Photovoltaic inverter test platform and its test process

Abstract

The present invention belongs to the field of detection technology, and in particular relates to a photovoltaic inverter test platform and a test process thereof; one photovoltaic inverter test platform comprises: a detection table, which is slidably arranged on a workbench and is used to limit the inverter; a sealing pressure head, which is lifted and lowered above the workbench and is connected to a compressed air pump; an adjusting sealing structure, which is arranged on the bottom wall of the sealing pressure head and is adapted to the detection window of the inverter; wherein, during detection, the sealing pressure head moves downward until the adjusting sealing structure abuts against the stepped bottom wall of the detection window, and the compressed air pump delivers compressed air into the inverter to detect whether its airtightness is qualified; if a leak occurs, the sealing pressure head continues to move downward so that the adjusting sealing structure abuts against the inner wall of the detection window to distinguish the leakage source; by adjusting the setting of the sealing structure, the leakage source can be distinguished in one detection, the accuracy of the detection is improved, and rework is avoided.

Description

Technical Field

[0001] The present invention belongs to the field of detection technology, and specifically relates to testing the sealing performance of structural components, and in particular to a photovoltaic inverter testing platform and a testing process thereof. Background Art

[0002] As a core component of a photovoltaic system, the airtightness of a photovoltaic inverter directly affects its long-term reliability in outdoor environments. According to the IP65 and above protection level requirements (ISO20486:2020), airtightness testing is required to verify the sealing performance.

[0003] Conventional methods assess airtightness by applying pressure to the interior of a PV inverter and monitoring pressure changes. However, this method has significant drawbacks: it cannot distinguish the source of a leak; pressure monitoring only reflects overall leakage. If a leak is detected during testing, it is impossible to distinguish whether the PV inverter itself is airtight or whether a leak is occurring between the sealing head and the inspection window.

[0004] Therefore, how to solve the problem that existing detection cannot distinguish the source of leakage is a technical problem that urgently needs to be solved in this field.

[0005] It should be noted that the above information disclosed in this background technology section is only used to understand the background technology of the present application concept, and therefore, the above description is not considered to constitute information of related technology. Summary of the Invention

[0006] The embodiments of the present disclosure at least provide a photovoltaic inverter testing platform and a testing process thereof.

[0007] In a first aspect, an embodiment of the present disclosure provides a photovoltaic inverter test platform, comprising:

[0008] A testing table, which is slidably arranged on the workbench and is used to limit the inverter;

[0009] A sealing and pressurizing head is arranged above the workbench and is connected to the compressed air pump;

[0010] An adjustable sealing structure is provided on the bottom wall of the sealing pressure head and is adapted to the detection window of the inverter;

[0011] Air pressure sensor, which is located inside the inverter;

[0012] a control module, which is electrically connected to the air pressure sensor, the compressed air pump, and the drive module for driving the sealing and pressurizing head to move up and down, and is configured to, during testing, control the sealing and pressurizing head to move downward until the adjustment sealing structure abuts against the bottom wall of the step of the detection window, and the compressed air pump delivers compressed air into the inverter. The air pressure sensor is suitable for detecting whether the air tightness of the inverter is qualified;

[0013] If a leak occurs, the sealing and pressurizing head is controlled to continue to move downward so that the adjustable sealing structure abuts against the inner wall of the detection window, and the control module is suitable for distinguishing the source of the leak. In an optional embodiment, the adjustable sealing structure includes: a support block, which is annularly fixed to the bottom wall of the sealing and pressurizing head, has a hollow interior and an open upper end;

[0014] A sealing sleeve is arranged on the bottom wall of the support block and is slidably sealed with the support block;

[0015] A sealing ring is sleeved on the outer wall of the sealing and pressurizing head;

[0016] During the test, the sealing pressure head moves downward until the sealing sleeve contacts the bottom wall of the test window, and the compressed air pump delivers compressed air into the inverter to test whether its air tightness is qualified.

