A method and system for controlling direct startup of an air conditioner in a computer room at ultra-low temperature

Abstract

The present invention relates to a method and system for controlling ultra-low temperature direct startup of a computer room air conditioner, and belongs to the field of electrical control. The present invention comprises: ultra-low temperature detection, a node for putting a low temperature startup device into operation, low temperature safety interlock control of a fan and heater, an ultra-low temperature control signal and method for the fan, and a control chip anti-backflow protection measure. At ultra-low temperatures, the temperature detection circuit automatically connects to the relevant control circuit, and immediately turns on the heater and fan of the precision air conditioner after the ultra-low temperature direct startup operation. The heater and fan are all put into operation to quickly heat up. When the ambient temperature rises to a level that allows normal operation through the touch control screen, the heater and fan automatically shut down to prompt the operator, and normal air conditioner settings and startup operations can be started from the control panel.

Description

Technical Field

[0001] The present invention belongs to the field of electrical control, and in particular relates to an ultra-low temperature direct start control method and system for a computer room air conditioner. Background Art

[0002] With the rapid development of modern society, the use of data communication-based, artificial intelligence (AI) and information-integrated remote control devices is increasing. Data centers and edge computing rooms are also experiencing widespread application and rapid development. In applications requiring outdoor mobile deployment, such as field communications command, satellite tracking and control, border security, emergency support, and geological exploration, there is a significant demand for rapidly deployable, containerized, sealed edge data centers (data communication nodes).

[0003] The outdoor environment is relatively harsh, with strong winds, dust, large temperature differences, and high humidity. Container data centers require good sealing. However, data centers are application scenarios with high power consumption and energy density. The temperature of the sealed environment will rise quickly, so corresponding air-conditioning equipment must be installed in the container data center to regulate the ambient temperature and ensure the long-term and stable operation of personnel and equipment.

[0004] Furthermore, the core of a data center is comprised of numerous servers, switches, and other high-end, sophisticated microelectronic devices. Conventional servers and other high-end, sophisticated data processing and communication equipment contain numerous high-energy-density integrated circuit chips. These chips typically operate within a temperature range of -15°C to 50°C. Operating logic stability will be significantly reduced beyond this range, impacting the accuracy of operational data and causing serious consequences. To ensure that the surface temperature and humidity of these high-density integrated circuit chips remain within acceptable safety limits for extended periods, the computer room's ambient temperature is typically maintained at approximately 20°C to 30°C.

[0005] Therefore, to ensure the long-term stable, safe and reliable operation of data communication equipment such as servers and switches within data centers, data centers and computer sites are equipped with precision air conditioners for computer rooms to regulate and control the temperature and humidity of the computer room's working environment. Precision air conditioners for computer rooms offer a wide range of environmental adaptability, comprehensive functionality, long continuous operating life, high energy efficiency, and precise control. They can adjust or intelligently manage temperature, humidity, heating and cooling curves, various protection parameters, and energy consumption parameters. They can also communicate with a host computer via various buses and interfaces, upload operating parameters for the precision air conditioner, receive information and instructions from the host computer, and remotely monitor and set parameters for the precision air conditioner. Their intelligence and management capabilities are exceptionally powerful.

[0006] The control panels for precision air conditioners in computer rooms typically use touchscreen displays, whose performance parameters are significantly affected by ambient temperature. At extremely low temperatures around -30°C, the touchscreen and the intelligent chip within it, as well as the control logic, may malfunction, making it impossible to activate the air conditioner and heat it using the touchscreen. When the system is first powered on in ambient temperatures below -30°C, the touchscreen often experiences slow response, lost commands, or a black screen. This can prevent the precision air conditioner from properly activating and heating, effectively preventing the data center from operating normally.

[0007] my country is a vast country with a complex environment. Winter temperatures in Northeast and Northwest China often drop below -40°C in many areas and periods. Data communication equipment, such as containerized mobile microcomputing centers, edge computing stations, and communication command nodes, is sometimes stored outdoors for extended periods or deployed over long distances. The equipment within the containers is fully submerged in cryogenic temperatures. In emergencies or combat readiness training, it must be quickly deployed, powered on, and operational even in environments below -40°C. However, the touchscreen display of the precision air conditioning control panel within the container can malfunction in extremely low temperatures, around -30°C. This can prevent the touchscreen from activating heating and cooling through the control panel, preventing data communication equipment, such as servers, from starting up promptly and quickly. This can slow response times in emergencies and cause significant, unforeseen losses.

[0008] Currently, the following two solutions are generally used to deal with it.

[0009] Manufacturers of precision air conditioners for computer rooms are required to raise their standards. All electronic components must be purchased and produced in strict accordance with military standards for -40°C temperatures. Authoritative inspection reports and test data are also required to ensure that the precision air conditioners can operate normally and quickly in ultra-low temperature conditions. However, due to the relatively low market demand for these precision air conditioners, the procurement cost of high-grade electronic components is extremely high, obtaining authoritative inspection reports is time-consuming and expensive, the production cycle is long, and quality inspection and management are difficult. This has led to an exponential increase in product ex-factory costs, and a sudden increase in the financial pressure on users. Many users with tight funds and short procurement cycles are often forced to purchase conventional precision air conditioners to make do. When extreme conditions occur, temporary measures are implemented to cope with them, but the results are often unsatisfactory.

