Voltage transformation and rectification device for high-frequency switching power supply

Abstract

The invention discloses a transformation rectifying device for a high-frequency switching power supply, and relates to the technical field of transformation rectifiers, the transformation rectifying device comprises supporting legs, a rear cover, a shell, an oil storage tank, a support, an oil inlet pipe, a second groove and a circulating cooling unit, and the circulating cooling unit comprises a first cooling pipe assembly and a second cooling pipe; the first cooling pipe assembly is evenly provided with a plurality of flexible sections and connecting sections in the length direction, the flexible sections are made of silicon rubber materials and expand in the radial direction after being heated, and the heat dissipation contact area between the clamping plates and the second grooves is increased. The flexible section is provided with two layers including an inner layer and an outer layer, and a main flow channel and an auxiliary flow channel are formed in the flexible section and are used for self-adapting and meeting the heat dissipation requirements of different positions and different heating degrees in the transformation rectifying equipment; the technical effects that the adaptability of the cooling pipe is improved, the heat dissipation requirement of local overheating is met, the application range is expanded, the heat buffering capacity is achieved, the heat dissipation efficiency is improved, and the service life of the transformation rectifying device is prolonged are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of voltage rectifier, and particularly relates to a voltage rectifier device for high-frequency switching power supply. BACKGROUND

[0002] The voltage rectifier device is a core component in a switching power supply system, which is composed of a high-frequency transformer and a rectifier, and mainly converts direct current into high-frequency alternating current through a front-end circuit, then performs voltage conversion and electrical isolation through the high-frequency transformer, and finally converts back to smooth direct current through a high-speed rectifier, and the core principle is to realize the miniaturization and high efficiency of the power supply by using high-frequency technology.

[0003] However, the high-frequency and large-current characteristics of the voltage rectifier device of the high-power high-frequency switching power supply during operation will cause significant heat loss, and the excessive temperature rise generated thereby will endanger the safety of the internal circuit and components, and further affect the reliable operation of the power supply as a whole.

[0004] At present, the heat dissipation of the voltage rectifier device is mainly modularized assembled by independently separating the heat dissipation system from the voltage rectifier, and the surrounding of the voltage rectifier is cooled through an independent oil cooling cycle. However, in actual use, the traditional cooling pipe is of a rigid structure and cannot adapt to the change of local heat sources, which is easy to cause heat dissipation dead angles or overheating. For example, in a data center or a power substation, the equipment is easy to produce local overheating during long-term high-power operation, and the existing cooling pipe cannot adapt to irregular heat source distribution, thereby causing hot spot problems, even damaging the internal components of the voltage rectifier device and reducing the service life. In addition, the system cannot flexibly respond to transient temperature rise and lacks heat buffering capacity, further reducing the heat dissipation effect. SUMMARY

[0005] The present application provides a voltage rectifier device for high-frequency switching power supply, which solves the technical problems of poor adaptability of the cooling pipe, inability to meet the heat dissipation demand of local overheating, reduced application range, lack of heat buffering capacity, limited heat dissipation efficiency and reduced service life of the voltage rectifier device in the prior art, and achieves the technical effects of improved adaptability of the cooling pipe, meeting the heat dissipation demand of local overheating, expanded application range, having heat buffering capacity, improved heat dissipation efficiency and improved service life of the voltage rectifier device.

[0006] The present application provides a voltage rectifier device for high-frequency switching power supply, which solves the technical problems of poor adaptability of the cooling pipe, inability to meet the heat dissipation demand of local overheating, reduced application range, lack of heat buffering capacity, limited heat dissipation efficiency and reduced service life of the voltage rectifier device in the prior art, and achieves the technical effects of improved adaptability of the cooling pipe, meeting the heat dissipation demand of local overheating, expanded application range, having heat buffering capacity, improved heat dissipation efficiency and improved service life of the voltage rectifier device. The circulating cooling unit includes a first cooling pipe assembly and a second cooling pipe; the first cooling pipe assembly is uniformly provided with a plurality of flexible segments and connecting segments along its length direction, the flexible segments are made of silicone rubber, which expands radially after being heated to increase the heat dissipation contact area with the clamping plate and the second groove; The flexible section has two layers, including an inner layer and an outer layer, and forms a main flow channel and a secondary flow channel inside it to adapt to and meet the heat dissipation requirements of different locations and different heat generation levels in the transformer rectifier equipment.

