Frequency converter and air conditioner

Abstract

The utility model belongs to the technical field of air conditioners, and particularly provides a frequency converter and an air conditioner. The utility model aims to solve the problem that the creepage phenomenon is easy to occur between the anode busbar and the cathode busbar in the existing frequency converter. Therefore, the frequency converter comprises a base, at least one rectifier, an anode busbar 131, a cathode busbar and an insulation device. Wherein the rectifier is mounted on the base and comprises an alternating current input end, a positive electrode output end and a negative electrode output end respectively. And the positive busbar is connected with the positive output end. And the negative busbar is connected with the negative output end. The insulation device is fixedly connected with the base and comprises a first insulation plate located between the alternating current input end and the positive electrode output end and a second insulation plate located between the positive electrode output end and the negative electrode output end, so that the creepage phenomenon between the positive electrode busbar and the negative electrode busbar or the alternating current input end is prevented. The utility model solves the technical problems.

Description

Technical Field

[0001] The utility model belongs to the technical field of air conditioners, and specifically provides a frequency converter and an air conditioner. Background Art

[0002] The inverter of the air conditioner is one of the core components of the air conditioner. It gives the air conditioner the ability of "frequency conversion", enabling it to dynamically adjust the operating frequency of the compressor during operation, thereby achieving precise control of the output power of the air conditioning system.

[0003] The inverter of the existing air conditioner is generally an AC-DC-AC inverter, which mainly includes a rectifier module, a filter module, an inverter module and a frequency control module. Among them, the rectifier module is used to convert the mains (industrial frequency AC power) into DC power, the filter module is used to reduce the pulsation in the DC power, the inverter module is used to convert the DC power into AC power, and the frequency control module is used to control the frequency of the inverter module output voltage, thereby realizing the precise control of the frequency of the AC power supply to the compressor.

[0004] Among them, the distance between the positive busbar and the negative busbar at the rectifier module in the inverter is small, and because the voltage of the positive busbar and the negative busbar is large, creepage is easy to occur between the positive busbar and the negative busbar. Creepage not only increases the loss of electric energy, but also generates arcs, which can easily burn equipment and personnel, posing a threat to the safety of equipment and personnel. Utility Model Content

[0005] One purpose of the utility model is to solve the problem that creepage easily occurs between the positive busbar and the negative busbar in the existing frequency converter.

[0006] To achieve the above object, the utility model provides a frequency converter in a first aspect, comprising:

[0007] Pedestal;

[0008] at least one rectifier, mounted on the base and comprising an AC input terminal, a positive output terminal and a negative output terminal;

[0009] A positive busbar connected to the positive output terminal;

[0010] A negative busbar connected to the negative output terminal;

[0011] An insulating device is fixedly connected to the base and includes a first insulating plate located between the AC input terminal and the positive output terminal and a second insulating plate located between the positive output terminal and the negative output terminal to prevent creepage between the positive busbar and the negative busbar or the AC input terminal.

[0012] Optionally, the insulating device further comprises at least one support foot fixedly connected to the base, and the first insulating plate and the second insulating plate are respectively fixedly connected to the support foot or are integrally formed therewith.

[0013] Optionally, the support leg includes a transverse fixing structure fixedly connected to the base, a first vertical fixing structure connected to the first insulating plate, and a second vertical fixing structure connected to the second insulating plate; the first vertical fixing structure and the second vertical fixing structure extend from the transverse fixing structure to a side away from the base so that the first insulating plate and the second insulating plate are located on the top side of the rectifier.

[0014] Optionally, the frequency converter further includes three power busbars, and the number of the rectifiers is at least three, so that each of the power busbars corresponds to at least one of the rectifiers and is electrically connected to the AC input end of the corresponding rectifier.

[0015] Optionally, the three power busbars are distributed in sequence along the length direction of the positive busbar; and / or, all the rectifiers are distributed in sequence along the length direction of the positive busbar.

[0016] Optionally, the insulating device includes a plurality of the legs, and at least one of the plurality of legs is located between two adjacent rectifiers.

[0017] Optionally, the frequency converter further comprises a plurality of supporting members fixedly connected to the base, and each of the power busbars is respectively connected to at least one of the supporting members.

