CN218496855U

CN218496855U - Electric automobile flame retardant property experiment machine

Info

Publication number: CN218496855U
Application number: CN202222948202.1U
Authority: CN
Inventors: 郭金武; 李政国
Original assignee: Shandong Jujinlong Automobile Development Co ltd
Current assignee: Shandong Jujinlong Automobile Development Co ltd
Priority date: 2022-11-04
Filing date: 2022-11-04
Publication date: 2023-02-17
Anticipated expiration: 2032-11-04

Abstract

The utility model relates to the technical field of flame retardant experiments, in particular to an electric automobile flame retardant performance experiment machine which can automatically clean solid impurities attached to the lower end of a filter screen, is convenient to use and has high practicability; the flame burner device comprises a bottom plate, a bracket and a flame burner, wherein the bracket is fixedly arranged at the upper end of the bottom plate; still including a frame, the cartridge filter, the filter screen, motor A, the apparatus further comprises a rotating shaft, the connecting plate, the gas-supply pipe, exhaust treatment device and getter device, a frame fixed mounting is in the bottom plate upper end, getter device installs on a frame, cartridge filter fixed mounting is at a frame right-hand member, the inside of cartridge filter is provided with the cavity, getter device is connected with the input of gas-supply pipe, the output of gas-supply pipe and the lower part intercommunication of cartridge filter cavity, filter screen fixed mounting is provided with the multiunit filtration pore on the filter screen in the cavity of cartridge filter.

Description

Electric automobile flame retardant property experiment machine

Technical Field

The utility model relates to a technical field of fire-retardant experiment especially relates to an electric automobile flame retardant property experiment machine.

Background

Along with the development of society and the improvement of living standard of people, people have higher and higher environmental protection consciousness. Compared with the traditional fuel oil automobile, the electric automobile generates less pollutants in the using process, so the electric automobile is more and more favored by people. In order to ensure the safety of the automobile in the using process, the materials used on the automobile need to be used after being detected by a flame retardant experiment.

In the prior art, the electric vehicle flame retardant performance experiment device with the patent application number of "CN201921232777.5" comprises a tester, wherein an opening is formed in the top end of the tester, the opening is communicated with an inner cavity of the tester, a clamping groove is formed in the opening, a rectangular frame is movably connected in the clamping groove, two clamping blocks are arranged at the bottom of the rectangular frame, a filter screen, an acid mist filtering device and a heavy metal filtering device are arranged in the rectangular frame, movable grooves are formed in the tops of the left side wall and the right side wall of the clamping groove, limiting blocks are movably connected in the movable grooves, and a suction fan is movably connected to the bottom end of the rectangular frame through fixing lugs; when the filter screen is used, solid impurities in harmful gas generated in the flame-retardant experiment process are filtered through the filter screen, and then harmful substances in the gas are absorbed through other absorption devices.

It is found in the use, though it can be automatically to the harmful gas who produces in the fire-retardant experiment handle, along with operating time's increase, the adnexed solid-state impurity also can come more on the filter screen, and above-mentioned device can't be handled adnexed solid-state impurity on the filter screen automatically, leads to its use inconvenient, and the practicality is poor.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a can clear up the adnexed solid-state impurity of filter screen lower extreme automatically, convenient to use, electric automobile fire behaviour experiment machine that the practicality is high.

