CN205092460U - Refrigeration air supply and air volume adjusting device of semiconductor refrigeration cooling dust -protection type switch board - Google Patents

Abstract

The cooling air supply and air volume adjustment device of the semiconductor refrigeration cooling and dustproof power distribution cabinet, including the cooling air supply mechanism. The cooling surface of the semiconductor cooling fin is connected with the inner cooling fin located in the housing, the heating surface of the semiconductor cooling fin is connected with the outer cooling fin protruding from the housing, and the outer cooling fan is provided outside the housing to dissipate heat from the outer cooling fin, and one side of the housing is connected to the outer cooling fin. The air outlet of the turbo blower is connected, the other side of the housing is connected with a wind guide cover, the outlet of the wind guide cover is connected with a flexible hose, and the flexible hose is provided with a clamp-type wind speed adjustment mechanism. The utility model has the advantages of simple structure, easy operation, good heat dissipation effect, low energy consumption, strong reliability, and good dustproof effect. The utility model can maintain the temperature of the electrical components in a good working state through multiple adjustments of the air supply volume, thereby prolonging the Service life of electrical components.

Description

Refrigeration air supply and air volume adjustment device for semiconductor refrigeration cooling and dustproof power distribution cabinet

technical field

The utility model relates to an electrical device, in particular to a refrigeration air supply and air volume adjustment device for a semiconductor refrigeration cooling and dustproof power distribution cabinet.

Background technique

The power distribution cabinet is the final equipment of the power distribution system, and it is the general name of the motor control center. The heat generated by the electrical components installed in the power distribution cabinet needs to be discharged continuously to ensure the normal operation of the electrical components. At present, the heat dissipation method and structure of the electrical components in the power distribution cabinet have the following defects: 1. Since the power distribution cabinets are generally high in height, vertical ventilation is adopted, the air path is long, and the cold air at the end of the air path has been blocked. Heating, so the temperature in the power distribution cabinet is still high, and the heat dissipation effect is poor, resulting in shortened service life of electrical components; 2. There is more dust at the air inlet of the air duct, so that the wind entering the power distribution cabinet carries more dust; 3. 1. After the electrical components are used for a long time, dust is easy to accumulate in the depressions and irregular protrusions of the electrical components, which reduces the service life of the electrical components and forms a safety hazard (possibly causing a short circuit); 4. The air volume of the air circuit is not adjusted. Mechanism, large energy consumption, low cooling efficiency.

Utility model content

In order to solve the deficiencies in the prior art, the utility model provides a semi-conductor cooling and dust-proof cooling device with good cooling effect, adjustable cooling air volume, less dust carried in the cooling air, low energy consumption, and high cooling and heat dissipation efficiency. Cooling air supply and air volume adjustment device for electric cabinets.

In order to solve the above technical problems, the utility model adopts the following technical scheme: the cooling air supply and air volume adjustment device of the semiconductor refrigeration cooling and dustproof power distribution cabinet includes a cooling air supply mechanism, and the cooling air supply mechanism includes a turbo fan, a casing and a semiconductor The refrigerating sheet, the semiconductor refrigerating sheet is arranged in the housing, the cooling surface of the semiconductor refrigerating sheet is connected with the inner cooling fin located in the casing, the heating surface of the semiconductor refrigerating sheet is connected with the outer cooling fin protruding from the casing, and the outer casing is provided with an external cooling fin. A heat dissipation fan for cooling fins, one side of the casing is connected to the air outlet of the turbo fan, the other side of the casing is connected to a wind guide cover, the outlet of the wind guide cover is connected to a flexible hose, and the flexible hose is provided with Clamp type wind speed adjustment mechanism;

