figure 7 This is a partial circuit schematic diagram of another embodiment of the fan coil unit driving device of the utility model;

[0048] Figure 8 This is a partial circuit schematic diagram of another embodiment of the fan coil unit driving device of the utility model. DETAILED DESCRIPTION

[0049] In order to have a clearer understanding of the technical features, purposes and effects of the present utility model, the specific implementation methods of the present utility model are now described in detail with reference to the accompanying drawings.

[0050] like Figure 1FIG. 1 shows an embodiment of a fan coil unit driving device 100 of the present invention. Figure 1 The fan coil drive device 100 of the utility model shown includes: a controller 110, a power supply module 120, a first communication module 130 and at least one fan speed regulation module 140, and a power switch module 150; the power supply module 120 is used to connect to the AC input and generate a power supply voltage; the fan speed regulation module 140 is connected to the controller 110 and the fan coil, and is used to generate a speed feedback signal according to the fan speed and input it to the controller 110, and is used to receive the control signal of the controller 110 and generate a corresponding speed regulation signal to be sent to the fan coil; the power switch module 150 is connected to the controller 110 and the power supply module 120, and is used to receive the control signal of the controller 110 to turn on or off the corresponding power supply of the power supply module 120 to the fan coil; the first communication module 130 is connected to the controller 110 and to the host computer, and is used to realize communication between the controller 110 and the host computer.

[0051] Specifically, in the fan coil drive device 100, the controller 110 is connected to the host computer through the first communication module 130 to realize the communication between the fan coil drive device 100 and the host computer. Among them, the controller 110 is composed of an MCU chip and corresponding peripheral circuits, which are used to realize the signal reception and signal output process. Among them, the first communication module 130 can be directly or indirectly connected to the host computer to realize the communication with the host computer. The process of the controller 110 receiving and sending signals can be realized according to the current existing signal processing process. The power supply module 120 is connected to the mains input, and the mains input is converted to generate the power supply voltage required for the operation of the drive device. The fan speed control module 140 obtains the fan speed information through the fan working circuit corresponding to the fan coil and generates a speed feedback signal to input to the controller 110. At the same time, the fan speed control module 140 also generates a corresponding speed control signal according to the control signal output by the controller 110, and inputs the speed control signal to the fan working circuit corresponding to the fan coil, so that the fan working circuit adjusts the fan speed according to the speed control signal. In one embodiment, there may be multiple groups of corresponding fans in the fan coil. Therefore, multiple fan speed control modules 140 may be provided, each fan speed control module 140 is used to obtain the corresponding fan working circuit to obtain the fan speed information, and is used to output a speed control signal to the corresponding fan working circuit. The power supply switch module 150 is used to control the power supply process to some working circuits in the fan coil. In the specific working process, the power supply switch module 150 generates a drive level through the controller 110, and implements the corresponding on or off process according to the drive level.

[0052] The power switch module 150 is disposed in the fan coil unit driving device 100 to implement a control process of a working circuit corresponding to the fan coil unit.

[0053] like Figure 2 and Figure 3 As shown, in the fan coil unit drive device 100 of the present invention, a second communication module 170 is further included, and the second communication module 170 is connected to the controller 110 and is used to connect to the first communication module 130 of another fan coil unit drive device 100. That is, in the fan coil unit drive device 100, a cascade relationship with other fan coil unit drive devices 100 can be established through the second communication module 170. When there are multiple fan coil unit drive devices 100, the first communication module 130 of each level of the fan coil unit drive device 100 is connected to the second communication module 170 of the fan coil unit drive device 100 of the previous level, and the first communication module 130 of the fan coil unit drive device 100 of the upper level is connected to the host computer, and each fan coil unit drive device 100 can be set with corresponding address information, and the host computer can perform data transmission with the corresponding fan coil unit drive device 100 through the cascade link according to the address information.

