Integrated cabinet air conditioner fresh air energy-saving control system

Abstract

This invention relates to an integrated cabinet-type air conditioning and fresh air energy-saving control system, belonging to the field of cabinet environmental control technology. It includes an integrated cabinet body, with an internal equipment compartment for housing electronic equipment, and further includes an air conditioning refrigeration subsystem, a fresh air heat exchange subsystem, a multi-parameter acquisition unit, a main control unit, and a human-machine interface unit. This invention, through the intelligent collaborative linkage of the air conditioning refrigeration subsystem and the fresh air heat exchange subsystem, comprehensively considers the impact of air temperature and humidity on cooling capacity, achieving smooth switching between fresh air energy-saving mode, air conditioning refrigeration mode, and hybrid linkage mode. It achieves dynamic and precise matching of cooling capacity and cooling load, facilitating dynamic adjustment of operating status based on real-time changes in the internal and external environment of the cabinet, and enabling accurate assessment of the available potential of natural cooling sources, maximizing the utilization of outdoor natural cooling sources, and improving energy-saving effects.

Description

Technical Field

[0001] This invention relates to an integrated cabinet air conditioning fresh air energy-saving control system, belonging to the field of cabinet environmental control technology. Background Technology

[0002] With the rapid development of 5G communication, big data, and cloud computing technologies, the number of communication base stations and edge data centers has increased significantly. Integrated server racks, as core equipment integrating equipment installation, power supply, and environmental control, have been widely used. The electronic equipment inside the rack generates a large amount of heat during operation, requiring continuous cooling to ensure stable operation. If this heat cannot be dissipated in time, the internal temperature of the rack will become too high, affecting the stability and lifespan of the equipment.

[0003] Currently, integrated server racks primarily rely on independent air conditioning for temperature control, operating continuously year-round. Even in winter and spring when outdoor temperatures are low, they cannot effectively utilize natural cooling sources, resulting in high energy consumption and operating costs. While some integrated server racks incorporate a fresh air system, existing air conditioning and fresh air systems often operate independently, lacking a coordinated control mechanism. They switch modes solely based on indoor and outdoor temperature comparisons, neglecting the impact of air humidity on cooling performance. Consequently, they cannot dynamically adjust their operating status according to real-time changes in the internal and external environment, accurately assess the available potential of natural cooling sources, and achieve limited energy savings. For example, when outdoor temperatures are low, they still rely on air conditioning, resulting in energy waste; conversely, when outdoor air quality is good and temperatures are suitable, the fresh air system fails to activate promptly, failing to fully utilize natural cooling sources. Therefore, this invention provides an integrated server rack air conditioning and fresh air energy-saving control system. Summary of the Invention

[0004] To address the aforementioned deficiencies in existing technologies, the present invention aims to provide an integrated cabinet air conditioning fresh air energy-saving control system. This system, through intelligent collaborative linkage between the air conditioning refrigeration subsystem and the fresh air heat exchange subsystem, can comprehensively consider the impact of air temperature and humidity on cooling capacity, achieve smooth switching between fresh air energy-saving mode, air conditioning refrigeration mode, and hybrid linkage mode, realize dynamic and precise matching of cooling capacity and cooling load, facilitate dynamic adjustment of operating status based on real-time changes in the cabinet's internal and external environment, facilitate accurate judgment of the available potential of natural cold sources, maximize the utilization of outdoor natural cold sources, and improve energy-saving effects.

[0005] To achieve the above objectives, the present invention provides an integrated cabinet air conditioning fresh air energy-saving control system, including an integrated cabinet body, wherein the integrated cabinet body has an equipment compartment for placing electronic equipment, and also includes an air conditioning refrigeration subsystem, a fresh air heat exchange subsystem, a multi-parameter acquisition unit, a main control unit, and a human-machine interaction unit;

[0006] Both the air conditioning refrigeration subsystem and the fresh air heat exchange subsystem are installed on the integrated cabinet body and are connected to the equipment compartment to provide cooling capacity to the equipment compartment.

[0007] The signal output terminal of the multi-parameter acquisition unit is connected to the signal input terminal of the main control unit, and is used to collect environmental parameters inside the equipment compartment, outdoor environmental parameters, equipment operating parameters, and operating status parameters of various system components in real time.

[0008] The control output terminal of the main control unit is connected to the controlled terminals of the air conditioning refrigeration subsystem and the fresh air heat exchange subsystem, respectively. It is used to execute the preset energy-saving control logic according to the parameters collected by the multi-parameter acquisition unit, and to perform linkage control and adaptive adjustment of the air conditioning refrigeration subsystem and the fresh air heat exchange subsystem.

