High-frequency switching power supply with high-temperature monitoring feedback

Abstract

The application discloses a high-frequency switching power supply with high-temperature monitoring feedback and belongs to the technical field of power supply connecting equipment. The high-frequency switching power supply with high-temperature monitoring feedback comprises a flow guide plate in a shell. The flow guide plate and a circuit board are arranged at intervals to form an air supply channel. A plurality of interval arranged turbulence synapses are arranged in the air supply channel in the cold air flow direction. The turbulence synapses comprise a deformation member and a heated member. The deformation member is made of flexible or elastic material and has an expansion deformation amount. The heated member absorbs the heat radiation of the circuit board. The heated member drives the expansion deformation of the deformation member. The necessary conditions of the driving include that the absorption temperature of the heated member reaches the upper limit of the set temperature. The deformation of the deformation member changes the caliber of the air supply channel. The high-frequency switching power supply with high-temperature monitoring feedback can realize rapid heat dissipation when the temperature of the circuit board exceeds the rated temperature, and can reduce the problems of interference heating and part damage caused by friction.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of power supply connection equipment, and more particularly to a high-frequency switching power supply with high-temperature monitoring feedback. BACKGROUND

[0002] Electronic devices cannot do without reliable power supply, especially switching power supply. Due to technological progress, switching power supply is getting smaller and smaller in size, and getting larger and larger in power. The power device generates a lot of heat when working. If the heat is not dissipated in time, the internal temperature of the power module will rise rapidly and damage the power device, thereby causing module failure.

[0003] The existing patent with application number CN201710713601.0 includes a cooling fan, the cooling fan includes a fan frame and a stator and a rotor accommodated in the fan frame, the rotor can rotate relative to the stator, the rotor is sleeved with a hub and a plurality of fan blades extending outward from the hub, the hub is a hollow structure, the hub includes a shell and a cavity, an annular air bag is arranged on the inner wall of the cavity close to the rotor, the annular air bag contains vinegar, the vinegar boils to generate gas to make the annular air bag expand, one end of the fan blade is fixedly connected with the annular air bag, a through slot is arranged on the shell and the fan blade can pass through the through slot, the other end of the fan blade extends outward through the through slot, a serrated groove is arranged on the edge of the fan blade, a contraction slot is arranged on the shell on both sides of the through slot, a tapered stopper that can be clamped into the serrated groove to fix the fan blade is arranged in the contraction slot and can be retracted into the contraction slot.

[0004] The sizes of the various components in the above-mentioned scheme are much smaller than those of the circuit board in the switching power supply, which is difficult to manufacture. In addition, the sliding connection of the fan blade and the shell is easy to cause the fan blade to jam and cause the motor to heat up. In addition, the driving component of the annular air bag is vinegar. Since the annular air bag is a component subjected to rapid friction, it has the risk of being damaged. Once damaged, the vinegar will splash out and be pushed by the rotation of the fan blade, which is easy to cause the circuit board to be attached with vinegar and cause the problem of circuit board short circuit damage.

[0005] Therefore, we need a switching power supply that can reduce friction and quickly dissipate heat when the working environment of the circuit board exceeds the rated temperature. SUMMARY

[0006] The technical problem to be solved by the application is to provide a high-frequency switching power supply with high-temperature monitoring feedback, which can quickly dissipate heat when the temperature of the circuit board exceeds the rated temperature, while reducing the interference and heating caused by friction and the damage of parts.

[0007] The high-frequency switching power supply with high-temperature monitoring feedback comprises an outer shell, a circuit board, a base, a fan, and a guide plate located in the outer shell.

[0008] The guide plate and the circuit board are spaced apart to form an air supply channel, the air supply channel covers the heat emitting surface of the circuit board; cold air generated by the fan is introduced into the air supply channel in real time, and the air volume and air pressure of the cold air are always constant;

[0009] A plurality of turbulence synapses are arranged in the cold air flow direction in the air supply channel, the turbulence synapse comprises a deformation member and a heated member; the deformation member is made of flexible or elastic material and has an expansion deformation amount; the heated member absorbs heat radiation of the circuit board and drives the expansion deformation of the deformation member, and the necessary condition for the driving includes that the absorption temperature of the heated member reaches the upper limit of the set temperature;

[0010] The deformation of the deformation member changes the caliber of the air supply channel.