[0018] Optionally, at least a portion of the support member is a structure made of insulating material to insulate the power busbar from the base.

[0019] Optionally, the positive busbar and / or the negative busbar is a strip structure made of copper; and / or a cooling channel is provided in the base; and / or the inverter is suitable for an air conditioner.

[0020] The utility model provides an air conditioner in a second aspect, comprising the inverter described in any one of the first aspects.

[0021] Based on the foregoing description, those skilled in the art can understand that, in the aforementioned technical solution of the utility model, an insulating device fixedly connected to the base is provided, and the first insulating plate of the insulating device is located between the AC input terminal and the positive output terminal to separate the AC input terminal from the positive output terminal, thereby insulating the positive busbar from the AC input terminal. The second insulating plate of the insulating device is located between the positive output terminal and the negative output terminal to separate the positive output terminal from the negative output terminal, thereby insulating the positive busbar from the negative busbar. Therefore, the frequency converter of the utility model can prevent creepage between the positive busbar and the negative busbar or the AC input terminal, thereby ensuring the safety of equipment and personnel.

[0022] Furthermore, the insulating device and the base are fixedly connected by fixing the first insulating plate and the second insulating plate to the support legs or forming them as one piece, and the support legs are fixedly connected to the base.

[0023] Furthermore, by making the support leg include a transverse fixing structure fixedly connected to the base, a first vertical fixing structure connected to the first insulating plate, and a second vertical fixing structure connected to the second insulating plate, the first vertical fixing structure and the second vertical fixing structure extend from the transverse fixing structure to a side away from the base, so that the insulating device is U-shaped as a whole. By making the first insulating plate and the second insulating plate located on the top side of the rectifier, compared with making a part of the first insulating plate and the second insulating plate overlap with the rectifier, the material of the insulating device is reduced, and the production cost of the insulating device is reduced.

[0024] Furthermore, by making the frequency converter include three power busbars, the frequency converter can be directly connected to three-phase AC power through the three power busbars. By making each power busbar correspond to at least one rectifier and electrically connected to the AC input end of the corresponding rectifier, it is ensured that the AC power of each power busbar can be converted into DC power through the rectifier.

[0025] Furthermore, by distributing the three power busbars in sequence along the length direction of the positive busbar, all rectifiers are distributed in sequence along the length direction of the positive busbar, thereby facilitating the connection between the positive busbar and the negative busbar and each rectifier.

[0026] Furthermore, by making at least one of the multiple legs of the insulating device located between two adjacent rectifiers, the connection strength between the insulating device and the base is ensured while the structure of the frequency converter is made more compact.

[0027] Furthermore, by providing a plurality of support members fixedly connected to the base, and each power busbar is connected to at least one support member, the power busbar has more fixing points, thereby improving the structural strength of the power busbar.

[0028] Furthermore, by configuring at least a portion of the supporting member to be a structure made of insulating material, the power busbar is insulated from the base, thereby preventing leakage of electricity from the power busbar to the base, thereby ensuring safe use of the inverter.

[0029] Furthermore, by providing a cooling channel in the base, the base can be cooled when a refrigerant flows in the cooling channel, thereby cooling various components mounted on the base, thereby ensuring the operating temperature of the inverter.

[0030] Other beneficial effects of the present invention will be described in detail below in conjunction with the accompanying drawings so that those skilled in the art can more clearly understand the improved purposes, features and advantages of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solution of the utility model, some embodiments of the utility model will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that the same figure number indicates the same or similar parts or components in different drawings; the drawings of the utility model are not necessarily drawn to scale. In the drawings:

[0032] Figure 1 is a structural exploded view of some components of the frequency converter in some embodiments of the utility model (first axonometric perspective);

[0033] Figure 2 is a structural exploded view of some components of the frequency converter in some embodiments of the utility model (second axonometric perspective);

[0034] Figure 3 is an isometric view of a rectifier in some embodiments of the present invention;

[0035] Figure 4 is a first isometric view of an insulating device in some embodiments of the present invention;

[0036] Figure 5 is a second isometric view of the insulating device in some embodiments of the present invention;

[0037] Figure 6 is a first isometric view of some components of the frequency converter in some embodiments of the utility model;

[0038] Figure 7 is a second isometric view of some components of the frequency converter in some embodiments of the present utility model;

