Frequency converter heat dissipation structure, frequency converter and air compressor

Abstract

The utility model provides a frequency converter heat radiation structure, a frequency converter and an air compressor, and the frequency converter heat radiation structure comprises a first radiator and a second radiator. The first radiator is used for radiating a rectifier module of the frequency converter; the second radiator is used for radiating the inversion module of the frequency converter; the first heat radiator is provided with a first heat radiation air channel, the second heat radiator is provided with a second heat radiation air channel, the heat radiation structure of the frequency converter further comprises a communication air channel communicated with the first heat radiation air channel and the second heat radiation air channel, and the communication air channel is used for accommodating at least one part of a capacitor module of the frequency converter. Therefore, the heat of the capacitor module is dissipated. According to the technical scheme of the utility model, the first heat dissipation air channel, the communication air channel and the second heat dissipation air channel are matched to form the air channel, and when a heat dissipation fan in the frequency converter blows air to the air channel, air can flow through the communication air channel to dissipate heat of the capacitor module in the communication air channel, so that the heat dissipation effect of the capacitor module can be improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of frequency converter, specifically related to a frequency converter heat dissipation structure, frequency converter and air compressor. BACKGROUND

[0002] The frequency converter is the application frequency conversion technology and microelectronic technology, through the change motor working frequency, the power control equipment of control AC motor. Frequency converter mainly by rectifier module, capacitor module, inverter module, brake unit, drive unit, detection unit and micro processing unit etc. constitute, wherein, rectifier module is used for converting input three-phase electricity into DC, capacitor module is used for filtering the DC of rectifier module output, inverter module is used for converting the DC after filtering of capacitor module into AC. Frequency converter generally designs the heat dissipation structure and carries out heat dissipation to rectifier module and inverter module, but the heat dissipation effect of capacitor module is poor, and it needs to be optimized. UTILITY MODEL CONTENTS

[0003] Therefore, the utility model provides a kind of frequency converter heat dissipation structure, frequency converter and air compressor, and the main technical problems to be solved are: how to improve the heat dissipation effect of capacitor module in frequency converter.

[0004] To solve the above problems, the utility model provides a kind of frequency converter heat dissipation structure, it includes:

[0005] First radiator, for the heat dissipation of rectifier module of frequency converter;

[0006] Second radiator, for the heat dissipation of inverter module of frequency converter;

[0007] Wherein, the first radiator has first heat dissipation air duct, the second radiator has second heat dissipation air duct, the frequency converter heat dissipation structure further includes the communication air duct that the first heat dissipation air duct and the second heat dissipation air duct are communicated, and the communication air duct is used to accommodate at least a part of capacitor module of frequency converter, to carry out the heat dissipation of the capacitor module.

[0008] In some embodiments, the first heat dissipation air duct has first air port, the second heat dissipation air duct has second air port;The first air port and the second air port are opposite, and have interval between the two;Wherein, the frequency converter heat dissipation structure forms the communication air duct at the interval.

[0009] In some embodiments, the first radiator includes first heat dissipation fin, the number of the first heat dissipation fin is more than two, and is sequentially parallel spaced arrangement, and the first heat dissipation flow channel is formed between each adjacent two first heat dissipation fin, and each first heat dissipation flow channel cooperates to form the first heat dissipation air duct, and the opening on the same side of each first heat dissipation flow channel cooperates to form the first air port.

[0010] In some embodiments, the first heat sink further comprises a first substrate having opposite first and second a sides, each of the first heat dissipation fins is disposed on the first substrate and located at the first a side; and the first heat sink is connected with the rectifier module through the second a side to dissipate heat for the rectifier module.

[0011] In some embodiments, the second heat sink comprises second heat dissipation fins, the number of the second heat dissipation fins is more than two and the second heat dissipation fins are arranged in parallel and spaced apart in sequence, each of two adjacent second heat dissipation fins forms a second heat dissipation flow channel, each second heat dissipation flow channel cooperates to form the second heat dissipation air duct, and the openings on the same side of each second heat dissipation flow channel cooperate to form the second air port.

[0012] In some embodiments, the second heat sink further comprises a second substrate having opposite first and second b sides, each of the second heat dissipation fins is disposed on the second substrate and located at the first b side; and the second heat sink is connected with the inverter module through the second b side to dissipate heat for the inverter module.

[0013] In some embodiments, the frequency converter heat dissipation structure further comprises a first connecting plate and a second connecting plate, the first connecting plate and the second connecting plate are located on opposite sides of the interval to form side walls of opposite sides of the communication air duct.

