Uninterruptible Power Supply

Abstract

The present invention provides an uninterruptible power supply, comprising a cabinet, a temperature measuring component, a cooling fan, a flow guide device and a control device, wherein the cabinet has an air outlet and an air inlet, the temperature measuring component comprises a plurality of temperature sensors respectively installed in different areas of the cabinet; the cooling fan comprises a multi-axis fan installed at the air outlet; the flow guide device comprises a first blade group, a second blade group, a first drive motor and a second drive motor, and the first blade group comprises a plurality of first blades arranged horizontally, and the second blade group comprises a plurality of second blades arranged vertically; the control device is respectively connected to the temperature measuring component, the cooling fan and the flow guide device by signal, and adjusts the air inlet direction of the air inlet and the air outlet direction of the air outlet according to the output signals from the plurality of temperature sensors. The present invention can reduce the heat dissipation energy consumption while ensuring the cooling effect of the uninterruptible power supply.

Description

Technical Field

[0001] The present invention relates to the field of power electronic equipment, and more particularly to an uninterruptible power supply. Background Art

[0002] An uninterruptible power supply (UPS) is a device that can provide continuous power supply to electrical equipment. It can immediately take over the power supply task when the main power is interrupted or abnormal, ensuring that the equipment connected to it will not stop working or be damaged due to sudden power outages. A certain amount of heat will be generated during the operation of the uninterruptible power supply, especially under high load or long working hours. If the heat dissipation is not good, it will cause the uninterruptible power supply to degrade in performance, shorten its life, and even cause failure.

[0003] To ensure the normal operation of the uninterruptible power supply, air outlets and fans are usually set on the top of the uninterruptible power supply cabinet, and air inlets are set on the front door panel, rear door panel and bottom of the cabinet. The fan disturbs the airflow to form an air duct inside the cabinet to achieve heat dissipation of the components in the cabinet.

[0004] However, in the above-mentioned uninterruptible power supply, some components in the cabinet generate relatively large amounts of heat during operation, and the fan adopts a fixed structure and cannot be turned, and the air inlet is also fixed, resulting in a fixed air duct inside the cabinet, making it impossible to perform targeted cooling of specific areas inside the cabinet. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a new uninterruptible power supply to address the problem that the above-mentioned uninterruptible power supply cannot specifically cool down a specific area inside a cabinet.

[0006] The technical solution of the present invention to solve the above technical problems is to provide an uninterruptible power supply, including a cabinet and a rectifier, an inverter, a battery, a DC bus capacitor, a static switch, and an inductor respectively installed in different areas of the cabinet, the cabinet having an air outlet and an air inlet, and the uninterruptible power supply also including a temperature measuring component, a cooling fan, a flow guide device, and a control device;

[0007] The temperature measurement component includes a plurality of temperature sensors respectively installed in different areas of the cabinet;

[0008] The heat dissipation fan comprises a multi-axis fan installed at the air outlet, and the multi-axis fan comprises a main shaft with fan blades installed;

[0009] The flow guide device includes a first blade group, a second blade group, a first drive motor and a second drive motor, wherein the first blade group includes a plurality of first blades arranged horizontally, the first drive motor is drivingly connected to the first blades, the second blade group includes a plurality of second blades arranged vertically, and the second drive motor is drivingly connected to the second blades;

[0010] The control device is respectively connected to the temperature measuring component, the cooling fan, and the guide device by signals, and adjusts the air inlet direction of the air inlet and the air outlet direction of the air outlet according to the output signals from the multiple temperature sensors. The control device adjusts the air outlet direction of the air outlet by controlling the swing angle of the main shaft of the multi-axis fan, and adjusts the air inlet direction of the air inlet by controlling the first drive motor to drive the first blade to rotate around the horizontal axis, and controlling the second drive motor to drive the second blade to rotate around the vertical axis.

[0011] As a further improvement of the present invention, the temperature measuring component includes a first spectral thermal imaging temperature measuring device installed in the cabinet, the control device is signal-connected to the first spectral thermal imaging temperature measuring device, and adjusts the air inlet direction of the air inlet and the air outlet direction of the air outlet according to the output signals from the first spectral thermal imaging temperature measuring device and the multiple temperature sensors.

