A control system for a radome air conditioning system

Abstract

The present invention discloses a control system for an radome air conditioning system, comprising a control mainboard AP1, an operation panel AP2, a frequency conversion board AP3, a module board AP4, a power supply part, a signal detection part, and an electrical drive part. The control mainboard AP1 is connected to the operation panel AP2 and the frequency conversion board AP3, and the frequency conversion board AP3 is connected to the module board AP4; the power supply part introduces a three-phase live wire and a neutral wire and supplies power to other power-consuming units, the signal detection part detects the temperature data of the radome air conditioning system, and the electrical drive part is used to drive the air conditioning part to work. The present invention can automatically detect and control the temperature, humidity, and flow rate of the air in the radome, and is provided with protection functions such as power supply anomaly, system pressure, module overheating, high compressor exhaust temperature, heating, and antifreeze; the high-voltage DC frequency conversion technology is adopted to ensure that the antenna works continuously and uninterruptedly around the clock.

Description

Technical Field

[0001] The invention relates to the field of radar antenna air conditioning control systems, in particular to a control system for a radome air conditioning system. Background Art

[0002] The radome is mainly used to protect the radar antenna and ensure the continuous and uninterrupted operation of the antenna under various environmental conditions. Structural strength, radio wave transmission performance and air quality are the main indicators of the radome. The ground radar radome mainly uses microwave frequency bands, such as L, S, C, and X bands.

[0003] In order to ensure that the antenna inside the radome works uninterruptedly 24 hours a day, the radome air conditioning system often adopts a dual-system structure. The two systems work alternately, one in use and one in backup. When one system is abnormal, it automatically switches to the other system. However, the dual system is larger in size and heavier in weight than a single system, which does not meet the use requirements of a small radome.

[0004] Small antenna covers are often equipped with two single-system air conditioning systems. The two air conditioning systems work alternately, one in use and one in standby, automatically adjusting the temperature, humidity and flow rate of the air in the antenna cover to meet the antenna's all-weather continuous and uninterrupted working requirements.

[0005] Therefore, it is necessary to invent a control system that can automatically detect and control the temperature, humidity and flow rate of the air in the antenna cover; communicate with the host computer to automatically report the temperature, humidity, air flow rate of the air in the antenna cover and the working status and fault information of the air conditioning system; at the same time, when one set of antenna cover air conditioning systems arranged in parallel is abnormal, the host computer can immediately start another set of antenna cover air conditioning system to work. Summary of the invention

[0006] The purpose of the present invention is to provide a radome air conditioning system to remedy the defects of the prior art.

[0007] The control system uses intelligent and reliable control system technology to ensure the temperature, humidity and flow rate of the air in the antenna cover, ensuring the continuous and uninterrupted operation of the antenna under various environmental conditions.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is:

[0009] A control system for a radome air conditioning system, characterized in that it includes a control main board AP1, an operation panel AP2, a frequency conversion board AP3, a module board AP4, a power supply part, a signal detection part, and an electrical drive part, wherein:

[0010] The control main board AP1 is composed of a PCB board, a PIC16C73B single-chip computer, a resistor, a capacitor, a crystal oscillator, a relay, and a connector. The connector in the control main board AP1 includes terminals marked 1X01, 1X02...1X23; the operation panel AP2 is composed of a PCB board, a PIC16C73B single-chip computer, a resistor, a capacitor, a crystal oscillator, a switch, a buzzer, an indicator light, and a connector. The connector in the operation panel AP2 includes a terminal marked 2X01; the frequency conversion board AP3 is composed of a PCB board, a SPMC75F2313A single-chip computer, a current detection integrated block ACS758, a resistor, a capacitor, an inductor, a crystal oscillator, a relay, and a connector. The connector in the frequency conversion board AP3 includes terminals marked 3X01, 3X02...3X16; the module board AP4 is composed of a PCB board, a PM100CL1A060 power module, an optical coupler, a switch tube, a resistor, a capacitor, and a connector. The connector in the module board AP4 includes terminals marked 4X01, 4X02...4X06; the 1X01 terminal of the control main board AP1 is connected to the 2X01 terminal of the operation panel AP2, the 1X02 terminal of the control main board AP1 is connected to the 3X01 terminal of the frequency conversion board AP3, and the 3X14, 3X15, and 3X16 terminals of the frequency conversion board AP3 are connected to the 4X01, 4X02, and 4X03 terminals of the module board AP4 in a one-to-one correspondence;

[0011] The power supply part includes a circuit breaker QF01 and a filter Z. The three-phase live wire input end of the circuit breaker QF01 is connected to the three-phase live wires L1, L2, and L3 of the AC, the neutral wire input end of the circuit breaker QF01 is connected to the AC neutral wire N, the three-phase live wire output end and the neutral wire output end of the circuit breaker QF01 are respectively connected to the input end of the filter Z, and the output end of the filter Z is respectively connected to the three-phase live wire output line and the neutral wire output line; the 1X03 terminal of the control main board AP1 is connected to one of the phase live wire output lines, and the 1X04 terminal of the control main board AP1 is connected to the neutral wire output line; the 3X11 terminal, 3X12 terminal, and 3X13 terminal of the frequency conversion board AP3 are connected to the three-phase live wire output lines one by one;