The utility model discloses a flame retardant property tester for an electric automobile, which comprises a bottom plate, a bracket and a flame burner, wherein the bracket is fixedly arranged at the upper end of the bottom plate, and the flame burner is fixedly arranged on the bracket; the filter comprises a support frame, a filter cartridge, a filter screen, a motor A, a rotating shaft, a connecting plate, a gas pipe, a waste gas treatment device and a gas suction device, wherein the support frame is fixedly arranged at the upper end of a bottom plate, the gas suction device is arranged on the support frame, the filter cartridge is fixedly arranged at the right end of the support frame, a cavity is arranged inside the filter cartridge, the gas suction device is connected with the input end of the gas pipe, the output end of the gas pipe is communicated with the lower part of the cavity of the filter cartridge, the filter screen is fixedly arranged in the cavity of the filter cartridge, a plurality of groups of filter holes are formed in the filter screen, the waste gas treatment device is arranged on the bottom plate, the input end of the waste gas treatment device is communicated with the output end of the gas suction device, the motor A is fixedly arranged at the lower end of the filter cartridge, the rotating shaft is rotatably arranged on the filter cartridge, the lower end of the rotating shaft is connected with the output end of the motor A, the connecting plate is fixedly arranged at the upper end of the rotating shaft, a hairbrush is arranged at the upper part of the connecting plate, and the lower end surface of the filter screen is tightly attached to the hairbrush; when the flame-retardant test is carried out on a piece to be detected on the electric automobile, the accessory to be detected is placed at the upper end of the bracket, then the flame burner is started to burn the piece to be detected, and the flame-retardant property of the piece to be detected is detected; meanwhile, the air suction device is opened to reduce the pressure on the upper part of the cavity of the filter cylinder, then harmful gas generated in the flame-retardant experiment process enters the lower part of the cavity of the filter cylinder through the air suction device and the gas delivery pipe, then the harmful gas filters solid impurities through a plurality of groups of filter holes on the filter screen and enters the waste gas treatment device through the output end of the air suction device to treat waste gas, when the solid impurities attached to the lower end of the filter screen need to be cleaned, the motor A is started, the motor A drives the connecting plate to rotate through the rotating shaft, the connecting plate drives the hairbrush to rotate, and the hairbrush brushes brush can brush down the solid impurities attached to the lower end of the filter screen in the rotating process; it can clear up the adnexed solid-state impurity of filter screen lower extreme automatically, convenient to use, and the practicality is high.

Preferably, the air suction device comprises a moving device, a funnel, an output pipe, a hose, a vacuum pump and an air pipe A, the moving device is installed on the support frame, the funnel is installed on the moving device, the moving device is used for adjusting the height of the funnel, the output end of the funnel is connected with the input end of the hose through the output pipe, the output end of the hose is connected with the input end of the air pipe, the vacuum pump is fixedly installed on the filter cylinder, the output end of the vacuum pump is connected with the input end of the waste gas treatment device, and the input end of the vacuum pump is communicated with the upper part of the cavity of the filter cylinder through the air pipe A; when harmful gas generated in the flame-retardant experimental process is treated, firstly, a moving device is started, the moving device adjusts the height of a funnel until the funnel is adjusted to the height suitable for absorbing the harmful gas, then, a vacuum pump is started, the vacuum pump conveys the gas on the upper part of a filter cylinder cavity to an exhaust gas treatment device through a gas pipe A and the vacuum pump through the gas pipe A, so that the gas pressure on the upper part of the filter cylinder cavity is reduced, the waste gas generated in the flame-retardant experimental process sequentially enters the lower part of the filter cylinder cavity through the funnel, an output pipe, a hose and a gas pipe, the waste gas is filtered through a filter screen in the conveying process from the lower part to the upper part of the filter cylinder cavity, the filter screen filters out solid impurities in the waste gas, and the waste gas sequentially enters the exhaust gas treatment device through the gas pipe A and the vacuum pump for treatment; which facilitates the absorption of the exhaust gases.

Preferably, the moving device comprises a motor B, a screw rod, a sliding block and a lifting plate, the motor B is fixedly arranged at the upper end of the support frame, the screw rod is rotatably arranged on the support frame, the upper end of the screw rod is connected with the output end of the motor B, the sliding block is screwed with the screw rod, the sliding block is vertically and slidably arranged on the support frame, the lifting plate is fixedly arranged on the sliding block, and the funnel is fixedly arranged on the lifting plate; the motor B is started, the motor B drives the screw rod to rotate, the rotating screw rod enables the lifting plate to adjust the height through the sliding block, and the lifting plate adjusts the height of the funnel until the funnel is adjusted to the height suitable for absorbing harmful gas; the height of the funnel can be adjusted according to the size of the piece to be detected, so that the funnel is always positioned at a height suitable for absorbing harmful gas, and the funnel is convenient to use.