[0014] In some embodiments, the first connecting plate is provided with a bayonet for inserting a capacitor of the capacitor module into the communication air duct, the bayonet is also used for clamping the capacitor; and the second connecting plate is used for supporting the capacitor inserted into the communication air duct.

[0015] In some embodiments, when the first heat sink comprises first heat dissipation fins, the number of the first heat dissipation fins is more than two and the first heat dissipation fins are arranged in parallel and spaced apart in sequence, and the second heat sink comprises second heat dissipation fins, the number of the second heat dissipation fins is more than two and the second heat dissipation fins are arranged in parallel and spaced apart in sequence,

[0016] each of the first heat dissipation fins is arranged in sequence along a first direction of the frequency converter heat dissipation structure, each of the second heat dissipation fins is also arranged in sequence along the first direction, the first connecting plate, the first heat sink, the second connecting plate and the second heat sink cooperatively enclose the communication air duct, and the communication air duct has openings at both ends in the first direction.

[0017] The utility model also provides a frequency converter which comprises the frequency converter heat dissipation structure of any one of the above.

[0018] In some embodiments, the rectifier module is disposed on the first heat sink, the inverter module is disposed on the second heat sink, and the capacitor module is located between the rectifier module and the inverter module.

[0019] The frequency converter further comprises a circuit connecting member, the circuit connecting member spans the capacitor module, one end of the circuit connecting member is electrically connected with the rectifier module, the other end of the circuit connecting member is electrically connected with the inverter module, and the middle part of the circuit connecting member is electrically connected with the capacitor module; the circuit connecting member is used for electrically connecting the rectifier module, the capacitor module and the inverter module, so that the output signal of the rectifier module is filtered by the capacitor module and then input to the inverter module.

[0020] In some embodiments, the circuit connecting member is a busbar, the busbar has a positive busbar and a negative busbar, the busbar is electrically connected with the positive protruding column of the capacitor module through the positive busbar, and is electrically connected with the negative protruding column of the capacitor module through the negative busbar.

[0021] The negative busbar is closer to the capacitor module than the positive busbar, the positive busbar is provided with a protruding part, the positive busbar is electrically connected with the positive protruding column of the capacitor module through the protruding part, and the negative busbar is provided with a first avoiding hole through which the protruding part passes.

[0022] In some embodiments, the negative busbar is provided with a bolt through hole, a first bolt is used for fixing the negative busbar to the negative protruding column of the capacitor module through the bolt through hole, and the positive busbar is further provided with a second avoiding hole for avoiding the first bolt.

[0023] And / or, the protruding part is fixed to the positive protruding column of the capacitor module through a second bolt.

[0024] In some embodiments, the other end of the circuit connecting member has a pin, the other end of the circuit connecting member is electrically connected with the inverter module through the pin, and the pin is attached to the inverter module.

[0025] In some embodiments, the frequency converter further comprises a wire inlet assembly, the wire inlet assembly spans the capacitor module, one end of the wire inlet assembly is located on the side of the capacitor module away from the rectifier module, the other end of the wire inlet assembly is located on the side of the capacitor module 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 power through one end thereof, and introduces three-phase power to the rectifier module through the other end thereof.

[0026] The wire inlet assembly is located on the side of the circuit connecting member away from the capacitor module.

[0027] The utility model also provides a kind of air compressor, it includes the frequency converter of any one of the above.

[0028] The utility model provides a kind of frequency converter heat dissipation structure, frequency converter and air compressor have following beneficial effects:

[0029] 1, the first heat dissipation air duct, the communication air duct and the second heat dissipation air duct cooperate to form air duct, when the heat dissipation fan in frequency converter blows, wind can flow through communication air duct, and the capacitor module in communication air duct is heat-dissipated, to improve the heat dissipation effect of capacitor module.

[0030] 2, the power of first radiator can be adapted to the power of rectifier module, the power of second radiator is adapted to the power of inverter module. Rectifier module and inverter module of frequency converter are respectively used one radiator to heat dissipation alone, can improve heat dissipation efficiency, also facilitate to the temperature of rectifier module and inverter module respectively real-time monitoring, prevent the heat of different modules from being influenced.

