CN223584031U - A heat dissipation structure for a frequency converter, a frequency converter, and an air compressor. - Google Patents

Abstract

This utility model provides a heat dissipation structure for a frequency converter, a frequency converter, and an air compressor. The heat dissipation structure includes a first heat sink and a second heat sink. The first heat sink dissipates heat from the rectifier module of the frequency converter; the second heat sink dissipates heat from the inverter module of the frequency converter. The first heat sink has a first heat dissipation duct, and the second heat sink has a second heat dissipation duct. The heat dissipation structure also includes a connecting duct that connects the first and second heat dissipation ducts. The connecting duct accommodates at least a portion of the capacitor module of the frequency converter for heat dissipation. According to the technical solution of this utility model, the first heat dissipation duct, the connecting duct, and the second heat dissipation duct work together to form a duct. When the cooling fan inside the frequency converter blows air into the duct, the air can flow through the connecting duct to dissipate heat from the capacitor module within the connecting duct, thereby improving the heat dissipation effect of the capacitor module.

Description

Frequency converter heat radiation structure, frequency converter and air compressor machine

Technical Field

The utility model belongs to the technical field of frequency converters, and particularly relates to a frequency converter radiating structure, a frequency converter and an air compressor.

Background

The frequency converter is an electric control device for controlling the alternating current motor by changing the working frequency of the motor by applying a frequency conversion technology and a microelectronic technology. The frequency converter mainly comprises a rectifying module, a capacitor module, an inversion module, a braking unit, a driving unit, a detection unit, a micro-processing unit and the like, wherein the rectifying module is used for converting input three-phase electricity into direct current, the capacitor module is used for filtering the direct current output by the rectifying module, and the inversion module is used for converting the direct current filtered by the capacitor module into alternating current. The converter is generally internally provided with a heat radiation structure for radiating heat of the rectifying module and the inverting module, but the heat radiation effect of the capacitor module is poor, and the capacitor module needs to be optimized.

Disclosure of utility model

Therefore, the utility model provides a frequency converter radiating structure, a frequency converter and an air compressor, and mainly aims to solve the technical problem of improving the radiating effect of a capacitor module in the frequency converter.

In order to solve the above-mentioned problems, the present utility model provides a heat dissipation structure of a frequency converter, comprising:

the first radiator is used for radiating the rectifier module of the frequency converter;

the second radiator is used for radiating the inversion module of the frequency converter;

The first radiator is provided with a first radiating air channel, the second radiator is provided with a second radiating air channel, the frequency converter radiating structure further comprises a communicating air channel which is communicated with the first radiating air channel and the second radiating air channel, and the communicating air channel is used for accommodating at least one part of a capacitor module of the frequency converter so as to radiate heat of the capacitor module.

In some embodiments, the first heat dissipation air channel is provided with a first air opening, the second heat dissipation air channel is provided with a second air opening, the first air opening is opposite to the second air opening, a space is arranged between the first air opening and the second air opening, and the frequency converter heat dissipation structure forms the communication air channel at the space.

In some embodiments, the first radiator includes first radiating fins, the number of the first radiating fins is more than two, and the first radiating fins are sequentially arranged at intervals in parallel, a first radiating runner is formed between each two adjacent first radiating fins, each first radiating runner is matched with and forms the first radiating air duct, and openings of each first radiating runner on the same side are matched with and form the first air port.

In some embodiments, the first heat sink further comprises a first substrate, the first substrate is provided with a first a side and a second a side which are opposite, each first heat dissipation fin is arranged on the first substrate and located on the first a side, and the first heat sink is connected with the rectifying module through the second a side so as to dissipate heat of the rectifying module.

In some embodiments, the second radiator includes second radiating fins, the number of the second radiating fins is more than two, and the second radiating fins are sequentially arranged at intervals in parallel, a second radiating runner is formed between each two adjacent second radiating fins, each second radiating runner is matched to form the second radiating air duct, and openings of each second radiating runner on the same side are matched to form the second air port.

In some embodiments, the second radiator further comprises a second substrate, the second substrate is provided with a first b side and a second b side which are opposite, each second radiating fin is arranged on the second substrate and is located on the first b side, and the second radiator is connected with the inversion module through the second b side so as to radiate heat of the inversion module.

In some embodiments, the heat dissipation structure of the frequency converter further comprises a first connecting plate and a second connecting plate, wherein the first connecting plate and the second connecting plate are located on two opposite sides of the interval to form side walls on two opposite sides of the communication air duct.

In some embodiments, the first connecting plate is provided with a bayonet for inserting the capacitor of the capacitor module into the communication air duct, the bayonet is also used for being clamped with the capacitor, and the second connecting plate is used for providing support for the capacitor inserted into the communication air duct.