[0010] In cold regions, an additional auxiliary heating device is carried along with the container. This portable mobile heating device, consisting of a heater and a blower, is used to assist in heating the machine room when the precision air conditioner fails to start on its own in extremely low temperatures. Once the temperature in the machine room rises to a level where the precision air conditioner can start up on its own, the portable heating device is disconnected and normal machine room startup procedures are resumed. Due to the large size of the portable heating device and the compact structure of the container machine room, carrying this auxiliary heating device along with the container would significantly squeeze out valuable spare tool space. Furthermore, in most cases, this device is not frequently used, taking up space and wasting money. Furthermore, it is not very safe during use, making it a less than ideal solution.

[0011] By leveraging the precision air conditioner's existing heater and fan systems and designing an ultra-low temperature startup control device, the device bypasses the touchscreen control device, which is significantly affected by ultra-low temperatures, and directly issues a startup command to the heater and fan components. This allows the precision air conditioner to self-heat in ultra-low temperature conditions. Once the ambient temperature rises to a certain level, the computer room precision air conditioner will return to normal operation. This fully utilizes the heating capacity of the existing precision air conditioner equipment, eliminating the need for temporary auxiliary equipment or means to achieve ultra-low temperature startup and operation of the precision air conditioner in the computer room. This makes it easy to operate, safe to use, compact, low-cost, and convenient to manage.

[0012] The present invention is produced just to meet this practical demand. Summary of the Invention

[0013] (1) Technical issues to be resolved

[0014] The technical problem to be solved by the present invention is how to provide a method and system for controlling the ultra-low temperature direct startup of a computer room air conditioner, so as to solve the problem that the current conventional computer room precision air conditioner is difficult to start up in an ultra-low temperature environment.

[0015] (2) Technical solution

[0016] To address the aforementioned technical issues, the present invention proposes a computer room air conditioner ultra-low temperature direct start control system. The system comprises a temperature control module, a signal module, a transfer switch (HK), a touch screen, an inter-row air conditioner intelligent control mainboard, an inter-row air conditioner internal fan unit, and a heater. The temperature control module, signal module, and transfer switch (HK) constitute an ultra-low temperature direct start electronic control device. The touch screen is connected to the inter-row air conditioner intelligent control mainboard, which controls the fan unit and heater.

[0017] Temperature control module: Through passive large hysteresis temperature and wind pressure detection devices, the ambient temperature and fan unit status data are detected and recorded online. The logic comparison circuit then calculates the temperature and wind pressure signal data to determine whether the ambient temperature is lower than the lower limit warning value. At the same time, when the relevant set conditions are met, the relevant operation signal is output, and the signal module control power supply and the control power supply circuit of all heaters are connected. When the manual direct start operation command arrives, the full-power heating operation can be immediately executed;

[0018] Signal module: controls the power generation circuit and fan control signal generator, generates the working power required for the system circuit and the speed control waveform signal corresponding to the original system, performs logic analysis and evaluation, and sends the corresponding fan unit operation control signal instruction in a timely manner. The signal instruction is sent to the transfer switch HK through the output interface, and the transfer switch HK realizes the operation control of the fan, notifying the fan unit to operate at the maximum air volume. After the temperature returns to the appropriate level, the fan unit control signal is turned off and the operation continues after the next operating condition is met;

[0019] Transfer switch HK: Connected in series between the inter-row air conditioner intelligent control board and the fan unit, the transfer switch HK manually switches between forced direct start and automatic operation. Direct heating is started manually using the transfer switch. Once the temperature returns to the set high point, the transfer switch is reset from forced direct start to automatic operation.

[0020] A method for controlling the ultra-low temperature direct start-up of a computer room air conditioner, the method comprising the following steps:

[0021] S1. Ultra-low temperature determination and control steps: Use the temperature control module to detect and monitor the ambient temperature, identify the ambient ultra-low temperature data and the input and output points of the ultra-low temperature direct start electric control device;

[0022] S2. Ultra-low temperature direct start operation steps: When the ambient temperature is lower than the set value, the ultra-low temperature direct start electronic control device starts to work. Once the manual forced start temperature increase command is issued, the ultra-low temperature direct start electronic control device directly sends control instructions to the heater and fan unit, and the air conditioner starts forced temperature increase operation;

[0023] S3. Heating and temperature control steps: During the forced heating process, the ultra-low temperature direct start electronic control device continuously monitors the ambient temperature online. When the temperature rises to a predetermined range, it automatically cuts off the heater's heating control circuit. While performing forced heating, it interlocks the temperature control signal sent by the inter-row air conditioning intelligent control mainboard to avoid backfeed interference.