[0054] like Figure 4 As shown, in a specific embodiment, the first communication module 130 and the second communication module 170 include but are not limited to RS485 communication units. The RS485 communication unit includes a first connector for connecting an external device, as well as a first signal conditioning circuit, an RS485 chip, and a second signal conditioning circuit; the first end of the first signal conditioning circuit is connected to the first end of the first connector, the second end of the first signal conditioning circuit is connected to the second end of the first connector, the third end of the first signal conditioning circuit is connected to the sixth pin of the RS485 chip, and the fourth end of the first signal conditioning circuit is connected to the seventh pin of the RS485 chip; the first end of the second signal conditioning circuit is connected to the first pin of the RS485 chip, the second end of the second signal conditioning circuit is connected to the fourth pin of the RS485 chip, and the third end and fourth end of the second signal conditioning circuit are respectively connected to the controller 110. As shown Figure 4 As shown, in a specific embodiment, taking one of the first communication module 130 and the second communication module 170 as an example, the RS485 communication unit includes an RS485 chip U7 and a connector J10 (corresponding to the first connector), and the connector J10 is used to connect to an upper-level device, which includes but is not limited to a host computer, and the communication data between the connector J10 and the RS485 chip U7 is conditioned by a first signal conditioning circuit. The communication data between the RS485 chip U7 and the controller 110 is conditioned by a second signal conditioning circuit.

[0055] Among them, the first signal conditioning circuit may include a bidirectional TVS tube TVS4, a bidirectional TVS tube TVS3, a bidirectional TVS tube TVS5, a resistor R26, a resistor R27, a resistor R24 ​​and a resistor R28. The first end of the resistor R26 constitutes the second end of the first signal conditioning circuit, and the first end of the resistor R27 constitutes the first end of the first signal conditioning circuit. The second end of the resistor R26 is connected to the seventh pin of the RS485 chip U7, the first end of the resistor R28, the second end of the bidirectional TVS tube TVS4 and the first end of the bidirectional TVS tube TVS3. The second end of the resistor R27 is connected to the sixth pin of the RS485 chip U7, the first end of the resistor R24, the second end of the bidirectional TVS tube TVS3 and the first end of the bidirectional TVS tube TVS5. The second end of the resistor R28 and the second end of the resistor R26 are connected to the seventh pin of the RS485 chip U7, the first end of the resistor R28, the first end of the bidirectional TVS tube TVS4 and the second end of the bidirectional TVS tube TVS5 are grounded. The second end of the resistor R24 ​​is connected to the power supply module 120 for receiving a 5V power supply voltage. In one embodiment, the first signal conditioning circuit further includes a switch SW2 and a resistor R25, wherein the first end of the switch SW2 is connected to the sixth pin of the RS485 chip U7 via the resistor R25, and the second end of the switch SW2 is connected to the seventh pin of the RS485 chip U7. The switch SW2 is used to adjust the matching impedance of the RS485 chip U7.

[0056] The second signal conditioning circuit may include a resistor R31, a resistor R32, a resistor R33, a resistor R34, a MOS transistor Q5, a MOS transistor Q4, a resistor R37, and a resistor R38. The first pin of the RS485 chip U7 is connected to the first end of the resistor R31, the second end of the resistor R31 is connected to the first end of the resistor R33 and the drain of the MOS transistor Q5, the source of the MOS transistor Q5 is connected to the first end of the resistor R37 and serves as the third end of the second signal conditioning circuit. The fourth pin of the RS485 chip U7 is connected to the first end of the resistor R32, the second end of the resistor R32 is connected to the first end of the resistor R34 and the drain of the MOS transistor Q4, the source of the MOS transistor Q4 is connected to the first end of the resistor R38 and serves as the fourth end of the second signal conditioning circuit. The gate of the MOS transistor Q4, the gate of the MOS transistor Q5, the second end of the resistor R37, and the second end of the resistor R38 are connected to the power supply module 120 for inputting a 3.3V voltage. The second end of the resistor R33 and the second end of the resistor R34 are connected to the power supply module 120 for inputting a 5V voltage.

[0057] like Figure 5As shown, in one embodiment, the fan speed control module 140 includes a second connector corresponding to the fan coil unit, as well as a first optocoupler circuit, a first drive switch circuit and a second optocoupler circuit; the first end of the first optocoupler circuit is connected to the power supply module 120, the second end of the first optocoupler circuit is connected to the sixth pin of the second connector, the third end of the first optocoupler circuit is grounded, and the fourth end of the first optocoupler circuit is connected to the controller 110; the first pin of the second connector and the fourth pin of the second connector are respectively connected to the power supply module 120; the control end of the first drive switch is connected to the controller 110, the first end of the first drive switch is connected to the second end of the second optocoupler circuit, the second end of the first drive switch is grounded, the first end of the second optocoupler circuit and the fourth end of the second optocoupler circuit are respectively connected to the power supply module 120, and the third end of the second optocoupler circuit is connected to the fifth pin of the second connector.