[0017] If air leakage occurs, the sealing pressure head continues to move downward until the outer wall of the sealing ring abuts against the inner wall of the detection window, and compressed air is again supplied to the inverter to test whether its air tightness is qualified.

[0018] In an optional embodiment, the sealing and pressurizing head is provided with a plurality of pressure exhaust air passages along the axial direction, and the pressure exhaust air passages are communicated with the support block;

[0019] The sealing and pressurizing head is provided with a plurality of communicating grooves along the radial direction, the communicating grooves are communicated with the pressure exhaust air passage, and a sealing ring is arranged at the outer end opening of the communicating groove.

[0020] In an optional embodiment, a plurality of return springs are provided on the bottom wall of the support block, the lower ends of the return springs are fixed in the sealing sleeve, and the return springs are suitable for pushing the sealing sleeve to move downward.

[0021] In an optional embodiment, a plurality of first exhaust holes are opened at the bottom inner side of the sealing sleeve;

[0022] A plurality of second exhaust holes are provided on the inner bottom of the support block, and the second exhaust holes are suitable for guiding the compressed air in the inverter to flow to the exhaust air duct;

[0023] When the test is finished, the sealing and pressurizing head moves downward until the second exhaust hole is connected to the first exhaust hole;

[0024] The compressed air in the inverter is discharged to the outside through the exhaust air duct.

[0025] In an optional embodiment, the inner side wall of the sealing ring is provided with a plurality of linkage plates, and the linkage plates extend into the pressure exhaust air duct through the connecting groove;

[0026] Among them, after the second exhaust hole is connected to the first exhaust hole, the compressed air in the inverter flows upward through the exhaust air duct to push the linkage plate to move upward, and the linkage plate pulls the sealing ring inward to deform.

[0027] In an optional embodiment, the linkage plate includes a vertical section and a horizontal section, and the vertical section faces the support block;

[0028] When the compressed air in the inverter flows upward through the exhaust air duct, the vertical section of the linkage plate blocks the air flow velocity, so that the linkage plate is pushed by the compressed air flow to move upward.

[0029] In an optional embodiment, the opening diameter of the first exhaust hole gradually increases from top to bottom to achieve staged pressure relief.

[0030] In an optional embodiment, a sealing pressure head is raised and lowered above the inverter;

[0031] An adjustable sealing structure adapted to the detection window of the inverter includes: a support block, a sealing sleeve, and a sealing ring. The support block is annularly fixed to the bottom wall of the sealing pressure head, is hollow inside, and has an open top.

[0032] The sealing sleeve is lifted and arranged on the bottom wall of the support block, and slides and seals with the support block;

[0033] The sealing ring is mounted on the outer wall of the sealing and pressurizing head and is adapted to abut against the side wall of the detection window; during testing, the sealing and pressurizing head moves downward until the sealing sleeve abuts against the stepped bottom wall of the detection window, and the compressed air pump delivers compressed air into the inverter to test whether its air tightness is qualified;

[0034] If air leakage occurs, the sealing pressure head continues to move downward until the outer wall of the sealing ring abuts against the inner wall of the detection window, and compressed air is again supplied to the inverter to test whether its air tightness is qualified.

[0035] In an optional embodiment, the sealing and pressurizing head is provided with a plurality of pressure exhaust air passages along the axial direction, and the pressure exhaust air passages are communicated with the support block;

[0036] The sealing and pressurizing head is provided with a plurality of communicating grooves along the radial direction, the communicating grooves are connected with the pressure exhaust air passage, and the sealing ring is arranged at the outer end opening of the communicating groove;

[0037] A plurality of linkage plates are provided on the inner side wall of the sealing ring, and the linkage plates extend into the pressure exhaust air duct through the connecting groove.

[0038] In an optional embodiment, a plurality of first exhaust holes are opened at the bottom inner side of the sealing sleeve;

[0039] The opening diameter of the first exhaust hole gradually increases from top to bottom;

[0040] A plurality of second exhaust holes are provided on the inner bottom of the support block, and the second exhaust holes are suitable for guiding the compressed air in the inverter to flow to the exhaust air duct;

[0041] When the test is finished, the sealing and pressurizing head moves downward until the second exhaust hole is connected to the first exhaust hole;

[0042] When the compressed air in the inverter flows upward through the exhaust air duct, it pushes the linkage plate to move upward, and the linkage plate pulls the sealing ring inward to deform.

