A microwave power supply

Abstract

The utility model discloses a microwave power supply relates to power supply technical field. The utility model discloses a microwave power supply includes the casing, is located the input rectification module, inverter module, transformer, output rectification module in casing and is connected gradually, still includes fan, water cooling plate and heat exchanger, the heat exchanger is located between the transformer with output rectification module, and sets up on water cooling plate, input rectification module, inverter module and transformer all set up on water cooling plate. The utility model discloses through the combination effect of water cooling plate, heat exchanger and fan, forms the cooling circulation airflow in the casing inside of microwave power supply, and heat exchanger is located between output rectification module and transformer, and fan is used for producing circulation airflow and taking away the heat of output rectification module, and carries out heat exchange cooling through heat exchanger, utilizes water cooling plate and transmits the heat to the outside of microwave power supply, effectively solved the difficult problem of heat dissipation when microwave power supply adopts the closed casing.

Description

Technical Field

[0001] This utility model relates to the field of power supply technology, and specifically provides a microwave power supply. Background Technology

[0002] Currently, some microwave power supplies are used in environments involving conductive dust or corrosive gases, necessitating a relatively sealed structure. Because the output rectifier module and transformer within a microwave power supply generate relatively high amounts of heat, existing conventional water-cooling or air-cooling methods are insufficient to meet cooling requirements, resulting in poor heat dissipation. Furthermore, as microwave power supplies evolve towards higher power density, a well-designed structural layout will be beneficial for applications in more confined spaces. Utility Model Content

[0003] This invention provides a microwave power supply to solve the problem of poor heat dissipation in microwave power supplies.

[0004] The technical solution of this utility model is as follows:

[0005] A microwave power supply includes a housing, an input rectifier module, an inverter module, a transformer, and an output rectifier module located within the housing and electrically connected in sequence; it also includes a fan, a water-cooled plate, and a heat exchanger; the heat exchanger is located between the transformer and the output rectifier module; the input rectifier module, the inverter module, and the transformer are all mounted on the water-cooled plate; the fan is located between the transformer and the heat exchanger, or between the output rectifier module and the heat exchanger, or the fan and the heat exchanger are respectively located on both sides of the output rectifier module.

[0006] In this design, a water-cooled plate cools the heat exchanger, and a fan generates circulating airflow within the casing. The heat exchanger, cooled by the water-cooled plate, simultaneously exchanges heat with the circulating airflow, achieving the effect of cooling the airflow. The cooled circulating airflow then exchanges heat with the input rectifier module, inverter module, transformer, and output rectifier module within the casing, effectively cooling these modules and solving the problem of poor heat dissipation in the sealed casing of the microwave power supply. The power components with the highest heat generation are the power transistors in the inverter module, the transformer, and the output rectifier module. The power transistors can be directly mounted on the water-cooled plate for heat dissipation, and the transformer and output rectifier module can be directly mounted on the water-cooled plate for heat dissipation, provided the water-cooled plate size meets the requirements. During air cooling, a fan and heat exchanger are installed between the transformer and the output rectifier module. The heat exchanger heats the air, and the fan circulates the heated air within the casing, effectively reducing the heat generated by the transformer and output rectifier module, thus reducing localized heat generation.

[0007] Preferably, the output rectifier module is mounted on a water-cooled plate.

[0008] In this solution, since the output rectifier module is the high-voltage component of the microwave power supply, a high-voltage insulation problem arises when it is directly connected to the water-cooled plate. To solve the insulation problem when the output rectifier module is connected to the water-cooled plate, the two components can be encapsulated with an insulating and thermally conductive material.

[0009] Preferably, the water-cooled plate has openings or notches at both ends in the width direction, and the output rectifier module is located in the openings or notches and connected to the housing.