[0012] As a further improvement of the present invention, the temperature measuring component includes a second spectral thermal imaging temperature measuring device installed outside the cabinet, the control device is signal-connected to the second spectral thermal imaging temperature measuring device, and adjusts the air inlet direction of the air inlet and the air outlet direction of the air outlet according to the output signals from the first spectral thermal imaging temperature measuring device, the second spectral thermal imaging temperature measuring device and the multiple temperature sensors.

[0013] As a further improvement of the present invention, the uninterruptible power supply includes a first wind direction and wind speed detection sensor, which is installed on the inner side or outer side of the air inlet of the cabinet. The control device is connected to the first wind direction and wind speed detection sensor signal, and adjusts the air inlet direction of the air inlet according to the output signal from the first wind direction and wind speed detection sensor.

[0014] As a further improvement of the present invention, the uninterruptible power supply includes a second wind direction and wind speed detection sensor, which is installed on the inside or outside of the air outlet of the cabinet. The control device is connected to the second wind direction and wind speed detection sensor signal, and adjusts the air outlet direction of the air outlet according to the output signal from the second wind direction and wind speed detection sensor.

[0015] As a further improvement of the present invention, the temperature sensor includes a first temperature sensor for detecting the temperature of the rectifier installation area, a second temperature sensor for detecting the temperature of the inverter installation area, a third temperature sensor for detecting the temperature of the battery installation area, a fourth temperature sensor for detecting the temperature of the DC bus capacitor installation area, a fifth temperature sensor for detecting the temperature of the input and output power cable area, a sixth temperature sensor for detecting the temperature of the static switch installation area, and a seventh temperature sensor for detecting the temperature of the inductor installation area;

[0016] The control device includes a memory, in which reference temperature ranges of all temperature sensors are stored. When the temperature of any temperature sensor exceeds the reference temperature range, the control device directs the air inlet of the air inlet toward the temperature measuring area of ​​the temperature sensor, and directs the air outlet of the air outlet away from the temperature measuring area of ​​the temperature sensor.

[0017] As a further improvement of the present invention, the temperature sensor includes a first temperature sensor for detecting the temperature of the rectifier installation area, a second temperature sensor for detecting the temperature of the inverter installation area, a third temperature sensor for detecting the temperature of the battery installation area, a fourth temperature sensor for detecting the temperature of the DC bus capacitor installation area, a fifth temperature sensor for detecting the temperature of the input and output power cable area, a sixth temperature sensor for detecting the temperature of the static switch installation area, and a seventh temperature sensor for detecting the temperature of the inductor installation area;

[0018] The control device includes a memory, in which the air outlet directions of the air outlets and the air inlet directions of the air inlets under various output signal combinations of the temperature sensors are stored; the control device obtains the corresponding air outlet direction and air inlet direction from the memory according to the real-time output signal of the temperature sensor, and controls the operation of the cooling fan and the air guide device according to the air inlet direction and the air outlet direction.

[0019] As a further improvement of the present invention, the air outlet is located at the top of the cabinet, and the multi-axis fan includes a main bracket, a sub-bracket, a main motor, a first sub-motor and a second sub-motor;

[0020] The main shaft and the main motor are installed on the main bracket, and the main motor drives the main shaft to rotate under the control of the control device; the main bracket and the first auxiliary motor are pivoted on the auxiliary bracket through a horizontally arranged first rotating shaft, and the first auxiliary motor drives the first rotating shaft to rotate under the control of the control device; the auxiliary bracket and the second auxiliary motor are installed on the cabinet through a second rotating shaft arranged horizontally and perpendicular to the first rotating shaft, and the second auxiliary motor drives the second rotating shaft to rotate under the control of the control device.

[0021] As a further improvement of the present invention, the air inlet includes a bottom air inlet located at the bottom of the cabinet, a front air inlet located at the front side panel of the cabinet, and a rear air inlet located at the rear side of the cabinet, and the front air inlet and the rear air inlet are respectively installed with the guide device;

[0022] At the front air inlet or the rear air inlet of the cabinet, the first blade group and the second blade group are arranged to overlap in the air inlet direction.

[0023] As a further improvement of the present invention, the air inlet includes a bottom air inlet located at the bottom of the cabinet, a front air inlet located at the front side panel of the cabinet, and a rear air inlet located at the rear side of the cabinet, and the front air inlet and the rear air inlet are respectively installed with the guide device;

[0024] On the front side panel of the cabinet, the area of ​​the front air inlet exceeds one third of the area of ​​the front side panel; on the rear side panel of the cabinet, the area of ​​the rear air inlet exceeds one third of the area of ​​the front side panel; the positions of the first blade group and the second blade group at the front air inlet and the first blade group and the second blade group at the rear air inlet are staggered.