[0011] As a further improvement of the application, the guide plate is located on the upper side of the circuit board, the fan is located on the upper side of the guide plate, and the turbulence synapse is fixedly arranged on the lower end surface of the guide plate.

[0012] As a further improvement of the application, the guide plate is located on the lower side of the circuit board, the fan is located on the lower side of the guide plate, and the turbulence synapse is fixedly arranged on the upper end surface of the guide plate.

[0013] As a further improvement of the application, the deformation member is a hollow capsule made of elastic film; the capsule is filled with vinegar, and the vinegar is the heated member; the capsule is fixedly arranged on the end surface of the guide plate of the air supply channel; and the deformation direction of the capsule is close to or away from the circuit board side of the air supply channel.

[0014] As a further improvement of the application, the deformation member is a hollow capsule made of elastic film, and the capsule is filled with water; the capsule is fixedly arranged on the upper end surface of the guide plate of the air supply channel; a magnet is fixedly arranged on the outer end of the lower side of the capsule film, and the magnet is the heated member; a magnet conductor is fixedly arranged on the upper end surface of the guide plate where the capsule is located; and the magnet and the magnet conductor are magnetically attracted.

[0015] As a further improvement of the application, a cooling strip is arranged between the two adjacent turbulence synapses, and the specific heat capacity of the cooling strip is higher than that of the turbulence synapse.

[0016] As a further improvement of the application, the surface of the turbulence synapse is spherical after the expansion deformation.

[0017] As a further improvement of the application, the guide plate and the turbulence synapse are made of the same layer of flexible film, the flexible film forms a closed fluid cavity, the fluid cavity is filled with fluid, and a magnet is arranged between the two adjacent turbulence synapses; the magnet is fixedly arranged on the upper end of the guide plate; the magnet conductor is arranged on the lower end of the guide plate; and the magnet and the magnet conductor are magnetically repelled.

[0018] As a further improvement of the application, a fireproof coating is coated on the outer periphery of the magnet, and the specific heat capacity of the fireproof coating is higher than that of the turbulence synapse.

[0019] Compared with the prior art, the application has the beneficial effects that:

[0020] The application sets the flow guide plate, and the flow guide plate and the circuit board form an air supply channel.

[0021] The application sets the flow guide plate, and the flow guide plate and the circuit board form an air supply channel.

[0022] The application sets the flow guide plate, and the flow guide plate and the circuit board form an air supply channel.

[0023] The application does not need to set electronic devices (such as controllers, sensors, etc.), has low manufacturing cost, and is conducive to industrialization.

[0024] The flow guide plate and the flow guide plate can be arranged on the upper side of the circuit board or the lower side of the circuit board, have various setting forms, and are conducive to the selection of purchasers. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a three-dimensional structure schematic view of the specific embodiment one of the application.

[0026] Figure 2 It is a plane structure schematic view of the air supply channel of the specific embodiment one of the application.

[0027] Figure 3The air supply fluctuation schematic diagram when the turbulence synapse of the specific embodiment one of the present application is not working;

[0028] Figure 4 The air supply fluctuation schematic diagram when the turbulence synapse of the specific embodiment one of the present application is working;

[0029] Figure 5 The plane structure schematic diagram at the air supply channel of the specific embodiment two of the present application;

[0030] Figure 6 The plane structure schematic diagram at the turbulence synapse of the specific embodiment three of the present application;

[0031] Figure 7 The plane structure schematic diagram at the air supply channel of the specific embodiment four of the present application;

[0032] Figure 8 The action schematic diagram of the turbulence synapse and the turbulence synapse when the turbulence synapse of the specific embodiment four of the present application is working;

[0033] Figure 9 The three-dimensional exploded view of the base, the flow guide plate and the circuit board connecting part of the specific embodiment five of the present application;

[0034] Figure 10 The three-dimensional structure schematic diagram of the self-adjusting sleeve of the specific embodiment five of the present application.