[0024] S4. Heating and completing normal operating steps: When the air conditioner touch screen lights up and can operate normally, or the ambient temperature has returned to the normal range, the ultra-low temperature direct start electronic control device will automatically cut off the operation of the heater and fan unit, and remind the operator to resume normal working status.

[0025] Furthermore, in step S1, the passive large hysteresis temperature detection device in the temperature control module is used to perform online detection of the ambient temperature. After reaching the set low temperature, the precision air conditioning direct start function module in the temperature control module is activated, and the direct start heating operation is waited for. When the temperature rises to the set high point on a large scale, the direct start function is automatically shielded, and the normal control and management functions of the precision air conditioner can be restored.

[0026] Furthermore, in step S3, a method of giving the wind pressure locking signal in advance is adopted. When the temperature is lower than the set value and the precision air conditioner is manually switched to the direct start working state, the fan high-speed operation instruction is given first. After the wind pressure is reached, the heater function is activated for heating. Once the fan stops, the heater will be turned off immediately.

[0027] Furthermore, by setting a wind pressure detection probe on the temperature control module, the temperature control module will send a corresponding control signal to turn off the heater when the fan stops.

[0028] Furthermore, in step S2, direct start heating is performed by manually operating the state conversion switch HK. When the manual operation HK is converted to the forced direct start state, the control waveform signal is sent to the EC-FAN fan operation circuit in the precision air conditioner through the conversion switch HK.

[0029] Furthermore, in step S3, the control signals of the heater power supply and the ultra-low temperature direct start electronic control device are electrically interlocked and isolated. When the heating working state is directly started, the automatic operation signal path is cut off by the switching switch HK in the ultra-low temperature direct start electronic control device.

[0030] Furthermore, in step S4, a clearly observable phenomenon is used to send a signal that the forced heating and temperature rise work has been completed. After the temperature returns to the set high point, the heater and fan unit operation instructions are automatically turned off. After the fan stops running, the noise will be significantly reduced, informing the operator that the precision air conditioner in the computer room can be started normally, and the forced direct start conversion switch needs to be reset to the automatic operation state, otherwise it will not be able to start and run normally due to the safety interlock.

[0031] Furthermore, the transfer switch HK is kept in the forced direct start state for a long time, the lowest energy is used to maintain the lowest temperature range, and the air conditioner is in a waiting state to be turned on at any time.

[0032] Furthermore, the method is applied to precision air conditioning in container data center computer rooms used outdoors.

[0033] (3) Beneficial effects

[0034] The present invention proposes a method and system for controlling ultra-low-temperature direct startup of a computer room air conditioner. Based on conventional precision air conditioners, the method and system require only minor adjustments and improvements to conventional precision air conditioners. They require no special components, production control measures, or specialized testing and quality control methods, achieving forced startup and heating at ultra-low temperatures with virtually no increase in cost or price. This method and system also significantly reduces the storage space occupied by valuable spare tools, saving funds for purchasing auxiliary heating devices. The system is convenient, fast, and safe to use.

[0035] Compared with the method of increasing the temperature adaptability range of precision air conditioning by improving the level of display and control screen devices, this method only makes local fine-tuning improvements based on conventional products. It does not require special components and production control measures, nor does it require special testing means and quality control methods. It hardly increases costs and selling prices, and has great capital saving advantages.

[0036] Compared with the method of randomly carrying a set of auxiliary heating devices, this method does not require major changes to the original structure and control circuits. It only adds a small number of parts and performs local fine-tuning and improvements on the basis of conventional products, which can achieve the purpose of forced startup and heating at ultra-low temperatures, reduce the use of valuable spare tool storage space, save funds for purchasing auxiliary heating devices, and is easy, fast and safe to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 Schematic diagram of the process of the present invention;

[0038] Figure 2 Schematic diagram of an embodiment of the method of the present invention;

[0039] Figure 3 This is a schematic diagram of the control system for the original machine room's precision air-conditioning heater and fan unit;

[0040] Figure 4 This is a structural diagram of the direct-start control circuit system of the present invention. DETAILED DESCRIPTION

[0041] In order to make the purpose, content and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below with reference to the accompanying drawings and examples.

[0042] The present invention relates to a control method and electrical system for precision air conditioning in a computer room, and in particular to ultra-low temperature applications of precision air conditioning in container data center computer rooms used outdoors. Utilizing the control method and system designed herein, a method and system for directly turning on a heater and a fan for forced heating can be achieved, bypassing a touch screen panel where the precision air conditioning is unable to start normally.