[0058] In a fan speed control module 140, the second connector includes J1, and the connector J1 is used to connect the fan working circuit. The first optocoupler circuit generates a corresponding feedback signal based on the received fan speed information and inputs it to the controller 110. The first drive switch drives the second optocoupler circuit to operate according to the received control signal to generate a corresponding speed control signal and input it to the fan working circuit through the fifth pin of the connector J1. In a specific embodiment, the first optocoupler circuit includes an optocoupler chip and its peripheral circuits. In a specific embodiment, the first optocoupler circuit includes an optocoupler chip U9, and the corresponding peripheral circuits include but are not limited to resistor R8, capacitor C39, resistor R9, capacitor C40 and resistor R29. The second pin of the optocoupler chip U9 is connected to the first end of the capacitor C39 and the first end of the resistor R8, and the second end of the resistor R8 is connected to the sixth pin of the connector J1; the third pin of the optocoupler chip U9 is connected to the power supply module 120, for inputting a power supply voltage including but not limited to 15V; the fourth pin of the optocoupler chip U9 is connected to the first end of the resistor R9, the first end of the capacitor C40 and the first end of the resistor R29; the second end of the resistor R9 is connected to the power supply module 120, for inputting a power supply voltage including but not limited to 3.3V; the second end of the resistor R29 is connected to the controller 110. The second end of the capacitor C39, the third pin of the optocoupler chip U9, and the second end of the capacitor C40 are grounded.

[0059] Optionally, the second optocoupler circuit includes an optocoupler chip and its peripheral circuits. In a specific embodiment, the second optocoupler circuit includes an optocoupler chip U3, and the corresponding peripheral circuits include but are not limited to resistor R80, capacitor C45, TVS tube D6, resistor R78, resistor R76 and resistor R5. The third pin of the optocoupler chip U3 is connected to the first end of the resistor R78, the cathode of the TVS tube D6, the first end of the capacitor C45 and the first end of the resistor R80, and the second end of the resistor R80 is connected to the fifth pin of the connector J1; the fourth pin of the optocoupler chip U3 is connected to the power supply module 120 via the resistor R76, for inputting a power supply voltage including but not limited to 15V; the first pin of the optocoupler chip U3 is connected to the power supply module 120 via the resistor R5, for inputting a power supply voltage including but not limited to 3.3V; the second pin of the optocoupler chip U3 is connected to the first end of the first drive switch; the second end of the resistor R78, the anode of the TVS tube D6, and the second end of the capacitor C45 are all grounded.

[0060] Optionally, the first drive switch includes a switch tube and its peripheral circuits. In a specific embodiment, the first drive switch includes a transistor Q10, and the corresponding peripheral circuits include but are not limited to resistors R59 and R58. The base of the transistor Q10 is connected to the first end of the resistor R59 and the first end of the resistor R58, the second end of the resistor R59 is connected to the controller 110, and the collector of the transistor Q10 serves as the first end of the first drive switch; the emitter of the transistor Q10 and the second end of the resistor R58 are grounded.

