CN214799266U

CN214799266U - Frequency converter

Info

Publication number: CN214799266U
Application number: CN202120322895.6U
Authority: CN
Inventors: 章云霖; 武宗祥; 李玉相
Original assignee: Suzhou Inovance Technology Co Ltd
Current assignee: Suzhou Inovance Technology Co Ltd
Priority date: 2021-02-04
Filing date: 2021-02-04
Publication date: 2021-11-19
Anticipated expiration: 2031-02-04

Abstract

The utility model provides a frequency converter, which comprises a case and a frequency conversion component, wherein the frequency conversion component comprises a main power loop, a main installation cavity formed by enclosing a partition plate is formed in the case, and the main power loop is installed in the main installation cavity; a drainage structure is formed on the partition board at the top of the main mounting cavity, and the drainage structure is used for receiving liquid dropping from the upper side of the main mounting cavity and guiding the liquid to a set area in the case or the outside of the case. The utility model discloses guide liquid to the outside of setting for region or quick-witted case by the drainage structure, reach the waterproof function to main installation cavity, ensure that liquid is difficult to get into main installation cavity, and need not to improve quick-witted case protection level, not only the cost is reduced, can also guarantee the ventilation of quick-witted incasement portion, improve the radiating effect to frequency conversion subassembly, and the drainage structure forms by the baffle, both simplified the structure, can not increase the dismouting degree of difficulty again, also can improve the space utilization of quick-witted incasement simultaneously, utensil high practicality.

Description

Frequency converter

Technical Field

The embodiment of the utility model provides a relate to power electronic equipment field, more specifically say, relate to a converter.

Background

The frequency converter is an electric power device which converts a power frequency power supply into an adjustable and controllable frequency power supply by utilizing the switch control of an industrial semiconductor device. Mainstream AC/DC/AC voltage type frequency converters in the market all comprise a main power circuit chamber, a bus capacitor chamber and other chambers, wherein important live-line components such as an input/output copper bar, a bus, a main power device, a circuit board and the like are distributed in the main power circuit chamber, so that the protection of the power circuit chamber on liquid needs to be improved. In order to improve the protection of a main power loop, a cavity of the existing frequency converter is generally made into a sealing type, so that water vapor and water dripping are directly isolated.

At present, the existing frequency converter generally adopts the protection grade of improving external structural members to carry out waterproof treatment on a main power loop chamber, and directly isolates liquid from entering the chamber. However, the anti-dripping structure of the existing frequency converter not only can greatly increase the cost, but also can cause no ventilation in the cavity, so that the temperature is higher, the heat dissipation and cooling of the frequency conversion assembly in the cavity are not facilitated, the space inside the frequency converter is not reasonably utilized, and the space utilization rate in the cavity is reduced.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a to the problem that the water repellent mode of above-mentioned current converter is with high costs, be unfavorable for the ventilation cooling in the chamber, do not have the space in the rational utilization chamber and space utilization is low, provide a new converter.

The embodiment of the utility model provides a solve above-mentioned technical problem's technical scheme is, provide a converter, including quick-witted case and frequency conversion subassembly, just frequency conversion subassembly includes main power return circuit, wherein: a main mounting cavity formed by enclosing of a partition plate is formed in the case, and the main power loop is mounted in the main mounting cavity; and a drainage structure is formed on the partition plate at the top of the main mounting cavity, and is used for receiving liquid dropping from the upper part of the main mounting cavity and guiding the liquid to a set area in the case or the outside of the case.

Preferably, the frequency conversion assembly includes a non-main power loop, an auxiliary installation cavity adjacent to the main installation cavity and located above the main installation cavity is formed in the chassis, the non-main power loop is installed in the auxiliary installation cavity, and the drainage structure is located on a partition plate between the main installation cavity and the auxiliary installation cavity.

Preferably, the frequency converter comprises a mounting plate through which the non-main power circuit is mounted in the secondary mounting cavity; the bracket plate is provided with a partition plate positioned between the main mounting cavity and the auxiliary mounting cavity, the case is provided with a liquid discharge hole communicated with the outside of the case, and the drainage structure guides liquid to the outside of the case through the liquid discharge hole.

Preferably, the partition plate at the top of the main mounting cavity and the chassis are integrally processed, a liquid discharge hole communicated to the outside of the chassis is formed in the chassis, and the liquid is guided to the outside of the chassis by the drainage structure through the liquid discharge hole.

