Power converter

Abstract

According to the power converter, a cavity is formed in a shell, a first electrolytic dehumidifier is embedded in the shell, the first electrolytic dehumidifier comprises a first surface and a second surface which are arranged oppositely, the first surface is located in the cavity, the second surface is located outside the shell, and the first electrolytic dehumidifier is used for electrolyzing water vapor in the cavity to generate hydrogen ions and hydroxyl ions. Hydroxyl ions are decomposed into hydrogen ions and oxygen under the action of the first electrolysis dehumidifier, and the hydrogen ions can penetrate through the first electrolysis dehumidifier and are combined with the oxygen outside the shell to generate water. Dehumidification of the power converter is achieved through the first electrolytic dehumidifier, generation of condensate water in the cavity is reduced, and reduction of power consumption of the power converter is facilitated.

Description

Technical Field

[0001] The present application relates to the field of new energy technology, and in particular to a power converter. Background Art

[0002] As a key conversion device in power systems, the proper operation of inverters is crucial for ensuring power supply. However, inverter operation is subject to various environmental factors, particularly humidity. High humidity can easily cause short circuits in electrical components within the inverter, increasing operational risks. Existing dehumidification processes require mechanical or semiconductor cooling, which requires high power and consumes a lot of electricity. Condensation is also easily generated during the cooling process, which can cause electrical short circuits. Utility Model Content

[0003] The embodiments of the present application provide a power converter that reduces the generation of condensed water during the dehumidification process and helps reduce power consumption.

[0004] The present application provides a power converter for converting direct current from a photovoltaic module or an energy storage battery into alternating current. The power converter includes a housing and a first electrolytic dehumidifier. The housing is formed with a chamber. The first electrolytic dehumidifier is embedded in the housing. The first electrolytic dehumidifier includes a first surface and a second surface arranged opposite to each other, the first surface is located in the chamber, and the second surface is located outside the housing. The first electrolytic dehumidifier is used to electrolyze the water vapor in the chamber to generate hydrogen ions and hydroxide ions. The hydroxide ions are decomposed into hydrogen ions and oxygen under the action of the first electrolytic dehumidifier. The hydrogen ions can pass through the first electrolytic dehumidifier and combine with the oxygen outside the housing to generate water.

[0005] In the power converter of the present application, the water vapor in the shell is decomposed into hydrogen ions and hydroxide ions by the first electrolytic dehumidifier, and the hydroxide ions are further decomposed into hydrogen ions and oxygen under the action of the first electrolytic dehumidifier. In this way, the hydrogen ions move to the outside of the shell through the first electrolytic dehumidifier and combine with the oxygen outside the shell to form water, and the oxygen generated by the decomposition of the hydroxide ions remains in the chamber, thereby achieving dehumidification of the power converter. At the same time, the generation of condensed water in the chamber is reduced, and the power consumption of the power converter is reduced compared to mechanical refrigeration or semiconductor refrigeration.

[0006] In one possible implementation, the power converter further includes a circuit board, a first inductor, and a relay. The circuit board, the first inductor, and the relay are all housed in a chamber. The housing includes a base plate, a cover plate, and a side plate, the base plate and the cover plate being stacked along a first direction, and the side plate connecting the edges of the cover plate and the base plate. The circuit board and the cover plate are arranged relative to each other along the first direction, and the relay and the first inductor are both arranged on a side of the circuit board facing the cover plate. The first inductor and the first electrolytic dehumidifier are located on the same side of the relay along a second direction, and the second direction is perpendicular to the first direction. Along the second direction, the distance between the first electrolytic dehumidifier and the first inductor is smaller than the distance between the first electrolytic dehumidifier and the relay.

[0007] In the second direction, the distance between the first electrolytic dehumidifier and the first inductor can be the distance between the center of the first electrolytic dehumidifier and the center of the first inductor. Similarly, the distance between the first electrolytic dehumidifier and the relay can be the distance between the center of the first electrolytic dehumidifier and the center of the relay. The first inductor generates more heat than the relay. Placing the first electrolytic dehumidifier closer to the first inductor increases the temperature near the first inductor, effectively accelerating water evaporation and allowing water vapor to enter the first electrolytic dehumidifier for electrolysis more quickly, thereby reducing or preventing condensation around the first inductor.

