Multifunctional cabinet environment management air conditioner

Abstract

The utility model discloses a multifunctional cabinet environment management air conditioner. Comprising a microcontroller U2, and an environment temperature and humidity measuring circuit, an NTC conditioning circuit, a dew point collector communication circuit, a load control output circuit, a load fault signal acquisition circuit, a current acquisition circuit, a voltage acquisition circuit, a water level detection circuit and an RS485 communication circuit which are connected with the microcontroller U2, and a second end of the connecting end J3 is electrically connected with a 32 pin of the controller U2 through a resistor R28. The multifunctional cabinet environment management air conditioner solves the problems that a traditional semiconductor dehumidifier is insufficient in dehumidification capacity, a common industrial air conditioner cannot condense, and a physical method cannot effectively dehumidify for a long time.

Description

Technical Field

[0001] The utility model belongs to the technical field of cabinet environment management, and specifically relates to a multifunctional cabinet environment management air conditioner. Background Art

[0002] At present, many cabinets on the market are generally built outdoors. When the cabinets are working normally, the equipment and components inside will generate a lot of heat. Since most outdoor cabinets have a high protection level, if cooling equipment is not installed, the temperature inside the cabinet will gradually rise, especially in summer, the temperature inside the cabinet will reach a peak. If the internal ambient temperature of the cabinet is too high, it is easy to cause the internal equipment and components to age faster, affecting the normal operation of the internal equipment, and even causing fire and other accidents in serious cases.

[0003] In addition, southern my country has a tropical climate. The temperature varies greatly during the day and night in autumn and winter (or plum rain season), and the humidity is heavy. Due to surface moisture, temperature differences, and poor sealing, the inside of outdoor cabinets is often particularly humid. The surrounding cables, copper plates, equipment, etc. are covered with mildew, and the metal components in the electrical cabinets are also rusty. In addition, tripping often occurs, and some even cause fire accidents.

[0004] In summary, it is particularly important to solve the problems of excessive temperature, internal moisture and condensation inside the cabinet. Currently, the market generally uses single semiconductor dehumidifiers, hygroscopic materials or ordinary industrial air conditioners to solve the problems of high humidity and high temperature.

[0005] 1. Use semiconductor dehumidifier for dehumidification:

[0006] The traditional semiconductor dehumidifiers currently used in the market are generally small in power and size. Although they can be easily installed inside various cabinets, they are only suitable for 1m2 due to limitations in size, power, circulating air volume, dehumidification principle, etc. 3 The dehumidification capacity of the following environments is generally only a few hundred milliliters per day, and the dehumidification efficiency is extremely low, which generally cannot meet the dehumidification requirements of larger spaces. In addition, this solution cannot solve the condensation problem caused by the temperature difference in the top plate, side plate, door plate, etc. in the cabinet.

[0007] 2. Use physical methods to dehumidify:

[0008] Place some hygroscopic materials inside the cabinet. This material can reduce the humidity inside the cabinet slightly in a short period of time. If moisture from the outside environment of the cabinet continues to enter, once the hygroscopic material is saturated, it will no longer be able to absorb moisture.

[0009] 3. Use ordinary industrial air conditioning:

[0010] Ordinary industrial air conditioners can solve the problem of high temperature inside the cabinet, and can also assist in solving the problem of high humidity inside the cabinet. However, this cabinet air conditioner cannot solve the condensation problem caused by temperature differences in the top panel, side panels, door panels, etc. inside the cabinet.

[0011] Therefore, further improvements are made to the above problems. Utility Model Content

[0012] The main purpose of the utility model is to provide a multifunctional cabinet environment management air conditioner to solve the problem of insufficient dehumidification of traditional semiconductor dehumidifiers, the inability of ordinary industrial air conditioners to condense, and the inability of physical dehumidification to effectively dehumidify for a long time. The air conditioner has the functions of cooling, heating, dehumidification, dew removal, hydrogen discharge, and ventilation. It has the functions of high temperature, high humidity, and system failure dry contact alarm output. It has the functions of sensor disconnection, heater disconnection, insufficient refrigerant, overcurrent, overvoltage and other fault self-detection. It has the function of temperature and humidity 4mA ~ 20mA current transmission output, RS485 communication function and other functions.

