High-sealing frequency converter for pump

Abstract

The utility model discloses a high-sealing pump frequency converter, which is characterized in that an annular sealing gasket is arranged at the joint of a shell and a cover body of the frequency converter, a waterproof sealing structure is arranged at the joint of the shell and the cover body, a flame-retardant plate and a moisture absorption cotton layer are further sleeved on a capacitor, and a water absorption cotton layer is further arranged on the capacitor. The moisture absorption cotton layer and the water absorption cotton layer extend into gaps among the fins of the heat dissipation piece; according to the frequency converter for the pump, the closed cavity and the heat dissipation cavity are formed through the partition plate, the C-shaped groove and the cover body folded plate structure are arranged, so that external water is difficult to directly enter the shell from the mounting opening, water and dust are further prevented from entering through the arrangement of the sealing gasket, the panel film, the moisture absorption cotton layer, the cable waterproof connector and the like, and the service life of the frequency converter is prolonged. And the water absorption cotton layer and the moisture absorption cotton layer are also used for accelerating water evaporation of the cotton layers through heat of the heat dissipation piece and the fan, so that water removal in the heat dissipation cavity is accelerated, and the influence of accumulated water in the frequency converter caused by the working environment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of water pump frequency converters, in particular to a high-sealed frequency converter for a pump. Background Art

[0002] The inverter for pumps plays a very important role in the water supply system. In the prior art, the inverter has been optimized according to its operating conditions. For example, the prior art CN202122230906.0 is an inverter provided with a flame retardant layer. Considering the problems existing in the operation of the existing inverter structure, improvements are made by setting a flame retardant layer to wrap the capacitor instead of the limit fixation of the fixed plate. However, during use, users found that the prior art still has problems. When the pump inverter is used in a relatively humid usage scenario, due to the high humidity of the surrounding environment, water vapor will enter the open heat dissipation cavity from the flame retardant layer, and water will accumulate under the heat sink. After a period of use, it was found that there was still some dust inside. Therefore, in response to the above problems, a new type of waterproof and dustproof pump inverter is designed to meet the requirements of the prior art. Utility Model Content

[0003] In view of the prior art, the purpose of the utility model is to provide a pump inverter with a fully sealed effect, which improves the environmental adaptability of the inverter, reduces the impact of the humid environment of the pump on it, and increases its service life by fully sealing and isolating the circuit board structure with waterproofing requirements in the inverter, and setting up multiple waterproof components for protection.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is: a highly sealed frequency converter for a pump, comprising a box-shaped shell, a cover body for closing the shell opening, and a circuit board. The inner cavity of the shell is formed into a heat dissipation cavity with a heat dissipation mesh port by setting a partition. After the partition is separated, the space on the other side of the heat dissipation cavity cooperates with the cover body to form a sealed isolation chamber. The circuit board is arranged in the sealed isolation chamber, and a capacitor extending into the heat dissipation cavity is arranged on the circuit board. An annular sealing gasket is clamped at the connection between the shell and the cover body. A flame retardant plate and a hygroscopic cotton layer are also covered on the capacitor. The flame retardant plate and the hygroscopic cotton layer are respectively located on both sides of the partition, and the hygroscopic cotton layer also extends into the gap between the fins of the heat sink.

[0005] As a further configuration of the above solution, the partition is also provided with a limiting hole for the capacitor to pass through and a clearance hole for the heat sink of the circuit board to pass through.

[0006] As a further configuration of the above scheme, the inner wall of the heat dissipation cavity is also provided with a water-absorbing cotton layer extending into the gap between the fins of the heat dissipation element, and the other side of the heat dissipation cavity relative to the heat dissipation element and the heat dissipation mesh port is also provided with an exhaust fan.

[0007] As a further setting of the above solution, there is an inclined surface drop between a section of the moisture-absorbing cotton layer extending into the gap between the fins of the heat dissipating member and a section sleeved on the capacitor.

[0008] As a further setting of the above solution, a C-shaped groove plate is extended and provided at the edge of the housing to form a water guiding inclined groove with an outward opening. The C-shaped groove plate includes a water guiding inclined surface and a vertical section.

[0009] As a further setting of the above solution, the cover body includes a flat plate located at the opening of the housing and a waterproof folding plate extended from the edge of the flat plate. The waterproof folding plate covers the outside of the C-shaped groove plate and is arranged to cover the vertical section at the lower end. The annular sealing gasket is clamped between the flat plate and the C-shaped groove plate, and a bolt fixing head is arranged in the water guiding inclined groove.

[0010] As a further setting of the above solution, an operation panel assembly is provided on the cover body, a panel film is pasted on the outer side surface of the cover body, and a cable waterproof joint is also provided on the sealed isolation chamber.