[0039] Figure 8 is a top view of some components of the frequency converter in some embodiments of the utility model;

[0040] Fig. 9 is a schematic diagram of a rectifier in some embodiments of the utility model;

[0041] Fig.10 is a schematic diagram of a rectifier in some other embodiments of the utility model;

[0042] Fig.11 It is a schematic block diagram of the air conditioner in the utility model. DETAILED DESCRIPTION

[0043] It should be understood by those skilled in the art that the embodiments described below are only a part of the embodiments of the present invention, rather than all the embodiments of the present invention, and the embodiments are intended to explain the technical principles of the present invention, rather than to limit the protection scope of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should still fall within the protection scope of the present invention.

[0044] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "top", "bottom", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0045] Furthermore, it should be noted that in the description of the present utility model, unless otherwise clearly specified and limited, the terms "install", "connect", and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances. For example, the terms "install", "connect", "connect" and "fix", unless otherwise specifically described, can specifically be any feasible connection form such as bolt connection, screw connection, welding, plug-in, riveting, melting, and clamping.

[0046] In addition, it should be noted that in the description of the present utility model, the terms "cold" and "heat" are two descriptions of the same physical state. That is, the higher the "cold" of a certain target object (such as an evaporator, air, condenser, etc.), the lower the "heat" it has, and the lower the "cold" it has, the higher the "heat" it has. A certain target object will release "heat" while absorbing "cold", and will absorb "heat" while releasing "cold". A certain target object stores "cold" or "heat" in order to keep the current temperature of the target object. "Refrigeration" and "heat absorption" are two descriptions of the same physical phenomenon, that is, a certain target object (such as an evaporator) will absorb heat while cooling.

[0047] Finally, it should be noted that in the description of the present invention, each functional module can be a physical module composed of multiple structures, components or electronic components, or a virtual module composed of multiple programs; each functional module can be a module that exists independently of each other, or a module divided according to the function of an integral module. It should be understood by those skilled in the art that, under the premise of being able to implement the technical solution described in the present invention, the composition, implementation and positional relationship of each functional module will not deviate from the technical principle of the present invention no matter how they change, and therefore should fall within the protection scope of the present invention.

[0048] Refer to the following Figures 1 to 10 The inverter 100 of the present invention is described by way of example. The inverter 100 of the present invention is applicable to an air conditioner.

[0049] It should be noted that, for the convenience of description and to enable those skilled in the art to quickly understand the technical solution of the present invention, the following text only describes the technical features that are strongly related (directly or indirectly related) to the technical problem and / or technical concept to be solved by the present invention, and does not describe the technical features that are weakly related to the technical problem and / or technical concept to be solved by the present invention. Since the technical features with a weaker degree of correlation belong to the common knowledge in the field, even if the present invention does not describe the features with a weaker degree of correlation, it will not lead to insufficient disclosure of the present invention.

[0050] For example, the frequency converter 100 generally includes components or parts such as a filter module, an inverter module, and a frequency control module, but because they are not related or not directly related to the technical problem to be solved by the present invention and are well known to those skilled in the art, the present invention will not elaborate on them.

[0051] like Figures 1 to 8As shown, in some embodiments of the present invention, the inverter 100 includes a base 110 , at least one rectifier 120 , a positive busbar 131 , a negative busbar 141 and an insulating device 150 .

[0052] The base 110 is provided with a fixing hole 111 , so as to fix at least one of the rectifier 120 , the positive busbar 131 , the negative busbar 141 and the insulating device 150 through the fixing hole 111 .

[0053] Furthermore, the fixing hole 111 is a threaded hole, so as to fix at least one of the rectifier 120 , the positive busbar 131 , the negative busbar 141 and the insulating device 150 to the base 110 by bolts.

[0054] Alternatively, those skilled in the art may also adopt any other feasible manner to fix at least one of the rectifier 120, the positive busbar 131, the negative busbar 141, and the insulating device 150 to the base 110. For example, a slot or a card slot is provided on the base 110, and a card connection structure is provided on the at least one item, so that the card connection structure is inserted into the slot or the card slot, thereby fixing the at least one item to the base 110.

