[0016] according to Figure 1~3 The specific structure of the present invention will be described in detail. The base station computer room air-conditioning energy-saving equipment includes a housing 1 and a liquid crystal display 2 (U3) on the housing 1, including a return key S1, an up key S2, a down key S3, and a confirm key S4. The function key 3 is composed of a power switch. 4. Room temperature sensor 9, a transmission interface composed of power cord input interface 5, data transmission interface 6, air outlet temperature sensor interface 7, semiconductor refrigerator interface 8, return air outlet temperature sensor interface 10, assembled in the housing 1 The main control unit with the single-chip microcomputer U1 and the external program memory U9 as the core and the automatic control loop formed by the corresponding electronic components and other components. The automatic control loop mainly includes the main control unit, the work mode control unit, the power conversion unit, the display and communication unit, the temperature compensation unit, the fault detection and repair unit, and the temperature acquisition control unit. A common power conversion unit is used to convert AC 220V power into a DC working power supply. It includes an AC transformer T1, a bridge rectifier circuit, an electrolytic capacitor C1, a voltage stabilizer U2 (select LM7805) and other components. The mains 220V is transformed by AC transformer T1, and converted into DC pulsating voltage through a bridge rectifier circuit composed of diodes D1-D4 (select IN4007), and then stabilized by voltage stabilizer U2, and finally through electrolytic capacitor C1. The ripple voltage is filtered out. The output stable DC +5V power supply supplies power to each unit in the automatic control loop.
[0017] Among them the main control unit: including the single-chip microcomputer U1 (select ultra-low power consumption STC89C58RD) and external program memory U9 (select HY62256) and other components. The function of the single-chip microcomputer U1: First, it receives the data transmitted from the return key S1, the up key S2, the down key S3, the confirm key S4 and the temperature acquisition control unit in the function key 3, and sends the data to the program memory U9 Process, and then extract the processed data, and finally send the data to the LCD screen U3 in the display and communication unit for display; the second is to accept the data from the working mode control unit and the fault detection and repair unit, and send the data to the program It is processed in the memory U9, and then the processed data is extracted, and finally the data is sent to the LCD screen U3 and the serial port chip U5 in the display and communication unit (MAX232 is selected). The third is to send the data transmitted by the temperature acquisition control unit and the work mode control unit to the program memory U9 for processing, and send the processed data compensation coefficients to the temperature compensation unit. The program memory U9 is used to store program codes.
[0018] Display and communication unit: Including LCD screen U3 (select LCD12232-1), serial port chip U5 (select MAX232) and function keys 3 set on the shell 1 to display the data, working mode and fault signal transmitted by the single-chip microcomputer U1 S1 ~ S4 components in the. Among them, the LCD screen U3 will display the data received by the single-chip microcomputer U1. The serial port chip U5 transmits the data of the single-chip microcomputer U1 to the upper computer or the power environment monitoring system through the data transmission interface 6 and the RS232 protocol. Among them, the working parameters can be set through the return key S1, the up key S2, the down key S3, and the confirm key S4 in the function keys 3.
[0019] The LCD screen U3 displays the working status and fault conditions of the device, and transmits the information to the upper computer or the base station or the dynamic loop monitoring of the computer room through the serial port chip U5.
[0020] Working mode control unit: including current/voltage conversion chip U11 (select MAX472), voltage comparator U12 (select LM339) and other components. Among them, the current/voltage conversion chip U11 converts the current in the three measuring sensors of the temperature acquisition control unit, the room temperature sensor G1, the return air outlet temperature sensor G2, and the air outlet temperature sensor G3, into voltage values, and then the voltage value and the set value The voltage values of 1.5V and 3.5V are compared through the voltage comparator U12 to compare the magnitude of the voltage. When the voltage value is less than 1.5V, it is determined that the working mode of the air conditioner is the cooling mode. When the voltage value is greater than 1.5V, it is determined that the working mode of the air conditioner is the heating mode. And the judgment result is transmitted to the microcontroller U1 through the voltage comparator U12.
[0021] Temperature compensation unit: includes semiconductor refrigerator U7 (select TEC) and pulse driver U10. The pulse driver U10 receives the compensation coefficient from the single-chip microcomputer U1 in the main control unit, and then the pulse driver U10 sends out a PWM pulse signal according to the compensation coefficient to drive the semiconductor refrigerator U7 to work for temperature compensation.
[0022] Fault detection and repair unit: including voltage comparator U6 (use LM324) and current sensor U8. Among them, the current sensor U8 measures the size of each part of the current, and then converts it into a voltage value, and finally sends it to the voltage comparator U6. The voltage comparator U6 compares the measured voltage with the set normal working voltage to determine whether there is a fault and the fault point. The voltage comparator U6 feeds back the voltage difference between the fault voltage value of the fault point and the normal voltage value to the fault point in proportion to eliminate the fault voltage difference and enable the fault part to work normally. If it cannot be eliminated, the fault information is output to the single-chip microcomputer U1 through the voltage comparator U6.
