Data machine room air conditioner outdoor unit automatic cleaning and cooling device

Abstract

The utility model discloses a kind of data computer room air conditioner outdoor unit automatic cleaning, cooling device, including the cleaning pipeline being arranged in the lower part of air conditioner outdoor unit radiating fin, cleaning spray head is set on cleaning pipeline, the water spraying direction of cleaning spray head is directly opposite air conditioner outdoor unit radiating fin, cleaning pipeline lower part fixed cooling pipeline, atomizing spray head is set on cooling pipeline, the spray direction of atomizing spray head is directly opposite air conditioner outdoor unit radiating fin, cleaning pipeline and cooling pipeline are respectively communicated with water delivery pipe by corresponding cleaning pipeline solenoid valve and cooling pipeline solenoid valve, pressure sensor is set on water delivery pipe, water inlet pipe is communicated to water delivery pipe, water inlet pipe is sequentially provided with water solenoid valve and booster pump, cleaning pipeline solenoid valve, cooling pipeline solenoid valve, pressure sensor, water delivery solenoid valve, water solenoid valve and booster pump are electrically connected with outdoor controller.The utility model has realized automatic control cleaning and cooling.

Description

Technical Field

[0001] This utility model belongs to the field of air conditioning technology, specifically relating to a device that can clean and cool the heat dissipation fins of an air conditioner outdoor unit used in a data center. Background Technology

[0002] In data centers, air conditioning is a crucial component, absorbing heat generated by various devices to maintain constant temperature and humidity. It operates 24 / 7, regardless of the season, and is also a significant energy consumer. Ensuring the proper functioning of air conditioning is a vital aspect of data center operation and maintenance. However, air conditioning units, located outside the data center—often on the roof or suspended from the wall—are difficult to inspect and are often overlooked, making them a blind spot for maintenance.

[0003] However, the heat dissipation fins of the outdoor unit of the air conditioner are the components that facilitate heat exchange between the air conditioner refrigerant and the environment. Under the action of the fan, dust, fluff, and other pollutants from the outdoor environment are constantly adsorbed and accumulated, forming a heat insulation layer on the heat dissipation fins, which hinders heat exchange; it also blocks the gaps in the fins, reduces airflow, and lowers heat exchange efficiency. This not only increases energy consumption, but in severe cases, it can also trigger a high-pressure alarm on the compressor, or even cause the air conditioner compressor to stop working, resulting in an increase in the temperature of the data center, affecting the normal operation of the equipment in the data center, and causing serious accidents.

[0004] In addition, on hot summer afternoons, the ground temperature is high, especially in open areas where air conditioner outdoor units are placed. Sometimes the ground temperature can reach 50-60 degrees Celsius, which greatly reduces the cooling efficiency of the air conditioner and may even trigger the air conditioner compressor to protect itself and stop working, which also poses a serious safety hazard to the data center.

[0005] Currently, air conditioner outdoor units are mostly cleaned manually on a regular basis, which is cumbersome; some outdoor units are also suspended on the exterior walls of high-rise buildings, posing safety hazards. Therefore, for the safe and efficient operation of data centers, it is necessary to research automatic air conditioner outdoor unit cleaning devices. Utility Model Content

[0006] To address these technical issues, this utility model provides an automatic cleaning and cooling device for the outdoor unit of an air conditioner in a data center.

[0007] The objective of this utility model is achieved through the following technical solution: An automatic cleaning and cooling device for an outdoor unit of an air conditioner in a data center includes a cleaning pipe with a cleaning nozzle installed on it. The cleaning pipe is located below the heat dissipation fins of the outdoor unit, and the water spray direction of the cleaning nozzle is directly facing the heat dissipation fins. A cooling pipe is fixed at the lower part of the cleaning pipe, and an atomizing nozzle is installed on the cooling pipe. The spray direction of the atomizing nozzle is parallel to the heat dissipation fins. The cleaning pipe and the cooling pipe are respectively connected to a water inlet pipe via corresponding cleaning pipe solenoid valves and cooling pipe solenoid valves. A pressure sensor is installed on the water inlet pipe. A water inlet pipe is connected to the water inlet pipe, and a water inlet solenoid valve and a booster pump are sequentially installed on the water inlet pipe. The cleaning pipe solenoid valve, the cooling pipe solenoid valve, the pressure sensor, the water inlet solenoid valve, the water inlet solenoid valve, and the booster pump are all electrically connected to an outdoor controller.