[0043] The present invention discloses a method and corresponding system for ultra-low temperature startup control of precision air conditioners in data center computer rooms. The method includes ultra-low temperature detection, a node for activating the low-temperature startup system, low-temperature safety interlock control for fans and heaters, ultra-low temperature fan control signals and methods, and control chip backflow protection measures. A temperature detection circuit automatically connects to the relevant control circuits at ultra-low temperatures. Following the ultra-low temperature direct start operation, the precision air conditioner's heater and fan are immediately activated, and both heater and fan are fully operational for rapid heating. When the ambient temperature rises to a level where normal operation can be performed via the touchscreen control panel, the heater and fan automatically shut down to alert the operator, allowing normal air conditioner setup and startup operations to resume via the control panel.

[0044] The technical problem to be solved by the present invention is to provide a method and system for ultra-low temperature startup of a computer room precision air conditioner. The method and system are improved based on the existing functional components of the computer room precision air conditioner to solve the problem that the current conventional computer room precision air conditioner is difficult to start up in an ultra-low temperature environment, make full use of the functions and investment of existing products, and expand the ambient temperature adaptability range of conventional computer room precision air conditioners.

[0045] Conventional room precision air conditioning original heating control circuit such as Figure 3 As shown, the operation and management instructions for the air-conditioning equipment are all issued through the intelligent display and control screen, and the issued temperature control instructions are used to control the operation of the heater through the inter-row air-conditioning intelligent control mainboard to achieve the control and management of the ambient temperature. If the intelligent display and control screen cannot work normally because the temperature is too low, it will not be able to issue power-on or temperature control instructions, and the computer room precision air conditioning will not work properly at this time. In order to solve the above problems, the present invention provides a method for improving control based on the existing functional components of the existing equipment of the computer room precision air conditioning. The specific circuit structure of the improvement is as follows: Figure 4 As shown, the three parts of the conversion switch HK, the temperature control module and the signal module constitute the "ultra-low temperature direct start electric control device" described below. The relevant functions and effects are further discussed below.

[0046] To achieve the above objectives, the present invention provides a method for improving control based on the existing functional components of existing equipment for precision air conditioning in computer rooms, comprising:

[0047] S1. Ultra-low temperature determination and control steps: Use the temperature control module to detect and monitor the ambient temperature, identify the ambient ultra-low temperature data and the input and output points of the ultra-low temperature direct start electronic control device.

[0048] S2. Ultra-low temperature direct start operation steps: When the ambient temperature is lower than the set value, the ultra-low temperature direct start electronic control device starts to work. Once the manual command for forced heating is issued, the ultra-low temperature direct start electronic control device directly sends control instructions to the heater and fan unit, and the precision air conditioner starts forced heating operation.

[0049] S3. Heating and temperature rise control steps: During the forced heating process, the ultra-low temperature direct start electronic control device continuously monitors the ambient temperature online. When the temperature rises to a predetermined range, the heating control circuit of the heater is automatically cut off. While the forced heating is in progress, the temperature control signal sent by the inter-row air conditioning intelligent control mainboard is interlocked to avoid backflow interference.

[0050] S4. Heating and completing normal operating steps: When the precision air-conditioning touch screen lights up and can be operated normally, or the ambient temperature has returned to the normal range, the ultra-low temperature direct start electronic control device will automatically cut off the operation of the heater and fan unit, and remind the operator to resume normal working status.

[0051] The above-mentioned method of ultra-low temperature forced start-up is based on the function of conventional computer room precision air conditioning. The ultra-low temperature direct start electronic control device inserts and interlocks signals at the fan speed control signal line, and does not change the control principle and operation process of the original computer room precision air conditioning product. This method of forced start control can minimize line changes and minimize systemic risks.

[0052] The above method for forced startup at ultra-low temperature based on the precision air conditioning function of a conventional computer room, the ultra-low temperature determination and control step further includes:

[0053] Ambient temperature detection steps: To ensure the normal function and operation of the precision air conditioners in the computer room, the low-temperature direct start function must be effective only in ultra-low temperature conditions. First, the passive detection device in the temperature control module is used to detect the ambient temperature online. When the set low temperature is reached, the precision air conditioner direct start function module in the temperature control module is activated, and the direct start heating operation is ready. When the temperature rises to the set high temperature, the direct start function is automatically disabled, and the normal control and management functions of the precision air conditioner are restored.

[0054] Direct-Start Circuit Activation Procedure: To prevent the precision air conditioner's low-temperature direct-start function from automatically initiating heating due to misoperation, the state-conversion switch HK is manually operated to directly activate heating. Without manual operation, another state cannot be activated, thus serving as a reminder of forgotten operations. This method also automatically maintains the container's temperature within the range where the precision air conditioner can normally start at low temperatures, even when all equipment in the machine room is in standby mode. This achieves safety, energy conservation, and rapid operation.

[0055] The above method for ultra-low temperature forced startup based on the conventional precision air conditioning function of the computer room, the heating and temperature control step also includes:

[0056] Heater and fan control signal assignment steps: To ensure heater heating safety, a wind pressure lock signal is pre-assigned. When the temperature falls below the set value and the system is manually switched to the precision air conditioning direct start mode, the fan high-speed operation command is first issued. Once the wind pressure reaches the set value, the heater function is activated for heating. Once the fan stops, the heater is immediately shut down. By installing a wind pressure detection probe on the temperature control module, the temperature control module will issue a corresponding control signal to shut down the heater when the fan stops.