[0007] Furthermore, the transformer-rectifier device includes an input filter, an input rectifier, an output coil, an input coil, an electromagnetic chip, an output rectifier filter, and a circuit protector structure. It is used to convert high-voltage AC power into high-voltage DC power through the three-phase windings in the transformer-rectifier device, thereby converting high-voltage AC power into high-frequency AC power. While changing the frequency of the AC power, it also adjusts the output voltage so that the output voltage is not affected by the load and the input power supply voltage, thus realizing the transformer rectification of the high-frequency switching power supply.

[0008] Furthermore, the first cooling pipe assembly includes two types of channels, namely flexible sections and connecting sections; the flexible sections and connecting sections are connected end to end, and multiple sets of flexible sections and connecting sections are interconnected to form the first cooling pipe assembly.

[0009] Furthermore, the opposing surfaces of the housing, clamping plate, and first cooling pipe assembly are all configured as flexible layers to accommodate the deformation of the flexible segment.

[0010] Furthermore, the flexible segment is provided with two layers, including an inner layer and an outer layer; The inner layer is located inside the first cooling pipe assembly and forms a main flow channel with the connecting section to transport some mineral oil and dominate heat dissipation; the outer layer is located outside the first cooling pipe assembly and forms a secondary flow channel with the inner layer to assist heat dissipation.

[0011] Furthermore, the inner layer has an inlet and an outlet at both ends along the flow direction of the mineral oil inside the oil storage tank inside the first cooling pipe assembly. When the inner layer detects that the temperature has reached the threshold, the inner layer expands and deforms, automatically opening the inlet to enter the secondary flow channel, so that part of the mineral oil flowing into the main flow channel flows from the inlet to the secondary flow channel.

[0012] Furthermore, a diaphragm with a spiral structure is fixed inside the secondary flow channel to form a spiral secondary flow channel with the secondary flow channel, which is used to extend the flow path and residence time of mineral oil when passing through high-heat parts.

[0013] Furthermore, the diaphragm has a capsule structure and contains a medium inside. The medium is a composite phase change material, which is a mixture of paraffin, graphene and expanded graphite. When the instantaneous temperature increases, the medium inside the diaphragm quickly absorbs heat and melts, preventing instantaneous temperature rise, smoothing temperature fluctuations, realizing dynamic heat capacity regulation, and enhancing heat buffering capacity.

[0014] Furthermore, the connecting segment is a rigid structure and an elastic membrane is fixed to the surface opposite to the second groove; Multiple airbags are uniformly embedded in the clamp along the length of the second groove. The airbags are positioned opposite the elastic membrane and are connected to an external air pump through air channels.

[0015] Furthermore, a temperature sensor is embedded in the outer layer opposite to the transformer rectifier to monitor the local temperature and transmit the temperature information to the external control system. The external control system then sends a command to the air pump based on the data measured by the temperature sensor, adjusts the inflation state of the airbag at the corresponding position, squeezes the elastic membrane, and locally restricts the flow rate through the connecting section, thereby prolonging the residence time of mineral oil in the adjacent flexible section.

[0016] One or more technical solutions provided in this application have at least the following technical effects or advantages: The flexible section, made of silicone rubber, expands radially upon heating, working in conjunction with the clamping plate and the second groove to increase the heat dissipation contact area. A dual-layer flow channel (main flow channel and secondary flow channel) and a temperature-triggered diversion mechanism adapt to localized heating needs. The diaphragm, containing composite phase change material, rapidly absorbs heat and melts, providing thermal buffering. Intelligent control via temperature sensors, air bladders, and elastic membranes dynamically limits flow and extends mineral oil residence time. This effectively solves the technical problems of poor adaptability of cooling pipes, inability to meet localized overheating heat dissipation needs, reduced applicability, lack of thermal buffering capacity, limited heat dissipation efficiency, and reduced lifespan of transformer-rectifier devices in existing technologies. It achieves improved cooling pipe adaptability, meets localized overheating heat dissipation needs, expands the applicability range, provides thermal buffering capacity, improves heat dissipation efficiency, and extends the lifespan of transformer-rectifier devices. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a transformer and rectifier device for a high-frequency switching power supply according to the present invention.

[0018] Figure 2 This is a right half-sectional view of a transformer rectifier device for a high-frequency switching power supply according to the present invention.