[0043] In a second aspect, an embodiment of the present disclosure further provides a testing process for a photovoltaic inverter testing platform, the testing process comprising:

[0044] During the test, the sealing pressure head moves downward until the sealing structure is adjusted to abut against the bottom wall of the step of the test window, and the compressed air pump delivers compressed air into the inverter to test whether its air tightness is qualified;

[0045] If leakage occurs, the sealing pressure head continues to move downward so that the regulating sealing structure abuts against the inner wall of the detection window to identify the leakage source.

[0046] The beneficial effect of the present invention is that the present invention provides a photovoltaic inverter test platform and a test process thereof. By adjusting the cooperation between the sealing structure and the sealing pressure head, when the inverter is pressurized for testing, if leakage occurs, the sealing pressure head continues to move downward to make the adjusting sealing structure abut against the inner wall of the detection window to distinguish the source of the leakage. Through one test, it can be accurately determined whether the air tightness of the inverter itself is unqualified or the air tightness of the connection between the adjusting sealing structure and the detection window is unqualified, thereby distinguishing the source of the leakage, improving the detection accuracy, avoiding rework due to errors, and improving work efficiency.

[0047] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0048] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited herein and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in related technologies, the following briefly introduces the drawings required for use in the specific embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0050] Figure 1 A three-dimensional diagram of a photovoltaic inverter test platform provided by an embodiment of the present disclosure;

[0051] Figure 2 A three-dimensional diagram of a sealing and pressurizing head and an inverter provided in an embodiment of the present disclosure;

[0052] Figure 3 A three-dimensional diagram of the sealing and pressurizing head and the adjustable sealing structure provided in an embodiment of the present disclosure;

[0053] Figure 4 A sectional perspective view of a sealing and pressurizing head and an adjustable sealing structure provided in an embodiment of the present disclosure;

[0054] Figure 5 A partial front view of the first state of the adjustable sealing structure and the inverter provided by the embodiment of the present disclosure;

[0055] Figure 6 A partial front view of the second state of the adjustable sealing structure and the inverter provided by the embodiment of the present disclosure;

[0056] Figure 7 This is a functional block diagram of the control module and air pressure sensor provided in an embodiment of the present disclosure.

[0057] In the picture:

[0058] 1. Test bench; 2. Inverter; 20. Test window;

[0059] 3. Sealing pressure head; 31. Exhaust air duct; 32. Connecting groove;

[0060] 4. Adjust the sealing structure; 41. Support block; 42. Sealing sleeve; 43. Sealing ring; 44. First exhaust hole; 45. Second exhaust hole; 46. Linkage plate; 47. Return spring; 5. Workbench. DETAILED DESCRIPTION

[0061] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0062] In this document, when it is mentioned that a first component is located on a second component, this may mean that the first component may be directly formed on the second component, or that a third component may be interposed between the first component and the second component. In addition, in the drawings, the thickness of components may be exaggerated or reduced in order to effectively describe technical content.

[0063] Herein, example embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as "at least one of..." when following a list of elements modify the entire list of elements, rather than modifying individual elements in the list. For example, the expression "at least one of a, b, and c" should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0064] The terms used herein are only used to describe specific exemplary configurations and are not intended to be limiting. As used herein, the singular articles "a", "an" and "the" may also be intended to include plural forms, unless otherwise clearly indicated herein. The terms "comprise", "include" and "have" are inclusive and therefore specify the presence of features, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components and / or combinations thereof. The method steps, processes and operations described herein should not be interpreted as necessarily requiring them to be performed in the particular order discussed or shown, unless specifically identified as an execution order. Additional or alternative steps may be adopted.