[0035] Explanation of the figure mark:

[0036] The shell 1, the circuit board 2, the base 3, the fan 4, the flow guide plate 5, the turbulence synapse 51, the cooling strip 52, the magnet 53, the magnetizer 54, the self-adjusting sleeve 6, the wall strip 61, the connecting strip 62, the connecting point 63, the screw 7. DETAILED DESCRIPTION

[0037] Specific embodiment one: please refer to Figures 1-4 A high-frequency switching power supply with high-temperature monitoring feedback, comprising a shell 1, a circuit board 2, a base 3, a fan 4 and a flow guide plate 5;

[0038] The circuit board 2, the fan 4 and the flow guide plate are all arranged in the cavity formed by the shell 1 and the base 3; wherein the shell 1 is netted, which is beneficial to air flow and heat dissipation.

[0039] The main heat generating part of the switching power supply is the circuit board 2, and the main heat dissipation object of the present embodiment is the circuit board 2; the safe working environment temperature of the circuit board 2 is 40-60℃; since the switching power supply often works in high-temperature areas, and the switching power supply often works under overload, the circuit board 2 often works in an environment with a temperature higher than 60℃.

[0040] In this embodiment, the fan 4 is arranged on the upper side of the circuit board 2. Since the fan is a vulnerable part relative to the circuit board, the maintenance frequency is greater than that of the circuit board 2, so the arrangement order of the switching power supply from top to bottom is: the shell 1, the fan 4, the flow guide plate 5, the circuit board 2, and the base 3. Such arrangement facilitates the installation and maintenance of the fan 4.

[0041] An air supply port is formed in the upper end of the middle of the flow guide plate 5, and the air supply port is aligned with the fan 4. The flow guide plate 5 is arranged in a spaced manner relative to the circuit board 2, and an air supply channel is formed between the flow guide plate 5 and the circuit board 2. The air supply channel covers the heat-emitting surface of the circuit board 2 (i.e., the upper end surface of the circuit board 2). The air inlet of the air supply channel is the air supply port, and the air outlet of the air supply channel is located at the left and right ends of the shell 1, which is an opening formed by the flow guide plate 5, the circuit board 2, and the shell 1. Since the fan 4 is far away from the circuit board 2, the fan 4 can transport cool air with a relatively low temperature from the outside into the air supply channel through the air supply port after rotating. The cool air is continuously input. In order to reduce the loss of electric energy caused by the control of the fan 4, the fan 4 is set to rotate at a constant speed in this embodiment. Therefore, the cool air is continuously, quantitatively, and constant-pressure input into the air supply channel. After the cool air enters the air supply channel, it flows to the left and right sides. The cool air flowing in the air supply channel carries away the heat radiated by the circuit board 2, thereby reducing the working environment of the circuit board 2.

[0042] The fixed caliber of the air supply channel in a free state is uniform. Since the structure of the air supply channel on the left and right sides of the air supply port is consistent, only the structure at the air supply channel on the left side of the air supply port is disclosed in this embodiment.

[0043] A plurality of turbulence synapses 51 are fixedly arranged at the flow guide plate 5 of the air supply channel, i.e., the lower end surface of the flow guide plate 5. The plurality of turbulence synapses 51 are arranged in a spaced manner. From a theoretical point of view, the spacing between each two adjacent turbulence synapses 51 is set in a different way to achieve better heat dissipation effect. However, in order to reduce the manufacturing cost, the spacing between each two adjacent turbulence synapses 51 is the same in this embodiment.

[0044] The turbulence synapse 51 is composed of an elastic film covering the lower end of the flow guide plate 5, and the elastic film and the flow guide plate 5 form a cavity filled with vinegar; the boiling point of the vinegar is 40-60℃, which is the same as the safe working temperature of the circuit board 2. In a free state, i.e. when the working temperature of the circuit board 2 is lower than 60℃, the heat radiation temperature of the vinegar is lower than 60℃, the vinegar does not boil and vaporize, and the elastic film does not deform. Once the working temperature of the circuit board 2 reaches or exceeds 60℃, the vinegar in the elastic film vaporizes into gas, the elastic film expands, the surface of the elastic film remains spherical, and the diameter of the sphere continues to increase; the elastic film expands towards the circuit board 2, and due to the material limitation of the elastic film, in this embodiment, the maximum deformation of the elastic film is less than the distance from the upper end of the circuit board 2 in a free state, i.e. the elastic film does not expand to abut against the circuit board 2 to close the air supply channel. Due to the expansion of the elastic film, the diameter of the air supply channel at this position changes from small to large, and when the cold air passes through this position, the flow direction changes, and the original laminar flow changes into turbulent flow or the degree of turbulence increases. The greater the degree of turbulence, the higher the heat transfer efficiency, so the cold air absorbs more heat when passing through this position, helping to dissipate heat from the circuit board 2.

