CN113489311B - DC-DC switching power supply - Google Patents

Abstract

The utility model relates to a DC-DC switch, it relates to switch's field, it includes the casing, be equipped with a plurality of components and parts in the casing, still include annular box of taking out air, be equipped with two relative louvres on the perisporium of casing, the outer rampart of annular box of taking out air is fixed at the inside wall of casing, the inner rampart of annular box of taking out air is towards a plurality of components and parts, the inner rampart of annular box of taking out air is equipped with a plurality of heat absorption holes, the outer rampart of annular box of taking out air is equipped with the heat extraction hole with a plurality of louvres one-to-one, the inside wall of casing is equipped with a plurality of heat dissipation chambeies, the heat extraction intracavity is equipped with the exhaust subassembly that is used for taking out the interior gas extraction of annular box of taking out air and sending into the louvre, the heat extraction intracavity is equipped with the automatic shutoff subassembly that is used for shutoff louvre. This application has the radiating effect of improvement to components and parts.

Description

DC-DC switching power supply

Technical Field

The present application relates to the field of switching power supplies, and in particular, to a DC-DC switching power supply.

Background

A switching power supply, which is a high-frequency power conversion device and a power supply. The function of the switching power supply is to convert a level voltage into a voltage or current required by the user terminal through different types of architectures. The switching power supply comprises a direct current switching power supply and an alternating current switching power supply.

At present, because switching power supply is after long-time work, its inside components and parts generate heat easily and lead to the inside temperature of switch casing to rise, if components and parts work easily and take place to damage under the high temperature for a long time, in order to reduce the temperature in the casing and avoid components and parts to take place to damage because of the high temperature as far as possible, in switching power supply's manufacturing, generally can set up a plurality of louvre on switching power supply's shell to realize the circulation between air and the outdoor air in the casing, with the temperature in the reduction casing.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: above-mentioned switching power supply is in the use, and the component radiating rate that just is close to louvre one side is fast to the inside casing through the radiating hole on the wall of casing both sides, but is slow to the component radiating rate at casing middle part, causes the component at casing middle part easily to influence switching power supply's normal work because of the high temperature, has reduced switching power supply's life.

Disclosure of Invention

In order to solve the problem that the heat dissipation speed of components in the middle of the shell is low through heat dissipation holes in two side walls of the shell, the application provides a DC-DC switching power supply.

The DC-DC switching power supply adopts the following technical scheme:

the utility model provides a DC-DC switching power supply, includes the casing, be equipped with a plurality of components and parts in the casing, still include annular box of bleeding, be equipped with two relative louvres on the perisporium of casing, the outer rampart of annular box of bleeding is fixed at the inside wall of casing, the inner rampart of annular box of bleeding is towards a plurality of components and parts, the inner rampart of annular box of bleeding is equipped with a plurality of heat absorption holes, the outer rampart of annular box of bleeding is equipped with the heat extraction hole with a plurality of louvres one-to-one, the inside wall of casing is equipped with a plurality of heat dissipation chambeies, the heat extraction intracavity is equipped with and is used for bleeding the interior gas extraction of annular box of bleeding and send into the downthehole exhaust subassembly of louvre into, the heat extraction intracavity is equipped with the automatic shutoff subassembly that is used for shutoff louvre.

Through adopting above-mentioned technical scheme, switching power supply is at the during operation, and the inside components and parts production of heat of casing, and then the gaseous intensification in the casing, and steam in the casing gets into the annular box of bleeding through a plurality of heat absorption holes, and finally steam is outside through a plurality of heat dissipation holes and a plurality of louvre discharge casing, has realized that the circulation between the gas in the casing and the casing outer air exchanges, has realized the heat dissipation to components and parts. In order to improve the heat dissipation speed of the components, the automatic plugging assembly is used for plugging the heat dissipation holes, then the exhaust assembly is used for extracting gas in the annular air exhaust box and sending the gas into the heat dissipation holes, finally the hot gas is exhausted out of the side wall of the shell through the heat dissipation holes, the heat dissipation speed and the heat dissipation effect of the components are improved, the components are prevented from being damaged due to overhigh working temperature to the greatest extent, and the service life of the switching power supply is prolonged.

Optionally, the exhaust subassembly includes aiutage, exhaust tube and blast pipe, the aiutage sets up in the heat extraction intracavity, the one end and the inside intercommunication of aiutage of exhaust tube, the other end and the inside intercommunication of annular air exhaust box of exhaust tube, the one end and the inside intercommunication of aiutage of blast pipe, the other end and the louvre intercommunication of blast pipe, all be equipped with automatically controlled valve in blast pipe and the air exhaust tube, it is equipped with the piston to slide in the aiutage, be connected with the pull rod on the piston, one side end wall of aiutage is equipped with flexible hole, the one end that the piston was kept away from to the pull rod passes flexible hole and stretches out outside the end wall of aiutage, be equipped with the reciprocating driving piece that is used for driving the pull rod to slide along the axial of aiutage in the heat extraction intracavity.

Through adopting above-mentioned technical scheme, when bleeding to the steam in the annular bleed box, close the automatically controlled valve in the blast pipe earlier, open the automatically controlled valve in the bleed pipe simultaneously, utilize reciprocating drive piece drive pull rod to slide to the flexible hole direction, and then drive the piston and slide in step to in passing through the bleed pipe suction aiutage with the steam in the annular bleed box. When the piston slides to the exhaust pipe and is far away from the side wall of the exhaust pipe, the reciprocating driving piece is used for driving the pull rod to slide towards the direction of keeping away from the telescopic hole, then the piston is used for sending hot air in the exhaust pipe into the radiating hole through the exhaust pipe, and finally the hot air is discharged out of the shell through the radiating hole, so that the speed of discharging the hot air in the annular air exhaust box out of the shell is accelerated.

Optionally, the reciprocating driving element comprises a gear and a rack, the gear is rotatably connected to the wall of the heat discharging cavity, the rack is fixedly arranged at one end, far away from the piston, of the pull rod, the rack is meshed with the gear, and a first motor used for driving the gear to rotate is arranged in the heat discharging cavity.