In some embodiments, when the first heat sink includes first heat dissipation fins, the number of the first heat dissipation fins is more than two, and the first heat dissipation fins are sequentially arranged at intervals in parallel, and the second heat sink includes second heat dissipation fins, the number of the second heat dissipation fins is more than two, and the second heat dissipation fins are sequentially arranged at intervals in parallel,

Each first radiating fin is sequentially arranged along a first direction of the radiating structure of the frequency converter, each second radiating fin is sequentially arranged along the first direction, the first connecting plate, the first radiator, the second connecting plate and the second radiator are matched to enclose the communication air duct, and the two ends of the communication air duct in the first direction are provided with openings.

The utility model also provides a frequency converter, which comprises the frequency converter heat radiation structure.

In some embodiments, the rectifying module is disposed on the first heat sink, the inverting module is disposed on the second heat sink, and the capacitive module is located between the rectifying module and the inverting module;

The frequency converter further comprises a circuit connecting piece, the circuit connecting piece spans the capacitor module, one end of the circuit connecting piece is electrically connected with the rectifying module, the other end of the circuit connecting piece is electrically connected with the inversion module, the middle of the circuit connecting piece is electrically connected with the capacitor module, and the circuit connecting piece is used for electrically connecting the rectifying module, the capacitor module and the inversion module, so that output signals of the rectifying module are filtered by the capacitor module and then input to the inversion module.

In some embodiments, the circuit connection is a busbar having a positive busbar and a negative busbar, the busbar being electrically connected to the positive stud of the capacitive module by the positive busbar and to the negative stud of the capacitive module by the negative busbar;

The positive busbar is electrically connected with a positive post of the capacitor module through the protruding portion, and a first avoidance hole for the protruding portion to pass through is formed in the negative busbar.

In some embodiments, the negative electrode busbar is provided with a bolt via hole, and a first bolt is used for fixing the negative electrode busbar to a negative electrode convex column of the capacitor module through the bolt via hole;

And/or the protruding part is fixed with the positive pole protruding column of the capacitor module through a second bolt.

In some embodiments, the other end of the circuit connector is provided with a pin, the other end of the circuit connector is electrically connected with the inversion module through the pin, and the pin is attached to the inversion module.

In some embodiments, the frequency converter further includes a wire inlet assembly, the wire inlet assembly spans the capacitor module, one end of the wire inlet assembly is located at a side of the capacitor module, which is away from the rectifier module, the other end of the wire inlet assembly is located at a side of the capacitor module, which is close to the rectifier module, and the other end of the wire inlet assembly is electrically connected with the rectifier module, the wire inlet assembly introduces three-phase electricity through one end thereof, and introduces the three-phase electricity to the rectifier module through the other end thereof;

the wire inlet assembly is located on one side, away from the capacitor module, of the circuit connecting piece.

The utility model also provides an air compressor, which comprises the frequency converter.

The frequency converter radiating structure, the frequency converter and the air compressor provided by the utility model have the following beneficial effects:

1. The first radiating air channel, the communication air channel and the second radiating air channel are matched to form an air channel, when the air channel is blown by the radiating fan in the frequency converter, wind can flow through the communication air channel to radiate the capacitor module in the communication air channel, and therefore the radiating effect of the capacitor module can be improved.

2. The power of the first radiator can be matched with the power of the rectifying module, and the power of the second radiator is matched with the power of the inverting module. The rectifier module and the inverter module of the frequency converter respectively adopt a radiator to radiate heat independently, so that the radiating efficiency can be improved, the respective temperatures of the rectifier module and the inverter module can be monitored in real time conveniently, and the heat influence of different modules is prevented.

3. The inversion module and the rectification module are respectively arranged on two sides of the capacitance module, such as front and rear sides, the circuit connecting piece is electrically connected with the inversion module and the rectification module across the capacitance module, and the circuit connecting piece is similar to a bridge-type obstacle avoidance circuit, so that electromagnetic interference between the rectification module and the inversion module is reduced, stability of a system is improved, layout design of a circuit is optimized, and disassembly and assembly are more convenient.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. The drawings in the following description are merely exemplary and other implementations drawings may be derived from the drawings provided without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram illustrating an assembly of a heat dissipation structure and a capacitor module of a frequency converter according to the present utility model;

Fig. 2 is a schematic diagram of a part of a frequency converter according to an embodiment of the utility model;

FIG. 3 is a schematic diagram of another view of the frequency converter of FIG. 2;

FIG. 4 is a schematic diagram of the connection of the rectifier module, the capacitor module, and the inverter module;

FIG. 5 is a top view of the structure of FIG. 4;

Fig. 6 is a schematic structural view of a positive electrode busbar;

Fig. 7 is a schematic view of the structure of the negative electrode busbar.

