A photovoltaic inverter with a drawer-type quick-change cooling fan

Abstract

This utility model discloses a drawer-type quick-change cooling fan photovoltaic inverter, including a fan bracket, which is installed inside an inner shell, and the inner shell is installed inside the photovoltaic inverter body. Three fans are evenly spaced inside the fan bracket. This utility model includes an inner shell, a fan bracket, and an air vent. The inner shell is fixedly installed in a reserved space inside the photovoltaic inverter body with screws, and the fan bracket is fixedly engaged inside the inner shell with a locking mechanism. The fans are installed inside the fan bracket, and the air vent is fixedly installed on the outer wall of the photovoltaic inverter body with screws, which can press the fan bracket tightly inside the inner shell. When it is necessary to replace or clean the fan, the fan bracket can be quickly removed by pulling it out by disassembling the air vent and snapping the locking mechanism inward, improving operational efficiency.

Description

Technical Field

[0001] This utility model specifically relates to the technical field of photovoltaic inverters, and specifically to a photovoltaic inverter with a drawer-type quick-change cooling fan. Background Technology

[0002] Photovoltaic inverters are key components in solar photovoltaic power generation systems. They are mainly used to convert the direct current (DC) generated by photovoltaic solar panels into alternating current (AC). By turning on and off power electronic switches (such as IGBTs and MOSFETs), the DC power generated by the photovoltaic modules is converted into high-frequency AC power, which can be connected to the public power grid or directly supplied to local loads. During operation, the power devices inside the photovoltaic inverter generate a lot of heat due to energy conversion losses. If the heat cannot be dissipated in time, it will cause the equipment temperature to rise, affecting the conversion efficiency, shortening the service life, and even causing failure. Therefore, heat dissipation mechanisms are required.

[0003] Currently used photovoltaic inverters typically employ built-in fans for active cooling. Since photovoltaic inverters are usually exposed to the outdoors for extended periods during use, debris carried by the airflow accumulates inside the cooling mechanism. Excessive debris buildup can affect the cooling efficiency of the mechanism and potentially disrupt the stable operation of the inverter. Therefore, regular cleaning is necessary. However, the cooling mechanisms used in current photovoltaic inverters are usually fixed, making disassembly and assembly difficult and reducing efficiency during cleaning or replacement. This presents a drawback in their use. Utility Model Content

[0004] The purpose of this utility model is to provide a photovoltaic inverter with a drawer-type quick-change cooling fan, so as to solve the problem mentioned in the background art that the cooling mechanism used in the current photovoltaic inverter is usually fixed, which is difficult to disassemble and install, and has low efficiency when cleaning or replacing, thus having drawbacks in use.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A photovoltaic inverter with a drawer-type quick-change cooling fan includes a fan frame, which is installed inside an inner shell, and the inner shell is installed inside the photovoltaic inverter body. Three fans are installed inside the fan frame at equal intervals. Each fan corresponds to a second air outlet, and each second air outlet is located at the bottom of the fan frame. Two first connectors are symmetrically distributed at both ends of the fan frame, and a contact piece is installed at the bottom of each first connector.

[0007] As a further embodiment of this utility model: two second connectors are symmetrically installed at the bottom ends of the inner shell, and a set of contacts is installed on the top of each second connector; each set of contacts has two contacts, and each set of contacts is electrically connected to a contact piece; a rubber sheet is connected between each contact and the inner wall of the inner shell.

[0008] As a further embodiment of this utility model: the fan frame has two locking components symmetrically distributed at both ends, and the two locking components are respectively engaged with two sets of locking strips; the two sets of locking strips are respectively located at both ends of the inner shell, and each set of locking strips has two symmetrically distributed locking strips.

[0009] As a further embodiment of this utility model: the bottom of the inner shell is provided with three first air outlets at equal intervals, and each first air outlet is distributed in correspondence with a second air outlet. At the same time, the connection between the inner shell and the fan frame is a sliding connection.

[0010] As a further embodiment of this utility model: two baffles are symmetrically distributed at both ends of the inner shell, and the width of the baffles is greater than the width of the retaining strip.

[0011] As a further embodiment of this utility model: each of the first air outlets is connected to the interior of the diversion chamber, and the interior of the diversion chamber is provided with several air guide chambers at equal intervals, while the depth of each air guide chamber increases from the center to both sides.

[0012] As a further embodiment of this utility model: the connection between the fan bracket and the fan is a sliding connection, and the bottom of the fan bracket is covered with a rubber pad.

[0013] As a further embodiment of this utility model: the air vent is installed on the outer wall of the photovoltaic inverter body, and the photovoltaic inverter body has a grid structure.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model includes an inner shell, a fan bracket, and an air vent. The inner shell is fixedly installed in the reserved space inside the photovoltaic inverter body by screws, and the fan bracket is fixedly engaged inside the inner shell by a snap-fit ​​device. The fan is installed inside the fan bracket. The air vent is fixedly installed on the outer wall of the photovoltaic inverter body by screws, which can press the fan bracket tightly inside the inner shell. When it is necessary to replace or clean the fan, the fan bracket can be quickly removed by pulling it out by disassembling the air vent and snapping the snap-fit ​​device inward, which improves the operation efficiency.

