Power supply control device and method for machine room air conditioner and machine room air conditioner

Abstract

The invention discloses a power supply control device and method for a machine room air conditioner and the machine room air conditioner, and the device comprises a detection unit which determines whether a main power supply is abnormal or not when the main power supply supplies power to a load of the machine room air conditioner, and if yes, sends a first switching instruction; after the strong current switching unit receives the first switching instruction, the power supply of the strong current load is switched from the main power supply to the standby power supply; the power supply conversion unit is used for converting the voltage of the main power supply to supply power to the weak current load when the power supply of the weak current load is the main power supply, and converting the voltage of the standby power supply to supply power to the weak current load when the power supply of the weak current load is the standby power supply; and after the weak current switching unit receives the first switching instruction, the power supply of the weak current load is switched from the main power supply to the standby power supply. According to the scheme, the power supply part of the machine room air conditioner is subjected to strong and weak current separation switching, the weak current part is prevented from being restarted due to power failure during switching, continuous operation of the machine room air conditioner is guaranteed, and the reliability of the machine room air conditioner and the power supply part is improved.

Description

Technical Field

[0001] This invention belongs to the field of computer room air conditioning technology, specifically relating to a power supply control device for a computer room air conditioner, a computer room air conditioner and its power supply control method, and more particularly to a dual power supply system for a computer room air conditioner based on the separation of strong and weak current, a computer room air conditioner and its power supply control method. Background Technology

[0002] In modern data centers and critical facilities, the stable operation of air conditioning in the server room is crucial. In related solutions, the dual-power supply system for server room air conditioning typically uses an automatic transfer switch (ATS) to achieve power switching. However, due to the inherent delay of the ATS during the switching process (usually more than 0.5 seconds), the controller motherboard of the server room air conditioning may restart due to power failure, affecting the continuous operation of the air conditioning system.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The purpose of this invention is to provide a power supply control device for a data center air conditioner, a data center air conditioner, and a power supply control method thereof, in order to solve the problem in related solutions where, during the power switching process using an ATS in a dual-power supply system for a data center air conditioner, the inherent delay of the ATS causes the controller motherboard of the data center air conditioner to restart due to a power outage, affecting the continuous operation of the data center air conditioner and thus affecting its operational reliability. This invention achieves the effect of separating strong and weak current circuits and switching between them in the power supply section of the data center air conditioner, preventing the weak current circuit from restarting due to a power outage, ensuring the continuous operation of the data center air conditioner, and improving the stability and reliability of the data center air conditioner and its power supply section.

[0005] This invention provides a power supply control device for a data center air conditioner. The load of the data center air conditioner includes a high-voltage load and a low-voltage load. The power supply for the data center air conditioner includes a main power supply and a backup power supply. The power supply control device for the data center air conditioner includes a detection unit, a high-voltage switching unit, a low-voltage switching unit, and a power conversion unit. The detection unit is used to determine whether the main power supply is abnormal when it supplies power to the load of the data center air conditioner. If the main power supply is determined to be abnormal, a first switching command is issued. The first switching command is used to switch the power supply to the load of the data center air conditioner from the main power supply to the backup power supply. The instructions are as follows: the high-voltage switching unit is used to switch the power supply of the high-voltage load from the main power supply to the backup power supply upon receiving the first switching instruction; the power conversion unit is used to convert the voltage of the main power supply to supply power to the low-voltage load when the power supply of the low-voltage load is the main power supply, and to convert the voltage of the backup power supply to supply power to the low-voltage load when the power supply of the low-voltage load is the backup power supply; the low-voltage switching unit is used to switch the power supply of the low-voltage load from the main power supply to the backup power supply upon receiving the first switching instruction.

[0006] In some embodiments, the system further includes: the detection unit is further configured to determine whether the main power supply has returned to normal when the backup power supply is supplying power to the load of the computer room air conditioner; if it is determined that the main power supply has returned to normal, a second switching command is issued; the second switching command is a command to switch the power supply of the load of the computer room air conditioner from the backup power supply to the main power supply; the high-voltage switching unit is further configured to switch the power supply of the high-voltage load from the backup power supply to the main power supply upon receiving the second switching command; the low-voltage switching unit is further configured to switch the power supply of the low-voltage load from the backup power supply to the main power supply upon receiving the second switching command.

[0007] In some embodiments, the power conversion unit includes: a first conversion module and a second conversion module; wherein, the output terminal of the main power supply is connected to the power supply terminal of the low-voltage load after passing through the detection unit, the first conversion module, and the low-voltage switching unit; the output terminal of the backup power supply is connected to the power supply terminal of the low-voltage load after passing through the second conversion module and the low-voltage switching unit.

[0008] In some embodiments, the high-voltage switching unit includes an automatic transfer switch.

[0009] In some implementations, the low-voltage switching unit includes a redundancy module.

[0010] In some implementations, the redundant module has a MOS transistor.

[0011] In some embodiments, the detection unit includes: an acquisition module and a control module; wherein, when the main power supply is supplying power to the load of the data center air conditioner, the detection unit determines whether the main power supply is abnormal, including: the acquisition module is used to detect the power supply parameters of the main power supply when the main power supply is supplying power to the load of the data center air conditioner; the control module is used to determine whether the power supply parameters of the main power supply exceed a set parameter range to determine whether the main power supply is abnormal: if it is determined that the power supply parameters of the main power supply exceed the set parameter range, then the main power supply is determined to be abnormal; and / or, when the backup power supply is supplying power to the load of the data center air conditioner, the detection unit determines whether the main power supply has returned to normal, including: the acquisition module is further used to detect the power supply parameters of the main power supply when the backup power supply is supplying power to the load of the data center air conditioner; the control module is further used to determine whether the power supply parameters of the main power supply have returned to within the set parameter range to determine whether the main power supply has returned to normal: if it is determined that the power supply parameters of the main power supply have returned to within the set parameter range, then the main power supply has returned to normal.