Preferably, the drainage structure includes locating the bar groove on the baffle, the main part of baffle is from keeping away from the part of bar groove to the bar groove downward sloping, just at least partly with the outage is linked together of bar groove.

Preferably, the strip-shaped groove is adjacent to a first side edge of the partition plate, and the first side edge is located above the opening of the main mounting cavity; the drain hole is located on at least one first side plate of the case, and the first side plate is perpendicular to a plane where the opening of the main mounting cavity is located.

Preferably, the drainage structure comprises a first liquid guide plate positioned at a second side edge of the partition plate, and the second side edge of the partition plate is perpendicular to a plane where the opening of the main installation cavity is positioned; the main body part of the clapboard inclines downwards from the part far away from the first liquid guide plate to the first liquid guide plate;

the drain hole is located on at least one first side plate of the case, and the first side plate is perpendicular to a plane where the opening of the main mounting cavity is located.

Preferably, the drainage structure comprises a second liquid guide plate connected with a first side edge of the partition plate, the first side edge is located above the opening of the main installation cavity, and the main body part of the partition plate is inclined downwards from a part far away from the second liquid guide plate to the second liquid guide plate;

the liquid discharge hole is formed in a second side plate, used for covering the main mounting cavity, of the case, and the second liquid guide plate is inserted into the liquid discharge hole and discharges the received liquid to the outside of the case.

Preferably, the frequency converter comprises a capacitor mounting plate, the non-main power loop comprises a plurality of capacitors, and the plurality of capacitors are mounted to the secondary mounting cavity through the capacitor mounting plate; one side of electric capacity mounting panel is formed with the perpendicular to the baffle of the main part of electric capacity mounting panel, the baffle is kept away from one side of the main part of electric capacity mounting panel is formed with the drainage structure, and the electric capacity mounting panel assembles during the sub-installation cavity, the baffle level sets up.

Preferably, the frequency converter further comprises a fan assembly and an air-cooled radiator which are fixedly arranged in the auxiliary mounting cavity, and the partition plate formed with the flow guide structure is positioned below the air-cooled radiator; the case comprises an air inlet, an air outlet and an airflow channel formed between the air inlet and the air outlet, and the fan assembly and the air-cooled radiator are respectively positioned in the airflow channel.

The utility model discloses converter has following beneficial effect: the drainage structure is formed on the partition plate, and the partition plate corresponds to the upper part of the main mounting cavity, so that liquid can be guided to a set area or the outer part of the case by the drainage structure of the partition plate, the waterproof function of the main mounting cavity is achieved, the liquid is ensured not to easily enter the main mounting cavity, the stability and the reliability of a main power loop in the main mounting cavity are ensured, and the protection grade of the case is not required to be improved to isolate the liquid, so that the cost is reduced, the ventilation in the case can be ensured, and the heat dissipation effect of the frequency conversion assembly is improved; because the drainage structure is formed by the partition plate, a component for draining liquid does not need to be independently arranged, the structure is simplified, the difficulty in disassembly and assembly is not increased, the space utilization rate in the case can be improved, and the drainage structure has higher practicability.

Drawings

Fig. 1 is a schematic structural diagram of a frequency converter according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a support plate of a frequency converter according to a first embodiment of the present invention;

fig. 3 is a schematic structural diagram of a support plate of a frequency converter according to a second embodiment of the present invention;

fig. 4 is a schematic structural diagram of a support plate of a frequency converter according to a third embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1, the embodiment of the present invention provides a schematic structural diagram of a frequency converter, and the frequency converter can be applied to the field of power electronic devices. Referring to fig. 2, the frequency converter in this embodiment includes a chassis 1 and a frequency conversion assembly 2, and the frequency conversion assembly 2 includes a main power loop 3. Since the main power circuit 3 needs to be waterproof, it is necessary to ensure that the liquid in the cabinet 1 does not easily enter the installation area of the main power circuit 3, and to ensure the stability and reliability of the operation of the main power circuit 3.

Specifically, above-mentioned quick-witted case 1 is formed with the main installation cavity that encloses to close by baffle 4 and closes and form, and main power circuit 3 installation is fixed in main installation cavity, consequently can be by the isolated liquid of baffle 4 for liquid is difficult to enter into main installation cavity, reaches the waterproof function in main installation cavity.

