Air-cooled power supply module derating test equipment

Abstract

The utility model discloses a derating test device for an air-cooled power supply module, and the device comprises a fan which is provided with an air inlet end and an air outlet end; the head end of the circulating air channel is in butt joint with the air outlet end, the tail end of the circulating air channel is in butt joint with the air inlet end, an air outlet, an air inlet, a heating part and a testing part are sequentially arranged on the circulating air channel according to the flowing direction of air in the circulating air channel, the air inlet is provided with an air inlet valve, an air outlet valve is arranged at the air outlet, and a circulating air valve is arranged in the circulating air channel between the air outlet and the air inlet; the air inlet air valve and the air outlet air valve are closed, the circulating air valve is opened, air internal circulation in the circulating air duct can be formed, the temperature in the circulating air duct is rapidly increased, the air inlet air valve and the air outlet air valve are opened, the circulating air valve is closed, air circulation from outside to inside is formed, and the interior of the circulating air duct is cooled.

Description

Technical Field

[0001] The utility model relates to the field of power supply testing, in particular to a derating testing device for an air-cooled power supply module. Background Art

[0002] Derating testing involves measuring the sustainable power output of a power supply or module at a set ambient temperature. This testing generates a derating curve, allowing users to safely use the power supply or module at that ambient temperature and output power. This demonstrates the reliability of the power supply or module.

[0003] Traditional testing equipment includes a straight air duct equipped with a heating module and a product placement platform. The duct has air vents at both ends, with one vent connected to a fan. During testing, the product is placed on the product placement platform. The heating module raises the temperature within the duct, while the fan creates air flow within the duct. Together, the heating module and fan create a test environment. However, because the fan moves air through the duct, the duct has two air vents. Cold air enters the duct through the fan, and air heated by the heating module is discharged out of the duct. This constant heating of the cold air causes the ambient temperature at the test module to rise slowly. Utility Model Content

[0004] In order to overcome the disadvantage of the prior art that the fan in the traditional test equipment blows the air into the straight air duct, the straight air duct has two air outlets, cold air enters the straight air duct through the fan, and the air heated by the heating module is discharged out of the straight air duct. The heating of the cold air causes the ambient temperature at the test module to rise slowly, the utility model provides an air-cooled power module derating test device, comprising:

[0005] A fan having an air inlet end and an air outlet end;

[0006] The circulating air duct is connected to the air outlet at the front end and the air inlet at the rear end. According to the flow direction of air in the circulating air duct, an air outlet, an air inlet, a heating part and a testing part are sequentially provided on the circulating air duct. The air inlet is provided with an air inlet valve, and the air outlet is provided with an air outlet valve. A circulating air valve is provided in the circulating air duct between the air outlet and the air inlet.

[0007] Optionally, the circulating air duct includes a first air duct, a second air duct, a third air duct, a fourth air duct, a test air duct, a fifth air duct, and a sixth air duct connected in sequence, the air outlet is opened on the first air duct, the air inlet is opened on the second air duct, and the first air duct and the second air duct are connected through a circulating air valve.

[0008] Optionally, the testing unit includes:

[0009] The placement table is installed in the test air duct and is used to place the product to be tested;

[0010] A sealing cover is provided with a transparent observation window, the test air duct is provided with an opening, and is detachably mounted at the top opening of the test air duct, with the transparent observation window facing the placement table;

[0011] The data acquisition device is installed outside the circulating air duct. The test air duct is provided with a wire hole. The wire passes through the wire hole on the test air duct and is electrically connected to the product to be tested on the placement table.

[0012] Optionally, a temperature sensor, a smoke alarm and a flow equalizing plate are provided in the test air duct.

[0013] Optionally, a through hole is provided on the side of the test air duct, and a wind speed anemometer is installed in the through hole.

[0014] Optionally, the outer surface of the circulating air duct is covered with thermal insulation cotton.