[0065] As used herein, the phrases "in one embodiment," "according to one embodiment," "in some embodiments," and the like generally refer to the fact that the particular feature, structure, or characteristic following the phrase may be included in at least one embodiment of the present disclosure. Thus, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example," "exemplary," and the like are used to "serve as an example, instance, or illustration." Any implementation, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations, aspects, or designs. Instead, the use of the terms "example," "exemplary," and the like is intended to present concepts in a concrete manner.

[0066] Research has found that in related technologies, the air tightness of photovoltaic inverters, as the core components of photovoltaic systems, directly affects their long-term reliability in outdoor environments. According to the protection level requirements of IP65 and above (ISO 20486:2020), air tightness testing is required to verify the sealing performance.

[0067] In related technologies, the traditional method involves applying pressure to the inside of a PV inverter and determining airtightness by monitoring pressure changes. However, this method has a significant drawback: it cannot distinguish the source of the leak, and pressure monitoring only reflects overall leakage. During the inspection process, if a leak occurs, it is impossible to distinguish whether the airtightness of the PV inverter itself is unqualified or whether there is a leak between the sealing pressure head and the inspection window. In traditional pressurized testing, when the sealing pressure head and the inspection window are in poor contact, the misjudgment rate increases, resulting in increased rework costs.

[0068] Therefore, how to solve the problem that existing detection cannot distinguish the source of leakage is a technical problem that urgently needs to be solved in this field.

[0069] The defects in the above solutions and the causes of their occurrence are the results obtained by the inventors after practice and careful research. Therefore, the process of discovering the above problems and the solutions proposed by the present disclosure in this article should be the contributions made by the inventors to the present disclosure during the disclosure process.

[0070] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0071] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0072] like Figures 1 to 7As shown, at least one embodiment provides a photovoltaic inverter 2 test platform, including: a test table 1, which is slidably set on a workbench 5 and is used to limit the inverter 2; when the test table 1 slides outward, it is convenient to take and place the inverter 2. After the inverter 2 is fixed on the test table 1, the test table 1 slides inward to the bottom of the sealing pressure head 3, so as to facilitate pressurization testing of the inverter 2. The sealing pressure head 3 is set above the workbench 5 for lifting and is connected to the compressed air pump; the air pressure sensor is located in the inverter; the control module includes a PLC controller, which is electrically connected to the air pressure sensor, the compressed air pump and the driving module for driving the sealing pressure head to move up and down, and the PLC controller is preset with pressure thresholds and time parameters for the first extrusion stage and the second pressurization stage. The driving module includes a linear lifting device, and the sealing pressure head 3 is fixed at the movable end of the linear lifting device. The linear lifting device is suitable for driving the sealing pressure head 3 to move vertically up and down. The sealing and pressurizing head has an air passage connected to a compressed air pump. When adjusting the seal detection window 20 of the sealing structure 4, the compressed air pump delivers compressed air into the inverter 2 through the air passage. Furthermore, a pressure sensor is placed in the inverter 2 before the test. This pressure sensor is suitable for monitoring the real-time air pressure status within the inverter 2. After delivering a certain pressure to the inverter 2, the pressure is stabilized for a period of 100-120 seconds, i.e., 100-120 seconds, after a certain period of quiescence. According to the IEC 60529 standard, the test pressure is set to 12 kPa, and the stabilization time is 120 seconds.

[0073] Reference Attachment Figure 2 The adjustable sealing structure 4 is provided on the bottom wall of the sealing and pressurizing head 3 and is adapted to fit the detection window 20 of the inverter 2. The adjustable sealing structure 4 is adapted to be inserted into the detection port and seal the detection window 20. During testing, the sealing and pressurizing head 3 moves downward until the adjustable sealing structure 4 abuts against the stepped bottom wall of the detection window 20. The compressed air pump delivers compressed air into the inverter 2 to test whether the airtightness is qualified. If a leak occurs, the sealing and pressurizing head 3 continues to move downward until the adjustable sealing structure 4 abuts against the inner wall of the detection window 20. The control module is adapted to distinguish the source of the leak based on the signal transmitted by the air pressure sensor. By adjusting the coordination between the sealing structure 4 and the sealing pressure head 3, when the inverter 2 is pressurized for testing, if leakage occurs, the sealing pressure head 3 continues to move downward to make the sealing structure 4 contact the inner wall of the detection window 20, and the control module is suitable for distinguishing the source of leakage according to the signal transmitted by the air pressure sensor. Through one test, it can be accurately determined whether the air tightness of the inverter 2 itself is unqualified or the air tightness of the connection between the sealing structure 4 and the detection window 20 is unqualified, thereby distinguishing the source of leakage, improving the detection accuracy, avoiding rework due to errors, and improving work efficiency.