[0045] In addition, due to the narrowing of the gas passage, the cold air passing through the expanded elastic film emits a sharp sound, which helps the user to know that the working temperature of the circuit board 2 is too high and needs to stop using or use other physical cooling means to help the circuit board 2 cool down.

[0046] Specific embodiment two: based on the specific embodiment one, please refer to Figure 5 A high-temperature monitoring feedback high-frequency switching power supply, a cooling strip 52 is fixedly arranged at the lower end surface of the flow guide plate 5 between two adjacent turbulence synapses 51, and the surface of the cooling strip 52 is coated with fireproof paint, so that the specific heat capacity of the cooling strip 52 is higher than that of the elastic film. The higher the specific heat capacity value, the lower and slower the temperature rise under the same temperature environment condition, so the cold air (which has absorbed part of the heat of the circuit board 2) passing through the elastic film rises upward after passing through the turbulence synapse 51 with a low horizontal height, and the gas temperature decreases when meeting the cooling strip 52 with a relatively low surface temperature, so that the gas has a downward (close to the circuit board 2) movement tendency, which facilitates the gas to re-contact the circuit board 2 and carry away more heat, and at the same time, the gas flow direction angle changes, which is more conducive to increasing the turbulence degree of the gas flow and improving the heat dissipation efficiency.

[0047] Specific embodiment three: based on the specific embodiment one or two, please refer to Figure 6The high-frequency switching power supply with high-temperature monitoring feedback, the lower end of the elastic film is fixedly connected with a magnet 53, and the upper end of a guide plate 5 corresponding to the magnet 53 is fixedly provided with an iron block, and the magnet 53 always keeps being attracted to the iron block; in a free state, the elastic film is pulled by the magnet 53, and the pulling force of the elastic film on the magnet 53 is reduced due to the magnetic attraction force and gravity; in this state, the elastic film is in a force balance state and is just at the edge of deformation; when the circuit board 2 works and generates heat, the magnet 53 absorbs heat quickly due to the material, and the higher the temperature of the magnet is, the weaker the magnetism is; in this state, the pulling force of the elastic film on the magnet 53 increases with the increase of the heating temperature of the circuit board 2, the elastic film generates downward deformation, and the diameter of the air supply channel at the position is reduced after the elastic film deforms, so that the turbulence degree of the cold air is increased, and the heat is effectively dissipated.

[0048] The advantage of the arrangement is that the force of the elastic film changes according to the change of the heating temperature of the circuit board 2, and the elastic film is always in a stretched state when the circuit board 2 works, and the difference is that the higher the heating temperature of the circuit board 2 is, the greater the stretching degree is, so that the circuit board 2 in each temperature state is subjected to the heat dissipation addition of the turbulence synapse 51, the situation that the heating temperature of the circuit board 2 is continuously superimposed is reduced, and the overheat of the circuit board 2 is effectively prevented in the initial state.

[0049] In the arrangement, the elastic film can be provided with a fluid or not; the fluid can be vinegar or other liquid or gas. In order to achieve the effect that the elastic film is more flexible, the scheme in the first embodiment is used in the embodiment, and the elastic film is provided with vinegar.

[0050] Specific embodiment four: different from the first embodiment, please refer to Figures 7-8 The high-frequency switching power supply with high-temperature monitoring feedback, the arrangement order of the switching power supply from top to bottom is: the shell 1, the circuit board 2, the guide plate 5, the fan 4 and the base 3; the arrangement effectively avoids the problem that the turbulence synapse 51 is damaged, the liquid flows to the circuit board 2, and the circuit board 2 is damaged due to short circuit.

[0051] In the embodiment, the guide plate 5 is formed of a flexible film, the flexible film forms a closed chamber, the chamber is filled with a fluid, and the flexible film is expanded to be plate-shaped; a plurality of membrane bodies on the upper end of the guide plate 5 are wrinkle membranes, that is, in a free state, the wrinkle membranes are flush with other membrane parts to form the upper wall of the guide plate 5, in the case that the internal pressure of the guide plate 5 increases, the wrinkles of the wrinkle membranes are reduced, and the wrinkle membranes are protruded to become synapses, that is, the turbulence synapses 51; in addition, the wrinkle membranes have the self-return feature due to the wrinkles, and the wrinkle membranes are returned to be flush with other membrane parts after the internal pressure of the guide plate 5 is restored.