The clamp-type wind speed adjustment mechanism includes a fixed plate arranged vertically. One side of the fixed plate is provided with an adjusting motor and a square tube arranged vertically. The power output end of the adjusting motor is connected to a gear. There is a box outside, the square tube is slidingly connected with a rack, the side of the square tube is provided with a gap communicating with the inside of the square tube, one side of the gear extends into the gap and meshes with the rack, and the upper end of the rack is connected axially There is a push-pull rod, the upper end of the push-pull rod is connected with a sliding frame, the upper part of the fixed plate is hinged with the rear splint and the front splint, the rear guide rail is provided on the front side of the lower end of the rear splint, the front guide rail is provided on the rear side of the lower end of the front splint, and the rear guide rail and the lower end of the front guide rail are provided. The distance between the rear guide rail and the upper end of the front guide rail is greater than the distance between the upper ends of the rear guide rail and the front guide rail. The rear guide rail and the front guide rail are symmetrical and have the same structure with respect to the vertical front and back. The rear side of the carriage is provided with two rear sliders that slide along the rear guide rail. The front side of the carriage There are two front sliders that slide along the front guide rail. The middle part of the front surface of the rear guide rail is provided with a guide bar along the length direction. Shaped rear clamping ring, the top of the front splint is hinged with a semicircular front clamping ring, the openings of the front clamping ring and the rear clamping ring are set opposite to each other, the flexible hose is clamped between the rear clamping ring and the front clamping ring, and the rear splint It is connected with the front splint by an extension spring, and the extension spring is located on the lower side of the hinge point between the rear splint and the fixed plate.

Adopting the above-mentioned technical solution, the semiconductor refrigeration cooling and dust-proof power distribution cabinet also includes the following technical features: it includes a cabinet in the shape of a cuboid, and the cabinet is composed of a left side panel, a right side panel, a top panel, a bottom panel, a rear side panel and a cabinet door , there is a horizontal partition between the left side board and the right side board, there are louvers respectively on the left side board and the right side board, there is a left vertical board and a right vertical board between the top board and the bottom board, and the left vertical board and the left side The boards are parallel and adjacent, the right vertical board is parallel and adjacent to the right vertical board, the left vertical board and the right vertical board are evenly provided with ventilation holes, and the right side of the left vertical board and the left side of the right vertical board are respectively provided with electrical components; the top board There is an air volume rotation adjustment mechanism between the center and the center of the bottom plate;

The air volume rotation adjustment mechanism includes an outer sleeve, an inner sleeve and a servo motor. The upper and lower ends of the outer sleeve are fixedly connected to the top plate and the bottom plate respectively. The inner sleeve is coaxially arranged in the outer sleeve, and the servo motor is located in the outer sleeve and fixed on the bottom plate The main shaft of the servo motor is coaxially connected with a mounting column through a coupling. The inner diameter of the mounting column is equal to the inner diameter of the inner sleeve. The lower end of the inner sleeve is inserted into the mounting column and contacts the coupling. The space is fixed and connected by mounting screws along the horizontal radial direction; the outer casing is uniformly provided with outer arc holes, and the inner casing is evenly provided with inner arc holes, both of which are horizontally arranged and aligned One correspondence; there is a gap between the inner wall of the outer casing and the outer wall of the inner casing, the inner wall of the outer casing is provided with a positioning ring and a sliding sleeve located on the upper side of the positioning ring, the outer wall of the sliding sleeve is tightly matched with the inner wall of the outer casing, and the inner wall of the sliding sleeve and the inner Casing outer wall clearance fit;

The cooling air supply mechanism is set on the top plate, and there is also a mounting frame on the top of the top plate; a straight pipe joint is detachably connected to the mounting frame, and the straight pipe joint is arranged vertically. The upper end of the casing passes through the top plate and extends coaxially into the straight pipe joint, and a rotating sealing structure is provided between the straight pipe joint and the inner casing; the top plate is provided with a sealing ring for sealing the outer wall of the inner casing;

The rotary sealing structure includes an upper limit ring on the outside of the upper end of the inner sleeve and a lower limit ring on the lower end of the straight pipe joint. The lower limit ring is detachably connected to the straight pipe joint through fastening screws. The upper limit ring and the lower limit ring There is a sealing sleeve made of polyurethane material between them, and the sealing sleeve is respectively slid and sealed with the outer wall of the inner casing and the inner wall of the straight pipe joint;