[0074] Reference Attachment Figure 3The adjustable sealing structure 4 includes a support block 41, which is annularly fixed to the bottom wall of the sealing pressure head 3 and is hollow inside with an open top. The outer diameter of the ring formed by the support block 41 is smaller than the inner diameter of the detection window 20. That is, when the support block 41 is inserted into the detection window 20, a gap is provided between the outer wall of the support block 41 and the inner wall of the detection window 20. A sealing sleeve 42 is arranged to rise and fall on the bottom wall of the support block 41 and slides and seals with the support block 41. The sealing sleeve 42 is a flexible member. When the sealing sleeve 42 abuts the stepped bottom wall of the detection window 20, the sealing sleeve 42 deforms to increase the contact area between the sealing sleeve 42 and the inverter 2, thereby improving the sealing performance. The sealing ring 43 is sleeved on the outer wall of the sealing and pressurizing head 3. During testing, the sealing and pressurizing head 3 moves downward until the sealing sleeve 42 abuts against the stepped bottom wall of the detection window 20, and the compressed air pump delivers compressed air into the inverter 2. The air pressure sensor is suitable for detecting whether the air tightness of the inverter 2 is qualified. At this time, the sealing ring 43 is located above the detection window 20 of the inverter 2, and the inverter 2 can be sealed only by the sealing sleeve 42 abutting against the stepped bottom wall of the detection window 20.

[0075] Reference Attachment Figure 6 If a leak occurs, that is, the air pressure in the inverter 2 does not reach the predetermined value at the end of the static time as monitored by the air pressure sensor, the inverter 2 is preliminarily judged to be airtight. Further, it is necessary to distinguish whether the airtightness of the photovoltaic inverter 2 itself is unqualified or whether there is a leak at the sealing and pressurizing head 3 and the detection window 20. The sealing and pressurizing head 3 continues to move downward, and the support block 41 moves downward relative to the sealing sleeve 42 until the outer wall of the sealing ring 43 abuts the inner wall of the detection window 20. Compressed air is then supplied to the inverter 2 again to test its airtightness. After the sealing ring 43 abuts the inner wall of the detection window 20, if the value monitored by the air pressure sensor reaches the predetermined value, the inverter 2 is judged to be airtight. If the value monitored by the air pressure sensor does not reach the predetermined value, the inverter 2 is judged to be airtight.

[0076] Reference Attachment Figure 4The sealing and pressurizing head 3 is provided with a plurality of pressure-exhaust air ducts 31 along the axial direction, and the pressure-exhaust air ducts 31 are connected to the support block 41; the pressure-exhaust air duct 31 is opened in the vertical direction; the sealing and pressurizing head 3 is provided with a plurality of connecting grooves 32 along the radial direction, and the connecting grooves 32 are connected to the pressure-exhaust air duct 31, and the sealing ring 43 is arranged at the outer end opening of the connecting groove 32. The connecting groove 32 is opened in the horizontal direction; the sealing ring 43 is arranged circumferentially around the outer wall of the sealing and pressurizing head 3 to seal the connecting groove 32. The inner side wall of the sealing ring 43 is provided with a plurality of linkage plates 46, and the linkage plates 46 extend into the pressure-exhaust air duct 31 through the connecting groove 32; wherein, after the second exhaust hole 45 is connected with the first exhaust hole 44, the compressed air in the inverter 2 pushes the linkage plate 46 to move upward when flowing upward through the pressure-exhaust air duct 31, and the linkage plate 46 pulls the sealing ring 43 to deform inward. The linkage plate 46 is made of a flexible rubber material. When the airflow pushes the vertical section to elastically deform, it drives the sealing ring 43 to contract inward. The linkage plate 46 pulls the sealing ring 43 inward to deform, and when the sealing pressure head 3 is separated from the detection window 20, it prevents the sealing ring 43 from being damaged by friction with the inner wall of the detection window 20.