[0025] The present invention has the following technical effects: according to the temperature of each area in the cabinet measured by the temperature measuring component, the operation of the cooling fan and the air guide device is controlled to make the air flow channel in the cabinet change accordingly, so that the components in different areas of the cabinet can be cooled in a targeted manner. Compared with the traditional fixed duct heat dissipation structure, it can ensure the cooling effect of the uninterruptible power supply while reducing the heat dissipation energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the uninterruptible power supply provided by an embodiment of the present invention.

[0027] Figure 2 The present invention is a schematic diagram of the connection between a control device and a temperature measuring component, a cooling fan, and a flow guiding device in an uninterruptible power supply provided by an embodiment of the present invention.

[0028] Figure 3 It is a schematic diagram of a heat dissipation fan in an uninterruptible power supply provided in an embodiment of the present invention.

[0029] Figure 4 It is a schematic diagram of the overall structure of an uninterruptible power supply provided by another embodiment of the present invention. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0031] like Figure 1 , Figure 2 As shown, it is a schematic diagram of the structure of an uninterruptible power supply provided by an embodiment of the present invention, and the uninterruptible power supply is used to provide continuous power supply for computers, servers, communication equipment, medical equipment and other equipment. The uninterruptible power supply includes a cabinet 10, a rectifier, an inverter, a battery, a DC bus capacitor, a static switch, an inductor, etc. These rectifiers, inverters, batteries, DC bus capacitors, static switches, and inductors are respectively installed in different areas of the cabinet 10, and cooperate with each other to convert the connected city power into the power required by the load. The above-mentioned cabinet 10 has an air outlet and an air inlet, and an air duct (i.e., a heat dissipation channel) is formed between the air inlet and the air outlet. The rectifier, inverter, battery, DC bus capacitor, static switch, inductor, etc. are located in the air duct between the air inlet and the air outlet, so that the heat generated by the working room of these devices can be taken away by the air flowing in from the air inlet and out of the air outlet. The specific structure and working principle of the uninterruptible power supply belong to the conventional technology in this field, and will not be repeated here.

[0032] The above-mentioned uninterruptible power supply also includes a temperature measuring component 20, a cooling fan 30, a flow guide device 40 and a control device 50, wherein the control device 50 can be integrated into the main control circuit board of the uninterruptible power supply (the control circuit board also integrates a control unit for controlling a rectifier, an inverter, etc. for power conversion), or the control device 50 can also use an independent control circuit board (the control and circuit board integrates a memory, a processor and peripheral circuits).

[0033] The temperature measuring component 20 includes a plurality of temperature sensors respectively installed in different areas of the cabinet 10. Through these temperature sensors, the temperature of different areas in the cabinet 10 (i.e., the temperature of different devices) can be obtained. The heat dissipation fan 30 includes a plurality of multi-axis fans installed at the air outlet, each multi-axis fan includes a main shaft with fan blades installed. When the main shaft rotates, the fan blades on the main shaft disturb the airflow, so that negative pressure is generated in the cabinet 10, so that the air outside the cabinet 10 enters the cabinet 10 from the air inlet, and the air in the cabinet 10 is discharged from the air outlet. By adjusting the main shaft swing of the multi-axis fan, the air outlet direction of the air outlet can be changed. Specifically, the number of multi-axis fans can be designed according to the power of the uninterruptible power supply, the application occasion, etc. Considering the flow characteristics of hot and cold air, the air inlet is usually arranged at the bottom and the lower middle part of the cabinet 10, and the heat dissipation fan 30 is usually arranged at the top of the cabinet 10. In actual application, the position and number of the air inlet and the air outlet can be adjusted as needed.

[0034] The flow guide device 40 includes a first blade group, a second blade group, a first drive motor and a second drive motor, wherein the first blade group includes a plurality of first blades arranged horizontally, and the first drive motor is connected to the first blades by driving; the second blade group includes a plurality of second blades arranged vertically, and the second drive motor is connected to the second blades by driving. That is, the plurality of first blades of the first blade group and the second blades of the second blade group are respectively distributed in a louver shape, and the first drive motor can drive the plurality of first blades to rotate along the horizontal axis respectively, and the second drive motor can drive the plurality of second blades to rotate along the vertical axis respectively, so that the direction of the airflow entering the cabinet from the air inlet changes accordingly.