[0012] In conjunction with the above-mentioned device, the present invention further provides a computer room air conditioner, including: the power supply control device for the computer room air conditioner described above.

[0013] In conjunction with the aforementioned data center air conditioner, this invention further provides a power supply control method for a data center air conditioner, comprising: when the main power supply is supplying power to the load of the data center air conditioner, determining whether the main power supply is abnormal; if the main power supply is determined to be abnormal, issuing a first switching command; the first switching command is a command for switching the power supply of the load of the data center air conditioner from the main power supply to the backup power supply; through the high-voltage switching unit, upon receiving the first switching command, switching the power supply of the high-voltage load from the main power supply to the backup power supply; through the power conversion unit, when the power supply of the low-voltage load is the main power supply, converting the voltage of the main power supply to supply power to the low-voltage load; when the power supply of the low-voltage load is the backup power supply, converting the voltage of the backup power supply to supply power to the low-voltage load; through the low-voltage switching unit, upon receiving the first switching command, switching the power supply of the low-voltage load from the main power supply to the backup power supply.

[0014] In some embodiments, the method further includes: when the backup power supply powers the load of the computer room air conditioner, determining whether the main power supply has returned to normal; if it is determined that the main power supply has returned to normal, issuing a second switching command; the second switching command is a command to switch the power supply of the load of the computer room air conditioner from the backup power supply to the main power supply; the high-voltage switching unit also switches the power supply of the high-voltage load from the backup power supply to the main power supply upon receiving the second switching command; the low-voltage switching unit also switches the power supply of the low-voltage load from the backup power supply to the main power supply upon receiving the second switching command.

[0015] Therefore, the solution of this invention sets up a main power supply and a backup power supply for the power supply of the computer room air conditioner. An ATS is set up to switch the main and backup power supply parts of the high-voltage load of the computer room air conditioner, and a power conversion module (such as a first power module and a second power module) is set up to switch the main and backup power supply parts of the low-voltage load of the computer room air conditioner. This realizes the separation of high and low voltage power supply and the switching of high and low voltage power supply. Thus, by separating high and low voltage power supply parts of the computer room air conditioner and switching of high and low voltage power supply, the restart of the low-voltage part due to power failure is avoided, ensuring the continuous operation of the computer room air conditioner and improving the stability and reliability of the computer room air conditioner and its power supply parts.

[0016] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention.

[0017] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a structure of an embodiment of the power supply control device for a computer room air conditioner according to the present invention;

[0019] Figure 2 This is a schematic diagram of the component connection relationship of a dual power supply system for a computer room air conditioner based on the separation of strong and weak current.

[0020] Figure 3 This is a schematic diagram of the power distribution logic of a dual-power supply system for a computer room air conditioner based on the separation of strong and weak currents.

[0021] Figure 4 This is a flowchart illustrating an embodiment of the power supply control method for a computer room air conditioner according to the present invention.

[0022] Figure 5 This is a schematic flowchart of an embodiment of the method of the present invention for restoring the main power supply.

[0023] Referring to the accompanying drawings, the reference numerals in the embodiments of the present invention are as follows:

[0024] 1-ATS (Power Converter or Automatic Transfer Switch); 2-Redundant Module (i.e., a redundant module using MOSFET technology); 3-First Power Module; 4-Second Power Module; 5-Power Detection Device (i.e., Main Power Detection Device). Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0026] Considering that the proposed solution uses an ATS (Automatic Transmission System) for power switching in the dual-power supply system of the data center air conditioner, the inherent delay of the ATS can cause the controller motherboard of the data center air conditioner to restart due to power failure, affecting the continuous operation of the air conditioner and thus its operational reliability. Furthermore, in the proposed solution, the high-voltage and low-voltage circuits in the dual-power supply system are not effectively separated. Voltage fluctuations during power switching may interfere with the low-voltage control circuits, further exacerbating the instability of the dual-power supply system and affecting the operational reliability of the data center air conditioner.

[0027] To address these issues, several solutions have proposed improvements. For example, improving the mechanical or electronic switching mechanism of the ATS (such as using solid-state relays or faster control logic) can shorten the switching time (e.g., from 0.5 seconds to less than 0.1 seconds), but this still cannot ensure the data center air conditioning controller remains operational without shutting down. Another approach is to replace the ATS with a solid-state relay (SSR) or electronic switch to achieve millisecond-level switching, enabling uninterrupted operation, but this is unsuitable for high-power applications. Specifically, the voltage withstand rating is insufficient; voltage fluctuations or transient overvoltages in high-power systems can damage the semiconductor devices in the SSR, while the mechanical contacts of the ATS are more resistant to voltage fluctuations. High heat dissipation is also a concern; SSRs typically experience voltage drops during power switching, leading to excessive temperature rise under high current, requiring high heat dissipation capabilities and making them unsuitable for data center air conditioning. Furthermore, using SSRs in high-power equipment requires redundant, heat dissipation, and protection circuits, increasing system complexity and cost. In contrast, the ATS has a simpler mechanical structure, higher reliability, and lower cost.

[0028] For example, introducing a UPS (uninterruptible power supply, such as a battery-powered UPS) between two power sources can provide temporary power support during ATS switching to avoid power outages and achieve uninterrupted operation. However, it cannot separate strong and weak currents, and they are prone to interference. The inverter or static switch of the UPS may generate high-frequency noise (such as harmonic noise of the switching frequency) during switching. This noise may couple to the weak current system through the power line or ground line, causing interference.