[0008] In one possible implementation, when the power converter is mounted on the support, the first direction is perpendicular to the direction of gravity, and the first electrolytic dehumidifier is mounted slightly above the center of the cover along the direction of gravity. When the power converter is mounted on the support, water vapor in the chamber floats slightly above the center of the chamber along the direction of gravity, allowing the water vapor to more quickly enter the first electrolytic dehumidifier located slightly above the center of the cover, thereby improving dehumidification efficiency.

[0009] In one possible implementation, when the power converter is mounted on the support, the first direction is perpendicular to the direction of gravity, and the first electrolytic dehumidifier is mounted on the side panel farthest from the ground along the direction of gravity. When the power converter is mounted on the support, water vapor in the chamber floats slightly above the center of the chamber along the direction of gravity, allowing the water vapor to more quickly enter the first electrolytic dehumidifier located on the side panel farthest from the ground, thereby improving dehumidification efficiency.

[0010] In one possible implementation, the power converter further includes a fan housed within the chamber. The fan and the first electrolytic dehumidifier are located on the side of the circuit board facing the first inductor. The fan is configured to accelerate air flow around the first inductor, thereby directing water vapor toward the first electrolytic dehumidifier. Accelerating the flow of water vapor through the fan can move floating water vapor toward the first electrolytic dehumidifier, accelerating dehumidification and facilitating lowering humidity within the chamber. Furthermore, since the fan and the first inductor are located on the same side of the circuit board, the fan can also dissipate heat generated by the first inductor, accelerating heat dissipation from the first inductor.

[0011] In one possible implementation, a fan is located on a side of the first inductor facing away from the circuit board, and opposite the first inductor, along a first direction. A first electrolytic dehumidifier is located on a side of the fan facing the circuit board along the first direction. The fan's airflow is directed toward the first inductor. When the fan blows air toward the first inductor, it can move water vapor around the first inductor toward the first electrolytic dehumidifier, located between the circuit board and the fan, accelerating dehumidification. Simultaneously, the fan is positioned directly opposite and toward the first inductor, generating airflow that can quickly remove heat accumulated around the first inductor, improving heat dissipation efficiency.

[0012] In one possible implementation, the power converter further includes a transformer. The first inductor and the transformer are both located on the same side of the relay along the second direction. The first inductor and the transformer are spaced apart in sequence along a third direction, and the third direction, the first direction, and the second direction are mutually perpendicular. The transformer is a magnetic device and generates more heat than the relay. The first inductor and the transformer are located on the same side of the relay. The transformer and the first inductor can share a first electrolytic dehumidifier, which reduces costs and also helps reduce power consumption. In addition, the higher temperature around the first inductor and the transformer can accelerate water evaporation, allowing water vapor to enter the first electrolytic dehumidifier for electrolysis more quickly, thereby reducing or avoiding the formation of condensation around the first inductor and the transformer.

[0013] In one possible implementation, the first electrolytic dehumidifier includes an electrolytic dehumidifier plate and a fan, both of which are fixedly connected to the housing. The fan is provided on either the side of the electrolytic dehumidifier plate facing the chamber or the side of the electrolytic dehumidifier plate facing away from the chamber, with air flowing toward the electrolytic dehumidifier plate. The fan integrated into the first electrolytic dehumidifier provides turbulence, accelerating the flow of air in the first electrolytic dehumidifier, strengthening and speeding up the dehumidification process, and thereby improving the dehumidification efficiency of the electrolytic dehumidifier plate.

[0014] In one possible implementation, the power converter further includes an oxygen concentration sensor and an exhaust valve. The oxygen concentration sensor is configured to detect the oxygen concentration within the chamber. The exhaust valve is disposed within the housing, connecting the chamber to the exterior of the housing and discharging oxygen from the chamber. The oxygen concentration sensor can detect the oxygen concentration within the chamber. The first electrolytic dehumidifier dehumidifies water vapor, generating oxygen. When the oxygen concentration within the chamber is excessively high, the exhaust valve is controlled to open to exhaust oxygen, thereby preventing oxygen accumulation within the chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments of the present application will be described below.

[0016] Figure 1 This is a schematic diagram of the network configuration of a photovoltaic storage system for a large-scale ground power station or industrial and commercial application scenario provided by one embodiment of the present application;

[0017] Figure 2 A structural schematic diagram of a power converter according to an embodiment of the present application is provided.

[0018] Figure 3 A structural schematic diagram of a power converter according to an embodiment of the present application is provided.

[0019] Figure 4 A structural schematic diagram of a power converter according to an embodiment of the present application is provided.

[0020] Figure 5 A structural schematic diagram of a power converter according to an embodiment of the present application is provided.