[0077] Continue to refer to the attached Figure 4 The bottom wall of the support block 41 is provided with several return springs 47. The upper ends of the return springs 47 are fixed to the bottom wall of the support block 41, and the lower ends of the return springs 47 are fixed within the sealing sleeve 42. The return springs 47 are adapted to push the sealing sleeve 42 downward. When the sealing and pressurizing head 3 is not inserted into the detection window 20, the return springs 47 push the sealing sleeve 42 away from the support block 41, so that the second vent 45 is sealed by the inner wall of the sealing sleeve 42. The sealing sleeve 42 has several first vent holes 44 defined on the inner bottom of the support block 41, and several second vent holes 45 defined on the inner bottom of the support block 41. When compressed air is delivered to the inverter 2 for testing, the first vent holes 44 and the second vent holes 45 are offset. The second vent holes 45 are adapted to direct the compressed air within the inverter 2 toward the exhaust duct 31. Upon completion of testing, the sealing and pressurizing head 3 continues to move downward until the second vent holes 45 connect with the first vent holes 44, and the compressed air within the inverter 2 is discharged through the exhaust duct 31. The linkage plate 46 includes a vertical section and a horizontal section, and its vertical section faces the support block 41. When the compressed air in the inverter 2 flows upward through the exhaust air duct 31, the vertical section of the linkage plate 46 blocks the airflow velocity, so that the linkage plate 46 is pushed by the compressed air flow to move upward. The opening diameter of the first exhaust hole 44 gradually increases from top to bottom to achieve segmented pressure relief. When the outer wall of the sealing ring 43 abuts the inner wall of the detection window 20, the first exhaust hole 44 and the second exhaust hole 45 are misaligned, that is, at this time, the compressed air in the inverter 2 will not leak out through the first exhaust hole 44 and the second exhaust hole 45.

[0078] At least one embodiment provides a photovoltaic inverter 2 test platform, including: a sealing pressure head 3, which is lifted and lowered above the inverter 2; an adjustable sealing structure 4, which is adapted to the detection window 20 of the inverter 2, including: a support block 41, a sealing sleeve 42 and a sealing ring 43, wherein the support block 41 is annularly fixed to the bottom wall of the sealing pressure head 3, is hollow inside and has an open upper end; the sealing sleeve 42 is lifted and lowered on the bottom wall of the support block 41, and is slidably sealed with the support block 41; the sealing ring 43 is sleeved on the outer wall of the sealing pressure head 3 and is suitable for abutting against the side wall of the detection window 20; wherein, during testing, the sealing pressure head 3 moves downward until the sealing sleeve 42 abuts against the stepped bottom wall of the detection window 20, and the compressed air pump delivers compressed air into the inverter 2 to detect whether its air tightness is qualified; if a leak occurs, the sealing pressure head 3 continues to move downward until the outer wall of the sealing ring 43 abuts against the inner wall of the detection window 20, and compressed air is again delivered into the inverter 2 to detect whether its air tightness is qualified.

[0079] At least one embodiment provides a testing process for a photovoltaic inverter 2 testing platform, the testing process comprising: during testing, the sealing pressure head 3 moves downward until the adjusting sealing structure 4 abuts against the bottom wall of the step of the detection window 20, and the compressed air pump delivers compressed air into the inverter 2 to detect whether its air tightness is qualified; if a leak occurs, the sealing pressure head 3 continues to move downward so that the adjusting sealing structure 4 abuts against the inner wall of the detection window 20 to distinguish the source of the leak.