[0061] like Figure 3 and Figure 6As shown, in one embodiment, the power switch module 150 includes a first power switch module 151 for controlling the hot and cold water valves, the first power switch module 151 includes a third connector for connecting the hot and cold water valves corresponding to the fan coil unit, as well as a first relay, a second drive switch and a first diode; the first pin of the first relay is connected to the second pin of the third connector, the second pin of the first relay is connected to the third pin of the third connector, the fourth pin of the first relay is connected to the first input end of the power supply module 120, the fifth pin of the first relay is connected to the cathode of the first diode and the power supply module 120, the sixth pin of the first relay is connected to the anode of the first diode and the first end of the second drive switch; the second end of the second drive switch is grounded, and the control end of the second drive switch is connected to the controller 110; the first pin of the third connector is connected to the second input end of the power supply module 120. Among them, the third connector includes a connector J6, and the connector J6 is used to connect the hot and cold water valves corresponding to the fan coil unit. The first relay includes a relay K1, and the first diode includes a diode D4. The first pin and the second pin of the relay K1 are connected to the second pin and the third pin of the connector J6 respectively, the fifth pin of the relay K1 is connected to the cathode of the diode D4 and the power supply module 120, and is used to input a power supply voltage including but not limited to 5V, the sixth pin of the relay K1 is connected to the anode of the diode D4 and the first end of the second drive switch, and the fifth pin and the sixth pin of the relay K1 are turned on and powered on by the output of the second drive switch, and then the fourth pin of the relay K1 is controlled to be turned on with its first pin or the second pin, that is, the power input of the fourth pin of the relay K1 is realized to supply power to the corresponding pin of the connector J6, that is, to realize the power supply to the corresponding hot and cold water valve. Among them, the fourth pin of the relay K1 can be connected to the L line input of the mains input through the fuse F2. The first pin of the connector J6 is used to connect the N line input of the mains input. The input can be introduced through the mains input end of the power supply module 120.

[0062] Optionally, the second drive switch includes a switch tube and its peripheral circuits. In a specific embodiment, the second drive switch includes a transistor Q1, and the corresponding peripheral circuits include but are not limited to resistors R22 and R23. The base of the transistor Q1 is connected to the first end of the resistor R22 and the first end of the resistor R23, the second end of the resistor R22 is connected to the controller 110, and the collector of the transistor Q1 serves as the first end of the second drive switch; the emitter of the transistor Q1 and the second end of the resistor R23 are grounded.

[0063] like Figure 3 and Figure 6As shown, in one embodiment, the power switch module 150 includes a second power switch module 152 for controlling the drain valve, the second power switch module 152 includes a fourth connector for connecting the drain valve corresponding to the fan coil unit, as well as a second relay, a third drive switch and a second diode; the first pin of the second relay is connected to the first input end of the power supply module 120, the second pin of the second relay is connected to the first pin of the fourth connector, the third pin of the second relay is connected to the first end of the third drive switch and the anode of the second diode, and the fourth pin of the second relay is connected to the power supply module 120 and the cathode of the second diode; the second end of the third drive switch is grounded, and the control end of the third drive switch is connected to the controller 110; the third pin of the fourth connector is connected to the second input end of the power supply module 120. Among them, the fourth connector includes a connector J7, and the connector J7 is used to connect the drain valve corresponding to the fan coil unit. The second relay includes a relay K2, and the second diode includes a diode D1. The second pin of relay K2 is connected to the first pin of connector J7, the fourth pin of relay K2 is connected to the cathode of diode D1 and power supply module 120, and is used to input a power supply voltage including but not limited to 5V, the third pin of relay K2 is connected to the anode of diode D1 and the first end of the second drive switch, and the third pin and the fourth pin of relay K2 are turned on and powered on by the output of the second drive switch, and then the first pin of relay K2 is controlled to be turned on with the second pin, that is, the power input of the first pin of relay K2 is realized to power the corresponding pin of connector J7, even if the corresponding drain valve is powered. Among them, the first pin of relay K2 can be connected to the L line input of the mains input through fuse F2. The third pin of connector J7 is used to connect the N line input of the mains input. The input can be introduced through the mains input end of the power supply module 120.

[0064] like Figure 2 and Figure 3 As shown, in the fan coil unit driving device 100 of the utility model, a water level switch detection module 160 is also included. The water level switch detection module 160 is connected to the water level switch and the controller 110, and is used to generate a corresponding switch detection signal according to the state of the water level switch and input it to the controller 110. Specifically, the water level switch detection module 160 is connected to the water level switch, and is used to obtain a corresponding detection result according to the state of the water level switch, that is, to obtain a switch detection signal, and input it to the controller 110, so that the controller 110 obtains the state of the water level switch and performs corresponding operations when necessary. Among them, the water level switch detection module 160 is set in the fan coil unit driving device 100 to realize the detection process of the corresponding working circuit of the fan coil unit.