Through adopting above-mentioned technical scheme, start first motor, first motor drive gear rotates, and the gear drives the reciprocal lift of rack, and then the rack drives the reciprocal lift of pull rod.

Optionally, the automatic plugging assembly comprises a sealing plate for plugging the heat dissipation holes, an operation cavity is arranged inside the side wall of the shell and between two adjacent heat dissipation holes, two adjacent heat dissipation holes are provided with sliding holes for the sealing plate to extend into the operation cavity, and a linkage part for driving the sealing plate in the two adjacent heat dissipation holes to be close to or away from each other is arranged in the operation cavity.

By adopting the technical scheme, the linkage piece is utilized to drive the two closing plates to be away from each other, so that the closing plates penetrate through the sliding holes and extend into the heat dissipation holes, and the heat dissipation holes are blocked by the closing plates; the linkage piece is utilized to drive the two closing plates to approach each other so as to extend the closing plates into the operation cavity from the sliding hole, and therefore hot air in the shell naturally flows out of the shell through the heat dissipation holes.

Optionally, the linkage piece includes electric jar and linkage piece, the cylinder body of electric jar is fixed on the chamber wall in operation chamber, the piston rod and the linkage piece of electric jar link to each other, the slip direction of the flexible direction perpendicular to closing plate of the piston rod of electric jar, the linkage piece is located between two closing plates, the relative lateral wall of linkage piece and closing plate all is equipped with the complex linkage scarf that slides each other, two the closing plate all slides with the linkage piece and is connected.

By adopting the technical scheme, the electric cylinder is started, the piston rod of the electric cylinder retracts to drive the linkage block to slide towards the direction close to the electric cylinder, and the two closing plates are far away from each other along with the sliding of the linkage block due to the arrangement of the linkage wedge surface; when the piston rod of the electric cylinder extends out, the two closing plates are driven to be away from each other through the linkage block.

Optionally, cooling discharge cavities are formed in the top wall and the bottom wall of the shell, inflatable cushions are arranged in the two cooling discharge cavities, arc-shaped cooling plates are arranged in the cooling discharge cavities and located on two sides of the inflatable cushions, inner arc walls of the arc-shaped cooling plates face the side walls of the inflatable cushions and are provided with a plurality of refrigerating sheets, air inlet pipes are arranged on the side walls of the inflatable cushions, air inlet holes are formed in the side walls of the shell, one ends of the air inlet pipes, far away from the inflatable cushions, extend into the air inlet holes and are sleeved with sealing covers, sealing plugs for inserting into the air inlet pipes are arranged on the inner side walls of the sealing covers, and opening and closing assemblies for driving the sealing covers to extend out of the side walls of the shell are arranged in the cooling discharge cavities;

the equipartition is equipped with a plurality of heat dissipation boxes in the casing, the equipartition is equipped with a plurality of cooling holes on the lateral wall of heat dissipation box towards components and parts, and is a plurality of all the intercommunication is equipped with a plurality of hoses of supplying gas on the lateral wall of heat dissipation box, the one end that the heat dissipation box was kept away from to the hose of supplying gas stretches into row cold intracavity and is linked together with inflatable packer, inflatable packer's both sides wall all is equipped with the push pedal, the lateral wall that inflatable packer was kept away from in the push pedal is equipped with the permanent magnet, just be provided with the electro-magnet to the permanent magnet on the chamber wall in row cold chamber, be equipped with first spring between the relative lateral wall of permanent magnet and electro-magnet.

Through adopting above-mentioned technical scheme, outside utilizing the sealed lateral wall that stretches out the casing of opening and close subassembly drive, the sealing plug stretched out in the intake pipe this moment, and outdoor air passes through the intake pipe and gets into the inflatable packer this moment, has realized the automatic charging of inflatable packer. After the refrigerating sheet is charged, the refrigerating sheet generates cold air so as to cool the gas in the inflatable cushion. Utilize the sealed lid of opening and close subassembly drive to stretch into in the inlet port for the sealing plug is to the intake pipe shutoff, avoids the air conditioning after the cooling in the inflatable packer to leak. Then to the electro-magnet outage, the electro-magnet outage back magnetic field force disappears, utilizes the elasticity of first spring this moment, for the permanent magnet provides the power that slides to the inflatable packer direction, and then extrudees the inflatable packer through two push pedals for air conditioning in the inflatable packer gets into in the heat dissipation box through a plurality of hoses of supplying gas, air conditioning in the final heat dissipation box gets into in the casing through a plurality of cooling holes, has accelerated the cooling heat dissipation to components and parts.

Optionally, the opening and closing assembly comprises a second spring and two winding shafts, the second spring is sleeved on the air inlet pipe, one end of the second spring is connected with the pipe wall of the air inlet pipe, the other end of the second spring is connected with the sealing cover, an annular cavity communicated with the air inlet is formed in the side wall of the shell, the winding shafts are connected in the annular cavity in a rotating mode, the winding shafts are wound with winding ropes, one ends, far away from the winding shafts, of the winding ropes are connected with the sealing cover, the air inlet pipe is located between the two winding ropes, and a second motor used for driving the winding shafts to rotate is arranged in the annular cavity.

By adopting the technical scheme, the second electric cylinder is started, the winding shaft is driven to rotate forwards or reversely so as to be convenient for the winding shaft to wind or unwind the winding rope, and when the winding rope is wound, the sealing cover slides towards the air inlet hole by utilizing the two winding ropes so as to insert the sealing plug into the air inlet pipe; when the winding rope is unreeled, the sealing cover loses tension, and the elastic force of the second spring is utilized to provide force extending out of the air inlet hole for the sealing cover, so that the sealing plug is conveniently moved out of the air inlet pipe, and the inflatable cushion is conveniently and automatically inflated.