[0080] In the description of the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0081] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, terms such as "first", "second" and other numerical terms do not imply an order or sequence when used herein unless expressly indicated above. Therefore, without departing from the teachings of the example embodiments, the first element, component, region, layer or section discussed above may be referred to as a second element, component, region, layer or section.

[0082] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A photovoltaic inverter test platform, characterized in that: include: A testing table (1) is slidably arranged on a workbench (5) and is used to limit the inverter (2); A sealing pressure head (3) is arranged to be lifted above the workbench (5) and is connected to a compressed air pump; An adjustable sealing structure (4) is provided on the bottom wall of the sealing pressure head (3) and is adapted to fit the detection window (20) of the inverter (2); An air pressure sensor located in the inverter (2); A control module is electrically connected to the air pressure sensor, the compressed air pump, and a driving module for driving the sealing pressure head (3) to move up and down, and is configured to, during detection, control the sealing pressure head (3) to move downward until the regulating sealing structure (4) abuts against the bottom wall of the step of the detection window (20), and control the compressed air pump to deliver compressed air into the inverter (2). The air pressure sensor is suitable for detecting whether the air tightness of the inverter (2) is qualified; If a gas leak occurs, the sealing pressure head (3) is controlled to continue to move downward so that the regulating sealing structure (4) abuts against the inner wall of the detection window (20), and the control module is suitable for distinguishing the source of the leak; The regulating sealing structure (4) comprises: a support block (41) which is annularly fixed to the bottom wall of the sealing pressure head (3), is hollow inside and has an open top; A sealing sleeve (42) is arranged on the bottom wall of the support block (41) and is slidably sealed with the support block (41); A sealing ring (43) is sleeved on the outer wall of the sealing pressure head (3); During the test, the sealing pressure head (3) moves downward until the sealing sleeve (42) abuts against the bottom wall of the step of the test window (20), and the compressed air pump delivers compressed air into the inverter (2). The air pressure sensor is suitable for detecting whether the air tightness thereof is qualified; If air leakage occurs, the sealing pressure head (3) continues to move downward until the outer wall of the sealing ring (43) abuts against the inner wall of the detection window (20), and compressed air is again delivered to the inverter (2). The air pressure sensor is suitable for detecting whether the air tightness is qualified; The bottom wall of the support block (41) is provided with a plurality of return springs (47), the lower ends of the return springs (47) are fixed in the sealing sleeve (42), and the return springs (47) are suitable for pushing the sealing sleeve (42) to move downward.

2. The photovoltaic inverter test platform according to claim 1, characterized in that: The sealing pressure head (3) is provided with a plurality of pressure exhaust air passages (31) along the axial direction, and the pressure exhaust air passages (31) are in communication with the support block (41); The sealing pressure head (3) is provided with a plurality of communication grooves (32) along the radial direction, the communication grooves (32) are connected to the pressure exhaust air channel (31), and the sealing ring (43) is arranged at the outer end opening of the communication groove (32).

3. The photovoltaic inverter test platform according to claim 2, characterized in that: A plurality of first exhaust holes (44) are formed on the inner bottom of the sealing sleeve (42); A plurality of second exhaust holes (45) are provided at the inner bottom of the support block (41), and the second exhaust holes (45) are suitable for guiding the compressed air in the inverter (2) to flow toward the exhaust air duct (31); When the test is completed, the sealing and pressurizing head (3) moves downward until the second exhaust hole (45) is connected to the first exhaust hole (44); The compressed air in the inverter (2) is discharged to the outside through the exhaust air duct (31).

4. The photovoltaic inverter test platform according to claim 3, characterized in that: The inner wall of the sealing ring (43) is provided with a plurality of linkage plates (46), and the linkage plates (46) extend into the pressure exhaust duct (31) through the connecting groove (32); After the second exhaust hole (45) is connected to the first exhaust hole (44), the compressed air in the inverter (2) flows upward through the exhaust air duct (31), pushing the linkage plate (46) to move upward, and the linkage plate (46) pulls the sealing ring (43) to deform inward.