[0057] Interlock protection action steps: In order to ensure the original performance of the precision air-conditioning system in the computer room and the safety of the control system, the electrical interlock isolation method of the control signal of the heater power supply and the ultra-low temperature direct start electronic control device is adopted. When the heating working state is directly started, the automatic operation signal path is cut off through the conversion switch HK in the "ultra-low temperature direct start electronic control device" to avoid the influence of signal backfeed interference and improve the safety and reliability of the system.

[0058] The above-mentioned method of ultra-low temperature forced startup based on the function of conventional computer room precision air conditioning, the said temperature rise completion prompt normal operation step also includes: using clearly observable phenomena to send a signal that the forced heating and temperature rise work has been completed, and after the temperature returns to the set high point, the heater and fan unit operation instructions are automatically turned off. After the fan stops running, the noise will be significantly reduced, informing the operator that the computer room precision air conditioning can be started normally, and the forced direct start conversion switch needs to be reset to the automatic operation state, otherwise it will not be able to start and run normally due to the safety interlock, and further remind the operator.

[0059] Sometimes, in order to quickly put the data node into operation when needed, it is necessary to keep the temperature inside the container within the minimum range where the precision air conditioner can automatically operate and start up. At this time, the conversion switch HK can be kept in the forced direct start state for a long time, using the lowest energy to maintain the lowest temperature range. The precision air conditioner is in a waiting state and can be turned on at any time, which is energy-saving, fast and safe.

[0060] In another embodiment of the present invention, the present invention also provides a system for implementing an ultra-low temperature forced startup method based on the conventional computer room precision air conditioning function, including a temperature / wind pressure integrated temperature detection control module and a control signal generation module.

[0061] (1) Temperature / air pressure integrated temperature detection and control module. This module includes: passive large hysteresis temperature and air pressure detection devices (i.e., the aforementioned passive detection devices and air pressure detection probes), which perform online detection and recording of ambient temperature and fan unit status data. The logic comparison and evaluation circuit then calculates the temperature and air pressure signals. When the set conditions are met, it outputs the relevant control signal and simultaneously connects the signal module control power supply and the heater power supply circuit.

[0062] (2) Control signal generation module. This module includes: a control power generation circuit and a fan control signal generator (the signal generator is a waveform generation circuit inside the signal module of the "ultra-low temperature direct start electric control device". The generated control waveform signal is sent to the EC-FAN fan operation circuit in the precision air conditioner through the conversion switch HK). It generates the working power and corresponding control waveform signal required for the system circuit to work. After performing logic analysis and evaluation, it sends the corresponding fan group operation control signal in a timely manner. After the temperature returns to the desired level, it turns off the fan group control signal in a timely manner and waits for the next operating condition to meet the instruction.

[0063] Example 1

[0064] Figure 1 It is a schematic flow chart of the method of the present invention, as shown in FIG. Figure 1 As shown, the present invention provides a computer room air conditioner ultra-low temperature direct start control method comprising:

[0065] Ultra-low temperature determination and control step S1: Use a large hysteresis temperature detection module to detect and monitor the ambient temperature, identify the ambient ultra-low temperature data and the input and output points of the ultra-low temperature control system.

[0066] Ultra-low temperature direct start operation step S2: When the ambient temperature is lower than the set value, the ultra-low temperature direct start electronic control device starts to work. Once the manual forced start and heating command is issued, the device directly sends control instructions to the heater and fan unit, and the precision air conditioner starts forced heating operation.

[0067] Heating temperature control step S3: During the forced heating process, the ultra-low temperature direct start electronic control device continuously monitors the ambient temperature online. When the temperature rises to a predetermined range, the heating circuit is automatically cut off. While forcing the temperature to rise, the original system control line signal is interlocked to avoid backfeed interference.

[0068] Heating completes normal operation step S4: When the precision air conditioner touch screen lights up and can operate normally, or the ambient temperature has returned to the normal range, the control device will automatically cut off the operation of the heater and fan unit, and remind the operator to resume normal working status.

[0069] Among them, Figure 1 As shown, the ultra-low temperature determination and control step S1 also includes:

[0070] Ambient temperature detection step S11: First, the ambient temperature is detected and compared with the pre-set low-temperature input point and temperature recovery point data to provide accurate judgment logic.

[0071] The direct start circuit is put into step S12: according to the above-mentioned ambient temperature detection data and the judgment logic, the system control power supply channel is opened in time to prepare for sending the control signal instruction.

[0072] like Figure 1 As shown, the heating temperature control step S3 also includes:

[0073] Heater and fan control signal giving step S31: To ensure the safety of the heating system, the fan high-speed operation instruction must be given first. After the wind pressure is reached, the heater function is put into heating. After the temperature is reached, the heating instruction is automatically cancelled.