[0011] Beneficial effects: The pump frequency converter of the present utility model divides the inner cavity into two parts, a sealed part and a heat dissipating part, by the setting of the partition plate. A C-shaped groove and a cover body folding plate structure are provided between the housing and the cover body, so that external water liquid is difficult to directly enter the housing from the installation opening. Through the settings of the sealing gasket, the panel film, the moisture-absorbing cotton layer and the cable waterproof joint, etc., the prevention of water and dust entering is further improved, thereby improving the working environment of the circuit board. An absorbent cotton layer extending to the heat dissipating member is provided to cooperate with the moisture-absorbing cotton layer. Through the heat of the heat dissipating member and the fan, the moisture of the cotton layer is accelerated to evaporate, and the moisture in the heat dissipating cavity is quickly removed, reducing the influence of the accumulated water inside the frequency converter caused by the working environment. Brief Description of the Drawings

[0012] Figure 1 It is a schematic structural diagram of the frequency converter of the present utility model.

[0013] Figure 2 It is a schematic internal structural diagram of the frequency converter of the present utility model.

[0014] Figure 3 It is a schematic partial structural diagram of the components of the frequency converter of the present utility model.

[0015] Figure 4 It is a schematic installation structural diagram of the cover body and the housing of the frequency converter of the present utility model ( Figure 4 a is a sectional view of the installation structure, Figure 4 b is a side view of the installation structure).

[0016] Reference numerals: 1, housing; 11, heat dissipation mesh opening; 13, heat dissipation cavity; 14, sealed isolation chamber; 15, partition; 18, C-shaped groove plate; 2, cover body; 21, panel film; 22, annular gasket; 24, bolt fixing head; 23, water guiding inclined groove; 231, vertical section; 232, water guiding inclined surface; 27, flat plate; 28, waterproof folding plate; 3, cable waterproof joint; 41, water absorption cotton layer; 42, moisture absorption cotton layer; 43, flame retardant plate; 48, exhaust fan; 61, heat dissipation member; 8, circuit board; 81, capacitor; 82, limiting hole; 83, relief hole. Detailed implementation mode

[0017] In order to more clearly understand the above-mentioned objects, features and advantages of the present utility model, the present utility model will be further described in detail below with reference to the drawings and specific implementation modes. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0018] As Figures 1-4 As shown in the figure, a highly sealed pump inverter of the present utility model includes a box-shaped housing 1, a cover body 2 for closing the opening of the housing 1, and a circuit board 8 arranged inside the housing 1. The inner cavity of the housing 1 forms a heat dissipation cavity 13 with a heat dissipation mesh opening 11 through the arrangement of a partition 15. The space on the other side of the partition 15 opposite to the heat dissipation cavity 13 cooperates with the cover body 2 to form a sealed isolation chamber 14. The circuit board 8 is arranged inside the sealed isolation chamber 14, and a capacitor 81 extending into the heat dissipation cavity 13 is arranged on the circuit board 8. An annular gasket 22 is clamped at the connection between the housing 1 and the cover body 2. A flame retardant plate 43 and a moisture absorption cotton layer 42 are also sleeved on the capacitor 81. The flame retardant plate 43 and the moisture absorption cotton layer 42 are respectively located on both sides of the partition 15, and the moisture absorption cotton layer 42 also extends into the gap between the fins of the heat dissipation member 61.

[0019] As a further setting of the above solution, the partition 15 is also provided with a limiting hole 82 for the capacitor 81 to pass through and a relief hole 83 for the heat dissipation member 61 of the circuit board 8 to pass through.

[0020] As a further setting of the above solution, a water absorption cotton layer 41 extending into the gap between the fins of the heat dissipation member 61 is also arranged on the inner wall of the heat dissipation cavity 13, and an exhaust fan 48 is also arranged on the other side of the heat dissipation cavity 13 relative to the heat dissipation member 61 and the heat dissipation mesh opening 11.

[0021] As a further setting of the above solution, a slope drop is arranged between a section of the moisture absorption cotton layer 42 extending into the gap between the fins of the heat dissipation member 61 and a section sleeved on the capacitor 81.

[0022] As a further setting of the above solution, a C-shaped groove plate 18 is extended and provided at the edge of the housing 1 to form a water guide chute 23 with an outward opening. The C-shaped groove plate 18 includes a water guide inclined surface 232 and a vertical section 231.