[0023] Temperature acquisition control unit: including analog-digital conversion chip U4 (select ADC0809) and room temperature sensor G1, return air outlet temperature sensor G2, air outlet temperature sensor G3 (each sensor selects PT100) and other components. The sensors G1, G2, and G3 convert the collected temperature values into analog voltage values and current values, which are converted into digital signals by the analog-digital conversion chip U4 and provided to the single-chip microcomputer U1 in the main control unit. At the same time, the analog voltage and current values are respectively transmitted to the current sensor U8 in the fault detection and repair unit and the current/voltage conversion chip U11 in the working mode control unit.
[0024] The room temperature sensor G1 in the temperature acquisition control unit in the above automatic control loop is fixed on the housing 1, the return air vent temperature sensor G2 and the air outlet temperature sensor G3 are fixed at the air return and air outlet of the air conditioner, and are respectively connected to the housing through wires The transmission interface of the air outlet temperature sensor interface 7 and the return air outlet temperature sensor interface 10 of the body 1; the room temperature sensor G1, the return air outlet temperature sensor G2, and G3 transmit the collected temperature analog value in three ways: one way is through analog-digital conversion The chip U4 converts the temperature analog value into a digital signal, which is processed by the single-chip microcomputer U1 in the main control unit and the external program memory U9, and then sent to the display and communication unit for display; the current/voltage conversion chip U11 of the second routing working mode control unit It is converted into a voltage signal and compared by the voltage comparator U12 to determine the cooling or heating working mode of the air conditioner, and transmit it to the single-chip microcomputer U1, and send the working mode to the display and communication unit for display; third route fault detection and repair The current sensor in the unit is converted to a voltage value by U8. After comparison by the voltage comparator U6, the fault point is determined to output the feedback voltage to repair the fault or transmit the fault signal to the single-chip microcomputer U1, which is sent to the display and communication unit for display.
[0025] The single-chip microcomputer U1 of the main control unit transfers the data transmitted by the temperature acquisition control unit and the working mode control unit to the program memory U9 for processing, and sends the processed data compensation coefficient (that is, the difference between the set temperature and the actual temperature) into the temperature compensation In the unit, the pulse driver U10 sends out a pulse signal, drives the semiconductor refrigerator U7 to work, and performs real-time dynamic compensation control on the return air outlet temperature sensor G2.
[0026] During operation, connect the power plug directly to the AC 220V power cord input port 5 on the housing 1, fix the air outlet temperature sensor G3 to the air outlet of the air conditioner, and fix the temperature sensor G2 of the return air outlet to the return air outlet of the air conditioner. The semiconductor refrigerator U7 in the temperature compensation unit connected through the semiconductor refrigerator interface 8 on the casing 1 is arranged near the air return port of the air conditioner. Turn on the power switch K1, and the air-conditioning energy-saving equipment in the communication base station computer room starts to work.
[0027] After the air conditioning energy-saving equipment in the base station computer room is powered on, the operator sets the working range and corrects the deviation between the detected temperature and the actual temperature through the keys S1-S4. First, use room temperature sensor G1, return air outlet temperature sensor G2 and air outlet temperature sensor G3 to collect the signals of the base station, the room temperature information of the computer room, and the temperature information of the air outlet and return air outlet of the air conditioner, which are divided into three channels for transmission, and one signal passes through the modulus. The conversion chip U4 converts the temperature analog value into a digital signal; then transmits the digital signal to the single-chip microcomputer U1, and the single-chip microcomputer U1 sends the data to the program memory U9 for processing, then extracts the processed data, and finally sends the data to the display And the LCD display U3 of the communication unit; the second signal is converted into a voltage signal by the current/voltage conversion chip U11 of the working mode control unit, and the voltage is sent to the voltage comparator U12, which is compared with the set voltage value , It is determined that the working mode of the air conditioner is cooling and heating, and the single-chip microcomputer U1 sends the determined mode to the LCD screen U3 for display. The third signal is converted into a voltage value by the current sensor U8 in the fault detection and repair unit, and the voltage is compared with the normal voltage by the voltage comparator U6. If a fault point is found, the voltage comparator U6 outputs the feedback voltage to the fault point, To repair the fault. If the fault is repaired, the device continues to work. If the fault is not eliminated, the voltage comparator U6 will report the fault to the microcontroller U1 in the main control unit. The microcontroller U1 will display it on the LCD screen U3 in the display and communication unit, and the serial chip U5 The fault information is output to the external host computer or the power environment monitoring system, and the equipment stops working at the same time, and will not continue to work until the fault is eliminated.
[0028] The single-chip microcomputer U1 sends the data transmitted by the temperature acquisition control unit and the working mode to the program memory U9 for processing, and sends the processed data compensation coefficient to the temperature compensation unit. The pulse driver U10I in the temperature compensation unit receives the compensation coefficient from the single-chip microcomputer U1 in the main control unit, and then drives the pulse driver U10 to send out a PWM pulse signal according to the compensation coefficient, drives the semiconductor refrigerator U7 to work, and controls the air-conditioning air inlet temperature sensor G2 Perform real-time dynamic compensation control.