[0013] In order to achieve the above purpose, the utility model provides a multifunctional cabinet environment management air conditioner, including a microcontroller U2 and an environmental temperature and humidity measurement circuit, an NTC conditioning circuit, a dew point collector communication circuit, a load control output circuit, a load fault signal acquisition circuit, a current acquisition circuit, a voltage acquisition circuit, a water level detection circuit and an RS485 communication circuit connected to the microcontroller U2, wherein:

[0014] The environmental temperature and humidity measurement circuit includes a connection terminal J3 (connected to a temperature and humidity sensor), a second end (pin 2) of the connection terminal J3 is electrically connected to pin 32 of the controller U2 through a resistor R28, and a third end (pin 3) of the connection terminal J3 is electrically connected to pin 35 of the controller U2 through a resistor R29;

[0015] The NTC conditioning circuit includes a connection terminal J8 and a connection terminal J9 (J8 / J9 are respectively connected to a temperature sensor), the output end (pin 2) of the connection terminal J8 is electrically connected to pin 25 of the microcontroller U2 through a resistor R95, and the output end (pin 2) of the connection terminal J9 is electrically connected to pin 26 of the microcontroller U2 through a resistor R103;

[0016] The dew point collector communication circuit includes a transceiver U1 (connected to the dew point sensor through pins 6 and 7), pin 1 of the transceiver U1 is electrically connected to pin 1 of the microcontroller U2 through a resistor R4, pins 2 and 3 of the transceiver U1 are electrically connected to pin 43 of the microcontroller U2 through a resistor R7, and pin 4 of the transceiver U1 is electrically connected to pin 44 of the microcontroller U2 through a resistor R10;

[0017] The load control output circuit includes a register U6, a driver U7 and a plurality of load relays (K2-K8), each load relay is electrically connected to the driver U7 and the driver U7 is electrically connected to the register U6, the pin 11 of the register U6 is electrically connected to the pin 20 of the microcontroller U2 through a resistor R49, the pin 12 of the register U6 is electrically connected to the pin 19 of the microcontroller U2 through a resistor R48, the pin 13 of the register U6 is electrically connected to the pin 14 of the microcontroller U2 through a resistor R46, and the pin 14 of the register U6 is electrically connected to the pin 11 of the microcontroller U2 through a resistor R45;

[0018] The load fault signal acquisition circuit includes an op amp U8A, an op amp U8B, an op amp U8C and an op amp U8D (the negative input end of each op amp is connected to the object to be acquired), the output end of the op amp U8A is electrically connected to the 2 pin of the microcontroller U2 through a resistor R67, the output end of the op amp U8B is electrically connected to the 9 pin of the microcontroller U2 through a resistor R66, the output end of the op amp U8C is electrically connected to the 8 pin of the microcontroller U2 through a resistor R82, and the output end of the op amp U8D is electrically connected to the 3 pin of the microcontroller U2 through a resistor R84;

[0019] The current acquisition circuit includes an operational amplifier U13A, a negative input terminal of the operational amplifier U13A is connected to a current transformer CTI via a resistor R123, and an output terminal of the operational amplifier U13A is electrically connected to pin 21 of the microcontroller U2 via a resistor R124;

[0020] The voltage acquisition circuit includes a negative input terminal of an operational amplifier U13B connected to a voltage transformer PT1 and an output terminal of the operational amplifier U13B electrically connected to pin 22 of the microcontroller U2 via a resistor R133;

[0021] The water level detection circuit includes a connection terminal J2 (receiving a water level signal), and an output end of the connection terminal J2 is electrically connected to the 41 pin of the microcontroller U2 through a resistor R140;

[0022] The RS485 communication circuit includes a transceiver U3 (connected to the background control room through pins 6 and 7), pin 1 of the transceiver U3 is electrically connected to pin 5 of the microcontroller U2 through resistor R15, pins 2 and 3 of the transceiver U3 are electrically connected to pin 42 of the microcontroller U2 through resistor R18, and pin 4 of the transceiver U3 is electrically connected to pin 4 of the microcontroller U2 through resistor R21.