[0012] The 4X04, 4X05 and 4X06 terminals of the module board AP4 are connected to the U, V and W terminals of the compressor MC1 in the radome air conditioning system in a one-to-one correspondence, and the 3X02 and 3X03 terminals of the frequency conversion board AP3 are connected with a reactor L, and the 3X06, 3X07, 3X08, 3X09 and 3X10 terminals of the frequency conversion board AP3 are connected to a three-phase full-wave rectifier bridge U;

[0013] The 1X11 terminal, 1X12 terminal, and 1X13 terminal of the control main board AP1 are respectively connected to the three-phase input terminal of the fan MF1 configured for the condenser in the antenna cover air conditioning system, the neutral line terminal of the fan MF1 is connected to the neutral line output line, and the outer wall of the fan MF1 is also connected to the neutral line output line through a capacitor C;

[0014] The signal detection part includes a return air temperature and humidity sensor MI1 arranged at the return air outlet of the radome air conditioning system, an outlet air temperature and humidity sensor MI2 arranged at the outlet of the radome air conditioning system, an ambient temperature and humidity sensor MI3 arranged inside the radome, a wind speed sensor FS arranged at the outlet of the radome air conditioning system, a coil temperature sensor RT1 arranged at the evaporator coil in the radome air conditioning system, a temperature sensor RT2 arranged outside the radome, and an exhaust temperature sensor RT3 arranged at the exhaust port of the compressor in the radome air conditioning system. , the return air temperature and humidity sensor MI1 is connected to the 1X21 terminal of the control main board AP1, the outlet air temperature and humidity sensor MI2 is connected to the 1X22 terminal of the control main board AP1, the ambient temperature and humidity sensor MI3 is connected to the 1X23 terminal of the control main board AP1, the wind speed sensor FS is connected to the 1X10 terminal of the control main board AP1, the coil temperature sensor RT1 is connected to the 1X20 terminal of the control main board AP1, the temperature sensor RT2 is connected to the 3X04 terminal of the frequency conversion board AP3, and the exhaust temperature sensor RT3 is connected to the 3X05 terminal of the frequency conversion board AP3;

[0015] The electrical drive part includes an AC contactor KM01 and an AC contactor KM02. One end of the coil of the AC contactor KM01 is connected to the neutral line output line, and the other end is connected to the 1X05 terminal of the control main board AP1, and the coil of the AC contactor KM01 is connected in parallel with a resistor and capacitor element ZR1. One end of the coil of the AC contactor KM02 is connected to the neutral line output line, and the other end is connected to the 1X06 terminal of the control main board AP1, and the coil of the AC contactor KM02 is connected in parallel with a resistor and capacitor element ZR2. The input ends of the main contact KM01.1 of the AC contactor KM01 are respectively connected to the three-phase live line output line The output end of the main contact KM01.1 of the AC contactor KM01 is connected to the heater EH1 arranged in the antenna cover; the input end of the main contact KM02.1 of the AC contactor KM02 is respectively connected to the three-phase live wire output line, and the output end of the main contact KM02.1 of the AC contactor KM02 is connected to the three-phase input end of the fan MF2 configured for the evaporator in the antenna cover air conditioning system through the thermal overload relay FR01; the 1X08 terminal of the control main board AP1 is also connected to one end of the crank heating belt EH2 in the antenna cover, and the other end of the crank heating belt EH2 is connected to the neutral line output line.

[0016] The control system of the antenna cover air conditioning system is characterized in that: the 1X15 terminal of the control main board AP1 is connected to a low-pressure pressure switch PSL through a loop, and the low-pressure pressure switch PSL is connected to the pipeline between the compressor and the evaporator installed in the antenna cover air conditioning system.

[0017] The control system of the radome air conditioning system is characterized in that the 1X16 terminal of the control main board AP1 is connected to the fuse FU1 and the temperature relay ST1 through a loop.

[0018] The control system of the antenna cover air conditioning system is characterized in that the 1X07 terminal of the control main board AP1 is also connected to one end of the fresh air valve DF1 arranged at the fresh air inlet of the antenna cover air conditioning system, and the other end of the fresh air valve DF1 is connected to the neutral line output line.

[0019] The control system of the antenna cover air conditioning system is characterized in that it also includes a phase sequence protector KV01, the coil of the phase sequence protector KV01 is connected to the three-phase live wire output line, and the contact KV01.1 of the phase sequence protector KV01 is connected to the 1X14 terminal of the control main board AP1.

[0020] The control system of the radome air conditioning system is characterized in that the 1X09 terminal of the control main board AP1 is connected to a CAN communication bus.

[0021] The present invention includes a control main board AP1, an operation panel AP2, a frequency conversion board AP3, a module board AP4, etc., which are the core of the control system and mainly complete functions such as collecting information such as temperature and humidity, wind speed, system pressure, compressor current, receiving signals, executing calculations, sending I / O instructions, and reporting information; the operation panel mainly completes operations such as power on / off, working status and temperature and humidity setting, and displays working and status information.