[0074] Interlock protection action step S32: When the heating working state is directly started, the original signal path is cut off to avoid the influence of signal backfeed interference.

[0075] The present invention will be further described below with reference to the accompanying drawings and the above specific embodiments.

[0076] The present invention discloses a method for controlling the ultra-low temperature direct start-up of a computer room air conditioner. Figure 2 Schematic diagram of the process of the present invention, as shown in FIG. Figure 2 As shown, the method includes:

[0077] Step S110: First, a passive detection device is used to monitor the ambient temperature online. Once the ambient temperature reaches the set low point, the precision air conditioner's direct start function module is activated, and the system waits for the direct start heating operation. To ensure the normal function and operation of the precision air conditioner in the computer room, the low-temperature direct start function is only effective under ultra-low temperature conditions. Once the temperature rises to the set high point, the direct start function is automatically disabled, restoring normal control and management functions of the precision air conditioner.

[0078] Step S120: To prevent the precision air conditioner's low-temperature direct start function from automatically initiating heating due to misoperation, a manual state-switch method is used to directly activate heating. Without manual operation, another state cannot be activated, thus serving as a reminder of forgotten operations. Furthermore, this method automatically maintains the container's temperature within the range where the precision air conditioner can normally start at low temperatures, even when all equipment in the computer room is in standby mode. This achieves safety, energy conservation, and rapid operation.

[0079] Step S210: To prevent the precision air conditioner's low-temperature direct start function from automatically initiating heating due to misoperation, a manual state-switch method is used to directly activate heating. Without manual operation, another state cannot be activated, thus serving as a reminder of forgotten operations. Furthermore, this method automatically maintains the container's temperature within the range where the precision air conditioner can normally start at low temperatures, even when all equipment in the computer room is in standby mode. This achieves safety, energy conservation, and rapid operation.

[0080] Step S310: In order to ensure the safety of heater heating, the method of giving wind pressure locking signal in advance is adopted. When the temperature is lower than the set value and the precision air conditioner is manually switched to direct start working state, the fan high-speed operation instruction is given first. After the wind pressure is reached, the heater function is put into use for heating. Once the fan stops, the heater will be turned off immediately.

[0081] Step S320: In order to ensure the original performance of the precision air-conditioning system in the computer room and the safety of the control system, the method of electrical interlocking isolation of the heater power supply and control signal is adopted. When the heating working state is directly started, the original signal path is cut off to avoid the influence of signal backfeed interference and improve the safety and reliability of the system.

[0082] Step S410: Use clearly observable phenomena to issue a notification method that the forced heating and temperature rise work has been completed. After the temperature returns to the set high point, the heater and fan unit operation instructions are automatically turned off. After the fan stops running, the noise will be significantly reduced, informing the operator that the precision air conditioner in the computer room can be started normally. It is necessary to reset the forced direct start conversion switch to the automatic operation state. Otherwise, it will not be able to start and run normally due to the safety interlock, and further remind the operator.

[0083] Figure 3 This is a schematic diagram of the principle of the original machine room precision air conditioning heater and fan group control system involved in the present invention, such as Figure 3 As shown, the activation and deactivation of the heater and the control of the fan speed in the precision air conditioner must be performed through the touch control screen on the indoor host panel of the air conditioner. The user can only set the operating parameters and issue various operating instructions by clicking on the touch screen.

[0084] When the touchscreen receives heating instructions or parameters, they are sent to the precision air conditioner's control motherboard. The motherboard's CPU and other intelligent chips perform calculations and analysis on the precision air conditioner's other parameter data, then issue the corresponding heating state transition instructions based on a pre-set optimized operation strategy. The fan operation control command is sent to the EC fan's Ain port via the speed control line. After the intelligent chip detects feedback that the fan unit is running, it issues a heater start command. The motherboard controls the JR contacts to close, and the heater begins heating. When the temperature reaches the set point, the intelligent chip issues a shutdown command, and the motherboard controls the JR contacts to open, stopping the heater.

[0085] When the ambient temperature is too low, causing the touch screen performance to deteriorate or the mainboard chip operating logic to be abnormal, the power-on instructions and related control signals cannot be accurately sent, received, and calculated, and the entire system will be unable to start up or execute operating instructions. All functions of the precision air conditioner will be lost, and the heater and fan unit will not be able to operate normally to heat up. Host equipment such as servers will not be able to start up and operate normally.

[0086] The present invention provides a new control system based on a conventional computer room precision air-conditioning control system, which adopts a method based on the organic combination of the above-mentioned control system bypass direct start and conventional control technology to achieve the purpose of rapid startup and temperature increase of conventional computer room precision air-conditioning products in a -40°C environment. Figure 4 This is a schematic diagram of the circuit structure of the control system of the present invention, as shown in Figure 4 As shown, the system includes a temperature control module, a signal module, a transfer switch HK, a touch screen, an inter-row air-conditioning intelligent control mainboard, an inter-row air-conditioning internal fan unit and a heater. The temperature control module, the signal module and the transfer switch HK constitute an "ultra-low temperature direct start electronic control device". The temperature control module circuit is responsible for detecting ultra-low temperatures, the signal module circuit is responsible for generating the waveform required for temperature control, and the manually operated transfer switch HK is responsible for sending the control signal to the corresponding components to achieve the function of ultra-low temperature direct start.