Further, be formed with drainage structure 41 on the baffle 4 at the top of main installation cavity to take on the liquid that main installation cavity top dropped by drainage structure 41, and guide liquid to the settlement region in quick-witted case 1, or the outside of quick-witted case 1, avoid liquid to pile up on baffle 4 and the easy seepage is to the main installation cavity in, with the waterproof ability that improves main installation cavity. The set area is specifically an area that does not need to be waterproof in the chassis 1, such as an area where a non-main power circuit 3 (e.g., no-battery compartment or a weak-battery compartment) is installed or an empty area. In particular, the defined area preferably avoids the main mounting cavity, preventing a large amount of liquid from accumulating in the defined area and causing the liquid to flow to the main mounting cavity.

Above-mentioned converter is through forming drainage structure 41 at baffle 4, and make baffle 4 correspond the top of main installation cavity, thereby can be guided liquid by the drainage structure 41 of baffle 4 to the outside of setting for region or quick-witted case 1, reach the waterproof function to main installation cavity, ensure that liquid is difficult to get into main installation cavity, guarantee the stability and the reliability of main power circuit 3 in the main installation cavity, and need not to improve the protection level of quick-witted case 1 in order to completely cut off liquid, so not only the cost is reduced, can also guarantee the ventilation of machine case 1 inside, improve the radiating effect to frequency conversion subassembly 2.

Because the drainage structure 41 is formed by the partition plate 4, a component for draining liquid is not required to be independently arranged, the structure is simplified, the difficulty in disassembly and assembly is not increased, the space utilization rate in the case 1 can be improved, and the drainage structure has high practicability.

In an embodiment of the present invention, the frequency conversion module 2 includes the non-main power circuit 3, and the case 1 is formed with the sub-installation cavity adjacent to the main installation cavity and located above the main installation cavity, so that the liquid dropping from the upper side of the case 1 can be isolated by the non-main power circuit 3 in the sub-installation cavity, so as to store or guide the liquid of this part to the setting region, thereby reducing the guiding pressure of the drainage structure 41. Of course, the liquid dropped on the non-main power circuit 3 can also cool the non-main power circuit 3, which not only ensures the stability of the main power circuit 3, but also is beneficial to cooling the heat-generating device (such as a bus capacitor), and has high practicability.

Specifically, the non-main power circuit 3 is installed in the auxiliary installation cavity, and the drainage structure 41 is located on the partition plate 4 between the main installation cavity and the auxiliary installation cavity, so that the drainage structure 41 on the partition plate 4 can effectively guide the liquid above the main installation cavity to the set area or the outside of the case 1.

In addition, the frequency converter comprises a plurality of support plates 5, and the non-main power loop 3 is installed in the auxiliary installation cavity through the support plates 5. Further, be formed with baffle 4 that is located between main installation cavity and the sub-installation cavity on the mounting panel 5, and be equipped with in the quick-witted case 1 and communicate to the outage 11 of quick-witted case 1 outside, consequently drainage structure 41 accessible outage 11 leads liquid to the outside of quick-witted case 1 to prevent that liquid from piling up on baffle 4, guarantee the water-proof effects of main installation cavity. In addition, the frequency converter can enable the liquid discharged from the liquid discharge hole 11 to flow vertically along the partition plate 4 under the action of gravity by arranging the liquid discharge hole 11 in the vertical partition plate 4, so that the liquid accumulation is avoided.

In another embodiment of the present invention, the partition plate 4 at the top of the main installation cavity is integrally formed with the case 1, and a liquid discharge hole 11 communicating with the outside of the case 1 is formed in the case 1, and the drainage structure 41 guides the liquid to the outside of the case 1 through the liquid discharge hole 11.

The partition plate 4 can be machined and manufactured by a side plate of the case 1 through a sheet metal machining process (such as a cutting process and a bending process), so that the practicability of the case 1 can be improved, and parts for drainage do not need to be added, therefore, the structure is prevented from being complicated, and the utilization rate of the space adjacent to the side plate of the case 1 is greatly improved. The adjacent space of the side panels of the cabinet 1 is usually pre-set with installation gaps for effective utilization.