Preferably, the waste gas treatment device comprises an absorption box, a fixing frame, a joint, a discharge pipe and a jet pipe, wherein the absorption box is fixedly arranged at the upper end of the bottom plate, a cavity is formed in the absorption box, absorption liquid is arranged in the cavity of the absorption box, the fixing frame is fixedly arranged at the upper part of the absorption box, the joint is fixedly arranged at the upper end of the fixing frame, the output end of the joint is connected with the input end of the discharge pipe, the output end of the discharge pipe is connected with the input end of the jet pipe, a plurality of groups of discharge pipes are arranged at the output end of the jet pipe, the discharge pipe is arranged at the output end of the vacuum pump, and the output end of the discharge pipe is connected with the input end of the joint; the gas injection pipe is immersed below the liquid level of the absorption liquid, waste gas enters the gas injection pipe through the vacuum pump, the discharge pipe, the joint and the discharge pipe in sequence, then the waste gas is uniformly discharged into the absorption liquid through a plurality of groups of exhaust pipes on the gas injection pipe, the absorption liquid absorbs harmful gas in the waste gas, and then the treated gas is discharged through the absorption liquid in the cavity of the absorption box; it facilitates the absorption of harmful gas in the waste gas and has high environmental protection property.

Preferably, the device also comprises a water pump, a water delivery pipe, a spray pipe, a connecting frame and a liquid discharge pipe, wherein the water pump is fixedly arranged at the upper end of the filter cylinder; when solid impurities attached to the lower end of the filter screen need to be cleaned, a valve on the water conveying pipe is opened, an input water pipe on the water pump is connected with an external water source, then the water pump is opened, water in the external water source sequentially enters a plurality of groups of drain pipes through the water pump, the water conveying pipe and the spray pipes, then the water is uniformly sprayed to the upper end of the filter screen through the plurality of groups of drain pipes, then the water flows to the lower end of the filter screen through a plurality of groups of filter holes on the filter screen, the solid impurities attached to the filter screen are washed off in the process that the water flows downwards on the filter screen, then the water and the solid impurities fall to the lower part of a cavity of the filter cartridge together, and then a valve on the liquid discharge pipe is opened, so that the water and the solid impurities are discharged together through the liquid discharge pipe and then collected; it has made things convenient for the clearance to solid-state impurity on the filter screen more through washing to the filter screen.

Preferably, the filter cylinder is provided with an access hole, the access hole is communicated with the chamber of the filter cylinder, and a sealing cover is arranged outside the access hole; through the arrangement, the filter cylinder chamber equipment is convenient to overhaul and maintain, and convenience is improved.

Preferably, a waterproof cover is arranged on the motor A; through the arrangement, water falling to the motor A from the outside is reduced, and the safety of the motor A in the using process is improved.

Compared with the prior art, the beneficial effects of the utility model are that: can clear up the adnexed solid-state impurity of filter screen lower extreme automatically, convenient to use, the practicality is high.

Drawings

FIG. 1 is a schematic view of the axial measurement structure of the present invention;

FIG. 2 is a schematic structural view of a filter cartridge, a filter screen, a gas pipe and the like;

FIG. 3 is a schematic view of the structure of an absorption tank, a joint, a gas lance and the like;

FIG. 4 is a schematic structural diagram of a filter screen, a motor A, a rotating shaft and the like;

fig. 5 is a schematic front view of the present invention;

in the drawings, the reference numbers: 1. a base plate; 2. a support; 3. a flame burner; 4. supporting a frame; 5. a filter cartridge; 6. filtering with a screen; 7. a motor A; 8. a rotating shaft; 9. a connecting plate; 10. a gas delivery pipe; 11. a funnel; 12. an output pipe; 13. a hose; 14. a vacuum pump; 15. a trachea A; 17. a motor B; 18. a lead screw; 19. a slider; 20. a lifting plate; 21. an absorption tank; 22. a fixing frame; 23. a joint; 24. a discharge pipe; 25. a gas ejector tube; 26. a water pump; 27. a water delivery pipe; 28. a spray pipe; 29. a connecting frame; 30. and a liquid discharge pipe.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