[0087] in:

[0088] (1) Temperature control module: Through the passive large hysteresis temperature and wind pressure detection device, the ambient temperature and fan unit status data are detected and recorded online. The logic comparison circuit then calculates the temperature and wind pressure signal data to determine whether the ambient temperature is lower than the lower limit warning value. At the same time, when the relevant set conditions are met, the relevant operation signal is output, the signal module control power supply and the control power supply circuit of all heaters are connected, and the full-power heating operation can be immediately executed after the manual direct start operation instruction arrives.

[0089] (2) Signal module: Controls the power supply generating circuit and the fan control signal generator, generates the working power required for the system circuit and the speed control waveform signal corresponding to the original system, and sends the corresponding fan group operation control signal instruction in a timely manner after logic analysis and evaluation. The signal instruction is sent to the conversion switch HK through the output interface, and the conversion switch HK realizes the operation control of the fan, notifies the fan group to operate at the maximum air volume, and turns off the fan group control signal after the temperature returns to the appropriate level, and waits for the next operating condition to be met before continuing to work.

[0090] (3) Transfer switch HK: The transfer switch HK is connected in series between the inter-row air-conditioning intelligent control main board and the fan unit, and uses manual operation to switch between the forced direct start state and the automatic operation state. The manual operation state transfer switch method is used to directly start the heating operation in order to avoid the low-temperature direct start function of the precision air-conditioning in the computer room from automatically entering the heating operation state in the case of misoperation or cold backup, resulting in unnecessary energy waste. The transfer switch HK must be manually operated to operate another state, and it can also serve as a reminder of forgotten operations to avoid large changes in the temperature in the computer room. After the temperature returns to the set high point, the signal command for the heater and fan unit operation is automatically turned off. The noise will decrease after the fan stops running. The forced heating and temperature rise work is sent out with obvious observable phenomena to remind the operator that the precision air-conditioning in the computer room can be started normally. It is necessary to reset the transfer switch from the forced direct start state to the automatic operation state, otherwise it will not be able to start normally due to the safety interlock. If Figure 4 As shown, the transfer switch HK is connected in series between the inter-row air-conditioning intelligent control mainboard and the fan unit. When HK is manually switched to the forced direct start state, the low-temperature direct start control signal can be sent to the EC-FAN fan operation circuit in the precision air-conditioning through the transfer switch HK, thereby realizing the operation control of the fan.

[0091] In addition, this operation method can also automatically keep the temperature inside the container within the range where the precision air conditioner in the computer room can start up normally at a low temperature when all the equipment in the computer room is on standby, so that the computer can be started up immediately, safely and quickly while saving energy when needed.

[0092] In summary, the present invention provides a method and system for ultra-low temperature direct heating based on conventional computer room precision air conditioning. This method requires only minor adjustments and improvements to conventional computer room precision air conditioning products, requiring no special components, production control measures, or specialized testing and quality control methods. This method achieves the goal of forced ultra-low temperature heating with virtually no additional cost or selling price. It also significantly reduces the storage space required for valuable spare tools, saves money on the purchase of auxiliary heating devices, and is convenient, fast, and safe to use.

[0093] Compared with the method of increasing the temperature adaptability range of precision air conditioning by improving the level of display and control screen devices, this method only makes local fine-tuning improvements based on conventional products. It does not require special components and production control measures, nor does it require special testing means and quality control methods. It hardly increases costs and selling prices, and has great capital saving advantages.

[0094] Compared with the method of randomly carrying a set of auxiliary heating devices, this method does not require major changes to the original structure and control circuits. It only adds a small number of parts and performs local fine-tuning and improvements on the basis of conventional products, which can achieve the purpose of forced startup and heating at ultra-low temperatures, reduce the use of valuable spare tool storage space, save funds for purchasing auxiliary heating devices, and is easy, fast and safe to use.