[0055] The rectifier 120 is mounted on the base 110 and includes an AC input terminal 121, a positive output terminal 122 and a negative output terminal 123. The AC input terminal 121 is used to connect to an AC power source, the positive output terminal 122 is used to output a positive voltage, and the negative output terminal 123 is used to output a negative voltage.

[0056] It should be noted that, in the description of the present invention, the positive electrode and the negative electrode are relative, for example, the positive electrode voltage is relative to the negative electrode voltage, and the negative electrode voltage is relative to the positive electrode voltage.

[0057] The positive busbar 131 is connected to the positive output terminal 122 .

[0058] The negative busbar 141 is connected to the negative output terminal 123 .

[0059] Furthermore, the rectifier 120 is provided with threaded holes (not marked in the figure) at the AC input terminal 121 , the positive output terminal 122 and the negative output terminal 123 , respectively.

[0060] Correspondingly, a positive busbar mounting hole 1311 is provided on the positive busbar 131, so that the bolts pass through the positive busbar mounting hole 1311 and are tightened together with the threaded holes at the positive output terminal 122, thereby fixing the positive busbar 131 and the positive output terminal 122 together.

[0061] Correspondingly, a negative busbar mounting hole 1411 is provided on the negative busbar 141, so that a bolt passes through the negative busbar mounting hole 1411 and is tightened together with the threaded hole at the negative output terminal 123, thereby fixing the negative busbar 141 and the negative output terminal 123 together.

[0062] Among them, the insulating device 150 is fixedly connected to the base 110 and includes a first insulating plate 151 located between the AC input terminal 121 and the positive output terminal 122 and a second insulating plate 152 located between the positive output terminal 122 and the negative output terminal 123 to prevent creepage between the positive busbar 131 and the negative busbar 141 or the AC input terminal 121.

[0063] It can be understood by those skilled in the art that, in some embodiments of the present invention, an insulating device 150 fixedly connected to the base 110 is provided, and the first insulating plate 151 of the insulating device 150 is located between the AC input terminal 121 and the positive output terminal 122, so as to separate the AC input terminal 121 from the positive output terminal 122, thereby insulating the positive busbar 131 from the AC input terminal 121. The second insulating plate 152 of the insulating device 150 is located between the positive output terminal 122 and the negative output terminal 123, so as to separate the positive output terminal 122 from the negative output terminal 123, thereby insulating the positive busbar 131 from the negative busbar 141. Therefore, the inverter 100 of the present invention can prevent the creepage phenomenon between the positive busbar 131 and the negative busbar 141 or the AC input terminal 121, thereby ensuring the safety of equipment and personnel.

[0064] Furthermore, in the present invention, at least the first insulating plate 151 and the second insulating plate 152 of the insulating device 150 are made of insulating material, which may be insulating rubber, insulating plastic, glass, insulating ceramic, mica, asbestos, and the like.

[0065] like Figure 2 As shown, in some embodiments of the present invention, a cooling channel 112 is provided in the base 110, so that the base 110 can be cooled when a refrigerant (such as water, refrigerant in an air-conditioning refrigeration system, etc.) passes through the cooling channel 112, thereby cooling the various components installed on the base 110, thereby ensuring the operating temperature of the inverter 100.

[0066] For example, the cooling channel 112 can be connected in series to the refrigeration system of the air conditioner, specifically, connected in series between the outlet of the electronic expansion valve or the capillary tube and the inlet of the compressor.

[0067] like Figure 3As shown, in some embodiments of the present invention, a rectifier mounting hole 124 is provided on the rectifier 120 so that bolts pass through the rectifier mounting hole 124 and are tightened together with the fixing holes 111 on the base 110 , thereby fixing the rectifier 120 to the base 110 .

[0068] like Figure 4 and Figure 5 As shown, in some embodiments of the present invention, the insulating device 150 further includes at least one support leg 153 fixedly connected to the base 110 , and the first insulating plate 151 and the second insulating plate 152 are respectively fixedly connected to the support leg 153 or are integrally formed.

[0069] Specifically, the insulating device 150 further includes three legs 153 fixedly connected to the base 110 .

[0070] like Figure 6 and Figure 7 As shown, two of the three legs 153 are located between two adjacent rectifiers 120. Alternatively, those skilled in the art may also make one or all of the legs 153 located between two adjacent rectifiers 120 as required.