[0023] As a further preferred technical solution of the above technical solution, a 4-20mA output circuit is also included, and the 4-20mA output circuit includes transistor Q11, transistor Q9, operational amplifier U10A, transistor Q10, transistor Q8, transistor Q12, transistor Q6, operational amplifier U10B, transistor Q7 and transistor Q5, wherein:

[0024] The base of the transistor Q11 is electrically connected to the 36-pin of the microcontroller U2 through the resistor R1117, the collector of the transistor Q11 is electrically connected to the base of the transistor Q9 through the resistor R107, and the transistor Q9 is electrically connected to the transistor Q10 through the operational amplifier U10A, and the transistor Q10 is electrically connected to the transistor Q8;

[0025] The base of the transistor Q12 is electrically connected to pin 15 of the microcontroller U2 through resistor R1118, the collector of the transistor Q12 is electrically connected to the base of the transistor Q6 through resistor R97, and the transistor Q6 is electrically connected to the transistor Q7 through operational amplifier U10B, and the transistor Q7 is electrically connected to the transistor Q5.

[0026] As a further preferred technical solution of the above technical solution, it also includes a display circuit, which includes a display driver U11, a digital tube M1 and a digital tube M2, the input end of the display driver U11 is electrically connected to the microcontroller U2 and the output end of the display driver U11 is electrically connected to the digital tube M1 and the digital tube M2 respectively.

[0027] As a further preferred technical solution of the above technical solution, the display circuit further includes a plurality of display lights, and the display lights are electrically connected to the display driver U11.

[0028] As a further preferred technical solution of the above technical solution, it also includes a power supply circuit (for power supply). BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of a multifunctional cabinet environment management air conditioner of the utility model.

[0030] Figure 2 It is a circuit diagram of a microcontroller U2 of a multifunctional cabinet environment management air conditioner of the utility model.

[0031] Figure 3 The utility model discloses an environmental temperature and humidity measuring circuit diagram of a multifunctional cabinet environment management air conditioner.

[0032] Figure 4The utility model discloses an NTC regulating circuit diagram of a multifunctional cabinet environment management air conditioner.

[0033] Figure 5 The utility model discloses a communication circuit diagram of a dew point collector of a multifunctional cabinet environment management air conditioner.

[0034] Figure 6 The utility model discloses a load control output circuit diagram of a multifunctional cabinet environment management air conditioner.

[0035] Figure 7 The utility model discloses a load fault signal acquisition circuit diagram of a multifunctional cabinet environment management air conditioner.

[0036] Figure 8 The utility model discloses a current collection circuit diagram of a multifunctional cabinet environment management air conditioner.

[0037] Fig. 9 The utility model discloses a voltage collection circuit diagram of a multifunctional cabinet environment management air conditioner.

[0038] Fig.10 The utility model discloses a water level detection circuit diagram of a multifunctional cabinet environment management air conditioner.

[0039] Fig.11 The utility model discloses an RS485 communication circuit diagram of a multifunctional cabinet environment management air conditioner.

[0040] Fig.12 The utility model discloses a 4-20mA output circuit diagram of a multifunctional cabinet environment management air conditioner.

[0041] Fig.13 The utility model discloses a display circuit diagram of a multifunctional cabinet environment management air conditioner.

[0042] Fig.14 The utility model discloses a power supply circuit diagram of a multifunctional cabinet environment management air conditioner. DETAILED DESCRIPTION

[0043] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the utility model.