[0008] The aforementioned automatic cleaning and cooling device for the outdoor unit of the air conditioner in the data center comprises a cleaning pipe that is a first frame pipe, parallel to the heat dissipation fins of the outdoor unit, and a parallel cleaning vertical pipe connected to the first frame pipe. Both the first frame pipe and the cleaning vertical pipe are equipped with several nozzles. The cooling pipe is a second frame pipe, parallel to the first frame pipe, and atomizing nozzles are arranged parallel to the second frame pipe, with the spray direction from the periphery of the second frame towards the center of the second frame.

[0009] The aforementioned automatic cleaning and cooling device for the outdoor unit of the air conditioner in the data center is equipped with an electromagnetic drain valve on the water supply pipe. The water inlet pipe is connected to the water supply pipe between the pressure sensor and the electromagnetic drain valve. The electromagnetic drain valve is electrically connected to the outdoor controller.

[0010] The aforementioned automatic cleaning and cooling device for the outdoor unit of the air conditioner in the data center has its electromagnetic drain valve and pressure sensor both installed inside the outdoor equipment box.

[0011] The aforementioned automatic cleaning and cooling device for the outdoor unit of the air conditioner in the data center also includes a temperature and humidity sensor installed inside the outdoor equipment box, which is connected to the outdoor controller.

[0012] The aforementioned automatic cleaning and cooling device for the outdoor unit of the air conditioner in the data center also includes a manual ball valve between the solenoid valve of the water inlet pipe and the booster pump.

[0013] The aforementioned automatic cleaning and cooling device for the outdoor unit of the air conditioner in the data center has cleaning nozzles evenly distributed on the cleaning pipes, with an orifice diameter of 1.0 mm. Atomizing nozzles are evenly distributed on the cooling pipes, with an orifice diameter of 0.5 mm. The number of atomizing nozzles is less than the number of cleaning nozzles.

[0014] The aforementioned automatic cleaning and cooling device for the outdoor unit of the air conditioner in the data center includes an outdoor controller comprising a data acquisition module and a drive module. The data acquisition module is connected to the drive module, and a pressure sensor is connected to the data acquisition module. The cleaning pipe solenoid valve, the cooling pipe solenoid valve, the water supply solenoid valve, the water inlet solenoid valve, and the booster pump are all connected to the drive module.

[0015] The aforementioned automatic cleaning and cooling device for the outdoor unit of the air conditioner in the data center is equipped with an electromagnetic drain valve on the water supply pipe. The water inlet pipe is connected to the water supply pipe between the pressure sensor and the electromagnetic drain valve, and the electromagnetic drain valve is connected to the drive module.

[0016] The aforementioned automatic cleaning and cooling device for the outdoor unit of the air conditioner in the data center has an electromagnetic drain valve and a pressure sensor installed inside the outdoor equipment box. The outdoor equipment box also has a temperature and humidity sensor connected to the drive module.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects: This invention achieves automatic control of cleaning and cooling by installing cleaning pipes and cooling pipes under the heat dissipation fins of an outdoor air conditioner, and then equipping the two pipes with cleaning nozzles and atomizing nozzles, as well as various valves and an outdoor controller.

[0018] This invention uses an outdoor controller to control multiple air conditioners to clean sequentially, solving the technical problems of insufficient water pressure when multiple air conditioners are cleaned together, insufficient flow rate after adding a booster pump, and water pressure drop and pipe vibration in other areas. Furthermore, this invention allows for convenient and quick electrical connection with the indoor controller. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is the circuit block diagram of this utility model.

[0021] Figure 3 This is the circuit schematic diagram of this utility model.

[0022] Figure 4 This is the circuit diagram of the power supply module of this utility model.

[0023] Figure 5 This is the schematic diagram of the RS485 interface circuit of this utility model.

[0024] Figure 6 This is the circuit schematic diagram of the acquisition module of this utility model.

[0025] Figure 7 This is the circuit diagram of the booster pump of this utility model.

[0026] Figure 8 This is the circuit diagram of the electric valve of this utility model.

[0027] Figure 9 This is a circuit block diagram of the indoor controller of this utility model. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0032] The following is combined Figure 1-9 The structure of this utility model is described in detail.