[0035] The control device 50 is respectively connected to the temperature measuring component 20, the cooling fan 30, and the guide device 40 by signals, and adjusts the air inlet direction of the air inlet and the air outlet direction of the air outlet according to the output signals from the multiple temperature sensors, so that the air flow path and local flow velocity in the cabinet 10 are changed, thereby improving the heat dissipation efficiency of the local area in the cabinet 10. Specifically, the control device 50 adjusts the air outlet direction of the air outlet by controlling the swing angle of the main shaft of the multi-axis fan, and adjusts the air inlet direction of the air inlet by controlling the first drive motor to drive the first blade to rotate around the horizontal axis, and controlling the second drive motor to drive the second blade to rotate around the vertical axis.

[0036] The above-mentioned uninterruptible power supply controls the operation of the cooling fan 30 and the air guide device 40 according to the temperature of each area in the cabinet 10 measured by the temperature measuring component 20, so that the air flow channel in the cabinet 10 changes accordingly, thereby being able to perform targeted cooling of components in different areas of the cabinet 10. Compared with the traditional fixed duct heat dissipation structure, it can ensure the cooling effect of the uninterruptible power supply while reducing the heat dissipation energy consumption.

[0037] In particular, if Figure 1 As shown, the air inlet includes a bottom air inlet located at the bottom of the cabinet 10, a front air inlet located at the front side panel 11 of the cabinet 10 (for example, the front side panel 11 can be a cabinet door) and a rear air inlet located at the rear side of the cabinet 10, and the front air inlet and the rear air inlet are respectively installed with a flow guide device 40. At the front air inlet or the rear air inlet of the cabinet 10, the first blade group and the second blade group are arranged to overlap in the air inlet direction. For example, the first blade group can be located on the outside of the second blade group, and by adjusting the orientation of the first blade in the first blade group and the second blade in the second blade group, the air inlet direction of the air inlet can be changed, thereby causing the flow direction of the air entering the cabinet 10 to change accordingly.

[0038] In one embodiment of the present invention, the above-mentioned temperature sensor may specifically include a first temperature sensor for detecting the temperature of the rectifier installation area, a second temperature sensor for detecting the temperature of the inverter installation area, a third temperature sensor for detecting the temperature of the battery installation area, a fourth temperature sensor for detecting the temperature of the DC bus capacitor installation area, a fifth temperature sensor for detecting the temperature of the input and output power cable area, a sixth temperature sensor for detecting the temperature of the static switch installation area, and a seventh temperature sensor for detecting the temperature of the inductor installation area. That is, the real-time temperature of each component in the cabinet can be obtained through the above-mentioned first temperature sensor to the seventh temperature sensor.

[0039] Accordingly, the control device 50 includes a memory, in which the reference temperature ranges of all temperature sensors are stored. After obtaining the real-time temperature from each temperature sensor, the control device compares these temperatures with the reference temperature range stored in the memory, and when the temperature of any temperature sensor exceeds the reference temperature range (usually the heat generated by the device in the area measured by the temperature sensor is relatively large), the air inlet direction of the air inlet is directed toward the temperature measuring area of ​​the temperature sensor with abnormal temperature, and the air outlet direction of the air outlet is directed away from the temperature measuring area of ​​the temperature sensor with abnormal temperature, so that the flow rate of the air flowing through the above-mentioned temperature measuring area is accelerated, the heat exchange between the air and the device in the temperature measuring area is enhanced, and the temperature of the device in the temperature measuring area is reduced to the corresponding reference range, so as to ensure the continuous and reliable operation of the uninterruptible power supply. That is, the control device 50 can adjust the cooling fan 30 and the guide device 40 in real time according to the temperature measured by the temperature sensor, so that each device in the cabinet 10 is in its own normal operating temperature range.