[0022] The power supply part includes circuit breaker QF01 and filter Z. The three-phase AC 380V / 50Hz power supply voltage is connected to the controller and electrical drive part after passing through circuit breaker QF01 and filter Z. There is also a phase sequence protector KV01 for detecting the power supply.

[0023] The signal detection elements include a return air temperature and humidity sensor MI1 for detecting the temperature and humidity of the return air outlet of the air conditioning system, an outlet air temperature and humidity sensor MI2 for detecting the temperature and humidity of the outlet, a temperature and humidity sensor MI3 for detecting the temperature and humidity inside the antenna cover, a wind speed sensor FS for detecting the wind speed at the outlet, a coil temperature sensor RT1 for detecting the evaporator coil temperature, a temperature sensor RT2 for detecting the ambient temperature outside the antenna cover, an exhaust temperature sensor RT3 for detecting the compressor temperature, and a current transformer built into the frequency conversion board AP3. The control main board AP1 receives the temperature, humidity and wind speed signals, the frequency conversion board AP3 receives the ambient temperature signal outside the antenna cover and the exhaust temperature signal of the DC variable frequency compressor, and the current transformer built into the frequency conversion board AP3 collects the current signal of the compressor.

[0024] The electrical drive part includes AC contactor KM01 and AC contactor KM02, which are used to drive the electric heating tube and the fan configured for the evaporator. The coils of AC contactor KM01 and AC contactor KM02 are respectively connected in reverse parallel with the resistor and capacitor elements to release the inductive electromotive force generated when the coils are powered off.

[0025] The present invention also includes an evaporator temperature detection device. When the surface temperature of the evaporator reaches 55°C, the first-level protection element temperature relay ST1 is disconnected and the electric heating power supply is cut off; when the surface temperature of the evaporator reaches 105°C, the second-level protection element temperature fuse FU1 is blown and the electric heating power supply voltage is cut off again; when the coil temperature sensor RT1 detects the evaporator coil temperature and the evaporator temperature is lower than -5°C, the refrigeration operation is stopped to prevent the evaporator from frosting, resulting in a smaller air volume at the air outlet and a worse refrigeration effect. Refrigeration is resumed when the coil temperature is higher than 5°C.

[0026] The present invention also includes a refrigeration low-pressure protection switch PSL. When the system pressure is too low due to refrigerant leakage or other reasons, the refrigeration operation is stopped and the centrifugal fan continues to operate.

[0027] The present invention communicates with a host computer through a CAN bus to report the temperature, humidity, air flow rate of the radome air and the working state and fault information of the air conditioning system; when one set of radome air conditioning systems arranged in parallel is abnormal, the host computer automatically starts another set of radome air conditioning systems to work.

[0028] Beneficial effects of the present invention:

[0029] 1. The present invention can automatically control the temperature, humidity and flow rate of the air in the antenna cover to meet the antenna's all-weather continuous and uninterrupted working requirements.

[0030] 2. The present invention communicates with the host computer to report the temperature, humidity, air flow rate of the air in the antenna cover and the working status and fault information of the air conditioning system; when one set of antenna cover air conditioning systems arranged in parallel is abnormal, the host computer automatically starts another set of antenna cover air conditioning system to work.

[0031] 3. The present invention has a high degree of automation, can be turned on with one button, and can automatically analyze, judge, and execute ventilation, refrigeration, heating, dehumidification and other functions; it can monitor the power supply situation, refrigeration system pressure, compressor exhaust temperature, working current and other parameters in real time, and automatically adjust the speed of the compressor to achieve cooling capacity regulation under all working conditions.

[0032] 4. The present invention adopts high-voltage DC frequency conversion technology, which has small starting current, energy saving, high efficiency, and no eddy current loss. It has the advantages of AC frequency conversion and is more energy-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is the structural principle diagram of the radome air conditioning system.

[0034] Figure 2 It is an overall schematic diagram of the power supply part, electrical drive part, frequency conversion board and module board structure in the present invention.

[0035] Figure 3 It is a structural principle diagram of the control mainboard of the present invention. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0037] like Figure 1 As shown, the antenna cover air conditioning system described in the present invention includes a compressor MC1, the outlet end of the compressor MC1 is connected to the inlet end of the condenser 1, the condenser 1 is equipped with a fan MF1, the fan MF1 is a centrifugal fan, the outlet end of the condenser 1 is connected to the inlet end of the evaporator 4 through a throttling device 2 and a valve 3, the evaporator 4 is equipped with a fan MF2, the fan MF2 is an axial flow fan, the outlet end of the evaporator 4 is connected to the inlet end of the compressor MC1, and the low-pressure protection switch PSL is connected and installed in the pipeline between the compressor MC1 and the evaporator 4.

