Sealed shell, inverter and electric power system

Abstract

The utility model provides a sealed housing, an inverter and an electric power system, and relates to the field of electrical technology. The sealing shell comprises an upper shell body and a lower shell body, the lower shell body is provided with a sealing groove, the sealing groove extends in the circumferential direction of the lower shell body, the upper shell body is provided with a sealing plate corresponding to the sealing groove, sealing glue is arranged in the sealing groove, the sealing plate extends into the sealing glue, and an outer glue cavity and an inner glue cavity are formed in the two sides of the sealing plate in the sealing groove respectively. A mounting cavity is defined by the upper shell and the lower shell; the outer glue cavity and the inner glue cavity are correspondingly provided with an outer glue overflowing part and an inner glue overflowing part respectively, the resistance loss corresponding to the outer glue cavity is larger than the resistance loss corresponding to the inner glue cavity due to the structural arrangement of the sealing groove and the sealing plate, and the resistance loss is mechanical energy consumed when the sealant of unit weight flows to the corresponding glue overflowing part in the corresponding glue cavity. According to the utility model, the possibility that the sealant overflows to the outer surfaces of the upper shell and the lower shell through the sealant overflow part and the sealant overflow amount can be reduced, and the assembly efficiency of the sealing shell can be improved.

Description

Technical Field

[0001] The utility model relates to the field of electrical technology, and in particular to a sealed housing, an inverter and a power system. Background Art

[0002] Inverters are usually exposed to the environment. For example, microinverters are often deployed outdoors. Their use environment is relatively complex. In order to improve the waterproof and dustproof performance of the inverter, sealant is usually provided on the joint surface of the two shells of its shell structure.

[0003] However, the amount of applied sealant is difficult to control precisely, and the sealant may be squeezed onto the outer surface of the shell structure, thereby requiring additional detection and erasing steps for overflow of sealant on the outer surface of the shell to ensure the appearance of the product, which will affect the production efficiency of the inverter. Utility Model Content

[0004] The utility model aims to solve the problem in the related art to a certain extent how to reduce the possibility of the sealant at the joint surface of the upper and lower shells of the sealing shell overflowing to the outer surface of the shell structure.

[0005] In order to solve at least one aspect of the above-mentioned problems to at least a certain extent, in a first aspect, the utility model provides a sealed shell, comprising an upper shell and a lower shell, the lower shell being provided with a sealing groove, the sealing groove extending along the circumference of the lower shell, the upper shell being provided with a sealing plate corresponding to the sealing groove, the sealing groove being provided with sealant, the sealing plate extending into the sealant, an outer seal cavity and an inner seal cavity being respectively formed on both sides of the sealing plate in the sealing groove, and the upper shell and the lower shell being combined to form an installation cavity; the outer seal cavity and the inner seal cavity are respectively provided with an outer overflow seal portion and an inner overflow seal portion, the structural arrangement of the sealing groove and the sealing plate makes the resistance loss corresponding to the outer seal cavity greater than the resistance loss corresponding to the inner seal cavity, wherein the resistance loss is the mechanical energy consumed by the unit weight of the sealant when it flows from the corresponding seal cavity to the corresponding overflow seal portion.

[0006] Optionally, a minimum dimension of the outer rubber cavity in the groove width direction of the sealing groove is smaller than a minimum dimension of the inner rubber cavity in the groove width direction of the sealing groove.

[0007] Optionally, at least one of the sealing groove and the sealing plate at the outer rubber cavity is provided with a rubber blocking structure.

[0008] Optionally, the glue blocking structure includes a set height section, and a surface of the glue blocking structure in the set height section, which is located in the groove width direction of the sealing groove, is arranged to face obliquely upward;

[0009] And / or, when the lower surface of the sealing plate is in contact with the inner bottom surface of the sealing groove, the lower end of the glue retaining structure is spaced apart from the inner bottom surface of the sealing groove;

[0010] And / or, when the lower surface of the sealing plate is in contact with the inner bottom surface of the sealing groove, the upper end of the glue blocking structure is spaced apart from the overflowing glue portion in the up-and-down direction.

[0011] Optionally, a path length of the sealant overflowing through the outer overflowing glue portion of the outer glue cavity is greater than or equal to a path length of the sealant overflowing through the inner overflowing glue portion of the inner glue cavity.

[0012] Optionally, a path for the sealant to overflow through the overflow glue portion of the outer glue cavity includes at least one of an inclined path segment and a curved path segment.

[0013] Optionally, the inner surface of the outer groove wall structure of the sealing groove includes at least one of an inclined section and a curved section in the up and down directions, and the inner surface of the outer groove wall structure of the sealing groove at least in the inclined section of the inclined section is arranged to face obliquely upward.