[0019] Figure 3 This invention relates to a transformer and rectifier device for a high-frequency switching power supply. Figure 2 A magnified view of a portion of point A in the middle.

[0020] Figure 4 This is a schematic diagram of the top cover and clamping plate of a transformer rectifier for a high-frequency switching power supply according to the present invention.

[0021] Figure 5 This is a connection structure diagram of the first cooling pipe assembly and the second cooling pipe of a transformer rectifier device for a high-frequency switching power supply according to the present invention.

[0022] Figure 6 This is a partial structural cross-sectional view of the flexible section of a transformer rectifier for a high-frequency switching power supply according to the present invention.

[0023] Figure 7 This is a longitudinal full-section schematic diagram of a portion of the first cooling pipe assembly of a transformer rectifier device for a high-frequency switching power supply according to the present invention.

[0024] Figure 8 This is a longitudinal full sectional view of the flexible section of a transformer rectifier for a high-frequency switching power supply according to the present invention.

[0025] Figure 9 This invention relates to a transformer and rectifier device for a high-frequency switching power supply. Figure 8 A magnified view of a portion of point B in the middle.

[0026] In the diagram: 100, support leg; 101, rear cover; 110, housing; 111, top cover; 120, baffle plate; 130, fin; 140, oil tank; 141, oil inlet pipe; 142, oil outlet pipe; 150, clamping plate; 151, second groove; 152, airbag; 160, temperature sensor; 200, first cooling pipe assembly; 201, second cooling pipe; 202, inlet; 203, outlet; 210, flexible section; 211, inner layer; 212, outer layer; 220, connecting section; 221, elastic membrane; 230, main flow channel; 240, secondary flow channel; 250, diaphragm; 260, medium; 300, transformer rectifier; 310, input filter; 320, input rectifier; 330, electromagnetic chip; 340, output rectifier filter; 350, circuit protector. Detailed Implementation

[0027] To facilitate understanding of the present invention, a more complete description of this application will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of the present invention.

[0028] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] Please see Figure 1 This is a schematic diagram of the overall structure of a transformer rectifier for a high-frequency switching power supply according to the present invention. The transformer rectifier for a high-frequency switching power supply of this application increases the heat dissipation contact area by using a flexible section 210 made of silicone rubber that expands radially upon heating, cooperating with the clamping plate 150 and the second groove 151. It adapts to localized heat generation needs through a double-layer flow channel (main flow channel 230 and secondary flow channel 240) and a temperature-triggered flow diversion mechanism. It provides thermal buffering by rapidly absorbing heat through a diaphragm 250 containing composite phase change material. Through intelligent regulation of the temperature sensor 160, airbag 152, and elastic membrane 221, it dynamically limits the flow rate and extends the mineral oil residence time. This achieves the technical effects of improved cooling pipe adaptability, meeting the heat dissipation needs of localized overheating, expanding the applicable range, providing thermal buffering capacity, improving heat dissipation efficiency, and extending the service life of the transformer rectifier.

[0031] Example 1: As Figures 1 to 9 As shown, this application discloses a transformer and rectifier device for a high-frequency switching power supply, including a support 100, a rear cover 101, a transformer and rectifier device 300, a housing 110, a first groove, a top cover 111, a baffle 120, fins 130, an oil tank 140, a bracket, an oil inlet pipe 141, an oil outlet pipe 142, a clamping plate 150, a sealing deflector, a deflector, a second groove 151, and a circulating cooling unit; The circulating cooling unit includes a first cooling pipe assembly 200 and a second cooling pipe 201; the first cooling pipe assembly 200 is uniformly provided with a plurality of flexible segments 210 and connecting segments 220 along its length direction. The flexible segments 210 are made of silicone rubber and expand radially after being heated, increasing the heat dissipation contact area with the clamping plate 150 and the second groove 151. The flexible section 210 has two layers, including an inner layer 211 and an outer layer 212, and forms a main flow channel 230 and a secondary flow channel 240 inside it, which are used to adapt to and meet the heat dissipation requirements of different positions and different heat generation levels in the transformer rectifier device 300.

[0032] like Figure 2As shown, the transformer-rectifier device 300 includes an input filter 310, an input rectifier 320, an output coil, an input coil, an electromagnetic chip 330, an output rectifier filter 340, and a circuit protector 350. It is used to convert high-voltage AC power into high-voltage DC power by the input rectifier 320 through the three-phase windings in the transformer-rectifier device 300, and to adjust the output voltage while changing the frequency of the AC power, so that the output voltage is not affected by the load and the input power supply voltage, thereby realizing the transformer rectification of the high-frequency switching power supply.