[0023] As a further setting of the above solution, the cover 2 includes a flat plate 27 at the opening of the housing 1 and a waterproof folding plate 28 extended from the edge of the flat plate 27. The waterproof folding plate 28 is wrapped outside the C-shaped groove plate 18 and is arranged to cover the vertical section 231 at the lower end. The annular gasket 22 is clamped between the flat plate 27 and the C-shaped groove plate 18, and a bolt fixing head 24 is arranged in the water guide chute 23. Refer to Figure 4 in Figure 4 a is a sectional view of the installation structure at the bolt fixing head 24, Figure 4 b is a side view of the water guide chute 23 of the installation structure.

[0024] As a further setting of the above solution, an operation panel assembly is arranged on the cover 2, a panel film 21 is pasted on the outer side surface of the cover 2, and a cable waterproof joint 3 is also arranged on the sealed isolation chamber 14

[0025] A highly sealed pump inverter of this embodiment, such as Figure 2 shown, includes a box-shaped housing 1, a cover 2 for closing the opening of the housing 1, and a circuit board 8 arranged inside the housing 1. Among them, the inner cavity of the housing 1 of this embodiment forms a heat dissipation cavity 13 with a heat dissipation mesh opening 11 through the arrangement of a partition 15, and a sealed isolation chamber 14 formed by the space on the other side of the partition 15 separated from the heat dissipation cavity 13 and cooperating with the cover 2. The circuit board 8 is bolt-fixed on the partition 15 and is installed in the sealed isolation chamber 14. And the capacitor 81 of the circuit board 8 will generate a certain amount of heat during operation. For the sealed isolation chamber 14, this part of the heat needs to be reduced as much as possible. Therefore, a number of limiting holes 82 are also correspondingly arranged on the partition 15, so that the capacitor 81 passes through the partition 15 and extends into the heat dissipation cavity 13;

[0026] Further, in order to achieve the waterproof and dustproof effect in this embodiment, one is to improve its installation structure, including ① a C-shaped groove plate 18 is extended and provided at the edge of the housing 1 to form a water guide chute 23 with an outward opening. The C-shaped groove plate 18 includes a water guide inclined surface 232 and a vertical section 231; ② the cover 2 includes a flat plate 27 at the opening of the housing 1 and a waterproof folding plate 28 extended from the edge of the flat plate 27. The waterproof folding plate 28 is wrapped outside the C-shaped groove plate 18 and is arranged to cover the vertical section 231 at the lower end; ③ the annular gasket 22 is clamped between the flat plate 27 and the C-shaped groove plate 18, and a bolt fixing head 24 is arranged in the water guide chute 23; ④ a panel film 21 is pasted on the outer side surface of the cover 2; ⑤ a cable waterproof joint 3 is also arranged on the sealed isolation chamber 14.

[0027] Through the combined settings of ① and ② above, and considering that the frequency converter is generally installed with the operation panel facing up, therefore, for the external water liquid to enter from the outside to the inside, it needs to enter from below the waterproof folding plate 28 at least, surge upward along the vertical section 231 into the water guiding inclined groove 23, and fill the water guiding inclined groove 23 before entering the installation gap between the flat plate 27 and the C-shaped groove plate 18 from the outermost side, and pass through the annular gasket 22 to enter the sealed isolation chamber 14. During this process, as the last sealing layer, the annular gasket 22 will be obstructed by the C-shaped groove plate shape, the water guiding inclined surface 232, and the vertical section 231 for the inflow of water liquid;

[0028] In addition, the cable waterproof joint 3 and the panel film 21 with a waterproof adhesive layer can both prevent water seepage from the gaps at their installation positions. Combining the above, for the cover body 2 and the housing 1 of this embodiment, during installation, the bolt fixing head 24 is fixedly connected to the C-shaped groove plate 18 in advance and then installed and fixed by tightening the bolt from the outside.

[0029] As a further setting of the above solution, in addition to the full sealing of the sealed isolation chamber 14 in this embodiment, for the heat generation problem of the power components, a heat dissipation member 61 is provided to extend into the sealed isolation chamber 14 from the relief hole 83 of the partition plate 15. The relief hole 83 is closed by clamping a sealing gasket between the heat dissipation member 61 and the partition plate 15. The heat dissipation member 61 transfers the heat out of the sealed isolation chamber 14 through heat conduction. A gap is formed on the part of the heat dissipation member 61 located in the heat dissipation cavity 13 to form fins. An exhaust fan 48 is provided on one side to accelerate air flow for heat dissipation. A moisture-absorbing cotton layer 42 is sleeved on the capacitor 81, and a water-absorbing cotton layer 41 is provided in the heat dissipation cavity 13. Both the water-absorbing cotton layer 41 and the moisture-absorbing cotton layer 42 are extended into the gaps between the fins of the heat dissipation member 61.