[0038] like Figure 2 , Figure 3 As shown, the control system of the radome air conditioning system of the present invention includes a control main board AP1, an operation panel AP2, a frequency conversion board AP3, a module board AP4, a power supply part, a signal detection part, and an electrical drive part, wherein:

[0039] The control main board AP1 is composed of a PCB board, a PIC16C73B single-chip computer, a resistor, a capacitor, a crystal oscillator, a relay, and a connector. The connector in the control main board AP1 includes terminals marked 1X01, 1X02...1X23; the operation panel AP2 is composed of a PCB board, a PIC16C73B single-chip computer, a resistor, a capacitor, a crystal oscillator, a switch, a buzzer, an indicator light, and a connector. The connector in the operation panel AP2 includes a terminal marked 2X01; the frequency conversion board AP3 is composed of a PCB board, a SPMC75F2313A single-chip computer, a current detection integrated block ACS758, a resistor, a capacitor, an inductor, a crystal oscillator, a relay, and a connector. The connector in the frequency conversion board AP3 includes terminals marked 3X01, 3X02...3X16; the module board AP4 is composed of a PCB board, a PM100CL1A060 power module, an optical coupler, a switch tube, a resistor, a capacitor, and a connector. The connector in the module board AP4 includes terminals marked 4X01, 4X02...4X06; the 1X01 terminal of the control main board AP1 is connected to the 2X01 terminal of the operation panel AP2, the 1X02 terminal of the control main board AP1 is connected to the 3X01 terminal of the frequency conversion board AP3, and the 3X14, 3X15, and 3X16 terminals of the frequency conversion board AP3 are connected to the 4X01, 4X02, and 4X03 terminals of the module board AP4 in a one-to-one correspondence;

[0040] The power supply part includes a circuit breaker QF01 and a filter Z. The three-phase live wire input end of the circuit breaker QF01 is connected to the three-phase live wires L1, L2, and L3 of the AC. The neutral wire input end of the circuit breaker QF01 is connected to the AC neutral wire N. The three-phase live wire output end and the neutral wire output end of the circuit breaker QF01 are respectively connected to the input end of the filter Z. The output end of the filter Z is respectively connected to the three-phase live wire output line and the neutral wire output line; the 1X03 terminal of the control main board AP1 is connected to one of the phase live wire output lines, and the 1X04 terminal of the control main board AP1 is connected to the neutral wire output line; the 3X11 terminal, 3X12 terminal, and 3X13 terminal of the frequency conversion board AP3 are connected to the three-phase live wire output lines one by one;

[0041] The 4X04, 4X05 and 4X06 terminals of the module board AP4 are connected to the U, V and W terminals of the compressor MC1 in the radome air conditioning system in a one-to-one correspondence, and the 3X02 and 3X03 terminals of the frequency conversion board AP3 are connected with a reactor L, and the 3X06, 3X07, 3X08, 3X09 and 3X10 terminals of the frequency conversion board AP3 are connected to a three-phase full-wave rectifier bridge U;

[0042] The 1X11 terminal, 1X12 terminal, and 1X13 terminal of the control main board AP1 are respectively connected to the three-phase input terminal of the fan MF1 configured for the condenser in the antenna cover air conditioning system, the neutral line terminal of the fan MF1 is connected to the neutral line output line, and the outer wall of the fan MF1 is also connected to the neutral line output line through a capacitor C;

[0043] The signal detection part includes a signal detection part arranged at the return air outlet of the radome air conditioning system ( Figure 1 The return air temperature and humidity sensor MI1 is located at the air outlet of the radome air conditioning system ( Figure 1 The outlet temperature and humidity sensor MI2 is located inside the antenna cover ( Figure 1 The ambient temperature and humidity sensor MI3 is located in the area where the condenser is located, and the air outlet of the radome air conditioning system ( Figure 1 The wind speed sensor FS is located at the evaporator coil in the radome air conditioning system ( Figure 1 The coil temperature sensor RT1 of the evaporator 4 coil position) is set outside the antenna cover ( Figure 1 The temperature sensor RT2 of the pipe area between the compressor MC1 and the condenser 1, the exhaust temperature sensor RT3 arranged at the exhaust port of the compressor in the antenna cover air conditioning system, the return air temperature and humidity sensor MI1 is connected to the 1X21 terminal of the control main board AP1, the outlet air temperature and humidity sensor MI2 is connected to the 1X22 terminal of the control main board AP1, the ambient temperature and humidity sensor MI3 is connected to the 1X23 terminal of the control main board AP1, the wind speed sensor FS is connected to the 1X10 terminal of the control main board AP1, the coil temperature sensor RT1 is connected to the 1X20 terminal of the control main board AP1, the temperature sensor RT2 is connected to the 3X04 terminal of the frequency conversion board AP3, and the exhaust temperature sensor RT3 is connected to the 3X05 terminal of the frequency conversion board AP3;

[0044] The electrical drive part includes an AC contactor KM01 and an AC contactor KM02. One end of the coil of the AC contactor KM01 is connected to the neutral line output line, and the other end is connected to the 1X05 terminal of the control main board AP1, and the coil of the AC contactor KM01 is connected in parallel with a resistor and capacitor element ZR1. One end of the coil of the AC contactor KM02 is connected to the neutral line output line, and the other end is connected to the 1X06 terminal of the control main board AP1, and the coil of the AC contactor KM02 is connected in parallel with a resistor and capacitor element ZR2. The input ends of the main contact KM01.1 of the AC contactor KM01 are respectively connected to the three-phase live line output line The output end of the main contact KM01.1 of the AC contactor KM01 is connected to the heater EH1 arranged in the antenna cover; the input end of the main contact KM02.1 of the AC contactor KM02 is respectively connected to the three-phase live wire output line, and the output end of the main contact KM02.1 of the AC contactor KM02 is connected to the three-phase input end of the fan MF2 configured for the evaporator in the antenna cover air conditioning system through the thermal overload relay FR01; the 1X08 terminal of the control main board AP1 is also connected to one end of the crank heating belt EH2 in the antenna cover, and the other end of the crank heating belt EH2 is connected to the neutral line output line.