[0021] Figure 6 A structural schematic diagram of a first electrolytic dehumidifier and a second electrolytic dehumidifier according to an embodiment of the present application is provided.

[0022] Figure 7 A structural schematic diagram of a first electrolytic dehumidifier and a second electrolytic dehumidifier according to an embodiment of the present application is provided.

[0023] BRIEF DESCRIPTION OF DRAWINGS

[0024] X - first direction; Y - second direction; Z - third direction; 10 - housing; 11 - chamber; 12 - bottom plate; 13 - side plate; 14 - cover plate; 15 - exhaust valve; 20 - circuit board; 30a - first inductor; 30b - second inductor; 40 - capacitor; 50 - transformer; 60 - relay; 70 - Hall sensor; 80a - first electrolytic dehumidifier; 80b - second electrolytic dehumidifier; 81 - electrolytic dehumidification plate; 811 - electrolyte membrane; 812 - anode catalyst layer; 813 - anode diffusion layer; 814 - cathode catalyst layer; 815 - cathode diffusion layer; 82 - electrolytic control unit; 83 - oxygen concentration sensor; 84 - temperature and humidity sensor; 85 - fan; 90 - air blower; 100 - power converter; 100a - photovoltaic inverter; 100b - energy storage converter; 200 - photovoltaic module; 300 - box-type substation; 400 - booster station; 500 - power grid; 600 - energy storage system. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be described in further detail below with reference to the accompanying drawings.

[0026] Please refer to Figure 1 , Figure 1This is a network diagram of a photovoltaic storage system for a large-scale ground power station or industrial and commercial application scenario provided by one embodiment of the present application. The photovoltaic module 200 converts solar energy into direct current (DC) through the photovoltaic effect. The photovoltaic inverter 100a converts the DC power output by the photovoltaic module 200 into alternating current (AC) and further transmits the AC power to the box-type substation 300. The box-type substation 300 converts the low-voltage AC power output by the photovoltaic inverter 100a into medium-voltage AC power, and then transmits the AC power to the booster station 400 (grid 500) or the box-type substation 300 corresponding to the energy storage system 600. The energy storage system 600 is used to store unstable electrical energy from the photovoltaic module 200 and output stable electrical energy to the grid 500 through the energy storage converter 100b and the corresponding box-type substation 300. It will be understood that the energy storage system 600 includes an energy storage battery, and the DC power of the energy storage battery is converted into AC power by the energy storage converter 100b. The energy storage converter 100b is also used to convert the AC power of the box-type substation 300 corresponding to the energy storage system 600 into DC power to charge the energy storage system 600.

[0027] Figure 1 In the photovoltaic storage system shown, the photovoltaic inverter 100a and the energy storage converter 100b are the core devices for power conversion, which are collectively referred to as the power converter 100. The structure of the power converter 100 provided by the present application will be described in detail below with reference to the accompanying drawings. It is worth mentioning that the power converter 100 provided by the present application can also be applied to household photovoltaic systems. Figure 1 Similarly, this application will not repeat them again.

[0028] See also Figure 2 and Figure 3 , Figure 2 A schematic structural diagram of a power converter 100 provided in one embodiment of the present application; Figure 3 A schematic diagram of the internal structure of a power converter 100 provided in one embodiment of the present application. The power converter 100 is used to convert direct current from a photovoltaic module 200 or an energy storage battery into alternating current. The power converter 100 includes a housing 10, a circuit board 20, a first inductor 30a, a capacitor 40, a transformer 50, a relay 60, a Hall sensor 70 and a first electrolytic dehumidifier 80a. The housing 10 is formed with a chamber 11, which is used to accommodate the circuit board 20, the first inductor 30a, the capacitor 40, the transformer 50, the relay 60 and the Hall sensor 70. The first inductor 30a, the capacitor 40, the transformer 50, the relay 60 and the Hall sensor 70 are all fixedly connected to the circuit board 20 and electrically connected to the circuit board 20. The first electrolytic dehumidifier 80a is embedded in the housing 10, and the first electrolytic dehumidifier 80a is used to perform electrolytic dehumidification on the power converter 100.

[0029] Specifically, the shell 10 includes a bottom plate 12, a side plate 13 and a cover plate 14, the bottom plate 12 and the cover plate 14 are oppositely arranged along a first direction X, the side plate 13 connects edges of the bottom plate 12 and the cover plate 14, and the bottom plate 12, the side plate 13 and the cover plate 14 jointly enclose the cavity 11. The circuit board 20 is oppositely arranged with the cover plate 14 along the first direction X. The first inductor 30a, the capacitor 40, the transformer 50, the relay 60 and the Hall sensor 70 are all arranged on a side of the circuit board 20 facing the cover plate 14.