Optionally, the electromagnet is connected with a power control circuit, and the power control circuit includes:

the temperature sensor is arranged in the middle of the inner top wall of the shell and outputs a temperature sensing signal at the output end of the temperature sensor;

the judging circuit is connected to the output end of the temperature sensor and compares the received temperature sensing signal with a reference signal to output a control signal;

and the opening and closing circuit is connected to the output end of the judging circuit and used for controlling the on-off between the electromagnet and the power supply VCC3 according to the control signal.

By adopting the technical scheme, the temperature sensor is utilized to detect the temperature value signal in the shell in real time, the temperature value signal is transmitted to the judging circuit, the judging circuit is preset with the reference signal, when the detected temperature value is larger than the temperature value corresponding to the reference signal, the judging circuit outputs a control signal to the on-off circuit, and the on-off circuit cuts off the connection between the electromagnet and the power VCC.

Optionally, the determining circuit includes:

the reference signal generating circuit comprises a resistor R1 and a resistor R2 which are connected in series, wherein one end of the resistor R1 is connected with one end of a resistor R2, the other end of the resistor R1 is connected with a power supply VCC1, the other end of the resistor R2 is grounded, and a reference signal is generated between the resistor R1 and the resistor R2;

the comparator A is provided with a non-inverting input end, an inverting input end and an output end, the non-inverting input end is connected with the output end of the temperature sensor, the inverting input end is connected between the resistor R1 and the resistor R2, and the output end outputs a control signal.

By adopting the technical scheme, the reference signal generating circuit is utilized to generate the reference signal, the reference signal corresponds to the reference voltage value, and the reference voltage value is input into the reverse input end of the comparator A; meanwhile, a voltage value corresponding to the temperature value detected by the temperature sensor is input to the homodromous input end of the comparator A, and the voltage value corresponding to the temperature sensing signal is compared with a reference voltage value corresponding to the reference signal by the comparator A.

Optionally, the open/close circuit includes:

an NPN triode Q1, the emitter of which is grounded, the base of which is connected with the output end of the comparator A through a resistor R3 and is grounded with the emitter through a resistor R4;

a normally closed relay KM1, the first end of the coil of which is connected to a power supply VCC2, the second end of the coil of which is connected to the collector of an NPN triode Q1, and the normally closed contact switch S1 of which is connected in series between the electromagnet and the power supply VCC 3;

a diode D1 having a cathode connected to a first end of the coil of the normally closed relay KM1 and an anode connected to a second end of the coil of the normally closed relay KM 1.

By adopting the technical scheme, when the temperature sensor detects that the voltage value corresponding to the temperature value in the shell is greater than the reference voltage of the comparator A, the output end of the comparator A outputs a high-level signal, the NPN triode Q1 is conducted at the moment, the coil of the normally closed relay KM1 is electrified, the normally closed contact switch S1 of the normally closed relay KM1 is disconnected, the electromagnet and the power supply VCC3 are disconnected at the moment, and then the electromagnet is powered off; on the contrary, when the voltage value corresponding to the distance detected by the distance sensor is smaller than the reference voltage of the comparator a, the normally closed contact switch S1 of the normally closed relay KM1 is closed, and at this time, the power supply VCC3 is connected to the electromagnet.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the automatic plugging assembly is used for plugging the heat dissipation holes, the exhaust assembly is used for extracting gas in the annular air extraction box and sending the gas into the heat dissipation holes, and finally the hot gas is exhausted out of the side wall of the shell through the heat dissipation holes, so that the heat dissipation speed and the heat dissipation effect of the components are improved, the components are prevented from being damaged due to overhigh working temperature to the greatest extent, and the service life of the switching power supply is prolonged;

2. utilize the elasticity of first spring, for the permanent magnet provides the power that slides to the inflatable packer direction, and then extrudees the inflatable packer through two push pedals for the air conditioning in the inflatable packer gets into in the heat dissipation box through a plurality of hoses of supplying gas, and the air conditioning in the box that finally dispels the heat gets into in the casing through a plurality of cooling holes, has accelerated the cooling heat dissipation to components and parts.

Drawings

Fig. 1 is a schematic diagram of an overall structure of a DC-DC switching power supply in an embodiment of the present application.

Fig. 2 is a sectional view taken along the plane a-a in fig. 1.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is an enlarged view at B in fig. 2.

Fig. 5 is an enlarged view at C in fig. 2.

FIG. 6 is a schematic cross-sectional view of an embodiment of the present application showing the positional relationship between the inflatable cushion and the curved cooling plate.

Fig. 7 is an enlarged view at D in fig. 2.

Fig. 8 is a schematic diagram of a power control circuit according to an embodiment of the present application.

Description of reference numerals: 1. a housing; 2. a component; 3. heat dissipation holes; 4. an annular pumping box; 5. heat removal holes; 6. a heat absorption hole; 7. a heat removal cavity; 8. an exhaust assembly; 81. an exhaust funnel; 82. an air exhaust pipe; 83. an exhaust pipe; 84. an electrically controlled valve; 85. a piston; 86. a pull rod; 87. a telescopic hole; 9. a reciprocating drive member; 91. a gear; 92. a rack; 93. a first motor; 10. an automatic plugging component; 101. a closing plate; 102. an operating chamber; 103. a sliding hole; 11. a linkage member; 111. an electric cylinder; 112. a linkage block; 113. a linkage wedge surface; 114. connecting blocks; 115. connecting grooves; 12. a cold discharge cavity; 13. an inflatable cushion; 14. an arc-shaped cooling plate; 15. a refrigeration plate; 16. an air inlet pipe; 17. an air inlet; 18. a sealing cover; 19. a sealing plug; 20. a heat dissipation box; 201. a moisture absorption cloth layer; 21. an air supply hose; 22. pushing the plate; 23. a permanent magnet; 24. an electromagnet; 25. a first spring; 26. an opening and closing assembly; 261. a second spring; 262. a winding shaft; 263. winding the rope; 264. an annular cavity; 265. a second motor; 27. a power supply control circuit; 271. a temperature sensor; 272. a judgment circuit; 2721. a reference signal generation circuit; 273. and opening and closing the circuit.

Detailed Description

The present application is described in further detail below with reference to figures 1-8.