[0045] The 1X15 terminal of the control main board AP1 is connected to a low-pressure switch PSL through a loop, and the low-pressure switch PSL is connected to a pipeline between a compressor and an evaporator installed in the antenna cover air conditioning system.

[0046] The 1X16 terminal of the control main board AP1 is connected to the fuse FU1 and the temperature relay ST1 through a loop.

[0047] The 1X07 terminal of the control main board AP1 is also connected to one end of a fresh air valve DF1 provided at a fresh air inlet of the antenna cover air conditioning system, and the other end of the fresh air valve DF1 is connected to the neutral line output line.

[0048] The present invention also includes a phase sequence protector KV01, the coil of the phase sequence protector KV01 is connected to the three-phase live output line, and the contact KV01.1 of the phase sequence protector KV01 is connected to the 1X14 terminal of the control main board AP1.

[0049] The 1X09 terminal of the control main board AP1 is connected to the CAN communication bus.

[0050] In the present invention, the control main board AP1 is composed of a PCB board, a PIC16C73B single-chip computer, a resistor, a capacitor, a crystal oscillator, a relay, a connector, etc., wherein the connector includes terminals marked 1X01, 1X02...1X23; the output end of the filter is connected to the 1X03 terminal and the 1X04 terminal of the control main board AP1, and the control main board AP1 inputs an AC~220V voltage power supply through the 1X03 terminal and the 1X04 terminal.

[0051] The operation panel AP2 is composed of a PCB board, a PIC16C73B single-chip computer, resistors, capacitors, crystal oscillators, switches, buzzers, indicator lights, connectors, etc., wherein the connectors include a terminal marked 2X01; the 2X01 terminal of the operation panel AP2 is connected to the 1X01 terminal of the control main board AP1.

[0052] The frequency conversion board AP3 is composed of a PCB board, a SPMC75F2313A single-chip microcomputer, a current detection integrated block ACS758, resistors, capacitors, inductors, crystal oscillators, relays, connectors, etc. The connectors include terminals marked 3X01, 3X02...3X16; the module board AP4 is composed of a PCB board, a PM100CL1A060 power module, an optical coupler, a switch tube, resistors, capacitors, connectors, etc. The connector includes terminals marked 4X01, 4X02...4X06; the 3X01 terminal of the frequency conversion board AP3 is connected to the 1X02 terminal of the control main board AP1, the 3X14 terminal, 3X15 terminal, and 3X16 terminal of the frequency conversion board AP3 are respectively connected to the 4X01 terminal, 4X02 terminal, and 4X03 terminal of the module board AP4, the 3X11 terminal, 3X12 terminal, and 3X13 terminal of the frequency conversion board AP3 are connected to the output terminal of the filter Z, the 4X04 terminal, 4X05 terminal, and 4X06 terminal of the module board AP4 are respectively connected to the U terminal, V terminal, and W terminal of the DC variable frequency compressor MC, the frequency conversion board AP3 and the module board AP4 together with the three-phase full-wave rectifier bridge U and the reactor L convert the three-phase AC 380V / / 50Hz power supply voltage into high-voltage DC to drive the DC variable frequency compressor MC1 to work.

[0053] The power supply combination includes circuit breaker QF01 and filter Z. The incoming line terminal of circuit breaker QF01 is connected to an external three-phase AC 380V / 50Hz power supply, and the outgoing line terminal is connected to the input terminal of filter Z. The outgoing line terminal of filter Z is connected to the incoming line terminal of AC contactor KM01 and AC contactor KM02 in the electrical drive component, and is connected to the three-phase input terminal of phase sequence detection element KV01 in the same phase sequence to ensure the power supply quality of the power supply.

[0054] The signal detection elements include a return air temperature and humidity sensor MI1 for detecting the temperature and humidity of the return air outlet of the air conditioning system, an outlet air temperature and humidity sensor MI2 for detecting the temperature and humidity of the outlet, a temperature and humidity sensor MI3 for detecting the temperature and humidity inside the antenna cover, a wind speed sensor FS for detecting the wind speed at the outlet, a coil temperature sensor RT1 for detecting the evaporator coil temperature, a temperature sensor RT2 for detecting the ambient temperature outside the antenna cover, an exhaust temperature sensor RT3 for detecting the compressor temperature, and a current transformer installed in the frequency conversion board AP3. Among them, the return air temperature and humidity sensor MI1, the outlet air temperature and humidity sensor MI2, the ambient temperature and humidity sensor MI3 inside the antenna cover, the wind speed sensor FS and the coil temperature sensor RT1 are respectively connected to the 1X21 terminal, 1X22 terminal, 1X23 terminal, 1X10 terminal and 1X20 terminal of the control main board AP1, the ambient temperature sensor RT2 outside the antenna cover is connected to the 3X04 terminal of the frequency conversion board AP3, and the compressor exhaust temperature sensor RT3 is connected to the 3X05 terminal of the frequency conversion board AP3. The control main board AP1 receives the temperature, humidity and wind speed signals, the frequency conversion board AP3 receives the ambient temperature signal outside the antenna cover and the exhaust temperature signal of the DC variable frequency compressor, and the current transformer installed in the frequency conversion board AP3 collects the current signal of the compressor.

