A frequency converter capable of preventing water from entering a screw hole

Abstract

The utility model discloses a prevent screw hole water's frequency converter relates to frequency converter technical field, including upper cover, bottom shell, set up first screw hole on the upper cover, set up second screw hole on the bottom shell, screw on the first screw hole and second screw hole is tightened, the upper cover includes first sealing end face, the bottom shell includes second sealing end face, and the compression surface between first sealing end face and second sealing end face has sealing washer, and the upper water channel, ring concave water channel, water channel are formed with the intercommunication between first screw hole and second screw hole, and the level of second sealing end face is higher than the level of water channel. After frequency converter is drenched, the water flow that enters screw hole will only flow through upper water channel, ring concave water channel, water channel in proper order, and the level of second sealing end face is higher than the level of water channel, so even if the situation of sealing washer failure occurs, the water flow also can not flow into frequency converter chamber, but is discharged from water channel.

Description

Technical Field

[0001] This utility model relates to the field of frequency converter technology, and more specifically to a frequency converter that prevents water from entering through the screw holes. Background Technology

[0002] Existing frequency converters include a top cover and a bottom shell. Screws are tightened into the screw holes of the top cover and the bottom shell to securely connect them. To prevent water from entering the inverter's chamber and damaging the circuitry, sealing gaskets are also provided on the end faces of the top cover and the bottom shell.

[0003] However, since frequency converters are generally installed outdoors and are frequently exposed to rain, water can easily enter the frequency converter chamber through the screw holes and damage the circuitry if the gasket fails. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a frequency converter that prevents water from entering through the screw holes, so as to overcome the defect in the prior art where water enters the frequency converter chamber through the screw holes and damages the circuit.

[0005] To solve the above-mentioned technical problems, the present invention provides a frequency converter for preventing water ingress through screw holes, comprising an upper cover and a bottom shell, a first screw hole on the upper cover, a second screw hole on the bottom shell, and screws tightened into the first and second screw holes; the upper cover includes a first sealing end face, and the bottom shell includes a second sealing end face, with a sealing gasket on the pressing surface between the first and second sealing end faces; a communicating water inlet channel, an annular concave water channel, and a water outlet channel are formed between the first and second screw holes, and the horizontal plane of the second sealing end face is higher than the horizontal plane of the water outlet channel.

[0006] The upper cover further includes a first end face, and the bottom shell further includes a second end face.

[0007] Wherein, the horizontal plane of the first sealing end face is higher than the horizontal plane of the first end face.

[0008] The horizontal plane of the second sealing end face is higher than the horizontal plane of the second end face.

[0009] The first sealing end face and the first end face together form a first L-shaped end face.

[0010] The second sealing end face and the second end face together form a second L-shaped end face.

[0011] Compared with the prior art, the beneficial effect of this utility model is that the first sealing end face and the second sealing end face form a sealed inverter chamber; then the water inlet channel, the annular concave water channel and the water outlet channel formed between the first screw hole and the second screw hole ensure that after the inverter is rained on, the water entering the screw hole will only flow through the water inlet channel, the annular concave water channel and the water outlet channel in sequence. In addition, the horizontal plane of the second sealing end face is higher than the horizontal plane of the water outlet channel. Therefore, even if the sealing gasket fails, the water will not flow into the inverter chamber, but will be discharged from the water outlet channel. Attached Figure Description

[0012] Figure 1 This is an exploded structural diagram of the frequency converter of this utility model;

[0013] Figure 2 This is a first cross-sectional view of the inverter of this utility model;

[0014] Figure 3 This is a second cross-sectional view of the inverter of this utility model;

[0015] Figure 4 This is a schematic diagram of the upper cover structure of the frequency converter of this utility model;

[0016] Figure 5 This is a schematic diagram of the bottom shell structure of the frequency converter of this utility model;

[0017] Figure 6 yes Figure 2 Enlarged structural diagram of section A in the middle;

[0018] Figure 7 yes Figure 3 A magnified structural diagram of section B. Detailed Implementation

[0019] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0020] The inverter in this embodiment that prevents water from entering the screw holes is as follows: Figures 1-7As shown, the system includes an upper cover 1 and a bottom shell 2. A first screw hole 3 (without threads) is provided on the upper cover, and a second screw hole 4 (with threads) is provided on the bottom shell. Screws are tightened into the first and second screw holes to ensure that the first and second sealing end faces are pressed together. The upper cover includes a first sealing end face 5, and the bottom shell includes a second sealing end face 6. The upper cover also includes a first end face 7, and the bottom shell also includes a second end face 8. The horizontal plane L1 of the first sealing end face is higher than the horizontal plane L2 of the first end face. The horizontal plane L3 of the second sealing end face is higher than the horizontal plane L4 of the second end face. The first sealing end face and the second end face form a first L-shaped end face 9. The second sealing end face and the second end face form a second L-shaped end face 10. The pressing surface between the first and second sealing end faces has a sealing gasket 11, thus forming a sealed inverter chamber 12, in which electronic components 13 are located. A water inlet channel 14, annular concave water channel 15, and water outlet channel 16 are formed between the first screw hole and the second screw hole, and the horizontal plane of the second sealing end face is higher than the horizontal plane L5 of the water outlet channel.

[0021] In this embodiment, the first sealing end face, the second sealing end face, and the sealing gasket constitute a sealed inverter chamber, which is further fixed and tightened by screws and screw holes. Then, the water inlet channel, the annular concave water channel, and the water outlet channel formed between the first screw hole and the second screw hole ensure that after the inverter is rained on, the water entering the screw hole will only flow through the water inlet channel, the annular concave water channel, and the water outlet channel in sequence. In addition, the horizontal plane of the second sealing end face is higher than the horizontal plane of the water outlet channel. Therefore, even if the sealing gasket fails, the water will not flow into the inverter chamber, but will be discharged from the water outlet channel.

[0022] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A frequency converter for preventing water from entering through screw holes, comprising an upper cover, a bottom shell, a first screw hole on the upper cover, a second screw hole on the bottom shell, and screws tightened in the first screw hole and the second screw hole; Its features are: The top cover includes a first sealing end face, and the bottom shell includes a second sealing end face. The pressing surface between the first sealing end face and the second sealing end face has a sealing gasket. A water inlet channel, an annular concave water channel, and a water outlet channel are formed between the first screw hole and the second screw hole. The horizontal plane of the second sealing end face is higher than the horizontal plane of the water outlet channel.

2. The frequency converter for preventing water ingress through the screw hole according to claim 1, characterized in that: The top cover also includes a first end face, and the bottom shell also includes a second end face.

3. The frequency converter for preventing water ingress into the screw hole according to claim 2, characterized in that: The horizontal plane of the first sealing end face is higher than the horizontal plane of the first end face.

4. The frequency converter for preventing water ingress into the screw hole according to claim 3, characterized in that: The horizontal plane of the second sealing end face is higher than the horizontal plane of the second end face.

5. The frequency converter for preventing water ingress into the screw hole according to claim 4, characterized in that: The first sealing end face and the first end face form a first L-shaped end face.

6. The frequency converter for preventing water ingress into the screw hole according to claim 5, characterized in that: The second sealing end face and the second end face form a second L-shaped end face.

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