The reference numerals are:

1. A first heat sink; 2, a second radiator, 3, a rectifying module, 4, an inverter module, 5, a circuit connecting piece, 6, a wire inlet assembly, 7, a capacitor module, 8, a first connecting plate, 9, a second connecting plate, 10, a communication air duct, 11, a first substrate, 12, a first radiating fin, 11a, a first a side, 11b, a second a side, 13, a rectifying positive electrode metal sheet, 14, a rectifying negative electrode metal sheet, 15, a contactor, 17, a positive electrode busbar, 18, a negative electrode busbar, 19, a wire outlet assembly, 20a, a first bolt, 20b, a second bolt, 21, a second substrate, 22, a second radiating fin, 21a, a first b side, 21b, a second b side, 31, a capacitor, 61, a metal sheet, 81, a bayonet, 100, a first radiating air duct, 101, a first air port, 171, a protruding part, 172, a second clearance hole, 181, a pin, 182, a bolt through hole, 183, a first clearance hole, 200, a second radiating air duct, 201, a second air duct, and a first direction.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of the present utility model, and the azimuth terms "inside and outside" refer to inside and outside with respect to the outline of each component itself.

Spatially relative terms, such as "above," "upper" and "upper surface," "above" and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the process is carried out, the exemplary term "above" may be included. Upper and lower. Two orientations below. The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

Referring to fig. 1 to 3 in combination, according to an embodiment of the present utility model, there is provided a heat dissipation structure of a frequency converter, which includes a first heat sink 1 and a second heat sink 2. The first radiator 1 is used for radiating heat of a rectifying module 3 of the frequency converter. The second radiator 2 is used for radiating heat of the inverter module 4 of the frequency converter. The first radiator 1 has a first heat dissipation air channel 100, and the second radiator 2 has a second heat dissipation air channel 200. The inverter heat dissipation structure further includes a communication air duct 10 communicating the first heat dissipation air duct 100 and the second heat dissipation air duct 200. The communication air duct 10 is used for accommodating at least a part of the capacitor module 7 of the frequency converter so as to radiate heat of the capacitor module 7.

In the above example, the first heat dissipation air duct 100, the communication air duct 10 and the second heat dissipation air duct 200 cooperate to form an air duct, when the heat dissipation fan in the frequency converter blows air to the air duct, the air can flow through the communication air duct 10 to dissipate heat of the capacitor module 7 in the communication air duct 10, so that the heat dissipation effect of the capacitor module 7 can be improved.

The power of the first radiator 1 may be adapted to the power of the rectifying module 3, and the power of the second radiator 2 may be adapted to the power of the inverter module 4. The rectifier module 3 and the inverter module 4 of the frequency converter respectively adopt a radiator to radiate heat independently, so that the radiating efficiency can be improved, the respective temperatures of the rectifier module 3 and the inverter module 4 can be monitored in real time conveniently, and the heat influence of different modules is prevented.

The positions of the first heat dissipation air duct 100, the communication air duct 10, and the second heat dissipation air duct 200 may be set according to actual situations. In a specific application example, as shown in fig. 1 and 2, the first heat dissipation air duct 100, the communication air duct 10 and the second heat dissipation air duct 200 cooperate to form a stepped heat dissipation air duct. Specifically, a first step may be formed between the first heat dissipation air duct 100 and the communication air duct 10, and a second step may be formed between the communication air duct 10 and the second heat dissipation air duct 200.

In order to form the aforementioned communication duct 10, in some embodiments, as shown in fig. 2, the aforementioned first heat dissipation duct 100 has a first air port 101, and the second heat dissipation duct 200 has a second air port 201. The first tuyere 101 is opposite to the second tuyere 201 with a space between the first tuyere 101 and the second tuyere 201. Wherein, the aforementioned heat dissipation structure of the frequency converter forms the aforementioned communication air duct 10 at the interval.

In the above example, wind may flow into the communication duct 10 from the first tuyere 101 and then flow out from the second tuyere 201, or wind may flow into the communication duct 10 from the second tuyere 201 and then flow out from the first tuyere 101. Specifically, the position of the cooling fan can be designed according to the actual situation when the air flows into the communication air duct 10 from the first air port 101 or flows into the communication air duct 10 from the second air port 201.

In some embodiments, as shown in fig. 1 to 3, the aforementioned first heat sink 1 may include first heat dissipation fins 12, where the first heat dissipation fins 12 may be plate-shaped, and the number of the first heat dissipation fins 12 is more than two and sequentially arranged in parallel at intervals. First heat dissipation flow passages are formed between every two adjacent first heat dissipation fins 12. The first heat dissipation channels are matched to form the first heat dissipation air duct 100, and the openings of the first heat dissipation channels on the same side are matched to form the first air port 101.