As shown in fig. 1 to 5, the flame retardant performance testing machine for electric vehicles of the present invention comprises a bottom plate 1, a support 2, a flame burner 3, a support frame 4, a filter cartridge 5, a filter screen 6, a motor A7, a rotating shaft 8, a connecting plate 9, a gas pipe 10, a waste gas treatment device, a moving device, a funnel 11, an output pipe 12, a hose 13, a vacuum pump 14 and a gas pipe a15, wherein the support 2 is fixedly installed at the upper end of the bottom plate 1, the flame burner 3 is fixedly installed on the support 2, the support frame 4 is fixedly installed at the upper end of the bottom plate 1, the filter cartridge 5 is fixedly installed at the right end of the support frame 4, a chamber is arranged inside the filter cartridge 5, an air suction device is connected with the input end of the gas pipe 10, the output end of the gas pipe 10 is communicated with the lower part of the chamber of the filter cartridge 5, the filter screen 6 is fixedly installed in the chamber of the filter cartridge 5, a plurality of filter holes are arranged on the filter screen 6, exhaust treatment device installs on bottom plate 1, motor A7 fixed mounting is at cartridge filter 5 lower extreme, 8 rotations of pivot are installed on cartridge filter 5, the lower extreme of pivot 8 is connected with motor A7's output, 9 fixed mounting of connecting plate are in 8 upper ends of pivot, the upper portion of connecting plate 9 is provided with the brush, the brush is pasted tightly with the lower terminal surface of filter screen 6, mobile device installs on a frame 4, funnel 11 installs on mobile device, mobile device is used for adjusting the height of funnel 11, the output of funnel 11 passes through output tube 12 and is connected with the input of hose 13, the output of hose 13 is connected with the input of gas-

supply pipe

10, 14 fixed mounting of vacuum pump is on cartridge filter 5, the output of vacuum pump 14 is connected with exhaust treatment device's input, the input of vacuum pump 14 passes through trachea A15 and the upper portion intercommunication of 5 cavities of cartridge filter.

As shown in fig. 2, the water pump 26 is fixedly installed at the upper end of the filter cartridge 5, an input water pipe is arranged at an input end of the water pump 26, an output end of the water pump 26 is connected with an input end of the spray pipe 28 through a water pipe 27, a valve is arranged on the water pipe 27, the spray pipe 28 is fixedly installed in a cavity of the filter cartridge 5 through a connecting frame 29, a plurality of groups of drain pipes are arranged at the lower part of the spray pipe 28, a drain pipe 30 is fixedly installed at the lower part of the filter cartridge 5, and a valve is arranged on the drain pipe 30.

As shown in fig. 3, the exhaust gas treatment device includes an absorption box 21, a fixed frame 22, a joint 23, a discharge pipe 24 and an air injection pipe 25, the absorption box 21 is fixedly installed at the upper end of the bottom plate 1, a cavity is provided inside the absorption box 21, absorption liquid is provided in the cavity of the absorption box 21, the fixed frame 22 is fixedly installed at the upper part of the absorption box 21, the joint 23 is fixedly installed at the upper end of the fixed frame 22, the output end of the joint 23 is connected with the input end of the discharge pipe 24, the output end of the discharge pipe 24 is connected with the input end of the air injection pipe 25, the output end of the air injection pipe 25 is provided with a plurality of groups of discharge pipes, the output end of the vacuum pump 14 is provided with a discharge pipe, and the output end of the discharge pipe is connected with the input end of the joint 23.

As shown in fig. 5, the moving device includes a motor B17, a lead screw 18, a slider 19 and a lifting plate 20, the motor B17 is fixedly installed at the upper end of the supporting frame 4, the lead screw 18 is rotatably installed on the supporting frame 4, the upper end of the lead screw 18 is connected with the output end of the motor B17, the slider 19 is screwed with the lead screw 18, the slider 19 is slidably installed on the supporting frame 4 up and down, the lifting plate 20 is fixedly installed on the slider 19, and the funnel 11 is fixedly installed on the lifting plate 20.