[0009] The human-machine interaction unit is bidirectionally connected to the main control unit and is used for parameter setting, status display and alarm information output.

[0010] Furthermore, the air conditioning refrigeration subsystem includes a variable frequency compressor, a condenser, an electronic expansion valve, an evaporator, a condensing fan, and a refrigeration drive module. The evaporator is installed on the return air side of the equipment compartment, and the condenser is installed on the outdoor side of the integrated cabinet body. The variable frequency compressor, electronic expansion valve, evaporator, and condenser are sequentially connected through refrigerant pipelines to form a closed-loop refrigeration circuit. The condensing fan is correspondingly arranged with the condenser. The controlled end of the refrigeration drive module is connected to the control output end of the main control unit, and the output end of the refrigeration drive module is connected to the controlled ends of the variable frequency compressor, electronic expansion valve, and condensing fan, respectively.

[0011] Furthermore, the fresh air heat exchange subsystem includes a fresh air intake component, an exhaust air outlet component, a filter component, a damper actuator component, and a fresh air drive module. Both the fresh air intake component and the exhaust air outlet component are connected to the equipment compartment. The filter component is installed at the air inlet end of the fresh air intake component. The damper actuator components are respectively installed in the air ducts of the fresh air intake component and the exhaust air outlet component, used to control the opening and closing of the air ducts. The controlled end of the fresh air drive module is connected to the control output end of the main control unit, and the output end of the fresh air drive module is respectively connected to the controlled ends of the fresh air intake component, the exhaust air outlet component, and the damper actuator component.

[0012] Furthermore, the multi-parameter acquisition unit includes an indoor environment acquisition module, an outdoor environment acquisition module, an equipment load acquisition module, and a system status acquisition module. The indoor environment acquisition module includes a cabinet-mounted temperature and humidity sensor, a return air temperature sensor, a supply air temperature sensor, and a dew point temperature sensor installed in the equipment compartment, used to acquire temperature and humidity, supply and return air parameters, and dew point data within the equipment compartment. The outdoor environment acquisition module includes an outdoor temperature and humidity sensor and an atmospheric pressure sensor installed on the outdoor side of the integrated cabinet body, used to acquire outdoor temperature, humidity, and atmospheric pressure data. The equipment load acquisition module includes a current transformer and a power sensor installed in the power supply circuit of the electronic equipment in the equipment compartment, used to acquire real-time operating load data of the electronic equipment. The system status acquisition module includes an air conditioning operation status sensor, a fresh air fan speed sensor, a damper opening sensor, and a filter differential pressure sensor, used to acquire operating status and fault data of the air conditioning refrigeration subsystem and the fresh air heat exchange subsystem.

[0013] Furthermore, the main control unit incorporates an enthalpy calculation module, a mode switching control module, an adaptive adjustment module, an anti-condensation protection module, and a fault alarm module. The enthalpy calculation module calculates the indoor and outdoor air enthalpy values ​​in real time based on collected indoor and outdoor temperature, humidity, and atmospheric pressure data. The mode switching control module smoothly switches between fresh air energy-saving mode, air conditioning cooling mode, and hybrid linkage mode based on the difference between indoor and outdoor enthalpy values ​​and the comparison results between indoor temperature and humidity and set thresholds. The adaptive adjustment module dynamically adjusts the cooling output of the air conditioning cooling subsystem and the fresh air volume of the fresh air heat exchange subsystem based on the real-time operating load of the equipment and the deviation between indoor temperature and humidity and set values, achieving closed-loop precise temperature control. The anti-condensation protection module adjusts the supply air temperature and fresh air volume in real time based on the calculated dew point temperature to prevent condensation caused by the supply air temperature being lower than the dew point temperature. The fault alarm module monitors the operating status of each component of the system in real time, triggers corresponding protection actions when a fault is detected, and outputs alarm information through the human-machine interface unit.

[0014] Furthermore, the switching logic of the mode switching control module is as follows: when the outdoor air enthalpy is lower than the indoor air enthalpy, and the difference is greater than or equal to a preset first enthalpy difference threshold, and the outdoor temperature and humidity meet the preset fresh air access conditions, the control system switches to the fresh air energy-saving mode, shuts down the air conditioning cooling subsystem, and only introduces outdoor natural cold source to cool the equipment compartment through the fresh air heat exchange subsystem; when the outdoor air enthalpy is higher than the indoor air enthalpy, or the difference is less than a preset second enthalpy difference threshold, or the outdoor temperature and humidity do not meet the fresh air access conditions, the control system switches to the air conditioning cooling mode, shuts down the fresh air heat exchange subsystem, and only uses the air conditioning cooling subsystem to cool the equipment compartment; when the difference between the outdoor air enthalpy and the indoor air enthalpy is between the first enthalpy difference threshold and the second enthalpy difference threshold, the control system switches to the hybrid linkage mode, and simultaneously starts the fresh air heat exchange subsystem and the air conditioning cooling subsystem to reduce the air conditioning cooling load through fresh air pre-cooling.