[0040] In another embodiment of the present invention, the memory of the control device 50 can also store the air outlet direction and the air inlet direction of the air inlet under various output signal (detected temperature) combinations of multiple temperature sensors, that is, the working conditions of the cooling fan 30 and the air guide device 40 at different temperatures in various areas are stored in the memory in advance. In this way, the control device 50 can obtain the corresponding air outlet direction and air inlet direction from the memory according to the real-time output signal of the temperature sensor, and control the operation of the cooling fan 30 and the air guide device 40 according to the air inlet direction and the air outlet direction. Compared with storing the reference temperature range of each temperature sensor in the memory, this solution does not need to repeatedly debug the cooling fan 30 and the air guide device 40, and can make the components in the cabinet 10 reach a better working temperature more quickly.

[0041] In one embodiment of the present invention, the temperature measuring component 20 includes, in addition to a plurality of temperature sensors, a first spectral thermal imaging temperature measuring device installed in the cabinet 10. The control device 50 is connected to the first spectral thermal imaging temperature measuring device by signal, and can adjust the air inlet direction of the air inlet and the air outlet direction of the air outlet according to the output signals from the first spectral thermal imaging temperature measuring device and the plurality of temperature sensors. The first spectral thermal imaging temperature measuring device can obtain the temperature of different areas in the cabinet 10 by thermal imaging (i.e., detecting infrared signals), and has a larger detection range than the temperature sensor.

[0042] In addition, the temperature measuring component 20 may also include a second spectral thermal imaging temperature measuring device installed outside the cabinet 10, and the control device 50 is connected to the second spectral thermal imaging temperature measuring device by signal, and adjusts the air inlet direction of the air inlet and the air outlet direction of the air outlet according to the output signals from the first spectral thermal imaging temperature measuring device, the second spectral thermal imaging temperature measuring device and the plurality of temperature sensors. The second spectral thermal imaging temperature measuring device can detect the temperature of the air at the air inlet and the temperature of the air at the air outlet. By comparing the temperature of the air at the air inlet and the temperature of the air at the air outlet, the control device 50 can obtain the heat exchange efficiency of the air flowing through the cabinet 10, thereby adjusting the speed of the cooling fan 30 in combination with the temperature of each area in the cabinet 10. For example, when the temperature of each area in the cabinet 10 is generally high, and the temperature difference between the temperature of the air at the air inlet and the temperature of the air at the air outlet is large, the control device 50 can control the speed of the cooling fan 30 to increase.

[0043] In one embodiment of the present invention, the above-mentioned uninterruptible power supply further includes a first wind direction and wind speed detection sensor (which can be integrated into one device or can be two independent devices), and the first wind direction and wind speed detection sensor is installed on the inner side or outer side of the air inlet of the cabinet 10. The control device 50 is connected to the first wind direction and wind speed detection sensor signal, and adjusts the air inlet direction of the air inlet according to the output signal from the first wind direction and wind speed detection sensor. Through the first wind direction and wind speed detection sensor, it can be detected whether there is an obstacle at the air inlet of the cabinet 10, so that the control device 50 can adjust the air inlet direction of the guide device 40 when there is an obstacle at the air inlet to avoid the obstacle and ensure that the external air can flow smoothly into the cabinet 10.

[0044] Similarly, in one embodiment of the present invention, the uninterruptible power supply includes a second wind direction and wind speed detection sensor, which is installed on the inner side or outer side of the air outlet of the cabinet 10. The control device 50 is connected to the second wind direction and wind speed detection sensor signal, and adjusts the air outlet direction of the air outlet according to the output signal from the second wind direction and wind speed detection sensor. Through the second wind direction and wind speed detection sensor, it can be detected whether there is an obstacle at the air outlet of the cabinet 10, so that the control device 50 can adjust the air outlet direction of the cooling fan 30 when there is an obstacle at the air inlet to avoid the obstacle and ensure that the air in the cabinet can be smoothly discharged to the outside of the cabinet 10.

[0045] In one embodiment of the present invention, the air outlet is located at the top of the cabinet 10. Figure 3 As shown, each multi-axis fan includes a main bracket 31, a sub-bracket 32, a main motor, a first sub-motor and a second sub-motor, wherein the main shaft and the main motor are mounted on the main bracket 31 (the fan blades are also mounted in the main bracket 31), and the main motor drives the main shaft to rotate under the control of the control device 50, thereby driving the fan blades on the main shaft to rotate and disturbing the airflow; the main bracket 31 and the first sub-motor are pivotally connected to the sub-bracket 32 ​​through a horizontally arranged first rotating shaft 33 (for example, the first sub-motor can be mounted on the outer side of the sub-bracket 32, and the main bracket 31 is mounted on the inner side of the sub-bracket 32), and the first sub-motor drives the first rotating shaft 33 to rotate under the control of the control device 50, thereby driving the main bracket 31 to rotate around the first rotating shaft 33 as the center; the sub-bracket 32 ​​and the second sub-motor are mounted on the cabinet 10 through a second rotating shaft 34 horizontally arranged and perpendicular to the first rotating shaft 33, and the second sub-motor drives the second rotating shaft 34 to rotate under the control of the control device 50, thereby causing the sub-bracket 32 ​​to rotate around the second rotating shaft 34 as the center. In this way, the main shaft and the fan blades in the main bracket 31 can swing, so that the air outlet direction of the air outlet changes.