[0033] An automatic cleaning and cooling device for outdoor units of air conditioners in data centers, such as Figure 1As shown, the system includes a cleaning pipe 1 with a cleaning nozzle 2 installed on it. The cleaning pipe is located below the heat dissipation fins of the outdoor unit of the air conditioner. The water spray direction of the cleaning nozzle is directly facing the heat dissipation fins of the outdoor unit. A cooling pipe 3 is fixed at the lower part of the cleaning pipe, and an atomizing nozzle 4 is installed on it. The spray direction of the atomizing nozzle is parallel to the heat dissipation fins of the outdoor unit. The cleaning pipe and the cooling pipe are respectively connected to the water supply pipe 8 through corresponding cleaning pipe solenoid valve 5 and cooling pipe solenoid valve 6. A pressure sensor 9 is installed on the water supply pipe. A water inlet pipe 7 is connected to the water supply pipe 8. A water inlet solenoid valve 13 and a booster pump 11 are sequentially installed on the water inlet pipe 7. The cleaning pipe solenoid valve 5, the cooling pipe solenoid valve 6, the pressure sensor 9, the water inlet solenoid valve 8, the water inlet solenoid valve 13, and the booster pump 11 are all electrically connected to the outdoor controller 15. The cleaning nozzles are evenly distributed on the cleaning pipe, and the orifice diameter of the cleaning nozzles is 1.0 mm. The atomizing nozzles are evenly distributed on the cooling pipe, and the orifice diameter of the atomizing nozzles is 0.5 mm. The number of atomizing nozzles is less than the number of cleaning nozzles.

[0034] The automatic cleaning and cooling device for the outdoor unit of an air conditioner in a data center, as described in this utility model, comprises a cleaning pipe that is a first frame pipe parallel to the heat dissipation fins of the outdoor unit. A parallel cleaning vertical pipe, connected to the first frame pipe, is installed inside the first frame pipe. Several nozzles are installed on both the first frame pipe and the cleaning vertical pipe. The cooling pipe is a second frame pipe parallel to the first frame pipe. Atomizing nozzles are installed parallel to the second frame pipe, and the spray direction is from the periphery of the second frame towards the center of the second frame.

[0035] The automatic cleaning and cooling device for the outdoor unit of the data center air conditioner described in this utility model is further equipped with an electromagnetic drain valve 10 on the water inlet pipe. The water inlet pipe is connected to the water inlet pipe between the pressure sensor and the electromagnetic drain valve. The electromagnetic drain valve 10 is electrically connected to the outdoor controller 15.

[0036] The automatic cleaning and cooling device for the outdoor unit of the data center air conditioner described in this utility model has the electromagnetic drain valve 10 and the pressure sensor 9 both installed inside the outdoor equipment box.

[0037] The automatic cleaning and cooling device for the outdoor unit of the data center air conditioner described in this utility model is further equipped with a temperature and humidity sensor 14 inside the outdoor equipment box, which is connected to the outdoor controller 15.

[0038] The automatic cleaning and cooling device for the outdoor unit of the air conditioner in the data center described in this utility model also includes a manual ball valve 12 between the water inlet solenoid valve 13 and the booster pump 11.

[0039] The automatic cleaning and cooling device for the outdoor unit of the data center air conditioner described in this utility model, such as Figures 2-9As shown, the outdoor controller includes a data acquisition module and a drive module. The data acquisition module is connected to the drive module. A pressure sensor is also connected to the data acquisition module. The cleaning pipe solenoid valve, cooling pipe solenoid valve, water inlet solenoid valve, and booster pump are all connected to the drive module. The drive module is connected to the indoor controller. The indoor controller of this utility model is as follows: Figure 9 As shown, the indoor controller is placed in the computer room and consists of a power supply circuit, interface circuit, conversion module, touch screen, etc., providing an interface for communication with the computer room's power and environmental systems. This indoor controller is existing technology.

[0040] The automatic cleaning and cooling device for the outdoor unit of the data center air conditioner of this utility model is equipped with an electromagnetic drain valve on the water supply pipe. The water inlet pipe is connected to the water supply pipe between the pressure sensor and the electromagnetic drain valve. The electromagnetic drain valve is connected to the drive module.

[0041] The automatic cleaning and cooling device for the outdoor unit of the data center air conditioner described in this utility model includes an electromagnetic drain valve and a pressure sensor, both of which are installed inside the outdoor equipment box. A temperature and humidity sensor is also installed inside the outdoor equipment box and is connected to the drive module.