The outer surface of the left side panel and the outer surface of the right side panel are respectively provided with a left dust suction device and a right dust suction device at the louvers. The left dust suction device and the right dust suction device have the same structure and are left and right symmetrical; The right large suction hood, the right end of the suction hood is fixed on the left side plate, the left end of the suction hood is connected with an exhaust fan, and a one-way ventilation valve is arranged on the suction hood;

There is a rotary dust blowing mechanism on the top of the electrical components. The rotary dust blowing mechanism includes a rotary motor, a miniature air compressor and a nozzle. The outlet of the air compressor is connected to the inlet of the nozzle through a high-pressure pipe, and the air jet of the nozzle is slanted downward toward the upper surface of the electrical component;

The air inlet of the turbo fan is hinged with an installation frame, the installation frame is provided with a filter screen corresponding to the air inlet of the turbo fan, and the installation frame is provided with a sealing gasket that is sealingly matched with the edge of the air inlet of the turbo fan. On the opposite side of the hinge, the frame is provided with a plastic buckle snap-fitted with the turbo blower.

The inner wall of the inner casing is provided with at least two reinforcing ribs along the axial direction. The heat dissipation principle of the semiconductor refrigeration cooling and dustproof power distribution cabinet is as follows: turn on the turbo fan, the dust or dust carried in the cold air will be pre-filtered by the filter, and the cold air generated by the cooling surface of the semiconductor cooling chip will diffuse through the inner heat sink, and the turbo fan will The cold air enters around the electrical components through the wind guide cover, flexible hose, elbow joint, inner sleeve, inner arc hole, and outer arc hole to cool and dissipate the electrical components. The heat emitted by the electrical components flows through the Vent holes and shutters are discharged into the suction hood, and then discharged through the one-way ventilation valve on the suction hood.

The refrigeration principle of the refrigeration air supply mechanism is as follows: After the semiconductor refrigeration sheet is powered on, the cold air generated by the cooling surface of the semiconductor refrigeration sheet diffuses through the inner heat sink, and the heat generated by the heating surface of the semiconductor refrigeration sheet is dissipated by the outer heat sink and passed through The blowing of the cooling fan greatly enhances the cooling effect.

The specific structural features of the semiconductor refrigeration cooling and dustproof power distribution cabinet have the following beneficial effects:

1. The setting of the filter screen can filter the outside air once, and the clean air enters the cooling air supply mechanism to be cooled. The plastic buckle is used to fix or open the installation frame to replace the filter.

2. A temperature sensor for monitoring the temperature inside the cabinet is also installed in the cabinet. When the temperature inside the cabinet is low or high, the servo motor can be started and/or the motor can be adjusted to adjust the exhaust air volume; when the servo motor is started, the drive inside When the sleeve rotates, since the length of the inner sleeve is equivalent to the height of the cabinet body, the reinforcing ribs set on the inner wall of the inner sleeve can enhance the torque of the inner sleeve, and the rotation of the inner sleeve can adjust the distance between the inner arc hole and the outer arc hole. The size of the coincidence, thereby adjusting the size of the exhaust air volume; when the adjustment motor is started, the rear clamp ring and the front clamp ring will clamp the flexible hose, and the exhaust air volume can be adjusted through the distance between the rear clamp ring and the front clamp ring. The specific adjustment process is as follows: by manipulating and adjusting the motor, the motor drives the gear to rotate, the gear drives the rack meshed with it to move to the right or left along the square tube, and the push-pull rod coaxial with the rack pushes or pulls the sliding frame upwards or downwards. Moving down, under the action of the tension spring, the rear slider on the rear splint and the front slider on the front splint always slide along the rear guide rail and the front guide rail respectively. When the push-pull rod is pushed upward, the sliding frame moves upward, and the rear guide rail and The distance between the front guide rails increases, and under the action of the lever principle, the rear clamp ring on the upper end of the rear splint and the front clamp ring on the upper end of the front splint clamp the flexible hose, the cross-sectional area of the flexible hose becomes smaller, and the ventilation volume decreases , in the same way, when the push-pull rod is pulled down, the cross-sectional area of the flexible hose becomes larger, and the exhaust air volume increases, so that the exhaust air volume in the cabinet can be adjusted, thereby achieving the effect of adjusting the good heat dissipation in the cabinet.