[0031] 3, inverter module and rectifier module are arranged at the two sides of capacitor module, such as front and back two sides, and circuit connecting piece is electrically connected with inverter module and rectifier module across capacitor module, like "bridge" obstacle avoidance, through the bridge type connection circuit, the electromagnetic interference between rectifier module and inverter module is reduced, the stability of system is improved, the layout design of line is optimized, and disassembly is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the embodiment of the utility model or the technical scheme in the prior art, the following will be briefly introduced. The drawings needed in the description of embodiment or prior art are only exemplary, and other implementation drawings can be obtained according to the provided drawings without paying creative labor for the person skilled in the art.

[0033] Figure 1 It is the assembly schematic view of frequency converter heat dissipation structure and capacitor module of the utility model;

[0034] Figure 2 It is the partial structure schematic view of a kind of frequency converter provided by an embodiment of the utility model;

[0035] Figure 3 It is Figure 2 another view schematic view of the structure of frequency converter in

[0036] Figure 4 It is the connection schematic view of rectifier module, capacitor module and inverter module three;

[0037] Figure 5is Figure 4 a top view of the structure;

[0038] Figure 6 is a structure diagram of the positive busbar;

[0039] Figure 7 is a structure diagram of the negative busbar.

[0040] Reference signs are:

[0041] 1, first heat sink; 2, second heat sink; 3, rectifier module; 4, inverter module; 5, circuit connecting piece; 6, incoming line assembly; 7, capacitor module; 8, first connecting plate; 9, second connecting plate; 10, communication air duct; 11, first base plate; 12, first heat dissipation fin; 11a, first a side; 11b, second a side; 13, rectifier positive metal sheet; 14, rectifier negative metal sheet; 15, contactor; 17, positive busbar; 18, negative busbar; 19, outgoing line assembly; 20a, first bolt; 20b, second bolt; 21, second base plate; 22, second heat dissipation fin; 21a, first b side; 21b, second b side; 31, capacitor; 61, metal sheet; 81, bayonet; 100, first heat dissipation air duct; 101, first air port; 171, protruding part; 172, second avoiding hole; 181, pin; 182, bolt via hole; 183, first avoiding hole; 200, second heat dissipation air duct; 201, second air port; a, first direction. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0043] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and in the absence of the opposite description, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the protection scope of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0044] For the purposes of this description, spatially relative terms, such as "above", "below", "up", "down", "between", "within", "left", "right", "front", "back", "upper", "lower", "horizontal", "vertical", "above", "below", "up", "down", "top", "bottom", "side" (and the like) are intended to describe the relative position of one device or feature to another device or feature as illustrated in the figures. These spatially relative terms are in no way intended to limit the devices in the figures to the positions shown. These devices can be in different positions (rotated 90 degrees or at other orientations) and the spatially relative terms will be interpreted accordingly. For example, if a device in the figures is turned over, one device that was "above" another device would then be "below" the other device. Thus, the exemplary term "above" can encompass both an orientation of above and below. The devices can be oriented in any of various ways (rotated 90 degrees or at other orientations) and the spatially relative terms used herein will be interpreted accordingly.

[0045] In addition, it should be noted that the use of "first", "second", and the like words of similar meaning used in the description and claims to describe various embodiments is merely intended to distinguish between similar elements and is not intended to limit the scope of the present application. Therefore, these words should not be interpreted as having special meaning unless otherwise stated.

[0046] For the purposes of this description, spatially relative terms, such as "above", "below", "up", "down", "between", "within", "left", "right", "front", "back", "upper", "lower", "horizontal", "vertical", "above", "below", "up", "down", "top", "bottom", "side" (and the like) are intended to describe the relative position of one device or feature to another device or feature as illustrated in the figures. These spatially relative terms are in no way intended to limit the devices in the figures to the positions shown. These devices can be in different positions (rotated 90 degrees or at other orientations) and the spatially relative terms will be interpreted accordingly. For example, if a device in the figures is turned over, one device that was "above" another device would then be "below" the other device. Thus, the exemplary term "above" can encompass both an orientation of above and below. The devices can be oriented in any of various ways (rotated 90 degrees or at other orientations) and the spatially relative terms used herein will be interpreted accordingly. Figures 1-3 As shown in the drawings, according to the embodiments of the present application, a frequency converter cooling structure is provided, which comprises a first radiator 1 and a second radiator 2. The first radiator 1 is used to cool the rectifier module 3 of the frequency converter. The second radiator 2 is used to cool the inverter module 4 of the frequency converter. The first radiator 1 has a first cooling air duct 100, and the second radiator 2 has a second cooling air duct 200. The frequency converter cooling structure further comprises a communication air duct 10 which communicates the first cooling air duct 100 and the second cooling air duct 200. The communication air duct 10 is used to accommodate at least a part of the capacitor module 7 of the frequency converter to cool the capacitor module 7.