[0016] 2. This utility model is provided with a flow divider and an air guide chamber. After the fan drives the airflow to accelerate into the flow divider, the airflow can be divided and directed to both sides of the flow divider through the air guide chamber, thereby improving the smoothness of airflow in the photovoltaic inverter body and reducing noise.

[0017] 3. This utility model includes a first connector, a contact piece, a second connector, and a contact point. When the fan bracket is installed inside the inner shell, the contact piece contacts the corresponding contact point. Both the contact piece and the contact point are made of brass and are used to connect the fan to the circuit. The contact point is electrically connected to the second connector through a wire, and the contact point is connected to the inner shell through a rubber sheet. Since the rubber sheet has a certain elasticity, the contact point can move within a certain range. When the contact point is subjected to pressure from the contact piece, the elasticity generated by the stretching of the rubber sheet causes the contact point to adhere tightly to the contact piece. While maintaining ease of disassembly and assembly, it can improve the tightness of the connection between the contact point and the contact piece. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a utility model Figure 1 Another perspective view.

[0020] Figure 3 This is a three-dimensional structural diagram of the air vent in this utility model.

[0021] Figure 4 This is a utility model Figure 3 Another perspective view.

[0022] Figure 5 This is a three-dimensional structural diagram of the fan in this utility model.

[0023] Figure 6 This is a utility model Figure 5 Another perspective view.

[0024] Figure 7 This is a three-dimensional structural diagram of the inner shell in this utility model.

[0025] Figure 8 This is a utility model Figure 7 Another perspective view.

[0026] Figure 9 This is a utility model Figure 8 Another perspective view.

[0027] Figure 10 This is a utility model Figure 7 Enlarged view of point A in the image.

[0028] In the diagram: 1-PV inverter body, 2-inner shell, 3-first air outlet, 4-diverter compartment, 5-air guide chamber, 6-baffle strip, 7-clamping strip, 8-fan bracket, 9-rubber pad, 10-second air outlet, 11-clamping component, 12-first connector, 13-contact piece, 14-second connector, 15-contact point, 16-rubber sheet, 17-fan, 18-vent. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1-10 In this embodiment of the present invention, a photovoltaic inverter with a drawer-type quick-change cooling fan includes a fan frame 8, which is installed inside an inner shell 2, and the inner shell 2 is installed inside the photovoltaic inverter body 1. Fans 17 are installed inside the fan frame 8, and three fans 17 are evenly spaced. Each fan 17 corresponds to a second air outlet 10, and each second air outlet 10 is located at the bottom of the fan frame 8. Two first connectors 12 are symmetrically distributed at both ends of the fan frame 8, and each first connector 12 has a contact at its bottom. The inner shell 2 has two second connectors 14 symmetrically installed at its bottom ends, and each second connector 14 has a set of contacts 15 installed at its top. Each set of contacts 15 has two contacts, and each set of contacts 15 is electrically connected to a contact piece 13. Each contact 15 is connected to the inner wall of the inner shell 2 by a rubber sheet 16. The fan frame 8 has two locking pieces 11 symmetrically distributed at both ends, and the two locking pieces 11 are respectively locked to two sets of locking strips 7. The two sets of locking strips 7 are respectively located at both ends inside the inner shell 2, and each set of locking strips 7 has two symmetrically distributed pieces.

[0031] More specifically, the photovoltaic inverter body 1 has a grille structure on all four sides to facilitate air exhaust.

[0032] As a further explanation of this embodiment, both the contact piece 13 and the contact point 15 are made of brass. The contact point 15 is connected to the second connector 14 by a wire, and both second connectors 14 are electrically connected to the photovoltaic inverter body 1.

[0033] In this embodiment, the bottom of the inner shell 2 is provided with three first air outlets 3 at equal intervals, and each first air outlet 3 is distributed in correspondence with a second air outlet 10. At the same time, the inner shell 2 and the fan frame 8 are connected by a sliding connection.

[0034] To be more specific, the fan bracket 8 and the inner shell 2 can be separated by pulling them out.

[0035] As a further illustration of this embodiment, the inner shell 2 is fixed inside the photovoltaic inverter body 1 by screws.

[0036] In this embodiment, two baffles 6 are symmetrically distributed at both ends of the inner shell 2, and the width of the baffles 6 is greater than the width of the retaining strips 7.

[0037] More specifically, the thickness of the latching component 11 gradually decreases from bottom to top, and the lower part of the latching component 11 has an arc-shaped protrusion. When the fan bracket 8 enters the inner shell 2 from the outside to the inside, the outer wall of the latching component 11 will slide tightly against the baffle 6, thereby causing the latching component 11 to rotate naturally inward.