[0029] It is evident that most of the aforementioned improvement solutions fail to effectively address the issue of the data center air conditioning controller motherboard restarting due to power failure during power switching. Furthermore, the design separating strong and weak current circuits and the application of rapid power switching technology still have shortcomings, resulting in insufficient reliability and stability of the dual-power supply system for data center air conditioning. Specifically, the inherent delay of the ATS (Automatic Power Supply System) causes a momentary power outage in the data center air conditioning controller during power switching, forcing the controller motherboard to restart. This affects the continuous operation of the data center air conditioning and may even lead to overheating or malfunctioning of equipment in the data center (such as modern data centers and critical facilities). In addition, the lack of separation between strong and weak current circuits in the dual-power supply system means that voltage fluctuations in the strong current circuit can be transmitted to the weak current control circuit through the common ground wire or electromagnetic coupling during power switching, causing distortion or false triggering of the control signals in the weak current control circuit, further reducing the reliability of the dual-power supply system. While some of the aforementioned improvement solutions optimize the response speed of power switching to some extent, technical bottlenecks remain in achieving truly uninterrupted power supply and complete separation of strong and weak current circuits, making it difficult to meet the high requirements of modern data centers and critical facilities for equipment operational stability and reliability. Therefore, there is an urgent need for a power supply solution that can achieve rapid power switching and effective separation of strong and weak currents to improve the reliability of the dual power supply system of the computer room air conditioner, thereby improving the overall reliability of the computer room air conditioner.

[0030] Therefore, the present invention proposes a power supply control device for a computer room air conditioner, specifically a dual-circuit power supply system for a computer room air conditioner based on the separation of strong and weak currents. It combines the ATS (Power Converter or Automatic Transfer Switch) 1 and the redundant module 2 to process strong and weak currents separately, realize rapid power switching and effective separation of strong and weak currents, ensure the continuous operation of the computer room air conditioner, and improve the reliability and safety of the dual-circuit power supply system for the computer room air conditioner.

[0031] According to an embodiment of the present invention, a power supply control device for a computer room air conditioner is provided. See also... Figure 1 The diagram shows a structural schematic of an embodiment of the device of the present invention. The load of the computer room air conditioner includes: high-voltage loads and low-voltage loads. High-voltage loads include compressors, fans, etc., and low-voltage loads include PLC modules, controller motherboards, etc. Specifically, Figure 2This is a schematic diagram of the component connections in a dual-power supply system for a computer room air conditioner based on the separation of strong and weak current. Figure 3 This is a power distribution logic diagram of a dual-power supply system for a computer room air conditioner based on the separation of strong and weak current. The strong current load of the computer room air conditioner is as follows: Figure 2 The load shown and Figure 3 The high-voltage load shown is a low-voltage load, such as... Figure 2 The controller shown and Figure 3 The control system shown; the power supply for the computer room air conditioner includes: a main power supply and a backup power supply, and the main power supply and the backup power supply have the same power supply capacity, that is, both the main power supply and the backup power supply can supply power to the high-voltage load and low-voltage load of the computer room air conditioner; in the solution of the present invention, as Figure 1 As shown, the power supply control device for the computer room air conditioner includes: a detection unit, a high-voltage switching unit, a low-voltage switching unit, and a power conversion unit.

[0032] The detection unit, connected to the main power supply, is used to determine whether the main power supply is abnormal when it is supplying power to the load of the computer room air conditioner. If the main power supply is abnormal, a first switching command is issued. The first switching command is used to switch the power supply of the load of the computer room air conditioner from the main power supply to the backup power supply. Of course, if the main power supply is normal, the first switching command is not issued, and the main power supply continues to supply power to the load of the computer room air conditioner.

[0033] The high-voltage switching unit is connected to the main power supply, the backup power supply, the detection unit, and the high-voltage load, respectively, and is used to switch the power supply of the high-voltage load from the main power supply to the backup power supply when the first switching command is received.

[0034] The power conversion unit can be connected to the main power supply and the backup power supply respectively, and can also be connected to the low-voltage load after passing through the low-voltage switching unit. Specifically, it is connected to the power supply of the computer room air conditioner and the low-voltage switching unit respectively, and is used to convert the voltage of the main power supply to supply power to the low-voltage load when the power supply of the low-voltage load is the main power supply; and to convert the voltage of the backup power supply to supply power to the low-voltage load when the power supply of the low-voltage load is the backup power supply.

[0035] The low-voltage switching unit is connected to both the power conversion unit and the low-voltage load, and is used to switch the power supply of the low-voltage load from the main power supply to the backup power supply when the first switching command is received.

[0036] This invention proposes a dual-power supply system for a data center air conditioner based on the separation of strong and weak current circuits. It combines an ATS (Automatic Transfer Switch) 1 and a redundant module 2 to handle strong and weak current circuits separately, achieving rapid power switching and effective separation of strong and weak currents. During power switching, it prevents the data center air conditioner's controller motherboard from restarting due to power failure, ensuring continuous operation of the air conditioner and improving the stability and reliability of the dual-power supply system. This ensures the continuous and stable operation of the data center air conditioner and data center equipment during the dual-power switching process. The data center air conditioner will naturally operate continuously; and the data center equipment relying on the air conditioner for cooling will not experience overheating and shutdown due to the continuous operation of the air conditioner.

[0037] In some embodiments, the power supply control device for the computer room air conditioner according to the present invention further includes: a process for restoring the main power supply, specifically as follows:

[0038] The detection unit is further configured to determine whether the main power supply has returned to normal when the backup power supply is supplying power to the load of the computer room air conditioner. If the main power supply is determined to have returned to normal, a second switching command is issued. The second switching command is used to switch the power supply of the load of the computer room air conditioner from the backup power supply to the main power supply. Specifically, the switching command issued by the detection unit is used to switch the power supply of the load of the computer room air conditioner from a first power supply to a second power supply, where the first power supply is one of the main power supply and the backup power supply, and the second power supply is the other of the main power supply and the backup power supply. The switching command includes both the first and second switching commands. Of course, if the main power supply is determined not to have returned to normal, the second switching command is not issued, and the backup power supply continues to supply power to the load of the computer room air conditioner.

[0039] The high-voltage switching unit is further configured to switch the power supply of the high-voltage load from the backup power supply to the main power supply upon receiving the second switching instruction.

[0040] The low-voltage switching unit is further configured to switch the power supply of the low-voltage load from the backup power supply to the main power supply upon receiving the second switching instruction.