[0047] In the above example, the first cooling air duct 100, the communication air duct 10 and the second cooling air duct 200 cooperate to form an air duct. When the cooling fan in the frequency converter blows air into the air duct, the air can flow through the communication air duct 10 to cool the capacitor module 7 in the communication air duct 10, thereby improving the cooling effect of the capacitor module 7.

[0048] The power of the first radiator 1 can be matched with the power of the rectifier module 3, and the power of the second radiator 2 can be matched with the power of the inverter module 4. The rectifier module 3 and the inverter module 4 of the frequency converter are cooled separately by one radiator respectively, which can not only improve the cooling efficiency, but also facilitate real-time monitoring of the temperature of the rectifier module 3 and the inverter module 4 respectively, preventing the influence of heat from different modules.

[0049] The positions of the first heat dissipation air duct 100, the communication air duct 10 and the second heat dissipation air duct 200 can be set according to actual conditions. In a specific application example, as shown in Figure 1 and Figure 2 the first heat dissipation air duct 100, the communication air duct 10 and the second heat dissipation air duct 200 form a stepped heat dissipation air duct. Specifically, a first step can be formed between the first heat dissipation air duct 100 and the communication air duct 10, and a second step can be formed between the communication air duct 10 and the second heat dissipation air duct 200.

[0050] In order to form the communication air duct 10, in some embodiments, as shown in Figure 2 the first heat dissipation air duct 100 has a first air port 101, and the second heat dissipation air duct 200 has a second air port 201. The first air port 101 is opposite to the second air port 201, and there is a gap between the first air port 101 and the second air port 201. The communication air duct 10 is formed at the gap.

[0051] In the above example, air can flow into the communication air duct 10 from the first air port 101 and then flow out from the second air port 201, or air can flow into the communication air duct 10 from the second air port 201 and then flow out from the first air port 101. Specifically, whether air flows into the communication air duct 10 from the first air port 101 or from the second air port 201 can be designed according to the position of the heat dissipation fan.

[0052] In some embodiments, as shown in Figures 1-3 the first heat dissipation device 1 can include first heat dissipation fins 12, which can be in the form of plates. The number of the first heat dissipation fins 12 is two or more, and the first heat dissipation fins 12 are arranged in parallel and at intervals. Each two adjacent first heat dissipation fins 12 form a first heat dissipation flow channel. The first heat dissipation flow channels cooperate to form the first heat dissipation air duct 100, and the openings on the same side of the first heat dissipation flow channels cooperate to form the first air port 101.

[0053] In the above example, the first heat dissipation fins 12 are arranged to facilitate heat dissipation of the first heat dissipation air duct 100.

[0054] In some embodiments, as shown in Figure 1As shown, the first heat sink 1 can further include a first base plate 11 having opposite first and second a sides 11a and 11b, and each of the first heat dissipation fins 12 is disposed on the first base plate 11 and located at the first a side 11a. For example, each of the first heat dissipation fins 12 can be integrally formed at the first a side 11a of the first base plate 11, so as to improve the connection stability of each of the first heat dissipation fins 12 and the first base plate 11. The first heat sink 1 is connected with the rectifier module 3 through the second a side 11b to dissipate heat for the rectifier module 3.

[0055] In the above example, since each of the first heat dissipation fins 12 is disposed at the same side (i.e., the first a side 11a) of the first base plate 11, it is beneficial to install the rectifier module 3 at the other side (i.e., the second a side 11b) of the first base plate 11, avoiding interference caused by the first heat dissipation fins 12 to the installation of the rectifier module 3.

[0056] In some embodiments, as shown in Figure 1 The second heat sink 2 can include second heat dissipation fins 22, and the number of the second heat dissipation fins 22 is two or more and arranged in parallel and spaced apart. Each of the second heat dissipation fins 22 is disposed at the same side (i.e., the first b side 21a) of the second base plate 21, and each of the second heat dissipation fins 22 is integrally formed at the first b side 21a of the second base plate 21, so as to improve the connection stability of each of the second heat dissipation fins 22 and the second base plate 21.

[0057] In the above example, the second heat dissipation fins 22 are beneficial to dissipate heat for the second heat dissipation air duct 200.