[0038] As a further explanation of this embodiment, when the arc-shaped protrusion completely passes the stop bar 6, the engaging member 11 will automatically spring back, thereby driving the triangular protrusion at the top of the engaging member 11 to engage with the corresponding locking bar 7, thereby fixing the fan bracket 8 inside the inner shell 2.

[0039] In this embodiment, each of the first air outlets 3 is connected to the interior of the diversion chamber 4, and the interior of the diversion chamber 4 is provided with a plurality of air guide chambers 5 at equal intervals, and the depth of each air guide chamber 5 increases from the center to both sides.

[0040] To be more specific, the diversion chamber 4 has openings on both sides.

[0041] As a further explanation of this embodiment, the inner wall of the air guide chamber 5 has two symmetrical arc-shaped structures, which are used to guide the airflow to disperse to both sides and reduce noise.

[0042] In this embodiment, the fan bracket 8 and the fan 17 are connected by a sliding connection, and the bottom of the fan bracket 8 is covered with a rubber pad 9.

[0043] More specifically, the connection between the fan 17 and the fan bracket 8 is fixed by screws, and the three fans 17 are respectively connected in series with the two first connectors 12.

[0044] As a further illustration of this embodiment, the rubber pad 9 can reduce the noise generated by the vibration of the fan bracket 8 when the fan 17 starts.

[0045] In this embodiment, the air vent 18 is installed on the outer wall of the photovoltaic inverter body 1, and the photovoltaic inverter body 1 has a grid structure.

[0046] More specifically, when the vent 18 is installed on the outer wall of the photovoltaic inverter body 1, it presses the fan bracket 8 tightly inside the inner shell 2.

[0047] As a further illustration of this embodiment, the grille structure can block and filter larger debris in the air.

[0048] The working principle of this utility model is as follows: When it is necessary to replace the fan 17, first remove the air vent 18, then simultaneously snap the two locking pieces 11 inward so that the triangular protrusions on the top of the locking pieces 11 disengage from the two sets of locking strips 7 respectively. Then pull the fan frame 8 outward to remove the fan frame 8 and the fan 17. Then insert the fan frame 8 with the new fan 17 into the inner shell 2 to complete the quick replacement of the fan 17. Then reinstall the air vent 18 on the outer wall of the photovoltaic inverter body 1 and press the fan frame 8 tightly into the inner shell 2. At this time, the contact pieces 13 are tightly attached to the corresponding contact points 15, and the fan 17 is connected to the circuit.

[0049] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0050] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A photovoltaic inverter with a drawer-type quick-change cooling fan, characterized in that: The device includes a fan frame (8), which is installed inside the inner shell (2), and the inner shell (2) is installed inside the photovoltaic inverter body (1); the fan frame (8) is equipped with a fan (17), and the fan (17) is arranged in three evenly spaced positions; each fan (17) is distributed with a second air outlet (10), and each second air outlet (10) is opened at the bottom of the fan frame (8); the two ends of the fan frame (8) are respectively symmetrically distributed with two first connectors (12), and each first connector (12) has a contact piece (13) installed at the bottom. The inner shell (2) has two second connectors (14) installed symmetrically at its bottom ends, and each second connector (14) has a set of contacts (15) installed on its top; each set of contacts (15) has two contacts, and each set of contacts (15) is electrically connected to a contact piece (13); each contact (15) is connected to the inner wall of the inner shell (2) with a rubber sheet (16). The fan frame (8) is provided with two locking parts (11) symmetrically distributed at both ends, and the two locking parts (11) are respectively engaged with two sets of locking strips (7); the two sets of locking strips (7) are respectively provided at both ends of the inner shell (2), and each set of locking strips (7) is provided with two in a symmetrical manner.

2. A photovoltaic inverter with a drawer-type quick-change cooling fan according to claim 1, characterized in that: The bottom of the inner shell (2) is provided with three first air outlets (3) at equal intervals, and each first air outlet (3) is distributed in correspondence with a second air outlet (10). Meanwhile, the inner shell (2) and the fan frame (8) are connected by a sliding connection.

3. A photovoltaic inverter with a drawer-type quick-change cooling fan according to claim 1, characterized in that: The inner shell (2) has two baffles (6) symmetrically distributed at both ends, and the width of the baffles (6) is greater than the width of the clips (7).

4. A photovoltaic inverter with a drawer-type quick-change cooling fan according to claim 2, characterized in that: Each of the first air outlets (3) is connected to the interior of the diversion chamber (4), and the interior of the diversion chamber (4) is provided with several air guide chambers (5) at equal intervals, while the depth of each air guide chamber (5) increases from the center to both sides.

5. A photovoltaic inverter with a drawer-type quick-change cooling fan according to claim 1, characterized in that: The fan bracket (8) and the fan (17) are connected by a sliding connection, and the bottom of the fan bracket (8) is covered with a rubber pad (9).

6. A photovoltaic inverter with a drawer-type quick-change cooling fan according to claim 1, characterized in that: The photovoltaic inverter body (1) has an air vent (18) on its outer wall, and the photovoltaic inverter body (1) has a grid structure.

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