[0055] The output ends of the main contact KM01.1 of the AC contactor KM01 are connected to the input ends of the electric heating tube EH1 respectively, and the output ends of the main contact KM02.1 of the AC contactor KM02 are connected to the axial flow fan MF2 via the thermal overload relay FR01 respectively, the fresh air valve DF1 is connected to the 1X07 terminal of the control main board AP1, and the crank heating belt EH2 is connected to the 1X08 terminal of the control main board AP1.

[0056] The coil of AC contactor KM01 is connected in reverse parallel with the resistor and capacitor element ZR1, and the coil of AC contactor KM02 is connected in reverse parallel with the resistor and capacitor element ZR2, which are used to release the inductive electromotive force generated when the coil is de-energized.

[0057] There are three parallel branches in the three-phase full-wave rectifier bridge U, each parallel branch is composed of two diodes connected in series in the same direction, the negative terminals of the three parallel branches are connected together and connected to the 3X09 terminal of the frequency conversion board AP3, the positive terminals of the three parallel branches are connected together and connected to the 3X10 terminal of the frequency conversion board AP3, and the 3X06 terminal, 3X07 terminal, and 3X08 terminal of the frequency conversion board AP3 are connected between the two diodes in the three parallel branches one by one.

[0058] The present invention also includes a communication device with a host computer, and the transmission signal of the CAN communication is respectively connected to each signal point of the 1X09 terminal of the control main board AP1.

[0059] The present invention also includes a fault detection device, a power phase sequence detection device, a phase sequence protector KV01 connected to the 1X14 terminal of the control main board AP1; a system pressure detection device, a low-pressure pressure switch PSL connected to the 1X15 terminal of the control main board AP1; an evaporator temperature detection device, a temperature relay ST1 and a temperature fuse FU1 connected in series to 1X16 of the control main board AP1, and an anti-freeze detection device coil temperature sensor RT1 connected to 1X20 of the control main board AP1.

[0060] In the present invention, each temperature sensor adopts NTC thermistor, and the NTC thermistor includes coil temperature sensor RT1 (water drop shape, 25℃, 10K, B value 3950), external environment temperature sensor RT2 (water drop shape, 25℃, 10K, B value 3950), compressor exhaust temperature sensor RT3 (copper shell, 25℃, 50K, B value 4050). Coil temperature sensor RT1 is connected to the sampling circuit on the control mainboard AP1; external environment temperature sensor RT2 and compressor exhaust temperature sensor RT3 are connected to the sampling circuit on the frequency conversion board AP3. Temperature and humidity sensors MI1, MI2, MI3 and wind speed sensor FS are connected to the sampling circuit on the control mainboard AP1.

[0061] The model of the low-pressure switch is XYK-0.05. When the pressure in the refrigeration system is lower than 0.05MPa, the metal sheet in the low-pressure switch moves, and the switch contacts are disconnected by pulling the connecting guide rod. When the pressure in the refrigeration system rises to 0.2MPa, the contacts are restored.

[0062] In the present invention, the control main board AP1 monitors the power supply status of the three-phase AC 380V / / 50Hz power supply in real time. When the power supply is missing or reversed, the power abnormality indicator light on the operation panel AP2 lights up, and the antenna cover air conditioning system is in standby mode; when the power supply is normal, the upper computer is turned on through CAN communication or through the operation panel AP2, and data communication is carried out between the control main board AP1 and the operation panel AP2.

[0063] In the present invention, the control mainboard AP1 samples the temperature, humidity and wind speed information inside the antenna cover through the return air temperature and humidity sensor MI1, the outlet air temperature and humidity sensor MI2, the indoor environment temperature and humidity sensor MI3 and the wind speed sensor FS, and reports it to the host computer through CAN communication.

[0064] The control main board AP1 automatically controls the air conditioner to perform ventilation, cooling, heating and dehumidification according to the difference between the sampling value T2 of the external environment temperature sensor RT2 and the sampling value T of the return air temperature and humidity sensor MI1 and the target temperature T0 set on the operation panel AP2.

[0065] ① When the external environment T2≥5℃, refrigeration:

[0066] When T≥T0+6℃, it is high air cooling;

[0067] When T≥T0+4℃, it is stroke cooling;

[0068] When T≥T0+2℃, it is low wind cooling;

[0069] When T≤15℃, no refrigeration.

[0070] ② When the external environment T2 is less than 5℃, fresh air;

[0071] When T≥T0+1℃, fresh air is replaced, the fresh air valve works, and the internal fan works at high speed;

[0072] When T≤T0-1℃, stop fresh air and switch to ventilation;

[0073] ③When T0-1℃≤T≤T0+1℃, ventilate with low wind speed;

[0074] ④ When the external environment T2 is less than 0℃, heating is enabled;

[0075] When T≤T0-3℃, heating, stroke;

[0076] When T≥T0℃, heating stops;

[0077] When T≥5℃, no heating is performed.