[0015] Optionally, the heating unit includes a heating tube, and the heating tube is fixed in the second air duct.

[0016] Optionally, a chassis is included, and the fan and the circulating air duct are fixed on the chassis.

[0017] Optionally, a support frame is provided on the chassis, and a plurality of spaced-apart partitions are provided on the support frame.

[0018] Optionally, the chassis is provided with exhaust holes on both sides, and an exhaust fan is provided at the exhaust holes on one side.

[0019] The beneficial effects of the utility model are as follows: an air-cooled power module is placed in the test section, the circulation air valve is opened, the air inlet valve at the air inlet is closed, and the air outlet valve at the air outlet is closed, so that an internal circulation air circulation is formed in the circulation duct, the fan is turned on, and air is blown out from the air outlet end through the heating section, the air is heated by the heating section, the heated air passes through the test section, and then the air returns from the end of the circulation duct to the air inlet end of the fan, and the air is blown from the air outlet end of the fan to the heating section again, and the cycle is repeated. The air in the circulation duct continuously passes through the heating section and the test section, and the temperature at the test module can rise to a predetermined temperature in a short time, so that the temperature in the circulation duct is kept moderate and constant. If the temperature in the circulation duct exceeds the predetermined temperature, the air outlet valve at the air outlet and the air outlet valve at the air inlet can be opened, and then the circulation air valve in the circulation duct is closed, and air enters the circulation duct from the air inlet and then flows out from the air outlet. The cold air entering from the air inlet reduces the temperature in the circulation duct, so that the test environment temperature is reduced to the predetermined temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 is an assembly diagram in some embodiments;

[0022] Figure 2 is a schematic diagram of some structures in some embodiments;

[0023] Figure 3 is a schematic diagram of some structures in some embodiments;

[0024] Figure 4 Schematic diagram of the structure of the circulating air duct and the fan in some embodiments;

[0025] Figure 5 is a schematic structural diagram of the second air duct in some embodiments;

[0026] Figure 6 is a schematic structural diagram of a test air duct and a test unit in some embodiments;

[0027] Figure 7 1 is a structural exploded diagram of the test duct and the test part in some embodiments.

[0028] Description of reference numerals:

[0029] 1. Fan; 2. Circulating air duct; 3. Test unit; 4. Chassis; 201. Inlet air valve; 202. Outlet air valve; 203. Circulating air valve; 204. First air duct; 205. Second air duct; 206. Third air duct; 207. Fourth air duct; 208. Test air duct; 209. Fifth air duct; 210. Sixth air duct; 301. Placement table; 302. Sealing cover; 303. Transparent observation window; 304. Data acquisition device; 211. Wire hole; 212. Smoke alarm; 213. Flow equalizing plate; 214. Anemometer; 215. Heating tube; 216. Temperature sensor; 401. Support frame; 402. Partition; 403. Exhaust hole; 404. Exhaust fan. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by technical personnel in this field without creative work are within the scope of protection of the present invention. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the present invention can be combined interactively without conflicting with each other.

[0031] The present invention provides a derating test device for air-cooled power modules, which is used for derating tests of air-cooled power modules. The device comprises: a fan 1 having an air inlet and an air outlet; a circulating air duct 2, with its head end connected to the air outlet and its tail end connected to the air inlet. Following the direction of air flow within the circulating air duct 2, the circulating air duct 2 is sequentially provided with an air outlet, an air inlet, a heating unit, and a testing unit 3. The air inlet is provided with an air inlet valve 201, and the air outlet is provided with an air outlet valve 202. A circulating air valve 203 is provided within the circulating air duct 2 between the air outlet and the air inlet. The heating unit is used to increase the temperature within the circulating air duct 2, and the testing unit 3 is used to place products and collect test data.

