Split type air conditioner outdoor unit electrical box

Abstract

The utility model discloses a split type air conditioner outdoor unit electric appliance box, including the box body of top opening and cover the cover plate of opening, install frequency converter mounting panel on the bottom plate in the box body, install chip and electric capacity on frequency converter mounting panel, the cable in the box body passes through the wire hole and extends outside the box, still include radiating fan and radiating fin, and radiating fan is installed in the box body, and the through -hole is seted up on the box body bottom plate, and a part of radiating fin is located in the through -hole and is connected with frequency converter mounting panel, and another part extends outside the box, and the heat conduction copper column is connected between chip and frequency converter mounting panel, and the environment in the box body is isolated with the outside world. This electric appliance box can prevent dust and water, can reduce the temperature of electric capacity in the box body, reduces the chip temperature in the box body.

Description

Technical Field

[0001] This utility model belongs to the field of air conditioning technology, specifically relating to a split-type air conditioner outdoor unit electrical box with a waterproof and dustproof rating of IP55. Background Technology

[0002] The core electrical components of a split air conditioner outdoor unit, such as the control board, compressor driver, and filter board, are usually fixed on an electrical mounting plate, with the overall protection level typically being IPX4. In environments with high dust levels, frequent rain, or strong corrosive conditions, the existing electrical box structure is insufficient to prevent the penetration of fine dust and high-pressure rainwater. Dust accumulation may cause localized overheating or short circuits, or water seepage may lead to electrical leakage, affecting the normal operation of the unit.

[0003] Patent document (CN2012206909122) discloses an electrical control box structure and an outdoor air conditioning unit, which achieves isolation and protection by adding an electrical sealing cover to the electrical control box assembly. However, this solution has obvious shortcomings: the completely sealed space makes it difficult for the components inside the electrical box to dissipate heat, especially the capacitors that generate a lot of heat. Long-term operation in a high-temperature environment will significantly shorten their lifespan, thereby affecting the stability of the unit's operation. Summary of the Invention

[0004] To address the aforementioned issues of poor dust and water resistance and difficulty in heat dissipation in the electrical box, this utility model provides a split-type outdoor unit electrical box for air conditioners.

[0005] The split-type outdoor unit electrical box of this utility model includes a box body with an opening at the top and a cover plate covering the opening. An inverter mounting plate is installed on the bottom plate inside the box body. Chips and capacitors are installed on the inverter mounting plate. Cables inside the box body extend out of the box body through cable holes. The feature is that it also includes a cooling fan and heat dissipation fins. The cooling fan is installed inside the box body. A through hole is opened on the bottom plate of the box body. Part of the heat dissipation fins are located in the through hole and connected to the inverter mounting plate, and the other part extends out of the box body. A heat-conducting copper pillar is connected between the chip and the inverter mounting plate. The environment inside the box body is isolated from the outside environment.

[0006] Furthermore, the cooling fan is mounted on the inner wall of the box via a bracket, and the cooling fan is suspended in the air.

[0007] Furthermore, the bracket is composed of a horizontal plate and a vertical plate connected together. The vertical plate has mounting holes, and screws are spot-welded to the inner wall of the box. The bracket is installed in the box by passing the screws through the mounting holes and tightening them with nuts. The horizontal plate has through holes running vertically through it, and the cooling fan is installed in the through holes.

[0008] Furthermore, the cover and the box are sealed with a sealing strip, the heat dissipation fins are fixed in the through hole with sealant and the through hole is sealed, and the cable of the cooling fan extends out of the box through the cable hole and the cable hole is sealed with sealant.

[0009] Beneficial effects: This utility model achieves dust and water resistance by isolating the internal environment of the box from the external environment. A cooling fan inside the box circulates air and exchanges heat with the outside through the box walls, reducing the temperature of the capacitors inside. Heat dissipation fins extending from the box further reduce the temperature of the chips inside. The cooling fan is suspended in the air by a bracket mounted on the inner wall of the box, resulting in good heat dissipation. The bracket structure is designed for easy installation on the inner wall of the box and for convenient installation of the cooling fan. The cover and box are sealed with a sealing strip, and the through holes and wire holes are sealed with sealant, simplifying operation and ensuring complete isolation of the internal environment from the external environment. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of the electrical box of this utility model;

[0011] Figure 2 This is a bottom view of the electrical box of this utility model.

[0012] In the diagram, 1 is the housing; 2 is the cover plate; 3 is the cooling fan; 4 is the heat dissipation fins; 5 is the bracket; and 6 is the sealing strip. Detailed Implementation

[0013] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0014] like Figure 1-2 As shown, a split-type air conditioner outdoor unit electrical box includes a box body 1 with an opening at the top and a cover plate 2 covering the opening. An inverter mounting plate is installed on the bottom plate inside the box body 1. Chips and capacitors are installed on the inverter mounting plate. Cables inside the box body 1 extend out of the box through cable holes. The box body 1 is characterized by further including a cooling fan 3 and heat dissipation fins 4. The cooling fan 3 is installed inside the box body 1. A through hole is opened on the bottom plate of the box body 1. Part of the heat dissipation fins 4 are located in the through hole and connected to the inverter mounting plate, and the other part extends out of the box body 1. A heat-conducting copper pillar is connected between the chip and the inverter mounting plate. The environment inside the box body 1 is isolated from the outside.