[0010] In this design, to meet the size requirements of the microwave power supply, an opening or notch is provided in the width direction of the water-cooled plate. The output rectifier module, which has a larger height dimension, is placed in the opening or notch, and its bottom is connected to the housing. In this design, since the output rectifier module does not exchange heat with the water-cooled plate, heat dissipation mainly relies on air cooling. One end of the fan is directly mounted on the output rectifier module, and the other end is embedded in the slot of the heat exchanger. The fan draws cooled air directly into the output rectifier module for efficient heat dissipation.

[0011] Preferably, the microwave power supply further includes a filter, which is disposed in an opening or notch of the water-cooled plate away from the output rectifier module and connected to the housing.

[0012] In this solution, because the filter itself generates little heat, it can be cooled by air cooling. Therefore, the filter is not connected to the water cooling plate, and there is no need to cool the filter with water through the water cooling plate, thereby controlling the cooling power and avoiding excessive costs.

[0013] Preferably, the output rectifier module includes a high-voltage insulation box and stacked circuit boards located inside the high-voltage insulation box. To improve the insulation performance of the output rectifier module, the high-voltage insulation box can be assembled from SMC material, and stacked circuit boards can be arranged inside the high-voltage insulation box. The high-voltage insulation box is used to isolate high voltage and form an air duct. The circuit boards are stacked to meet the insulation requirements between them. Specifically, three layers can be arranged: the top circuit board is a voltage detection circuit board, and the bottom two circuit boards are high-voltage rectifier circuit boards. The heat generated by the output rectifier module is mainly concentrated in the bottom two circuit boards, which can be cooled by fans. The fans can be arranged on both sides of the output rectifier module or on one side of the heat exchanger.

[0014] Preferably, the heat exchanger has a slot on the side facing the rectifier module; the side of the fan away from the output rectifier module is located inside the slot.

[0015] In this design, the heat exchanger is equipped with slots, and the fan is connected to the slots. The slots serve to constrain the airflow, ensuring that the airflow passing through the fan must pass through the slots of the heat exchanger, thus ensuring that the circulating airflow can be cooled by the heat exchanger.

[0016] Preferably, the water-cooled plate is provided with a water-cooled pipe inside; the heat exchanger is provided with a heat exchange pipe inside; and the water-cooled pipe is connected to the heat exchange pipe.

[0017] In this design, the water-cooled pipes are connected to the heat exchange pipes inside the heat exchanger, allowing the heat exchanger to be directly cooled by the coolant inside the water-cooled pipes, thereby improving the heat exchange efficiency of the heat exchanger and thus enhancing the cooling effect.

[0018] Preferably, the bottom of the heat exchanger is connected to the water-cooling plate by screws, and the heat exchange tubes of the heat exchanger are welded and fixed to the water-cooling tubes of the water-cooling plate.

[0019] In this design, the heat exchanger is fixed to the water-cooling plate with screws, a simple and cost-effective installation. The heat exchange tubes and water-cooling tubes are connected by welding, ensuring a tight seal between them.

[0020] Preferably, the rectifier silicon of the input rectifier module, the power transistor of the inverter module, and the transformer are all attached to the water-cooled plate.

[0021] In this solution, the input rectifier module, inverter module, and transformer are connected to the water-cooled plate, allowing for direct heat exchange and improving the cooling efficiency of the input rectifier module, inverter module, and transformer.

[0022] Preferably, the water-cooled plate has openings or notches at both ends in the width direction, and the output rectifier module is located in the openings or notches and connected to the housing.

[0023] The beneficial effects of this utility model are:

[0024] This invention utilizes a combination of a water-cooled plate, a heat exchanger, and a fan to create a cooling airflow inside the microwave power supply's casing. The heat exchanger is located between the output rectifier module and the transformer. The fan generates the airflow to carry away the heat from the output rectifier module, which is then cooled by the heat exchanger. The water-cooled plate transfers the heat to the outside of the microwave power supply, effectively solving the problem of heat dissipation difficulties that occur when a microwave power supply uses a closed casing. Attached Figure Description

[0025] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the internal structure of the microwave power supply of this utility model;

[0027] Figure 2 This is a layout diagram of the internal components of this utility model;

[0028] Figure 3 This is a schematic diagram of the structure of the water-cooled plate and heat exchanger of this utility model;

[0029] Figure 4 for Figure 3 Top view;

[0030] Figure 5 This is a structural schematic diagram of one side of the fan and output rectifier module of this utility model;

[0031] Figure 6 This is a partial structural diagram of the heat exchanger part of this utility model;

[0032] Figure 7 This is a partial left view of the heat exchanger portion of this utility model.