The embodiment of the application discloses a DC-DC switching power supply. Referring to fig. 1 and 2, the switching power supply includes a casing 1 having a rectangular cross section, and three sets of devices are disposed inside the casing 1, where each set of devices includes a plurality of components 2 arranged in sequence along a width direction of the casing 1. All be equipped with louvre 3 on the lateral wall all around of casing 1, louvre 3 on every lateral wall of casing 1 has two, and two louvres 3 set up along casing 1's direction of height relatively. Because switching power supply is at the during operation, inside components and parts 2 can produce steam, through a plurality of louvres 3 on the casing 1 lateral wall, the circulation in the inside air of casing 1 and the outdoor air of being convenient for has realized the heat dissipation cooling to components and parts 2.

Referring to fig. 2, an annular air pumping box 4 is arranged in a casing 1, the cross section of the annular air pumping box 4 is rectangular, the outer annular wall of the annular air pumping box 4 is fixedly arranged on the inner side wall of the casing 1, the inner annular wall of the annular air pumping box 4 faces a plurality of components 2, a plurality of heat absorption holes 6 are uniformly distributed on the inner annular wall of the annular air pumping box 4, and heat extraction holes 5 which are in one-to-one correspondence with a plurality of heat dissipation holes 3 are formed in the outer annular wall of the annular air pumping box 4. When the open-source power supply is used, hot air in the shell 1 enters the annular air exhaust box 4 through the heat absorption holes 6, the hot air entering the annular air exhaust box 4 sequentially passes through the heat exhaust holes 5 and the heat dissipation holes 3 and is exhausted out of the side wall of the shell 1, circulation of the hot air in the shell 1 and the hot air outside the shell 1 is achieved, and cooling and heat dissipation of the components and parts 2 in the shell 1 are facilitated.

In this embodiment, inside being equipped with a plurality of heat dissipation chambeies 7 of casing 1's inside, the quantity of a plurality of heat dissipation chambeies 7 can be four, and four heat dissipation chambeies 7 set up respectively in the inside four corners of casing 1 lateral wall, and wherein, all be equipped with in every heat dissipation chamber 7 and be used for the gaseous extraction in the annular box 4 of taking out and send into the exhaust subassembly 8 in the louvre 3, are equipped with the automatic shutoff subassembly 10 that is used for shutoff louvre 3 in the heat dissipation chamber 7.

In order to further improve the heat dissipation speed of the component 2, the automatic plugging component 10 is firstly used for plugging the heat dissipation holes 3, and meanwhile, the exhaust component 8 is used for sending hot air in the annular air exhaust box 4 into the heat dissipation holes 3, so that the hot air in the annular air exhaust box 4 is exhausted out of the side wall of the shell 1 through the heat dissipation holes 3, and the speed of exhausting the hot air out of the shell 1 is increased; and finally, the automatic plugging assembly 10 is utilized to open the heat dissipation holes 3, so that air outside the shell 1 conveniently enters the shell 1 through the heat dissipation holes 3, the heat dissipation holes 5 and the heat absorption holes 6, the cooling and heat dissipation of the components 2 are realized, and the problem that the service life of the components 2 is influenced due to overhigh working temperature is avoided as much as possible.

Referring to fig. 2 and 3, the exhaust assembly 8 includes an exhaust cylinder 81, the exhaust cylinder 81 is vertically disposed in the exhaust cavity 7, a piston 85 is slidably disposed in the exhaust cylinder 81, the piston 85 is made of rubber, and a peripheral wall of the piston 85 is closely attached to an inner wall of the exhaust cylinder 81. The top wall of the piston 85 is fixedly provided with a vertically arranged pull rod 86, the top wall of the exhaust cylinder 81 is provided with a telescopic hole 87, one end, far away from the piston 85, of the pull rod 86 penetrates through the telescopic hole 87 and extends out of the top wall of the exhaust cylinder 81, the pull rod 86 is connected in the telescopic hole 87 in a sliding mode, and a reciprocating driving piece 9 used for driving the pull rod 86 to slide in a reciprocating mode along the axial direction of the pull rod 86 is arranged in the heat exhaust cavity 7.

An exhaust pipe 82 is fixedly arranged on the circumferential wall of the exhaust funnel 81, one end of the exhaust pipe 82 is communicated with the inside of the exhaust funnel 81, the other end of the exhaust pipe 82 is communicated with the inside of the annular exhaust box 4, an exhaust pipe 83 is fixedly arranged on the bottom wall of the exhaust funnel 81, one end of the exhaust pipe 83 is communicated with the inside of the exhaust funnel 81, and the other end of the exhaust pipe 83 is communicated with the heat dissipation hole 3. In this embodiment, the exhaust pipe 83 and the exhaust pipe 82 are provided with electrically controlled valves 84.

When heat is dissipated, the electric control valve 84 in the exhaust pipe 82 is opened firstly, and the electric control valve 84 in the exhaust pipe 83 is closed; then, the reciprocating driving piece 9 is used for driving the pull rod 86 to move upwards along the vertical direction, so that hot air in the annular air pumping box 4 is pumped into the exhaust cylinder 81 through the piston 85 and the air pumping pipe 82, and meanwhile, the speed of the hot air in the shell 1 entering the annular air pumping box 4 through the plurality of heat absorption holes 6 is increased by pumping air into the annular air pumping box 4; when the roof of piston 85 and the interior roof of aiutage 81 are laminated, open the automatically controlled valve 84 in the blast pipe 83, close the automatically controlled valve 84 in the exhaust tube 82, utilize the reciprocating drive piece 9 drive pull rod 86 to move down along vertical direction, and then pass through the piston 85 with the steam in the exhaust tube 81 through the blast pipe 83 send into in the louvre 3, finally steam passes through the louvre 3 outside the lateral wall of discharge casing 1, accelerated the steam exhaust speed in the casing 1, avoid components and parts 2 to influence life because of operating temperature is too high as far as possible.