In an embodiment of the present invention, the drainage structure 41 includes a strip-shaped groove 411 disposed on the partition board 1, and the main portion of the partition board 4 is inclined downward from the portion far away from the strip-shaped groove 411 to the strip-shaped groove 411, so that the liquid dropped on the partition board 4 can be accumulated in the strip-shaped groove 411 under the action of gravity, and then collected by the strip-shaped groove 411 to guide the liquid to the setting area or the outside of the case 1.

Specifically, at least a portion of the bar-shaped slot 411 is communicated with the drain hole 11 of the cabinet 1, so that the liquid guiding slot 411 can guide the liquid to the outside of the cabinet through the drain hole 11.

In an embodiment of the present invention, the main installation cavity includes an opening vertically disposed, and the main power circuit is installed in the main installation cavity via the opening, and meanwhile, the main power circuit can be maintained through the opening of the main installation cavity. And, bar groove 411 is adjacent with the first side of baffle 4, and the first side of baffle 4 is located the open-ended top of main installation cavity to can collect bar groove 411 by the liquid that baffle 4 will drip the open-ended top of main installation cavity, rethread bar groove 411 shifts liquid, makes liquid be difficult to enter into main installation cavity through the opening of main installation cavity, thereby can further prevent that liquid from entering into main installation cavity more easily.

The liquid discharge hole 11 of the case 1 is located on at least one first side plate of the case 1, the first side plate is perpendicular to a plane where an opening of the main mounting cavity is located, namely the first side plate is located on one side of the opening of the main mounting cavity, and liquid is prevented from flowing vertically along the first side plate and being accumulated at the opening of the main mounting cavity.

In another embodiment of the present invention, as shown in fig. 3, the drainage structure 41 comprises a first liquid guiding plate 412 located at the second side of the partition plate 4, and the second side of the partition plate 4 is perpendicular to the plane of the opening of the main installation cavity, and preferably corresponds to the upper side of the opening of the main installation cavity. To prevent liquid from accumulating on the partition plate 4, the main portion of the partition plate 4 is inclined downward from the portion away from the first liquid guide plate 412 to the first liquid guide plate 412, so that the liquid can flow to the first liquid guide plate 412 under the action of gravity.

The drain hole 11 of the chassis 1 is located on at least one first side plate of the chassis 1, and the first side plate is perpendicular to a plane where the opening of the main installation cavity is located. Since the drainage structure 41 corresponds to the drainage hole 11, the first fluid guide plate 412 can drain the liquid to the outside of the cabinet 1 through the drainage hole 11.

In a further embodiment of the present invention, as shown in fig. 4, the drainage structure 41 comprises a second liquid guiding plate 413 connected to a first side of the partition plate 4, the first side is located above the opening of the main installation cavity, so that liquid is not easy to enter the opening of the main installation cavity. To prevent liquid from accumulating on the partition plate 4, the main portion of the partition plate 4 is inclined downward from the portion away from the second liquid guide plate 413 to the second liquid guide plate 413, so that the liquid can flow to the second liquid guide plate 413 by gravity. In particular, the two sides of the second liquid guiding plate 413 are respectively provided with a rib 414, so as to prevent the liquid from flowing out from the two sides of the second liquid guiding plate 413 and reducing the guiding effect of the liquid.

Specifically, the above-described frequency converter includes a capacitor mounting plate, the non-main power circuit 3 includes a plurality of capacitors 21, and the plurality of capacitors 21 are mounted to the sub-mounting cavity through the capacitor mounting plate. One side of the capacitor mounting plate is provided with a partition plate 4 perpendicular to the main body of the capacitor mounting plate, one side of the partition plate 4 away from the main body of the capacitor mounting plate is provided with a drainage structure 41, and when the capacitor mounting plate is assembled to the auxiliary mounting cavity, the partition plate 4 is horizontally arranged to ensure that the partition plate 4 can receive liquid, and then the liquid is guided to the set area or the outside of the case 1 by the drainage structure 41. Above-mentioned converter can reach waterproof function through forming baffle 4 at the electric capacity mounting panel to form drainage structure 41 at baffle 4, can not influence the electric capacity 21 of installing on the electric capacity mounting panel again, can improve the practicality of electric capacity mounting panel greatly.