[0014] Optionally, the position of the external overflow glue portion in the vertical direction is not lower than the position of the internal overflow glue portion in the vertical direction;

[0015] And / or, the top surface of the outer groove wall structure of the sealing groove is used to form the overflowing glue portion;

[0016] And / or, the top surface of the inner groove wall structure of the sealing groove is used to form the inner overflow glue portion.

[0017] Optionally, at least one of the sealing groove and the sealing plate is provided with a recessed structure.

[0018] Optionally, the recessed structure includes at least one of a first recessed portion, a second recessed portion, a third recessed portion and a fourth recessed portion; the first recessed portion is arranged at the outer edge of the lower end of the sealing plate; the second recessed portion is arranged at the inner edge of the lower end of the sealing plate; the third recessed portion is arranged at the inner groove wall structure of the sealing groove; the fourth recessed portion is arranged at the outer groove wall structure of the sealing groove;

[0019] And / or, the recessed structure is extended along the extension direction of the sealing groove.

[0020] Optionally, at least one of the sealing groove and the sealing plate is provided with a rough texture corresponding to the outer rubber cavity;

[0021] And / or, the sealed housing further comprises a plug-in positioning structure, and the upper housing and the lower housing are positioned and connected via the plug-in positioning structure;

[0022] And / or, at least one of the upper shell and the lower shell is provided with a glue injection hole, and the glue injection hole is used to inject glue into the installation cavity.

[0023] In a second aspect, the utility model provides an inverter, comprising the sealed housing as described in the first aspect above.

[0024] In a third aspect, the utility model provides an electric power system, comprising the sealed housing as described in the first aspect above, or comprising the inverter as described in the second aspect above.

[0025] Compared with the related prior art, in the sealed housing, inverter and power system of the utility model, the sealant can be initially positioned by the sealing groove arranged on the lower housing, and then the sealing plate of the upper housing is extended into the sealant, and an outer sealant cavity and an inner sealant cavity are respectively formed on both sides of the sealing plate in the sealing groove. Specifically, in the groove width direction of the sealing groove, the portion between the inner surface of the outer groove wall structure of the sealing groove and the outer surface of the sealing plate constitutes the outer sealant cavity, and the portion between the inner surface of the inner groove wall structure of the sealing groove (i.e., the surface close to the sealing plate) and the inner surface of the sealing plate constitutes the inner sealant cavity. Under the extrusion of the sealing plate, part of the sealant overcomes the resistance provided by the outer sealant cavity and moves toward the overflowing sealant portion, and the other part of the sealant overcomes the resistance provided by the inner sealant cavity and moves toward the overflowing sealant portion. At this time, the outer sealant cavity and the inner sealant cavity can be regarded as pipelines, and the sealing groove and the sealing plate The structural setting makes the resistance loss corresponding to the outer rubber cavity greater than the resistance loss corresponding to the inner rubber cavity, wherein the resistance loss corresponding to the outer rubber cavity is the mechanical energy consumed by a unit weight of sealant when it flows from the outer rubber cavity to the outer overflow rubber portion, and the resistance loss corresponding to the inner rubber cavity is the mechanical energy consumed by a unit weight of sealant when it flows from the inner rubber cavity to the inner overflow rubber portion. Therefore, it is more difficult for the sealant to overflow through the outer overflow rubber portion than through the inner overflow rubber portion. Even if the amount of sealant is too large and there is a risk of overflow, the sealant will overflow from a path that is easier to flow out. In other words, the sealant is also more likely to overflow from the inner overflow rubber portion through the inner rubber cavity, thereby reducing the possibility and amount of sealant overflowing from the outer overflow rubber portion to the outer surfaces of the upper shell and the lower shell, and on the basis of ensuring the sealing performance of the upper shell and the lower shell, the production efficiency of the sealed shell can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the explosion structure of the sealed housing in the first embodiment of the utility model;

[0027] Figure 2 It is a cross-sectional schematic diagram of the connection between the upper shell and the lower shell of the sealing shell in the first embodiment of the utility model;

[0028] Figure 3 It is a cross-sectional schematic diagram of the connection between the upper shell and the lower shell of the sealing shell in the second embodiment of the utility model;

[0029] Figure 4 It is a cross-sectional schematic diagram of the connection between the upper shell and the lower shell when the glue blocking structure includes a set height section in the third embodiment of the utility model;

[0030] Figure 5 It is a cross-sectional schematic diagram of the connection between the upper shell and the lower shell when the inner surface of the outer groove wall structure of the sealing groove and the outer surface of the sealing plate are both inclined in the fourth embodiment of the utility model;

[0031] Figure 6 It is a cross-sectional schematic diagram of the connection between the upper shell and the lower shell when the inner surface of the outer groove wall structure of the sealing groove and the outer surface of the sealing plate in the fifth embodiment of the utility model both include curved sections;

[0032] Figure 7 It is a cross-sectional schematic diagram of the connection between the upper shell and the lower shell in the sixth embodiment of the utility model;

[0033] Figure 8 It is a cross-sectional schematic diagram of the connection between the upper shell and the lower shell in the seventh embodiment of the utility model;

[0034] Fig. 9 It is a cross-sectional schematic diagram of the connection between the upper shell and the lower shell in the eighth embodiment of the utility model.