[0015] Furthermore, the control logic of the anti-condensation protection module is as follows: calculate the dew point temperature of the air inside the equipment compartment in real time. When the difference between the supply air temperature and the dew point temperature is less than the preset anti-condensation threshold, prioritize increasing the supply air temperature, or reducing the fresh air volume, or shutting down the fresh air heat exchange subsystem, until the difference between the supply air temperature and the dew point temperature recovers to above the anti-condensation threshold.

[0016] Furthermore, the adaptive adjustment module adopts a PID closed-loop control algorithm, which dynamically adjusts the operating frequency of the variable frequency compressor, the opening degree of the electronic expansion valve, the speed of the fresh air fan, and the opening degree of the air valve according to the deviation between the indoor set temperature and the real-time temperature and the rate of change of the equipment real-time load, so as to stabilize the temperature and humidity in the equipment compartment within the preset range.

[0017] Furthermore, the main control unit is also equipped with a wireless communication module and a wired communication module. The main control unit is bidirectionally connected to the remote monitoring platform through the wireless communication module or the wired communication module to realize remote parameter setting, status monitoring and fault alarm.

[0018] Furthermore, the main control unit also has a built-in redundant protection module. When a fault is detected in the fresh air heat exchange subsystem, it automatically switches to the air conditioning cooling mode. When a fault is detected in the air conditioning cooling subsystem, it automatically switches to the fresh air energy-saving mode if the outdoor environment meets the conditions, and triggers an emergency alarm to ensure that the temperature inside the equipment compartment does not exceed the preset upper limit threshold.

[0019] The beneficial effects of this invention are:

[0020] By intelligently linking the air conditioning refrigeration subsystem and the fresh air heat exchange subsystem, enthalpy calculation replaces traditional temperature comparison. It comprehensively considers the impact of air temperature and humidity on cooling capacity. Based on the real-time operating load and temperature and humidity deviation of the equipment in the cabinet, it adopts a PID closed-loop control algorithm to dynamically adjust the cooling output of the air conditioner and the air volume of the fresh air, achieving dynamic and precise matching of cooling capacity and cooling load. This is beneficial for dynamically adjusting the operating status according to real-time changes in the environment inside and outside the cabinet, and for accurately judging the available potential of natural cold sources. It also enables smooth switching between fresh air energy-saving mode, air conditioning refrigeration mode, and hybrid linkage mode, maximizing the utilization of outdoor natural cold sources, significantly reducing the operating time and energy consumption of mechanical air conditioners, and significantly reducing operating costs and improving energy-saving effects. Attached Figure Description

[0021] Figure 1 This is a block diagram showing the overall architecture of the present invention.

[0022] Figure 2 This is a block diagram showing the connection between the multi-parameter acquisition unit and the internal modules of the main control unit of the present invention.

[0023] Figure 3 This is a structural connection block diagram of the air conditioning refrigeration subsystem of the present invention.

[0024] Figure 4 This is a structural connection diagram of the fresh air heat exchange subsystem of the present invention.

[0025] Figure 5 This is a flowchart illustrating the overall control method of the present invention.

[0026] Figure 6 This is a block diagram of the system operation mode switching judgment logic of the present invention.

[0027] 1. Integrated cabinet body; 2. Equipment compartment; 3. Air conditioning and refrigeration subsystem; 4. Fresh air heat exchange subsystem; 5. Multi-parameter acquisition unit; 6. Main control unit; 7. Human-machine interaction unit; 8. Remote monitoring platform. Detailed Implementation

[0028] The preferred embodiments of the present invention will now be described in detail.

[0029] As per the instruction manual Figure 1-4 As shown: The present invention provides an integrated cabinet air conditioning fresh air energy-saving control system, including an integrated cabinet body 1, an equipment compartment 2 for placing electronic equipment such as servers and communication equipment is set inside the integrated cabinet body 1, and also includes an air conditioning refrigeration subsystem 3, a fresh air heat exchange subsystem 4, a multi-parameter acquisition unit 5, a main control unit 6 and a human-machine interaction unit 7.