3. After the semi-conductor refrigeration cooling and dust-proof power distribution cabinet runs for a period of time, a layer of dust will adhere to the upper surface of the electrical components, start the rotating motor and the miniature air compressor, and the rotating motor will drive the transmission shaft, the miniature air compressor and the nozzle to rotate 360° , the high-pressure airflow generated by the miniature air compressor is ejected from the nozzle, and the dust on the surface of the electrical components is blown; at the same time, the exhaust fan is started, and the exhaust fan sucks the dust lifted up on the electrical components through the air holes and the louvers; one-way ventilation The valve has the effect of ventilating outside but not taking in air inwardly.

4. The sealing sleeve made of polyurethane in the rotating sealing structure not only has a good sealing effect, but also is smooth and has good wear resistance; the upper limit ring and the lower limit ring are used to limit the position of the sealing sleeve. When the sealing sleeve needs to be replaced, it can be Unscrew the fastening screw, take off the lower limit ring to take out the sealing sleeve and install a new sealing sleeve.

5. The lower end of the inner casing is inserted into the mounting column and is in contact with the coupling. The inner casing and the mounting column are fixedly connected by mounting screws along the horizontal radial direction, which not only supports the gravity of the inner casing itself, but also It can provide transmission torque for the inner casing.

6. The sliding sleeve plays the role of limiting the inner casing from tilting, and can be replaced when worn out. The positioning ring is used to limit the sliding sleeve from moving downward.

To sum up, semiconductor refrigeration cooling and dust-proof power distribution cabinet has simple structure, easy operation, good heat dissipation effect, low energy consumption, strong reliability, and good dust-proof effect. The temperature at which electrical components are maintained in good working order prolongs the life of electrical components.

Description of drawings

Figure 1 is a schematic structural diagram of a semiconductor refrigeration cooling and dustproof power distribution cabinet;

Fig. 2 is an enlarged view of the rotary sealing structure in Fig. 1;

Fig. 3 is an enlarged view of place A in Fig. 1;

Fig. 4 is the enlarged view of place B in Fig. 1;

Fig. 5 is an enlarged left view of the clamp-type wind speed regulating mechanism in Fig. 1;

Fig. 6 is a schematic structural view of the rear guide rail in Fig. 5;

Fig. 7 is a schematic structural view of the rear slider in Fig. 5;

Fig. 8 is a schematic structural diagram of the cooling air supply mechanism in Fig. 1 .

detailed description

As shown in Figures 1-8, the semiconductor refrigeration cooling and dust-proof power distribution cabinet includes a rectangular parallelepiped-shaped cabinet, which consists of a left side panel 1, a right side panel 2, a top panel 3, a bottom panel 4, and a rear side panel 5 It is composed of a cabinet door (not shown in the figure), a partition 6 is horizontally arranged between the left side panel 1 and the right side panel 2, shutters 7 are respectively arranged on the left side panel 1 and the right side panel 2, and the left side panel 1 The inner wall of the inner wall and the right side plate 2 is provided with a cleaning structure at the shutter 7, and a left vertical plate 8 and a right vertical plate 9 are arranged between the top plate 3 and the bottom plate 4, and the left vertical plate 8 is parallel and adjacent to the left side plate 1, The right vertical plate 9 is parallel to and adjacent to the right vertical plate 2, the left vertical plate 8 and the right vertical plate 9 are uniformly provided with ventilation holes 10, the right side of the left vertical plate 8 and the left side of the right vertical plate 9 are respectively provided with electrical components 11 .