[0030] For example, the first inductor 30a and the relay 60 are arranged on the circuit board 20 along a second direction Y, and the second direction Y is perpendicular to the first direction X. The first inductor 30a and the first electrolytic dehumidifier 80a are located on the same side of the relay 60 along the second direction Y. The first electrolytic dehumidifier 80a is arranged close to the first inductor 30a, the temperature near the first inductor 30a is higher, which can effectively accelerate water evaporation and improve the dehumidification efficiency of the first electrolytic dehumidifier 80a.

[0031] The first inductor can be a boost inductor or an LCL inductor. The relay 60 is used to control the on-off of the internal circuit of the power converter 100, and can automatically disconnect when a circuit fault occurs in the power converter 100, so as to ensure that the power converter 100 is timely disconnected from the power grid. The relay 60 can be a contact relay or a solid-state relay. The contact relay connects or disconnects the circuit through the internal mechanical contact. The solid-state relay can realize the opening and closing of the circuit by controlling the optical, electrical or magnetic signal. The relay 60 can also be other types of relays, which are not limited.

[0032] In one embodiment, the capacitor 40, the first inductor 30a and the transformer 50 are closer to the side plate 13 than the relay 60, and the Hall sensor 70 is closer to the side plate 13 than the relay 60, so that the capacitor 40, the first inductor 30a, the transformer 50 and the Hall sensor 70 are closer to the side plate 13 and can be cooled through the side plate 13. The transformer 50 is a magnetic device, and is used to step up or step down the voltage output by the power converter 100 to meet the use requirements of different electrical devices. The transformer 50 can be a step-down transformer, a step-up transformer, a single-phase transformer or a three-phase transformer, which is not limited.

[0033] For example, along the second direction Y, the first inductor 30a and the transformer 50 are both located on the same side of the relay 60, that is, the first inductor 30a, the transformer 50 and the first electrolytic dehumidifier 80a are all located on the same side of the relay 60, and the first inductor 30a and the transformer 50 are spaced in sequence along the third direction Z, and the third direction Z, the second direction Y and the first direction X are perpendicular to each other. In this way, the heat generated by the first inductor 30a and the transformer 50 can accelerate the evaporation of surrounding water, which is beneficial to improving the dehumidification efficiency of the first electrolytic dehumidifier 80a. Moreover, the transformer 50 and the first inductor 30a can share a first electrolytic dehumidifier 80a, which reduces costs and helps to reduce power consumption. The first electrolytic dehumidifier 80a includes a first surface and a second surface that are arranged in opposite directions, the first surface is located in the chamber 11, and the second surface is located outside the shell 10. The first surface is in contact with the water vapor in the chamber 11, and the second surface is in contact with the oxygen outside the shell.

[0034] The first electrolytic dehumidifier 80a electrolyzes the water vapor in the chamber 11 to generate hydrogen ions and hydroxide ions. The hydroxide ions are decomposed into hydrogen ions and oxygen by the first electrolytic dehumidifier 80a. All hydrogen ions in the chamber 11 are able to pass through the first electrolytic dehumidifier 80a and move outside the housing 10. There, they combine with oxygen outside the housing 10 to generate water, thereby dehumidifying the power converter 100. This also reduces the generation of condensed water in the chamber 11 and reduces the power consumption of the power converter 100 compared to mechanical refrigeration or semiconductor refrigeration.

[0035] For example, along the second direction Y, the distance between the first electrolytic dehumidifier 80a and the first inductor 30a is smaller than the distance between the first electrolytic dehumidifier 80a and the relay 60. Specifically, along the second direction Y, the distance between the first electrolytic dehumidifier 80a and the first inductor 30a can be the distance between the center of the first electrolytic dehumidifier 80a and the center of the first inductor 30a. Similarly, the distance between the first electrolytic dehumidifier 80a and the relay 60 can be the distance between the center of the first electrolytic dehumidifier 80a and the center of the relay 60. The first inductor 30a generates more heat than the relay 60 and is a high-heat-generating component in the power converter 100. The first electrolytic dehumidifier 80a is positioned closer to the first inductor 30a than the relay 60. The higher temperature near the first inductor 30a effectively accelerates water evaporation, allowing water vapor around the first inductor 30a to enter the first electrolytic dehumidifier 80a for electrolysis more quickly, thereby reducing or preventing condensation around the first inductor 30a. It can be understood that the water vapor in the entire chamber 11 can be electrolytically dehumidified by the first electrolytic dehumidifier 80a.