5. The photovoltaic inverter test platform according to claim 4, characterized in that: The linkage plate (46) includes a vertical section and a horizontal section, and the vertical section faces the support block (41); When the compressed air in the inverter (2) flows upward through the exhaust air duct (31), the vertical section of the linkage plate (46) blocks the airflow velocity, so that the linkage plate (46) is pushed by the compressed air flow to move upward.

6. The photovoltaic inverter test platform according to claim 3, characterized in that: The opening diameter of the first exhaust hole (44) gradually increases from top to bottom to achieve segmented pressure relief.

7. A photovoltaic inverter test platform, characterized in that: include: A sealing pressure head (3) is arranged to be raised and lowered above the inverter (2); An adjustable sealing structure (4) adapted to the detection window (20) of the inverter (2) comprises: a support block (41), a sealing sleeve (42) and a sealing ring (43), wherein the support block (41) is annularly fixed to the bottom wall of the sealing pressure head (3), is hollow inside and has an open top; The sealing sleeve (42) is lifted and arranged on the bottom wall of the support block (41) and is slidably sealed with the support block (41); The sealing ring (43) is sleeved on the outer wall of the sealing pressure head (3) and is suitable for abutting against the side wall of the detection window (20); wherein, during detection, the sealing pressure head (3) moves downward until the sealing sleeve (42) abuts against the stepped bottom wall of the detection window (20), and the compressed air pump delivers compressed air into the inverter (2) to detect whether its airtightness is qualified; If air leakage occurs, the sealing pressure head (3) continues to move downward until the outer wall of the sealing ring (43) abuts against the inner wall of the detection window (20), and compressed air is again supplied to the inverter (2) to detect whether its air tightness is qualified; The bottom wall of the support block (41) is provided with a plurality of return springs (47), the lower ends of the return springs (47) are fixed in the sealing sleeve (42), and the return springs (47) are suitable for pushing the sealing sleeve (42) to move downward.

8. The photovoltaic inverter test platform according to claim 7, characterized in that: The sealing pressure head (3) is provided with a plurality of pressure exhaust air passages (31) along the axial direction, and the pressure exhaust air passages (31) are in communication with the support block (41); The sealing pressure head (3) is provided with a plurality of communication grooves (32) along the radial direction, the communication grooves (32) are connected to the pressure exhaust air channel (31), and the sealing ring (43) is arranged at the outer end opening of the communication groove (32); A plurality of linkage plates (46) are provided on the inner side wall of the sealing ring (43), and the linkage plates (46) extend into the pressure exhaust air duct (31) through the connecting groove (32).

9. The photovoltaic inverter test platform according to claim 8, characterized in that: A plurality of first exhaust holes (44) are formed on the inner bottom of the sealing sleeve (42); The opening diameter of the first exhaust hole (44) gradually increases from top to bottom; A plurality of second exhaust holes (45) are provided at the inner bottom of the support block (41), and the second exhaust holes (45) are suitable for guiding the compressed air in the inverter (2) to flow toward the exhaust air duct (31); When the test is completed, the sealing and pressurizing head (3) moves downward until the second exhaust hole (45) is connected to the first exhaust hole (44); When the compressed air in the inverter (2) flows upward through the exhaust air duct (31), it pushes the linkage plate (46) to move upward, and the linkage plate (46) pulls the sealing ring (43) to deform inward.

10. A testing process for a photovoltaic inverter testing platform, characterized in that: Using the photovoltaic inverter test platform according to any one of claims 1 to 9, the test process includes: During the test, the sealing pressure head (3) moves downward until the sealing structure (4) is adjusted to abut against the bottom wall of the step of the test window (20), and the compressed air pump delivers compressed air into the inverter (2) to test whether its airtightness is qualified; If a gas leak occurs, the sealing pressure head (3) continues to move downward so that the regulating sealing structure (4) abuts against the inner wall of the detection window (20) to distinguish the source of the leak.

Images