Waterproof and moisture-proof inverter

Abstract

The utility model discloses a waterproof and moisture -proof type inverter, including inverter machine case and setting inverter machine case top water guide top cover, the water guide top cover top half -segment and rear end board all adopt inclined plane processing, inverter machine case front end is provided with the recessed door groove to the back, be provided with the machine case seal outer door in the door groove, through being equipped with a plurality of novel long -term moisture absorption protection devices in inverter machine case rear end, its lengthens the montmorillonite and silica gel mixture in hygroscopic metal pipe, through densely hygroscopic hole high -efficient adsorption internal condensate and trace moisture, long -term control humidity, promote operating stability and life, and the device threaded connection cooperation sealing baffle forms multiple seals, blocks outside moisture, and nut fixed head is convenient for replacing dry granule, reduces maintenance cost, and the interference fit between lengthened hygroscopic metal pipe and outer thread mounting sleeve can prevent leakage, has guaranteed the security and reliability of device long -term use.

Description

Technical Field

[0001] This utility model belongs to the field of power-related technology, specifically relating to a waterproof and moisture-proof inverter. Background Technology

[0002] In outdoor power supply scenarios, inverters, as key devices for converting direct current (DC) to alternating current (AC), directly affect the normal operation of various electrical appliances. However, in outdoor environments, sources of moisture such as rain, dew, and high humidity are constantly present. If this moisture penetrates the inverter's interior, it can severely impact its core components. Components inside the inverter chassis, such as the main control board, power modules, inductors, and capacitors, are extremely sensitive to humidity. When moisture enters, it can easily lead to short circuits, component corrosion and aging, not only reducing the inverter's conversion efficiency but also potentially causing equipment failure and even shortening its lifespan.

[0003] Currently, although traditional inverters have adopted certain waterproof and moisture-proof measures, such as setting up sealed shells and using waterproof sealing rings, they still have shortcomings in long-term outdoor use. For example, a single sealing structure is difficult to completely prevent moisture from entering, especially in environments with large temperature differences between day and night. Condensation is easily generated inside the chassis due to temperature changes. If this condensation is not dealt with in time, it will gradually accumulate and affect the performance of components. The moisture absorption device of some equipment is poorly designed, with low moisture absorption efficiency and is not easy to replace, resulting in a significant decrease in moisture absorption effect over time, and failing to achieve long-term effective internal moisture protection. Utility Model Content

[0004] The purpose of this utility model is to provide a waterproof and moisture-proof inverter to solve the problems mentioned in the background art, such as the difficulty in completely blocking moisture with a single sealed structure, the easy accumulation of condensate inside when there is a large temperature difference affecting the components, the low efficiency of the moisture absorption device of the traditional waterproof and moisture-proof inverter, the inconvenience of replacement, the decay of the moisture absorption effect over time, and the difficulty in providing long-term moisture protection.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a waterproof and moisture-proof inverter, comprising an inverter chassis and a water-guiding top cover installed on the top of the inverter chassis. The front half of the top of the water-guiding top cover and the rear end plate are both treated with bevels. The front end of the inverter chassis is provided with a rearward recessed door groove, in which a chassis sealing outer door is installed. The left end of the chassis sealing outer door is rotatably connected to the inverter chassis through multiple hinges. The chassis sealing outer door can be opened at an angle greater than 90 degrees through the hinges. Multiple long-term moisture absorption protection devices are equidistantly arranged from top to bottom inside the inverter chassis near the rear end.

[0006] Preferably, the long-term moisture absorption protection device includes an internal thread sealing and fixing sleeve and an external thread mounting sleeve. The inverter chassis has a reserved hole near the rear end and located on the right side. An internal thread sealing and fixing sleeve is inserted into the reserved hole. The internal thread sealing and fixing sleeve is fixedly connected to the inverter chassis by welding. An external thread mounting sleeve is threadedly inserted into the internal thread sealing and fixing sleeve.

[0007] Preferably, both the internal thread sealing sleeve and the external thread mounting sleeve are made of aluminum alloy. The length of the internal thread sealing sleeve is greater than the thickness of the inverter chassis. The right end of the internal thread sealing sleeve is flush with the outer wall of the right end of the inverter chassis. The length of the external thread mounting sleeve is greater than the length of the internal thread sealing sleeve.