[0032] During implementation, the head end of the circulating air duct 2 is connected to the air outlet end of the fan 1, and the end of the circulating air duct 2 is connected to the air inlet end of the fan 1. The testing part 3 and the heating part are installed in the circulating air duct 2. The air outlet valve 202 is installed at the air outlet of the circulating air duct 2. The screw rod and the air inlet valve 201 are turned at the air inlet of the circulating air duct 2. The circulating air valve 203 is installed in the circulating air duct 2 between the air inlet and the air outlet; the air cooling power module is placed in the testing part 3, the circulating air valve 203 is opened, the air inlet valve 201 at the air inlet is closed, and the air outlet valve 202 at the air outlet is closed to form an internal circulation air circulation in the circulating air duct 2, and the fan 1 is turned on to blow air from the air outlet end through the heating part. The air is heated by the heating part, and the heated air passes through the testing part. The air then returns from the end of the circulating duct 2 to the air inlet end of the fan 1, and the air is blown from the air outlet end of the fan 1 to the heating part, and the cycle repeats. The air in the circulating duct 2 continuously passes through the heating part and the testing part 3. The temperature at the testing module can rise to the predetermined temperature in a short time, so that the temperature in the circulating duct 2 is kept moderate and constant. If the temperature in the circulating duct 2 exceeds the predetermined temperature, the outlet valve 202 at the air outlet and the outlet valve 202 at the air inlet can be opened, and then the circulating valve 203 in the circulating duct 2 can be closed. The air enters the circulating duct 2 from the air inlet and then flows out from the air outlet. The cold air entering from the air inlet reduces the temperature in the circulating duct 2, so that the test environment temperature is reduced to the predetermined temperature. Figure 2 As shown, closing the air inlet valve 201 and the air outlet valve 202 and opening the circulation valve 203 can form an internal circulation of air in the circulation duct 2, and the temperature in the circulation duct 2 can be quickly increased. Figure 3 As shown, the air inlet valve 201 and the air outlet valve 202 are opened, and the circulating air valve 203 is closed to form air circulation from the outside to the inside to cool the circulating air duct 2; by completing two different air circulation modes in one circulating air duct 2, heating and cooling are achieved in the circulating air duct 2, and the arrow indicates the direction of air flow.

[0033] Specifically, the fan 1 uses a variable-frequency centrifugal fan 1. The air-cooled power module derating test equipment is equipped with a PLC control system. The variable-frequency centrifugal fan 1 can receive control commands from the PLC control system to change the wind speed, thereby changing the test environment. The heating element in the heating module can be a controllable heating wire, heating tube 215, or other component. Controllable means that the temperature can be adjusted and controlled. The air-cooled power module derating test equipment provided by the utility model can change the wind speed and internal temperature within the circulating air duct 2, thereby creating different test environments to accommodate power modules of different specifications and complete the test.

[0034] In some embodiments, the circulating air duct 2 includes a first air duct 204, a second air duct 205, a third air duct 206, a fourth air duct 207, a test air duct 208, a fifth air duct 209, and a sixth air duct 210 that are connected in sequence. The air outlet is opened on the first air duct 204, and the air inlet is opened on the second air duct 205. The first air duct 204 and the second air duct 205 are connected through a circulating air valve 203.