[0035] Description of reference numerals:

[0036] 1-upper shell; 11-sealing plate; 2-lower shell; 21-sealing groove; 211-outer groove wall structure; 211A-inclined section; 211B-bent section; 212-inner groove wall structure; 213-inner bottom surface; 3-outer rubber cavity; 31-overflow rubber portion; 4-inner rubber cavity; 41-overflow rubber portion; 5-installation cavity; 6-rubber blocking structure; 61-set height section; 7-recessed structure; 71-first recessed portion; 72-second recessed portion; 73-third recessed portion; 74-fourth recessed portion; 8-sealant; 9-wiring harness assembly. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the description of this specification, the description with reference to the terms "embodiment", "one embodiment", "some embodiments", "exemplarily" and "one embodiment" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or embodiment are included in at least one embodiment or embodiment of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or embodiments in a suitable manner.

[0040] The terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0041] In the accompanying drawings, the Z axis represents the vertical direction, that is, the up and down position, and the positive direction of the Z axis (that is, the direction of the arrow of the Z axis) represents the up, and the negative direction of the Z axis represents the down; the X axis in the accompanying drawings represents the front and back position, and the positive direction of the X axis (that is, the direction of the arrow of the X axis) represents the front side, and the negative direction of the X axis represents the back side; the Y axis in the accompanying drawings represents the horizontal direction and is designated as the left and right position, and the positive direction of the Y axis (that is, the direction of the arrow of the Y axis) represents the right side, and the negative direction of the Y axis represents the left side; it should be noted that the aforementioned Z axis, Y axis and X axis are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0042] like Figure 1 and Figure 2 As shown, the utility model provides a sealed shell, including an upper shell 1 and a lower shell 2, the lower shell 2 is provided with a sealing groove 21, the sealing groove 21 is extended along the circumference of the lower shell 2, the upper shell 1 is provided with a sealing plate 11 corresponding to the sealing groove 21, a sealant 8 is provided in the sealing groove 21, the sealing plate 11 extends into the sealant 8, an outer glue cavity 3 and an inner glue cavity 4 are formed on both sides of the sealing plate 11 in the sealing groove 21, the outer glue cavity 3 and the inner glue cavity 4 are respectively provided with an outer overflow glue portion 31 and an inner overflow glue portion 41, the structural arrangement of the sealing groove 21 and the sealing plate 11 makes the resistance loss corresponding to the outer glue cavity 3 greater than the resistance loss corresponding to the inner glue cavity 4, wherein the resistance loss is the mechanical energy consumed by a unit weight of the sealant 8 when it flows from the corresponding glue cavity to the corresponding overflow glue portion.

[0043] Specifically, the sealing groove 21 extends along the circumference of the lower shell 2 and is connected end to end to form an annular groove structure, and accordingly, the sealing plate 11 is arranged to extend in a circle along the circumference of the upper shell 1. The projection of the sealing groove 21 on the horizontal plane (a plane parallel to XY) is an annular structure, which can be rectangular or circular, etc., and is set according to specific needs. In addition, each part of the sealing groove 21 along its extension direction can have a height difference in the up and down direction, which is determined according to actual needs and is not a limitation.

[0044] like Figure 1 and Figure 2 As shown, the upper housing 1 is located above the lower housing 2, and the two are used to enclose the installation cavity 5 and form a relatively complete housing structure. The circuit board assembly of the inverter is installed in the installation cavity 5. In this specification, the description of the upper housing 1 and the lower housing 2 is only used to indicate the position of the two housings in the up and down direction when they are connected by the sealant 8. In actual use, the upper housing 1 is not necessarily located above the lower housing 2. For example, the upper housing 1 and the lower housing 2 can be distributed in sequence along the horizontal direction, which will not be described in detail later.

[0045] It should be understood that as long as the inner bottom surface 213 of the sealing groove 21 and the lower surface of the sealing plate 11 are connected by the sealant 8 to form a sealing surface, the sealing requirements of the joint of the upper shell 1 and the lower shell 2 can be met. However, the amount of sealant 8 is difficult to control accurately, or the cost of accurate control is high. Usually, the amount of sealant 8 is designed to have excess sealant on the basis of forming the above-mentioned sealing surface. When the sealing plate 11 extends into the sealant 8 and contacts the inner bottom surface 213 of the sealing groove 21, the excess sealant 8 will be squeezed and flow to the inner and outer sides of the above-mentioned sealing surface due to the downward pressure of the sealing plate 11, which may cause the risk of excess sealant 8 flowing to the outer surfaces of the upper shell 1 and the lower shell 2.