[0036] In one embodiment, along the second direction Y, the first electrolytic dehumidifier 80a is closer to the transformer 50 than to the relay 60, similarly, the distance between the first electrolytic dehumidifier 80a and the transformer 50 can be the distance between the center of the first electrolytic dehumidifier 80a and the center of the transformer 50, the first electrolytic dehumidifier 80a is arranged closer to the transformer 50 than to the relay 60, thus, the heat generated by the transformer 50 and the first inductor 30a can accelerate water evaporation, so that water vapor enters the first electrolytic dehumidifier 80a for electrolysis more quickly, accelerating dehumidification and reducing or avoiding the generation of condensation around the first inductor 30a and the transformer 50.

[0037] In one embodiment, along the second direction Y, the capacitor 40 and the first inductor 30a are located on the same side of the relay 60, and the capacitor 40, the first inductor 30a and the transformer 50 are arranged at intervals along the third direction Z. Along the third direction Z, the first electrolytic dehumidifier 80a can be arranged between the capacitor 40 and the transformer 50. In this way, the capacitor 40, the first inductor 30a and the transformer 50 can be dehumidified by one first electrolytic dehumidifier 80a, achieving dehumidification effect while reducing the number of first electrolytic dehumidifiers 80a as much as possible, which can effectively reduce the power consumption of the power converter 100. In addition, the first electrolytic dehumidifier 80a is closer to the capacitor 40, the first inductor 30a and the transformer 50, and water vapor can enter the first electrolytic dehumidifier 80a more quickly, accelerating dehumidification.

[0038] In one embodiment, when the power converter 100 is hung on a support (such as a wall), the first direction X is perpendicular to the direction of gravity, and along the direction of gravity, the water vapor in the chamber 11 floats at a position above the middle of the chamber 11, and along the direction of gravity, the first electrolytic dehumidifier 80a is mounted on the middle of the cover plate 14, that is, along the direction of gravity, the first electrolytic dehumidifier 80a is located on the side of the middle of the cover plate 14 away from the ground, so that water vapor can enter the first electrolytic dehumidifier 80a located on the middle of the cover plate 14 more quickly, which is conducive to improving the dehumidification efficiency.

[0039] In another embodiment, the power converter 100 is hung on a support, the first direction X is perpendicular to the direction of gravity, and along the direction of gravity, the water vapor in the chamber 11 floats at a position above the middle of the chamber 11. Along the direction of gravity, the first electrolytic dehumidifier 80a is mounted on the side plate 13 farthest from the ground, so that water vapor can enter the first electrolytic dehumidifier 80a located on the side plate 13 farthest from the ground more quickly, which is conducive to improving the dehumidification efficiency.

[0040] Please refer to Figure 4 , Figure 4This is a schematic diagram of the structure of another power converter 100 provided in one embodiment of the present application. In this case, the power converter 100 also includes a fan 90, which is housed within the chamber 11. The fan 90 is configured to accelerate the flow of air within the chamber 11, thereby directing water vapor toward the first electrolytic dehumidifier 80a. The fan 90 and the first electrolytic dehumidifier 80a are located on the side of the circuit board 20 facing the first inductor 30a. Thus, the accelerated airflow generated by the fan 90 can drive air flow around the first inductor 30a, accelerating heat dissipation from the first inductor 30a.

[0041] For example, when the power converter 100 is mounted on a support, the fan 90 is arranged in a position slightly above the middle of the chamber 11 along the direction of gravity. For example, the fan 90 can be arranged on the cover plate 14 or the side plate 13. The fan 90 accelerates the air flow around the first inductor 30a, so that the water vapor is accelerated to blow toward the first electrolytic dehumidifier 80a. Specifically, along the first direction X, the fan 90 is located on the side of the first inductor 30a away from the circuit board 20 and is arranged opposite to the first inductor 30a. The air outlet direction of the fan 90 is toward the first inductor 30a. In this way, the fan 90 can blow air directly toward the first inductor 30a. The airflow generated by the fan 90 can quickly take away the heat accumulated around the first inductor 30a, thereby improving the heat dissipation efficiency. In addition, it can also reduce the heat generated by other devices blown by the fan 90 toward the first inductor 30a, thereby reducing the impact of heat generated by other devices on the first inductor 30a. Furthermore, the first electrolytic dehumidifier 80a is located on the side of the fan 90 toward the circuit board 20 along the first direction X. When the fan 90 blows toward the first inductor 30a, the water vapor around the first inductor 30a can be blown toward the first electrolytic dehumidifier 80a located between the circuit board 20 and the fan 90, thereby accelerating dehumidification.