Referring to fig. 2 and 3, the reciprocating driving member 9 includes a first motor 93 fixedly disposed on the wall of the heat discharging cavity 7, a gear 91 is fixedly connected coaxially to a driving shaft of the first motor 93, a rack 92 is engaged with one side of the gear 91, the rack 92 is vertically disposed, and a bottom end of the rack 92 is fixedly connected to a top end of the pull rod 86. When the first motor 93 is started, the driving gear 91 rotates, and the pull rod 86 is connected with the exhaust cylinder 81 in a sliding manner, so that the rack 92 drives the pull rod 86 to lift along with the rotation of the gear 91, and the pull rod 86 drives the piston 85 to slide in the exhaust cylinder 81 in a reciprocating manner.

Referring to fig. 2 and 4, the automatic plugging assemblies 10 have four groups, four groups of automatic plugging assemblies 10 respectively correspond to four side walls of the housing 1 one to one, and each group of automatic plugging assemblies 10 is used for simultaneously plugging two heat dissipation holes 3 on one side wall of the housing 1. One set of automatic plugging components 10 includes two closing plates 101 that set up relatively along the direction of height of casing 1, and two closing plates 101 correspond with two louvres 3 one-to-one respectively, and closing plate 101 is used for plugging louvre 3, and the operation chamber 102 has been seted up to the inside just being located between two adjacent louvres 3 of lateral wall of casing 1.

The hole walls of two adjacent heat dissipation holes 3 are provided with sliding holes 103 communicated with the operation cavity 102, the sliding holes 103 are used for sliding the closing plates 101 to the operation cavity 102, one ends, close to each other, of two adjacent closing plates 101 extend into the operation cavity 102, and linkage pieces 11 used for driving the two adjacent closing plates 101 to be close to or far away from each other are arranged in the operation cavity 102. The two closing plates 101 are driven to approach each other by the linkage 11, so that the closing plates 101 slide into the operation cavity 102 from the sliding holes 103, and the heat dissipation holes 3 are opened; on the contrary, the two closing plates 101 are driven to move away from each other by the linkage 11, so that the closing plates 101 slide to the heat dissipation holes 3, and the heat dissipation holes 3 are blocked.

Referring to fig. 4, the linkage 11 includes an electric cylinder 111 fixedly disposed on the wall of the operation chamber 102, the extension direction of a piston 85 of the electric cylinder 111 is perpendicular to the sliding direction of the closing plates 101, a linkage block 112 is connected to a piston rod of the electric cylinder 111, the linkage block 112 extends between two adjacent closing plates 101, linkage wedge surfaces 113 which are in sliding fit with each other are disposed on opposite side walls of the linkage block 112 and the closing plates 101, and the longitudinal sectional area of the linkage block 112 increases progressively from a side close to the electric cylinder 111 to a side far away from the electric cylinder 111.

In this embodiment, the side wall of the linkage block 112 located on the linkage wedge surface 113 is provided with a connection groove 115, the side wall of the closing plate 101 located on the linkage wedge surface 113 is provided with a connection block 114 sliding in the connection groove 115, and the connection block 114 and the connection groove 115 are matched to realize sliding connection between the linkage block 112 and the closing plate 101. Starting the electric cylinder 111, extending a piston rod of the electric cylinder 111, driving the linkage block 112 to slide towards the direction close to the inside of the shell 1, and enabling the two closing plates 101 to be close to each other at the moment; on the contrary, when the piston rod of the electric cylinder 111 retracts, the linkage block 112 slides towards the direction close to the outer side wall of the housing 1, and then the linkage block 112 pushes the two sealing plates 101 to move away from each other, so that the sealing plates 101 block the heat dissipation holes 3.

Referring to fig. 2 and 5, in order to further improve the heat dissipation speed of the component 2 in the housing 1, the top wall and the bottom wall of the housing 1 are both provided with the cooling discharge chambers 12, and the two cooling discharge chambers 12 are both provided with the horizontally arranged inflatable cushions 13, in this embodiment, the inflatable cushions 13 are automatic inflatable cushions 13, and the side walls of the automatic inflatable cushions 13 facing away from the inside of the housing 1 are communicated with each other and provided with the air inlet pipes 16. An air inlet 17 communicated with the cold discharge cavity 12 is arranged on the side wall of the shell 1, and one end of the air inlet pipe 16 far away from the inflatable cushion 13 extends into the air inlet pipe 16. One end of the air inlet pipe 16, which is positioned in the air inlet hole 17, is sleeved with a sealing cover 18, a sealing plug 19 for being inserted into the air inlet pipe 16 is arranged on the side wall of the sealing cover 18, which faces the air inlet pipe 16, and the peripheral wall of the sealing plug 19 is tightly attached to the inner pipe wall of the air inlet pipe 16. An opening and closing assembly 26 for driving the sealing cover 18 to extend out of the side wall of the shell 1 is arranged in the cold discharge cavity 12, and the opening and closing assembly 26 is used for driving the sealing cover 18 to extend out of the side wall of the shell 1, so that the inflatable cushion 13 is automatically inflated and expanded.

Referring to fig. 5 and 6, arc-shaped cooling plates 14 are fixedly arranged in the cooling discharge chamber 12 and on both sides of the inflatable cushion 13, the inner arc walls of the arc-shaped cooling plates 14 face the inflatable cushion 13, and a plurality of refrigerating fins 15 are fixedly arranged on the inner arc walls of the arc-shaped cooling plates 14. After the refrigerating sheet 15 is powered on, the refrigerating sheet 15 generates cold air, and the air in the inflatable cushion 13 is cooled through the refrigerating sheet 15.

The side wall of the inflatable cushion 13 facing the inside of the housing 1 is provided with a plurality of air supply hoses 21 in a communicating manner, in this embodiment, the number of the plurality of air supply hoses 21 may be three, one end of the air supply hose 21 far away from the inflatable cushion 13 extends into the inside of the housing 1 and is provided with a heat dissipation box 20 in a communicating manner, the height direction of the heat dissipation box 20 is the same as the height direction of the housing 1, the heat dissipation box 20 is located between two adjacent device groups, and the side wall of the heat dissipation box 20 facing the device 2 is uniformly provided with a plurality of cooling holes.