[0046] When connecting the upper shell 1 and the lower shell 2, first lay the lower shell 2 flat so that the inner bottom surface 213 of the sealing groove 21 is approximately parallel to the XY plane, and then put the sealant 8 into the sealing groove 21. At this time, the depth of the sealant 8 in the sealing groove 21 is determined according to the actual situation, for example, the depth of the glue layer is 0.1-1.5 mm, 0.4-1 mm. Then align the sealing plate 11 of the upper shell 1 with the sealing groove 21, and the upper shell 1 moves from top to bottom. The lower surface of the sealing plate 11 contacts the sealant 8, and pressure is applied to the sealant 8. The sealant 8 is pressurized and moves to the inside and outside along the groove width direction of the sealing groove 21 (the groove width direction is perpendicular to the up and down direction, and perpendicular to the extension direction of the sealing groove 21 in the horizontal plane). During this process, the space between the outer surface of the sealing plate 11 (the surface close to the outside of the sealing shell along the groove width direction of the sealing groove 21, which will not be described in detail later) and the inner surface of the outer groove wall structure 211 of the sealing groove 21 constitutes an outer glue cavity 3, and the space between the inner surface of the sealing plate 11 (the surface close to the inside of the sealing shell along the groove width direction of the sealing groove 21, which will not be described in detail later) and the inner surface of the inner groove wall structure 212 of the sealing groove 21 constitutes an inner glue cavity 4. The sealant 8 is pressurized and flows to the outer glue cavity 3 and the inner glue cavity 4 along the groove width direction of the sealing groove 21.

[0047] Here, the sealant 8 is relatively viscous. For example, in this embodiment, the sealant 8 is made of a single-component room temperature vulcanized silicone rubber with a viscosity of 50,000 and 170,000 mPa·s on the upper shell. When the sealant 8 flows from the outer rubber cavity 3 to the overflowing rubber portion 31, it will contact the surface constituting the outer rubber cavity 3 (specifically, the outer surface of the sealing plate 11 and the inner surface of the outer groove wall structure 211 of the sealing groove 21), and there will be resistance loss. In this process, the flow of the sealant 8 in the outer rubber cavity 3 can be regarded as the flow in the pipeline, and the resistance loss can be approximately understood as the pipeline resistance loss. The resistance loss corresponding to the outer rubber cavity 3 is specifically the mechanical energy consumed by the unit weight of the sealant 8 when it flows from the outer rubber cavity 3 to the overflowing rubber portion 31. Correspondingly, the resistance loss corresponding to the inner rubber cavity 4 is specifically the mechanical energy consumed by the unit weight of the sealant 8 when it flows from the inner rubber cavity 4 to the inner overflowing rubber portion 41. The structural setting of the sealing groove 21 and the sealing plate 11 makes the resistance loss corresponding to the outer rubber cavity 3 greater than the resistance loss corresponding to the inner rubber cavity 4. Under the effect of the above-mentioned resistance loss, it is more difficult for the sealant 8 to overflow through the outer overflow glue portion 31 of the outer rubber cavity 3 than through the inner overflow glue portion 41 of the inner rubber cavity 4.

[0048] In this way, the sealant 8 can be initially positioned by the sealing groove 21 provided on the lower shell 2, and then the sealing plate 11 of the upper shell 1 is extended into the sealant 8, and the outer glue cavity 3 and the inner glue cavity 4 are respectively formed on both sides of the sealing plate 11 in the sealing groove 21. Specifically, in the groove width direction of the sealing groove 21, the portion between the inner surface of the outer groove wall structure 211 of the sealing groove 21 and the outer surface of the sealing plate 11 constitutes the outer glue cavity 3, and the portion between the inner surface of the inner groove wall structure 212 of the sealing groove 21 (i.e., the surface close to the sealing plate 11) and the inner surface of the sealing plate 11 constitutes the inner glue cavity 4. Under the extrusion of the sealing plate 11, part of the sealant 8 overcomes the resistance provided by the outer glue cavity 3 and moves toward the overflow glue portion 31, and the other part of the sealant 8 overcomes the resistance provided by the inner glue cavity 4 and moves toward the overflow glue portion 41. At this time, the outer glue cavity 3 and the inner glue cavity 4 can be regarded as pipelines, and the structural arrangement of the sealing groove 21 and the sealing plate 11 The resistance loss corresponding to the outer glue cavity 3 is greater than the resistance loss corresponding to the inner glue cavity 4, wherein the resistance loss corresponding to the outer glue cavity 3 is the mechanical energy consumed by the unit weight of the sealant 8 when it flows from the outer glue cavity 3 to the outer overflow glue portion 31, and the resistance loss corresponding to the inner glue cavity 4 is the mechanical energy consumed by the unit weight of the sealant 8 when it flows from the inner glue cavity 4 to the inner overflow glue portion 41. Therefore, it is more difficult for the sealant 8 to overflow through the outer overflow glue portion 31 than through the inner overflow glue portion 41. Even if the amount of sealant 8 is too large and there is a risk of overflow, the sealant 8 will overflow from a path that is easier to flow out. In other words, the sealant 8 is more likely to overflow from the inner overflow glue portion 41 through the inner glue cavity 4, thereby reducing the possibility and amount of the sealant 8 overflowing from the outer overflow glue portion 31 to the outer surfaces of the upper shell 1 and the lower shell 2, and on the basis of ensuring the sealing performance of the upper shell 1 and the lower shell 2, the production efficiency of the sealed shell can be improved.