[0044] The utility model discloses a multifunctional cabinet environment management air conditioner. The specific embodiments of the utility model are further described below in conjunction with preferred embodiments.

[0045] In the embodiments of the present invention, those skilled in the art note that the temperature and humidity sensor and the like involved in the present invention may be regarded as prior art.

[0046] Preferred embodiments.

[0047] like Figure 1-14 As shown, the utility model discloses a multifunctional cabinet environment management air conditioner, including a microcontroller U2 and an environmental temperature and humidity measurement circuit, an NTC conditioning circuit, a dew point collector communication circuit, a load control output circuit, a load fault signal acquisition circuit, a current acquisition circuit, a voltage acquisition circuit, a water level detection circuit and an RS485 communication circuit connected to the microcontroller U2, wherein:

[0048] The environmental temperature and humidity measurement circuit includes a connection terminal J3 (connected to a temperature and humidity sensor), a second end (pin 2) of the connection terminal J3 is electrically connected to pin 32 of the controller U2 through a resistor R28, and a third end (pin 3) of the connection terminal J3 is electrically connected to pin 35 of the controller U2 through a resistor R29;

[0049] The NTC conditioning circuit includes a connection terminal J8 and a connection terminal J9 (J8 / J9 are respectively connected to a temperature sensor), the output end (pin 2) of the connection terminal J8 is electrically connected to pin 25 of the microcontroller U2 through a resistor R95, and the output end (pin 2) of the connection terminal J9 is electrically connected to pin 26 of the microcontroller U2 through a resistor R103;

[0050] The dew point collector communication circuit includes a transceiver U1 (connected to the dew point sensor through pins 6 and 7), pin 1 of the transceiver U1 is electrically connected to pin 1 of the microcontroller U2 through a resistor R4, pins 2 and 3 of the transceiver U1 are electrically connected to pin 43 of the microcontroller U2 through a resistor R7, and pin 4 of the transceiver U1 is electrically connected to pin 44 of the microcontroller U2 through a resistor R10;

[0051] The load control output circuit includes a register U6, a driver U7 and a plurality of load relays (K2-K8), each load relay is electrically connected to the driver U7 and the driver U7 is electrically connected to the register U6, the pin 11 of the register U6 is electrically connected to the pin 20 of the microcontroller U2 through a resistor R49, the pin 12 of the register U6 is electrically connected to the pin 19 of the microcontroller U2 through a resistor R48, the pin 13 of the register U6 is electrically connected to the pin 14 of the microcontroller U2 through a resistor R46, and the pin 14 of the register U6 is electrically connected to the pin 11 of the microcontroller U2 through a resistor R45;

[0052] The load fault signal acquisition circuit includes an op amp U8A, an op amp U8B, an op amp U8C and an op amp U8D (the negative input end of each op amp is connected to the object to be acquired), the output end of the op amp U8A is electrically connected to the 2 pin of the microcontroller U2 through a resistor R67, the output end of the op amp U8B is electrically connected to the 9 pin of the microcontroller U2 through a resistor R66, the output end of the op amp U8C is electrically connected to the 8 pin of the microcontroller U2 through a resistor R82, and the output end of the op amp U8D is electrically connected to the 3 pin of the microcontroller U2 through a resistor R84;

[0053] The current acquisition circuit includes an operational amplifier U13A, a negative input terminal of the operational amplifier U13A is connected to a current transformer CTI via a resistor R123, and an output terminal of the operational amplifier U13A is electrically connected to pin 21 of the microcontroller U2 via a resistor R124;

[0054] The voltage acquisition circuit includes a negative input terminal of an operational amplifier U13B connected to a voltage transformer PT1 and an output terminal of the operational amplifier U13B electrically connected to pin 22 of the microcontroller U2 via a resistor R133;

[0055] The water level detection circuit includes a connection terminal J2 (receiving a water level signal), and an output end of the connection terminal J2 is electrically connected to the 41 pin of the microcontroller U2 through a resistor R140;

[0056] The RS485 communication circuit includes a transceiver U3 (connected to the background control room through pins 6 and 7), pin 1 of the transceiver U3 is electrically connected to pin 5 of the microcontroller U2 through resistor R15, pins 2 and 3 of the transceiver U3 are electrically connected to pin 42 of the microcontroller U2 through resistor R18, and pin 4 of the transceiver U3 is electrically connected to pin 4 of the microcontroller U2 through resistor R21.