The utility model discloses an electric automobile flame retardant property experiment machine, at work, at first close the valve on raceway 27 and fluid-discharge tube 30, place the accessory that needs to detect on support 2 upper end, then open flame burner 3, make flame burner 3 treat that the detection piece burns, detect its flame retardant property can; the mobile device is started, the mobile device adjusts the height of the funnel 11, the funnel 11 is adjusted to the height suitable for absorbing harmful gas, then the vacuum pump 14 is started, the vacuum pump 14 conveys gas on the upper part of the cavity of the filter cylinder 5 to the exhaust gas treatment device through the air pipe A15 and the vacuum pump 14 through the air pipe A15, the gas pressure on the upper part of the cavity of the filter cylinder 5 is reduced, waste gas generated in the flame-retardant experiment process enters the lower part of the cavity of the filter cylinder 5 through the funnel 11, the output pipe 12, the hose 13 and the air pipe 10 in sequence, then the waste gas is filtered through the filter screen 6 in the conveying process from the lower part to the upper part of the cavity of the filter cylinder 5, the filter screen 6 filters out solid impurities in the waste gas, and then the waste gas enters the exhaust gas treatment device through the air pipe A15 and the vacuum pump 14 in sequence to be treated.

When solid impurities attached to the lower end of the filter screen 6 need to be cleaned, the motor A7 is turned on, the motor A7 drives the connecting plate 9 to rotate through the rotating shaft 8, the connecting plate 9 drives the brush to rotate, the brush brushes the solid impurities attached to the lower end of the filter screen 6 downwards in the rotating process, meanwhile, the valve on the water delivery pipe 27 is turned on, then the water inlet pipe on the water pump 26 is connected with an external water source, then the water pump 26 is turned on, water in the external water source sequentially enters a plurality of groups of water drainage pipes through the water pump 26, the water delivery pipe 27 and the spraying pipe 28, then the water is uniformly sprayed to the upper end of the filter screen 6 through the plurality of groups of water drainage pipes, then the water flows to the lower end of the filter screen 6 through the plurality of groups of filter holes on the filter screen 6, the solid impurities attached to the filter screen 6 are washed off in the downward flowing process of the filter screen 6, then the water and the solid impurities fall to the lower part of the cavity of the filter cartridge 5 together, then the valve on the liquid discharge pipe 30 is turned on, and the liquid discharge pipe 30 is turned on, so that the water and the solid impurities are discharged together through the liquid discharge pipe 30 and then collected; the cleaning of solid impurities on the filter screen 6 is facilitated.

When the height of the funnel 11 needs to be adjusted, the motor B17 is started, the motor B17 drives the screw rod 18 to rotate, the rotating screw rod 18 enables the lifting plate 20 to adjust the height through the sliding block 19, and the lifting plate 20 adjusts the height of the funnel 11 until the funnel 11 is adjusted to the height suitable for absorbing harmful gas; the height of the funnel 11 can be adjusted according to the size of the piece to be detected, so that the funnel 11 is always positioned at a height suitable for absorbing harmful gas, and the use is facilitated.

The installation mode, the connection mode or the setting mode of the electric automobile flame retardant performance testing machine of the utility model are common mechanical modes, and the electric automobile flame retardant performance testing machine can be implemented as long as the beneficial effects can be achieved; the utility model discloses an electric automobile flame retardant property experiment machine's flame burner 3, filter screen 6, funnel 11, vacuum pump 14, joint 23, water pump 26 and spray line 28 for purchase on the market, technical staff only need according to its subsidiary operating specification install and operate can in this industry, and need not the technical staff in this field and pay out creative work.

All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In the description of the present invention, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. To those of ordinary skill in the art, the specific meaning of the above terms in the present invention is understood according to the specific circumstances.

The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. An electric automobile flame retardant performance tester comprises a bottom plate (1), a support (2) and a flame burner (3), wherein the support (2) is fixedly arranged at the upper end of the bottom plate (1), and the flame burner (3) is fixedly arranged on the support (2); the device is characterized by further comprising a support frame (4), a filter cylinder (5), a filter screen (6), a motor A (7), a rotating shaft (8), a connecting plate (9), a gas pipe (10), a waste gas treatment device and an air suction device, wherein the support frame (4) is fixedly arranged on a bottom plate (1), the air suction device is arranged on the support frame (4), the filter cylinder (5) is fixedly arranged at the right end of the support frame (4), a cavity is arranged inside the filter cylinder (5), the air suction device is connected with the input end of the gas pipe (10), the output end of the gas pipe (10) is communicated with the lower part of the cavity of the filter cylinder (5), the filter screen (6) is fixedly arranged in the cavity of the filter cylinder (5), a plurality of groups of filter holes are formed in the filter screen (6), the waste gas treatment device is arranged on the bottom plate (1), the input end of the waste gas treatment device is communicated with the output end of the air suction device, the motor A (7) is fixedly arranged at the lower end of the filter cylinder (5), the rotating shaft (8) is rotatably arranged on the filter screen (5), the connecting plate (9), and the lower end of a brush is tightly attached to the filter screen (6).