[0049] like Figure 3 As shown, optionally, the minimum dimension of the outer rubber cavity 3 in the groove width direction of the sealing groove 21 is smaller than the minimum dimension of the inner rubber cavity 4 in the groove width direction of the sealing groove 21 .

[0050] The minimum size of the outer rubber cavity 3 can be referred to Figure 3 The minimum size of L1 and inner rubber cavity 4 can be referred to Figure 3 L2, L1 is smaller than L2, so the mechanical energy lost by the sealant 8 when passing through the minimum size of the outer rubber cavity 3 is greater than the mechanical energy lost when passing through the minimum size of the inner rubber cavity 4, thereby increasing the resistance loss corresponding to the outer rubber cavity 3 to a certain extent.

[0051] It should be understood that the manner in which the outer rubber cavity 3 forms its minimum size and the manner in which the inner rubber cavity 4 forms its minimum size are not intended to be limiting.

[0052] Optionally, the sealed housing further includes a plug-in positioning structure, and the upper housing 1 and the lower housing 2 are positioned and connected via the plug-in positioning structure.

[0053] The arrangement of the plug-in positioning structure enables the upper shell 1 and the lower shell 2 to be connected in a preset posture in the up-down direction, thereby improving the data stability of the above two minimum dimensions.

[0054] In some cases, a protrusion can be provided on the outer surface of the sealing plate 11 along the groove width direction, for example, the surface of the rubber retaining structure 6 on the sealing plate 11 described later along the groove width direction of the sealing groove 21, and the protrusion abuts against the inner surface of the outer groove wall structure 211 of the sealing groove 21, thereby realizing the relative positioning of the upper shell 1 and the lower shell 2.

[0055] Optionally, at least one of the sealing groove 21 and the sealing plate 11 at the outer rubber cavity 3 is provided with a rubber blocking structure 6 .

[0056] like Figure 3 As shown, it shows the situation that the glue blocking structure 6 is arranged on the outer surface of the sealing plate 11 . The glue blocking structure 6 can also be arranged on the inner surface of the outer groove wall structure 211 of the sealing groove 21 .

[0057] The setting of the rubber retaining structure 6 enables the outer rubber cavity 3 to obtain a smaller size in the groove width direction of the sealing groove 21, for example, to obtain the minimum size corresponding to the outer rubber cavity 3, thereby increasing the resistance loss corresponding to the outer rubber cavity 3.

[0058] like Figure 3 As shown, optionally, when the lower surface of the sealing plate 11 is in contact with the inner bottom surface 213 of the sealing groove 21 , the lower end of the glue retaining structure 6 is spaced apart from the inner bottom surface 213 of the sealing groove 21 .

[0059] This arrangement, while increasing the resistance loss corresponding to the outer rubber cavity 3, can also utilize the portion of the outer rubber cavity 3 located at the lower end of the rubber retaining structure 6 to ensure the performance of the outer rubber cavity 3 in containing the sealant 8, reduce the influence of the setting of the rubber retaining structure 6 on the performance of the outer rubber cavity 3 in containing the sealant 8, and reduce the possibility of the sealant 8 overflowing through the outer overflow rubber portion 31.

[0060] like Figure 3 As shown, optionally, when the lower surface of the sealing plate 11 is in contact with the inner bottom surface 213 of the sealing groove 21 , the upper end of the glue blocking structure 6 is spaced apart from the overflowing glue portion 31 in the up-and-down direction.

[0061] Similarly, this arrangement, while increasing the resistance loss corresponding to the outer rubber cavity 3, uses the portion of the outer rubber cavity 3 located at the upper end of the rubber blocking structure 6 to ensure the performance of the outer rubber cavity 3 in containing the sealant 8, reduces the influence of the setting of the rubber blocking structure 6 on the performance of the outer rubber cavity 3 in containing the sealant 8, and reduces the possibility of the sealant 8 overflowing through the outer overflow rubber portion 31.

[0062] like Figure 4As shown, in a further optional solution of the glue blocking structure 6, the glue blocking structure 6 includes a set height section 61, and the surface of the glue blocking structure 6 in the set height section 61, which is located in the groove width direction of the sealing groove 21, is arranged to face obliquely upward.