[0030] The air conditioning refrigeration subsystem 3 and the fresh air heat exchange subsystem 4 are both installed on the side of the integrated cabinet body 1 and are connected to the equipment compartment 2 to provide cooling for the equipment compartment 2 and remove the heat generated by the operation of electronic equipment. The signal output terminal of the multi-parameter acquisition unit 5 is connected to the signal input terminal of the main control unit 6 via an RS485 bus to collect various parameters in real time and transmit them to the main control unit 6. The main control unit 6 adopts a 32-bit ARM microcontroller, and its control output terminal is connected to the controlled terminals of the air conditioning refrigeration subsystem 3 and the fresh air heat exchange subsystem 4 respectively. It is used to execute the preset energy-saving control logic according to the parameters collected by the multi-parameter acquisition unit 5, and to perform linkage control and adaptive adjustment of the air conditioning refrigeration subsystem 3 and the fresh air heat exchange subsystem 4. The human-machine interaction unit 7 adopts a 7-inch touch screen display and is bidirectionally connected to the main control unit 6 for parameter setting, status display and alarm information output.

[0031] Specifically, the air conditioning refrigeration subsystem 3 includes a variable frequency compressor, condenser, electronic expansion valve, evaporator, condenser fan, and refrigeration drive module. The evaporator is installed on the return air side of the equipment compartment 2, and the condenser is installed on the outdoor side of the integrated cabinet body 1. The variable frequency compressor is a DC variable frequency scroll compressor. The variable frequency compressor, electronic expansion valve, evaporator, and condenser are connected in sequence through copper pipe refrigerant pipelines to form a closed-loop refrigeration circuit. The refrigerant used is R410A environmentally friendly refrigerant. The condenser fan is a DC brushless fan, which is set corresponding to the condenser to enhance the heat exchange of the condenser. The refrigeration drive module uses a variable frequency drive board, whose controlled end is connected to the control output end of the main control unit 6. The output end of the refrigeration drive module is connected to the controlled ends of the variable frequency compressor, electronic expansion valve, and condenser fan, respectively, to receive control signals from the main control unit 6 and drive the operation of each component.

[0032] The fresh air heat exchange subsystem 4 includes a fresh air intake component, an exhaust air outlet component, a filter component, a damper actuator component, and a fresh air drive module. The fresh air intake component includes an intake DC fan, installed at the bottom of the integrated cabinet body 1 and connected to the supply air side of the equipment compartment 2. The exhaust air outlet component includes an outlet DC fan, installed at the top of the integrated cabinet body 1 and connected to the return air side of the equipment compartment 2, forming a bottom-in, top-out air duct structure that matches the airflow organization within the equipment compartment 2. The filter component includes a G4 pre-filter and an F8 medium-efficiency filter. The filter, installed in series at the air inlet of the fresh air intake assembly, is used to filter dust and particulate matter in the fresh air to prevent contamination of electronic equipment in the cabinet. The air valve actuation assembly includes an electric fresh air valve and an electric exhaust air valve, which are installed in the air ducts of the fresh air intake assembly and the exhaust air outlet assembly, respectively, to control the opening and closing of the air ducts. The fresh air drive module adopts a fan drive board, whose controlled end is connected to the control output end of the main control unit 6. The output end of the fresh air drive module is connected to the controlled end of the intake fan, the exhaust fan, and the air valve actuation assembly, respectively.

[0033] The multi-parameter acquisition unit 5 includes an indoor environment acquisition module, an outdoor environment acquisition module, an equipment load acquisition module, and a system status acquisition module;

[0034] The indoor environment acquisition module includes a cabinet temperature and humidity sensor, a return air temperature sensor, a supply air temperature sensor, and a dew point temperature sensor installed in the equipment compartment 2. The cabinet temperature and humidity sensor is installed in the middle of the equipment compartment 2 to collect core temperature and humidity data within the equipment compartment 2. The return air temperature sensor is installed on the return air side of the evaporator, and the supply air temperature sensor is installed on the supply air side of the evaporator to collect the supply and return air temperatures of the air conditioner. The dew point temperature sensor is used to collect dew point data within the cabinet, and can also be used by the main control unit 6 to calculate the dew point temperature in real time based on the temperature and humidity data.

[0035] The outdoor environment acquisition module includes an outdoor temperature and humidity sensor and an atmospheric pressure sensor installed on the outdoor side of the integrated cabinet body 1, which are used to collect outdoor temperature, humidity and atmospheric pressure data to provide basic data for enthalpy calculation.

[0036] The equipment load acquisition module includes a current transformer and a power sensor installed in the power supply circuit of the electronic equipment in the equipment compartment 2. It is used to collect the real-time operating current and power data of the electronic equipment, thereby obtaining the real-time heat load of the equipment.

[0037] The system status acquisition module includes an air conditioner operation status sensor, a fresh air fan speed sensor, an air valve opening sensor, and a filter differential pressure sensor. The air conditioner operation status sensor is used to collect the compressor's operating frequency, voltage, current, and fault signals; the fresh air fan speed sensor is used to collect the real-time speed of the intake and exhaust fans; the air valve opening sensor is used to collect the real-time opening of the fresh air valve and the exhaust air valve; and the filter differential pressure sensor is installed at both ends of the filter assembly to detect the pressure difference of the filter, determine whether the filter is clogged, and remind maintenance personnel to replace it.