[0008] Preferably, the long-term moisture absorption protection device further includes a sealing baffle and a nut fixing head. The right end of the external threaded mounting sleeve of the nut fixing head is welded with a nut fixing head, and the left end of the nut fixing head is welded with a sealing baffle.

[0009] Preferably, the nut fixing head can drive the external threaded mounting sleeve to rotate clockwise and counterclockwise. After the external threaded mounting sleeve is tightened into the internal threaded sealing fixing sleeve, the sealing baffle can be tightly pressed against the right outer wall of the inverter chassis.

[0010] Preferably, the long-term moisture absorption protection device further includes an extended moisture-absorbing metal tube and moisture-absorbing holes. The extended moisture-absorbing metal tube is inserted into the external threaded mounting sleeve from left to right, and the extended moisture-absorbing metal tube is laterally located inside the inverter chassis near the rear end. The circular outer wall of the extended moisture-absorbing metal tube is densely covered with multiple moisture-absorbing holes at equal intervals.

[0011] Preferably, the extended moisture-absorbing metal tube and the external threaded mounting sleeve are interference-fitted, and the extended moisture-absorbing metal tube is filled with a mixture of montmorillonite and silica gel dry particles.

[0012] Preferably, the inverter chassis is further provided with a sealed inner door near the front opening. The sealed inner door is located behind the sealed outer door. A display screen is provided on the upper side of the center of the front of the sealed inner door, and multiple control buttons are equidistantly arranged below the display screen.

[0013] Preferably, a transparent glass window is connected to the center and the upper interior of the sealed outer door of the chassis, and the transparent glass of the transparent glass window is sealed and fixed to the sealed outer door of the chassis with glass glue. The transparent glass window is located in front of the display screen and multiple control buttons.

[0014] Preferably, the inverter chassis is provided with a metal fixing frame at the bottom, the metal fixing frame is flush with the outer walls of the inverter chassis, and mounting brackets are vertically welded at the four corners of the bottom of the metal fixing frame, and mounting fixing plates are welded to the bottom of the multiple mounting brackets.

[0015] Preferably, multiple wiring terminals are equidistantly arranged at the center of the bottom of the inverter chassis and on its left and right sides. The bottom of the inverter chassis is also provided with a waterproof protective sleeve for the wiring terminals. The waterproof protective sleeve protects the outside of the multiple wiring terminals and is located inside the frame of the metal fixed bottom frame.

[0016] Compared with the prior art, this utility model provides a waterproof and moisture-proof inverter, which has the following features:

[0017] Beneficial effects:

[0018] This invention incorporates multiple novel, long-lasting moisture-absorbing protection devices near the rear of the inverter chassis. These devices utilize a lengthened metal tube filled with a mixture of montmorillonite and silica gel granules. The densely packed pores increase the contact area with the internal air, efficiently absorbing condensation caused by temperature changes and trace amounts of moisture seeping into the sealed gaps. This achieves long-term humidity control, preventing damage to circuit components due to moisture and significantly improving the inverter's operational stability and lifespan in high-humidity outdoor environments. The threaded connection between the internal threaded sealing sleeve and the external threaded mounting sleeve, combined with the tight-fitting design of the sealing baffle, forms multiple sealing barriers, effectively preventing external moisture intrusion. Furthermore, the nut securing the head... The external threaded mounting sleeve can be easily tightened or loosened, facilitating regular replacement of the desiccant without disassembling the entire chassis. This significantly reduces maintenance costs and operational complexity, balancing moisture-proof reliability and practicality. The interference fit between the extended moisture-absorbing metal tube and the external threaded mounting sleeve ensures no leakage of the desiccant, and the chemical stability of the metal material is compatible with the desiccant, preventing material reactions from affecting the moisture absorption effect and ensuring the safety and reliability of the device for long-term use. In addition, the extended moisture-absorbing metal tube is arranged horizontally inside the chassis near the rear end, with multiple devices equidistantly arranged from top to bottom. This fully utilizes the internal unused space and achieves uniform moisture absorption at different heights, further improving the overall waterproof and moisture-proof rating of the inverter and meeting the needs of use in harsh outdoor environments. Attached Figure Description

[0019] Figure 1 This is a front-view three-dimensional structural diagram of a waterproof and moisture-proof inverter according to the present invention.

[0020] Figure 2 This is a front view schematic diagram of a waterproof and moisture-proof inverter according to the present invention.

[0021] Figure 3 This is a right-view plan view of a waterproof and moisture-proof inverter according to the present invention.