[0071] Those skilled in the art will appreciate that by positioning at least one of the plurality of legs 153 of the insulating device 150 between two adjacent rectifiers 120 , the structure of the inverter 100 is made more compact while ensuring the connection strength between the insulating device 150 and the base 110 .

[0072] In addition, in other embodiments of the present invention, those skilled in the art may also set the support legs 153 to any other feasible number as needed, for example, setting the support legs 153 to one, two, five, etc.

[0073] Those skilled in the art will appreciate that, in some embodiments of the present invention, the insulating device 150 is fixed to the base 110 by fixing the first insulating plate 151 and the second insulating plate 152 to the support legs 153 or making them integral with each other, and fixing the support legs 153 to the base 110.

[0074] Continue reading Figure 4 and Figure 5 The support leg 153 includes a transverse fixing structure 1531 fixedly connected to the base 110, a first vertical fixing structure 1532 connected to the first insulating plate 151, and a second vertical fixing structure 1533 connected to the second insulating plate 152. The first vertical fixing structure 1532 and the second vertical fixing structure 1533 extend from the transverse fixing structure 1531 to a side away from the base 110, so that the first insulating plate 151 and the second insulating plate 152 are located on the top side of the rectifier 120 (such as Figure 6 and Figure 7 shown).

[0075] The transverse fixing structure 1531 is provided with a support leg mounting hole 15311 , so that a bolt passes through the support leg mounting hole 15311 and is tightened with the fixing hole 111 on the base 110 , thereby fixing the support leg 153 to the base 110 .

[0076] In addition, those skilled in the art may also fix the support leg 153 to the base 110 in any feasible manner, such as welding, riveting, clamping, bonding, etc.

[0077] Those skilled in the art can understand that, in some embodiments of the present invention, by making the support leg 153 include a transverse fixing structure 1531 fixedly connected to the base 110, a first vertical fixing structure 1532 connected to the first insulating plate 151, and a second vertical fixing structure 1533 connected to the second insulating plate 152, the first vertical fixing structure 1532 and the second vertical fixing structure 1533 extend from the transverse fixing structure 1531 to a side away from the base 110, so that the insulating device 150 is U-shaped as a whole. By making the first insulating plate 151 and the second insulating plate 152 located on the top side of the rectifier 120, compared with making a part of the first insulating plate 151 and the second insulating plate 152 overlap with the rectifier 120, the material of the insulating device 150 is reduced, and the production cost of the insulating device 150 is reduced.

[0078] like Figure 1 , Figure 2 , Figures 6 to 8 As shown, in some embodiments of the present invention, the inverter 100 also includes three power busbars 160, and there are at least three rectifiers 120, so that each power busbar 160 corresponds to at least one rectifier 120 and is electrically connected to the AC input terminal 121 of the corresponding rectifier 120.

[0079] Among them, each power busbar 160 is respectively provided with a plurality of power busbar mounting holes 161, so that bolts can pass through the power busbar mounting holes 161 and be tightened with threaded holes at the AC input end 121 on the rectifier 120, thereby fixing the power busbar 160 to the rectifier 120.

[0080] Those skilled in the art can understand that, in some embodiments of the present invention, by making the inverter 100 include three power busbars 160, the inverter 100 can be directly connected to three-phase AC power through the three power busbars 160. By making each power busbar 160 correspond to at least one rectifier 120 and electrically connected to the AC input end 121 of the corresponding rectifier 120, it is ensured that the AC power of each power busbar 160 can be converted into DC power through the rectifier 120.

[0081] Continue reading Figure 1 , Figure 2 , Figures 6 to 8 In some embodiments of the present invention, each power bus 160 corresponds to two rectifiers 120, so as to use rectifiers 120 with smaller power and the least number to reduce costs while ensuring that each rectifier 120 is not overloaded.

[0082] It is understood by those skilled in the art that by making each power bus 160 correspond to two rectifiers 120, and also making two connection points between the power bus 160 and the rectifier 120, the connection strength of the power bus 160 is ensured. In addition, when one of the rectifiers 120 fails to work accidentally, the other rectifier 120 can continue to work, thereby ensuring the working performance of the inverter 100.

[0083] In addition, in other embodiments of the present invention, those skilled in the art can also make each power bus 160 correspond to any other feasible number of rectifiers 120, such as one, three, five, etc., as needed.