[0078] In the present invention, the control main board AP1 together with the frequency conversion board AP3 and the module board AP4 adjust the speed of the DC frequency conversion compressor according to the temperature difference change rate (d△T / dt=temperature difference change rate).

[0079] When △T≥7℃, the compressor runs at the highest allowed frequency fn (reaching the maximum power limit).

[0080] When △T<7℃, the operating frequency of the compressor begins to decrease.

[0081] The frequency decrease rule is as follows: when the frequency starts to decrease, it starts to decrease at a speed of 133 rpm per minute. At the same time, fuzzy judgment and calculation are performed based on the change curve of the temperature difference over time t (d△T / dt) to obtain the current optimal operating speed and the current speed decrease rate.

[0082] In the present invention, the external environment temperature sensor RT2 samples the external environment temperature of the antenna cover. When the sampled temperature is lower than 10° C., the heater EH2 works. After the compressor is started, the heater EH2 stops working to avoid low-temperature refrigerant shock in the compressor.

[0083] In the present invention, a separate dehumidification function key is provided on the operation panel AP2, which can be used to set the dehumidification function and upload it through CAN communication. When dehumidifying, low wind cooling is first performed for 10 minutes, then cooling is stopped, and low wind operation is performed for 6 minutes, and this cycle is repeated.

[0084] In the present invention, the protection functions include power supply abnormality protection, system pressure protection, module overheating protection, compressor exhaust temperature over-high protection, heating protection and antifreeze protection. When the power supply is abnormally protected, the power supply is phase-deficient or reversed, the 1X14 terminal interface circuit on the control main board AP1 is disconnected, the power supply abnormality indicator light on the operation panel AP2 is on, and the antenna cover air conditioning system is in standby state; when the system pressure is abnormal, the 1X15 terminal interface circuit on the control main board AP1 is disconnected, the 1X02 terminal stops outputting the cooling signal, the 4X04 terminal, the 4X05 terminal and the 4X06 terminal on the module board AP4 have no voltage output, the DC variable frequency compressor MC stops working, the protection indicator light on the operation panel AP2 is on, and when the refrigeration system pressure returns to normal, the 1X15 terminal interface circuit is closed, and the air conditioner automatically resumes refrigeration; during refrigeration, when the compressor exhaust temperature exceeds 120°C, the compressor stops working, and automatically resumes after 3 minutes, and the external fan continues to deliver air normally. In order to more intuitively display the air conditioner protection alarm status, the digital display fault code is displayed on the operation panel AP2. E0: Communication failure, E1: AC power reverse phase loss, E2: System pressure abnormality, E3: Heating protection, E4: Temperature and humidity sensor damage, E5: Wind speed sensor damage, E6: Compressor exhaust temperature greater than 120℃, E7: Compressor cooling current abnormality, E8: Module overheat protection, E9: Sensor damage.

[0085] In the present invention, the single chip model of the control main board AP1 and the operation board AP2 is PIC16C73B, the control software adopts assembly language, the software development tool is MICROCHIP MPASM V02.30.11, the software development environment is PC, and the operating system is Windows XP or above.

[0086] The embodiments described in the present invention are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made to the technical solutions of the present invention by engineers and technicians in this field should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have all been recorded in the claims.