[0042] The working process of this utility model is as follows: The working process is described below using four air conditioner outdoor units as an example. A cleaning pipe 1 of this invention is installed under the heat dissipation fins of each outdoor unit. The drive module of the outdoor controller of this invention is then connected to the indoor controller in the machine room. The water spray direction of the cleaning nozzles is directly facing the heat dissipation fins of the outdoor unit. A cooling pipe 3 is fixed to the lower part of the cleaning pipe, and an atomizing nozzle 4 is installed on the cooling pipe. The spray direction of the atomizing nozzles is parallel to the heat dissipation fins of the outdoor unit. The cleaning pipe and the cooling pipe are connected to the incoming water pipe 8 through corresponding cleaning pipe solenoid valves 5 and cooling pipe solenoid valves 6, respectively. A pressure sensor 9 is installed on the incoming water pipe. An incoming water inlet pipe 7 is connected to the incoming water pipe 8. An incoming water solenoid valve 13 and a booster pump 11 are sequentially installed on the incoming water inlet pipe 7. The cleaning pipe solenoid valve 5, the cooling pipe solenoid valve 6, the pressure sensor 9, the incoming water solenoid valve 8, the incoming water solenoid valve 13, and the booster pump 11 are all electrically connected to the outdoor controller 15. The cleaning nozzles are evenly distributed on the cleaning pipe, and the orifice diameter of the cleaning nozzles is 1.0 mm. The atomizing nozzles are evenly distributed on the cooling pipe, and the orifice diameter of the atomizing nozzles is 0.5 mm. The number of atomizing nozzles is less than the number of cleaning nozzles.

[0043] The cleaning pipe 1 is connected to the outlet of the cleaning pipe solenoid valve 5, and the cooling pipe 3 of the air conditioner outdoor unit is connected to the outlet of the cooling pipe solenoid valve 6. The inlets of both the cleaning pipe solenoid valve 5 and the cooling pipe solenoid valve 6 are connected to the incoming water pipe 8. The cleaning pipe solenoid valve 5 and the cooling pipe solenoid valve 6 are installed near the air conditioner outdoor unit to reduce the complexity of the water pipe system.

[0044] All air conditioner outdoor unit cleaning pipe solenoid valves are connected to the water inlet end with 304 stainless steel pipes; because the pipes are exposed outdoors, they need to be protected from the sun and rust, and the pressure inside the pipes is relatively high.

[0045] The incoming water inlet pipe 7 enters the "outdoor equipment box", which is a stainless steel box containing a pressure sensor 9, an electric drain valve 10, a booster pump 11, etc.

[0046] Pressure sensor 9 is connected to the incoming water pipe 8 and monitors the pressure inside the pipe in real time, serving as a condition for system startup and operation. The outdoor controller has a preset normal operating pressure. When the pressure in the incoming water pipe is too low, booster pump 11 provides pressure boost to the incoming water, ensuring that the cleaning nozzles and atomizing nozzles reach the required pressure. When the incoming water pressure is too high, it stops operating and relies on the water pressure of the incoming water itself. The booster pump uses an AC220V booster pump.

[0047] One end of the electric drain valve 10 is connected to the incoming water pipe 8, and the other end is exposed outdoors. During cleaning and cooling operations, the electric drain valve is closed, without affecting the system; when work stops, the electric drain valve opens to drain accumulated water from all parts of the cleaning pipes and nozzles, cooling pipes and atomizing nozzles, and the incoming water pipe 8, preventing water accumulation in the pipes from causing corrosion and scaling, and preventing ice formation inside the pipes in extremely cold weather. The connection point of the electric drain valve to the incoming water pipe 8 must be at the lowest point to ensure complete drainage of accumulated water.

[0048] The water supply for the air conditioner outdoor unit cleaning and cooling device is provided by the tap water of the building where the machine room is located. Since the device is cleaned on a timed basis, once or twice a week, and the amount of water used each time is small, a special circulating water collection device is no longer set up.

[0049] If the water supply pipe is located inside the computer room, the computer room's environmental monitoring system needs to install leak detection probes around the water supply pipe to prevent water leaks.

[0050] An electric inlet valve is connected to the indoor water supply interface to control the flow of water. When starting operation, the electric inlet valve is opened to supply water; when stopping operation, the electric inlet valve is closed to shut off the water supply. The electric inlet valve is installed indoors, utilizing the relatively constant indoor temperature to prevent ice formation on the inlet pipe and inside the valve itself during extremely cold weather. The outlet pipe of the electric inlet valve has an electric drain valve installed at the rear, which remains open after each use to drain the water from the outlet pipe, preventing ice formation on the outdoor portion of the device.

[0051] After the outlet of the "electric inlet valve" is led outdoors, a manual ball valve 12 is connected near the "outdoor equipment box". During operation, the manual ball valve is always in the conducting state; during maintenance, it can be operated manually.