[0015] Specifically, the cooling fan 3 is mounted on the inner wall of the housing 1 via a bracket 5, and the cooling fan 3 is suspended in the air. The bracket 5 is composed of a horizontal plate and a vertical plate connected together, for example, it is made of aluminum alloy sheet metal bent at 90°. The vertical plate has mounting holes, and screws are spot-welded to the inner wall of the housing 1. The screws are passed through the mounting holes and tightened with nuts to install the bracket 5 inside the housing 1. The horizontal plate has through holes running vertically through it, and the cooling fan 3 is mounted on the through holes.

[0016] A sealing strip 6 is provided on the upper edge of the box 1. The cover plate 2 and the box 1 are sealed by the sealing strip 6. The heat dissipation fins 4 are fixed in the through hole by sealant and the through hole is sealed by sealant. The cable of the cooling fan 3 extends out of the box 1 through the cable hole and the cable hole is sealed by sealant.

[0017] In practical use, the housing 1 is made of aluminum alloy sheet metal bending and welding process, with all welds on all four sides being fully welded. Through holes for mounting the compressor driver heat sink fins 4 and wiring holes for electrical components are provided on the housing 1. These through holes are located on the bottom plate of the housing 1, on which a frequency converter mounting plate is installed. Then, the main control board, compressor driver, filter board, and other commonly used electrical components are installed into the housing 1. Thermally conductive copper pillars are connected between the compressor driver chip and the frequency converter mounting plate; specifically, the two ends of the thermally conductive copper pillars are glued to the chip and the frequency converter mounting plate respectively using thermally conductive silicone. The heat sink fins 4 are installed in the through holes using sealant, and the through holes are sealed with sealant, so that part of the heat sink fins 4 is connected to the frequency converter mounting plate, and part extends out of the housing. Two screws are spot-welded to the inner wall of one side of the housing 1, and a bracket 5 is installed on the screws. The cooling fan 3 is then installed on the bracket 5. A sealing strip 6 is glued to the upper edge of the housing 1 for sealing with the cover plate 2. All wiring holes and other openings are sealed with sealant (such as silicone sealant or fireproof putty). After the electrical box cover 2 is closed, the entire electrical box is completely sealed, effectively preventing dust and water from entering and achieving an IP55 protection rating.

[0018] Inside the electrical box, the compressor driver generates the most heat, primarily from the chips and capacitors, whose temperatures significantly impact driver performance. To address chip cooling, heat sink fins 4 extend outside the electrical box. Utilizing air convection generated by an external fan, external air exchanges heat effectively with the heat sink fins 4, rapidly removing heat and lowering the chip temperature. For capacitor cooling, a cooling fan 3 is installed inside the electrical box. The fan facilitates heat conduction between the air inside the box and the metal casing. Heat absorbed by the casing is released through natural convection (contact with external air) and radiation (radiation to the outside), forming a complete heat dissipation chain: "component → air → box → outside." This significantly reduces capacitor temperature, ensuring stable internal temperature and maintaining the overall temperature within the electrical box within a reasonable range. This precisely solves the heat dissipation challenges of different components, ensuring stable operation of electrical components and improving the reliability and lifespan of the outdoor air conditioning unit in complex environments.

[0019] Unless otherwise specified, all technologies mentioned above refer to existing technologies.

[0020] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification.

Claims

1. A split-type air conditioner outdoor unit electrical box, comprising a box body with an opening at the top and a cover plate covering the opening, an inverter mounting plate mounted on the bottom plate inside the box body, a chip and a capacitor mounted on the inverter mounting plate, and cables inside the box extending outside the box through cable holes, characterized in that, It also includes a cooling fan and heat dissipation fins. The cooling fan is installed inside the box, and a through hole is opened on the bottom plate of the box. Part of the heat dissipation fins are located in the through hole and connected to the inverter mounting plate, while the other part extends out of the box. A heat-conducting copper pillar is connected between the chip and the inverter mounting plate, and the environment inside the box is isolated from the outside.

2. The split-type air conditioner outdoor unit electrical box according to claim 1, characterized in that, The cooling fan is mounted on the inner wall of the box via a bracket, and the cooling fan is suspended in the air.

3. The split-type air conditioner outdoor unit electrical box according to claim 2, characterized in that, The bracket consists of a horizontal plate and a vertical plate connected together. The vertical plate has mounting holes, and screws are spot-welded to the inner wall of the box. The bracket is installed inside the box by passing the screws through the mounting holes and tightening them with nuts. The horizontal plate has through holes running vertically through it, and the cooling fan is installed in the through holes.

4. The split-type air conditioner outdoor unit electrical box according to claim 3, characterized in that, The cover and the box are sealed with a sealing strip. The heat dissipation fins are fixed in the through hole with sealant and the through hole is sealed. The cable of the cooling fan extends out of the box through the cable hole and the cable hole is sealed with sealant.

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