An air volume rotation adjustment mechanism is provided between the center of the top plate 3 and the center of the bottom plate 4; the air volume rotation adjustment mechanism includes an outer sleeve 12, an inner sleeve 13 and a servo motor 14, and the upper and lower ends of the outer sleeve 12 are fixedly connected to the top plate 3 and the base plate 4 respectively. The inner casing 13 is coaxially arranged in the outer casing 12, the servo motor 14 is located in the outer casing 12 and fixed on the base plate 4, the main shaft of the servo motor 14 is coaxially connected with a mounting column 16 through a coupling 15, and the mounting column The inner diameter of 16 is equal to the inner diameter of the inner sleeve 13, the lower end of the inner sleeve 13 is inserted in the installation column 16 and contacts with the coupling 15, and the installation screw 17 along the horizontal radial direction is passed between the inner sleeve 13 and the installation column 16 Fixed connection; the outer casing 12 is uniformly provided with an outer arc-shaped hole 18, and the inner casing 13 is evenly provided with an inner arc-shaped hole 19, and the outer arc-shaped hole 18 and the inner arc-shaped hole 19 are all horizontally arranged and correspond to each other; There is a gap between the inner wall of the tube 12 and the outer wall of the inner sleeve 13, and the inner wall of the outer sleeve 12 is provided with a positioning ring 20 and a sliding sleeve 21 located on the upper side of the positioning ring 20, and the outer wall of the sliding sleeve 21 is tightly matched with the inner wall of the outer sleeve 12. The inner wall of the sleeve 21 is in clearance fit with the outer wall of the inner casing 13 .

The upper surface of the top plate 3 is provided with a refrigeration air supply mechanism 22 and a mounting frame 23. The refrigeration air supply mechanism includes a turbo fan 53, a housing 60 and a semiconductor refrigeration sheet 61. The semiconductor refrigeration sheet 61 is located in the housing 60, and the semiconductor refrigeration sheet 61 The cooling surface is connected with an inner cooling fin 62 located in the housing 60, and the heating surface of the semiconductor cooling fin 61 is connected with an outer cooling fin 63 protruding from the housing 60, and the outer cooling fin 63 is provided with a heat dissipation device for radiating heat outside the housing 60. Fan 64, one side of housing 60 is connected with the air outlet of turbo blower 53, the other side of housing 60 is connected with wind guide cover 65, and the outlet of wind guide cover 65 is connected with flexible hose 24, on flexible hose 24 A clamp-type wind speed adjustment mechanism 25 is provided, and a straight pipe joint 26 is detachably connected to the mounting frame 23. The straight pipe joint 26 is arranged vertically, and the upper end of the straight pipe joint 26 is connected to the flexible hose 24 through an elbow joint 27. The upper end passes through the top plate 3 and extends coaxially into the straight pipe joint 26, and a rotating sealing structure 28 is provided between the straight pipe joint 26 and the inner casing 13; the top plate 3 is provided with a sealing ring that is tightly matched with the outer wall of the inner casing 13 29.

The clamp-type wind speed regulating mechanism 25 includes a fixed plate 30 arranged vertically, and the surface of one side of the fixed plate 30 is provided with an adjusting motor 31 and a square tube 32 arranged in the vertical direction. 32 side parts are provided with box body 59 outside gear 33 and regulating motor 31, and rack 34 is slidably connected in square tube 32, and square tube 32 side parts are provided with the gap 35 that communicates with square tube 32 inside, and gear 33 side stretches out. into the gap 35 and engaged with the rack 34, the upper end of the rack 34 is coaxially connected with a push-pull rod 36, the upper end of the push-pull rod 36 is connected with a sliding frame 37, the upper part of the fixed plate 30 is hinged with a rear splint 38 and a front splint 39, Rear clamping plate 38 lower end front sides are provided with rear guide rail 40, and front clamping plate 39 lower end rear sides are provided with front guide rail 41, and the distance between rear guide rail 40 and front guide rail 41 lower ends is greater than the distance between rear guide rail 40 and front guide rail 41 upper ends, The rear guide rail 40 and the front guide rail 41 are symmetrical and have the same structure about the vertical front and back. The front slider 43, the middle part of the front surface of the rear guide rail 40 is provided with a guide bar 44 along the length direction, and the middle part of the rear side of the rear slider 42 is provided with a guide groove 45 slidingly matched with the guide bar 44; The rear clamp ring 46, the upper end of the front clamp plate 39 is hinged with a semicircular front clamp ring 47, the openings of the front clamp ring 47 and the rear clamp ring 46 are oppositely arranged front and back, and the flexible hose 24 is clamped between the rear clamp ring 46 and the front clamp ring. Between the rings 47, the rear splint 38 and the front splint 39 are connected by an extension spring 48, and the extension spring 48 is located at the lower side of the hinge point between the rear splint 38 and the fixed plate 30.