[0041] In the solution of this invention, the dual-power-source independent power supply path design avoids a single point of failure, ensuring that both the high-voltage load and the control system can obtain redundant power supply in the event of a main power supply failure, significantly improving the overall reliability of the dual-power supply system for the computer room air conditioner. Specifically, the independent power supply path design uses physical isolation to avoid a single point of failure; the input lines, distribution cabinets, and cable paths of the two power sources are all physically isolated, ensuring that the power distribution paths have no intersections or shared nodes, and that a failure in one power source has no impact on the other.

[0042] In some embodiments, the power conversion unit includes: a first conversion module and a second conversion module, wherein the first conversion module is as follows: Figure 2 The first power module 3 and the second conversion module are shown below. Figure 2 The second power module 4 is shown.

[0043] The output terminal of the main power supply is connected to the power supply terminal of the low-voltage load after passing through the detection unit, the first conversion module, and the low-voltage switching unit.

[0044] The output of the backup power supply is connected to the power supply of the low-voltage load after passing through the second conversion module and the low-voltage switching unit.

[0045] exist Figure 2 and Figure 3 In the example shown, power modules include the first power module 3 and the second power module 4. Power modules are voltage conversion devices in the power supply system, primarily used to convert high voltage (e.g., 220V AC) to the low voltage (e.g., 24V DC) required by the controller. In this invention, the voltage conversion modules (i.e., the first power module 3 and the second power module 4) are deeply integrated with the redundancy switching module (i.e., the redundancy module 2) for the first time. An independent voltage drop design eliminates the voltage difference between the primary and backup power supplies, avoiding the risk of switching failure due to voltage mismatch in the dual-power supply system of the computer room air conditioner in related solutions. By deeply integrating the AC-CDC power module with the DC-CDC redundancy module, the system first converts the AC high voltage to DC low voltage using the AC-CDC module, and then achieves power switching through the DC-CDC redundancy module. This design allows the switching devices for weak current control and strong current loads to share the same power supply, effectively ensuring the consistency of power supply between strong and weak currents, while improving system reliability and integration. The independent voltage drop design means that both the primary and backup power supplies are equipped with AC-CDC power modules with the same parameters, and switching is achieved through independent paths, ensuring physical isolation between the two power supply lines while maintaining the consistency of the primary and backup power supply voltages.

[0046] In some implementations, the high-voltage switching unit includes an automatic transfer switch, such as an ATS (Automatic Transfer Switch).

[0047] See Figure 2and Figure 3 In the example shown, ATS (Automatic Transfer Switch) 1 automatically switches the load between the main power supply and the backup power supply. When the power detection device 5 detects a disconnection of the main power supply, ATS 1 will switch the power supply of the high-voltage load from the main power supply to the backup power supply within 0.5 to 1.0 seconds, ensuring the continuity of power supply to the high-voltage load. In the solution of this invention, dual power supply protection is provided: reliable switching of high-voltage power supplies is achieved through ATS, ensuring the continuous operation of high-power loads such as compressors in the computer room air conditioner, and avoiding shutdown of the computer room air conditioner and computer room equipment due to power interruption. Conventional dual power supply switching time is relatively long (minimum 0.5 seconds), which may lead to power interruption of the air conditioner, thereby causing equipment shutdown. Since computer room equipment is extremely sensitive to temperature fluctuations, restarting the air conditioner after a short shutdown may cause a sudden increase in local temperature, triggering the over-temperature protection mechanism of critical equipment (such as switches), and even leading to the risk of system shutdown.

[0048] In some embodiments, the low-voltage switching unit includes a redundant module 2.

[0049] In the solution of this invention, rapid power switching is achieved by using redundant power modules (i.e., redundant module 2 and backup power) to realize rapid switching of low-voltage power, with a switching time of less than 10 milliseconds, thus avoiding the restart of the controller motherboard of the computer room air conditioner due to power failure. Due to cost and space limitations, redundant configurations are rarely used in high-power computer room air conditioners. Redundant modules are rarely used for switching in computer room air conditioners because high-power redundant modules are limited by cost and space constraints. In the solution of this invention, redundant modules are used for low-voltage power and an ATS is employed, without significantly increasing cost or space requirements.

[0050] In some implementations, the redundant module 2 has a MOS transistor.

[0051] Redundant Module 2 (i.e., a redundant module using MOSFET technology): Redundant Module 2 employs MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) technology to quickly switch (in milliseconds) to the backup power supply in the event of a main power failure, ensuring continuous power supply to the control system of the computer room air conditioning. While related solutions using ATS (Automatic Transfer Switch) typically have a switching time of 0.5 to 1 second, the solution of this invention uses Redundant Module 2 (i.e., a redundant module using MOSFET technology) to achieve ultra-fast switching through the electronic switching characteristics of MOSFETs, effectively preventing the interruption of the computer room air conditioning operation due to brief power outages.

[0052] like Figure 2As shown, the dual power supply system for the computer room air conditioner based on the separation of strong and weak current includes: main power supply, backup power supply, power detection device (i.e., main power detection device) 5, first power module 3, second power module 4, ATS (power converter or automatic transfer switch) 1, redundant module (i.e., redundant module using MOSFET technology) 2, high-voltage load, and control system.

[0053] The component connection sequence is as follows: After the main power supply enters the unit, it first connects to the power detection device 5, and then splits into two paths: one path connects to the main power terminal of the ATS (Power Converter or Automatic Transfer Switch) 1, and then the output of the ATS 1 is connected to the high-voltage load; the other path connects to the input of the first power module 3, and after being transformed by the first power module 3, it is connected from the output of the first power module 3 to the main power input of the redundant module (i.e., the redundant module using MOSFET technology) 2. The backup power supply is also divided into two paths: one path is directly connected to the backup power terminal of the ATS 1; the other path is transformed by the second power module 4 and then connected to the backup power input of the redundant module 2.

