Enhanced protection structure applied to frequency converter

Abstract

The utility model provides an enhanced protection structure applied to a frequency converter, the frequency converter comprises a box body, and a device cavity, an air duct cavity and an electrolytic capacitor which are arranged in the box body, the electrolytic capacitor is partially arranged in the air duct cavity, and the electrolytic capacitor is partially arranged in the device cavity. The electrolytic capacitor passes through a mounting hole of a partition plate in the box body, and the partition plate is used for isolating the air duct cavity from the device cavity; the enhanced protection structure applied to the frequency converter comprises a dustproof insulating ring and a fixing hoop, the dustproof insulating ring is sleeved on the electrolytic capacitor, and the fixing hoop is clamped on the electrolytic capacitor. According to the utility model, the mounting gap between the electrolytic capacitor and the partition plate in the box body can be effectively sealed, the protection on the electrolytic capacitor and the whole device cavity is enhanced, the material and process cost is lower than that of gluing sealing, the production efficiency is higher, and the dustproof insulating ring and the like can be reused.

Description

TECHNICAL FIELD

[0001] The utility model relates to frequency converter technical field especially relates to a kind of enhanced protection structure applied to frequency converter. BACKGROUND

[0002] With the continuous expansion of market application field, frequency converter is in industrial production, the working environment that faces is complex and changeable, such as dust, flammable and explosive gas, high temperature and high humidity environment etc., these can influence the stability and reliability of frequency converter, so the protection of frequency converter is particularly important.The protection principle of frequency converter is that dust, airflow etc.of external environment is blocked into the device cavity of frequency converter by sealing box body, thereby breaking the direct contact of dust and electronic device to realize the protection of frequency converter.

[0003] In the protection treatment of general frequency converter, the protection of electrolytic capacitor is particularly prominent, and the protection treatment scheme is generally as follows: electrolytic capacitor bottom passes through the partition plate in box body and is externally arranged in air duct cavity, and the installation gap between electrolytic capacitor and the partition plate in box body is blocked by sealing glue.This scheme is beneficial to heat dissipation of electrolytic capacitor, saves space and meets the miniaturization development trend of frequency converter, but has the following shortcomings: 1.difficult to control production process, prone to uneven glue, lack of glue, and repeated glue is needed, and glue process is easy to touch and contaminate other devices and box body, affecting the overall appearance of product;2.sealing glue is high in cost, and needs constant temperature preservation;3.sealing glue solidification process is long, which is not conducive to the improvement of production efficiency, generally surface solidification needs 10-15 minutes, and internal complete solidification needs 24 hours;4.sealing glue is not easy to remove after solidification, and needs to be glued again after removal, which is not conducive to after-sales maintenance and replacement of electrolytic capacitor. UTILITY MODEL CONTENTS

[0004] The utility model aims at the deficiencies in the above background art, and provides a kind of

[0005] To achieve the above object, the utility model provides a kind of enhanced protection structure applied to frequency converter, and the frequency converter includes box body, device cavity arranged in the box body, air duct cavity, electrolytic capacitor, part of the electrolytic capacitor is arranged in the air duct cavity, part is arranged in the device cavity, the electrolytic capacitor passes through the mounting hole of the partition plate in the box body, and the partition plate is used to isolate the air duct cavity from the device cavity;

[0006] The enhanced protection structure applied to the frequency converter comprises a dustproof insulating ring and a fixing clamp, the dustproof insulating ring is sleeved on the electrolytic capacitor, the fixing clamp is clamped on the electrolytic capacitor, a first side surface of the dustproof insulating ring is in contact with the fixing clamp, a second side surface of the dustproof insulating ring is in contact with the fixing clamp, and the fixing clamp is locked with the partition plate to press the dustproof insulating ring tightly, thereby sealing the gap between the electrolytic capacitor and the mounting hole.

[0007] Further, the dustproof insulating ring is made of high-temperature-resistant insulating PC material.

[0008] Further, the outer diameter of the dustproof insulating ring is greater than the hole diameter of the mounting hole, and the inner diameter of the dustproof insulating ring is equal to the outer diameter of the electrolytic capacitor or is in interference fit with the electrolytic capacitor.

[0009] Further, the fixing clamp is provided with a notch, clamping holes are arranged on the fixing clamp regions on both sides of the notch, and the fixing clamp regions on both sides of the notch are connected through bolts and nuts arranged in the clamping holes.

[0010] Further, the fixing clamp is also provided with a riveting hole, and a riveting hole is also arranged on the partition plate, the fixing clamp and the partition plate are connected through bolts and nuts arranged in the riveting holes, so that the dustproof insulating ring is pressed tightly.

[0011] Further, the riveting holes are arranged in multiple and distributed around the fixing clamp and the mounting hole of the partition plate.

[0012] Further, the fixing clamp is provided with a fixing foot, the riveting hole of the fixing clamp is located on the fixing foot, and the lower surface of the fixing foot is in contact with the fixing clamp.