The rotary sealing structure 28 includes an upper limit ring 50 arranged outside the upper end of the inner sleeve 13 and a lower limit ring 49 arranged on the lower end surface of the straight pipe joint 26, and the lower limit ring 49 is detachably connected to the straight pipe joint 26 by fastening screws 51 , Between the upper limit ring 50 and the lower limit ring 49, there is a sealing sleeve 52 made of polyurethane material, and the sealing sleeve 52 is respectively in sliding sealing cooperation with the outer wall of the inner sleeve 13 and the inner wall of the straight pipe joint 26.

The outer surface of the left side plate 1 and the outer surface of the right side plate 2 are respectively provided with a left dust suction device and a right dust suction device at the shutter 7, and the left dust suction device and the right dust suction device have the same structure and are bilaterally symmetrical; the left dust suction device Including a suction hood 74 with a small left and a large right, the right end of the suction hood 74 is fixed on the left side plate 1, the left end of the suction hood 74 is connected with an exhaust fan 75, and the suction hood 74 is provided with a one-way ventilation valve 76;

The top of the electrical component 11 is provided with a rotary dust blowing mechanism, the rotary dust blowing mechanism includes a rotary motor 54, a miniature air compressor 55 and a nozzle 57, the rotary motor 54 is located on the electrical component 11, and the main shaft of the rotary motor 54 passes through the rotating shaft 56 and The micro-air compressor 55 is connected, and the outlet of the micro-air compressor 55 is connected with the inlet of the nozzle 57 through a high-pressure pipe, and the air jet of the nozzle 57 is obliquely downward toward the upper surface of the electrical component 11 . The inner wall of the inner sleeve 13 is provided with at least two reinforcing ribs 58 along the axial direction.

The air inlet place of turbo blower 53 is hinged with mounting frame 67 by hinge 66, and mounting frame 67 is provided with the filter screen 68 corresponding with the air inlet of turbo blower 53, and mounting frame 67 is provided with the edge of the air inlet of turbo blower 53. A sealing gasket for sealing fit at the position, and a plastic buckle 69 snap-fitted with the turbo blower 53 is provided on the opposite side of the hinge 66 on the installation frame 67 .

The heat dissipation principle of the semiconductor refrigeration cooling and dustproof power distribution cabinet is as follows: turn on the turbo fan 53, the dust or dust carried in the cold wind is pre-filtered by the filter 68, and the cold air generated by the cooling surface of the semiconductor refrigeration sheet 61 is diffused through the inner heat sink 62 , the turbo blower 53 enters around the electrical component 11 after the cold air passes through the wind guide cover 65, the flexible hose 24, the elbow joint 27, the inner casing 13, the inner arc hole 19, and the outer arc hole 18, and the electrical element 11 To cool and dissipate heat, the heat emitted by the electrical components 11 is discharged into the air suction hood 74 through the ventilation holes 10 and the shutters 7 along with the air flow, and then discharged through the one-way ventilation valve 76 on the air suction hood 74 .