[0052] The cleaning pipeline solenoid valve 5 and the cooling pipeline solenoid valve 6 are electric valves, using 304 stainless steel electric ball valve switches. Their working principle is as follows: the motor, through gear reduction, drives the valve body to rotate, thus opening and closing the valve. Compared to solenoid valves, they have the advantages of large flow rate and low power consumption. In contrast, solenoid valves require continuous power throughout their operation, which can easily cause coil overheating and limit prolonged operation. The electric ball valves, after opening and closing completely, are de-energized by a limit switch, eliminating current flow and allowing them to remain in one state for an extended period, making them suitable for this device. The opening and closing process of the electric ball valves takes approximately 6 seconds, ensuring a smooth opening and closing process and preventing water hammer and pipeline resonance. The cleaning pipeline solenoid valve 5 and the cooling pipeline solenoid valve 6 are installed near the air conditioner outdoor unit and are powered by DC 24V. Figure 4 As shown, a two-wire normally closed electric ball valve is used: an open line and a common line; it contains an internal energy storage device that automatically closes after a power outage, reducing the number of control devices and control cables; the electric valve is protected by a stainless steel shell; and the control cable is protected by a conduit.

[0053] The outdoor controller of this utility model is installed in an outdoor equipment box. The outdoor controller has a waterproof structure to prevent the harm of water leakage. A louvered box is installed on the top of the outdoor equipment box, and the temperature and humidity sensor is installed in the louvered box to protect against radiation and rain and snow. The drive module is installed in the outdoor equipment box. The drive module includes drive module 1 and drive module 2, with drive module 2 being a spare.

[0054] Drive module 1 connects to the control terminals of the cleaning pipe solenoid valve 5 and cooling pipe solenoid valve 6 near the four outdoor air conditioning units via four sets of three-core cables. A single common line is used, and the three-core cable is laid outdoors, requiring sheath protection. Drive module 1 also connects to the electric drain valve inside the outdoor equipment box via one set of two-core cables. Drive module 1 further connects to the indoor electric water inlet valve via one set of two-core cables, with the three-core cable laid outdoors and requiring sheath protection. Drive module 1 also connects to the booster pump inside the outdoor equipment box via one set of two-core cables. The booster pump operates at AC220V and is equipped with a current protection circuit. A current transformer is installed on the AC220V L line at the control terminal. One current transformer signal is introduced into drive module 1 to determine overcurrent in real time and provide feedback protection. The other current transformer signal is introduced into the acquisition module to transmit the booster pump current value back to the indoor controller for system status monitoring.

[0055] Drive Module 1, the section separated by dashed lines represents the AC220V drive unit; Acquisition Module, connected to a temperature and humidity sensor; collects outdoor ambient temperature and humidity data, allowing the system to determine if the temperature is extremely low (prone to freezing) and postpone operation; determine if the temperature is extremely high (requiring cooling); and determine if the humidity is extremely high (indicating rain) and stop the cleaning operation; Acquisition Module, connected to a pressure sensor; before the booster pump starts operating, checks the water pressure in the inlet pipe to determine if there is a water shortage. If there is no water, the system stops operating; if there is water, the system checks if the inlet water pressure is sufficient for normal startup. If the water pressure is insufficient, the booster pump starts operating; after starting operation, it checks if the inlet water pressure in the inlet pipe reaches the normal pressure of the nozzle and if it is operating normally; it also checks for pressure changes caused by valves opening or closing as required, determining if any valves are malfunctioning; Acquisition Module, connected to the current transformer signal of the booster pump, transmits the booster pump current value back to the system for system status monitoring.

[0056] Three sets of cables are drawn from the indoor controller in the computer room: an RS485 signal line, a DC24V power line, and an AC220V power line. The RS485 signal line connects to the input interface of the drive module 1 of the outdoor controller. The drive module controls the operation of the booster pump, electric inlet valve, electric drain valve, and the solenoid valves for the cleaning and cooling pipes of the four outdoor air conditioning units. The acquisition module is connected to the drive module 1 via an internal bus, transmitting the temperature, humidity, water pressure, and booster pump current values ​​obtained by the acquisition module back to the indoor controller. The DC24V power supply provides power to the internal components of the drive module 1 and also serves as the driving power for the electric inlet valve, electric drain valve, and the electric valves for the cleaning and cooling of the four outdoor air conditioning units.

[0057] AC220V is the power supply for the booster pump.