[0035] During implementation, the first air duct 204 is connected to the second air duct 205 through the circulation air valve 203, and the second air duct 205, the third air duct 206, the fourth air duct 207, the test air duct 208, the fifth air duct 209, and the sixth air duct 210 are connected in sequence to form an air duct with a long air duct. The first air duct 204 at the head is connected to the air outlet end of the fan 1, and the sixth air duct 210 at the tail is connected to the air inlet end of the fan 1, thereby forming an air duct in which air can circulate. An air outlet is provided on the first air duct 204, and an air outlet valve 202 is installed at the air outlet. An air inlet is provided on the second air duct 205, and an air inlet valve 201 is installed at the air inlet. The air inlet valve 201 and the air outlet valve 202 are closed, and the circulation air valve 203 is opened. The air is blown out by the fan 1 through the first air duct 204, passes through the circulation air valve 203 and flows into the second square duct, and then flows back to the second square duct according to the above. After entering the second air duct 205, the air flows through the third air duct 206, the fourth air duct 207, the test air duct 208, the fifth air duct 209, and the sixth air duct 210, and finally enters the air inlet end of the fan 1. The fan 1 then blows the air into the first air duct 204 to complete the air circulation. The air inlet valve 201 and the air outlet valve 202 are opened, and the circulation air valve 203 is closed. The air discharged from the air outlet end of the fan 1 does not enter the second air duct 205, but flows out from the air outlet of the first air duct 204. The air is discharged from the air outlet, and the air inlet of the second air duct 205 enters. After entering from the second air duct 205, the air flows through the third air duct 206, the fourth air duct 207, the test air duct 208, the fifth air duct 209, and the sixth air duct 210, and finally enters the air inlet end of the fan 1. This reciprocating cycle completes the entry and exhaust of external air.

[0036] Specifically, each air duct has two air outlets. The third air duct 206 connected to the second air duct 205 is a U-shaped curved pipe. The diameters of the two ends of the third air duct 206 are different. The diameter of one end connected to the second air duct 205 is the same as the diameter of the second air duct 205. The diameter of one end connected to the fourth air duct 207 is the same as the fourth air duct 207. The diameter of the end of the second air duct 205 connected to the third air duct 206 is larger than the diameter of the first end of the fourth air duct 207 connected to the third air duct 206. The diameter of the third air duct 206 gradually decreases from the second air duct 205 to the fourth air duct. The diameters of the two ends of the fourth air duct 207 are also different. The fourth air duct 207 is connected to the third air duct 206. The diameter is larger than the diameter of one end of the test air duct 208 connected to the fourth air duct 207, that is, the diameter of the fourth air duct 207 gradually becomes smaller from the third air duct 206 to the test air duct 208. The third air duct 206 and the fourth air duct 207 are air ducts with gradually smaller diameters, so that the temperature of the air reaching the test air duct 208 is uniform. The fifth air duct 209 has two pipe openings, one of which is located at one end of the fifth air duct 209, and the other pipe opening is located at the bottom of the fifth air duct 209. The sixth air duct 210 is connected to the air outlet at the bottom of the fifth air duct 209, and the test air duct 208 is connected to the air outlet on the side of the fifth air duct 209. The air outlet valve 202 is also connected to an air outlet duct.

[0037] In some embodiments, the testing section 3 includes: a placement table 301, installed within the test air duct 208, for placing the product to be tested; a sealing cover 302, provided with a transparent observation window 303, removably mounted at the top opening of the test air duct 208, with the transparent observation window 303 facing the placement table 301; and a data acquisition device 304, installed outside the circulating air duct 2. The test air duct 208 has a wire hole 211, through which a wire is passed through the wire hole 211 in the test air duct 208 to electrically connect to the product to be tested on the placement table 301. The test air duct 208 is used to connect to the third air duct 206, the placement table 301 is used to place the product to be tested, the sealing cover 302 is used to seal the opening of the test air duct 208, and the data acquisition device 304 is used to collect data during product testing.

[0038] During implementation, a placement table 301 is installed in the test air duct 208, and a sealing cover 302 is installed at the opening of the test air duct 208. Before the test, the sealing cover 302 of the test air duct 208 is opened, the product is placed on the placement table 301, and the data acquisition device 304 is connected to the product through a wire through the wire hole 211 on the test air duct 208. The sealing cover 302 is closed and the fan 1 and the heating module are turned on. At the same time, the circulating air valve 203 is opened and the air outlet valve 202 and the air inlet valve 201 are closed. The air circulates in the circulating air duct 2, and the heating module heats the passing air. The heated air passes through the third air duct 206 and the test air duct 208. After a period of time, the ambient temperature in the circulating air duct 2 reaches the predetermined temperature and the test is started. The data acquisition device 304 collects the data during the test, thereby completing the test. During the test, the condition of the product inside the test air duct 208 can be observed through the transparent observation window 303 on the sealing cover 302.