[0038] The main control unit 6 has a built-in enthalpy calculation module, mode switching control module, adaptive adjustment module, anti-condensation protection module, fault alarm module and redundancy protection module.

[0039] The enthalpy calculation module is used to calculate the indoor and outdoor air enthalpy values ​​in real time based on the collected indoor and outdoor temperature, humidity, and atmospheric pressure data and the air enthalpy calculation formula. The air enthalpy calculation formula is: h=1.01t+d(2501+1.86t), where h is the air enthalpy value in kJ / kg; t is the dry-bulb temperature of the air in °C; and d is the air moisture content in kg / kg dry air. The moisture content d is calculated based on the temperature, humidity, and atmospheric pressure data.

[0040] The mode switching control module is used to control the system to smoothly switch between fresh air energy-saving mode, air conditioning cooling mode and hybrid linkage mode based on the comparison results of indoor and outdoor enthalpy difference, indoor temperature and humidity and set threshold, so as to avoid equipment damage and temperature fluctuation caused by frequent switching.

[0041] The adaptive adjustment module adopts a PID closed-loop control algorithm to dynamically adjust the operating frequency of the variable frequency compressor, the opening degree of the electronic expansion valve, and the speed of the condenser fan in the air conditioning refrigeration subsystem 3, as well as the fan speed and the opening degree of the air valve in the fresh air heat exchange subsystem 4, according to the real-time operating load of the equipment, the deviation between the indoor temperature and humidity and the set value. This achieves dynamic matching between cooling capacity and heat load, and stabilizes the temperature in the equipment compartment 2 within the set value ±0.5℃ range.

[0042] The anti-condensation protection module is used to adjust the supply air temperature and fresh air volume in real time according to the calculated dew point temperature. When the difference between the supply air temperature and the dew point temperature is less than the preset anti-condensation threshold (set to 2℃ in this embodiment), the supply air temperature is increased first, or the fresh air volume is reduced, or the fresh air heat exchange subsystem 4 is shut down, until the difference between the supply air temperature and the dew point temperature recovers to more than 2℃, in order to avoid condensation.

[0043] The fault alarm module is used to monitor the operating status of each component of the system in real time. When abnormal conditions such as compressor failure, fan failure, sensor failure, and filter blockage are detected, the corresponding protection action is triggered, and alarm information is output through the display screen and audible and visual alarm of the human-machine interaction unit 7. At the same time, the alarm information is uploaded to the remote monitoring platform 8.

[0044] The redundant protection module automatically shuts down the fresh air system and switches to air conditioning cooling mode when a fault is detected in the fresh air heat exchange subsystem 4; when a fault is detected in the air conditioning cooling subsystem 3, it automatically switches to fresh air energy-saving mode and runs the fresh air system at full load, provided that the outdoor environment meets the fresh air access conditions, and triggers an emergency alarm to ensure that the temperature inside the equipment compartment 2 does not exceed the preset equipment upper limit threshold (set to 35°C in this embodiment) to avoid equipment damage due to high temperature.

[0045] The main control unit 6 is also equipped with an Ethernet wired communication module and a 4G wireless communication module. The main control unit 6 is bidirectionally connected to the remote monitoring platform 8 through the wired or wireless communication module to realize remote parameter setting, real-time status monitoring, fault alarm and remote operation and maintenance, which is suitable for unattended communication base stations and edge data center scenarios.

[0046] As per the instruction manual Figure 5-6 As shown: This embodiment also provides an integrated cabinet air conditioner fresh air energy-saving control method, applied to the above system, specifically including the following steps:

[0047] S1. Parameter initialization: After the system is powered on, it completes the self-test of each component. Through the human-machine interaction unit 7, it sets the temperature setpoint (24℃ in this embodiment), humidity setpoint (40%-60%RH in this embodiment), first enthalpy difference threshold (8kJ / kg in this embodiment), second enthalpy difference threshold (3kJ / kg in this embodiment), anti-condensation threshold (2℃), fresh air access conditions (outdoor temperature ≤22℃, relative humidity ≤70%RH) and equipment temperature upper limit threshold (35℃) in the equipment compartment 2, and stores the parameters in the main control unit 6.

[0048] S2. Real-time data acquisition: The multi-parameter acquisition unit 5 acquires the temperature and humidity, supply air temperature, return air temperature, outdoor temperature and humidity, atmospheric pressure, real-time power of the equipment, and operating status and fault data of each component of the system in real time at a frequency of 1Hz in the equipment compartment 2, and transmits the acquired data to the main control unit 6.