In the above example, the heat dissipation of the first heat dissipation air duct 100 is facilitated by the provision of the first heat dissipation fins 12.

In some embodiments, as shown in fig. 1, the foregoing first heat spreader 1 may further include a first substrate 11, where the first substrate 11 has a first a side 11a and a second a side 11b opposite to each other, and each of the foregoing first heat dissipating fins 12 is disposed on the first substrate 11 and located on the first a side 11a. For example, each first heat dissipation fin 12 may be integrally formed on the first a side 11a of the first substrate 11, so that the connection stability between each first heat dissipation fin 12 and the first substrate 11 may be improved. The first heat sink 1 is connected to the rectifying module 3 through the second a-side 11b to dissipate heat of the rectifying module 3.

In the above example, since each of the first heat dissipation fins 12 is disposed on the same side (i.e., the first a-side 11 a) of the first substrate 11, it is advantageous to mount the rectifier module 3 on the other side (i.e., the second a-side 11 b) of the first substrate 11, so that the first heat dissipation fins 12 do not interfere with the mounting of the rectifier module 3.

In some embodiments, as shown in fig. 1, the aforementioned second heat sink 2 may include second heat dissipation fins 22, where the number of the second heat dissipation fins 22 is more than two, and the second heat dissipation fins are sequentially arranged in parallel at intervals. A second heat dissipation flow channel is formed between every two adjacent second heat dissipation fins 22. The second heat dissipation channels are matched to form the second heat dissipation air duct 200, and the openings of the second heat dissipation channels on the same side are matched to form the second air port 201.

In the above example, the heat dissipation of the second heat dissipation air duct 200 is facilitated by the provision of the second heat dissipation fins 22.

In some embodiments, as shown in fig. 1, the aforementioned second heat spreader 2 may further include a second substrate 21, the second substrate 21 having first and second opposite b sides 21a and 21b. Each of the second heat radiating fins 22 is provided on the second substrate 21, and is located on the first b side 21a. For example, each second heat dissipation fin 22 may be integrally formed on the first b side 21a of the second substrate 21, so that the connection stability between each second heat dissipation fin 22 and the second substrate 21 may be improved. The second radiator 2 is connected to the inverter module 4 through a second b-side 21b to radiate heat from the inverter module 4.

In the above example, since the second heat dissipation fins 22 are disposed on the same side (i.e., the first b-side 21 a) of the second substrate 21, it is advantageous to mount the inverter module 4 on the other side (i.e., the second b-side 21 b) of the second substrate 21, so that the second heat dissipation fins 22 do not interfere with the mounting of the inverter module 4.

In some embodiments, the second a-side 11b and the second b-side 21b are both located on the same side of the inverter heat dissipation structure.

In the above example, since the second a side 11b and the second b side 21b are both located on the same side of the heat dissipation structure of the frequency converter, when the rectifying module 3 is mounted on the second a side 11b and the inverting module 4 is mounted on the second b side 21b, both the rectifying module 3 and the inverting module 4 can be located on the same side of the heat dissipation structure of the frequency converter, which is advantageous for electrically connecting the rectifying module 3 and the inverting module 4.

In some embodiments, as shown in fig. 1-3, the foregoing inverter heat dissipation structure may further include a first connection plate 8 and a second connection plate 9. Both the first connection plate 8 and the second connection plate 9 are located at opposite sides of the aforementioned space to constitute side walls of opposite sides of the aforementioned communication duct 10.

In the above example, by providing the first connecting plate 8 and the second connecting plate 9 to form the side walls on the opposite sides of the communication air duct 10, air leakage of the communication air duct 10 from the side on which the first connecting plate 8 is located and the side on which the second connecting plate 9 is located can be avoided, and thus the heat dissipation efficiency of the air in the communication air duct 10 to the capacitor module 7 can be improved.

As shown in fig. 2, the first connecting plate 8 and the second connecting plate 9 may be sheet metal parts. Both ends of the first connection plate 8 may be connected to the first heat sink 1 and the second heat sink 2, respectively, so that both the first heat sink 1 and the second heat sink 2 may be formed as one body through the first connection plate 8 and the second connection plate 9. The second connection plate 9 may be connected to the first radiator 1.

In some embodiments, as shown in fig. 1, the first connecting plate 8 is provided with a bayonet 81 for inserting the capacitor 31 of the capacitor module 7 into the communication duct 10. The bayonet 81 is also used to snap-fit with the capacitor 31. The aforementioned second connection plate 9 is used to provide support for the capacitor 31 inserted into the communication duct 10.