[0058] In some embodiments, as shown in Figure 1 The second heat sink 2 can further include a second base plate 21 having opposite first and second b sides 21a and 21b. Each of the second heat dissipation fins 22 is disposed on the second base plate 21 and located at the first b side 21a. For example, each of the second heat dissipation fins 22 can be integrally formed at the first b side 21a of the second base plate 21, so as to improve the connection stability of each of the second heat dissipation fins 22 and the second base plate 21. The second heat sink 2 is connected with the inverter module 4 through the second b side 21b to dissipate heat for the inverter module 4.

[0059] In the above example, since each of the second heat dissipation fins 22 is disposed at the same side (i.e., the first b side 21a) of the second base plate 21, it is beneficial to install the inverter module 4 at the other side (i.e., the second b side 21b) of the second base plate 21, avoiding interference caused by the second heat dissipation fins 22 to the installation of the inverter module 4.

[0060] 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.

[0061] 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 inverter heat dissipation structure, when the rectifier module 3 is installed on the second a-side 11b and the inverter module 4 is installed on the second b-side 21b, the rectifier module 3 and the inverter module 4 can be both located on the same side of the inverter heat dissipation structure, which is conducive to the electrical connection of the rectifier module 3 and the inverter module 4.

[0062] In some embodiments, as shown in Figures 1-3 the inverter heat dissipation structure further comprises a first connecting plate 8 and a second connecting plate 9. The first connecting plate 8 and the second connecting plate 9 are located on opposite sides of the aforementioned interval to form side walls on opposite sides of the aforementioned communication air duct 10.

[0063] In the above example, by arranging the first connecting plate 8 and the second connecting plate 9 to form side walls on opposite sides of the communication air duct 10, air leakage of the communication air duct 10 from the side where the first connecting plate 8 is located and the side where the second connecting plate 9 is located can be avoided, thereby improving the heat dissipation efficiency of the capacitor module 7 in the communication air duct 10.

[0064] In some embodiments, as shown in Figure 2 the first connecting plate 8 and the second connecting plate 9 can both be sheet metal parts. The two ends of the first connecting plate 8 can be connected to the first heat sink 1 and the second heat sink 2 respectively, so that the first heat sink 1 and the second heat sink 2 form an integral whole through the first connecting plate 8 and the second connecting plate 9. The second connecting plate 9 can be connected to the first heat sink 1.

[0065] In some embodiments, as shown in Figure 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 air duct 10. The bayonet 81 is also used for clamping the capacitor 31. The second connecting plate 9 is used to support the capacitor 31 inserted into the communication air duct 10.

[0066] In the above example, the capacitor 31 is inserted into the communication air duct 10 through the bayonet 81, the upper part of the capacitor 31 is clamped by the bayonet 81, and the lower part of the capacitor 31 is supported by the second connecting plate 9. The cooperation of the bayonet 81 and the second connecting plate 9 can keep the capacitor 31 stable.

[0067] In some embodiments, as shown in Figures 1-3As shown, when the first heat sink 1 includes the first heat dissipation fins 12, the number of the first heat dissipation fins 12 is more than two, and the first heat dissipation fins 12 are arranged in parallel and spaced in sequence, and the second heat sink 2 includes the second heat dissipation fins 22, the number of the second heat dissipation fins 22 is more than two, and the second heat dissipation fins 22 are arranged in parallel and spaced in sequence, each of the first heat dissipation fins 12 can be arranged in sequence along the first direction a of the frequency converter heat dissipation structure of the utility model, and each of the second heat dissipation fins 22 can also be arranged in sequence along the first direction a of the frequency converter heat dissipation structure of the utility model. The first connecting plate 8, the first heat sink 1, the second connecting plate 9 and the second heat sink 2 cooperate to enclose the communication air duct 10, and the two ends of the communication air duct 10 in the first direction a have openings.

[0068] The first direction a can be the length direction, the width direction or the height direction of the frequency converter heat dissipation structure of the utility model. The first direction a is taken as the width direction of the frequency converter heat dissipation structure of the utility model for example. When the first direction a is the width direction of the frequency converter heat dissipation structure, since each of the first heat dissipation fins 12 and each of the second heat dissipation fins 22 are arranged in sequence along the width direction of the frequency converter heat dissipation structure, the first heat dissipation air duct 100 formed by the gaps of the first heat dissipation fins 12 is a channel for air flowing along the length direction of the frequency converter heat dissipation structure, and similarly, the second heat dissipation air duct 200 formed by the gaps of the second heat dissipation fins 22 is also a channel for air flowing along the length direction of the frequency converter heat dissipation structure. When the frequency converter heat dissipation structure is installed in the frequency converter shell, the side walls on both sides of the frequency converter shell in the width direction can be used to cover the openings of the communication air duct 10 at both ends of the frequency converter shell in the width direction, so as to further reduce the air leakage of the communication air duct 10 and improve the heat dissipation of the capacitor module 7 in the communication air duct 10. In addition, the space in the length direction of the frequency converter shell can be used to provide a space for the first heat dissipation air duct 100 and the second heat dissipation air duct 200 to flow air.