Claims

1. A control system for a radome air conditioning system, characterized in that: It includes a control main board AP1, an operation panel AP2, a frequency conversion board AP3, a module board AP4, a power supply part, a signal detection part, and an electrical drive part, wherein: the control main board AP1 is composed of a PCB board, a PIC16C73B single-chip computer, a resistor, a capacitor, a crystal oscillator, a relay, and a connector, and the connector in the control main board AP1 includes terminals marked 1X01, 1X02...1X23; the operation panel AP2 is composed of a PCB board, a PIC16C73B single-chip computer, a resistor, a capacitor, a crystal oscillator, a switch, a buzzer, an indicator light, and a connector, and the connector in the operation panel AP2 includes a terminal marked 2X01; the frequency conversion board AP3 is composed of a PCB board, a SPMC75F2313A single-chip computer, a current detection integrated block ACS758, a resistor, a capacitor, an inductor, a crystal oscillator, a relay, and a connector. The connector in the frequency conversion board AP3 includes terminals marked 3X01, 3X02...3X16; the module board AP4 is composed of a PCB board, a PM100CL1A060 power module, an optical coupler, a switch tube, a resistor, a capacitor, and a connector. The connector in the module board AP4 includes terminals marked 4X01, 4X02...4X06; the 1X01 terminal of the control main board AP1 is connected to the 2X01 terminal of the operation panel AP2, the 1X02 terminal of the control main board AP1 is connected to the 3X01 terminal of the frequency conversion board AP3, and the 3X14, 3X15, and 3X16 terminals of the frequency conversion board AP3 are connected to the 4X01, 4X02, and 4X03 terminals of the module board AP4 in a one-to-one correspondence; the power supply part includes a circuit breaker The three-phase live wire input terminal of the circuit breaker QF01 is connected to the AC three-phase live wires L1, L2, and L3, the neutral wire input terminal of the circuit breaker QF01 is connected to the AC neutral wire N, the three-phase live wire output terminal and the neutral wire output terminal of the circuit breaker QF01 are respectively connected to the input terminal of the filter Z, and the output terminal of the filter Z is respectively connected to the three-phase live wire output line and the neutral wire output line; the 1X03 terminal of the control main board AP1 is connected to one of the phase live wire output lines, and the control main board AP1 is connected to the AC neutral wire N. The 1X04 terminal of P1 is connected to the neutral line output line; the 3X11 terminal, 3X12 terminal, and 3X13 terminal of the frequency conversion board AP3 are connected to the three-phase live line output line in a one-to-one correspondence; the 4X04 terminal, 4X05 terminal, and 4X06 terminal of the module board AP4 are connected to the U terminal, V terminal, and W terminal of the compressor MC1 in the antenna cover air conditioning system in a one-to-one correspondence, and the 3X02 terminal and 3X03 terminal of the frequency conversion board AP3 are connected with a reactor L. The 3X06 terminal, 3X07 terminal, 3X08 terminal, 3X09 terminal, and 3X10 terminal of the frequency conversion board AP3 are commonly connected to a three-phase full-wave rectifier bridge U; the 1X11 terminal, 1X12 terminal, and 1X13 terminal of the control main board AP1 are respectively connected to the three-phase input terminal of the fan MF1 configured for the condenser in the antenna cover air conditioning system, the neutral line terminal of the fan MF1 is connected to the neutral line output line, and the outer wall of the fan MF1 is also connected to the neutral line output line through a capacitor C;The signal detection part includes a return air temperature and humidity sensor MI1 arranged at the return air outlet of the radome air conditioning system, an outlet air temperature and humidity sensor MI2 arranged at the outlet of the radome air conditioning system, an ambient temperature and humidity sensor MI3 arranged inside the radome, a wind speed sensor FS arranged at the outlet of the radome air conditioning system, a coil temperature sensor RT1 arranged at the evaporator coil in the radome air conditioning system, a temperature sensor RT2 arranged outside the radome, and an exhaust temperature sensor RT3 arranged at the exhaust port of the compressor in the radome air conditioning system. The temperature and humidity sensor MI1 is connected to the 1X21 terminal of the control main board AP1, the outlet temperature and humidity sensor MI2 is connected to the 1X22 terminal of the control main board AP1, the ambient temperature and humidity sensor MI3 is connected to the 1X23 terminal of the control main board AP1, the wind speed sensor FS is connected to the 1X10 terminal of the control main board AP1, the coil temperature sensor RT1 is connected to the 1X20 terminal of the control main board AP1, the temperature sensor RT2 is connected to the 3X04 terminal of the frequency conversion board AP3, and the exhaust temperature sensor RT3 is connected to the 3X05 terminal of the frequency conversion board AP3; the electrical drive part includes AC contactor KM01 and AC contactor KM02, one end of the coil of AC contactor KM01 is connected to the neutral line output line, and the other end is connected to the 1X05 terminal of the control main board AP1, and the coil of AC contactor KM01 is connected in parallel with a resistor and capacitor element ZR1, one end of the coil of AC contactor KM02 is connected to the neutral line output line, and the other end is connected to the 1X06 terminal of the control main board AP1, and the coil of AC contactor KM02 is connected in parallel with a resistor and capacitor element ZR2; the input ends of the main contact KM01.1 of AC contactor KM01 are respectively connected to the three-phase live line output lines, and the AC The output end of the main contact KM01.1 of the contactor KM01 is connected to the heater EH1 arranged in the antenna cover; the input end of the main contact KM02.1 of the AC contactor KM02 is respectively connected to the three-phase live wire output line, and the output end of the main contact KM02.1 of the AC contactor KM02 is connected to the three-phase input end of the fan MF2 configured for the evaporator in the antenna cover air conditioning system through the thermal overload relay FR01; the 1X08 terminal of the control main board AP1 is also connected to one end of the crank heating belt EH2 in the antenna cover, and the other end of the crank heating belt EH2 is connected to the neutral line output line; The 1X15 terminal of the control main board AP1 is connected to a low-pressure pressure switch PSL through a loop, and the low-pressure pressure switch PSL is connected to the pipeline between the compressor and the evaporator installed in the radome air conditioning system; The 1X16 terminal of the control main board AP1 is connected to the fuse FU1 and the temperature relay ST1 through a loop; The 1X07 terminal of the control main board AP1 is also connected to one end of a fresh air valve DF1 provided at a fresh air inlet of the antenna cover air conditioning system, and the other end of the fresh air valve DF1 is connected to the neutral line output line.

2. The control system of the radome air conditioning system according to claim 1, characterized in that: It also includes a phase sequence protector KV01, the coil of the phase sequence protector KV01 is connected to the three-phase live output line, and the contact KV01.1 of the phase sequence protector KV01 is connected to the 1X14 terminal of the control main board AP1.

3. The control system of the radome air conditioning system according to claim 1, characterized in that: The 1X09 terminal of the control main board AP1 is connected to a CAN communication bus.

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