[0049] S3. Enthalpy Calculation and Mode Determination: The enthalpy calculation module of the main control unit 6 calculates the indoor air enthalpy h1 and the outdoor air enthalpy h2 in real time based on the collected parameters, calculates the enthalpy difference Δh = h1 - h2, and compares Δh with the enthalpy difference threshold, the indoor temperature and humidity with the set threshold, and the outdoor environment with the fresh air access conditions to determine the corresponding operating mode of the system.

[0050] When Δh≥8kJ / kg and the outdoor temperature and humidity meet the fresh air access conditions, it is determined to be a fresh air energy-saving mode;

[0051] When Δh≤3kJ / kg, or the outdoor temperature and humidity do not meet the fresh air access conditions, or the indoor temperature exceeds the set value by more than 2℃, it is determined to be in air conditioning cooling mode;

[0052] When 3kJ / kg < Δh < 8kJ / kg, and the outdoor temperature and humidity meet the fresh air access conditions, it is determined to be a hybrid linkage mode;

[0053] S4. Linkage Control and Adaptive Adjustment: Based on the determined operating mode, the main control unit 6 outputs a control signal to perform linkage control on the air conditioning refrigeration subsystem 3 and the fresh air heat exchange subsystem 4, while simultaneously executing adaptive adjustment logic:

[0054] Fresh air energy saving mode: The main control unit 6 outputs a control signal to shut down the inverter compressor of the air conditioning refrigeration subsystem 3 and completely stop mechanical refrigeration; at the same time, it opens the fresh air valve and the exhaust air valve, starts the intake fan and the exhaust fan, and dynamically adjusts the fan speed and the opening of the air valve according to the deviation between the indoor temperature and the set value, introduces the outdoor natural cold source, and stabilizes the temperature in the equipment compartment 2 within the set range.

[0055] Air conditioning cooling mode: The main control unit 6 outputs a control signal to close the fresh air valve and the exhaust air valve, and stop the operation of the fresh air heat exchange subsystem 4 to ensure the airtightness of the equipment compartment 2; at the same time, the variable frequency compressor is started, and the operating frequency of the compressor, the opening of the electronic expansion valve and the speed of the condenser fan are dynamically adjusted according to the deviation between the indoor temperature and the set value and the real-time heat load of the equipment to achieve precise cooling and avoid energy waste.

[0056] Hybrid linkage mode: The main control unit 6 outputs control signals and simultaneously starts the fresh air heat exchange subsystem 4 and the air conditioning cooling subsystem 3. First, fresh air is introduced to the outdoor cold source for pre-cooling to reduce the cooling load of the air conditioner. Then, the air conditioner is used for precise temperature control. Based on the difference between indoor and outdoor enthalpy values, the fresh air volume and air conditioning cooling output are dynamically adjusted to maximize energy consumption reduction while ensuring temperature control accuracy.

[0057] S5. Anti-condensation and fault protection: The main control unit 6 calculates the dew point temperature of the air in the equipment compartment 2 in real time and monitors the supply air temperature in real time. When the difference between the supply air temperature and the dew point temperature is less than 2℃, the anti-condensation protection action is immediately executed, prioritizing the increase of the air conditioning supply air temperature or the reduction of the fresh air volume. If the difference continues to be less than 1℃, the fresh air heat exchange subsystem 4 is immediately shut down until the difference between the supply air temperature and the dew point temperature recovers to above 2℃. At the same time, the operating status of each component of the system is monitored in real time. When a fault is detected, the corresponding protection action is triggered, and the redundant switching logic is executed through dual alarms of local sound and light and remote platform to ensure equipment safety.

[0058] S6. Cyclic Execution: The system runs continuously, repeating steps S2 to S5 to achieve continuous real-time control and energy-saving optimization of the integrated cabinet environment.

[0059] In summary, compared with the prior art, the present invention has the following advantages:

[0060] By replacing traditional temperature comparison with enthalpy calculation, and comprehensively considering the impact of air temperature and humidity on cooling capacity, the operating status can be dynamically adjusted according to real-time changes in the environment inside and outside the cabinet. This is conducive to accurately judging the available potential of natural cooling sources. Through mode switching, the smooth switching between fresh air energy-saving mode, air conditioning cooling mode, and hybrid linkage mode can be achieved, maximizing the use of outdoor natural cooling sources, significantly reducing the operating time and energy consumption of mechanical air conditioners, and significantly reducing operating costs.