[0033] In the above figures, the corresponding reference numerals are as follows:

[0034] 1. Water-cooled plate; 2. Inverter module; 3. Transformer; 4. Heat exchanger; 5. Fan; 6. Output rectifier module; 7. Filter; 8. Input rectifier module; 9. Water-cooled pipe; 10. Connector; 11. Mounting slot; 12. Heat exchanger tube. Detailed Implementation

[0035] The technical solution of this utility model will be clearly and completely described in conjunction with the accompanying drawings and through specific embodiments.

[0036] Example 1:

[0037] like Figure 1 and Figure 2As shown in the figure, this embodiment provides a microwave power supply, which includes a housing, an input rectifier module 8, an inverter module 2, a transformer 3, and an output rectifier module 6 connected in series. The input rectifier module 8, inverter module 2, transformer 3, and output rectifier module 6 are disposed within the housing. Some microwave power supplies may also include a filter 7, which is also disposed within the housing. The power supply also includes a water-cooled plate 1, a heat exchanger 4, and a fan 5. The heat exchanger 4 is connected to the water-cooled plate 1, which is fixed within the housing. The water-cooled plate 1 has mounting holes for fixing the input rectifier module 8, inverter module 2, and transformer 3, allowing them to be fixed to the water-cooled plate 1. This enables direct heat exchange between the water-cooled plate 1 and the input rectifier module 8, inverter module 2, and transformer 3, achieving a cooling effect. The heat exchanger 4 is fixed to the water-cooled plate 1 with screws or other fasteners, allowing direct heat exchange between the heat exchanger 4 and the water-cooled plate 1, thus enabling the water-cooled plate 1 to cool the heat exchanger 4. The fan 5 continuously circulates the gas inside the casing by blowing air, thereby accelerating the heat exchange efficiency between the input rectifier module 8, inverter module 2, transformer 3, and output rectifier module 6 and the gas. The fan 5 and the heat exchanger 4 are arranged adjacent to each other and in pairs, so that the heat exchanger 4 can cool the air inlet or outlet of the fan 5, enabling the fan 5 to exhaust cold air and achieve the effect of circulating air cooling inside the microwave power supply.

[0038] like Figure 3 and Figure 4 As shown, the water-cooled plate 1 includes a heat-conducting plate and water-cooling pipes 9 disposed within the heat-conducting plate. The water-cooling pipes 9 are laid on the surface of the heat-conducting plate or constructed inside the heat-conducting plate. The heat-conducting plate is a metal plate with good thermal conductivity. The heat-conducting plate has mounting holes for fixing the input rectifier module 8, inverter module 2, and transformer 3. The positions of the mounting holes correspond to the installation positions of the input rectifier module 8, inverter module 2, and transformer 3. The mounting holes can be threaded holes, and the input rectifier module 8, inverter module 2, and transformer 3 can be fixed to the water-cooled plate 1 with screws. The heat-conducting plate also has through holes, allowing it to be fixed to the microwave power supply housing with screws or other fasteners. The input rectifier module 8, inverter module 2, and transformer 3 are fixed to the heat-conducting plate with screws or other fasteners.

[0039] The water-cooled pipe 9 can be made of copper, aluminum, or other materials. Each end of the liquid-cooled pipe is equipped with a connector 10, which allows connection to an external cooling source via pipe. The external cooling source can be a semiconductor liquid-cooled refrigeration system, a DC micro-cooling unit, or the like.