[0095] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A computer room air conditioner ultra-low temperature direct start control method based on a computer room air conditioner ultra-low temperature direct start control system, characterized in that: The system includes a temperature control module, a signal module, a transfer switch HK, a touch screen, an inter-row air conditioning intelligent control mainboard, an inter-row air conditioning internal fan unit and a heater. The temperature control module, signal module and transfer switch HK constitute an ultra-low temperature direct start electric control device. The touch screen is connected to the inter-row air conditioning intelligent control mainboard, which is used to control the fan unit and heater. Temperature control module: Through passive large hysteresis temperature and wind pressure detection devices, the ambient temperature and fan unit status data are detected and recorded online. The logic comparison circuit then calculates the temperature and wind pressure signal data to determine whether the ambient temperature is lower than the lower limit warning value. At the same time, when the relevant set conditions are met, the relevant operation signal is output, and the signal module control power supply and the control power supply circuit of all heaters are connected. When the manual direct start operation command arrives, the full-power heating operation can be immediately executed; Signal module: controls the power generation circuit and fan control signal generator, generates the working power required for the system circuit and the speed control waveform signal corresponding to the original system, performs logic analysis and evaluation, and sends the corresponding fan unit operation control signal instruction in a timely manner. The signal instruction is sent to the transfer switch HK through the output interface, and the transfer switch HK realizes the operation control of the fan, notifying the fan unit to operate at the maximum air volume. After the temperature returns to the appropriate level, the fan unit control signal is turned off and the operation continues after the next operating condition is met; Transfer switch HK: The transfer switch HK is connected in series between the intelligent control mainboard of the inter-row air conditioner and the fan unit, and uses manual operation to switch between the forced direct start state and the automatic operation state; The heating is started directly by manually operating the state conversion switch. After the temperature rises to the set high point, the conversion switch is reset from the forced direct start state to the automatic operation state. The method comprises the following steps: S1. Ultra-low temperature determination and control steps: Use the temperature control module to detect and monitor the ambient temperature, identify the ambient ultra-low temperature data and the input and output points of the ultra-low temperature direct start electric control device; S2. Ultra-low temperature direct start operation steps: When the ambient temperature is lower than the set value, the ultra-low temperature direct start electronic control device starts to work. Once the manual forced start temperature increase command is issued, the ultra-low temperature direct start electronic control device directly sends control instructions to the heater and fan unit, and the air conditioner starts forced temperature increase operation; S3. Heating and temperature control steps: During the forced heating process, the ultra-low temperature direct start electronic control device continuously monitors the ambient temperature online. When the temperature rises to a predetermined range, it automatically cuts off the heater's heating control circuit. While performing forced heating, it interlocks the temperature control signal sent by the inter-row air conditioning intelligent control mainboard to avoid backfeed interference. S4. Heating and normal operation steps completed: When the air conditioner touch screen lights up and can operate normally, or the ambient temperature has returned to the normal range, the ultra-low temperature direct start electronic control device will automatically cut off the operation of the heater and fan unit, and remind the operator to resume normal working state; in, In step S3, a method of giving the wind pressure locking signal in advance is adopted. When the temperature is lower than the set value and the precision air conditioner is manually switched to the direct start working state, the fan high-speed operation instruction is given first. After the wind pressure is reached, the heater function is activated for heating. Once the fan stops, the heater will be turned off immediately.

2. The computer room air conditioner ultra-low temperature direct start control method according to claim 1, characterized in that: In step S1, the passive large hysteresis temperature detection device in the temperature control module is used to perform online detection of the ambient temperature. After reaching the set low temperature, the precision air conditioning direct start function module in the temperature control module is activated, and the direct start heating operation is waited for. When the temperature rises to the set high point on a large scale, the direct start function is automatically shielded, and the normal control and management functions of the precision air conditioner can be restored.

3. The computer room air conditioner ultra-low temperature direct start control method according to claim 2, characterized in that: By setting a wind pressure detection probe on the temperature control module, the temperature control module will send a corresponding control signal to turn off the heater when the fan stops.

4. The computer room air conditioner ultra-low temperature direct start control method according to claim 2, characterized in that: In step S2, direct start heating is performed by manually operating the state conversion switch HK. When the manual operation HK is converted to the forced direct start state, the control waveform signal is sent to the EC-FAN fan operation circuit in the precision air conditioner through the conversion switch HK.

5. The computer room air conditioner ultra-low temperature direct start control method according to claim 1, characterized in that: In step S3, the control signals of the heater power supply and the ultra-low temperature direct start electronic control device are electrically interlocked and isolated. When the heating working state is directly started, the automatic operation signal path is cut off by the conversion switch HK in the ultra-low temperature direct start electronic control device.

6. The computer room air conditioner ultra-low temperature direct start control method according to claim 5, characterized in that: In step S4, a clearly observable phenomenon is used to send a signal that the forced heating and temperature rise work has been completed. After the temperature returns to the set high point, the heater and fan unit operation instructions are automatically turned off. After the fan stops running, the noise will be significantly reduced, informing the operator that the precision air conditioner in the computer room can be started normally. The forced direct start conversion switch needs to be reset to the automatic operation state, otherwise it will not be able to start and run normally due to the safety interlock.

7. The computer room air conditioner ultra-low temperature direct start control method according to claim 1, characterized in that: Keep the transfer switch HK in the forced direct start state for a long time, use the lowest energy to maintain the lowest temperature range, and the air conditioner is in a waiting state to be turned on at any time.

8. The computer room air conditioner ultra-low temperature direct start control method according to claim 1, characterized in that: This method is applied to precision air conditioning in container data center computer rooms used outdoors.

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