[0022] Figure 4 This is a partial three-dimensional structural diagram of the long-term moisture absorption protection device of this utility model.

[0023] Figure 5 This is a schematic diagram of the overall three-dimensional disassembly structure of the long-term moisture absorption protection device of this utility model.

[0024] In the diagram: 1. Mounting base plate; 2. Mounting bracket; 3. Metal mounting frame; 4. Sealed outer door of the chassis; 5. Transparent glass window; 6. Water-guiding top cover; 7. Display screen; 8. Control buttons; 9. Inverter chassis; 10. Long-term moisture absorption protection device; 11. Waterproof protective sleeve at the wiring point; 12. Sealing baffle; 13. Nut fixing head; 14. Extended moisture-absorbing metal tube; 15. Moisture absorption hole; 16. Internal thread sealing fixing sleeve; 17. External thread mounting sleeve. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] This utility model provides, for example Figure 1-5 The waterproof and moisture-proof inverter shown here has the core function of converting direct current (DC) (such as the power output from a battery or solar panel) into alternating current (AC) for use by outdoor electrical equipment. Its working principle mainly involves the coordinated action of internal rectifier circuits, filter circuits, inverter bridges, and control circuits. First, the DC power is processed into a stable DC signal, and then the inverter bridge converts the DC signal into AC power of a specific frequency and voltage. The inverter includes an inverter chassis 9 and a water-guiding top cover 6 mounted on top of the inverter chassis 9. The main components inside the inverter chassis 9 include a main control board (integrated circuit board). The system consists of microprocessors, drive circuits, etc., responsible for regulating the entire inverter process; power modules (such as IGBTs or MOSFETs, which undertake the core task of power conversion); inductors, capacitors (used for filtering, stabilizing current and voltage); heat sinks (to dissipate heat from power modules and other heat-generating components); relays (to control the on / off state of the circuit); etc. The top front half and rear end plates of the water-guiding top cover 6 are both treated with slopes. The advantage of this design is that it can use gravity to quickly drain rainwater, preventing rainwater from accumulating in the top cover and seeping into the chassis. This physical barrier method enhances the waterproof foundation of the equipment.

[0027] like Figure 1 , Figure 2 and Figure 3As shown, the inverter chassis 9 has a recessed door groove at the front, in which a sealed outer door 4 is installed. The left end of the sealed outer door 4 is rotatably connected to the inverter chassis 9 via multiple hinges. The sealed outer door 4 can be opened to an angle greater than 90 degrees via the hinges. The large opening angle facilitates the operator's inspection and maintenance of the internal components of the chassis. The hinge connection ensures the stability of the connection between the outer door and the chassis. Near the front opening of the inverter chassis 9, there is also a sealed inner door, located behind the sealed outer door 4. The double-door structure provides double protection, which is more effective in blocking external moisture and dust from entering compared to a single door. The principle of increasing the number of barrier layers improves the moisture and dust prevention effect. A display screen 7 is installed on the upper side of the center of the inverter (used to display information such as output voltage, current, power, and operating status, so that users can monitor the inverter's operation in real time). Multiple control buttons 8 are equidistantly arranged below the display screen 7 (for users to perform operations such as power on / off and mode switching). A transparent glass window 5 is connected to the center and the upper side of the sealed outer door 4 of the chassis. The transparent glass of the transparent glass window 5 is sealed and fixed to the sealed outer door 4 of the chassis with glass glue. The transparent glass window 5 is located in front of the display screen 7 and the multiple control buttons 8. The transparent glass window 5 does not affect the user's observation of the information on the display screen 7 and operation of the control buttons 8. The glass glue seal can also prevent rainwater from seeping in from the window gaps, ensuring both operational convenience and waterproof performance.

[0028] like Figure 1 , Figure 2 and Figure 3 As shown, a metal fixing frame 3 is provided at the bottom of the inverter chassis 9. The metal fixing frame 3 is flush with the outer walls of the inverter chassis 9. Mounting brackets 2 are vertically welded to the four corners of the bottom of the metal fixing frame 3. Each mounting bracket 2 has a mounting base plate 1 welded to its bottom. The metal fixing frame 3 enhances the overall structural strength of the inverter. The mounting brackets 2 and mounting base plates 1 securely install the inverter on the ground or other supports, preventing the equipment from shifting due to external impacts. Simultaneously, raising the bottom of the chassis reduces the possibility of ground moisture directly corroding the bottom of the chassis. The inverter chassis 9 has multiple terminals (for connecting the input DC power and output AC power) equidistantly arranged at the center of the bottom and on both sides. The bottom of the inverter chassis 9 is also equipped with a waterproof protective sleeve 11 for the terminals. The waterproof protective sleeve 11 protects the outside of the multiple terminals and is located inside the frame of the metal fixed bottom frame 3. The terminals are the weakest point in waterproofing. The waterproof protective sleeve can isolate the terminals from external rainwater and moisture. The principle of wrapping and protecting the terminals prevents short circuit faults caused by moisture in the wiring parts.

