Low-voltage frequency converter with waterproof and moistureproof assembly

Abstract

The utility model relates to the technical field of frequency converters, in particular to a low-voltage frequency converter with a waterproof and moistureproof assembly, which comprises a low-voltage frequency conversion box. The waterproof frame part is connected to the low-voltage frequency conversion box; the moisture-proof connector part is connected to the bottom of the low-voltage frequency conversion box, and the waterproof frame part comprises a U-shaped metal plate connected with the low-voltage frequency conversion box; the air inlet is formed in the top of the U-shaped metal plate; the air outlet is formed in the bottom of the U-shaped metal plate; the fan is arranged at the bottom of the air outlet. Through the assembly composed of the low-voltage frequency conversion box, the waterproof frame part and the moisture-proof connector part, a set of low-voltage frequency converter with multiple waterproof measures is provided for power users, and external dust, sprayed liquid and moisture cannot enter the frequency converter while good heat dissipation of the frequency converter in use is ensured, so that the service life of the frequency converter is prolonged. Meanwhile, elastic sealing waterproof and moistureproof measures are taken at the joint of the frequency converter electrically connected with the outside, so that the sealing moistureproof performance of the connection area between the outside and the frequency converter is further ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of frequency converters, in particular to a low-voltage frequency converter with waterproof and moisture-proof components. Background Art

[0002] Low-voltage frequency converters are commonly used for motor speed control. They often work in more complex industrial environments. In various equipment such as fans, pumps, compressors, conveyors, etc., they can adjust the speed of the motor to achieve precise control of the equipment and improve production efficiency and automation level.

[0003] During the use of existing low-voltage inverters in work-assisting environments, in order to maintain heat dissipation and cooling and to be connected to external equipment lines, the performance of the inverter is limited and it is easily damaged by external splashing liquids and moisture. Therefore, a low-voltage inverter with waterproof and moisture-proof components is proposed to provide power users with a set of low-voltage inverters with multiple waterproof measures. While ensuring that the inverter is used with better heat dissipation, external dust, spraying liquid, and moisture cannot enter the interior of the inverter, ensuring the waterproof and moisture-proof effect between the outside world and the inverter. Utility Model Content

[0004] In view of the problems in the prior art, the utility model provides a low-voltage inverter with waterproof and moisture-proof components to provide power users with a set of low-voltage inverters with multiple waterproof measures. While ensuring better heat dissipation during use of the inverter, it can prevent external dust, spray liquid, and moisture from entering the interior of the inverter, thereby ensuring the waterproof and moisture-proof effect between the outside world and the inverter.

[0005] The technical solution adopted by the utility model to solve the technical problem is a low-voltage inverter with waterproof and moisture-proof components, including:

[0006] Low voltage frequency converter box;

[0007] The waterproof frame is connected to the low voltage frequency conversion box;

[0008] Moisture-proof joint, connected to the bottom of the low-voltage frequency converter box.

[0009] By adopting the above technical scheme, through the components consisting of a low-voltage frequency converter box, a waterproof frame part and a moisture-proof joint part, it is possible to provide power users with a set of low-voltage frequency converters with multiple waterproof measures. While ensuring that the frequency converter can obtain better heat dissipation during use, it can prevent external dust, spray liquid and moisture from entering the interior of the frequency converter. At the same time, elastic sealing waterproof and moisture-proof measures are taken for the joints where the frequency converter is electrically connected to the outside world, further ensuring the sealing and moisture-proof properties of the connection area between the outside world and the frequency converter.

[0010] Specifically, the waterproof frame portion includes:

[0011] U-shaped sheet metal, connected to the low voltage inverter box;

[0012] The air inlet is opened at the top of the U-shaped sheet metal;

[0013] The exhaust vent is opened at the bottom of the U-shaped sheet metal;

[0014] The fan is arranged at the bottom of the air outlet and connected to the U-shaped sheet metal.