[0065] Optional, such as Figure 3 and Figure 7As shown, the water level switch detection module 160 includes: a fifth connector for connecting the float switch corresponding to the fan coil unit and / or a sixth connector for connecting the electrode switch corresponding to the fan coil unit; when the water level switch module includes the fifth connector, the water level switch module also includes a first TVS tube and a first operational amplifier circuit; the first input end of the first operational amplifier circuit is connected to the second end of the first TVS tube and the second pin of the fifth connector; the first pin of the fifth connector and the first end of the first TVS tube are grounded, and the output end of the first operational amplifier circuit is connected to the second input end of the first operational amplifier circuit and the controller 110; when the water level switch module includes the sixth connector, the water level switch module also includes a second TVS tube and a second operational amplifier circuit; the first input end of the second operational amplifier circuit is connected to the second end of the second TVS tube and the second pin of the sixth connector; the first pin of the sixth connector and the first end of the second TVS tube are grounded, and the output end of the second operational amplifier circuit is connected to the second input end of the second operational amplifier circuit and the controller 110.

[0066] In one embodiment, the water level switch can be a float switch. The water level switch detection module 160 includes a first water level switch detection module 161 for connecting the float switch, and a fifth connector can be provided in the first water level switch detection module 161 to connect the float switch. Correspondingly, a first TVS tube and a first operational amplifier circuit can be provided. The first TVS tube includes but is not limited to a bidirectional TVS tube TVS1, and the first operational amplifier circuit includes an operational amplifier chip and its corresponding peripheral circuit. In a specific embodiment, the fifth connector includes a connector J8, the first operational amplifier circuit includes an operational amplifier chip U14B, and the corresponding peripheral circuit includes but is not limited to a resistor R91, a TVS tube D10, a resistor R89, a resistor R90, a capacitor C22, a resistor R13, a resistor R7, a capacitor C13 and a resistor R6. The fifth pin of the operational amplifier chip U14B is connected to the first end of the capacitor C22, the first end of the resistor R90, the first end of the resistor R89, the cathode of the TVS tube D10 and the first end of the resistor R91, and the sixth pin of the operational amplifier chip U14B is connected to the seventh pin of the operational amplifier chip U14B and the first end of the resistor R13. The second end of the resistor R91 is connected to the second pin of the connector J8 and the second end of the bidirectional TVS tube TVS1, and the first end of the bidirectional TVS tube TVS1 and the first pin of the connector J8 are grounded. In addition, the second pin of the connector J8 is also connected to the first end of the capacitor C13, the first end of the resistor R7 and the first end of the resistor R6. The connector J8 is used to connect the float water level monitoring sensor circuit to obtain the corresponding detection signal. The second end of the resistor R13 is connected to the second end of the resistor R6 and the controller 110 as the output end of the first operational amplifier circuit, the second end of the capacitor C22, the second end of the resistor R90, the anode of the TVS tube D10 and the second end of the capacitor C13 are grounded, the second end of the resistor R7 is connected to the power supply module 120, and is used to input a power supply voltage including but not limited to 3.3V, and the second end of the resistor R89 ​​is connected to the power supply module 120, and is used to input a power supply voltage including but not limited to 5V.

[0067] In one embodiment, the water level switch can be an electrode switch. The water level switch detection module 160 includes a second water level switch detection module 162 for connecting the electrode switch, and a sixth connector can be set in the first water level switch detection module 162 to connect the electrode switch. Correspondingly, a second TVS tube and a second op amp circuit can be set. The second TVS tube includes but is not limited to a bidirectional TVS tube TVS2, and the second op amp circuit includes an op amp chip and its corresponding peripheral circuit. In a specific embodiment, the sixth connector includes a connector J9, the second op amp circuit includes an op amp chip U14A, and the corresponding peripheral circuit includes but is not limited to a resistor R88, a TVS tube D9, a resistor R86, a resistor R87, a capacitor C10, a resistor R12, a resistor R14, a capacitor C12 and a resistor R16. The third pin of the op amp chip U14A is connected to the first end of the capacitor C10, the first end of the resistor R86, the first end of the resistor R87, the cathode of the TVS tube D9 and the first end of the resistor R88, and the second pin of the op amp chip U14A is connected to the first pin of the op amp chip U14A and the first end of the resistor R12. The second end of the resistor R88 is connected to the second pin of the connector J9 and the second end of the bidirectional TVS tube TVS2, and the first end of the bidirectional TVS tube TVS2 and the first pin of the connector J9 are grounded. In addition, the second pin of the connector J9 is also connected to the first end of the capacitor C12, the first end of the resistor R14 and the first end of the resistor R16. The connector J9 is used to connect the electrode water level monitoring sensor circuit to obtain a corresponding detection signal. The second end of the resistor R12 is connected to the second end of the resistor R16 and the controller 110 as the output end of the second operational amplifier circuit, the second end of the capacitor C10, the second end of the resistor R87, the anode of the TVS tube D9 and the second end of the capacitor C12 are grounded, the second end of the resistor R14 is connected to the power supply module 120, and is used to input a power supply voltage including but not limited to 3.3V, and the second end of the resistor R86 is connected to the power supply module 120, and is used to input a power supply voltage including but not limited to 5V.