In the above example, the capacitor 31 is inserted into the communication duct 10 through the bayonet 81, the upper portion of the capacitor 31 is clamped by the bayonet 81, the lower portion of the capacitor 31 is supported by the second connecting plate 9, and the bayonet 81 and the second connecting plate 9 cooperate to keep the capacitor 31 stable.

In some embodiments, as shown in fig. 1 to 3, when the first radiator 1 includes the first radiating fins 12, the number of the first radiating fins 12 is more than two, and the first radiating fins are sequentially arranged at intervals in parallel, and the second radiator 2 includes the second radiating fins 22, the number of the second radiating fins 22 is more than two, and the second radiating fins 22 are sequentially arranged at intervals in parallel, the first radiating fins 12 may be sequentially arranged along the first direction a of the radiator structure of the present utility model, and the second radiating fins 22 may also be sequentially arranged along the first direction a of the radiator structure of the present utility model. The first connecting plate 8, the first radiator 1, the second connecting plate 9 and the second radiator 2 cooperate to enclose the communication duct 10, and two ends of the communication duct 10 in the first direction a are provided with openings.

The first direction a may be a length direction, a width direction, or a height direction of the heat dissipation structure of the frequency converter of the present utility model. The width direction of the heat dissipation structure of the frequency converter of the present utility model is illustrated by the first direction a. When the first direction a is the width direction of the heat dissipation structure of the frequency converter, the first heat dissipation fins 12 and the second heat dissipation fins 22 are sequentially arranged along the width direction of the heat dissipation structure of the frequency converter, so that the first heat dissipation air channel 100 formed by the clearance fit of the first heat dissipation fins 12 is a channel for running wind along the length direction of the heat dissipation structure of the frequency converter, and the second heat dissipation air channel 200 formed by the clearance fit of the second heat dissipation fins 22 is a channel for running wind along the length direction of the heat dissipation structure of the frequency converter, so that when the heat dissipation structure of the frequency converter is installed in the housing of the frequency converter, the side walls on two sides of the width direction of the housing of the frequency converter are used for sealing openings of the communication air channel 10 on two ends of the width direction of the housing of the frequency converter, thereby further reducing the air leakage of the communication air channel 10 and improving the heat dissipation of the air in the communication air channel 10 to the capacitor module 7, and the space in the length direction of the housing of the frequency converter can also be used for providing a wind space for running wind for the first heat dissipation air channel 100 and the second heat dissipation air channel 200.

The utility model also provides a frequency converter, which can comprise the frequency converter heat radiation structure. Wherein, because the converter adopts above-mentioned converter heat radiation structure's owing, first heat dissipation wind channel 100, intercommunication wind channel 10 and second heat dissipation wind channel 200 three cooperation form the wind channel, and when the radiator fan in the converter blows the wind to the wind channel, wind can flow through intercommunication wind channel 10, dispels the heat to the electric capacity module 7 in the intercommunication wind channel 10 to can improve the radiating effect of electric capacity module 7.

In some embodiments, the aforementioned rectifying module 3 is disposed on the first heat sink 1, the inverter module 4 is disposed on the second heat sink 2, and the capacitor module 7 is located between the rectifying module 3 and the inverter module 4.

The rectification module 3 is used for converting input three-phase electricity into direct current and outputting the direct current. The capacitor module 7 is used for filtering the direct current output by the rectifying module 3. The inverter module 4 is used for converting the direct current filtered by the capacitor module 7 into alternating current and outputting the alternating current.

It should be noted that the structures of the rectifying module 3, the capacitor module 7 and the inverter module 4 are all in the prior art, and are not described herein.

In some embodiments, as shown in fig. 2-4, the foregoing frequency converter further includes a circuit connection 5, where the circuit connection 5 may be a busbar or the like. The circuit connecting piece 5 spans the capacitor module 7, one end of the circuit connecting piece 5 is electrically connected with the rectifying module 3, the other end of the circuit connecting piece 5 is electrically connected with the inversion module 4, and the middle part of the circuit connecting piece 5 is electrically connected with the capacitor module 7. The circuit connecting piece 5 is used for electrically connecting the rectifying module 3, the capacitor module 7 and the inversion module 4, so that an output signal of the rectifying module 3 is filtered by the capacitor module 7 and then is input to the inversion module 4.

In the above example, the inverter module 4 and the rectifier module 3 are disposed on both sides of the capacitor module 7, respectively, and the circuit connection member 5 is electrically connected with the inverter module 4 and the rectifier module 3 across the capacitor module 7, like a "bridge" obstacle avoidance, so that such a connection loop of the circuit connection member 5 may be sometimes referred to as a "bridge connection loop". Through this bridge type connecting circuit, reduced the electromagnetic interference between rectifier module 3 and the contravariant module 4 each other, improved the stability of system, optimized the layout design of circuit, it is more convenient to make the dismouting.

