CN219372291U - Photovoltaic inverter casing seal structure - Google Patents

Abstract

The utility model discloses a photovoltaic inverter shell sealing structure, which belongs to the field of inverters and comprises a front cover, a rear cover and an inverter shell; the front cover, the inverter shell and the rear cover are sequentially arranged from top to bottom; a sealing gasket is arranged between the front cover and the inverter shell; the sealing gasket comprises an inner annular surface and an outer annular surface; the periphery of the front cover and the installation matching part of the inverter shell form a concave bud sealing surface; a sealing convex surface is formed on the sealing gasket; the sealing convex surface is abutted with the inner plane of the front cover; a first bulge and a second bulge are formed on the upper end surface of the sealing gasket; the first bulge and the second bulge are respectively arranged at the inner ring surface and the outer ring surface, so that two linear sealing structures are formed, and the sealing effect is improved; the sealing effect is improved through the double-line sealing structure of the sealing gasket.

Description

Photovoltaic inverter casing seal structure

Technical Field

The utility model relates to the field of inverters, in particular to a photovoltaic inverter shell sealing structure.

Background

The inverter is a converter for converting direct current electric energy (a battery and an accumulator jar) into constant-frequency constant-voltage or frequency-modulation voltage-regulation alternating current. The inverter comprises an inverter bridge, control logic and a filter circuit. Is widely applicable to ground power stations, desert power stations, centralized power stations, roof photovoltaic power generation systems, distributed household roof power stations and the like

In order to improve the sealing performance of the shell for the waterproof, dampproof and dustproof inverter, the sealing of the shell is generally realized by a sealing gasket between a cover body of the shell and the shell in the prior art, the sealing gasket widely used at present is U-shaped and is not integral, and after the inverter is installed, the sealing gasket is connected into a whole at the joint by adopting a hot melting mode, thus the inverter belongs to single-wire sealing; the sealing gasket is complex to install, can not be repeatedly used, needs to be replaced regularly, and has damaged elasticity after long-time use, so that the inverter is difficult to obtain obvious waterproof, dampproof and dustproof effects.

Along with the increase of the voltage and the power of the photovoltaic inverter, the sealing requirement of the inverter on the shell is gradually increased. In the string-type high-voltage photovoltaic inverter, the dc voltage at the inverter input side reaches 400V, and dust penetrating into the inverter case may cause high-voltage discharge, causing inverter malfunction. For this purpose, the photovoltaic inverter housing is sealed sufficiently high, i.e. completely resistant to dust penetration, and provides short-term water immersion protection.

The pressure change exists in the inverter shell under the influence of the working heat of the inverter. The existing single-wire type sealing structure inevitably has a sealing contact gap. When the pressure inside the housing is lower than the ambient pressure, the air-borne dust passes through the seal contact slit and enters the inside of the inverter. Therefore, the existing single-wire sealing structure cannot completely prevent dust from penetrating, and has poor sealing effect.

Disclosure of Invention

Aiming at the problems in the prior art, the utility model aims to provide a photovoltaic inverter shell sealing structure, which increases the sealing effect through a sealing gasket double-wire type sealing structure.

In order to solve the problems, the utility model adopts the following technical scheme.

A photovoltaic inverter housing sealing structure comprises a front cover, a rear cover and an inverter housing; the front cover, the inverter housing and the rear cover are sequentially installed from top to bottom; the method is characterized in that: a sealing gasket is arranged between the front cover and the inverter shell; the gasket comprises an inner annulus and an outer annulus; the front cover is provided with a concave bud sealing surface close to the end face of the inverter; a sealing convex surface is formed on the sealing gasket; the sealing convex surface is abutted with the concave bud sealing surface; a first bulge and a second bulge are formed on the upper end surface of the sealing gasket; the first bulge and the second bulge are respectively arranged at the inner ring surface and the outer ring surface.

The first protruding part and the second protruding part are contacted with the front cover and the inverter shell surface to form double-line type sealing, so that the sealing effect is improved. The bulge is small in contact area with the front cover and the inverter shell, so that the pressure intensity received by the first bulge and the second bulge is increased under the same pressure, the first bulge and the second bulge are easier to deform, namely are easier to compress, and the sealing gasket is more compact with the front cover and the inverter shell, so that the sealing effect is further improved. The two linear sealing lines form a labyrinth structure, so that dust particles cannot pass through the dust containing area.

Preferably, a limiting part is formed at the sealing surface of the concave bud; a third protruding part is formed on the sealing convex surface; the third bulge comprises a linear sealing structure and a curved sealing structure; a limit opening is formed at the curved sealing structure; the number, shape and position of the limiting ports are matched with those of the limiting parts; the limiting part is inserted into the limiting opening so that the sealing gasket is in limiting installation relative to the front cover.

Through the arrangement of the limiting part and the limiting hole, the sealing convex surface on the sealing gasket can be better ensured to be bonded with the concave bud sealing surface at the front cover to obtain limiting; the sealing effect of sealing pad and protecgulum can further be increased in the setting of third bulge, and third bulge has contained circular seal structure in addition to circular seal structure department forms spacing hole, and spacing hole and spacing portion match, can form one deck seal around spacing portion through circular seal structure, further increase retaining member peripheral sealed effect.