[0068] Optional, such as Figure 8As shown, the power supply module 120 includes a seventh connector, a first voltage conversion circuit 121, a second voltage conversion circuit (not shown separately in the figure), a third voltage conversion circuit 123 and a fourth voltage conversion circuit 124; the first pin of the seventh connector and the second pin of the seventh connector are the AC input end of the power supply module 120; the third pin of the seventh connector and the fourth pin of the seventh connector are electrically connected to the first pin of the seventh connector and the second pin of the seventh connector correspondingly, so as to serve as the AC output end of the power supply module 120; the first voltage conversion circuit 121 is connected to the first pin of the seventh connector, the second pin of the seventh connector and the fan speed control module 140, and is used to output a first supply voltage to pass through the fan speed control module 14 0 supplies power to the fan corresponding to the fan coil unit; the second voltage conversion circuit is connected to the first voltage conversion circuit 121 and the fan speed regulation module 140, and is used to generate a second power supply voltage to supply power to the fan speed regulation module 140; the third voltage conversion circuit 123 is connected to the second voltage conversion circuit and the first communication module 130, and is used to generate a third power supply voltage to supply power to the first communication module 130; the fourth voltage conversion circuit 124 is connected to the third voltage conversion circuit 123, the fan speed regulation module 140, the controller 110, the power supply switch module 150 and the water level switch detection module 160, and is used to generate a fourth power supply voltage to supply power to the fan speed regulation module 140, the controller 110, the power supply switch module 150 and the water level switch detection module 160.

[0069] In a specific embodiment, the seventh connector includes a connector J5, a pair of pins of the connector J5 are used as the AC power input of the power supply module 120, and are used to connect the external AC power input; another pair of pins of the connector J5 are electrically connected to the AC power input of the power supply module 120, and are used to provide AC power output to external devices.

[0070] In a specific embodiment, the first voltage conversion circuit 121 is used to convert the mains input to obtain a first power supply voltage including but not limited to 310 V. The first power supply voltage is used to power the fan speed control module 140. The first power supply voltage can be input to the fan circuit corresponding to the fan coil unit through the connector in the fan speed control module 140.

[0071] In a specific embodiment, the second voltage conversion circuit is connected to the first voltage conversion circuit 121, and performs voltage conversion on the output of the first voltage conversion circuit 121 to obtain a second power supply voltage including but not limited to 15V. The second power supply voltage is used to power the fan speed control module 140. The second power supply voltage can be input to the fan circuit corresponding to the fan coil unit through the connector in the fan speed control module 140. At the same time, it can also be used to power the relay circuit in the fan speed control module 140.

[0072] In a specific embodiment, the third voltage conversion circuit 123 is connected to the second voltage conversion circuit, and performs voltage conversion on the output of the second voltage conversion circuit to obtain a third power supply voltage including but not limited to 5 V. The third power supply voltage is used to power the first communication module 130 and the second communication module 170. That is, it can power the RS485 chip and peripheral circuits.

[0073] In a specific embodiment, the fourth voltage conversion circuit 124 is connected to the third voltage conversion circuit 123, and performs voltage conversion on the output of the third voltage conversion circuit 123 to obtain a fourth power supply voltage including but not limited to 3.3 V. The fourth power supply voltage provides 3.3 V power supply to the required circuits in the fan coil unit driving device 100.