[0057] Specifically, it also includes a 4-20mA output circuit, which includes a transistor Q11, a transistor Q9, an operational amplifier U10A, a transistor Q10, a transistor Q8, a transistor Q12, a transistor Q6, an operational amplifier U10B, a transistor Q7 and a transistor Q5, wherein:

[0058] The base of the transistor Q11 is electrically connected to the 36-pin of the microcontroller U2 through the resistor R1117, the collector of the transistor Q11 is electrically connected to the base of the transistor Q9 through the resistor R107, and the transistor Q9 is electrically connected to the transistor Q10 through the operational amplifier U10A, and the transistor Q10 is electrically connected to the transistor Q8;

[0059] The base of the transistor Q12 is electrically connected to pin 15 of the microcontroller U2 through resistor R1118, the collector of the transistor Q12 is electrically connected to the base of the transistor Q6 through resistor R97, and the transistor Q6 is electrically connected to the transistor Q7 through operational amplifier U10B, and the transistor Q7 is electrically connected to the transistor Q5.

[0060] More specifically, it also includes a display circuit, which includes a display driver U11, a digital tube M1 and a digital tube M2. The input end of the display driver U11 is electrically connected to the microcontroller U2 and the output end of the display driver U11 is electrically connected to the digital tube M1 and the digital tube M2 respectively.

[0061] Furthermore, the display circuit also includes a plurality of display lights, and the display lights are electrically connected to the display driver U11.

[0062] Furthermore, a power supply circuit (for power supply) is also included.

[0063] For this utility model:

[0064] The ambient temperature and humidity measurement circuit is connected to the ambient temperature and humidity sensor, which is a digital sensor. The digital sensor is a high-precision digital sensor, which not only improves the measurement accuracy of temperature and humidity, but also improves the anti-interference of the control terminal, making the measurement stability of the ambient temperature and humidity measurement circuit better.

[0065] The NTC conditioning circuit connects two NTC sensors. The NTC sensor is a waterproof sensor and can be used in a long-term humid environment to measure the temperature of the inner coil and outer coil inside the air conditioner.

[0066] The dew point collector communication circuit is connected to the dew point collector. The dew point collector and the microcontroller are connected by RS485 communication, which greatly improves the stability of signal acquisition and facilitates the expansion of the number of dew point collector measurement paths in the later stage. The dew point collector can measure the temperature of the cabinet plate, the dew point temperature, and the ambient temperature and humidity. Combined with the control of the start and stop of the silicone heating film, it can solve the condensation problem of the cabinet internal plate.

[0067] The load control output circuit is connected to various load outputs, including compressors, which play a role in cooling and dehumidification; heaters, which play a role in heating and dehumidification; water pumps, which play a role in sending condensed water to the condenser to atomize and evaporate the condensed water; heating films, which play a role in heating the panels inside the cabinet to remove condensation; internal fans, which play a role in air circulation inside the cabinet; external fans, which play a role in cooling the air conditioner condenser. Direct ventilation output, which plays the role of an external fan; over-humidity alarm output, which plays a role in over-humidity alarm output for the internal environment of the cabinet; over-temperature alarm output, which plays a role in over-temperature alarm output for the internal environment of the cabinet.

[0068] The load fault signal acquisition circuit includes fault alarms for the heater, heating film, inner fan and outer fan. When the heater, heating film, inner fan and outer fan are working, the circuit determines the load fault information by detecting the load current. When the current is zero, it indicates a load fault, otherwise it is normal.