[0058] If the number of outdoor air conditioning units exceeds four, it can be expanded by connecting "Drive Module 2". This is because only the drive circuits for the cleaning pipe solenoid valve 5 and the cooling pipe solenoid valve 6 near the outdoor units need to be added. "Drive Module 2" only requires RS485 and DC24V; AC220V is not needed. The core microcontroller of the acquisition module is U11: STC8H1K08, a 16-pin package. It uses an internal oscillator, has two independent serial ports, an I2C bus, and nine 10-bit AD conversion terminals; suitable for various applications. The core microcontroller of the driver module is U2: STC8H1K28, 32-pin package; it uses an internal oscillator, has 2 independent serial ports, an I2C bus, and 9 sets of 10-bit AD conversion terminals; suitable for use; the core microcontroller of the acquisition module is U11, which uses a synchronous I2C bus and AD conversion function, with a slower processing speed. It periodically sends the acquired information to the independent serial ports RXD2 and TXD2 of the core microcontroller U2 of the driver module via serial ports; the independent serial ports RX2D and TX2D of the core microcontroller U2 of the driver module, and the independent serial ports RXD1_2 and TXD1_2 of the independent serial ports, each use interrupt reception and do not affect each other; the independent serial ports RXD1_2 and TXD1_2 of the core microcontroller U2 of the driver module communicate with the indoor controller and also send the information of the acquisition module to the indoor controller.

[0059] Figure 4 This is the schematic diagram of the power supply circuit. The 24V power supply terminal output from the indoor controller is connected to the isolated DC-DC power supply NN1-24S03A to generate a 3V voltage, which is used by the microcontroller and other core components of the outdoor controller. The 24V voltage is used to power the electric valve drive circuit. The 3V voltage and the 24V voltage do not share a common ground. The 3V voltage ground is defined as GND, and the 24V voltage ground is defined as GNDA. The 3V voltage and the 24V voltage each have their own filtering circuits.

[0060] Figure 5 This is the schematic diagram of the RS485 interface circuit. The RS485 interface consists of three terminals: A+, A-, and GND. A+ and A- are connected to a surge clamping diode MXLSMBJ5.0 after passing through a 100mA resettable fuse, and then to a MAX3485. The MAX3485 is a 3V RS485 converter chip. The RX terminal of the MAX3485 is connected to P3.7 of the STC8H1K28-36I-QFN32 microcontroller. The TX terminal of the MAX3485 is connected to P3.6 of the STC8H1K28-36I-QFN32 microcontroller. The DE and RE# terminals of the MAX3485 are connected to P3.5 of the STC8H1K28-36I-QFN32 microcontroller, forming the serial port 1 receiving circuit.

[0061] The STC8H1K28-36I-QFN32 microcontroller in drive module 1 uses pins P0.0, P0.1, P0.2, P0.3, P2.7, P2.6, P2.5, P2.4, P2.3, and P2.2 to output control signals for 10 electric valves. Pin P2.4 of the STC8H1K28-36I-QFN32 outputs control signals for the booster pump. Each pin of the STC8H1K28-36I-QFN32 has a drive capability of up to 20mA.

[0062] Figure 6 This is the schematic diagram of the data acquisition circuit.

[0063] The SHT30 module is used for ambient temperature and humidity data acquisition. The SHT30 is a digital temperature and humidity sensor with a temperature measurement accuracy of 0.3 degrees Celsius. It has an I2C interface, supports 3V power supply, and is suitable for various applications. The SCL signal of the SHT30 is connected to P3.2 of the core microcontroller U11 of the acquisition module as the clock pulse terminal of the I2C bus; the SCL signal of the SHT30 is connected to pull-up resistor R19. The SDA signal of the SHT30 is connected to P3.3 of the core microcontroller U11 of the acquisition module as the data terminal of the I2C bus; the SDA signal of the SHT30 is connected to pull-up resistor R18.

[0064] Water pressure data acquisition uses a pressure sensor, which is a diffused silicon pressure transmitter with a range of 0-1.6mPa, output of 4-20mA, and a 12V power supply. It uses a 2-wire system (VCC, OUT). The 24V power supply terminal from the indoor controller is connected to the U1 isolated DC-DC power supply NN1-24S12A to generate 12V for the pressure sensor. The VCC power supply terminal of the pressure sensor is connected to the +VO terminal of the U1 isolated DC-DC power supply. The OUT terminal of the pressure sensor is connected to R16, a precision resistor of 150 ohms, which converts the 4-20mA current signal into a 0.6V-3.0V voltage signal. The OUT terminal of the pressure sensor is connected to pin 3.5 of the microcontroller U11 via a current-limiting resistor R17 for AD conversion and data transformation.