[0046] like Figure 4As shown, in another embodiment of the present invention, the air inlet also includes a bottom air inlet located at the bottom of the cabinet 10, a front air inlet located at the front side panel 11 of the cabinet, and a rear air inlet located at the rear side of the cabinet, and the front air inlet and the rear air inlet are respectively installed with a guide device. In this embodiment, on the front side panel of the cabinet, the area of ​​the front air inlet exceeds one third of the area of ​​the front side panel, and the area of ​​the rear air inlet also exceeds one third of the area of ​​the front side panel. In addition, there are two first blade groups 41 and two second blade groups 42 at the front air inlet on the front side panel, and the two first blade groups 41 and the two second blade groups 42 are staggered at the front air inlet; similarly, there are two staggered first blade groups 41 and two second blade groups 42 at the rear air inlet on the rear side panel, and the positions of the first blade group 41 and the second blade group 42 at the front air inlet and the first blade group 41 and the second blade group 42 at the rear air inlet are staggered, that is, the first blade group 41 at the front air inlet and the second blade group 42 at the rear air inlet are at the same height, and the second blade group 42 at the front air inlet and the first blade group 41 at the rear air inlet are at the same height. Through the above structure, the air flow direction in the cabinet 10 can be greatly changed, so that each device in the cabinet 10 is at a normal operating temperature.

[0047] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An uninterruptible power supply, comprising a cabinet and a rectifier, an inverter, a battery, a DC bus capacitor, a static switch, and an inductor respectively installed in different areas of the cabinet, wherein the cabinet has an air outlet and an air inlet, characterized in that: The uninterruptible power supply also includes a temperature measuring component, a cooling fan, a flow guiding device and a control device; The temperature measurement component includes a plurality of temperature sensors respectively installed in different areas of the cabinet; The heat dissipation fan comprises a multi-axis fan installed at the air outlet, and the multi-axis fan comprises a main shaft with fan blades installed; The flow guide device includes a first blade group, a second blade group, a first drive motor and a second drive motor, wherein the first blade group includes a plurality of first blades arranged horizontally, the first drive motor is drivingly connected to the first blades, the second blade group includes a plurality of second blades arranged vertically, and the second drive motor is drivingly connected to the second blades; The control device is respectively connected to the temperature measuring component, the cooling fan, and the guide device by signals, and adjusts the air inlet direction of the air inlet and the air outlet direction of the air outlet according to the output signals from the multiple temperature sensors. The control device adjusts the air outlet direction of the air outlet by controlling the swing angle of the main shaft of the multi-axis fan, and adjusts the air inlet direction of the air inlet by controlling the first drive motor to drive the first blade to rotate around the horizontal axis, and controlling the second drive motor to drive the second blade to rotate around the vertical axis.

2. The uninterruptible power supply according to claim 1, characterized in that: The temperature measurement component includes a first spectral thermal imaging temperature measurement device installed in the cabinet. The control device is connected to the first spectral thermal imaging temperature measurement device by signal, and adjusts the air inlet direction of the air inlet and the air outlet direction of the air outlet according to the output signals from the first spectral thermal imaging temperature measurement device and the multiple temperature sensors.

3. The uninterruptible power supply according to claim 2, characterized in that: The temperature measuring component includes a second spectral thermal imaging temperature measuring device installed outside the cabinet. The control device is signal-connected to the second spectral thermal imaging temperature measuring device, and adjusts the air inlet direction of the air inlet and the air outlet direction of the air outlet according to the output signals from the first spectral thermal imaging temperature measuring device, the second spectral thermal imaging temperature measuring device and the multiple temperature sensors.