[0052] The first magnet is fixed on the outer surface of the membrane between every two adjacent pleated membranes; the second magnet is fixed on the outer surface of the membrane under the corresponding end of the flow guide plate 5; the first magnet is subjected to the gravity and repulsive force, and the membrane where the first magnet is located is in force balance; when the first magnet is subjected to the temperature generated by the circuit board 2, the magnetism is weakened, and the first magnet has a downward movement tendency; when the first magnet moves downward and presses the membrane of the flow guide plate 5, the internal pressure of the flow guide plate 5 becomes larger, forcing the fluid to flow to the pleated membrane part, and the pleated membrane protrudes upward to form the turbulence synapse 51, thereby improving the heat dissipation of the flowing gas in the air supply channel to the circuit board 2.

[0053] In the embodiment, the fluid can be vinegar, other liquids, or gas.

[0054] The pleated membrane can be replaced by an elastic membrane.

[0055] The outer surface of the first magnet is coated with the same fireproof paint as in Embodiment Two.

[0056] Embodiment Five: Based on any one of Embodiments One to Four, please refer to Figures 9-10 A high-temperature monitoring feedback high-frequency switching power supply, the circuit board 2 and the base 3 are fixedly connected through the screw 7; the screw 7 penetrates the flow guide plate 5; the outer side of the screw 7 is sleeved with the self-adjusting sleeve 6; the circuit board 2, the flow guide plate 5 and the base 3 are all provided with coaxial through holes, and the through holes are not provided with threads; the screw 7 is threadedly connected with the nut on the outer side of the base 3; the self-adjusting sleeve 6 is arranged in the through hole, and the two ends of the self-adjusting sleeve 6 are fixedly connected with the inner wall of the through hole of the circuit board 2 and the inner wall of the through hole of the base 3 respectively.

[0057] The self-adjusting sleeve 6 comprises wall strips 61 and connecting strips 62;

[0058] The number of the wall strips 61 is four, and the four wall strips 61 are circumferentially and uniformly arranged;

[0059] The number of the connecting strips 62 is four, and each connecting strip 62 is located between two adjacent wall strips 61 and is fixedly connected with the wall strips 61;

[0060] The material of the connecting strip 62 is the same as that of the turbulence synapse 51 in Embodiment One, and is made of an elastic membrane, and the connecting strip 62 is filled with vinegar; the connecting strip 62 is in communication with the flow guide plate 5; the vinegar in the connecting strip 62 is provided by the vinegar in the flow guide plate 5;

[0061] The length of the connecting strip 62 is the same as that of the wall strip 61, the outer periphery of the two ends of the connecting strip 62 is protruded outward to form a connecting point 63, the connecting point 63 is the connecting part of the self-adjusting sleeve 6 and the inner wall of the through hole; the diameter of the circle formed by the outer ends of the four connecting points 63 is larger than that of the circle formed by the outer periphery of the four wall strips 61, that is, the outer ends of the connecting points 63 are located outside the outer periphery of the wall strips 61, the connecting points 63 are also filled with vinegar, and when the connecting points 63 are fixedly connected with the inner wall of the through hole, the wall strips 61 always keep a gap with the inner wall of the through hole.

[0062] After the screw 7 is arranged in the self-adjusting sleeve 6, the outer periphery of the screw 7 abuts against the inner wall of the wall strip 61, and at room temperature, the diameter of the circle composed of the inner wall of the wall strip 61 is equal to the diameter of the outer periphery of the screw 7.

[0063] In the prior art, when the circuit board 2 works and generates heat, the heat is transmitted to the screw 7, the screw 7 expands, and at the same time, the inner hole of the circuit board 2 also shrinks due to the heat, and under the superposition of the two, the connection between the screw 7 and the circuit board 2 becomes excessive interference connection, and under the long-term temperature changes, stress damage occurs at the connection between the screw 7 and the circuit board 2, resulting in double damage of the circuit board 2 and the screw 7.