[0040] The connector 10 extends beyond the heat-conducting plate. When the heat-conducting plate is installed inside the housing of the microwave power supply, the housing of the microwave power supply is provided with a through hole for the connector 10 to pass through. The connector 10 passes through the through hole on the housing and is thus located outside the housing of the microwave power supply, which facilitates connection with an external cooling source.

[0041] The water-cooled pipe 9 can be laid on the top surface of the heat-conducting plate. An installation groove 11 is provided on the heat-conducting plate, and the water-cooled pipe 9 is laid within the installation groove 11. The bottom surface of the installation groove 11 is arc-shaped, and the bottom surface of the installation groove 11 fits against the outer wall of the water-cooled pipe 9, which increases the contact area between the water-cooled pipe 9 and the installation groove 11, thereby increasing the heat conduction area and improving heat exchange efficiency.

[0042] Fan 5 is used to accelerate gas flow inside the microwave power supply housing, increasing the heat exchange efficiency between the gas and components such as the input rectifier module 8, inverter module 2, transformer 3, output rectifier module 6, and filter 7. Because heat exchanger 4 cools the air inlet or outlet of fan 5, it effectively cools the gas. Therefore, the cold air discharged from fan 5 effectively cools components such as the input rectifier module 8, inverter module 2, transformer 3, output rectifier module 6, and filter 7.

[0043] To ensure effective air cooling within the casing, a slot is provided on the side of the heat exchanger 4 near the output rectifier module 6. The slot has a square opening structure, and the fan 5 is installed inside the slot. The slot is square in shape and has four side walls, the dimensions of which are adapted to the dimensions of the fan 5, allowing the fan 5 to be embedded within the slot. After the fan 5 is embedded in the slot, it can be fixed to the slot with adhesive or by using a snap-fit ​​structure.

[0044] The slot design helps to constrain airflow. The outlet of fan 5 faces the output rectifier module 6, and the inlet faces the heat exchanger 4. The airflow entering fan 5 inevitably passes through heat exchanger 4 and is therefore inevitably cooled by it. Thus, the cooled airflow, under the action of fan 5, blows towards the output rectifier module 6, allowing it to directly cool the module. Under the action of fan 5, the airflow circulates within the casing. During this circulation, the airflow temperature is at its lowest immediately after passing through heat exchanger 4. This lowest-temperature airflow directly acts on the output rectifier module 6, resulting in a large temperature difference and better cooling effect. Therefore, placing the output rectifier module 6 on one side of heat exchanger 4, near the exhaust port of fan 5, aims to improve the air-cooling effect on the module.

[0045] like Figure 5As shown, because the output rectifier module 6 and filter 7 are directly connected to the microwave power supply housing and not to the heat-conducting plate, cooling of the output rectifier module 6 and filter 7 is mainly achieved by the fan 5. If the size requirements are met, the output rectifier module 6 can also be mounted on the water-cooled plate 1 for combined air and water cooling. In one embodiment of this invention, to meet the size requirements of the microwave power supply, the output rectifier module 6 is directly mounted on the housing, and the air cooling effect of the output rectifier module 6 is improved by mounting the fan 5 and heat exchanger 4 on one side of the output rectifier module 6. The filter 7, due to its low heat generation, can be cooled and temperature controlled by air cooling. Mounting the filter 7 on the microwave power supply housing and providing an opening or notch at the corresponding water-cooled plate 1 reduces the area of ​​the water-cooled plate 1 and lowers its production cost.

[0046] The fan 5 and heat exchanger 4 are positioned on one side of the output rectifier module 6, allowing the cooled airflow to directly cool the output rectifier module 6. The airflow circulates within the housing, gradually exchanging heat with various components inside, causing its temperature to rise. Finally, heat exchange occurs at the heat exchanger 4. Therefore, the airflow temperature is at its lowest point during the circulation process when it exits from the fan 5 after heat exchange. This positioning provides the best cooling effect for the output rectifier module 6, which is not connected to the water-cooled plate 1. In other possible implementations, the fan 5 can be positioned on the side of the transformer 3 facing the heat exchanger 4, or on the other side of the output rectifier module 6 opposite to the heat exchanger 4.