Preferably, a plurality of through holes are formed at the inverter case; the through holes are matched with the limiting ports in position; a through groove is formed in the limiting part; the through groove is matched with the through hole in shape; the through groove and the through hole are penetrated and provided with locking pieces so as to fix the front cover, the sealing gasket and the inverter shell together. The front cover, the sealing gasket and the inverter shell can be tightly pressed together through the locking piece, so that the pressure between the front cover and the sealing gasket is increased, the deformation degree of the first bulge part, the second bulge part and the third bulge part is enhanced, and the sealing performance is further improved;

a junction box is formed on the inverter housing; the rear cover is provided with honeycomb-shaped heat dissipation grids; the bottom plane of the inverter shell is provided with a plurality of reinforcing ribs, and the reinforcing ribs are distributed on the bottom plane of the inverter shell.

The radiator mounting holes and the inductor shell mounting holes are provided with the plurality of reinforcing ribs at the periphery, so that the strength of the whole shell is enhanced, meanwhile, the stress of a plate surface is effectively dispersed and eliminated, the flatness of the radiator and the inductor shell mounting surface is improved, the sealing performance is further improved when the radiator and the inductor shell are mounted, the effects in water resistance, moisture resistance and dust resistance are more remarkable, and therefore, the product is ensured to be more reliable in the use process; the sealing gasket fixing holes are matched with the buckles on the sealing gasket, so that the phenomena of offset, dislocation and the like can not occur when the sealing gasket is installed and fixed on the shell.

Compared with the prior art, the utility model has the advantages that:

1. the sealing effect is improved through the double-line sealing structure of the sealing gasket.

2. The sealing gasket is integrally pressed and formed, can be repeatedly used, is free from elastic damage after long-time use, and effectively prolongs the service life.

3. The arrangement of the first protruding part, the second protruding part and the third protruding part forms a double-line type sealing structure, and meanwhile, the periphery of the locking piece adopts a circular sealing structure, so that the sealing effect is further improved.

4. Through the setting of spacing portion and spacing hole, deformation when having effectively controlled sealed pad locking has better assurance holistic sealing performance.

5. The bottom plane of the inverter shell is provided with a plurality of reinforcing ribs, so that the strength and the rigidity of the panel are improved; effectively disperses and has eliminated the stress of face, has improved the roughness of face greatly, when installation inductance shell and radiator, has promoted sealing performance, and the effect is more showing in waterproof, dampproofing, dustproof.

Drawings

FIG. 1 is a schematic overall structure of the present utility model;

FIG. 2 is a schematic view of the overall explosive construction of the present utility model;

FIG. 3 is a schematic view of a gasket of the present utility model;

FIG. 4 is an enlarged view of FIG. 3A in accordance with the present utility model;

FIG. 5 is a schematic view of the front cover of the present utility model;

FIG. 6 is an enlarged view of B of FIG. 5 in accordance with the present utility model;

fig. 7 is a schematic structural view of the rear cover of the present utility model.

The reference numerals in the figures illustrate:

1. a front cover; 2. a rear cover; 3. an inverter case; 31. a through hole; 32. abutting against the plane; 5. an inductor housing mounting area; 6. a radiator mounting area; 4. a junction box; 7. a sealing gasket; 71. an inner annulus; 72. an outer annulus; 73. a first projection; 74. a second projection; 75. a limit part; 76. a linear sealing structure; 77. a curved sealing structure; 8. reinforcing ribs.

Detailed Description

Example 1:

referring to fig. 1 to 7, a photovoltaic inverter housing sealing structure includes a front cover 1, a rear cover 2, and an inverter housing 3; the front cover 1, the inverter housing 3 and the rear cover 2 are sequentially installed from top to bottom; the inverter case 3 is formed with a junction box 4, and the junction box 4 is mounted on one side surface of the inverter case 3.

A sealing gasket 7 is arranged between the front cover 1 and the inverter housing 3; the sealing gasket 7 is made of rubber material; the front cover 1 is provided with a concave bud sealing surface near the end face of the inverter; the gasket 7 comprises an inner annular surface 71 and an outer annular surface 72; the thickness of the gasket 7 increases gradually from the outer annular surface 72 toward the inner annular surface 71 to form a convex sealing surface; the sealing convex surface is abutted with the concave bud sealing surface and part of the inner plane of the front cover; the sealing convex surface is at the upper end face of the sealing gasket 7, a first protruding part 73 is formed on the sealing convex surface, a second protruding part 74 is formed near the first protruding part 73, the first protruding part 73 and the second protruding part 74 are both fixed with the sealing gasket 7, and the first protruding part 73 and the second protruding part 74 are respectively arranged at the inner annular surface 71 and the outer annular surface 72.