[0015] By adopting the above technical solution, an external heat dissipation structure is provided for the low-voltage frequency converter box through the waterproof frame part, so as to cool the frequency converter equipment without contacting the electrical components inside the frequency converter box, thereby ensuring the protectiveness of use.

[0016] Specifically, side panels are provided on both sides of the U-shaped sheet metal, and the side panels are riveted to the U-shaped sheet metal by bolts. Heat dissipation fins are connected to the inner sides of the side panels, and the heat dissipation fins are perpendicular to the air inlet and the air outlet. The side panels are in close contact with the low-voltage frequency conversion box.

[0017] By adopting the above technical solution, the contact area between the low-voltage frequency conversion box and the external air is increased through the side plates and the heat dissipation fins thereon, so that the heat dissipation efficiency of the low-voltage frequency conversion box is improved.

[0018] Specifically, the moisture-proof joint portion includes:

[0019] External thread terminal connector, connected to the low voltage frequency converter box;

[0020] A waterproof cover structure is arranged on the outer periphery of the external thread terminal connector;

[0021] Internally threaded cap, connects to externally threaded terminal fittings.

[0022] By adopting the above technical solution, the moisture-proof joint portion can improve the sealing performance of the plug-in end of the external circuit thread during the connection with the low-voltage frequency conversion box.

[0023] Specifically, the external thread terminal connector is located at the center of the waterproof sleeve structure and does not contact the waterproof sleeve structure.

[0024] Specifically, the waterproof cover structure includes:

[0025] An annular rubber sleeve connected to the low voltage frequency conversion box;

[0026] An annular cavity is disposed in the annular rubber sleeve;

[0027] The spring is arranged in the annular cavity.

[0028] By adopting the above technical solution, the waterproof cover structure can stably elastically fit the external plug connector through the built-in spring and the external rubber structure, thereby ensuring the waterproof and moisture-proof effect.

[0029] The beneficial effects of the utility model are as follows: through the components consisting of a low-voltage frequency converter box, a waterproof frame part and a moisture-proof joint part, a set of low-voltage frequency converters with multiple waterproof measures is provided for power users. While ensuring that the frequency converter can obtain better heat dissipation, external dust, spray liquid and moisture cannot enter the interior of the frequency converter. At the same time, elastic sealing waterproof and moisture-proof measures are taken for the joints where the frequency converter is electrically connected to the outside, further ensuring the sealing and moisture-proof properties of the connection area between the outside world and the frequency converter, solving the problem that during the use of the existing low-voltage frequency converter in an auxiliary operation environment, in order to maintain heat dissipation and cooling and to be connected to external equipment lines, the performance of the frequency converter is limited and it is easily damaged by external splashing liquid and moisture. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0031] Figure 1 It is an overall schematic diagram of the utility model;

[0032] Figure 2 This is a schematic diagram of the top of the waterproof frame of the utility model;

[0033] Figure 3 This is a schematic diagram of the bottom of the waterproof frame of the utility model;

[0034] Figure 4 For the utility model Figure 3 The enlarged schematic diagram at A in the middle;

[0035] Figure 5 It is a schematic cross-sectional view of the annular rubber sleeve of the utility model;

[0036] In the figure: 1. Low-voltage frequency conversion box; 2. Waterproof frame; 201. U-shaped sheet metal; 202. Air inlet; 203. Air outlet; 204. Fan; 205. Side panel; 206. Heat dissipation fins; 3. Moisture-proof joint; 301. Externally threaded terminal joint; 302. Waterproof sleeve structure; 3021. Annular rubber sleeve; 3022. Annular cavity; 3023. Spring; 303. Internally threaded cap. DETAILED DESCRIPTION

[0037] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0038] In order to ensure the waterproof and moisture-proof effect of the inverter, Figure 1-5 As shown, the utility model discloses a low voltage inverter with waterproof and moisture-proof components, comprising:

[0039] Low voltage frequency conversion box 1;

[0040] The waterproof frame part 2 is connected to the low voltage frequency conversion box 1;

[0041] The moisture-proof joint portion 3 is connected to the bottom of the low-voltage frequency conversion box 1 .