[0065] Figure 7 This is the circuit schematic of the booster pump. The MOC3043 is a thyristor driver optocoupler with zero-crossing detection, a peak voltage of 400V, and zero-crossing detection reduces electromagnetic interference during turn-on and turn-off. The internal LED drive current range is 5mA-60mA. It can be directly driven by a microcontroller with a 270-ohm resistor, outputting 7mA current, without the need for additional drive circuitry.

[0066] BT137-600: Bidirectional thyristor; connect a 5A fuse to the AC220V L input line and the output terminal of the bidirectional thyristor to prevent short circuit.

[0067] Insert a precision current transformer ZTH103 between resistor R7 and fuse F5. ZTH103 is circuit board mounted, fully encapsulated, with a through-hole primary circuit and terminals in the secondary circuit, and a turns ratio of 1:100. Connect ZTH103 secondary circuit terminals 1 and 2 to bidirectional clamping diodes D6 and D7 (1N4148) to clamp the voltage to ±0.7V. Connect ZTH103 secondary circuit terminal 1 to ground (GND). Connect ZTH103 secondary circuit terminal 2 to resistor R12. Under normal operation, it generates a peak AC voltage of approximately ±0.05V. If there is an overcurrent in the output, the voltage range will increase.

[0068] Terminal 2 of the secondary circuit of ZTH103 is connected to the input positive terminal of the integrated amplifier through the current-limiting resistor R14. The integrated amplifier adopts a non-inverting amplifier circuit. Under normal operation, the amplifier output generates a peak voltage fluctuation of about +1V. If there is an overcurrent in the output, the peak voltage will rise, and the maximum value of the peak is about 2.4V. The integrated amplifier is LM324, which contains 4 amplifiers. The circuit uses a single power supply, with a positive power supply of 3V and a negative power supply grounded GND to shield negative signals, so the output is only positive.

[0069] The output of the first group U10-1 of the integrated amplifier LM324DE is connected to the P3.4 / ADC12 of the core microcontroller U11 of the acquisition module through R20, which converts the analog voltage into a digital value. The system collects the peak value within a certain period as the working status acquisition of the booster pump.

[0070] To quickly provide overcurrent protection for the booster pump, a comparator circuit is formed using the second group of amplifiers U10-2 of the integrated amplifier LM324. The output of the first group U10-1 of the LM324DE is connected to the positive input of U10-2 through resistor R22. The negative input of U10-2 is connected to a voltage divider resistor as the current threshold of the booster pump. The output of U10-2 is connected to P1.3 of U2 as the signal input terminal for the overcurrent fault of the booster pump. When P1.3 of U2 is 1, it indicates an overcurrent fault in the booster pump. The system immediately shuts down the control signal output of P2.4 of the STC8H1K28-36I-QFN32 microcontroller to control the booster pump, stops the booster pump from working, and reports the fault information to the indoor controller via the RS485 bus.

[0071] Figure 8 This is a schematic diagram of a single-channel electric valve control. The electric valve control signal from the STC8H1K28-36I-QFN32 microcontroller is connected to terminal 3 of the TLP701 via resistor R4 (270 ohms); terminal 1 of the TLP701 is connected to a 3V power supply.

[0072] TLP701: Gate drive optocoupler for power MOSFETs, internal LED drive current range: 5mA-20mA; can be directly connected to a 270-ohm resistor by a microcontroller to output 7mA current for direct drive without the need for additional drive circuitry.

[0073] The AO4406 is an N-channel MOSFET with a withstand voltage of 30V, an operating current of 12A, and an on-resistance of 10mΩ, suitable for use in electric valves. Connecting a Schottky diode SS24 between the S and D terminals of the MOSFET further eliminates the back electromotive force of the electric valve. Connect a 5A fuse to the output of the power MOSFET to prevent short circuit.

[0074] The drive circuits for each electric valve are identical and will not be described again.

[0075] This utility model's indoor controller sets a cleaning cycle, activating the cleaning pipes at the bottom of the outdoor air conditioner at set times. Specifically, it cleans the first, second, third, and fourth air conditioners sequentially, rather than simultaneously. This sequential cleaning of the outdoor air conditioner's heat dissipation fins solves the technical problems of insufficient water pressure when cleaning all air conditioners at once, insufficient flow even with a booster pump, and water pressure drops and pipe vibrations in other areas. Simultaneously, the indoor controller sets the ambient temperature; if it exceeds the design temperature, it activates the cleaning pipe's solenoid valve to spray cooling mist onto the heat dissipation fins. After completion, based on real-time temperature and humidity sensor information, it stops spraying once the design temperature is reached. During operation, this utility model continuously monitors various conditions and uses alternating and delayed cleaning and cooling methods to prevent malfunctions and conflicts.