Specifically, a limiting part 75 is formed at the sealing surface of the concave bud; the limiting part 75 is a raised cylindrical structure, and a third protruding part is formed on the sealing convex surface; the third projection comprises a linear seal 76 and a circular seal 77; the shape of the linear seal structure 76, the first projecting portion 73 and the second projecting portion 74 is similar to the shape of the inner annular surface 71 of the gasket 7; a limiting hole is formed at the circular sealing structure 77, penetrates through the sealing gasket 7, and is surrounded by the circular sealing structure 77, the first protruding part 73 and the second protruding part 74; the number, shape and position of the limit holes are matched with those of the limit parts 75; the limit part 75 corresponds to the limit hole to limit the installation of the sealing gasket 7 relative to the front cover 1. A plurality of through holes 31 are formed at the inverter case 3; the positions of the through holes 31 are matched with those of the limiting holes; the limiting portion 75 has a concave bud formed therein; the concave bud is matched with the shape of the through hole 31; locking pieces are provided through the recess and the through hole 31 to fix the front cover 1, the gasket 7 and the inverter case 3 together. The front cover 1, the gasket 7 and the inverter case 3 can be tightly pressed together by the locking member, so that the pressure between the front cover 1 and the gasket 7 is increased, and the degree of deformation of the first, second and third protrusions is increased. The locking piece is a bolt. The first, second and third projections 73, 74 and 74 are rubber strips.

An abutment plane 32 is formed on the inverter case 3; the abutment plane 32 abuts against the lower end face of the gasket 7; the lower end surface of the gasket 7 is formed with a first contact portion, a second contact portion, and a third contact portion; the first, second and third contact portions are configured and shaped to mate with the first, second and third protrusions 73, 74, respectively.

Specifically, a plurality of reinforcing ribs 8 are formed at the bottom of the inverter housing 3, a plurality of honeycomb-shaped heat dissipation grids are formed at the rear cover 2, an inductor housing mounting area 5 and a radiator mounting area 6 are formed on the inverter housing 3, and the reinforcing ribs 8 can increase the strength and rigidity of the panel; effectively disperses and has eliminated the stress of face, has improved the roughness of face greatly, when installation inductance shell and radiator, has promoted sealing performance, and the effect is more showing in waterproof, dampproofing, dustproof. Thereby ensuring that the product is more reliable in the use process.

Specifically, the sealing gasket 7 is formed by integral pressing, so that the sealing gasket is good in elasticity and sealing effect, can be reused, and does not need to be replaced periodically.

The first protruding part 73, the second protruding part 74 and the third protruding part adopt locking pieces through the concave bracts of the front cover and the through holes of the inverter so as to enable the front cover, the sealing gasket and the inverter shell to be installed together in a limiting mode; the first, second and third protrusions 73, 74 and 74 contact the front cover and the inverter case surface to form a double-wire type seal, increasing the sealing effect. Through the arrangement of the limiting part and the limiting hole, the sealing convex surface on the sealing gasket can be better ensured to be bonded with the concave bud sealing surface at the front cover to obtain limiting; the sealing effect of sealing pad and protecgulum can further be increased in the setting of third bulge, and third bulge has contained circular seal structure in addition to circular seal structure department forms spacing hole, and spacing hole and spacing portion match, can form one deck seal around spacing portion through circular seal structure, further increase retaining member peripheral sealed effect.

Claims (4)

1. A photovoltaic inverter housing sealing structure comprises a front cover (1), a rear cover (2) and an inverter housing (3); the front cover (1), the inverter shell (3) and the rear cover (2) are sequentially installed from top to bottom; the method is characterized in that: a sealing gasket (7) is arranged between the front cover (1) and the inverter shell (3); the gasket (7) comprises an inner annular surface (71) and an outer annular surface (72); the front cover (1) is provided with a concave bud sealing surface close to the end face of the inverter; a sealing convex surface is formed on the sealing gasket (7); the sealing convex surface is abutted with the concave bud sealing surface; a first bulge (73) and a second bulge (74) are formed on the upper end surface of the sealing gasket (7); the first protruding part (73) and the second protruding part (74) are respectively arranged at the inner annular surface (71) and the outer annular surface (72).

2. The photovoltaic inverter housing seal arrangement of claim 1 wherein: a limiting part (75) is formed at the sealing surface of the concave bud; a third protruding part is formed on the sealing convex surface; the third projection comprises a linear seal structure (76) and a curved seal structure (77); a limit opening is formed at the curved sealing structure (77); the number, shape and position of the limit ports are matched with those of the limit parts (75); the limiting part (75) is inserted into the limiting opening so that the sealing gasket (7) is in limiting installation relative to the front cover (1).

3. The photovoltaic inverter housing seal arrangement of claim 2 wherein: a plurality of through holes (31) are formed at the inverter housing (3); the through hole (31) is matched with the position of the limit opening; a through groove is formed in the limit part (75); the through groove is matched with the shape of the through hole (31); the through groove and the through hole (31) are penetrated and provided with locking pieces so as to fix the front cover (1), the sealing gasket (7) and the inverter shell (3) together.

4. The photovoltaic inverter housing seal arrangement of claim 2 wherein: a junction box (4) is formed on the inverter shell (3); a honeycomb-shaped heat dissipation grid is formed on the rear cover (2); a plurality of reinforcing ribs (8) are arranged on the bottom plane of the inverter shell (3), and the reinforcing ribs (8) are distributed on the bottom plane of the inverter shell.