[0029] like Figure 1 , Figure 4 and Figure 5As shown, multiple long-term moisture absorption protection devices 10 are equidistantly arranged from top to bottom inside the inverter chassis 9 near the rear end. Each long-term moisture absorption protection device 10 includes an internally threaded sealing sleeve 16 and an externally threaded mounting sleeve 17. A pre-drilled hole is located inside the inverter chassis 9 near the rear end and on the right side. An internally threaded sealing sleeve 16 is inserted into the pre-drilled hole and is fixedly connected to the inverter chassis 9 by welding. An externally threaded mounting sleeve 17 is threaded into the internally threaded sealing sleeve 16. Both the internally threaded sealing sleeve 16 and the externally threaded mounting sleeve 17 are made of aluminum alloy (aluminum alloy is corrosion-resistant, high-strength, and suitable for outdoor environments). The length of the internally threaded sealing sleeve 16 is greater than the thickness of the inverter chassis 9. The right end of the internally threaded sealing sleeve 16 is flush with the outer wall of the right end of the inverter chassis 9. The length of 7 is greater than the length of the internal thread sealing sleeve 16. The threaded connection method makes the external thread mounting sleeve 17 and the internal thread sealing sleeve 16 fit tightly together, which can effectively prevent external moisture from entering through the reserved hole. At the same time, it is easy to install and disassemble. The long-term moisture absorption protection device 10 also includes a sealing baffle 12 and a nut fixing head 13. The nut fixing head 13 is welded to the right end of the external thread mounting sleeve 17, and the sealing baffle 12 is welded to the left end of the nut fixing head 13. The nut fixing head 13 can drive the external thread mounting sleeve 17 to rotate clockwise and counterclockwise. After the external thread mounting sleeve 17 is tightened into the internal thread sealing sleeve 16, the sealing baffle 12 can be tightly pressed against the right outer wall of the inverter chassis 9. The sealing baffle 12 further enhances the sealing of the connection. By squeezing and pressing, it fills any gaps that may exist and prevents moisture from entering.

[0030] like Figure 1 , Figure 4 and Figure 5 As shown, the long-term moisture absorption protection device 10 also includes an extended moisture-absorbing metal tube 14 and moisture-absorbing holes 15. The extended moisture-absorbing metal tube 14 is inserted into the external threaded mounting sleeve 17 from left to right, and the extended moisture-absorbing metal tube 14 is laterally located inside the inverter chassis 9 near the rear end. The circular outer wall of the extended moisture-absorbing metal tube 14 is densely covered with multiple moisture-absorbing holes 15 at equal intervals. There is an interference fit between the extended moisture-absorbing metal tube 14 and the external threaded mounting sleeve 17 (the interference fit ensures the tightness of the connection between the two and prevents desiccant leakage). The extended moisture-absorbing metal tube 14 is filled with a mixture of montmorillonite and silica gel desiccant particles. The moisture-absorbing holes 15 can increase the contact area between the desiccant and the air inside the chassis. The mixture of montmorillonite and silica gel desiccant particles can adsorb condensate and trace amounts of moisture generated inside the chassis due to temperature changes. The dry environment inside the chassis is maintained by chemical adsorption, which avoids the main control board, power module and other components inside from being affected or damaged by moisture. The equidistant arrangement of multiple devices can ensure uniform moisture absorption effect in different areas inside the chassis.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A waterproof and moisture-proof inverter, comprising an inverter chassis (9) and a water-guiding top cover (6) disposed on the top of the inverter chassis (9), wherein the front half of the top and the rear end plate of the water-guiding top cover (6) are both beveled, the front end of the inverter chassis (9) is provided with a rearward recessed door groove, and a chassis sealing outer door (4) is disposed in the door groove, the left end of the chassis sealing outer door (4) is rotatably connected to the inverter chassis (9) by multiple hinges, and the chassis sealing outer door (4) can be opened at an angle greater than 90 degrees by the hinges, characterized in that: The inverter chassis (9) is equipped with multiple long-term moisture absorption protection devices (10) arranged at equal intervals from top to bottom near the rear end of the interior; The long-term moisture absorption protection device (10) includes an internal thread sealing and fixing sleeve (16) and an external thread mounting sleeve (17). The inverter chassis (9) has a reserved hole near the rear end and located on the right side. The internal thread sealing and fixing sleeve (16) is inserted into the reserved hole. The internal thread sealing and fixing sleeve (16) is fixedly connected to the inverter chassis (9) by welding. The external thread mounting sleeve (17) is threaded into the internal thread sealing and fixing sleeve (16).