[0074] Optionally, in one embodiment, as Figure 3 The fan coil unit driving device 100 of the utility model further includes: one or more of a debugging interface module 181, a data downloading interface module 182 and an address setting module 183; the debugging interface module 181 is connected to the controller 110 to realize debugging data transmission; the data downloading interface module is connected to the controller 110 to download data of the controller 110; the address setting module 183 is connected to the controller 110 to set the address information of the fan coil unit driving device 100. That is, in the fan coil unit driving device 100, an adjustment interface module can be set to provide an access interface for the debugging device. The data downloading interface module 182 can be set to provide a data downloading interface to realize the downloading function of the controller 110 data. The address setting module 183 is provided or an address setting interface is provided to realize the setting or storage of the address information of the device.

[0075] In the above fan coil unit drive device 100, all functional modules can be arranged in the same housing, and only external interfaces are arranged for easy connection and use. It can support electrode-type water level detection or float-type water level switch detection modules, support external drainage pumps and lifting pump drainage, support hot and cold two-way valve control, and further enrich the product functions of the fan coil unit drive.

[0076] In addition, an air conditioning control system of the utility model includes: a host computer and a fan coil unit driving device 100 thereon, and the host computer is directly or indirectly connected to the fan coil unit driving device 100. That is, the fan coil unit driving device 100 can be set to correspond to the functional module or functional interface corresponding to the air conditioning equipment, and the host computer and the fan coil unit driving device 100 are connected in communication to generate control instructions or obtain feedback data, so as to finally realize the control process of the corresponding air conditioning system.

[0077] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the utility model. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should belong to the scope covered by the claims of the utility model.

Claims

1. A fan coil unit driving device, characterized in that: include: A controller, a power supply module, a power switch module, a first communication module and at least one fan speed control module; The power supply module is used to connect to the mains input and generate a power supply voltage; The fan speed regulating module is connected to the controller, and is used to connect to the fan coil unit and generate a speed feedback signal according to the fan speed and input it into the controller, and is used to receive the control signal of the controller and generate a corresponding speed regulating signal to be sent to the fan coil unit; The power switch module is connected to the controller and the power supply module, and is used to receive a control signal from the controller to turn on or off the power supply from the power supply module to the fan coil unit; The first communication module is connected to the controller, and the first communication module is used to connect to a host computer to achieve communication between the controller and the host computer.

2. The fan coil unit driving device according to claim 1, characterized in that: Also comprising a second communication module; The second communication module is connected to the controller and is used to connect to the first communication module of another fan coil driving device.

3. The fan coil unit driving device according to claim 2, characterized in that: The first communication module and / or the second communication module comprises an RS485 communication unit; The RS485 communication unit includes a first connector for connecting an external device, a first signal conditioning circuit, an RS485 chip and a second signal conditioning circuit; The first end of the first signal conditioning circuit is connected to the first end of the first connector, the second end of the first signal conditioning circuit is connected to the second end of the first connector, the third end of the first signal conditioning circuit is connected to the sixth pin of the RS485 chip, and the fourth end of the first signal conditioning circuit is connected to the seventh pin of the RS485 chip; The first end of the second signal conditioning circuit is connected to the first pin of the RS485 chip, the second end of the second signal conditioning circuit is connected to the fourth pin of the RS485 chip, and the third end and the fourth end of the second signal conditioning circuit are respectively connected to the controller.

4. The fan coil unit driving device according to claim 1, characterized in that: The fan speed control module includes a second connector corresponding to the fan coil unit, a first optocoupler circuit, a first drive switch circuit, and a second optocoupler circuit; A first end of the first optocoupler circuit is connected to the power supply module, a second end of the first optocoupler circuit is connected to the sixth pin of the second connector, a third end of the first optocoupler circuit is grounded, and a fourth end of the first optocoupler circuit is connected to the controller; The first pin of the second connector and the fourth pin of the second connector are respectively connected to the power supply module; The control end of the first drive switch is connected to the controller, the first end of the first drive switch is connected to the second end of the second optocoupler circuit, the second end of the first drive switch is grounded, the first end of the second optocoupler circuit and the fourth end of the second optocoupler circuit are respectively connected to the power supply module, and the third end of the second optocoupler circuit is connected to the fifth pin of the second connector.