In this embodiment, both sides wall of inflatable packer 13 is fixed with push pedal 22, and fixed permanent magnet 23 that is equipped with on the lateral wall that inflatable packer 13 was kept away from to push pedal 22, arranges cold chamber 12 and fixes being equipped with electro-magnet 24 on just facing the chamber wall of permanent magnet 23, links to each other through first spring 25 between the relative lateral wall of permanent magnet 23 and electro-magnet 24, and first spring 25 is used for providing the power that slides to keeping away from electro-magnet 24 direction for permanent magnet 23.

When the electromagnet 24 is electrified, the electromagnet 24 generates magnetic field force, and then the permanent magnet 23 gradually approaches to the electromagnet 24, at the moment, the first spring 25 compresses to store energy, and the push plates 22 on the two side walls of the inflatable cushion 13 are far away from each other, so that the inflatable cushion 13 is opened, and the inflatable cushion 13 can automatically suck air and expand through the air inlet pipe 16; when cutting off the power supply with electro-magnet 24, electro-magnet 24 loses magnetic field force, utilize the elasticity restoring force of first spring 25 this moment, promote push pedal 22 and remove to keeping away from electro-magnet 24 direction, and then two push pedal 22 are close to each other, to inflatable packer 13 extrusion, along with the volume in the inflatable packer 13 reduces gradually, and then the gas after the inflatable packer 13 internal cooling gets into in heat-dissipating box 20 through a plurality of hoses 21 of supplying gas, finally the cooling gas in the heat-dissipating box 20 flows to inside the casing 1 through a plurality of cooling holes, the heat dissipation cooling rate to components and parts 2 has been improved.

Referring to fig. 5, the moisture absorption cloth layer 201 is fixed on the inner side wall of the heat dissipation box 20, and the temperature of the gas discharged from the heat dissipation holes 3 is low, so that the moisture absorption cloth layer 201 absorbs the moisture of the cooling gas flowing into the housing 1, thereby reducing the humidity in the housing 1 and avoiding the damage of the component 2 due to the moisture as much as possible.

Referring to fig. 5 and 7, the opening and closing assembly 26 includes a second spring 261 sleeved on the air inlet pipe 16, one end of the second spring 261 is connected to a side wall of the air inlet pipe 16, the other end of the second spring 261 is connected to the sealing cover 18, and the second spring 261 is used for providing a force for the sealing cover 18 to extend out of the air inlet hole 17.

The sealing cover 18 is provided with a winding rope 263 fixedly connected to two sides of the second spring 261, an annular cavity 264 communicated with the air inlet hole 17 is formed in the side wall of the shell 1, one end, far away from the sealing cover 18, of the winding rope 263 extends into the annular cavity 264 and is connected with a winding shaft 262, the winding rope 263 is wound on the winding shaft 262, and a second motor 265 used for driving the winding shaft 262 to rotate is arranged in the annular cavity 264.

The two second motors 265 are started simultaneously, then the two winding shafts 262 rotate, the winding ropes 263 are wound or unwound along with the rotation of the winding shafts 262, when the winding ropes 263 are wound, the sealing covers 18 are pulled into the air inlet holes 17 through the two winding ropes 263, so that the sealing plugs 19 are inserted into the air inlet pipe 16, the air inlet pipe 16 is blocked, and at the moment, the second springs 261 are in a compressed state; when the winding rope 263 is unwound, the sealing cover 18 loses tension, the elastic restoring force of the second spring 261 is utilized to push the sealing cover 18 to extend out of the air inlet hole 17, meanwhile, the sealing plug 19 extends out of the air inlet pipe 16, so that outdoor air can enter the inflatable cushion 13 through the air inlet pipe 16, and automatic inflation of the inflatable cushion 13 is realized.

Referring to fig. 8, a power control circuit 27 is connected to the electromagnet 24, and the power control circuit 27 includes:

the temperature sensor 271 is arranged at the middle position of the inner top wall of the shell 1, and the output end of the temperature sensor 271 outputs a signal of the temperature sensor 271;

a judging circuit 272 connected to the output end of the temperature sensor 271, comparing the received temperature sensing signal with the reference signal and outputting a control signal;

and the on-off circuit 273 is connected to the output end of the judging circuit 272, and is used for controlling the on-off between the electromagnet 24 and the power supply VCC3 according to the control signal.

The temperature sensor 271 is used to detect the actual temperature value in the housing 1 in real time, and transmit the temperature sensing signal to the determining circuit 272 in real time. The judgment circuit 272 is preset with a temperature reference signal, when the actual temperature value is greater than the temperature reference value corresponding to the preset reference signal, the output end of the judgment circuit 272 outputs a control signal to the on-off circuit 273, at this time, the on-off circuit 273 cuts off the connection between the electromagnet 24 and the VCC3 according to the control signal, at this time, the electromagnet 24 loses the power supply, and the magnetic field force of the electromagnet 24 disappears.

Referring to fig. 8, the determination circuit 272 includes:

a reference signal generating circuit 2721 including a resistor R1 and a resistor R2 connected in series, wherein the other end of the resistor R1 is connected to a power source VCC1, the other end of the resistor R2 is grounded, and a reference signal is generated between a resistor R1 and a resistor R2;

the comparator a has a non-inverting input terminal, an inverting input terminal and an output terminal, the non-inverting input terminal is connected to the output terminal of the temperature sensor 271, the inverting input terminal is connected between the resistor R1 and the resistor R2, and the output terminal outputs a control signal.

The open/close circuit 273 includes:

an NPN triode Q1, the emitter of which is grounded, the base of which is connected with the output end of the comparator A through a resistor R3 and is grounded with the emitter through a resistor R4;

a normally closed relay KM1, the first end of the coil of which is connected to a power supply VCC2, the second end of the coil of which is connected to the collector of an NPN triode Q1, and the normally closed contact switch S1 of which is connected in series between the electromagnet 24 and the power supply VCC 3;

a diode D1 having a cathode connected to a first end of the coil of the normally closed relay KM1 and an anode connected to a second end of the coil of the normally closed relay KM 1.