[0064] In the embodiment, the screw 7 is located in the self-adjusting sleeve 6, after the self-adjusting sleeve 6 is heated, the vinegar vaporizes, which causes the connecting strip 62 to expand, and then the wall strip 61 is expanded, the diameter of the circle composed of the inner wall of the wall strip 61 is expanded, the stress of the screw 7 under high temperature is reduced, and the service life of the screw 7 is prolonged; after the temperature decreases, the connecting strip 62 automatically retracts, the diameter of the circle composed of the inner wall of the wall strip 61 is reduced and recovered, the screw 7 is still pressed by the wall strip 61, and the screw 7 can still be stably coated.

[0065] In addition, the through hole shrinks after being heated, but since the connecting point connected with the through hole is flexible, the wall strip 61 is not damaged;

[0066] The outer diameter of the connecting strip 62 is smaller than that of the wall strip 61, so that a groove is formed between the wall strips 61, when the wind driven by the fan 4 passes through the self-adjusting sleeve 6, the wind flows into the connecting point 63 through the groove between the wall strips 61, the temperature at the connecting point 63 and the through hole is reduced, the thermal deformation of the circuit board 2 is slowed down, and the service life of the circuit board 2 is prolonged.

Claims

1. A high-frequency switching power supply with high-temperature monitoring feedback, comprising a shell (1), a circuit board (2), a base (3), and a fan (4), characterized in that: It also includes a flow deflector (5) located inside the housing (1); The air guide plate (5) and the circuit board (2) are spaced apart to form an air supply channel, which covers the heating surface of the circuit board (2); cold air generated by the fan (4) is introduced into the air supply channel in real time, and the air volume and air pressure of the cold air are always constant. Multiple spaced turbulence synapses (51) are provided in the direction of cold air flow in the air supply channel. The turbulence synapses (51) include deformable parts and heated parts. The deformable parts are made of flexible or elastic materials and have an expansion deformation amount. The heated parts absorb the heat radiation of the circuit board (2). The heated parts drive the expansion deformation of the deformable parts. The necessary conditions for driving include the heated parts absorbing the temperature reaching the upper limit of the set temperature. The deformation of the deformable part changes the diameter of the air supply duct it is located in; The guide plate (5) is located on the upper side of the circuit board (2), the fan (4) is located on the upper side of the guide plate (5), and the turbulence protrusion (51) is fixedly set on the lower end face of the guide plate (5); The deformable part is a hollow bladder made of an elastic membrane; the bladder is filled with vinegar, which is a heated part; the bladder is fixedly set on the end face of the guide plate (5) of the air supply channel; the deformation direction of the bladder is closer to or farther away from the circuit board (2) side of the air supply channel. A cooling strip (52) is provided between two adjacent turbulence synapses (51), and the specific heat capacity of the cooling strip (52) is higher than that of the turbulence synapse (51); After the turbulent synapse (51) expands and deforms, its surface becomes spherical.

2. The high frequency switching power supply with high temperature monitoring feedback according to claim 1, characterized in that: The deformable part is a hollow bladder made of an elastic membrane and filled with water. The bladder is fixedly installed on the upper end face of the air supply channel guide plate (5). A magnet (53) is fixedly installed on the lower outer end of the bladder membrane. The magnet (53) is a heated part. A magnetic conductor (54) is fixedly installed on the upper end face of the air supply channel guide plate (5) where the bladder is located. The magnet (53) and the magnetic conductor (54) maintain magnetic attraction.

3. The high frequency switching power supply with high temperature monitoring feedback according to claim 1, characterized in that: The guide plate (5) and the turbulence synapse (51) are made of the same flexible membrane. The flexible membrane forms a closed fluid cavity, which is filled with fluid. A magnet (53) is provided between two adjacent turbulence synapses (51). The magnet (53) is fixedly set at the upper end of the guide plate (5). The magnetic conductor (54) is located at the lower end of the guide plate (5). The magnet (53) and the magnetic conductor (54) maintain magnetic repulsion.

4. The high frequency switching power supply with high temperature monitoring feedback according to claim 3, characterized in that: The magnet (53) is coated with a fireproof coating on its outer periphery. The specific heat capacity of the fireproof coating is higher than that of the turbulent synapse (51).

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