[0042] When in use, a low-voltage inverter box 1, a waterproof frame part 2 and a moisture-proof joint part 3 are used to provide power users with a set of low-voltage inverters with multiple waterproof measures. While ensuring good heat dissipation during use of the inverter, external dust, spray liquid and moisture cannot enter the inverter. At the same time, elastic sealing waterproof and moisture-proof measures are taken for the joints where the inverter is electrically connected to the outside, further ensuring the sealing and moisture-proof properties of the connection area between the outside world and the inverter.

[0043] In order to improve the heat dissipation effect, for example, Figure 2 , 3 As shown, the utility model also includes that the waterproof frame part 2 includes:

[0044] U-shaped sheet metal 201, connected to the low voltage frequency conversion box 1;

[0045] The air inlet 202 is provided at the top of the U-shaped sheet metal 201;

[0046] The exhaust port 203 is provided at the bottom of the U-shaped sheet metal 201;

[0047] The fan 204 is disposed at the bottom of the air outlet 203 and connected to the U-shaped sheet metal 201 .

[0048] The power input end of the fan 204 is electrically connected to the power output end of the low-voltage frequency conversion box 1 through a wire, and the circuit of the fan 204 is arranged inside the low-voltage frequency conversion box 1, and waterproof glue is coated on the wiring of the fan 204.

[0049] When in use, the outside of the low-voltage frequency conversion box 1 is fixed by the U-shaped sheet metal 201 to serve as an installation support frame outside the low-voltage frequency conversion box 1 .

[0050] For example, Figure 1 As shown, the utility model also includes that side panels 205 are clamped on both sides of the U-shaped sheet metal 201, and the side panels 205 and the U-shaped sheet metal 201 are riveted by bolts, and the inner side of the side panels 205 is connected to the heat dissipation fins 206, and the heat dissipation fins 206 are perpendicular to the air inlet 202 and the air outlet 203, and the side panels 205 are in close contact with the low-voltage frequency conversion box 1.

[0051] When in use, the contact area between the surface of the low-voltage frequency conversion box 1 and the external air is increased by the arrangement of the side panels 205 and the heat dissipation fins 206. The exhaust of the fan 204 allows the air to fully contact the heat dissipation fins 206 while passing through the air inlet 202 and the air outlet 203, taking away the high temperature on the surface, so that the low-voltage frequency conversion box 1 can be externally cooled, thereby avoiding direct contact of dust, spray liquid, and moisture with the frequency conversion components, and improving the waterproof and moisture-proof effect.

[0052] In order to improve the sealing and moisture-proof effect of the circuit plug, for example, Figure 3 , 4 As shown, the utility model also includes that the moisture-proof joint part 3 includes:

[0053] External thread terminal connector 301, connected to low voltage frequency conversion box 1;

[0054] A waterproof cover structure 302 is arranged on the outer periphery of the external thread terminal connector 301;

[0055] The internal thread cap 303 is connected to the external thread terminal connector 301 .

[0056] When in use, the circuit connector required to be connected to the frequency converter is connected to the external thread terminal connector 301, so that the external circuit is electrically connected to the frequency converter. During this period, the external thread terminal connector 301 can be set to a direct plug-in type according to actual needs;

[0057] After the external circuit is plugged in, the end of the waterproof cover structure 302 is in close contact with the end of the plug connector of the external circuit to achieve sealing protection.

[0058] For example, Figure 4 As shown, the utility model also includes that the external thread terminal connector 301 is located at the center of the waterproof sleeve structure 302 and does not contact the waterproof sleeve structure 302 .

[0059] For example, Figure 4 , 5 As shown, the utility model also includes that the waterproof cover structure 302 includes:

[0060] The annular rubber sleeve 3021 is connected to the low voltage frequency conversion box 1;

[0061] The annular cavity 3022 is disposed in the annular rubber sleeve 3021;

[0062] The spring 3023 is disposed in the annular cavity 3022 .