[0054] High-power electrical loads (such as compressors and fans) in data center air conditioning systems have a high tolerance for power switching time. In related solutions, using an ATS (Automatic Transfer Switch) 1 to implement a 0.5-second to 1-second switching delay typically does not cause equipment downtime. However, the control system of a data center air conditioning system has a lower tolerance for switching time; using an ATS 1 to switch power will cause the control system to restart due to a power outage. Redundant modules 2 and other electronic switching devices can solve this problem, but in related solutions, redundant module-type electronic switching devices are mostly low-voltage, low-power designs. If directly used for high-power load switching, they are prone to current overload, leading to shortened device lifespan or a surge in costs. Therefore, the solution of this invention, through a dual-power independent power supply path design separating strong and weak currents, can effectively avoid the above problems.

[0055] The solution of this invention can not only meet the switching reliability requirements of high-power loads in computer room air conditioning, but also avoid the performance degradation of electronic components in the control system of computer room air conditioning caused by high power loads. At the same time, it can achieve seamless power supply transition without stopping the equipment or restarting through dual-channel independent power supply.

[0056] In some implementations, the detection unit includes an acquisition module and a control module.

[0057] The detection unit, when the main power supply is supplying power to the load of the computer room air conditioner, determines whether the main power supply is abnormal, including:

[0058] The acquisition module is used to detect the power supply parameters of the main power supply when the main power supply is supplying power to the load of the computer room air conditioner.

[0059] The control module is used to determine whether the power supply parameters of the main power supply exceed the set parameter range, so as to determine whether the main power supply is abnormal: if it is determined that the power supply parameters of the main power supply exceed the set parameter range, then the main power supply is determined to be abnormal; of course, if it is determined that the power supply parameters of the main power supply do not exceed the set parameter range, then the main power supply is determined to be normal.

[0060] And / or, the detection unit, when the backup power supply is supplying power to the load of the computer room air conditioner, determines whether the main power supply has returned to normal, including:

[0061] The acquisition module is also used to detect the power supply parameters of the main power supply when the backup power supply supplies power to the load of the computer room air conditioner.

[0062] The control module is further configured to determine whether the power supply parameters of the main power supply have recovered to within the set parameter range, so as to determine whether the main power supply has returned to normal: if it is determined that the power supply parameters of the main power supply have recovered to within the set parameter range, then it is determined that the main power supply has returned to normal; of course, if it is determined that the power supply parameters of the main power supply have not recovered to within the set parameter range, then it is determined that the main power supply has not returned to normal.

[0063] like Figure 3 As shown, the power distribution logic of the dual-power supply system for the computer room air conditioning, based on the separation of strong and weak current, includes:

[0064] Step 1: Normal operating status (main power supply is normal).

[0065] Step 2, Switching Process: Both the main power supply and the backup power supply are able to provide power normally. Main power supply and backup power supply: These are the foundation of the dual power supply system for the computer room air conditioning. The main power supply is usually AC power. The main power supply and backup power supply have exactly the same parameters, and both are always on.

[0066] In the solution of this invention, the transient fluctuations caused by power switching in the dual power supply system of the computer room air conditioner in the relevant solution are eliminated by the normally open main and backup power supply design, thereby further improving the power supply stability of the dual power supply system of the computer room air conditioner.

[0067] Step 3: Power supply detection device 5 confirms whether the main power supply is abnormal. If yes, proceed to step 4; otherwise, proceed to step 5. Power supply detection device (i.e., main power supply detection device) 5: The power supply detection device (i.e., main power supply detection device) 5 is used to monitor the voltage, frequency, and other parameters of the main power supply in real time to ensure the quality and stability of the main power supply. When the main power supply malfunctions (such as low voltage, power outage, etc.), the power supply detection device (i.e., main power supply detection device) 5 will cut off the main power supply.

[0068] Step 4: If the power detection device 5 confirms that there is no abnormality in the main power supply, then the ATS (power converter or automatic transfer switch) 1 selects the main power supply to power the high-voltage load; the redundant module (i.e., the redundant module using MOSFET technology) 2 selects the main power supply (after being stepped down by the first power module 3) to power the control system.

[0069] The high-power loads (such as compressors and fans) are stably powered by the main power supply to meet high power requirements. The control system (such as PLC and controller) is stepped down by the first power module 3 and then provided with low voltage and high reliability by the redundant module (i.e., the redundant module using MOSFET technology) 2. The dual power supply system for the computer room air conditioning is in normal operation without any switching action, and the continuity and stability of the power supply meet the requirements.

[0070] Step 5: If the power detection device 5 confirms a main power failure, it controls the power switch and then proceeds to step 6.

[0071] The power switching process is as follows: The power detection device 5 detects an abnormality in the main power supply (such as low voltage or power failure) and immediately cuts off the main power supply; the ATS (Power Converter or Automatic Transfer Switch) 1 switches the power supply of the high-voltage load from the main power supply to the backup power supply within 0.5 seconds to 1 second to ensure that the power supply of the high-voltage load is uninterrupted; the redundant module (i.e., the redundant module using MOSFET technology) 2 switches the power supply of the control system from the main power supply through the first power module to the backup power supply through the second power module 4 after step-down within milliseconds to ensure that the power supply of the control system is uninterrupted.

[0072] In this invention, high-voltage loads are seamlessly switched between mechanical and solid-state power supply via ATS (Automatic Transfer Switch) 1, preventing downtime due to power interruptions (e.g., compressors and fans do not require shutdown). The control system achieves zero-interruption power supply through millisecond-level switching of redundant modules (i.e., redundant modules utilizing MOSFET technology) 2, ensuring continuous operation of control logic and preventing control system restarts or data loss. The overall dual-power supply system for the computer room air conditioning operates with independent high-voltage and low-voltage paths, avoiding the impact of high-power loads on the electronic redundancy modules, extending equipment lifespan, and reducing costs. In this invention, a dual-channel independent switching and state synchronization mechanism achieves independent redundant power supply for high-voltage loads and the control system, while ensuring coordination during switching, preventing equipment malfunctions caused by asynchronous switching in related dual-power supply systems for computer room air conditioning.