[0047] The output rectifier module 6 and filter 7 are installed in the housing of the microwave power supply and are not connected to the water-cooled plate 1. Therefore, the water-cooled plate 1 has notches or openings at the corresponding positions of the output rectifier module 6 and filter 7 to avoid the water-cooled plate 1 obstructing the installation of the output rectifier module 6 and filter 7.

[0048] When the output rectifier module 6 and the filter 7 are installed in different locations, the water-cooled plate 1 needs to be provided with two notches or openings. In other words, when there are functional modules inside the housing that do not need to be cooled by the water-cooled plate 1, the area of ​​the water-cooled plate 1 can be reduced by providing notches or openings on the water-cooled plate 1, thereby reducing the production cost of the water-cooled plate 1.

[0049] The output rectifier module 6 is located in one corner of the microwave power supply. The fan 5 is directly opposite the output rectifier module 6. The cold air discharged by the fan 5 will collide with the shell of the microwave power supply after passing through the output rectifier module 6. Then the airflow will flow to other locations and exchange heat with other components. Finally, it will return to the heat exchanger 4 and then enter the air inlet of the fan 5. Overall, a circulating airflow is formed in the shell of the microwave power supply, realizing the circulating cooling of the airflow inside the microwave power supply.

[0050] The output rectifier module 6 has its own housing, and the side of the housing is provided with ventilation holes. The cold air discharged by the fan 5 enters the output rectifier module 6 through the ventilation holes on one side and is discharged from the other side. When the cold air passes through the output rectifier module 6, it will exchange heat with the output rectifier module 6 to achieve the effect of cooling the output rectifier module 6.

[0051] The heat exchanger 4 is fixedly connected to the heat-conducting plate by screws or other fasteners. The heat exchanger 4 can exchange heat with the heat-conducting plate, allowing the heat-conducting plate to cool the heat exchanger 4. The radiator can be a finned radiator.

[0052] Example 2:

[0053] This second embodiment provides a microwave power supply. Unlike the first embodiment, the heat exchanger 4 is equipped with a heat exchange tube 12.

[0054] The heat exchanger 4 is a square tube. One end of the heat exchanger 4 has a slot for connecting to the fan 5, and the opposite end has a grid structure. Heat exchange tubes 12 are disposed inside the heat exchanger 4, with both ends extending outside the heat exchanger 4. Water-cooled tubes 9 are connected to the heat exchange tubes 12. Coolant in the water-cooled tubes 9 enters the heat exchange tubes 12, and the airflow passing through the heat exchanger 4 exchanges heat with the heat exchange tubes 12, thus water-cooling the airflow and improving the cooling efficiency.

[0055] like Figure 6 and Figure 7 As shown, the heat exchange tube 12 is arranged in the heat exchanger 4 in the form of a folded coil. The folded coil can increase the surface area of ​​the heat exchange tube 12 in the heat exchanger 4 and increase the contact area between the airflow and the heat exchange tube 12, thereby improving the heat exchange efficiency between the airflow and the heat exchange tube 12.

[0056] Along the air intake direction of the fan 5, two or more layers of heat exchange tubes 12 can be installed. By increasing the number of heat exchange tube layers 12, the surface area of ​​the heat exchange tubes 12 inside the heat exchanger 4 can be increased, which can also improve the heat exchange effect between the airflow and the heat exchange tubes 12.

[0057] As shown in the figure, when the heat exchange tubes 12 are arranged in a folded coil configuration, the folds of the heat exchange tubes 12 can be staggered, thus forming two layers of heat exchange tubes 12 within the heat exchanger 4. The staggered folds of the heat exchange tubes 12 ensure that the inlet and outlet ends of the heat exchange tubes 12 are located on the same vertical plane, facilitating the connection between the water exchange pipe and the water-cooling pipe 9. Simultaneously, the staggered folds reduce the vertical space required for the folded sections of the heat exchange tubes 12, allowing for more folds in the vertical direction, thus fully utilizing the internal space of the heat exchanger 4 despite its limited dimensions.