[0063] The elastic force of the spring 3023 is smaller than the plugging resistance between the external connector and the external thread terminal connector 301 .

[0064] When the utility model is in use, the U-shaped sheet metal 201 is used to fix the outside of the low-voltage frequency conversion box 1 to serve as an installation support frame for the outside of the low-voltage frequency conversion box 1. The U-shaped sheet metal 201 is assembled in an electrical environment or in a power cabinet. When connected to the frequency converter circuit, the internal threaded cap 303 used for preliminary protection is first removed from the external threaded terminal connector 301, and the circuit connector required to be connected to the frequency converter is connected to the external threaded terminal connector 301, so that the external circuit is electrically connected to the frequency converter. After the external circuit is plugged in, the end of the waterproof cover structure 302 is in contact with the end of the plug connector of the external circuit to achieve sealing protection. Based on the spring 3023 inside the waterproof cover structure 302, The contact between the waterproof sleeve structure 302 and the end of the plug connector has a certain elastic force, so that the contact fit between the annular rubber sleeve 3021 of the waterproof sleeve structure 302 is better, ensuring sufficient moisture resistance at the joint. Through the arrangement of the side plate 205 and the heat dissipation fins 206, the contact area between the surface of the low-voltage frequency conversion box 1 and the external air is increased. Through the exhaust cooperation of the fan 204, the air is fully in contact with the heat dissipation fins 206 while passing through the air inlet 202 and the air outlet 203, taking away the surface high temperature, so that the low-voltage frequency conversion box 1 can obtain external heat dissipation, thereby avoiding direct contact of dust, spray liquid, and moisture with the frequency conversion components, and improving the waterproof and moisture-proof effect.

[0065] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. A low voltage inverter with waterproof and moisture-proof components, characterized in that: include: Low voltage frequency conversion box (1); A waterproof frame part (2) connected to the low voltage frequency conversion box (1); The moisture-proof joint part (3) is connected to the bottom of the low-voltage frequency conversion box (1).

2. A low voltage frequency converter with waterproof and moisture-proof components according to claim 1, characterized in that: The waterproof frame part (2) comprises: A U-shaped sheet metal (201) connected to the low-voltage frequency conversion box (1); An air inlet (202) is provided on the top of the U-shaped sheet metal (201); An air outlet (203) is provided at the bottom of the U-shaped sheet metal (201); The fan (204) is arranged at the bottom of the air outlet (203) and is connected to the U-shaped sheet metal (201).

3. A low voltage frequency converter with waterproof and moisture proof components according to claim 2, characterized in that: Side panels (205) are clamped on both sides of the U-shaped sheet metal (201), and the side panels (205) and the U-shaped sheet metal (201) are riveted together by bolts. The inner side of the side panels (205) is connected to a heat dissipation fin (206), and the heat dissipation fin (206) is perpendicular to the air inlet (202) and the air outlet (203). The side panels (205) are in close contact with the low-voltage frequency conversion box (1).

4. A low voltage frequency converter with waterproof and moisture proof components according to claim 3, characterized in that: The moisture-proof joint part (3) comprises: An external thread terminal connector (301) connected to a low voltage frequency conversion box (1); A waterproof sleeve structure (302) is arranged on the outer periphery of the external thread terminal connector (301); The internal thread cap (303) is connected to the external thread terminal connector (301).

5. A low voltage frequency converter with waterproof and moisture proof components according to claim 4, characterized in that: The external thread terminal connector (301) is located at the center of the waterproof sleeve structure (302) and does not contact the waterproof sleeve structure (302).

6. A low voltage frequency converter with waterproof and moisture proof components according to claim 5, characterized in that: The waterproof cover structure (302) comprises: An annular rubber sleeve (3021) connected to the low-voltage frequency conversion box (1); An annular cavity (3022) is disposed in the annular rubber sleeve (3021); The spring (3023) is arranged in the annular cavity (3022).

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