[0033] Considering that components such as the electromagnetic chip 330 are prone to forming local hot spots when the transformer rectifier operates at full load for a long time, this application optimizes the material of the first cooling pipe assembly 200 by setting multiple sets of flexible segments 210. When the silicone rubber material of the flexible segment 210 is heated, its molecular chain segment movement intensifies, the inter-chain distance expands and radial expansion occurs, which significantly increases the contact point density between the cooling pipe surface and the clamp plate 150 and the second groove 151, realizing the transformation from point contact to surface contact, enabling the heat dissipation interface to achieve dynamic self-sealing, reducing the interface thermal resistance. Through the coupling effect of material expansion and cooling flow field, the increased contact area accelerates heat dissipation, while the increased flow channel deformation prolongs the mineral oil residence time. Furthermore, setting multiple flexible segments 210 can provide targeted enhanced heat dissipation for localized heat-generating parts of the transformer rectifier, improving the heat dissipation effect and reducing the probability of device damage.

[0034] like Figures 6 to 9 As shown, the first cooling pipe assembly 200 includes two types of channels, namely a flexible section 210 and a connecting section 220; the flexible section 210 and the connecting section 220 are connected end to end, and multiple sets of flexible sections 210 and connecting sections 220 are interconnected to form the first cooling pipe assembly 200.

[0035] The opposing surfaces of the housing 110, the clamping plate 150, and the first cooling pipe assembly 200 are all configured as flexible layers to accommodate the deformation of the flexible segment 210.

[0036] like Figures 6 to 9 As shown, the flexible segment 210 is provided with two layers, including an inner layer 211 and an outer layer 212; The inner layer 211 is located inside the first cooling pipe assembly 200 and forms a main flow channel 230 with the connecting section 220, which is used to transport part of the mineral oil and mainly dissipate heat; the outer layer 212 is located outside the first cooling pipe assembly 200 and forms a secondary flow channel 240 with the inner layer 211, which is used to assist in heat dissipation.

[0037] The inner layer 211 has an inlet 202 and an outlet 203 at both ends along the flow direction of the mineral oil inside the oil storage tank 140 inside the first cooling pipe assembly 200. When the inner layer 211 detects that the temperature has reached the threshold, the inner layer 211 expands and deforms, automatically opening the inlet 202 into the secondary flow channel 240, so that part of the mineral oil flowing into the main flow channel 230 flows from the inlet 202 into the secondary flow channel 240.

[0038] like Figure 8 and Figure 9 As shown, a spiral diaphragm 250 is fixed inside the secondary flow channel 240 and forms a spiral secondary flow channel 240 with the secondary flow channel 240, which is used to extend the flow path and residence time of mineral oil when passing through high-heat parts.

[0039] This application sets the flexible section 210 into a double-layer structure, including an inner layer 211 forming the main flow channel 230 and an outer layer 212 forming the secondary flow channel 240. When the inner layer 211 expands below the temperature threshold, it automatically opens the inlet 202, allowing mineral oil to be diverted from the main flow channel 230 to the secondary flow channel 240. Based on the thermosensitive nature of silicone rubber, deformation does not require external power, achieving passive intelligent control. At the same time, the secondary flow channel 240 is designed as a spiral and the flow path is extended through the diaphragm 250. Under normal load, the mineral oil mainly flows through the main flow channel 230; at high temperatures, the expansion of the inner layer 211 triggers diversion. By optimizing the flow distribution through the layered structure of the flow channel, this device can rationally allocate cooling resources according to the degree of local heat generation, avoiding insufficient heat dissipation in high-temperature areas. The use of a double-layer flow channel and temperature-triggered diversion solves the problem of local overheating that cannot be targeted for heat dissipation, and avoids component damage caused by hot spot accumulation in power substations.

[0040] like Figures 7 to 9 As shown, the diaphragm 250 has a capsule structure and contains a medium 260 inside. The medium 260 is a composite phase change material, which is a mixture of paraffin, graphene and expanded graphite. When the instantaneous temperature increases, the medium 260 inside the diaphragm 250 quickly absorbs heat and melts, preventing instantaneous temperature rise, smoothing temperature fluctuations, realizing dynamic heat capacity regulation, and enhancing heat buffering capacity.