[0013] The above scheme of the utility model has the following beneficial effects:

[0014] The enhanced protection structure applied to the frequency converter provided by the utility model can effectively seal the mounting gap between the electrolytic capacitor and the partition plate in the box body, enhance the protection of the electrolytic capacitor and the whole device cavity, significantly improve the overall protection and reliability of the frequency converter, the material cost of the dustproof insulating ring is low, the material and installation cost is much lower than the sealing rubber sealing cost, the product cost is effectively reduced, the process is simple, there is no process waiting time, the production efficiency is effectively improved and the production cost is reduced, the dustproof insulating ring is convenient to disassemble and assemble, convenient for after-sales maintenance, and can be reused without damage.

[0015] Other beneficial effects of the utility model will be described in detail in the following specific embodiment part. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The overall structure of the present application is intended to be;

[0017] Figure 2 The partial structure of the present application is a schematic diagram of disassembly;

[0018] Figure 3 For Figure 2 The enlarged view of A.

[0019] BRIEF DESCRIPTION OF DRAWINGS

[0020] 1 - box; 2 - device cavity; 3 - air duct cavity; 4 - power heating device; 5 - electrolytic capacitor; 6 - heat dissipation fan; 7 - partition; 8 - dustproof insulating ring; 9 - fixed clamp; 10 - bolt. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and advantages of the present application more clear, the following will be described in detail in combination with the drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present application. In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0022] In the description of the present application, it should be pointed out that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation on the present application. The devices or elements indicated or implied must have a particular orientation, construction and operation, therefore it cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present application, it should be pointed out that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be a locking connection, or a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] AsFigure 1 、 Figure 2 The utility model discloses an application for the frequency converter on the enhanced protection structure, the frequency converter including box 1, the device cavity 2 of setting in box 1, air duct cavity 3, power heat generating device 4, electrolytic capacitor 5 to setting in the heat dissipation fan 6 of air duct cavity 3 export position are concerned. Wherein, air duct cavity 3 and device cavity 2 are two different areas, and air duct cavity 3 is provided with inlet and outlet, and inlet and outlet are all communicated with the outside of box 1, and cold air enters from the inlet of air duct cavity 3 under the action of heat dissipation fan 6, and after taking away heat, it is discharged to the environment from the outlet of air duct cavity 3, reaches the purpose of the heat dissipation of power heat generating device 4 and electrolytic capacitor 5 etc. in box 1. The electrolytic capacitor 5 is partially arranged in the air duct cavity 3, and is partially arranged in the device cavity 2, and the electrolytic capacitor 5 is installed and passes the mounting hole of the partition 7 in box 1. Wherein, the partition 7 is used to isolate air duct cavity 3 and device cavity 2.

[0025] When the frequency converter operates, heat dissipation fan 6 drives air to flow in air duct cavity 3. After the installation of electrolytic capacitor 5, there is a gap between the electrolytic capacitor 5 and the mounting hole of the partition 7, and the gap cannot be completely sealed due to assembly reasons, and the dust in the air can enter the device cavity 2 through the gap, and then adhere to the surface of power heat generating device 4 and other devices, which affects the heat dissipation of the devices, and even if the air contains metal dust, the metal dust adheres to the conductor and easily causes a short circuit of the circuit. Therefore, in the embodiment, a dustproof insulating ring 8 is arranged, and the dustproof insulating ring 8 is matched with the electrolytic capacitor 5 and the partition 7 without a gap, so that the dust in the outside is prevented from entering the device cavity 2, and the dustproof purpose is achieved.

[0026] In the embodiment, the dustproof insulating ring 8 is made of high-temperature-resistant insulating PC material with a thickness of 0.3-0.5 mm. The material has low cost, certain strength and toughness, and is not easy to warp and deform, so that the dustproof insulating ring 8 can be seamlessly attached to the surface of the partition 7, and at the same time, the slight stretching required for the dustproof insulating ring 8 to be sleeved on the electrolytic capacitor 5 is met, so that the insulating protective outer film of the electrolytic capacitor 5 is not scratched, and the dustproof insulating ring 8 can be seamlessly attached.

[0027] It should be noted that the outer diameter of the dustproof insulating ring 8 is greater than the hole diameter of the mounting hole, and the dustproof insulating ring 8 is clamped on one side of the partition 7 through the fixed clamp 9 during installation, so that the gap is firmly and reliably sealed. In addition, the inner diameter of the dustproof insulating ring 8 is equal to or slightly smaller than the outer diameter of the electrolytic capacitor 5, and the slight stretching required for the dustproof insulating ring 8 to be sleeved on the electrolytic capacitor 5 is met.

[0028] The fixed clamping hoop 9 is provided with a gap, and clamping holes are arranged on the regions of the fixed clamping hoop 9 on both sides of the gap, the regions of the fixed clamping hoop 9 on both sides of the gap are connected firmly by the bolt 10 and the nut, so that the fixed clamping hoop 9 is clamped after being sleeved on the electrolytic capacitor 5. Meanwhile, the fixed clamping hoop 9 is also provided with a riveting hole, and a riveting hole is also arranged on the baffle 7 correspondingly, and the fixed clamping hoop 9 and the baffle 7 are pressed tightly by the bolt 10 and the nut, so that the dustproof insulating ring 8 between the fixed clamping hoop 9 and the baffle 7 is pressed tightly, and the effect of reliable sealing of the gap is achieved.