[0063] like Figure 4 It shows the case where the glue blocking structure 6 only includes a set height section 61. In this case, the outer glue cavity 3 obtains its minimum dimension in the groove width direction of the sealing groove 21 at the lower end of the set height section 61, and the surface of the glue blocking structure 6 located in the groove width direction of the sealing groove 21 is set obliquely upward, so that from bottom to top within the set height, the dimension of the outer glue cavity 3 in the groove width direction of the sealing groove 21 generally tends to gradually increase, thereby increasing the corresponding resistance loss of the outer glue cavity 3, ensuring the performance of the outer glue cavity 3 in accommodating the sealant 8, and reducing the possibility of the sealant 8 overflowing through the overflow glue portion 31.

[0064] like Figure 5 As shown, in an optional solution of the present invention, the path length of the sealant 8 overflowing through the outer overflow glue portion 31 of the outer glue cavity 3 is greater than or equal to the path length of the sealant 8 overflowing through the inner overflow glue portion 41 of the inner glue cavity 4 .

[0065] The implementation method of making the path length of the sealant 8 overflowing through the overflow glue portion 31 of the outer glue cavity 3 longer is not a limitation. For example, the path of the sealant 8 overflowing through the overflow glue portion 31 of the outer glue cavity 3 includes at least one of an inclined path segment and a curved path segment, thereby increasing the path length of the sealant overflowing through the outer glue cavity 3.

[0066] In this way, by setting the overflow path length, the resistance loss of the sealant 8 overflowing through the overflow glue portion 31 of the outer glue cavity 3 is made larger, thereby reducing the possibility of overflowing through the overflow glue portion 31 of the outer glue cavity 3 .

[0067] Optionally, the inner surface of the outer groove wall structure 211 of the sealing groove 21 includes at least one of an inclined section 211A and a curved section 211B in the up and down directions, and the inner surface of the outer groove wall structure 211 of the sealing groove 21 at least the inclined section 211A is set obliquely upward.

[0068] Specifically, the inclined section 211A is used to form the inclined path section, and the curved section is used to form the curved path section. At this time, the shape of the outer surface of the sealing plate 11 can be set to match the shape of the inner surface of the outer groove wall structure 211.

[0069] like Figure 5As shown, it shows that the inner surface of the outer groove wall structure 211 of the sealing groove 21 is parallel to the outer surface of the sealing plate 11, and the inner surface of the outer groove wall structure 211 is generally oriented obliquely upward. At this time, in the set vertical section, the outer glue cavity 3 is inclined from bottom to top to the outside, that is, the path of the glue overflowing through the outer glue cavity 3 includes an inclined path section, so that the path length of the sealant 8 overflowing through the outer glue overflow portion 31 is longer, and the set vertical section is parallel to the groove width direction of the sealing groove 21.

[0070] like Figure 6 As shown, it shows that the inner surface of the outer groove wall structure 211 of the sealing groove 21 includes a first concave-convex structure, the outer surface of the sealing plate 11 includes a second concave-convex structure, and the shapes of the first concave-convex structure and the second concave-convex structure are adapted. Specifically, it can be understood that the first concave-convex structure and the second concave-convex structure are adapted when the lower surface of the sealing plate 11 is in contact with the inner bottom surface 213 of the sealing groove 21. In this case, it is assumed that the outer glue cavity 3 is a curved structure in the vertical cross section, that is, the path of the glue overflowing through the outer glue cavity 3 includes a curved path section, so that the path length of the sealant 8 overflowing through the outer glue overflow portion 31 is longer.

[0071] In the above embodiment, optionally, the position of the outer overflow glue portion 31 in the vertical direction is flush with the position of the inner overflow glue portion 41 in the vertical direction, or the position of the outer overflow glue portion 31 in the vertical direction is higher than the position of the inner overflow glue portion 41 in the vertical direction.

[0072] like Figure 4 As shown, when the position of the overflowing glue portion 31 in the up-down direction is flush with the position of the inner overflowing glue portion 41 in the up-down direction, it is convenient for the structural setting of the sealing groove 21 to avoid the formation of the overflowing glue portion 31 and the inner overflowing glue portion 41 at different height positions in the up-down direction. For example, when the overflowing glue portion 31 is formed by the top surface of the outer groove wall structure 211 of the sealing groove 21, and the inner overflowing glue portion 41 is formed by the top surface of the inner groove wall structure 212 of the sealing groove 21, the structural molding of the sealing groove 21 is facilitated.