[0073] Step 6: Main power supply recovery status, power switching process: The power detection device 5 detects that the main power supply has returned to normal and sends a recovery signal; ATS (power converter or automatic transfer switch) 1 automatically switches back to the main power supply to restore power supply to the high-voltage load; the redundant module (i.e., the redundant module using MOSFET technology) 2 synchronously switches back to the main power supply (after being stepped down by the first power module 3) to restore power supply to the control system.

[0074] Among them, for high-voltage loads: ATS (Power Converter or Automatic Transfer Switch) 1 switches back to the main power supply, restoring power supply and ensuring smooth system operation; for control systems: redundant modules (i.e., redundant modules using MOSFET technology) 2 synchronously switch back to the main power supply, ensuring consistent power supply paths and avoiding control logic confusion caused by asynchronous switching; for the overall dual-power supply system of the computer room air conditioner: through dual-channel synchronous switching, seamless connection between high-voltage and low-voltage paths is achieved, ensuring the continuity and stability of equipment operation.

[0075] In this invention, strong and weak current circuits are separated and switched separately. The switching speed for strong current is slower using an ATS (Automatic Transfer Switch), while the switching speed for weak current is extremely fast using a redundant module. The controller motherboard of the data center air conditioner does not restart due to power outages, enabling continuous operation of the data center air conditioner without shutdown. The strong and weak current separation design in this invention avoids voltage fluctuations during power switching from interfering with the weak current control circuit, improving the stability of the dual-power supply system of the data center air conditioner. The ATS 1 achieves power switching through a mechanical structure. Limited by mechanical response speed, the switching time is usually slow. Although it does not cause power outages to high-power loads, it may trigger a shutdown and restart of the control system (i.e., the controller motherboard of the data center air conditioner). The redundant module 2, based on a chip with integrated MOSFET technology, performs rapid switching. Although it cannot withstand high-power power supplies, it ensures that the control system (i.e., the controller motherboard of the data center air conditioner) does not experience a shutdown and restart. In the solution of this invention, the ATS (Power Converter or Automatic Transfer Switch) 1 and the redundant module 2 are used together to separate the high-voltage and low-voltage power supplies, which significantly improves the reliability and safety of the dual power supply system for the computer room air conditioner.

[0076] By adopting the technical solution of this invention, a main power supply and a backup power supply are set up for the power supply of the computer room air conditioner. An ATS is set up to switch the main and backup power supply parts of the high-voltage load of the computer room air conditioner, and a power conversion module (such as a first power supply module and a second power supply module) is set up to switch the main and backup power supply parts of the low-voltage load of the computer room air conditioner. This realizes the separation of high and low voltage power supply and the switching of high and low voltage power supply. Therefore, by separating the high and low voltage power supply parts of the computer room air conditioner and switching them, the restart of the low-voltage parts due to power failure is avoided, ensuring the continuous operation of the computer room air conditioner and improving the stability and reliability of the computer room air conditioner and its power supply parts.

[0077] According to an embodiment of the present invention, a data center air conditioner corresponding to a power supply control device for a data center air conditioner is also provided. This data center air conditioner may include the power supply control device for the data center air conditioner described above.

[0078] Since the processing and functions implemented by the computer room air conditioner in this embodiment are basically the same as those in the embodiments, principles and examples of the device, any details not covered in this embodiment can be found in the relevant descriptions in the foregoing embodiments, and will not be repeated here.

[0079] According to embodiments of the present invention, a power supply control method for a data center air conditioner is also provided, such as... Figure 4 The diagram shows a flowchart of an embodiment of the method of the present invention. The power supply control method for the computer room air conditioner may include steps S110 to S140.

[0080] In step S110, when the main power supply is supplying power to the load of the computer room air conditioner, it is determined whether the main power supply is abnormal: if it is determined that the main power supply is abnormal, a first switching command is issued; the first switching command is an instruction to switch the power supply of the load of the computer room air conditioner from the main power supply to the backup power supply; of course, if it is determined that the main power supply is normal, the first switching command is not issued, and the main power supply continues to supply power to the load of the computer room air conditioner.

[0081] In step S120, upon receiving the first switching command, the power supply of the high-voltage load is switched from the main power supply to the backup power supply via the high-voltage switching unit.

[0082] In step S130, the power conversion unit converts the voltage of the main power supply to supply power to the weak electrical load when the power supply for the weak electrical load is the main power supply; and converts the voltage of the backup power supply to supply power to the weak electrical load when the power supply for the weak electrical load is the backup power supply.

[0083] In step S140, upon receiving the first switching command, the low-voltage switching unit switches the power supply of the low-voltage load from the main power supply to the backup power supply.

[0084] The present invention proposes a dual-power supply system for a computer room air conditioner based on the separation of strong and weak currents. It combines an ATS (Automatic Transfer Switch) 1 and a redundant module 2 to process strong and weak currents separately, achieving rapid power switching and effective separation of strong and weak currents. During power switching, it avoids the computer room air conditioner's controller motherboard restarting due to power failure, ensuring the continuous operation of the computer room air conditioner, improving the stability and reliability of the dual-power supply system, and ensuring the continuous and stable operation of the computer room air conditioner and computer room equipment during the dual-power supply switching process.

[0085] In some embodiments, the power supply control method for the computer room air conditioner described in the present invention further includes: a process of restoring the main power supply.

[0086] The following is combined with Figure 5 The schematic diagram shown is a flowchart of an embodiment of the method of the present invention for restoring the main power supply, which further illustrates the specific process of restoring the main power supply, including steps S210 to S230.