[0069] The utility model also provides a frequency converter which can include the frequency converter heat dissipation structure of any one of the above. Since the frequency converter adopts the frequency converter heat dissipation structure, 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 for the capacitor module 7 in the communication air duct 10, so as to improve the heat dissipation effect of the capacitor module 7.

[0070] In some embodiments, the rectifier module 3 is arranged on the first heat sink 1, the inverter module 4 is arranged on the second heat sink 2, and the capacitor module 7 is located between the rectifier module 3 and the inverter module 4.

[0071] The rectifier module 3 converts the input three-phase power into DC power output. The capacitor module 7 filters the DC power output from the rectifier module 3. The inverter module 4 converts the filtered DC power from the capacitor module 7 into AC power output.

[0072] It should be noted that the structures of the rectifier module 3, capacitor module 7 and inverter module 4 mentioned above are all existing technologies and will not be described in detail here.

[0073] In some implementations, such as Figures 2-4 As shown, the aforementioned frequency converter also includes a circuit connector 5, which can be a busbar or similar component. The circuit connector 5 spans the capacitor module 7. One end of the circuit connector 5 is electrically connected to the rectifier module 3, the other end is electrically connected to the inverter module 4, and the middle portion is electrically connected to the capacitor module 7. Specifically, the circuit connector 5 electrically connects the rectifier module 3, the capacitor module 7, and the inverter module 4, allowing the output signal of the rectifier module 3 to be filtered by the capacitor module 7 before being input to the inverter module 4.

[0074] In the example above, the inverter module 4 and the rectifier module 3 are respectively arranged on both sides of the capacitor module 7, such as the front and rear sides. The circuit connector 5 spans the capacitor module 7 and is electrically connected to the inverter module 4 and the rectifier module 3, resembling a "bridge" to avoid obstacles. Therefore, this type of connection circuit of the circuit connector 5 can sometimes be called a "bridge connection circuit". Through this bridge connection circuit, the electromagnetic interference between the rectifier module 3 and the inverter module 4 is reduced, the system stability is improved, the circuit layout design is optimized, and disassembly and assembly are more convenient.

[0075] In a specific application example, the aforementioned capacitor module 7 is taller than both the rectifier modules 3 and the inverter module 4 on both sides, forming a convex shape structure with the middle being high and the sides being low.

[0076] In some implementations, such as Figure 3 , Figure 6 and Figure 7 As shown, 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 to the positive terminal of the capacitor module 7 through the positive busbar 17, and is electrically connected to the negative terminal of the capacitor module 7 through the negative busbar 18. The negative busbar 18 is closer to the capacitor module 7 than the positive busbar 17. The positive busbar 17 has a protrusion 171, through which it is electrically connected to the positive terminal of the capacitor module 7, and the negative busbar 18 has a first clearance hole 183 through which the protrusion 171 passes.

[0077] In the example above, by separating the positive busbar 17 and the negative busbar 18, it is possible to prevent the positive busbar 17 and the negative busbar 18 from coming into contact and causing a short circuit.

[0078] In some embodiments, the aforementioned negative busbar 18 can be provided with a bolt through hole 182, and the first bolt 20a is used to pass through the bolt through hole 182 to fix the negative busbar 18 to the negative protruding column of the capacitor module 7. The positive busbar 17 is also provided with a second clearance hole 172 for avoiding the first bolt 20a to avoid the positive busbar 17 from contacting the first bolt 20a and causing short circuit.

[0079] In some embodiments, the aforementioned protruding part 171 can be fixed to the positive protruding column of the capacitor module 7 through the second bolt 20b to improve the stability of the electrical connection between the protruding part 171 and the positive protruding column.

[0080] It should be noted that the aforementioned protruding part 171 can be processed in the mode of a convex mold.