[0029] The riveting holes are arranged in multiple and distributed around the mounting hole of the fixed clamping hoop 9 and the baffle 7, so that the dustproof insulating ring 8 is subjected to uniform pressing force, and a better sealing effect is achieved. Figure 3 As shown in the preferred embodiment, the fixed clamping hoop 9 extends out an L-shaped fixed foot in the embodiment, the riveting hole is arranged on the fixed foot, so as to facilitate alignment with the riveting hole on the baffle 7, and the lower surface of the fixed foot is in direct contact with the fixed clamping hoop 9, thereby producing a pressing effect on the fixed clamping hoop 9.

[0030] During installation, the fixed clamping hoop 9 is fixed on the electrolytic capacitor 5 by the bolt 10 and the nut by using a tooling jig; the electrolytic capacitor 5 is placed upside down, and the dustproof insulating ring 8 is sleeved on the upside-down electrolytic capacitor 5 from top to bottom. Since the dustproof insulating ring 8 is made of PC material, it has certain tension and expansion rate, and can be tightly sleeved on the electrolytic capacitor 5 and kept in a gapless fitting state with the electrolytic capacitor 5; the electrolytic capacitor 5 is adjusted from the upside-down state to the normal placement state, the center axis of the electrolytic capacitor 5 is aligned with the center of the mounting hole of the baffle 7 in the box body 1, and then the electrolytic capacitor 5 is passed through the baffle 7 from top to bottom until the lower surface of the dustproof insulating ring 8 is attached to the upper surface of the baffle 7, and the lower surface of the fixed clamping hoop 9 is attached to the upper surface of the dustproof insulating ring 8; the riveting hole of the fixed clamping hoop 9 is aligned with the riveting hole on the baffle 7 by rotating the electrolytic capacitor 5, and then the bolt 10 is locked and fixed with appropriate torque. In this way, the dustproof insulating ring 8 is pressed and fixed by the multiple fixed feet of the fixed clamping hoop 9, so as to prevent external dust from entering the device cavity 2 from the mounting gap of the electrolytic capacitor 5, and the dustproof purpose is achieved.

[0031] Any combination of the technical features of the above embodiments can be made, and in order to make the description concise, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0032] The above embodiments only express several implementation ways of the present application, and the description is specific and detailed, but it should not be understood as a limitation to the scope of the application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. An enhanced protection structure applied to a frequency converter, characterized in that, The frequency converter includes a housing, a device cavity, an air duct cavity, and an electrolytic capacitor disposed within the housing. The electrolytic capacitor is partially disposed within the air duct cavity and partially disposed within the device cavity. The electrolytic capacitor passes through mounting holes in a partition within the housing. The partition is used to isolate the air duct cavity from the device cavity. The enhanced protection structure applied to the frequency converter includes a dustproof insulating ring and a fixing clamp. The dustproof insulating ring is sleeved on the electrolytic capacitor, and the fixing clamp is snapped onto the electrolytic capacitor. The first side surface of the dustproof insulating ring contacts the fixing clamp, and the second side surface of the dustproof insulating ring contacts the fixing clamp. The fixing clamp is locked to the partition to press the dustproof insulating ring tightly and seal the gap between the electrolytic capacitor and the mounting hole.

2. The enhanced protection structure applied to a frequency converter according to claim 1, characterized in that, The dustproof insulating ring is made of high-temperature resistant insulating PC material.

3. The enhanced protection structure applied to a frequency converter according to claim 1, characterized in that, The outer diameter of the dustproof insulating ring is larger than the diameter of the mounting hole, and the inner diameter of the dustproof insulating ring is equal to the outer diameter of the electrolytic capacitor, or is an interference fit with the electrolytic capacitor.

4. The enhanced protection structure applied to a frequency converter according to claim 1, characterized in that, The fixing clamp has a notch, and clamping holes are provided on the fixing clamp areas on both sides of the notch. The fixing clamp areas on both sides of the notch are connected by bolts and nuts passing through the clamping holes.

5. The enhanced protection structure applied to a frequency converter according to claim 1, characterized in that, The fixing clamp is also provided with a rivet hole, and the partition plate is also provided with a corresponding rivet hole. The fixing clamp is connected to the partition plate by bolts and nuts passing through the rivet holes, so that the dustproof insulating ring is pressed tight.

6. The enhanced protection structure applied to a frequency converter according to claim 5, characterized in that, The riveting holes are provided in multiple locations and are distributed around the fixing clamp and the mounting holes around the partition.

7. A reinforced protection structure applied to a frequency converter according to claim 5 or 6, characterized in that, The fixing clamp has a fixing foot extending from it, the fixing clamp has a rivet hole located on the fixing foot, and the lower surface of the fixing foot is in contact with the fixing clamp.

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