[0087] Step S210: When the backup power supply is supplying power to the load of the computer room air conditioner, determine whether the main power supply has returned to normal. If it is determined that the main power supply has returned to normal, a second switching command is issued. The second switching command is used to switch the power supply to the load of the computer room air conditioner from the backup power supply to the main power supply. Specifically, the switching command issued by the detection unit is used to switch the power supply to the load of the computer room air conditioner from a first power supply to a second power supply. The first power supply is one of the main power supply and the backup power supply, and the second power supply is the other of the main power supply and the backup power supply. The switching command includes a first switching command and a second switching command. Of course, if it is determined that the main power supply has not returned to normal, the second switching command is not issued, and the backup power supply continues to supply power to the load of the computer room air conditioner.

[0088] In step S220, the high-voltage switching unit, upon receiving the second switching command, switches the power supply of the high-voltage load from the backup power supply to the main power supply.

[0089] In step S230, the low-voltage switching unit, upon receiving the second switching command, switches the power supply of the low-voltage load from the backup power supply to the main power supply.

[0090] In the solution of this invention, the design of dual power supply independent power supply paths avoids a single point of failure and ensures that both the high-voltage load and the control system can obtain redundant power supply when the main power supply fails, which significantly improves the overall reliability of the dual power supply system of the computer room air conditioner.

[0091] In some embodiments, the power conversion unit includes: a first conversion module and a second conversion module, wherein the first conversion module is as follows: Figure 2 The first power module 3 and the second conversion module are shown below. Figure 2 The second power module 4 is shown.

[0092] The output terminal of the main power supply is connected to the power supply terminal of the low-voltage load after passing through the detection unit, the first conversion module, and the low-voltage switching unit.

[0093] The output of the backup power supply is connected to the power supply of the low-voltage load after passing through the second conversion module and the low-voltage switching unit.

[0094] exist Figure 2 and Figure 3In the example shown, the power modules are such as the first power module 3 and the second power module 4. The power module is a voltage conversion device in the power supply system, mainly used to convert high voltage (e.g., 220V AC) to the low voltage (e.g., 24V DC) required by the controller. In the solution of this invention, the voltage conversion module (i.e., the first power module 3 and the second power module 4) is deeply integrated with the redundancy switching module (i.e., the redundancy module 2) for the first time. An independent step-down design eliminates the voltage difference between the main and backup power supplies, avoiding the risk of switching failure due to voltage mismatch in the dual-power supply system of the computer room air conditioner in related solutions.

[0095] In some implementations, the high-voltage switching unit includes an automatic transfer switch, such as an ATS (Automatic Transfer Switch).

[0096] See Figure 2 and Figure 3 In the example shown, ATS (Automatic Transfer Switch) 1 automatically switches the load between the main power supply and the backup power supply. When the power detection device 5 detects a disconnection of the main power supply, ATS 1 will switch the power supply of the high-voltage load from the main power supply to the backup power supply within 0.5 seconds to 1.0 second, ensuring the continuity of power supply to the high-voltage load. In the solution of this invention, dual power supply protection is provided: reliable switching of high-voltage power supplies is achieved through ATS, ensuring the continuous operation of high-power loads such as compressors in the computer room air conditioner, and preventing the computer room air conditioner and computer room equipment from shutting down due to power outages.

[0097] In some embodiments, the low-voltage switching unit includes a redundant module 2.

[0098] In the solution of this invention, rapid power switching is achieved by using redundant power modules (i.e., redundant module 2 and backup power) to realize rapid switching of low-voltage power, with a switching time of less than 10 milliseconds, thus avoiding the restart of the controller motherboard of the computer room air conditioner due to power failure. Due to cost and space limitations, redundant settings are rarely used in high-power computer room air conditioners.

[0099] In some implementations, the redundant module 2 has a MOS transistor.

[0100] Redundant Module 2 (i.e., a redundant module using MOSFET technology): Redundant Module 2 employs MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) technology to quickly switch (in milliseconds) to the backup power supply in the event of a main power failure, ensuring continuous power supply to the control system of the computer room air conditioning. While related solutions using ATS (Automatic Transfer Switch) typically have a switching time of 0.5 to 1 second, the solution of this invention uses Redundant Module 2 (i.e., a redundant module using MOSFET technology) to achieve ultra-fast switching through the electronic switching characteristics of MOSFETs, effectively preventing the interruption of the computer room air conditioning operation due to brief power outages.

[0101] like Figure 2 As shown, the dual power supply system for the computer room air conditioner based on the separation of strong and weak current includes: main power supply, backup power supply, power detection device (i.e., main power detection device) 5, first power module 3, second power module 4, ATS (power converter or automatic transfer switch) 1, redundant module (i.e., redundant module using MOSFET technology) 2, high-voltage load, and control system.

[0102] The component connection sequence is as follows: After the main power supply enters the unit, it first connects to the power detection device 5, and then splits into two paths: one path connects to the main power terminal of the ATS (Power Converter or Automatic Transfer Switch) 1, and then the output of the ATS 1 is connected to the high-voltage load; the other path connects to the input of the first power module 3, and after being transformed by the first power module 3, it is connected from the output of the first power module 3 to the main power input of the redundant module (i.e., the redundant module using MOSFET technology) 2. The backup power supply is also divided into two paths: one path is directly connected to the backup power terminal of the ATS 1; the other path is transformed by the second power module 4 and then connected to the backup power input of the redundant module 2.

[0103] High-power electrical loads (such as compressors and fans) in data center air conditioning systems have a high tolerance for power switching time. In related solutions, using an ATS (Automatic Transfer Switch) 1 to implement a 0.5-second to 1-second switching delay typically does not cause equipment downtime. However, the control system of a data center air conditioning system has a lower tolerance for switching time; using an ATS 1 to switch power will cause the control system to restart due to a power outage. Redundant modules 2 and other electronic switching devices can solve this problem, but in related solutions, redundant module-type electronic switching devices are mostly low-voltage, low-power designs. If directly used for high-power load switching, they are prone to current overload, leading to shortened device lifespan or a surge in costs. Therefore, the solution of this invention, through a dual-power independent power supply path design separating strong and weak currents, can effectively avoid the above problems.