[0081] In some embodiments, the other end of the aforementioned circuit connecting piece 5 can have a pin 181, and the other end of the circuit connecting piece 5 is electrically connected to the inverter module 4 through the pin 181. Among them, the pin 181 is attached to the inverter module 4 to prevent the problem of not fitting.

[0082] In some embodiments, as shown in Figures 2-3 The aforementioned frequency converter can also include a wire inlet assembly 6, and the wire inlet assembly 6 spans the capacitor module 7, one end of the wire inlet assembly 6 is located on the side of the capacitor module 7 away from the rectifier module 3, the other end of the wire inlet assembly 6 is located on the side of the capacitor module 7 close to the rectifier module 3, and the other end of the wire inlet assembly 6 is electrically connected to the rectifier module 3. The wire inlet assembly 6 introduces three-phase power through one end thereof, and introduces three-phase power to the rectifier module 3 through the other end thereof.

[0083] In the aforementioned example, by making the wire inlet assembly 6 span the capacitor module 7, the space utilization inside the frequency converter can be greatly improved, the layout of the circuit is more convenient, and the disassembly and assembly are more convenient.

[0084] In some embodiments, as shown in Figure 4 The aforementioned wire inlet assembly 6 can include three metal sheets 61, which can all be copper sheets. The wire inlet assembly 6 spans the capacitor module 7 through the three metal sheets 61, one end of the three metal sheets 61 constitutes one end of the aforementioned wire inlet assembly 6 to introduce three-phase power. The other end of the three metal sheets 61 constitutes the other end of the aforementioned wire inlet assembly 6 to introduce three-phase power to the rectifier module 3.

[0085] In some embodiments, the aforementioned wire inlet assembly 6 is located on the side of the circuit connecting piece 5 away from the capacitor module 7 to facilitate the wire inlet assembly 6 to introduce three-phase power.

[0086] In a specific application example, as shown in Figures 3-5As shown, each of the above three metal sheets 61 can be in a "ji" shape. Among them, the three "ji"-shaped metal sheets 61 form an incoming line component 6. The incoming line component 6 straddles the capacitor module 7 and is located on the side of the circuit connector 5, such as a busbar, away from the capacitor module 7. The busbar has opposite first and second ends. The busbar is connected to the rectification module 3 through the first end and is connected to the inversion module 4 through the second end. The incoming line component 6 is connected to the rectification module 3 at the rear. The incoming line component 6 is connected to the input end of the rectification module 3 through bolts. For example, the incoming line component 6 can be fixed to the diode connection terminal at the input end of the rectification module 3 through bolts. The negative pole of the output end of the rectification module 3 is connected to the negative pole of the first end of the busbar through a rectification negative metal sheet 14, such as a copper sheet; the positive pole of the output end of the rectification module 3 is first connected to the contactor 15 through a rectification positive metal sheet 13, such as a copper sheet, and then connected to the positive pole of the first end of the busbar, thus forming a complete rectification circuit. The positive and negative poles of the second end of the busbar are both connected to the inversion module 4 through pins, and the pins can be completely fitted to the input end of the inversion module 4. The output end of the inversion module 4 is connected to the outgoing line component 19, forming a complete inversion circuit. The middle of the positive busbar 17 has a first protrusion connected to the positive pole of the capacitor module 7, and the middle of the negative busbar 18 has a second protrusion connected to the negative pole of the capacitor module​​​​​​​​The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A heat dissipation structure for a frequency converter, characterized by: The application relates to a variable frequency converter heat dissipation structure. The application relates to a variable frequency converter heat dissipation structure. The application relates to a variable frequency converter heat dissipation structure. The application relates to a variable frequency converter heat dissipation structure. The application relates to a variable frequency converter heat dissipation structure. The application relates to a variable frequency converter heat dissipation structure. The application relates to a variable frequency converter heat dissipation structure. The application relates to a variable frequency converter heat dissipation structure. The application relates to a variable frequency converter heat dissipation structure. The application relates to a variable frequency converter heat dissipation structure. 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The application relates to a variable frequency converter heat dissipation structure. The application relates to a variable frequency converter heat dissipation structure. The application relates to a variable frequency converter heat dissipation structure. The application relates to a variable frequency converter heat dissipation structure. The application relates to a variable frequency converter heat dissipation structure. The application relates to a variable frequency converter heat dissipation structure. The application relates to a variable frequency converter heat dissipation structure. The application relates to a variable frequency converter heat dissipation structure. The application relates to a variable frequency converter heat dissipation structure. The application relates to a variable frequency converter heat dissipation structure. The application relates to a variable frequency converter heat dissipation structure. The application relates to a variable frequency converter heat dissipation structure. The application relates to a variable frequency converter heat dissipation structure. The application relates to a variable frequency converter heat dissipation structure. The application relates to a variable frequency converter heat dissipation structure. The application relates to a variable frequency The second heat sink (2) further comprises a second base plate (21) having opposite first b side (21a) and second b side (21b), each of the second heat dissipation fins (22) is arranged on the second base plate (21) and is located on the first b side (21a); wherein the second heat sink (2) is connected with the inverter module (4) through the second b side (21b) to dissipate heat for the inverter module (4).