[0030] With the above structural settings, this embodiment provides a water-absorbing cotton layer 41. As shown, the housing 1 is provided with a heat dissipation mesh opening 11, which also causes the external water liquid to easily enter and condense inside along with the air, or directly drip into it under the action of external wind. When there are a lot of water droplets, it is easy to form ponding. The water-absorbing cotton layer 41 can absorb this part of the water droplets and be discharged faster through being attached to the fin part of the heat dissipation member 61 and the accelerated air flow of the fan; while the moisture-absorbing cotton layer 42 mainly absorbs the water liquid in the air, especially blocks the moisture entering from the limiting hole 82. And the position where the moisture-absorbing cotton layer 42 of this embodiment extends into the fin gap of the heat dissipation member 61 is closer to the circuit board 8 and has a higher contact temperature. It can not only accelerate the evaporation of the moisture in the cotton layer and keep the moisture-absorbing effect dry faster, but also take away the heat of the heat dissipation member 61 through the evaporation of the water liquid, and can also improve its heat dissipation effect;

[0031] As a further setting of the above solution, a slope drop is provided between a section of the moisture-absorbing cotton layer 42 extending into the gap between the fins of the heat sink 61 and a section sleeved on the capacitor 81. As Figure 3 shown, a ventilation duct is left between the moisture-absorbing cotton layer 42 and the fin base of the heat sink 61. The moisture-absorbing cotton layer 42 is connected by a slope. On the one hand, it maintains the easy penetration of moisture from wet to dry, and the height difference can also improve the effect. On the other hand, the ventilation duct enables the exhaust air flow of the exhaust fan 48 to directly act on the cotton layer near the capacitor 81, making the moisture on it more likely to flow towards the heat sink 61 side, and can cool this part of the moisture-absorbing cotton layer 42, improving the cooling effect on the capacitor 81.

[0032] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A high-sealing frequency converter for pumps, comprising a box-shaped housing (1), a cover body (2) for closing the opening of the housing (1), and a circuit board (8). A heat dissipation cavity (13) with a heat dissipation mesh opening (11) is formed in the inner cavity of the housing (1) by arranging a partition board (15). The space on the other side of the partition board (15) relative to the heat dissipation cavity (13) after separation cooperates with the cover body (2) to form a sealed isolation chamber (14). The circuit board (8) is arranged in the sealed isolation chamber (14), and a capacitor (81) extending into the heat dissipation cavity (13) is arranged on the circuit board (8). It is characterized in that: A ring-shaped gasket (22) is clamped at the connection between the housing (1) and the cover (2). A flame-retardant board (43) and a moisture-absorbing cotton layer (42) are also sleeved on the capacitor (81). The flame-retardant board (43) and the moisture-absorbing cotton layer (42) are respectively located on both sides of the partition board (15), and the moisture-absorbing cotton layer (42) also extends into the gaps between the fins of the heat sink (61).

2. The high-sealing frequency converter for pumps according to claim 1, wherein: The partition board (15) is also provided with a limiting hole (82) for the capacitor (81) to pass through and a relief hole (83) for the heat sink (61) of the circuit board (8) to pass through.

3. The high-sealing frequency converter for pumps according to claim 1, characterized in that: An absorbent cotton layer (41) extending into the gaps between the fins of the heat sink (61) is also arranged on the inner wall of the heat dissipation cavity (13). A exhaust fan (48) is also arranged on the other side of the heat dissipation cavity (13) relative to the heat sink (61) and the heat dissipation mesh opening (11).

4. A highly sealed frequency converter for pumps according to claim 1, characterized in that: A slope drop is provided between a section of the moisture-absorbing cotton layer (42) extending into the gaps between the fins of the heat sink (61) and a section sleeved on the capacitor (81).

5. A highly sealed frequency converter for pumps according to claim 1, characterized in that: A C-shaped groove plate (18) extends from the edge of the housing (1) to form a water-conducting inclined groove (23) with an outward opening. The C-shaped groove plate (18) includes a water-conducting inclined surface (232) and a vertical section (231).

6. The high-sealing frequency converter for pumps according to claim 5, wherein: The cover (2) includes a flat plate (27) located at the opening of the housing (1) and a waterproof folding plate (28) extending from the edge of the flat plate (27). The waterproof folding plate (28) covers the outside of the C-shaped groove plate (18) and covers the vertical section (231) at the lower end.

7. The high-sealing frequency converter for pumps according to claim 6, wherein: The ring-shaped gasket (22) is clamped between the flat plate (27) and the C-shaped groove plate (18), and a bolt fixing head (24) is arranged in the water-conducting inclined groove (23).

8. A highly sealed pump frequency converter according to claim 1, characterized in that: An operation panel assembly is arranged on the cover (2). A panel film (21) is pasted on the outer side of the cover (2), and a cable waterproof joint (3) is also arranged on the sealed isolation chamber (14).

Images