[0042] See also Figure 5 , Figure 5 This is a schematic diagram of the structure of another power converter 100 provided in one embodiment of the present application. The power converter 100 also includes a second inductor 30b, which is disposed on and electrically connected to the circuit board 20. The second inductor 30b is located on a side of the relay 60 facing away from the first inductor 30a along the second direction Y. The first and second inductors 30a, 30b, are spaced apart on opposite sides of the relay 60, reducing the potential for mutual heat generation from the two inductors.

[0043] In one embodiment, the power converter 100 may further include a second electrolytic dehumidifier 80b, which is mounted on the housing 10. Similar to the first electrolytic dehumidifier 80a, the second electrolytic dehumidifier 80b includes a third surface and a fourth surface facing each other, the third surface being located within the chamber 11, and the fourth surface being located outside the housing 10. The second electrolytic dehumidifier 80b is configured to electrolyze the water vapor within the chamber 11 to generate hydrogen ions and hydroxide ions. The hydroxide ions are decomposed into hydrogen ions and oxygen under the action of the second electrolytic dehumidifier 80b. The hydrogen ions can pass through the second electrolytic dehumidifier 80b and combine with the oxygen outside the housing 10 to generate water. The working principle of the second electrolytic dehumidifier 80b is the same as that of the first electrolytic dehumidifier 80a and will not be described in detail.

[0044] Along the second direction Y, the distance between the second electrolytic dehumidifier 80b and the second inductor 30b is smaller than the distance between the second electrolytic dehumidifier 80b and the relay 60. Specifically, the distance between the second electrolytic dehumidifier 80b and the second inductor 30b can be the distance from the center of the second electrolytic dehumidifier 80b to the center of the second inductor 30b; and the distance between the second electrolytic dehumidifier 80b and the relay 60 can be the distance from the center of the second electrolytic dehumidifier 80b to the center of the relay 60. The higher temperature near the second inductor 30b can accelerate the evaporation of water around the second inductor 30b, speeding up the contact of water vapor with the second electrolytic dehumidifier 80b and improving the efficiency of electrolytic dehumidification.

[0045] For example, the second inductor 30b and the Hall sensor 70 are arranged at intervals along the third direction Z. The second inductor 30b and the Hall sensor 70 are both located on the side of the relay 60 away from the first inductor 30a. The Hall sensor 70 is close to the second electrolytic dehumidifier 80b, and the Hall sensor 70 is a magnetic device that generates a lot of heat. The high temperature near the Hall sensor 70 can accelerate water evaporation, which is beneficial to increase the rate at which water vapor enters the second electrolytic dehumidifier 80b, thereby improving the electrolytic dehumidification effect.

[0046] In one embodiment, the power converter 100 accelerates the flow of air within the chamber 11 using the aforementioned fan 90. The fan 90 is primarily positioned near the first inductor 30a. In another embodiment, another fan 90 may be positioned near the second inductor 30b to accelerate the flow of air around the second inductor 30b. The fan 90 at the second inductor 30b may be positioned opposite the second inductor 30b along the first direction X, with the fan 90 blowing air directly toward the second inductor 30b.