[0073] like Figure 2As shown, when the position of the external overflow glue portion 31 in the up-down direction is higher than the position of the internal overflow glue portion 41 in the up-down direction, on the one hand, at this time, the path length of the sealant 8 overflowing through the external overflow glue portion 31 of the outer glue cavity 3 can be increased to a certain extent, and the corresponding resistance loss of the outer glue cavity 3 is increased, thereby further reducing the possibility of the sealant 8 overflowing through the external overflow glue portion 31; on the other hand, the capacity of the outer glue cavity 3 is increased, and more sealant 8 can be accommodated. Even if the overflow capacity of the internal overflow glue portion 41 is insufficient, excess sealant 8 can continue to be accommodated by the portion of the outer glue cavity 3 below the external overflow glue portion 31 and above the internal overflow glue portion 41, thereby further reducing the possibility of the sealant 8 overflowing through the external overflow glue portion 31. In this case, the top surface of the outer groove wall structure 211 of the sealing groove 21 can also be used to form the external overflow glue portion 31, and the top surface of the inner groove wall structure 212 of the sealing groove 21 can also be used to form the inner overflow glue portion 41.

[0074] Of course, in other embodiments, the external overflow glue portion 31 can be a groove or hole opened in the outer groove wall structure 211 of the sealing groove 21, and the internal overflow glue portion 41 can be a groove or hole opened in the inner groove wall structure 212 of the sealing groove 21, which will not be described in detail here.

[0075] In the above embodiment, optionally, at least one of the sealing groove 21 and the sealing plate 11 is provided with a recessed structure 7 .

[0076] Specifically, the provision of the recessed structure 7 can increase the glue capacity of the outer glue cavity 3 or the inner glue cavity 4 , thereby reducing the possibility of glue overflowing through the outer glue overflow portion 31 .

[0077] Further, the recessed structure 7 includes at least one of a first recessed portion 71 , a second recessed portion 72 , a third recessed portion 73 , a fourth recessed portion 74 and a fifth recessed portion.

[0078] like Figure 7 and Figure 8 As shown, the first recessed portion 71 is disposed at the outer edge of the lower end of the sealing plate 11 , for example, a triangular notch is formed by chamfering.

[0079] like Figure 7 As shown, the second recessed portion 72 is disposed at the inner edge of the lower end of the sealing plate 11 , for example, a triangular notch is formed by chamfering.

[0080] like Figure 8 As shown, the third recessed portion 73 is disposed on the inner groove wall structure 212 of the sealing groove 21 .

[0081] like Fig. 9 As shown, the fourth recessed portion 74 is disposed on the outer groove wall structure 211 (in the figure) of the sealing groove 21 .

[0082] Optionally, each of the above-mentioned recessed structures 7 is extended along the extension direction of the sealing groove 21. For example, the recessed structures 7 are extended to be connected at both ends. Thus, the arrangement of the recessed structures 7 can achieve a greater increase in the containment performance of the sealant 8 of the sealing groove 21.

[0083] In the above embodiment, optionally, at least one of the sealing groove 21 and the sealing plate 11 is provided with rough textures corresponding to the outer rubber cavity 3 .

[0084] The rough texture can be arranged in the related existing technology, so that it can increase the resistance loss corresponding to the outer rubber cavity 3.

[0085] In the above embodiment, the plug-in positioning structure may include a positioning post and a positioning hole. For example, the upper shell 1 and the lower shell 2 are respectively provided with a positioning post and a positioning hole, and the positioning post and the positioning hole are plugged and connected, or the upper shell 1 and the lower shell 2 are respectively provided with positioning holes, and the two ends of the positioning post are respectively connected to the two positioning holes. When the sealed shell is used to install the circuit board assembly, the positioning post can also be used to position the circuit board assembly at the same time.

[0086] Optionally, at least one of the upper shell 1 and the lower shell 2 is provided with a glue injection hole, and the glue injection hole is used to inject glue into the installation cavity 5 .

[0087] In this way, after completing the installation of the upper shell 1, the lower shell 2 and the components in the installation cavity 5, the joint surface of the upper shell 1 and the lower shell 2 is sealed by the sealant 8 in the sealing groove 21, and then the glue is poured into the installation through the glue pouring hole, so as to protect the components in the installation cavity 5, ensure the waterproof and dustproof performance of the inverter, and reduce the possibility of glue overflow on the above-mentioned joint surface during the glue pouring process.

[0088] The upper housing 1 or the lower housing 2 may also be provided with a mounting hole for mounting the wiring harness assembly 9 .

[0089] In a second aspect, the utility model provides an inverter, which includes the sealed housing of the above embodiment.

[0090] In a third aspect, the utility model provides a power system, which includes the inverter of the above embodiment, or includes the sealed housing of the above embodiment. For example, the power system may be a photovoltaic power generation system.