In addition, the frequency converter further comprises a fan assembly and an air-cooled radiator which are fixedly arranged in the auxiliary mounting cavity, and the partition plate 4 with the flow guide structure is arranged below the air-cooled radiator, namely, liquid condensed and dripped on the air-cooled radiator can be accumulated on the partition plate 4, so that the liquid is guided to a set area or the outside of the case 1 by the flow guide structure 41. And, machine case 1 includes air intake, air outlet and forms the airflow channel between air intake and air outlet, and fan unit spare and air-cooled radiator are located the airflow channel respectively to can form the cooling air current that flows in by the air intake, air outlet exhaust under fan unit spare's drive, realize the air-cooled heat dissipation to frequency conversion subassembly 2, for frequency conversion subassembly 2 heat dissipation cooling.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A frequency converter, comprising a chassis and a frequency conversion assembly, wherein the frequency conversion assembly comprises a main power loop, wherein: a main mounting cavity formed by enclosing of a partition plate is formed in the case, and the main power loop is mounted in the main mounting cavity; and a drainage structure is formed on the partition plate at the top of the main mounting cavity, and is used for receiving liquid dropping from the upper part of the main mounting cavity and guiding the liquid to a set area in the case or the outside of the case.

2. The frequency converter of claim 1, wherein the frequency conversion assembly includes a non-primary power loop, a secondary mounting cavity is formed in the chassis adjacent to and above the primary mounting cavity, the non-primary power loop is mounted in the secondary mounting cavity, and the flow directing structure is located on a partition between the primary and secondary mounting cavities.

3. The frequency converter of claim 2, wherein the frequency converter includes a mounting plate through which the non-primary power loop is mounted within the secondary mounting cavity; the bracket plate is provided with a partition plate positioned between the main mounting cavity and the auxiliary mounting cavity, the case is provided with a liquid discharge hole communicated with the outside of the case, and the drainage structure guides liquid to the outside of the case through the liquid discharge hole.

4. The frequency converter according to claim 1, wherein the partition plate at the top of the main mounting cavity is integrally formed with the cabinet, and the cabinet is provided with a drain hole communicated to the outside of the cabinet, and the drainage structure guides the liquid to the outside of the cabinet through the drain hole.

5. The frequency converter according to claim 3 or 4, wherein the drainage structure comprises a strip-shaped groove formed in the partition plate, a main body of the partition plate is inclined downwards from a part far away from the strip-shaped groove to the strip-shaped groove, and at least one part of the strip-shaped groove is communicated with the liquid drainage hole.

6. The frequency converter according to claim 5, wherein the strip-shaped groove is adjacent to a first side edge of the partition plate, and the first side edge is positioned above the opening of the main mounting cavity; the drain hole is located on at least one first side plate of the case, and the first side plate is perpendicular to a plane where the opening of the main mounting cavity is located.

7. The frequency converter according to claim 3 or 4, wherein the flow guiding structure comprises a first liquid guiding plate located at a second side edge of the partition plate, and the second side edge of the partition plate is perpendicular to a plane where the opening of the main installation cavity is located; the main body part of the clapboard inclines downwards from the part far away from the first liquid guide plate to the first liquid guide plate;

8. The frequency converter according to claim 3 or 4, wherein the flow-guiding structure comprises a second liquid-guiding plate connected to a first side of the partition plate, the first side is located above the opening of the main mounting cavity, and a main portion of the partition plate is inclined downward from a portion away from the second liquid-guiding plate to the second liquid-guiding plate;

9. The frequency converter of claim 2, wherein the frequency converter includes a capacitive mounting plate, the non-primary power loop includes a plurality of capacitors, and the plurality of capacitors are mounted to the secondary mounting cavity by the capacitive mounting plate; one side of electric capacity mounting panel is formed with the perpendicular to the baffle of the main part of electric capacity mounting panel, the baffle is kept away from one side of the main part of electric capacity mounting panel is formed with the drainage structure, and the electric capacity mounting panel assembles during the sub-installation cavity, the baffle level sets up.

10. The frequency converter according to claim 2, further comprising a fan assembly and an air-cooled radiator which are fixedly installed in the auxiliary installation cavity, and the partition plate formed with the flow guide structure is located below the air-cooled radiator; the case comprises an air inlet, an air outlet and an airflow channel formed between the air inlet and the air outlet, and the fan assembly and the air-cooled radiator are respectively positioned in the airflow channel.