[0041] Considering that instantaneous temperature rises (such as the start-up and shutdown of a switching power supply) can cause temperature spikes, electronic components may be easily damaged if there is no buffering mechanism. To address the above problem, this application sets the diaphragm 250 as a capsule structure and fills it with a paraffin-graphene composite phase change material. When the temperature rises, it can quickly absorb heat and melt. In conjunction with the secondary flow channel 240, it can buy time for the fluid to dissipate heat through phase change heat absorption, thus solving the problems of lack of thermal buffering capacity and large temperature fluctuations.

[0042] like Figure 2 and Figure 3As shown, the connecting section 220 is a rigid structure and an elastic membrane 221 is fixed on the surface opposite to the second groove 151; Multiple airbags 152 are uniformly embedded in the clamping plate 150 along the length direction of the second groove 151. The airbags 152 are positioned opposite to the elastic membrane 221 and are respectively connected to an external air pump through air passages.

[0043] like Figure 2 and Figure 3 As shown, a temperature sensor 160 is embedded in the outer layer 212 opposite to the transformer rectifier 300. This sensor monitors the local temperature and transmits the temperature information to the external control system. The external control system then sends a command to the air pump based on the data measured by the temperature sensor 160. This command controls the inflation state of the corresponding airbag 152, which compresses the elastic membrane 221 and locally restricts the flow rate through the connecting section 220. This prolongs the residence time of the mineral oil in the adjacent flexible section 210.

[0044] While basic temperature adaptation can be achieved through the cooperation of the flexible section 210, the main flow channel 230, and the secondary flow channel 240—for example, the flexible section 210 expands when the mineral oil flow rate increases, extending the residence time—this response is passive and uniform. The expansion of the flexible section 210 is based solely on changes in the overall flow rate and the heating degree of the transformer rectifier 300, and cannot be locally controlled for specific heating points, lacking temperature feedback. To address these issues, this application installs a temperature sensor 160 within the groove of the clamping plate 150 to directly monitor the local temperature of the first cooling pipe assembly 200. When the temperature sensor 160 detects that the temperature at a specific point exceeds the limit, it immediately triggers an external air pump, causing the airbag 152 to expand. The airbag 152 then compresses the elastic membrane 221 of the connecting section 220, changing the flow rate of the mineral oil entering the next flexible section 210. For example, the flow rate increases in the overheated area to quickly remove heat; the flow rate is maintained in the normal area to avoid energy waste and achieve dynamic flow rate adjustment. At the same time, it can limit the flow rate through the connecting section 220, thereby prolonging the residence time of some mineral oil in the adjacent flexible section 210, solving the problem of lack of fine local heat dissipation control. By changing the flow rate at different locations, it is possible to customize for individual heat-generating points and avoid a "one-size-fits-all" heat dissipation strategy.

[0045] The temperature sensor 160 is used to monitor the local temperature, and is preferably a TMP117 digital temperature sensor; the external control system is used to control the coordinated operation of the external air pump, and is preferably a programmable logic controller; both are existing technologies and will not be described in detail here.

[0046] Furthermore, the support leg 100, rear cover 101, transformer and rectifier device 300, housing 110, first groove, top cover 111, baffle 120, fin 130, oil tank 140, bracket, oil inlet pipe 141, oil outlet pipe 142, clamping plate 150, sealing deflector, deflector, and second groove 151 in this application are all referenced from a high-frequency switching power supply transformer and rectifier device in patent number CN111312472B. The clamping plate 150 includes a first clamping plate and a second clamping plate, which is prior art. Its specific structure and working principle have been described in detail in the cited patent, so this application will not elaborate further.