[0061] By using the real-time dew point temperature of the air inside the computer cabinet, the supply air temperature and fresh air volume are controlled in conjunction with the temperature. This strictly prevents the supply air temperature from falling below the dew point temperature, thus avoiding condensation and effectively protecting the electronic equipment inside the cabinet. This greatly eliminates potential safety hazards and improves the safety of system operation.

[0062] Based on the real-time operating load and temperature and humidity deviation of the equipment in the cabinet, a PID closed-loop control algorithm is adopted to dynamically adjust the cooling output of the air conditioner and the air volume of the fresh air, so as to achieve dynamic and precise matching between cooling capacity and cooling load. This not only improves the control accuracy of temperature and humidity in the cabinet and keeps the temperature fluctuation within ±0.5℃, but also further avoids energy waste and improves energy saving effect.

[0063] Adopting an integrated design, the air conditioning and refrigeration subsystem, fresh air heat exchange subsystem, and main control unit are integrated into the integrated cabinet body. The structure is compact, easy to install and maintain, and does not require large-scale modification of existing cabinets. It has strong adaptability and can be widely used in various scenarios such as communication base stations, edge data centers, and industrial control cabinets.

[0064] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. An integrated cabinet air conditioner fresh air energy-saving control system, comprising an integrated cabinet body, the integrated cabinet body is internally provided with a device bin for placing electronic equipment, characterized in that, It also includes an air conditioning and refrigeration subsystem, a fresh air heat exchange subsystem, a multi-parameter acquisition unit, a main control unit, and a human-machine interaction unit; Both the air conditioning refrigeration subsystem and the fresh air heat exchange subsystem are installed on the integrated cabinet body and are connected to the equipment compartment to provide cooling capacity to the equipment compartment. The signal output terminal of the multi-parameter acquisition unit is connected to the signal input terminal of the main control unit, and is used to collect environmental parameters inside the equipment compartment, outdoor environmental parameters, equipment operating parameters, and operating status parameters of various system components in real time. The control output terminal of the main control unit is connected to the controlled terminals of the air conditioning refrigeration subsystem and the fresh air heat exchange subsystem, respectively. It is used to execute the preset energy-saving control logic according to the parameters collected by the multi-parameter acquisition unit, and to perform linkage control and adaptive adjustment of the air conditioning refrigeration subsystem and the fresh air heat exchange subsystem. The human-machine interaction unit is bidirectionally connected to the main control unit and is used for parameter setting, status display and alarm information output.

2. The integrated cabinet air conditioning fresh air energy-saving control system according to claim 1, characterized in that: The air conditioning refrigeration subsystem includes a variable frequency compressor, a condenser, an electronic expansion valve, an evaporator, a condensing fan, and a refrigeration drive module. The evaporator is installed on the return air side of the equipment compartment, and the condenser is installed on the outdoor side of the integrated cabinet body. The variable frequency compressor, electronic expansion valve, evaporator, and condenser are connected in sequence through refrigerant pipelines to form a closed-loop refrigeration circuit. The condensing fan is correspondingly arranged with the condenser. The controlled end of the refrigeration drive module is connected to the control output end of the main control unit, and the output end of the refrigeration drive module is connected to the controlled ends of the variable frequency compressor, electronic expansion valve, and condensing fan, respectively.

3. The integrated cabinet air conditioning fresh air energy-saving control system according to claim 1, characterized in that: The fresh air heat exchange subsystem includes a fresh air intake component, an exhaust air outlet component, a filter component, a damper actuator component, and a fresh air drive module. Both the fresh air intake component and the exhaust air outlet component are connected to the equipment compartment. The filter component is installed at the air inlet end of the fresh air intake component. The damper actuator components are installed in the air ducts of the fresh air intake component and the exhaust air outlet component, respectively, to control the opening and closing of the air ducts. The controlled end of the fresh air drive module is connected to the control output end of the main control unit, and the output end of the fresh air drive module is connected to the controlled ends of the fresh air intake component, the exhaust air outlet component, and the damper actuator component, respectively.

4. The integrated cabinet air conditioning fresh air energy-saving control system according to claim 1, characterized in that: The multi-parameter acquisition unit includes an indoor environment acquisition module, an outdoor environment acquisition module, an equipment load acquisition module, and a system status acquisition module. The indoor environment acquisition module includes a cabinet-mounted temperature and humidity sensor, a return air temperature sensor, a supply air temperature sensor, and a dew point temperature sensor installed within the equipment compartment, used to acquire temperature and humidity, supply and return air parameters, and dew point data within the equipment compartment. The outdoor environment acquisition module includes an outdoor temperature and humidity sensor and an atmospheric pressure sensor installed on the outdoor side of the integrated cabinet body, used to acquire outdoor temperature, humidity, and atmospheric pressure data. The equipment load acquisition module includes a current transformer and a power sensor installed in the power supply circuit of the electronic equipment within the equipment compartment, used to acquire real-time operating load data of the electronic equipment. The system status acquisition module includes an air conditioning operation status sensor, a fresh air fan speed sensor, a damper opening sensor, and a filter differential pressure sensor, used to acquire operating status and fault data of the air conditioning refrigeration subsystem and the fresh air heat exchange subsystem.