2. The electric automobile flame retardant performance tester of claim 1, characterized in that the air suction device comprises a moving device, a funnel (11), an output pipe (12), a hose (13), a vacuum pump (14) and an air pipe A (15), the moving device is installed on a support frame (4), the funnel (11) is installed on the moving device, the moving device is used for adjusting the height of the funnel (11), the output end of the funnel (11) is connected with the input end of the hose (13) through the output pipe (12), the output end of the hose (13) is connected with the input end of the air pipe (10), the vacuum pump (14) is fixedly installed on the filter cartridge (5), the output end of the vacuum pump (14) is connected with the input end of the exhaust gas treatment device, and the input end of the vacuum pump (14) is communicated with the upper part of the chamber of the filter cartridge (5) through the air pipe A (15).

3. The testing machine for testing the flame retardant property of electric vehicles according to claim 2, wherein the moving device comprises a motor B (17), a lead screw (18), a sliding block (19) and a lifting plate (20), the motor B (17) is fixedly installed at the upper end of the supporting frame (4), the lead screw (18) is rotatably installed on the supporting frame (4), the upper end of the lead screw (18) is connected with the output end of the motor B (17), the sliding block (19) is screwed with the lead screw (18), the sliding block (19) is vertically slidably installed on the supporting frame (4), the lifting plate (20) is fixedly installed on the sliding block (19), and the funnel (11) is fixedly installed on the lifting plate (20).

4. The electric automobile flame retardant performance tester according to claim 1, wherein the exhaust gas treatment device comprises an absorption box (21), a fixed frame (22), a joint (23), a discharge pipe (24) and an air injection pipe (25), the absorption box (21) is fixedly installed at the upper end of the bottom plate (1), a cavity is arranged inside the absorption box (21), absorption liquid is arranged in the cavity of the absorption box (21), the fixed frame (22) is fixedly installed at the upper part of the absorption box (21), the joint (23) is fixedly installed at the upper end of the fixed frame (22), the output end of the joint (23) is connected with the input end of the discharge pipe (24), the output end of the discharge pipe (24) is connected with the input end of the air injection pipe (25), the output end of the air injection pipe (25) is provided with a plurality of groups of exhaust pipes, the output end of the vacuum pump (14) is provided with the discharge pipe, and the output end of the discharge pipe is connected with the input end of the joint (23).

5. The electric automobile flame retardant performance testing machine according to claim 1, characterized by further comprising a water pump (26), a water pipe (27), a spray pipe (28), a connecting frame (29) and a drain pipe (30), wherein the water pump (26) is fixedly installed at the upper end of the filter cartridge (5), an input water pipe is arranged at an input end of the water pump (26), an output end of the water pump (26) is connected with an input end of the spray pipe (28) through the water pipe (27), a valve is arranged on the water pipe (27), the spray pipe (28) is fixedly installed in a cavity of the filter cartridge (5) through the connecting frame (29), a plurality of groups of drain pipes are arranged at the lower part of the spray pipe (28), the drain pipe (30) is fixedly installed at the lower part of the filter cartridge (5), and the drain pipe (30) is provided with a valve.

6. The electric automobile flame retardant performance tester as claimed in claim 1, wherein the filter cartridge (5) is provided with an access hole, the access hole is communicated with the chamber of the filter cartridge (5), and a sealing cover is arranged outside the access hole.

7. The testing machine for testing the flame retardant property of electric vehicles according to claim 1, characterized in that a waterproof cover is arranged on the motor A (7).