[0047] In actual operation, the steps of this embodiment are as follows: Step 1: First, place the transformer rectifier 300 inside the housing 110 and install the clamping plate 150 around it. Then, fix the top cover 111 to the housing 110 and the rear cover 101 to form a sealed overall structure. The first cooling pipe assembly 200 and the second cooling pipe 201 of the circulating cooling unit are pre-placed in the clamping plate 150 and the second groove 151 and the first groove of the housing 110. The oil storage tank 140 is connected to the cooling pipe through the oil inlet pipe 141 and the oil outlet pipe 142 and is filled with mineral oil. The baffle plate 120 and the fins 130 are installed on the outside of the housing 110 for auxiliary heat dissipation and dust and water protection. Step 2: After the device is started, high-voltage AC power is input to the transformer and rectifier 300. The input filter 310 first filters the AC power, and the input rectifier 320 converts the filtered AC power into high-voltage DC power. The electromagnetic chip 330 inverts the high-voltage DC power into high-frequency AC power through the three-phase winding structure of the input coil and the output coil, and adjusts the output voltage to adapt to load changes. The output rectifier filter 340 rectifies the high-frequency AC power into smooth DC power to ensure stable power output. Step 3: As heat is generated during operation, the heat dissipation system is activated. The mineral oil in the oil storage tank 140 flows into the main channel 230 of the first cooling pipe assembly 200 through the oil inlet pipe 141, flows through the first and second grooves 151 around the clamping plate 150 and the shell 110, absorbs the heat of the transformer rectifier 300, and the mineral oil after absorbing heat returns to the oil storage tank 140 through the oil outlet pipe 142 for cooling and reuse. At the same time, the fins 130 on the outside of the shell 110 and the rear cover 101 assist in heat dissipation through air convection, enhancing the overall heat dissipation effect. Step 4: When the device is locally overheated (such as in the electromagnetic chip 330 area), the adaptive mechanism of the circulating cooling unit is activated. The flexible section 210 of the first cooling pipe assembly 200 expands radially after being heated, increasing the contact area with the clamping plate 150 and the second groove 151, thereby improving the heat transfer efficiency. At the same time, the temperature sensor 160 monitors the local temperature and sends the data to the external control system. If the temperature exceeds the threshold, the inner layer 211 expands and deforms, automatically opening the inlet 202, allowing some mineral oil to be diverted from the main channel 230 to the secondary channel 240. The spiral diaphragm 250 inside the secondary channel 240 extends the oil flow path and increases the heat absorption time. The composite phase change material (such as a paraffin-graphene mixture) inside the diaphragm 250 melts and absorbs heat at instantaneous high temperature, providing a thermal buffer and smoothing temperature fluctuations.

[0048] Step 5: Based on the data from temperature sensor 160, the external control system commands the air pump to adjust the inflation state of the airbag 152 in the clamping plate 150. After the airbag 152 expands, it squeezes the elastic membrane 221 of the connecting section 220, locally restricting the flow of mineral oil and prolonging its residence time in the adjacent flexible section 210, thereby accurately dissipating heat from the hot spot. Throughout the process, the oil gauge monitors the oil level in the oil storage tank 140, and the device continues to run until the power is turned off. Step Six: When the device needs to be shut down or maintained, first disconnect the power supply, rotate the clamp 150 through the sealing deflector and the deflector to expose the transformer rectifier 300 for easy inspection or replacement. After the mineral oil circulation stops, the fins 130 continue to dissipate residual heat. After maintenance is completed, fix the clamp 150 and the top cover 111 again to restart the device.

[0049] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages: It effectively solves the technical problems of poor adaptability of cooling pipes, inability to meet the heat dissipation requirements of local overheating, reduced applicability, lack of thermal buffering capacity, limited heat dissipation efficiency, and reduced service life of transformer rectifier devices in the existing technology. It achieves the technical effects of improved adaptability of cooling pipes, meeting the heat dissipation requirements of local overheating, expanding the applicability, having thermal buffering capacity, improving heat dissipation efficiency, and increasing the service life of transformer rectifier devices.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A transformer rectifier device for high-frequency switching power supply, comprising a foot (100), a back cover (101), a shell (110), a first groove, a top cover (111), a shutter (120), a fin (130), an oil tank (140), a bracket, an oil inlet pipe (141), an oil outlet pipe (142), a clamping plate (150), a sealing deflector, a deflector, a second groove (151) and a circulating cooling unit, characterized in that: the circulating cooling unit comprises a first cooling pipe assembly (200) and a second cooling pipe (201); the first cooling pipe assembly (200) is uniformly provided with a plurality of flexible sections (210) and connecting sections (220) along its length direction, the flexible sections (210) are made of silicone rubber material and radially expand after being heated to increase the heat dissipation contact area with the clamping plate (150) and the second groove (151); the flexible sections (210) are provided with two layers, including an inner layer (211) and an outer layer (212), and a main flow channel (230) and a secondary flow channel (240) are formed inside, for self-adapting and meeting the heat dissipation requirements of different positions and different heating degrees in the transformer rectifier device (300). the transformer rectifier device (300) comprises an input filter (310), an input rectifier (320), an output coil, an input coil, an electromagnetic chip (330), an output rectifier filter (340) and a circuit protector (350) structure, for converting the high-voltage direct current converted by the input rectifier (320) from the high-voltage alternating current of the three-phase winding in the transformer rectifier device (300) into high-frequency alternating current, changing the frequency of the alternating current while adjusting the output voltage, so that the output voltage is not affected by the load and the input power voltage, and realizing the transformer rectification of the high-frequency switching power supply.