7. The frequency converter heat sink structure of any of claims 2-4, 6, wherein: Further comprising a first connecting plate (8) and a second connecting plate (9), the first connecting plate (8) and the second connecting plate (9) are located on opposite sides of the interval to form the side walls of the communication air duct (10) on opposite sides.

8. The frequency converter heat dissipation structure according to claim 7, characterized in that: 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), and the bayonet (81) is also used for clamping the capacitor (31); the second connecting plate (9) is used to support the capacitor (31) inserted into the communication air duct (10).

9. The frequency converter heat sink structure of claim 7, wherein: When the first heat sink (1) comprises first heat dissipation fins (12), the number of the first heat dissipation fins (12) is more than two and is arranged in parallel and at intervals, and the second heat sink (2) comprises second heat dissipation fins (22), the number of the second heat dissipation fins (22) is more than two and is arranged in parallel and at intervals, Each of the first heat dissipation fins (12) is arranged in sequence along the first direction (a) of the frequency converter heat dissipation structure, and each of the second heat dissipation fins (22) is also arranged in sequence along the first direction (a), the first connecting plate (8), the first heat sink (1), the second connecting plate (9) and the second heat sink (2) cooperate to enclose the communication air duct (10), and the two ends of the communication air duct (10) in the first direction (a) have openings.

10. A frequency converter characterized by: The frequency converter heat dissipation structure according to any one of claims 1-9.

11. The frequency converter of claim 10, wherein: The rectifier module (3) is arranged on the first heat sink (1), the inverter module (4) is arranged on the second heat sink (2), and the capacitor module (7) is located between the rectifier module (3) and the inverter module (4); Wherein, 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), and the middle part of the circuit connecting piece (5) is electrically connected with the capacitor module (7); wherein, 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 the output signal of the rectifier module (3) is filtered by the capacitor module (7) and then input to the inverter module (4).

12. The frequency converter of claim 11, wherein: The circuit connecting piece (5) is a busbar, the busbar has a positive busbar (17) and a negative busbar (18), the busbar is electrically connected with the positive stud of the capacitor module (7) through the positive busbar (17), and is electrically connected with the negative 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 part (171), the positive busbar (17) is electrically connected with the positive stud of the capacitor module (7) through the protruding part (171), and the negative busbar (18) is provided with a first avoiding hole (183) for the protruding part (171) to pass through.

13. The frequency converter of claim 12, wherein: The negative busbar (18) is provided with a bolt through hole (182), a first bolt (20a) is used to pass through the bolt through hole (182) to fix the negative busbar (18) to the negative stud of the capacitor module (7); The positive busbar (17) is also provided with a second avoiding hole (172) for avoiding the first bolt (20a); And / or, the protruding part (171) is fixed with the positive stud of the capacitor module (7) through a second bolt (20b).

14. The frequency converter of any one of claims 11-13, wherein: The other end of the circuit connecting piece (5) has a pin (181), the other end of the circuit connecting piece (5) is electrically connected with the inverter module (4) through the pin (181), and the pin (181) is attached to the inverter module (4).

15. The frequency converter of any of claims 11-13, wherein: Further comprising a wire inlet assembly (6), the wire inlet assembly (6) spans the capacitor module (7), one end of the wire inlet assembly (6) is located on the side of the capacitor module (7) away from the rectifier module (3), the other end of the wire inlet assembly (6) is located on the side of the capacitor module (7) close to the rectifier module (3), and the other end of the wire inlet assembly (6) is electrically connected with the rectifier module (3), the wire inlet assembly (6) introduces three-phase power through one end thereof, and introduces three-phase power to the rectifier module (3) through the other end thereof; Wherein, the wire inlet assembly (6) is located on the side of the circuit connecting piece (5) away from the capacitor module (7).

16. An air compressor, characterized by: The frequency converter of any one of claims 10-15.

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