[0039] Specifically, a surrounding step is provided at the opening of the test air duct 208, and the sealing cover 302 is fitted on the step. The sealing cover 302 is provided with two handles, and the sealing cover 302 can be lifted by the handles. A plurality of support columns are provided on the bottom surface of the inside of the test air duct 208, and screw holes are provided on the support columns. The placement table 301 is fixed on the support columns by screws. A plurality of through holes are provided on the placement table 301. The purpose of providing the through holes is to enable the bottom of the product to directly contact the heated gas. A protective coil is provided at the wire hole 211, and the wire passes through the protective coil. The protective coil protects the wire and closes the wire hole 211 to prevent air from flowing out of the wire hole 211.

[0040] In some embodiments, a temperature sensor 216 , a smoke alarm 212 , and a flow equalizing plate 213 are installed in the test air duct 208 .

[0041] During implementation, a temperature sensor 216, a smoke alarm 212 and a flow equalizer 213 are installed in the test air duct 208. The temperature sensor 216 is used to monitor the ambient temperature in the test air duct 208 in real time during the test. Once the product in the test air duct 208 catches fire, the smoke alarm 212 can quickly sense it and issue a warning to remind the operator to deal with it in time to ensure the safety of the test environment. The flow equalizer 213 is used to make the air flowing through the test air duct 208 more evenly pass through, maintaining the stability of the air circulation in the test air duct 208.

[0042] In some embodiments, a through hole is provided on a side of the test air duct 208 , and an anemometer 214 is installed in the through hole.

[0043] During implementation, an anemometer 214 is installed at the side through hole of the test air duct 208 , and after the fan 1 is turned on, the air duct 2 is circulated to circulate air, and the anemometer 214 can detect the wind speed passing through the test air duct 208 .

[0044] Specifically, the air-cooled power module derating test equipment includes a PLC control system. The wind speed meter 214 transmits data to the PLC control system. The PLC control system controls the fan 1 to adjust the speed according to the set wind speed and the received wind speed data, so that the wind speed reaches a predetermined value.

[0045] In some embodiments, the outer surface of the circulating air duct 2 is covered with thermal insulation cotton (not shown in the figure).

[0046] During implementation, the outer surface of the circulating air duct 2 is covered with thermal insulation cotton, which can lower the outer surface temperature of the air duct and reduce heat loss.

[0047] In some embodiments, the heating unit includes a heating tube 215 , and the heating tube 215 is fixed in the second air duct 205 .

[0048] During implementation, the heating tube 215 is installed in the second air duct 205, the fan 1 is turned on to open the circulating air valve 203, and the heating tube 215 is turned on. The fan 1 blows air through the second air duct 205, and the heating tube 215 heats the air blowing through the second air duct 205.

[0049] Specifically, the air inlet of the second air duct 205 is set on one side of the bottom, and the heating tube 215 is set on the side of the second air duct 205. The heating tube 215 is located above the other side of the bottom of the second air duct 205. When the air enters the second air duct 205 from the air inlet, it will not pass through the heating tube 215, thereby avoiding the air at the air inlet from passing through the heating tube 215, which can increase the cooling speed.

[0050] In some cases, the heating tube 215 may also be a heating structure such as a heating wire.

[0051] In some embodiments, a chassis 4 is included, and the fan 1 and the circulating air duct 2 are fixed on the chassis 4 .

[0052] During implementation, the fan 1 and the circulating air duct 2 are installed on the chassis 4 , and the chassis 4 plays a role in supporting and protecting the circulating air duct 2 and the fan 1 .