A temperature sensor for monitoring the temperature in the cabinet is also installed in the cabinet. When the temperature in the cabinet is lower or higher, the servo motor 14 and/or the regulating motor 31 can be started to adjust the exhaust air volume; The inner sleeve 13 rotates, because the length of the inner sleeve 13 is equivalent to the height of the cabinet body, the reinforcing ribs provided on the inner wall of the inner sleeve 13 can enhance the torque of the inner sleeve 13, the inner sleeve 13 rotates, and the inner arc hole 19 can be adjusted The size that overlaps with the outer arc-shaped hole 18, thereby adjusting the size of the exhaust air; when the adjustment motor 31 is started, the rear clamp ring 46 and the front clamp ring 47 clamp the flexible hose 24, and pass through the rear clamp ring 46 and the front clamp The distance between the rings 47 is adjusted for the draft volume. The specific adjustment process is as follows: by controlling the adjustment motor 31, the adjustment motor 31 drives the gear 33 to rotate, the gear 33 drives the rack 34 meshed with it to move to the right or left along the square tube 32, and the push-pull rod 36 coaxial with the rack 34 Push or pull the sliding frame 37 to move up or down, under the effect of the extension spring 48, the rear slider 42 on the rear clamping plate 38 and the front slider 43 on the front clamping plate 39 are always along the rear guide rail 40 and the front guide rail 41 respectively. Sliding, when the push-pull rod 36 was pushed upwards, the sliding frame 37 moved upwards, and the distance between the rear guide rail 40 and the front guide rail 41 increased. The front clamping ring 47 clamps the flexible hose 24 tightly, the cross-sectional area of the flexible hose 24 becomes smaller, and the exhaust air volume decreases. Large, so that you can adjust the amount of exhaust air in the cabinet, so as to achieve the effect of adjusting the good heat dissipation in the cabinet.

After the semi-conductor refrigeration cooling and dust-proof power distribution cabinet runs for a period of time, a layer of dust will adhere to the upper surface of the electrical component 11, and the rotating motor 54 and the miniature air compressor 55 will be started, and the rotating motor 54 will drive the drive shaft 56, the miniature air compressor 55 and The nozzle 57 rotates 360°, the high-pressure airflow produced by the miniature air compressor 55 is ejected from the nozzle 57, and the dust on the surface of the electrical components is blown up; It is drawn out through the vent hole 10 and the louver 7; the one-way vent valve 76 has the effect of ventilating outward and not inwardly airing.

The above embodiments are only used to illustrate and not limit the technical solutions of the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that the present utility model can still be modified or equivalently replaced. Any modification or partial replacement without departing from the spirit and scope of the present utility model shall fall within the scope of the claims of the present utility model.

Claims (1)

1. the refrigeration of semiconductor refrigerating cooling, dust preventing type power distribution cabinet is blown and volume adjusting apparatus, it is characterized in that: comprise refrigeration wind pushing mechanism, refrigeration wind pushing mechanism comprises turbofan, housing and semiconductor chilling plate, semiconductor chilling plate is located in housing, the chill surface of semiconductor chilling plate is connected with the fin being positioned at housing, the face that heats of semiconductor chilling plate is connected with the outer fin stretching out housing, the radiator fan that external fin carries out dispelling the heat is provided with outside housing, the side of housing is connected with the air outlet of turbofan, the opposite side of housing is connected with wind scooper, the outlet of wind scooper is connected with flexible hose, flexible hose is provided with jaw type wind speed governor motion,

Jaw type wind speed governor motion comprises vertically disposed fixed head, fixed head one side surface is provided with the square tube regulating motor and vertically arrange, the clutch end of motor is regulated to be connected with gear, square tube sidepiece is provided with casing outside gear and adjustment motor, tooth bar is slidably connected in square tube, square tube sidepiece is provided with the breach be communicated with square tube inside, gear side to extend in breach and is connected with a joggle with tooth bar, tooth bar upper end is coaxial is connected with pull bar, pull bar upper end is connected with travelling carriage, fixed head upper articulation has rear plate and front plate, rear plate is provided with rear rail on front side of lower end, front plate is provided with fromer rail on rear side of lower end, distance between rear rail and fromer rail lower end is greater than the distance between rear rail and fromer rail upper end, rear rail and fromer rail are about symmetry before and after vertical plane and structure is identical, two rear sliders slided along rear rail are provided with on rear side of travelling carriage, two front-sliders slided along fromer rail are provided with on front side of travelling carriage, gib block is provided with along its length in the middle part of rear rail front surface, the gathering sill be slidably matched with gib block is provided with in the middle of on rear side of rear slider, rear plate upper end thereof has semicircular rear clamp ring, front plate upper end thereof has semicircular front clamp ring, be oppositely arranged before and after the opening of front clamp ring and rear clamp ring, flexible hose is clamped between rear clamp ring and front clamp ring, connected by extension spring between rear plate and front plate, extension spring is positioned at the downside of rear plate and fixed head pin joint.