[0084] Furthermore, in some embodiments of the present invention, the rectification principle of each rectifier 120 can be as follows: Fig. 9 As shown, two diodes 125 are included. The connection relationship between the AC input terminal 121, the positive output terminal 122 and the negative output terminal 123 and the two diodes 125 is as follows: Fig. 9 shown.

[0085] In addition, in other embodiments of the present invention, those skilled in the art may also connect three power busbars 160 to one rectifier 120 at the same time as needed.

[0086] like Fig.10 As shown, in some other embodiments of the present invention, the rectifier 120 includes three AC input terminals 121, and the connection relationship between the AC input terminal 121, the positive output terminal 122 and the negative output terminal 123 and the two diodes 125 is as follows: Fig.10 shown.

[0087] from Fig. 9 and Fig.10 It can be seen that Fig.10 The rectifier 120 in some other embodiments shown is equivalent to Fig. 9 A set of three rectifiers 120 in some embodiments is shown.

[0088] like Figures 6 to 8 As shown, in some embodiments of the present invention, three power busbars 160 are distributed in sequence along the length direction of the positive busbar 131 ; and / or, all rectifiers 120 are distributed in sequence along the length direction of the positive busbar 131 .

[0089] In some embodiments of the utility model, by distributing the three power busbars 160 in sequence along the length direction of the positive busbar 131 , all the rectifiers 120 are distributed in sequence along the length direction of the positive busbar 131 , thereby facilitating the connection between the positive busbar 131 and the negative busbar 141 and each rectifier 120 .

[0090] like Figure 1 , Figure 2 , Figures 6 to 8 As shown, in some embodiments of the present invention, the inverter 100 further includes a plurality of supporting members 171 fixedly connected to the base 110 , and each power busbar 160 is respectively connected to at least one supporting member 171 .

[0091] Those skilled in the art will appreciate that by providing a plurality of support members 171 fixedly connected to the base 110 and connecting each power busbar 160 to at least one support member 171 , the power busbar 160 has more fixing points, thereby improving the structural strength of the power busbar 160 .

[0092] Specifically, each power busbar 160 is connected to a support member 171. A threaded column is provided at one end of each support member 171 close to the base 110, so that the threaded column is screwed into the fixing hole 111 on the base 110, thereby fixing the support member 171 to the base 110.

[0093] Furthermore, the inverter 100 further includes a power fixing bolt 172. At least one power busbar mounting hole 161 on the power busbar 160 corresponds to one power fixing bolt 172. A threaded hole is provided at the top of the support member 171, so that the power fixing bolt 172 passes through the power busbar mounting hole 161 on the power busbar 160 and is tightened with the threaded hole, thereby fixing the power busbar 160 and the support member 171 together.

[0094] Furthermore, the frequency converter 100 further includes a washer 173 disposed between the power fixing bolt 172 and the power busbar 160 . The washer 173 may be an elastic washer to ensure that the power fixing bolt 172 presses the power busbar 160 onto the supporting member 171 .

[0095] Furthermore, in some embodiments of the present invention, at least a portion of the support member 171 is a structure made of insulating material to insulate the power busbar 160 from the base 110 .

[0096] The insulating material may be any feasible material such as insulating plastic, glass, insulating ceramic, mica, asbestos, etc.

[0097] like Figure 1 , Figure 2 , Figures 6 to 8 As shown, in some embodiments of the present invention, the positive busbar 131 and / or the negative busbar 141 is a strip structure made of copper to facilitate the connection between the positive busbar 131 and / or the negative busbar 141 and the rectifier 120 .

[0098] from Figure 1 and Figure 2 As shown, the cross-sections of the positive busbar 131 and the negative busbar 141 are both L-shaped, so as to ensure that the positive busbar 131 and the negative busbar 141 have sufficient structural strength to prevent the positive busbar 131 and the negative busbar 141 from deforming during transportation and affecting installation. In addition, the L-shaped cross-section of the positive busbar 131 also facilitates its connection with the positive electrode transition member 132, and the L-shaped cross-section of the negative busbar 141 also facilitates its connection with the negative electrode transition member 142.