[0069] The current acquisition circuit is used to measure the working current of the compressor and judge whether the compressor is working normally according to the magnitude of the current.

[0070] The voltage acquisition circuit is used to measure the working voltage of the compressor and control the start and stop of the compressor according to the voltage to ensure that the compressor works in a normal voltage environment.

[0071] The 4-20mA output circuit is used to convert the ambient temperature and humidity signals into 4-20mA current signal output, thereby realizing the remote transmission of temperature and humidity signals.

[0072] The water level detection circuit is used to detect the water level in the water tank. When the water level exceeds the preset value, the microcontroller is notified to start the water pump. When the water level reaches a low level, the water pump is stopped.

[0073] The RS485 communication circuit can upload all the air conditioner's measurement information, working status, fault conditions, etc. to the background control room, making it convenient for background users to understand the operating status of the air conditioner in real time and ensure the smooth operation of the air conditioner.

[0074] The display circuit is connected to the digital tube and the LED indicator light, which can intuitively display the measurement data, working status, fault information, etc. of the air conditioner.

[0075] The power supply circuit connects the entire system and is used to convert the AC power into the low-voltage DC power required by the system and supply power to the internal circuits.

[0076] The beneficial effects of the utility model are:

[0077] 1. It has the function of collecting the dew point temperature of the cabinet body, and combined with the silicone heating film, it can effectively solve the condensation problem of the cabinet body.

[0078] 2. It can measure and display the cumulative working time of the compressor, the cumulative dehumidification time, the cumulative refrigeration time and the cumulative dew removal time, making it easy to understand the working condition of the air conditioner.

[0079] 3. It adopts an internal and external circulation isolation structure, reaches IP55 protection level and IK10 anti-collision level, can effectively prevent dust, water and insects, and can be installed indoors and outdoors.

[0080] 4. With RS485 communication function, the local working information of the air conditioner can be uploaded to the background control system, so that users can understand the operation status of the air conditioner on site.

[0081] 5. The air conditioner has an evaporative drainage function and can be used indoors. The condensed water generated by cooling and dehumidification does not need to be drained through water pipes, which greatly reduces the difficulty of installation.

[0082] It is worth mentioning that the technical features such as temperature and humidity sensors involved in this utility model patent application should be regarded as prior art. The specific structure, working principle and possible control method and spatial layout method of these technical features can be selected by conventional methods in the field and should not be regarded as the invention point of this utility model patent. This utility model patent will not be further elaborated.