[0053] Specifically, the fan 1 and the circulating air duct 2 are installed inside the chassis 4. A support base is provided on the side of the inside of the chassis 4. The fan 1 is fixed on the support base. The circulating air duct 2 is formed by docking the first air duct 204, the second air duct 205, and several third air ducts 206. A plurality of brackets are provided in the chassis 4. The first air duct 204, the second air duct 205, and the third air duct 206 are supported in the chassis 4 by the brackets. Support feet and universal wheels are provided at the bottom of the chassis 4, so that the chassis 4 can be stabilized on the ground and can also be transferred to other positions through the universal wheels.

[0054] In some embodiments, the chassis 4 is provided with a carrier 401, and the carrier 401 is provided with a plurality of spaced partitions 402. The partitions 402 are used to carry the test instruments.

[0055] During implementation, a carrier 401 is installed on the chassis 4 , partitions 402 are installed on the carrier 401 at intervals, and a test instrument is placed on the partitions 402 .

[0056] In some embodiments, the chassis 4 is provided with exhaust holes 403 on two sides, and an exhaust fan 404 is provided at the exhaust hole 403 on one side.

[0057] During implementation, an exhaust hole 403 is opened on the side of the chassis 4, and an exhaust fan 404 is set on the side corresponding to the exhaust hole 403 inside the chassis. The exhaust holes 403 and the exhaust fan 404 on both sides ensure the air circulation in the chassis.

[0058] The above is a specific description of the preferred implementation of the present invention, but the invention of the present invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A derating test device for air-cooled power modules, characterized in that: include: A fan having an air inlet end and an air outlet end; The circulating air duct is connected to the air outlet at the front end and the air inlet at the rear end. According to the flow direction of air in the circulating air duct, an air outlet, an air inlet, a heating part and a testing part are sequentially provided on the circulating air duct. The air inlet is provided with an air inlet valve, and the air outlet is provided with an air outlet valve. A circulating air valve is provided in the circulating air duct between the air outlet and the air inlet.

2. The air-cooled power module derating test equipment according to claim 1, characterized in that: The circulating air duct includes a first air duct, a second air duct, a third air duct, a fourth air duct, a test air duct, a fifth air duct, and a sixth air duct that are connected in sequence. The air outlet is opened on the first air duct, and the air inlet is opened on the second air duct. The first air duct and the second air duct are connected through a circulating air valve.

3. The air-cooled power module derating test equipment according to claim 1, characterized in that: The testing unit includes: The placement table is installed in the test air duct and is used to place the product to be tested; A sealing cover is provided with a transparent observation window, the test air duct is provided with an opening, and is detachably mounted at the top opening of the test air duct, with the transparent observation window facing the placement table; The data acquisition device is installed outside the circulating air duct. The test air duct is provided with a wire hole. The data acquisition device and the product are electrically connected to the product to be tested on the placement table through a wire passing through the wire hole on the test air duct.

4. The air-cooled power module derating test equipment according to claim 2, characterized in that: The test air duct is provided with a temperature sensor, a smoke alarm and a flow equalizing plate.

5. The air-cooled power module derating test equipment according to claim 1, characterized in that: A through hole is provided on the side of the test air duct, and a wind speed anemometer is installed in the through hole.

6. The air-cooled power module derating test equipment according to claim 1, characterized in that: The outer surface of the circulating air duct is covered with thermal insulation cotton.

7. The air-cooled power module derating test equipment according to claim 1, characterized in that: The heating part includes a heating pipe, and the heating pipe is fixed in the second air duct.

8. The air-cooled power module derating test equipment according to claim 1, characterized in that: The utility model comprises a chassis, and the fan and the circulating air duct are fixed on the chassis.

9. The air-cooled power module derating test equipment according to claim 8, characterized in that: A carrier is provided on the chassis, and a plurality of spaced-apart partitions are provided on the carrier.

10. The air-cooled power module derating test equipment according to claim 8, characterized in that: The chassis is provided with exhaust holes on both sides, and an exhaust fan is provided at the exhaust hole on one side.

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