5. The fan coil unit driving device according to claim 1, characterized in that: The power switch module includes a third connector for connecting the hot and cold water valves corresponding to the fan coil unit and / or a fourth connector for connecting the drain valve corresponding to the fan coil unit; When the power switch module includes the third connector, the power switch module further includes a first relay, a second drive switch and a first diode; a first pin of the first relay is connected to the second pin of the third connector, a second pin of the first relay is connected to the third pin of the third connector, a fourth pin of the first relay is connected to the first input end of the power supply module, a fifth pin of the first relay is connected to the cathode of the first diode and the power supply module, and a sixth pin of the first relay is connected to the anode of the first diode and the first end of the second drive switch; The second end of the second driving switch is grounded, and the control end of the second driving switch is connected to the controller; the first pin of the third connector is connected to the second input end of the power supply module; When the power supply switch module includes the fourth connector, the power supply switch module further includes a second relay, a third drive switch and a second diode; a first pin of the second relay is connected to the first input end of the power supply module, a second pin of the second relay is connected to the first pin of the fourth connector, a third pin of the second relay is connected to the first end of the third drive switch and the anode of the second diode, and a fourth pin of the second relay is connected to the power supply module and the cathode of the second diode; The second end of the third driving switch is grounded, and the control end of the third driving switch is connected to the controller; the third pin of the fourth connector is connected to the second input end of the power supply module.

6. The fan coil unit driving device according to claim 1, characterized in that: Also includes a water level switch detection module; The water level switch detection module is connected to the controller, and is used to connect to the water level switch and generate a corresponding switch detection signal according to the state of the water level switch and input the signal to the controller.

7. The fan coil unit driving device according to claim 6, characterized in that: The water level switch detection module comprises: a fifth connector for connecting the float switch corresponding to the fan coil unit and / or a sixth connector for connecting the electrode switch corresponding to the fan coil unit; When the water level switch module includes the fifth connector, the water level switch module also includes a first TVS tube and a first operational amplifier circuit; the first input end of the first operational amplifier circuit is connected to the second end of the first TVS tube and the second pin of the fifth connector; the first pin of the fifth connector and the first end of the first TVS tube are grounded, and the output end of the first operational amplifier circuit is connected to the second input end of the first operational amplifier circuit and the controller; When the water level switch module includes the sixth connector, the water level switch module also includes a second TVS tube and a second operational amplifier circuit; the first input end of the second operational amplifier circuit is connected to the second end of the second TVS tube and the second pin of the sixth connector; the first pin of the sixth connector and the first end of the second TVS tube are grounded, and the output end of the second operational amplifier circuit is connected to the second input end of the second operational amplifier circuit and the controller.

8. The fan coil unit driving device according to claim 1, characterized in that: The power supply module includes a seventh connector, a first voltage conversion circuit, a second voltage conversion circuit, a third voltage conversion circuit and a fourth voltage conversion circuit; The first pin of the seventh connector and the second pin of the seventh connector are mains input terminals of the power supply module; The third pin of the seventh connector and the fourth pin of the seventh connector are electrically connected to the first pin of the seventh connector and the second pin of the seventh connector to serve as the mains power output end of the power supply module; The first voltage conversion circuit is connected to the first pin of the seventh connector, the second pin of the seventh connector and the fan speed regulating module, and is used to output a first power supply voltage to power the fan corresponding to the fan coil unit through the fan speed regulating module; The second voltage conversion circuit is connected to the first voltage conversion circuit and the fan speed control module, and is used to generate a second power supply voltage to power the fan speed control module; The third voltage conversion circuit is connected to the second voltage conversion circuit and the first communication module, and is used to generate a third power supply voltage for the first communication module; The fourth voltage conversion circuit is connected to the third voltage conversion circuit, the first communication module, the fan speed regulation module, the controller, and the power supply switch module, and is used to generate a fourth power supply voltage to power the first communication module, the fan speed regulation module, the controller, and the power supply switch module.

9. The fan coil unit driving device according to claim 1, characterized in that: Also includes: One or more of a debugging interface module, a data downloading interface module, and an address setting module; The debugging interface module is connected to the controller to realize debugging data transmission; The data download interface module is connected to the controller and is used for data downloading of the controller; The address setting module is connected to the controller and is used to set the address information of the fan coil unit driving device.

10. An air conditioning control system, characterized in that: include: A host computer and a fan coil unit driving device as claimed in any one of claims 1 to 9, wherein the host computer is connected to the fan coil unit driving device.

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