[0083] For those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A multifunctional cabinet environment management air conditioner, characterized in that: It includes a microcontroller U2 and an environmental temperature and humidity measurement circuit, an NTC conditioning circuit, a dew point collector communication circuit, a load control output circuit, a load fault signal acquisition circuit, a current acquisition circuit, a voltage acquisition circuit, a water level detection circuit and an RS485 communication circuit connected to the microcontroller U2, wherein: The environmental temperature and humidity measurement circuit includes a connection terminal J3, a second end of the connection terminal J3 is electrically connected to the 32 pin of the controller U2 through a resistor R28, and a third end of the connection terminal J3 is electrically connected to the 35 pin of the controller U2 through a resistor R29; The NTC conditioning circuit includes a connection terminal J8 and a connection terminal J9, the output end of the connection terminal J8 is electrically connected to the 25 pin of the microcontroller U2 through a resistor R95, and the output end of the connection terminal J9 is electrically connected to the 26 pin of the microcontroller U2 through a resistor R103; The dew point collector communication circuit includes a transceiver U1, wherein pin 1 of the transceiver U1 is electrically connected to pin 1 of the microcontroller U2 via a resistor R4, pins 2 and 3 of the transceiver U1 are electrically connected to pin 43 of the microcontroller U2 via a resistor R7, and pin 4 of the transceiver U1 is electrically connected to pin 44 of the microcontroller U2 via a resistor R10; The load control output circuit includes a register U6, a driver U7 and a plurality of load relays, each load relay is electrically connected to the driver U7 and the driver U7 is electrically connected to the register U6, the pin 11 of the register U6 is electrically connected to the pin 20 of the microcontroller U2 through a resistor R49, the pin 12 of the register U6 is electrically connected to the pin 19 of the microcontroller U2 through a resistor R48, the pin 13 of the register U6 is electrically connected to the pin 14 of the microcontroller U2 through a resistor R46, and the pin 14 of the register U6 is electrically connected to the pin 11 of the microcontroller U2 through a resistor R45; The load fault signal acquisition circuit includes an op amp U8A, an op amp U8B, an op amp U8C and an op amp U8D, the output end of the op amp U8A is electrically connected to pin 2 of the microcontroller U2 through a resistor R67, the output end of the op amp U8B is electrically connected to pin 9 of the microcontroller U2 through a resistor R66, the output end of the op amp U8C is electrically connected to pin 8 of the microcontroller U2 through a resistor R82, and the output end of the op amp U8D is electrically connected to pin 3 of the microcontroller U2 through a resistor R84; The current acquisition circuit includes an operational amplifier U13A, a negative input terminal of the operational amplifier U13A is connected to a current transformer CTI via a resistor R123, and an output terminal of the operational amplifier U13A is electrically connected to pin 21 of the microcontroller U2 via a resistor R124; The voltage acquisition circuit includes a negative input terminal of an operational amplifier U13B connected to a voltage transformer PT1 and an output terminal of the operational amplifier U13B electrically connected to pin 22 of the microcontroller U2 via a resistor R133; The water level detection circuit includes a connection terminal J2, and an output end of the connection terminal J2 is electrically connected to the pin 41 of the microcontroller U2 through a resistor R140; The RS485 communication circuit includes a transceiver U3, pin 1 of the transceiver U3 is electrically connected to pin 5 of the microcontroller U2 through a resistor R15, pins 2 and 3 of the transceiver U3 are electrically connected to pin 42 of the microcontroller U2 through a resistor R18, and pin 4 of the transceiver U3 is electrically connected to pin 4 of the microcontroller U2 through a resistor R21.

2. A multifunctional cabinet environment management air conditioner according to claim 1, characterized in that: The device also includes a 4-20mA output circuit, which includes a transistor Q11, a transistor Q9, an operational amplifier U10A, a transistor Q10, a transistor Q8, a transistor Q12, a transistor Q6, an operational amplifier U10B, a transistor Q7, and a transistor Q5, wherein: The base of the transistor Q11 is electrically connected to the 36-pin of the microcontroller U2 through the resistor R1117, the collector of the transistor Q11 is electrically connected to the base of the transistor Q9 through the resistor R107, and the transistor Q9 is electrically connected to the transistor Q10 through the operational amplifier U10A, and the transistor Q10 is electrically connected to the transistor Q8; The base of the transistor Q12 is electrically connected to pin 15 of the microcontroller U2 through resistor R1118, the collector of the transistor Q12 is electrically connected to the base of the transistor Q6 through resistor R97, and the transistor Q6 is electrically connected to the transistor Q7 through operational amplifier U10B, and the transistor Q7 is electrically connected to the transistor Q5.

3. A multifunctional cabinet environment management air conditioner according to claim 2, characterized in that: It also includes a display circuit, which includes a display driver U11, a digital tube M1 and a digital tube M2. The input end of the display driver U11 is electrically connected to the microcontroller U2, and the output end of the display driver U11 is electrically connected to the digital tube M1 and the digital tube M2 respectively.

4. The multifunctional cabinet environment management air conditioner according to claim 3 is characterized in that: The display circuit further includes a plurality of display lamps, and the display lamps are electrically connected to the display driver U11.

5. The multifunctional cabinet environment management air conditioner according to claim 4, characterized in that: Also includes a power supply circuit.

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