[0047] Please combine Figure 6 , Figure 6A structural schematic diagram of the first and second electrolytic dehumidifiers 80a and 80b is provided for an embodiment of the present application. The first and second electrolytic dehumidifiers 80a and 80b each include an electrolytic dehumidification plate 81, an electrolytic control unit 82, an oxygen concentration sensor 83, and a temperature and humidity sensor 84, wherein the first surface is a surface of the electrolytic dehumidification plate 81 of the first electrolytic dehumidifier 80a located inside the cavity 11, and the second surface is a surface of the electrolytic dehumidification plate 81 of the first electrolytic dehumidifier 80a located outside the shell 10. Similarly, the third surface is a surface of the electrolytic dehumidification plate 81 of the second electrolytic dehumidifier 80b located inside the cavity 11, and the fourth surface is a surface of the electrolytic dehumidification plate 81 of the second electrolytic dehumidifier 80b located outside the shell 10. The electrolytic dehumidification plate 81 is used to electrolyze the water vapor in the cavity 11 to generate hydrogen ions and hydroxide ions, the hydroxide ions are decomposed into hydrogen ions and oxygen under the action of the electrolytic dehumidification plate 81, and the hydrogen ions can combine with the oxygen outside the shell 10 to generate water. The electrolytic control unit 82 can be electrically connected with the circuit board 20 to realize power supply, and the electrolytic control unit 82 is electrically connected to the positive and negative electrodes of the electrolytic dehumidification plate 81, and can control the power supply voltage and current of the electrolytic dehumidification plate 81. The oxygen concentration sensor 83 and the temperature and humidity sensor 84 are electrically connected with the electrolytic control unit 82, wherein the oxygen concentration sensor 83 is used to detect the oxygen concentration in the cavity 11, and the temperature and humidity sensor 84 is used to detect the temperature and humidity in the cavity 11. The electrolytic control unit 82 can be used to adjust the power supply voltage and current of the electrolytic dehumidification plate 81 according to the humidity in the cavity 11 detected by the temperature and humidity sensor 84, to realize optimal and rapid dehumidification, and at the same time, realize energy-saving, efficient and rapid dehumidification.

[0048] Specifically, the electrolytic dehumidification plate 81 includes an electrolyte membrane 811, an anode catalyst layer 812, an anode diffusion layer 813, a cathode catalyst layer 814, and a cathode diffusion layer 815. The electrolyte membrane 811 is used to transmit hydrogen ions. The anode catalyst layer 812 and the anode diffusion layer 813 are sequentially stacked on a surface of the electrolyte membrane 811 facing the cavity 11, and the anode catalyst layer 812 is used to decompose the hydroxide ions generated by electrolysis into hydrogen ions and oxygen. The anode diffusion layer 813 is conducive to gas conduction. The cathode catalyst layer 814 and the cathode diffusion layer 815 are sequentially stacked on a surface of the electrolyte membrane 811 away from the anode catalyst layer 812, and the cathode catalyst layer 814 is used to combine the hydrogen ions transmitted through the electrolyte membrane 811 with the oxygen outside the shell 10 to generate water. The cathode diffusion layer 815 is conducive to gas conduction, which is conducive to the uniform diffusion of oxygen in the air outside the shell 10 to the cathode catalyst layer 814, accelerates the combination rate of hydrogen ions and oxygen, and thus improves the dehumidification efficiency.

[0049] As Figure 5As shown, in one embodiment, the housing 10 is provided with an exhaust valve 15, which connects the chamber 11 with the outside of the housing 10 and discharges oxygen in the chamber 11 out of the housing 10. The oxygen concentration in the chamber 11 is detected by the deployed oxygen concentration sensor 83. When the oxygen concentration in the chamber 11 is too high, the exhaust valve 15 is controlled to open to exhaust oxygen, thereby preventing oxygen accumulation in the chamber 11.

[0050] Please combine Figure 7 , Figure 7 A schematic diagram illustrating a structure in which a fan 85 is provided in a first electrolytic dehumidifier 80a and a second electrolytic dehumidifier 80b according to an embodiment of the present application. In one embodiment, the first electrolytic dehumidifier 80a and the second electrolytic dehumidifier 80b each include a fan 85. The fan 85 is fixedly connected to the housing 10 and spaced relative to the electrolytic dehumidification plate 81. The installation position of the fan 85 is determined by the installation position of the electrolytic dehumidification plate 81.

[0051] A fan 85 is provided on the side of the electrolytic dehumidification plate 81 facing the chamber 11 or on the side of the electrolytic dehumidification plate 81 facing away from the chamber 11, and the air outlet direction of the fan 85 is toward the electrolytic dehumidification plate 81. A fan 85 is provided on the side of the electrolytic dehumidification plate 81 facing the chamber 11; or, a fan 85 is provided on the side of the electrolytic dehumidification plate 81 facing away from the chamber 11. The fan 85 located in the chamber 11 is used to extract water vapor in the chamber 11 and accelerate the rate at which water vapor in the chamber 11 contacts the electrolytic dehumidification plate 81. The fan 85 located outside the shell 10 is used to extract oxygen outside the shell 10, accelerate the rate at which oxygen outside the shell 10 combines with hydrogen ions, and improve the efficiency of electrolytic dehumidification. In other embodiments, the electrolytic dehumidifier can also be a device with built-in fans 85 integrated on both sides. For example, fans 85 are provided on both the side of the electrolytic dehumidification plate 81 facing the chamber 11 and the side of the electrolytic dehumidification plate 81 facing away from the chamber 11.