In a specific application example, the capacitor module 7 is higher than the rectifier module 3 and the inverter module 4 at both sides, so that the three form a convex structure with a high middle and a low two sides.

In some embodiments, as shown in fig. 3, 6 and 7, the aforementioned circuit connector 5 is a busbar. The busbar has a positive busbar 17 and a negative busbar 18. The busbar is electrically connected with the positive pole stud of the capacitor module 7 through the positive busbar 17 and with the negative pole stud of the capacitor module 7 through the negative busbar 18. Wherein the negative busbar 18 is close to the capacitor module 7 relative to the positive busbar 17. The positive busbar 17 is provided with a protruding portion 171, the positive busbar 17 is electrically connected with a positive post of the capacitor module 7 through the protruding portion 171, and the negative busbar 18 is provided with a first avoidance hole 183 through which the protruding portion 171 passes.

In the above example, by disposing both the positive electrode bus bar 17 and the negative electrode bus bar 18 in layers, it is possible to prevent the occurrence of a short circuit by contact of both the positive electrode bus bar 17 and the negative electrode bus bar 18.

In some embodiments, the foregoing negative busbar 18 may be provided with a bolt via 182, and the first bolt 20a is used to fix the negative busbar 18 to the negative stud of the capacitor module 7 through the bolt via 182. The positive busbar 17 is further provided with a second avoidance hole 172 for avoiding the first bolt 20a, so as to avoid short circuit caused by contact between the positive busbar 17 and the first bolt 20 a.

In some embodiments, the aforementioned protruding portion 171 may be fixed to the positive electrode tab of the capacitor module 7 by the second bolt 20b to improve the electrical connection stability of the protruding portion 171 and the positive electrode tab.

It should be noted that the protruding portion 171 may be formed by a male die.

In some embodiments, the other end of the circuit connector 5 may have a pin 181, and the other end of the circuit connector 5 is electrically connected to the inverter module 4 through the pin 181. Wherein, pin 181 is laminated with contravariant module 4, prevents to appear the problem on the cooperation.

In some embodiments, as shown in fig. 2-3, the foregoing frequency converter may further include a wire inlet assembly 6, and further includes a wire inlet assembly 6, where the wire inlet assembly 6 spans the capacitor module 7, one end of the wire inlet assembly 6 is located on a side of the capacitor module 7 facing away from the rectifier module 3, the other end of the wire inlet assembly 6 is located on a side of the capacitor module 7 near the rectifier module 3, and the other end of the wire inlet assembly 6 is electrically connected with the rectifier module 3. The incoming line assembly 6 introduces three-phase electricity through one end thereof and introduces three-phase electricity to the rectification module 3 through the other end thereof.

In the above example, the incoming line assembly 6 spans the capacitor module 7, so that the space utilization rate inside the frequency converter can be greatly improved, the circuit layout is more convenient, and the disassembly and assembly are more convenient.

In some embodiments, as shown in fig. 4, the aforementioned wire inlet assembly 6 may include three metal sheets 61, and the three metal sheets 61 may each be a copper sheet. The incoming line assembly 6 spans the capacitor module 7 through the three metal sheets 61, and one end of the three metal sheets 61 forms one end of the incoming line assembly 6, so as to introduce three-phase electricity. The other ends of the three metal sheets 61 constitute the other ends of the aforementioned incoming line assembly 6 to direct three-phase electricity to the rectification module 3.

In some embodiments, the aforementioned incoming line assembly 6 is located on the side of the circuit connection 5 facing away from the capacitive module 7, so as to facilitate the introduction of three-phase electricity by the incoming line assembly 6.