When the temperature sensor 271 detects that the voltage value corresponding to the actual temperature in the shell 1 is greater than the reference voltage of the comparator a, the output end of the comparator a outputs a high-level signal, the NPN triode Q1 is turned on at this time, the coil of the normally-closed relay KM1 is energized, the normally-closed contact switch S1 of the normally-closed relay KM1 is turned off, the electromagnet 24 and the power source VCC3 are turned off at this time, and the electromagnet 24 is further turned off; on the contrary, when the voltage value corresponding to the distance detected by the distance sensor 141 is smaller than the reference voltage of the comparator a, the normally closed contact switch S1 of the normally closed relay KM1 is closed, and the power source VCC3 is connected to the electromagnet 24.

The implementation principle of the DC-DC switching power supply in the embodiment of the present application is as follows: when the open-source power supply works, the components 2 in the shell 1 generate heat, then hot air in the shell 1 enters the annular air exhaust box 4 through the heat absorption holes 6, and the hot air entering the annular air exhaust box 4 is discharged out of the shell 1 through the heat discharge holes 5 and the heat dissipation holes 3 in sequence; on the contrary, the air outside the shell 1 sequentially passes through the heat dissipation holes 3, the heat dissipation holes 5 and the heat absorption holes 6 to enter the shell 1, so that the exchange between the hot air inside the shell 1 and the air outside the shell 1 is realized, and the cooling and heat dissipation of the components 2 inside the shell 1 are facilitated.

In order to further enhance the heat dissipation speed of the component 2, the electric cylinder 111 is started, the piston rod of the electric cylinder 111 retracts, and the two sealing plates 101 are driven to move away from each other through the linkage block 112, so that the sealing plates 101 block the heat dissipation holes 3; secondly, closing the electric control valve 84 in the exhaust pipe 83, opening the electric control valve 84 in the exhaust pipe 82, starting the first motor 93, driving the gear 91 to rotate by the first motor 93, driving the rack 92 to slide towards one side far away from the pull rod 86 by the gear 91, and then pulling the piston 85 to slide in the exhaust funnel 81 by the pull rod 86, and at the moment, pumping hot gas in the annular exhaust box 4 into the exhaust funnel 81 through the exhaust pipe 82; when the piston 85 slides to the inner top wall of the exhaust pipe 81 located in the telescopic hole 87, the electric control valve 84 in the exhaust pipe 82 is closed, the electric control valve 84 in the exhaust pipe 83 is opened, the first motor 93 is started, the first motor 93 drives the gear 91 to rotate, the rack 92 is driven to slide towards the direction close to the pull rod 86, the pull rod 86 pushes the piston 85 to slide towards the exhaust pipe 83, so that hot gas in the exhaust pipe 81 is extracted and sent into the heat dissipation hole 3, and finally the hot gas is exhausted out of the shell 1 through the heat dissipation hole 3; by adopting the mode, the speed of hot air in the annular air exhaust box 4 exhausted out of the shell 1 is increased, and the heat dissipation effect of the component 2 in the shell 1 is increased.

The refrigeration sheet 15 is electrified, and the refrigeration sheet 15 generates cold air so as to cool the gas in the inflatable cushion 13. For improving the cooling effect to components and parts 2, utilize temperature sensor 271 real-time detection casing 1 internal temperature value, when temperature value is greater than the benchmark temperature value of settlement, cut off the power supply to electro-magnet 24, and then electro-magnet 24 loses magnetic field force, utilize the elasticity of first spring 25, promote push pedal 22 and remove to inflatable packer 13 direction, extrude inflatable packer 13 through two push pedal 22 this moment, and then the air conditioning in inflatable packer 13 gets into in heat dissipation box 20 through a plurality of air supply hose 21, finally the air conditioning in heat dissipation box 20 gets into in casing 1 through a plurality of cooling holes, realized the cooling heat dissipation to components and parts 2.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (6)

1. The utility model provides a switching power supply, includes casing (1), be equipped with a plurality of components and parts (2) in casing (1), its characterized in that: the heat dissipation device is characterized by further comprising an annular air exhaust box (4), two opposite heat dissipation holes (3) are formed in the peripheral wall of the shell (1), the outer annular wall of the annular air exhaust box (4) is fixed to the inner side wall of the shell (1), the inner annular wall of the annular air exhaust box (4) faces towards the plurality of components (2), the inner annular wall of the annular air exhaust box (4) is provided with a plurality of heat absorption holes (6), the outer annular wall of the annular air exhaust box (4) is provided with heat dissipation holes (5) corresponding to the plurality of heat dissipation holes (3) one by one, the inner side wall of the shell (1) is provided with a plurality of heat dissipation cavities (7), air exhaust assemblies (8) used for extracting air in the annular air exhaust box (4) and sending the air into the heat dissipation holes (3) are arranged in the heat dissipation cavities (7), and automatic plugging assemblies (10) used for plugging the heat dissipation holes (3) are arranged in the heat dissipation cavities (7);

the exhaust assembly (8) comprises an exhaust funnel (81), an exhaust pipe (82) and an exhaust pipe (83), the exhaust funnel (81) is arranged in the heat exhaust cavity (7), one end of the exhaust pipe (82) is communicated with the inside of the exhaust funnel (81), the other end of the exhaust pipe (82) is communicated with the inside of the annular exhaust box (4), one end of the exhaust pipe (83) is communicated with the inside of the exhaust funnel (81), the other end of the exhaust pipe (83) is communicated with the heat dissipation holes (3), electric control valves (84) are arranged in the exhaust pipe (83) and the exhaust pipe (82), a piston (85) is arranged in the exhaust funnel (81) in a sliding mode, a pull rod (86) is connected onto the piston (85), a telescopic hole (87) is arranged on the end wall of one side of the exhaust funnel (81), one end, far away from the piston (85), of the pull rod (86) penetrates through the telescopic hole (87) and extends out of the end wall of the exhaust funnel (81), a reciprocating driving piece (9) for driving the pull rod (86) to slide along the axial direction of the exhaust funnel (81) is arranged in the heat exhaust cavity (7);