[0104] The solution of this invention can not only meet the switching reliability requirements of high-power loads in computer room air conditioning, but also avoid the performance degradation of electronic components in the control system of computer room air conditioning caused by high power loads. At the same time, it can achieve seamless power supply transition without stopping the equipment or restarting through dual-channel independent power supply.

[0105] Since the processing and functions implemented by the method in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned computer room air conditioner, any details not covered in the description of this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0106] In summary, it is readily understood by those skilled in the art that, without conflict, the aforementioned advantageous methods can be freely combined and superimposed.

[0107] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A power supply control device for a computer room air conditioner, characterized in that, The load of the computer room air conditioner includes: high-voltage load and low-voltage load; the power supply of the computer room air conditioner includes: main power supply and backup power supply; the power supply control device of the computer room air conditioner includes: detection unit, high-voltage switching unit, low-voltage switching unit, and power conversion unit; wherein, The detection unit is used to determine whether the main power supply is abnormal when the main power supply is supplying power to the load of the computer room air conditioner; if the main power supply is determined to be abnormal, a first switching command is issued; the first switching command is a command to switch the power supply of the load of the computer room air conditioner from the main power supply to the backup power supply. The high-voltage switching unit is used to switch the power supply of the high-voltage load from the main power supply to the backup power supply when the first switching instruction is received. The power conversion unit is used to convert the voltage of the main power supply to supply power to the weak electrical load when the power supply for the weak electrical load is the main power supply; and to convert the voltage of the backup power supply to supply power to the weak electrical load when the power supply for the weak electrical load is the backup power supply. The low-voltage switching unit is used to switch the power supply of the low-voltage load from the main power supply to the backup power supply when the first switching instruction is received.

2. The power supply control device for the computer room air conditioner according to claim 1, characterized in that, Also includes: The detection unit is further configured to determine whether the main power supply has returned to normal when the backup power supply is supplying power to the load of the computer room air conditioner; if it is determined that the main power supply has returned to normal, a second switching command is issued; the second switching command is a command to switch the power supply of the load of the computer room air conditioner from the backup power supply to the main power supply. The high-voltage switching unit is further configured to switch the power supply of the high-voltage load from the backup power supply to the main power supply upon receiving the second switching instruction. The low-voltage switching unit is further configured to switch the power supply of the low-voltage load from the backup power supply to the main power supply upon receiving the second switching instruction.

3. The power supply control device for the computer room air conditioner according to claim 1 or 2, characterized in that, The power conversion unit includes: a first conversion module and a second conversion module; wherein, The output terminal of the main power supply is connected to the power supply terminal of the low-voltage load after passing through the detection unit, the first conversion module, and the low-voltage switching unit. The output of the backup power supply is connected to the power supply of the low-voltage load after passing through the second conversion module and the low-voltage switching unit.

4. The power supply control device for the computer room air conditioner according to claim 1 or 2, characterized in that, The high-voltage switching unit includes: an automatic transfer switch.

5. The power supply control device for a computer room air conditioner according to claim 1 or 2, characterized in that, The low-voltage switching unit includes: a redundant module (2).

6. The power supply control device for the computer room air conditioner according to claim 5, characterized in that, The redundant module (2) has a MOS transistor.

7. The power supply control device for a computer room air conditioner according to claim 1 or 2, characterized in that, The detection unit includes: an acquisition module and a control module; in, The detection unit, when the main power supply is supplying power to the load of the computer room air conditioner, determines whether the main power supply is abnormal, including: The acquisition module is used to detect the power supply parameters of the main power supply when the main power supply supplies power to the load of the computer room air conditioner. The control module is used to determine whether the power supply parameters of the main power supply exceed the set parameter range, so as to determine whether the main power supply is abnormal: if it is determined that the power supply parameters of the main power supply exceed the set parameter range, then the main power supply is determined to be abnormal. And / or, The detection unit, when the backup power supply is supplying power to the load of the computer room air conditioner, determines whether the main power supply has returned to normal, including: The acquisition module is also used to detect the power supply parameters of the main power supply when the backup power supply supplies power to the load of the computer room air conditioner. The control module is further configured to determine whether the power supply parameters of the main power supply have recovered to within the set parameter range, so as to determine whether the main power supply has returned to normal: if it is determined that the power supply parameters of the main power supply have recovered to within the set parameter range, then it is determined that the main power supply has returned to normal.

8. A computer room air conditioner, characterized in that, include: The power supply control device for the computer room air conditioner as described in any one of claims 1 to 7.

9. A power supply control method for a computer room air conditioner as described in claim 8, characterized in that, include: When the main power supply is supplying power to the load of the computer room air conditioner, determine whether the main power supply is abnormal: if the main power supply is determined to be abnormal, issue a first switching command; the first switching command is a command used to switch the power supply of the load of the computer room air conditioner from the main power supply to the backup power supply. Upon receiving the first switching command, the power supply to the high-voltage load is switched from the main power supply to the backup power supply via the high-voltage switching unit. The power conversion unit converts the voltage of the main power supply to supply power to the weak electrical load when the power supply for the weak electrical load is the main power supply; and converts the voltage of the backup power supply to supply power to the weak electrical load when the power supply for the weak electrical load is the backup power supply. Upon receiving the first switching command, the low-voltage switching unit switches the power supply of the low-voltage load from the main power supply to the backup power supply.

10. The power supply control method for a computer room air conditioner according to claim 9, characterized in that, Also includes: When the backup power supply supplies power to the load of the computer room air conditioner, determine whether the main power supply has returned to normal: if it is determined that the main power supply has returned to normal, issue a second switching command; the second switching command is a command used to switch the power supply of the load of the computer room air conditioner from the backup power supply to the main power supply. The high-voltage switching unit can also switch the power supply of the high-voltage load from the backup power supply to the main power supply upon receiving the second switching command. The low-voltage switching unit can also switch the power supply of the low-voltage load from the backup power supply to the main power supply upon receiving the second switching command.

Images