In one specific example of application, as shown in fig. 3-5, each of the three metal sheets 61 may be in the shape of a "table". Wherein three metal sheets 61 in the shape of a Chinese character 'ji' form the incoming line assembly 6, the incoming line assembly 6 crosses the capacitor module 7 and is positioned at the side of the circuit connection 5, such as a busbar, facing away from the capacitor module 7. The busbar has opposite first and second ends. The busbar is connected with the rectifying module 3 through a first end and is connected with the inverting module 4 through a second end. The incoming line assembly 6 is connected to the rear rectifier module 3, the incoming line assembly 6 is connected to the input end of the rectifier module 3 through bolts, for example, the incoming line assembly 6 can be fixed to a diode connection end of the input end of the rectifier module 3 through bolts. The negative electrode of the output end of the rectifying module 3 is connected with the negative electrode of the first end of the busbar through a rectifying negative electrode metal sheet 14 such as a copper sheet, and the positive electrode of the output end of the rectifying module 3 is connected with the contactor 15 through a rectifying positive electrode metal sheet 13 such as a copper sheet and then connected to the positive electrode of the first end of the busbar, so that a complete rectifying circuit is formed. The positive pole and the negative pole of female row second end are all connected with inverter module 4 through the pin, and the pin all can laminate completely with inverter module 4's input. The output end of the inversion module 4 is connected with an outgoing line assembly 19 to form a complete inversion loop. The middle part of the positive electrode busbar 17 is provided with a first bulge connected with the positive electrode of the capacitor module 7, the middle part of the negative electrode busbar 18 is provided with a second bulge connected with the negative electrode of the capacitor module 7, and the first bulge and the second bulge are connected with the capacitor module 7 through bolts 20, so that the capacitor module 7 realizes the filtering function of outputting direct current to the rectifier module 3. The first protrusions and the second protrusions are arranged at intervals to avoid each other. The first protrusion and the second protrusion may be machined by means of a male die. The inverter module 4 and the rectifying module 3 are respectively arranged at the front and rear sides of the capacitor module 7, so that the connecting loop is similar to a bridge-type obstacle avoidance loop, and is called a bridge-type connecting loop. Through this connecting loop, each spare part is in the same place with the complete connection of corresponding module and full play corresponds the function, has improved space utilization by a wide margin simultaneously, makes things convenient for circuit layout more, makes the dismouting more convenient.

The utility model also provides an air compressor which can comprise the frequency converter of any one of the above. Wherein, because the air compressor machine adopts the aforesaid converter, first heat dissipation wind channel 100, intercommunication wind channel 10 and second heat dissipation wind channel 200 three cooperation form the wind channel, and when the radiator fan in the converter blows the wind to the wind channel, the wind can flow through intercommunication wind channel 10, dispels the heat to the electric capacity module 7 in the intercommunication wind channel 10 to can improve the radiating effect of electric capacity module 7.

Those skilled in the art will readily appreciate that the advantageous features of the various aspects described above may be freely combined and stacked without conflict.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model. The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.

Claims (16)

1. The frequency converter heat radiation structure is characterized by comprising:

The first radiator (1) is used for radiating the rectification module (3) of the frequency converter;

the second radiator (2) is used for radiating heat of the inverter module (4) of the frequency converter;

The first radiator (1) is provided with a first radiating air channel (100), the second radiator (2) is provided with a second radiating air channel (200), the frequency converter radiating structure further comprises a communicating air channel (10) which is communicated with the first radiating air channel (100) and the second radiating air channel (200), and the communicating air channel (10) is used for accommodating at least one part of a capacitor module (7) of the frequency converter so as to radiate heat of the capacitor module (7).

2. The frequency converter heat dissipation structure of claim 1, wherein:

The first heat dissipation air duct (100) is provided with a first air opening (101), the second heat dissipation air duct (200) is provided with a second air opening (201), the first air opening (101) is opposite to the second air opening (201), a space is arranged between the first air opening and the second air opening, and the frequency converter heat dissipation structure forms the communication air duct (10) at the space.

3. The inverter heat dissipation structure as defined in claim 2 wherein:

The first radiator (1) comprises more than two first radiating fins (12), the first radiating fins (12) are sequentially arranged at intervals in parallel, first radiating runners are formed between every two adjacent first radiating fins (12), each first radiating runner is matched with the first radiating air duct (100), and openings of the first radiating runners on the same side are matched with each other to form the first air opening (101).

4. A transducer heat sink structure according to claim 3, wherein:

The first radiator (1) further comprises a first substrate (11), the first substrate (11) is provided with a first a side (11 a) and a second a side (11 b) which are opposite to each other, each first radiating fin (12) is arranged on the first substrate (11) and is located on the first a side (11 a), and the first radiator (1) is connected with the rectifying module (3) through the second a side (11 b) so as to radiate heat of the rectifying module (3).

5. The inverter heat dissipation structure as defined in any one of claims 2-4 wherein:

The second radiator (2) comprises more than two second radiating fins (22), the second radiating fins (22) are sequentially arranged at intervals in parallel, second radiating runners are formed between every two adjacent second radiating fins (22), each second radiating runner is matched with the second radiating air duct (200), and openings of the second radiating runners on the same side are matched with each other to form the second air opening (201).

6. The frequency converter heat dissipation structure of claim 5, wherein:

The second radiator (2) further comprises a second substrate (21), the second substrate (21) is provided with a first b side (21 a) and a second b side (21 b) which are opposite, each second radiating fin (22) is arranged on the second substrate (21) and is located on the first b side (21 a), and the second radiator (2) is connected with the inversion module (4) through the second b side (21 b) so as to radiate heat of the inversion module (4).