[0058] Example 3:

[0059] This third embodiment provides a microwave power supply. Unlike the first embodiment, the output rectifier module 6 in this third embodiment is connected to the water-cooled plate 1. An insulating and heat-conducting material is provided between the output rectifier module 6 and the water-cooled plate 1, or the output rectifier module 6 avoids high-voltage insulation problems by providing an insulating shell.

[0060] The main heat-generating components of the output rectifier module 6 are the rectifier bridge and the filter capacitor. In this embodiment, the rectifier bridge of the output rectifier module 6 is located at the bottom of the output rectifier module 6 and is attached to the water-cooled plate 1. The water-cooled plate 1 can directly exchange heat with the rectifier bridge, achieving the effect of cooling the output rectifier module 6. For the filter capacitor, the fan 5 and the heat exchanger 4 are still used to achieve cooling.

[0061] It should be noted that when the output rectifier module 6 is fixed to the water-cooled plate 1, no notches or openings are set at the positions corresponding to the output rectifier module 6 on the water-cooled plate 1, so that the output rectifier module 6 and the water-cooled plate 1 are in close contact, so as to achieve the effect of heat exchange between the output rectifier module 6 and the water-cooled plate 1.

[0062] Furthermore, the size of the microwave power supply housing is adjusted according to the installation position of the output rectifier module 6, so that the output rectifier module 6 can be installed inside the housing.

Claims

1. A microwave power supply, characterized in that, The device includes a housing, an input rectifier module (8), an inverter module (2), a transformer (3), and an output rectifier module (6) located within the housing and electrically connected in sequence; it also includes a fan (5), a water-cooled plate (1), and a heat exchanger (4); the heat exchanger (4) is located between the transformer (3) and the output rectifier module (6); the input rectifier module (8), the inverter module (2), and the transformer (3) are all mounted on the water-cooled plate (1); the fan (5) is located between the transformer (3) and the heat exchanger (4), or the fan (5) is located between the output rectifier module (6) and the heat exchanger (4), or the fan (5) and the heat exchanger (4) are respectively mounted on both sides of the output rectifier module (6).

2. The microwave power supply according to claim 1, characterized in that, The output rectifier module (6) is mounted on the water-cooled plate (1), and an insulating and thermally conductive material is encapsulated between the output rectifier module (6) and the water-cooled plate (1).

3. The microwave power supply according to claim 1, characterized in that, The water-cooled plate (1) has openings or notches at both ends, and the output rectifier module (6) is located in the opening or notch at one end and is connected to the housing.

4. The microwave power supply according to claim 3, characterized in that, It also includes a filter (7), which is disposed in an opening or notch at the other end and connected to the housing.

5. The microwave power supply according to claim 3, characterized in that, The output rectifier module (6) includes a high-voltage insulation box and a circuit board located inside the high-voltage insulation box and stacked thereon.

6. The microwave power supply according to claim 1, characterized in that, The heat exchanger (4) has a slot on one side; the fan (5) is installed on the output rectifier module (6) and located in the slot.

7. The microwave power supply according to claim 1, characterized in that, The water-cooled plate (1) is provided with a water-cooled pipe (9); the heat exchanger (4) is provided with a heat exchange pipe (12); the water-cooled pipe (9) is connected to the heat exchange pipe (12).

8. The microwave power supply according to claim 7, characterized in that, The bottom of the heat exchanger (4) is connected to the water cooling plate (1) or the shell by screws, and is fixed by welding the heat exchange tube (12) of the heat exchanger (4) to the water cooling tube (9) of the water cooling plate (1).

9. The microwave power supply according to claim 1, characterized in that, The power transistors of the input rectifier module (8), the inverter module (2), and the transformer (3) are all attached to the water-cooled plate (1).

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