5. The integrated cabinet air conditioning fresh air energy-saving control system according to claim 1, characterized in that: The main control unit integrates an enthalpy calculation module, a mode switching control module, an adaptive adjustment module, an anti-condensation protection module, and a fault alarm module. The enthalpy calculation module calculates the indoor and outdoor air enthalpy values ​​in real time based on collected indoor and outdoor temperature, humidity, and atmospheric pressure data. The mode switching control module smoothly switches between fresh air energy-saving mode, air conditioning cooling mode, and hybrid linkage mode based on the difference between indoor and outdoor enthalpy values ​​and the comparison between indoor temperature and humidity and set thresholds. The adaptive adjustment module dynamically adjusts the cooling output of the air conditioning cooling subsystem and the fresh air volume of the fresh air heat exchange subsystem based on the real-time operating load of the equipment and the deviation between indoor temperature and humidity and set values, achieving closed-loop precise temperature control. The anti-condensation protection module adjusts the supply air temperature and fresh air volume in real time based on the calculated dew point temperature to prevent condensation caused by the supply air temperature being lower than the dew point temperature. The fault alarm module is used to monitor the operating status of each component of the system in real time, trigger corresponding protection actions when a fault is detected, and output alarm information through the human-machine interaction unit.

6. The integrated cabinet air conditioning fresh air energy-saving control system according to claim 5, characterized in that: The switching logic of the mode switching control module is as follows: When the outdoor air enthalpy is lower than the indoor air enthalpy, and the difference is greater than or equal to the preset first enthalpy difference threshold, and the outdoor temperature and humidity meet the preset fresh air access conditions, the control system switches to the fresh air energy-saving mode, shuts down the air conditioning cooling subsystem, and only introduces outdoor natural cold source to cool the equipment compartment through the fresh air heat exchange subsystem; when the outdoor air enthalpy is higher than the indoor air enthalpy, or the difference is less than the preset second enthalpy difference threshold, or the outdoor temperature and humidity do not meet the fresh air access conditions, the control system switches to the air conditioning cooling mode, shuts down the fresh air heat exchange subsystem, and only uses the air conditioning cooling subsystem to cool the equipment compartment; when the difference between the outdoor air enthalpy and the indoor air enthalpy is between the first enthalpy difference threshold and the second enthalpy difference threshold, the control system switches to the hybrid linkage mode, and simultaneously starts the fresh air heat exchange subsystem and the air conditioning cooling subsystem to reduce the air conditioning cooling load through fresh air pre-cooling.

7. The integrated cabinet air conditioning fresh air energy-saving control system according to claim 5, characterized in that: The control logic of the anti-condensation protection module is as follows: calculate the dew point temperature of the air in the equipment compartment in real time. When the difference between the supply air temperature and the dew point temperature is less than the preset anti-condensation threshold, prioritize increasing the supply air temperature, or reducing the fresh air volume, or shutting down the fresh air heat exchange subsystem until the difference between the supply air temperature and the dew point temperature recovers to above the anti-condensation threshold.

8. The integrated cabinet air conditioning fresh air energy-saving control system according to claim 5, characterized in that: The adaptive adjustment module adopts a PID closed-loop control algorithm. Based on the deviation between the indoor set temperature and the real-time temperature, and the rate of change of the equipment's real-time load, it dynamically adjusts the operating frequency of the variable frequency compressor, the opening degree of the electronic expansion valve, the speed of the fresh air fan, and the opening degree of the air valve to keep the temperature and humidity in the equipment compartment stable within the preset range.

9. The integrated cabinet air conditioning fresh air energy-saving control system according to claim 1, characterized in that: The main control unit is also equipped with a wireless communication module and a wired communication module. The main control unit is bidirectionally connected to the remote monitoring platform through the wireless communication module or the wired communication module to realize remote parameter setting, status monitoring and fault alarm.

10. The integrated cabinet air conditioning fresh air energy-saving control system according to claim 1, characterized in that: The main control unit also has a built-in redundant protection module. When a fault is detected in the fresh air heat exchange subsystem, it automatically switches to the air conditioning cooling mode. When a fault is detected in the air conditioning cooling subsystem, it automatically switches to the fresh air energy-saving mode if the outdoor environment meets the conditions, and triggers an emergency alarm to ensure that the temperature inside the equipment compartment does not exceed the preset upper limit threshold.

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