2. The waterproof and moisture-proof inverter according to claim 1, characterized in that: Both the internal thread sealing sleeve (16) and the external thread mounting sleeve (17) are made of aluminum alloy. The length of the internal thread sealing sleeve (16) is greater than the thickness of the inverter chassis (9). The right end of the internal thread sealing sleeve (16) is flush with the outer wall of the right end of the inverter chassis (9). The length of the external thread mounting sleeve (17) is greater than the length of the internal thread sealing sleeve (16).

3. A waterproof and moisture-proof inverter according to claim 2, characterized in that: The long-term moisture absorption protection device (10) also includes a sealing baffle (12) and a nut fixing head (13). The right end of the external threaded mounting sleeve (17) is welded with a nut fixing head (13), and the left end of the nut fixing head (13) is welded with a sealing baffle (12).

4. A waterproof and moisture-proof inverter according to claim 3, characterized in that: The nut fixing head (13) can drive the external thread mounting sleeve (17) to rotate clockwise and counterclockwise. After the external thread mounting sleeve (17) is tightened into the internal thread sealing fixing sleeve (16), the sealing baffle (12) can be pressed tightly against the right outer wall of the inverter chassis (9).

5. A waterproof and moisture-proof inverter according to claim 4, characterized in that: The long-term moisture absorption protection device (10) also includes an extended moisture-absorbing metal tube (14) and moisture-absorbing holes (15). The extended moisture-absorbing metal tube (14) is inserted into the external threaded mounting sleeve (17) from left to right, and the extended moisture-absorbing metal tube (14) is located laterally inside the inverter chassis (9) near the rear end. The extended moisture-absorbing metal tube (14) has multiple moisture-absorbing holes (15) evenly distributed on its circular outer wall.

6. A waterproof and moisture-proof inverter according to claim 5, characterized in that: The extended moisture-absorbing metal tube (14) is interference-fitted with the external threaded mounting sleeve (17), and the extended moisture-absorbing metal tube (14) is filled with a mixture of montmorillonite and silica gel dry particles.

7. A waterproof and moisture-proof inverter according to claim 1, characterized in that: The inverter chassis (9) is also provided with a sealed inner door near the front opening. The sealed inner door is located behind the sealed outer door (4). A display screen (7) is provided on the upper side of the center of the front end of the sealed inner door. Multiple control buttons (8) are equidistantly arranged below the display screen (7).

8. A waterproof and moisture-proof inverter according to claim 7, characterized in that: A transparent glass window (5) is connected to the center and the upper side of the sealed outer door (4) of the chassis. The transparent glass of the transparent glass window (5) is sealed and fixed to the sealed outer door (4) of the chassis with glass glue. The transparent glass window (5) is located in front of the display screen (7) and multiple control buttons (8).

9. A waterproof and moisture-proof inverter according to claim 1, characterized in that: The inverter chassis (9) is provided with a metal fixed bottom frame (3) at the bottom. The metal fixed bottom frame (3) is flush with the outer walls of the inverter chassis (9) on all four sides. The four corners of the bottom of the metal fixed bottom frame (3) are vertically welded with mounting brackets (2). The bottom of the multiple mounting brackets (2) is welded with mounting fixed base plates (1).

10. A waterproof and moisture-proof inverter according to claim 9, characterized in that: The inverter chassis (9) has multiple wiring terminals equidistantly arranged at the center of its bottom end and on its left and right sides. The inverter chassis (9) also has a waterproof protective sleeve (11) for the wiring terminals at its bottom end. The waterproof protective sleeve (11) protects the outside of the multiple wiring terminals and is located inside the frame of the metal fixed bottom frame (3).

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