7. The heat dissipation structure of a frequency converter according to any one of claims 2-4 and 6, further comprising a first connection plate (8) and a second connection plate (9), wherein the first connection plate (8) and the second connection plate (9) are located on opposite sides of the space to form side walls on opposite sides of the communication duct (10).

8. The frequency converter heat dissipation structure of claim 7, wherein:

The first connecting plate (8) is provided with a bayonet (81) for inserting the capacitor (31) of the capacitor module (7) into the communication air duct (10), the bayonet (81) is also used for being clamped with the capacitor (31), and the second connecting plate (9) is used for supporting the capacitor (31) inserted into the communication air duct (10).

9. The heat dissipation structure of a frequency converter as recited in claim 7, wherein when the first heat sink (1) includes first heat dissipation fins (12), the number of the first heat dissipation fins (12) is two or more, and is sequentially arranged in parallel at intervals, and the second heat sink (2) includes second heat dissipation fins (22), the number of the second heat dissipation fins (22) is two or more, and is sequentially arranged in parallel at intervals,

Each first radiating fin (12) is sequentially arranged along a first direction (a) of the radiating structure of the frequency converter, each second radiating fin (22) is sequentially arranged along the first direction (a), the first connecting plate (8), the first radiator (1), the second connecting plate (9) and the second radiator (2) are matched to enclose the communication air duct (10), and openings are formed at two ends of the communication air duct (10) in the first direction (a).

10. A frequency converter, characterized by comprising the frequency converter heat dissipation structure as claimed in any one of claims 1-9.

11. The frequency converter according to claim 10, characterized in that the rectifying module (3) is arranged on the first radiator (1), the inverting module (4) is arranged on the second radiator (2), and the capacitive module (7) is located between the rectifying module (3) and the inverting module (4);

The frequency converter further comprises a circuit connecting piece (5), the circuit connecting piece (5) spans the capacitor module (7), one end of the circuit connecting piece (5) is electrically connected with the rectifier module (3), the other end of the circuit connecting piece (5) is electrically connected with the inverter module (4), the middle part of the circuit connecting piece (5) is electrically connected with the capacitor module (7), and the circuit connecting piece (5) is used for electrically connecting the rectifier module (3), the capacitor module (7) and the inverter module (4), so that output signals of the rectifier module (3) are filtered by the capacitor module (7) and then input to the inverter module (4).

12. The frequency converter according to claim 11, characterized in that the circuit connection (5) is a busbar, which has a positive busbar (17) and a negative busbar (18), which is electrically connected to the positive stud of the capacitive module (7) via the positive busbar (17) and to the negative stud of the capacitive module (7) via the negative busbar (18);

The negative electrode busbar (18) is close to the capacitor module (7) relative to the positive electrode busbar (17), a protruding portion (171) is arranged on the positive electrode busbar (17), the positive electrode busbar (17) is electrically connected with a positive electrode protruding column of the capacitor module (7) through the protruding portion (171), and a first avoidance hole (183) for the protruding portion (171) to penetrate is formed in the negative electrode busbar (18).

13. The frequency converter according to claim 12, wherein:

The negative electrode busbar (18) is provided with a bolt through hole (182), and a first bolt (20 a) is used for fixing the negative electrode busbar (18) to a negative electrode convex column of the capacitor module (7) through the bolt through hole (182), and the positive electrode busbar (17) is also provided with a second avoidance hole (172) for avoiding the first bolt (20 a);

And/or the protruding part (171) is fixed with the positive pole protruding column of the capacitor module (7) through a second bolt (20 b).

14. The frequency converter according to any of claims 11-13, wherein:

The other end of the circuit connecting piece (5) is provided with a pin (181), the other end of the circuit connecting piece (5) is electrically connected with the inversion module (4) through the pin (181), and the pin (181) is attached to the inversion module (4).

15. The frequency converter according to any of claims 11-13, characterized by further comprising an incoming line assembly (6), the incoming line assembly (6) crossing the capacitive module (7), one end of the incoming line assembly (6) being located at a side of the capacitive module (7) facing away from the rectifying module (3), the other end of the incoming line assembly (6) being located at a side of the capacitive module (7) being close to the rectifying module (3), and the other end of the incoming line assembly (6) being electrically connected to the rectifying module (3), the incoming line assembly (6) introducing three-phase electricity through one end thereof and introducing three-phase electricity to the rectifying module (3) through the other end thereof;

the incoming line assembly (6) is located on one side of the circuit connecting piece (5) which faces away from the capacitor module (7).

16. An air compressor characterized by comprising the frequency converter of any one of claims 10-15.