2. A transformer rectifier device for high frequency switching power supply as claimed in claim 1, wherein the first cooling pipe assembly (200) comprises two channels, which are divided into flexible sections (210) and connecting sections (220); the flexible sections (210) and the connecting sections (220) are connected in head-to-tail manner, and a plurality of groups of flexible sections (210) and connecting sections (220) are connected with each other to jointly form the first cooling pipe assembly (200).

3. The transformer rectifier device for high frequency switching power supply according to claim 1, wherein the opposite surfaces of the shell (110), the clamping plate (150) and the first cooling pipe assembly (200) are provided with flexible layers for adapting to the deformation of the flexible sections (210).

4. A transformer rectifier device for high frequency switching power supplies as defined in claim 3, characterized in that the flexible sections (210) are provided with two layers, including an inner layer (211) and an outer layer (212); 5. The transformer rectifier device for high frequency switching power supply according to claim 3, wherein the inner layer (211) is located inside the first cooling pipe assembly (200) and forms a main flow channel (230) with the connecting section (220) for conveying part of the mineral oil and mainly dissipating heat; the outer layer (212) is located outside the first cooling pipe assembly (200) and forms a secondary flow channel (240) with the inner layer (211) for auxiliary heat dissipation. ​ 6. A transformer and rectifier device for use in a high frequency switching power supply as defined in claim 5, characterized in that The inner layer (211) is provided with an inlet (202) and an outlet (203) at both ends along the flow direction of the mineral oil in the oil tank (140) inside the first cooling pipe assembly (200). When the inner layer (211) detects that the temperature reaches a threshold value, the inner layer (211) expands and deforms, automatically opening the inlet (202) of the secondary flow channel (240), so that part of the mineral oil flowing into the main flow channel (230) flows into the secondary flow channel (240) from the inlet (202).

7. A transformer and rectifier device for use in a high frequency switching power supply as defined in claim 6, characterized in that The secondary flow channel (240) is fixed with a spiral diaphragm (250) inside and forms a spiral secondary flow channel (240) with the secondary flow channel (240), which is used to prolong the flow path and residence time of the mineral oil passing through the high heat generating part.

8. A transformer rectifier device for high frequency switching power supplies as defined in claim 7, characterized in that The diaphragm (250) is a capsule structure and contains a medium (260) inside. The medium (260) is a composite phase change material composed of paraffin, graphene and expanded graphite. When the instantaneous temperature increases, the medium (260) inside the diaphragm (250) quickly absorbs heat and melts, preventing instantaneous temperature rise, stabilizing temperature fluctuations, achieving dynamic heat capacity adjustment, and enhancing heat buffering capacity.

9. A transformer rectifier device for high frequency switching power supplies as defined in claim 8, characterized in that The connecting section (220) is a rigid structure and is fixed with an elastic film (221) on the opposite side of the second groove (151); The clamping plate (150) is uniformly embedded with a plurality of air bags (152) along the length direction of the second groove (151). The air bags (152) are opposite to the elastic film (221) and are respectively communicated with the external air pump through air channels.

10. The transformer rectifier assembly for high frequency switching power supply as claimed in claim 9 wherein said transformer core is made of a material selected from the group consisting of ferrite, mu-metal, permalloy, and cobalt. The outer layer (212) is embedded with a temperature sensor (160) opposite to the voltage conversion device (300), which is used to monitor the local temperature and transmit the temperature information to the external control system. Then, the external control system sends instructions to the air pump according to the data measured by the temperature sensor (160), adjusts the inflation state of the corresponding air bag (152), squeezes the elastic film (221), and locally limits the flow through the connecting section (220), thereby prolonging the residence time of the mineral oil in the adjacent flexible section (210).

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