4. The uninterruptible power supply according to claim 1, characterized in that: The uninterruptible power supply includes a first wind direction and wind speed detection sensor, which is installed on the inner side or outer side of the air inlet of the cabinet. The control device is connected to the first wind direction and wind speed detection sensor signal, and adjusts the air inlet direction of the air inlet according to the output signal from the first wind direction and wind speed detection sensor.

5. The uninterruptible power supply according to claim 1, characterized in that: The uninterruptible power supply includes a second wind direction and wind speed detection sensor, which is installed on the inside or outside of the air outlet of the cabinet. The control device is connected to the second wind direction and wind speed detection sensor signal, and adjusts the air outlet direction of the air outlet according to the output signal from the second wind direction and wind speed detection sensor.

6. The uninterruptible power supply according to claim 1, characterized in that: The temperature sensors include a first temperature sensor for detecting the temperature of the rectifier installation area, a second temperature sensor for detecting the temperature of the inverter installation area, a third temperature sensor for detecting the temperature of the battery installation area, a fourth temperature sensor for detecting the temperature of the DC bus capacitor installation area, a fifth temperature sensor for detecting the temperature of the input and output power cable area, a sixth temperature sensor for detecting the temperature of the static switch installation area, and a seventh temperature sensor for detecting the temperature of the inductor installation area; The control device includes a memory, in which reference temperature ranges of all temperature sensors are stored. When the temperature of any temperature sensor exceeds the reference temperature range, the control device directs the air inlet of the air inlet toward the temperature measuring area of ​​the temperature sensor, and directs the air outlet of the air outlet away from the temperature measuring area of ​​the temperature sensor.

7. The uninterruptible power supply according to claim 1, characterized in that: The temperature sensors include a first temperature sensor for detecting the temperature of the rectifier installation area, a second temperature sensor for detecting the temperature of the inverter installation area, a third temperature sensor for detecting the temperature of the battery installation area, a fourth temperature sensor for detecting the temperature of the DC bus capacitor installation area, a fifth temperature sensor for detecting the temperature of the input and output power cable area, a sixth temperature sensor for detecting the temperature of the static switch installation area, and a seventh temperature sensor for detecting the temperature of the inductor installation area; The control device includes a memory, in which the air outlet directions of the air outlets and the air inlet directions of the air inlets under various output signal combinations of the temperature sensors are stored; the control device obtains the corresponding air outlet direction and air inlet direction from the memory according to the real-time output signal of the temperature sensor, and controls the operation of the cooling fan and the air guide device according to the air inlet direction and the air outlet direction.

8. The uninterruptible power supply according to claim 1, characterized in that: The air outlet is located at the top of the cabinet, and the multi-axis fan includes a main bracket, a sub-bracket, a main motor, a first sub-motor and a second sub-motor; The main shaft and the main motor are installed on the main bracket, and the main motor drives the main shaft to rotate under the control of the control device; the main bracket and the first auxiliary motor are pivoted on the auxiliary bracket through a horizontally arranged first rotating shaft, and the first auxiliary motor drives the first rotating shaft to rotate under the control of the control device; the auxiliary bracket and the second auxiliary motor are installed on the cabinet through a second rotating shaft arranged horizontally and perpendicular to the first rotating shaft, and the second auxiliary motor drives the second rotating shaft to rotate under the control of the control device.

9. The uninterruptible power supply according to claim 1, characterized in that: The air inlet comprises a bottom air inlet located at the bottom of the cabinet, a front air inlet located at the front side panel of the cabinet, and a rear air inlet located at the rear side panel of the cabinet, and the front air inlet and the rear air inlet are respectively installed with the guide device; At the front air inlet or the rear air inlet of the cabinet, the first blade group and the second blade group are arranged to overlap in the air inlet direction.

10. The uninterruptible power supply according to claim 1, characterized in that: The air inlet comprises a bottom air inlet located at the bottom of the cabinet, a front air inlet located at the front side panel of the cabinet, and a rear air inlet located at the rear side panel of the cabinet, and the front air inlet and the rear air inlet are respectively installed with the guide device; On the front side panel of the cabinet, the area of ​​the front air inlet exceeds one third of the area of ​​the front side panel; on the rear side panel of the cabinet, the area of ​​the rear air inlet exceeds one third of the area of ​​the front side panel; the positions of the first blade group and the second blade group at the front air inlet and the first blade group and the second blade group at the rear air inlet are staggered.

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