[0076] The above description is only a preferred embodiment of the present utility model. It should be noted that those skilled in the art can make several changes and improvements without departing from the overall concept of the present utility model, and these should also be considered within the protection scope of the present utility model.

Claims

1. An automatic cleaning and cooling device for outdoor units of air conditioners in data centers, comprising a cleaning pipe and cleaning nozzles installed on the cleaning pipe, characterized in that: The cleaning pipe is located below the heat dissipation fins of the outdoor unit of the air conditioner. The water spray direction of the cleaning nozzle is directly facing the heat dissipation fins of the outdoor unit. A cooling pipe is fixed at the bottom of the cleaning pipe. An atomizing nozzle is installed on the cooling pipe. The spray direction of the atomizing nozzle is parallel to the heat dissipation fins of the outdoor unit. The cleaning pipe and the cooling pipe are respectively connected to the water supply pipe through corresponding cleaning pipe solenoid valves and cooling pipe solenoid valves. A pressure sensor is installed on the water supply pipe. The water inlet pipe is connected to the water supply pipe. A water inlet solenoid valve and a booster pump are installed sequentially on the water inlet pipe. The cleaning pipe solenoid valve, the cooling pipe solenoid valve, the pressure sensor, the water supply solenoid valve, the water inlet solenoid valve, and the booster pump are all electrically connected to the outdoor controller.

2. The automatic cleaning and cooling device for the outdoor unit of a data center air conditioner according to claim 1, characterized in that: The cleaning pipe is a first frame pipe, which is parallel to the heat dissipation fins of the air conditioner outdoor unit. A parallel cleaning vertical pipe is installed inside the first frame pipe and is connected to the first frame pipe. Several nozzles are installed on both the first frame pipe and the cleaning vertical pipe. The cooling pipe is a second frame pipe, which is parallel to the first frame pipe. Atomizing nozzles are installed parallel to the second frame pipe, and the spray direction is from the periphery of the second frame towards the center of the second frame.

3. The automatic cleaning and cooling device for outdoor units of data center air conditioners according to claim 1, characterized in that: An electromagnetic drain valve is also installed on the water supply pipe. The water inlet pipe is connected to the water supply pipe between the pressure sensor and the electromagnetic drain valve. The electromagnetic drain valve is electrically connected to the outdoor controller.

4. The automatic cleaning and cooling device for outdoor units of data center air conditioners according to claim 3, characterized in that: Both the electromagnetic drain valve and the pressure sensor are installed inside the outdoor equipment box.

5. The automatic cleaning and cooling device for outdoor units of air conditioners in data centers according to claim 4, characterized in that: The outdoor equipment box is also equipped with a temperature and humidity sensor, which is connected to the outdoor controller.

6. The automatic cleaning and cooling device for outdoor units of data center air conditioners according to claim 5, characterized in that: A manual ball valve is also installed between the water inlet solenoid valve and the booster pump in the water inlet pipe.

7. The automatic cleaning and cooling device for outdoor units of data center air conditioners according to claim 1, characterized in that: The cleaning nozzles are evenly distributed on the cleaning pipe, and the orifice diameter of the cleaning nozzles is 1.0 mm. The atomizing nozzles are evenly distributed on the cooling pipe, and the orifice diameter of the atomizing nozzles is 0.5 mm. The number of atomizing nozzles is less than the number of cleaning nozzles.

8. The automatic cleaning and cooling device for outdoor units of air conditioners in data centers according to claim 6, characterized in that: The outdoor controller includes a data acquisition module and a drive module. The data acquisition module is connected to the drive module. The pressure sensor is connected to the data acquisition module. The cleaning pipeline solenoid valve, the cooling pipeline solenoid valve, the water supply solenoid valve, the water inlet solenoid valve, and the booster pump are all connected to the drive module.

9. The automatic cleaning and cooling device for outdoor units of data center air conditioners according to claim 8, characterized in that: An electromagnetic drain valve is also installed on the water supply pipe. The water inlet pipe is connected to the water supply pipe between the pressure sensor and the electromagnetic drain valve. The electromagnetic drain valve is connected to the drive module.

10. The automatic cleaning and cooling device for outdoor units of data center air conditioners according to claim 8, characterized in that: The electromagnetic drain valve and pressure sensor are both installed in the outdoor equipment box, which also contains a temperature and humidity sensor connected to the drive module.

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