[0091] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A sealed housing, characterized in that: The invention comprises an upper shell (1) and a lower shell (2), wherein the lower shell (2) is provided with a sealing groove (21), wherein the sealing groove (21) is extended along the circumference of the lower shell (2), and the upper shell (1) is provided with a sealing plate (11) corresponding to the sealing groove (21), wherein a sealing glue (8) is provided in the sealing groove (21), wherein the sealing plate (11) extends into the sealing glue (8), and wherein an outer glue cavity (3) and an inner glue cavity (4) are respectively formed on both sides of the sealing plate (11) in the sealing groove (21), and The upper shell (1) and the lower shell (2) are combined to form a mounting cavity (5); the outer rubber cavity (3) and the inner rubber cavity (4) are respectively provided with an outer overflow rubber portion (31) and an inner overflow rubber portion (41); the structural arrangement of the sealing groove (21) and the sealing plate (11) enables the resistance loss corresponding to the outer rubber cavity (3) to be greater than the resistance loss corresponding to the inner rubber cavity (4), wherein the resistance loss is the mechanical energy consumed by a unit weight of the sealant (8) when it flows from the corresponding rubber cavity to the corresponding overflow rubber portion.

2. The sealed housing according to claim 1, characterized in that: The minimum dimension of the outer rubber cavity (3) in the groove width direction of the sealing groove (21) is smaller than the minimum dimension of the inner rubber cavity (4) in the groove width direction of the sealing groove (21).

3. The sealed housing according to claim 2, characterized in that: At least one of the sealing groove (21) and the sealing plate (11) at the outer rubber cavity (3) is provided with a rubber blocking structure (6).

4. The sealed housing according to claim 3, characterized in that: The rubber blocking structure (6) comprises a set height section (61), and a surface of the rubber blocking structure (6) in the set height section (61) located in the groove width direction of the sealing groove (21) is arranged to face obliquely upwards; and / or, when the lower surface of the sealing plate (11) is in contact with the inner bottom surface (213) of the sealing groove (21), the lower end of the rubber retaining structure (6) is spaced apart from the inner bottom surface (213) of the sealing groove (21); And / or, when the lower surface of the sealing plate (11) is in contact with the inner bottom surface (213) of the sealing groove (21), the upper end of the glue blocking structure (6) and the overflowing glue portion (31) are spaced apart in the upper and lower directions.

5. The sealed housing according to claim 1, characterized in that: The path length of the sealant (8) overflowing from the outer overflowing glue portion (31) of the outer glue cavity (3) is greater than or equal to the path length of the sealant (8) overflowing from the inner overflowing glue portion (41) of the inner glue cavity (4).

6. The sealed housing according to claim 5, characterized in that: The path along which the sealant (8) overflows from the overflowing glue portion (31) of the outer glue cavity (3) comprises at least one of an inclined path segment and a curved path segment.

7. The sealed housing according to claim 6, characterized in that: The inner surface of the outer groove wall structure (211) of the sealing groove (21) includes at least one of an inclined section (211A) and a curved section (211B) in the up-down direction, and the inner surface of the outer groove wall structure (211) of the sealing groove (21) at least in the inclined section (211A) of the inclined section (211B) is arranged to face obliquely upward.

8. The sealed housing according to any one of claims 1 to 7, characterized in that: The position of the external overflowing glue portion (31) in the vertical direction is not lower than the position of the internal overflowing glue portion (41) in the vertical direction; And / or, the top surface of the outer groove wall structure (211) of the sealing groove (21) is used to form the overflowing glue portion (31); And / or, the top surface of the inner groove wall structure (212) of the sealing groove (21) is used to form the inner overflow glue portion (41).

9. The sealed housing according to any one of claims 1 to 7, characterized in that: At least one of the sealing groove (21) and the sealing plate (11) is provided with a recessed structure (7).

10. The sealed housing according to claim 9, characterized in that: The recessed structure (7) comprises at least one of a first recessed portion (71), a second recessed portion (72), a third recessed portion (73) and a fourth recessed portion (74); the first recessed portion (71) is arranged at the outer edge of the lower end of the sealing plate (11); the second recessed portion (72) is arranged at the inner edge of the lower end of the sealing plate (11); the third recessed portion (73) is arranged at the inner groove wall structure (212) of the sealing groove (21); and the fourth recessed portion (74) is arranged at the outer groove wall structure (211) of the sealing groove (21); And / or, the recessed structure (7) is extended along the extension direction of the sealing groove (21).

11. The sealed housing according to any one of claims 1 to 7, characterized in that: At least one of the sealing groove (21) and the sealing plate (11) is provided with a rough texture corresponding to the outer rubber cavity (3); And / or, the sealed housing further comprises a plug-in positioning structure, and the upper housing (1) and the lower housing (2) are positioned and connected via the plug-in positioning structure; And / or, at least one of the upper shell (1) and the lower shell (2) is provided with a glue injection hole, and the glue injection hole is used to inject glue into the installation cavity (5).

12. An inverter, characterized in that: Comprising the sealed housing according to any one of claims 1 to 11.

13. A power system, characterized in that: It comprises the sealed housing as claimed in any one of claims 1 to 11, or comprises the inverter as claimed in claim 12.

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