[0099] The positive busbar 131 and the positive transition member 132 , as well as the negative busbar 141 and the negative transition member 142 , may be connected together in any feasible manner, such as welding, riveting, bolting, crimping, etc.

[0100] The positive electrode transition component 132 and the negative electrode transition component 142 may be used to connect a filter module or a filter circuit.

[0101] In summary, in the technical solution described above in the utility model, the presence of the insulating device 150 can not only eliminate the creepage phenomenon, but also reduce the creepage distance between the positive busbar 131 and the negative busbar 141, so that the distance between the positive busbar 131 and the negative busbar 141 is smaller, and then under the same current carrying capacity, the positive busbar 131 and the negative busbar 141 can become wider and thinner. The increase in the width of the positive busbar 131 and the negative busbar 141 can better dissipate heat, thereby improving the efficiency of the inverter 100. In addition, the thinning of the thickness of the positive busbar 131 and the negative busbar 141 can make the plate material thereof thinner, reducing the cost.

[0102] Furthermore, the utility model also provides an air conditioner 001, the air conditioner 001 is as follows Fig.11 The inverter 100 shown in the figure includes any one of the above embodiments.

[0103] In the present invention, the air conditioner 001 can be a commercial air conditioner, a household air conditioner, a central air conditioner, a built-in air conditioner, a cabinet air conditioner, a wall-mounted air conditioner, an integrated air conditioner, a split air conditioner, etc.

[0104] So far, the technical solution of the utility model has been described in combination with the above multiple embodiments, but it is easy for those skilled in the art to understand that the protection scope of the utility model is not limited to these specific embodiments. Without departing from the technical principle of the utility model, those skilled in the art can split and combine the technical solutions in the above embodiments, and can also make equivalent changes or replacements to the relevant technical features. Any changes, equivalent replacements, improvements, etc. made within the technical concept and / or technical principle of the utility model will fall within the protection scope of the utility model.

Claims

1. A frequency converter, characterized in that: include: Pedestal; at least one rectifier, mounted on the base and comprising an AC input terminal, a positive output terminal and a negative output terminal; A positive busbar connected to the positive output terminal; A negative busbar connected to the negative output terminal; An insulating device is fixedly connected to the base and includes a first insulating plate located between the AC input terminal and the positive output terminal and a second insulating plate located between the positive output terminal and the negative output terminal to prevent creepage between the positive busbar and the negative busbar or the AC input terminal.

2. The frequency converter according to claim 1, characterized in that: The insulating device further comprises at least one foot fixedly connected to the base, The first insulating plate and the second insulating plate are respectively fixedly connected to the supporting legs or are made in one piece.

3. The frequency converter according to claim 2, characterized in that: The support leg comprises a transverse fixing structure fixedly connected to the base, a first vertical fixing structure connected to the first insulating plate, and a second vertical fixing structure connected to the second insulating plate; The first vertical fixing structure and the second vertical fixing structure extend from the lateral fixing structure to a side away from the base, so that the first insulating plate and the second insulating plate are located on a top side of the rectifier.

4. The frequency converter according to claim 2 or 3, characterized in that: The frequency converter also includes three power busbars. There are at least three rectifiers, so that each of the power busbars corresponds to at least one rectifier and is electrically connected to the AC input end of the corresponding rectifier.

5. The frequency converter according to claim 4, characterized in that: The three power busbars are sequentially distributed along the length direction of the positive busbar; and / or, All the rectifiers are distributed in sequence along the length direction of the positive busbar.

6. The frequency converter according to claim 4, characterized in that: The insulating device includes a plurality of legs, and at least one of the plurality of legs is located between two adjacent rectifiers.

7. The frequency converter according to claim 4, characterized in that: The frequency converter further comprises a plurality of supporting members fixedly connected to the base. Each of the power busbars is respectively connected to at least one of the supporting components.

8. The frequency converter according to claim 7, characterized in that: At least a portion of the support member is made of insulating material to insulate the power busbar from the base.

9. The frequency converter according to any one of claims 1 to 3, characterized in that: The positive busbar and / or the negative busbar are strip-shaped structures made of copper; and / or, A cooling channel is provided in the base; and / or, The frequency converter is suitable for an air conditioner.

10. An air conditioner, characterized in that: The invention comprises the frequency converter according to any one of claims 1 to 9.

Images