the reciprocating driving piece (9) comprises a gear (91) and a rack (92), the gear (91) is rotatably connected to the wall of the heat discharging cavity (7), the rack (92) is fixedly arranged at one end, far away from the piston (85), of the pull rod (86), the rack (92) is meshed with the gear (91), and a first motor (93) for driving the gear (91) to rotate is arranged in the heat discharging cavity (7);

the automatic plugging assembly (10) comprises a sealing plate (101) for plugging the heat dissipation holes (3), an operation cavity (102) is arranged inside the side wall of the shell (1) and between two adjacent heat dissipation holes (3), sliding holes (103) for the sealing plate (101) to extend into the operation cavity (102) are formed in the hole walls of the two adjacent heat dissipation holes (3), and linkage members (11) for driving the sealing plates (101) in the two adjacent heat dissipation holes (3) to be close to or far away from each other are arranged in the operation cavity (102);

linkage (11) are including electric jar (111) and linkage piece (112), the cylinder body of electric jar (111) is fixed on the chamber wall of operation chamber (102), the piston rod of electric jar (111) links to each other with linkage piece (112), the flexible direction perpendicular to the glide direction of closing plate (101) of the piston rod of electric jar (111), linkage piece (112) are located between two closing plates (101), the relative lateral wall of linkage piece (112) and closing plate (101) all is equipped with mutual slip complex linkage scarf (113), two closing plate (101) all with linkage piece (112) sliding connection.

2. The switching power supply according to claim 1, characterized in that: the inner parts of the top wall and the bottom wall of the shell (1) are respectively provided with a cold discharge cavity (12), the two cold discharge cavities (12) are respectively provided with an inflatable cushion (13), arc-shaped cooling plates (14) are arranged in the cold discharge cavity (12) and positioned at two sides of the inflatable cushion (13), the inner arc wall of the arc-shaped cooling plate (14) faces the side wall of the inflatable cushion (13) and is provided with a plurality of refrigerating sheets (15), an air inlet pipe (16) is arranged on the side wall of the inflatable cushion (13), an air inlet hole (17) is arranged on the side wall of the shell (1), one end of the air inlet pipe (16) far away from the inflatable cushion (13) extends into the air inlet hole (17) and is sleeved with a sealing cover (18), the inner side wall of the sealing cover (18) is provided with a sealing plug (19) which is inserted into the air inlet pipe (16), an opening and closing assembly (26) for driving the sealing cover (18) to extend out of the side wall of the shell (1) is arranged in the cold discharge cavity (12);

the equipartition is equipped with a plurality of heat dissipation box (20) in casing (1), heat dissipation box (20) equipartition is equipped with a plurality of cooling holes, and is a plurality of all communicate on the lateral wall of heat dissipation box (20) and be equipped with a plurality of air feed hose (21), the one end that heat dissipation box (20) were kept away from in air feed hose (21) stretches into in row cold chamber (12) and is linked together with inflatable packer (13), the both sides wall of inflatable packer (13) all is equipped with push pedal (22), the lateral wall that inflatable packer (13) was kept away from in push pedal (22) is equipped with permanent magnet (23), just be provided with electro-magnet (24) to permanent magnet (23) on the chamber wall of row cold chamber (12), be equipped with first spring (25) between the relative lateral wall of permanent magnet (23) and electro-magnet (24).

3. The switching power supply according to claim 2, characterized in that: open and close subassembly (26) and include second spring (261) and two rolling axle (262), second spring (261) cover is established on intake pipe (16), the one end of second spring (261) links to each other with the pipe wall of intake pipe (16), the other end of second spring (261) links to each other with sealed lid (18), be equipped with in the lateral wall of casing (1) with annular chamber (264) of inlet port (17) intercommunication, two rolling axle (262) all rotate and connect in annular chamber (264), two all around being equipped with coiling rope (263) on rolling axle (262), the one end that coiling rope (263) were kept away from rolling axle (262) links to each other with sealed lid (18), intake pipe (16) are located between two coiling rope (263), be equipped with in annular chamber (264) and be used for driving rolling axle (262) pivoted second motor (265).

4. The switching power supply according to claim 2, characterized in that: the electromagnet (24) is connected with a power supply control circuit (27), and the power supply control circuit (27) comprises:

the temperature sensor (271) is arranged in the middle of the inner top wall of the shell (1) and outputs a temperature sensing signal at the output end of the temperature sensor;

the judging circuit (272) is connected to the output end of the temperature sensor (271) and compares the received temperature sensing signal with a reference signal to output a control signal;

and the on-off circuit (273) is connected to the output end of the judging circuit (272) and used for controlling the on-off between the electromagnet (24) and the power supply VCC3 according to the control signal.

5. The switching power supply according to claim 4, wherein: the judgment circuit (272) includes:

a reference signal generation circuit (2721) including a resistor R1 and a resistor R2 connected in series, wherein one end of the resistor R1 is connected to one end of the resistor R2, the other end of the resistor R1 is connected to a power supply VCC1, the other end of the resistor R2 is grounded, and a reference signal is generated between the resistor R1 and the resistor R2;

the comparator A is provided with a non-inverting input end, an inverting input end and an output end, the non-inverting input end is connected with the output end of the temperature sensor (271), the inverting input end is connected between the resistor R1 and the resistor R2, and the output end outputs a control signal.

6. The switching power supply according to claim 4, wherein: the open/close circuit (273) includes:

an NPN triode Q1, the emitter of which is grounded, the base of which is connected with the output end of the comparator A through a resistor R3 and is grounded with the emitter through a resistor R4;

a normally closed relay KM1, the first end of the coil of which is connected to a power supply VCC2, the second end of the coil of which is connected to the collector of an NPN triode Q1, and the normally closed contact switch S1 of which is connected in series between the electromagnet (24) and the power supply VCC 3;

a diode D1 having a cathode connected to a first end of the coil of the normally closed relay KM1 and an anode connected to a second end of the coil of the normally closed relay KM 1.

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