[0052] The fan 85 integrated in the electrolytic dehumidifier creates turbulence, accelerating the flow of air in the electrolytic dehumidifier, strengthening and accelerating the dehumidification process, and thus improving the dehumidification efficiency of the electrolytic dehumidifier plate 81. In addition, when the fan 85 and the blower 90 are not running, the electrolytic dehumidifier plate 81 can achieve low-speed and silent dehumidification.

[0053] The first electrolytic dehumidifier 80a and the second electrolytic dehumidifier 80b of the present application are powered by low voltage, and the voltage can be as low as 3V to work, and the electrolytic dehumidifier can be safe, without moving parts, and occupies a small space in the chamber 11 or does not occupy the effective space of the chamber 11; the electrolytic dehumidifier plate 81 has a long life characteristic, which extends the service life of the first electrolytic dehumidifier 80a and the second electrolytic dehumidifier 80b.

[0054] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A power converter, characterized in that: The power converter is used to convert direct current from a photovoltaic module or an energy storage battery into alternating current, and the power converter includes a housing and a first electrolytic dehumidifier; The housing is formed with a chamber; The first electrolytic dehumidifier is embedded in the shell. The first electrolytic dehumidifier includes a first surface and a second surface arranged opposite to each other. The first surface is located in the chamber, and the second surface is located outside the shell. The first electrolytic dehumidifier is used to electrolyze the water vapor in the chamber to generate hydrogen ions and hydroxide ions. The hydroxide ions are decomposed into hydrogen ions and oxygen under the action of the first electrolytic dehumidifier. The hydrogen ions can pass through the first electrolytic dehumidifier and combine with the oxygen outside the shell to generate water.

2. The power converter according to claim 1, wherein: The power converter further includes a circuit board, a first inductor, and a relay. The circuit board, the first inductor, and the relay are all housed in the chamber. The housing includes a bottom plate, a cover plate, and a side plate. The bottom plate and the cover plate are stacked along a first direction, and the side plate connects the edges of the cover plate and the bottom plate. The circuit board and the cover plate are arranged opposite to each other along the first direction. The relay and the first inductor are both arranged on a side of the circuit board facing the cover plate. The first inductor and the first electrolytic dehumidifier are located on the same side of the relay along a second direction, and the second direction is perpendicular to the first direction; along the second direction, the distance between the first electrolytic dehumidifier and the first inductor is smaller than the distance between the first electrolytic dehumidifier and the relay.

3. The power converter according to claim 2, wherein: When the power converter is mounted on the support, the first direction is perpendicular to the direction of gravity, and the first electrolytic dehumidifier is installed above the middle of the cover along the direction of gravity.

4. The power converter according to claim 2, wherein: When the power converter is mounted on the support, the first direction is perpendicular to the direction of gravity, and the first electrolytic dehumidifier is installed on the side panel farthest from the ground along the direction of gravity.

5. The power converter according to claim 4, characterized in that The power converter also includes a fan, which is accommodated in the chamber. The fan and the first electrolytic dehumidifier are located on the side of the circuit board facing the first inductor. The fan is used to accelerate the air flow around the first inductor so that water vapor is blown toward the first electrolytic dehumidifier.

6. The power converter according to claim 5, characterized in that Along the first direction, the fan is located on the side of the first inductor away from the circuit board and is arranged opposite to the first inductor, and the first electrolytic dehumidifier is located on the side of the fan along the first direction toward the circuit board; the air outlet direction of the fan is toward the first inductor.

7. The power converter according to any one of claims 2 to 6, characterized in that: The power converter also includes a transformer, the first inductor and the transformer are both located on the same side of the relay along the second direction, the first inductor and the transformer are arranged in sequence along a third direction, and the third direction, the first direction and the second direction are perpendicular to each other.

8. The power converter according to any one of claims 1 to 7, characterized in that: The first electrolytic dehumidifier includes an electrolytic dehumidification plate and a fan, both of which are connected and fixed to the shell. The fan is provided on the side of the electrolytic dehumidification plate facing the chamber or on the side of the electrolytic dehumidification plate away from the chamber, and the air outlet direction of the fan is toward the electrolytic dehumidification plate.

9. The power converter according to claim 8, characterized in that The power converter further includes an oxygen concentration sensor and an exhaust valve. The oxygen concentration sensor is used to detect the oxygen concentration in the chamber. The exhaust valve is provided on the shell and is used to connect the chamber with the outside of the shell and discharge the oxygen in the chamber to the outside of the shell.

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