KR20190057964A - A vehicle inverter - Google Patents

Abstract

The present invention relates to a vehicle inverter capable of reducing the sizes of capacitors compared to a conventional capacitor cooling method. According to an embodiment of the present invention, the vehicle inverter comprises: a plurality of direct current (DC) capacitors arranged in a horizontal direction on one layer; a plurality of capacitor cases corresponding to each of the plurality of DC capacitors; and a curved pipe tightly attached to at least a part of the plurality of capacitor cases.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to a vehicle inverter. More specifically, the present invention relates to a cooling method of a DC capacitor which is a constitution of a vehicle inverter.

Inverter is a device that converts DC (Direct Current) voltage to AC (Alternating Current) voltage to smoothly supply vehicle voltage to electric appliances. In general, since a battery provided in a vehicle provides a DC voltage and most household appliances are driven by receiving an AC voltage, a vehicle inverter is required to use household electric appliances using the battery of the vehicle.

2. Description of the Related Art In recent years, various technologies have been developed to reduce the size and weight of an inverter applied to a vehicle. Particularly, in developing an inverter, it is an important task to realize a heat dissipation structure of various internal parts to secure durability.

DC capacitors, which directly affect the durability of the inverter, are temperature and durability. Therefore, the temperature of the DC capacitor is controlled by using the air-cooled or water-cooled cooling system. do.

In the inverter adopting the indirect cooling method of the DC capacitor according to the related art, a DC capacitor is mounted in the inverter casing, and a cooling device is provided on the opposite side of the casing in which the DC capacitor is mounted. A natural air cooling system or a cooling water circulation system is used as the cooling system.

In the prior art, the capacitor has a structure in which the capacitor is in close contact with the casing for cooling the DC capacitor. However, the size of the casing of the inverter is increased as a whole. For example, since the power module and the DC capacitors are stacked and seated in the casing in a stacked package manner in order to cool the power module and the DC capacitor at the same time, the cooling flow path of the casing must secure an area exceeding the cross sectional area of the power module and the DC capacitor The size of the casing is inevitably increased.

In addition, a plastic resin material is applied to the case of the DC capacitor for electrical insulation. Such a material has a problem that the cooling effect is hindered due to the high thermal resistance due to the low thermal conductivity. The lower the cooling effect, the lower the durability of the DC capacitor and the factor that reduces the life of the inverter.

Also, in the case of the indirect cooling method, since the allowable range temperature margin at the time of energization is smaller than that of the direct cooling method, the temperature margin must be designed to be high, and the total size of the inverter is also increased.

In order to solve the above problems, it is an object of the present invention to provide a vehicle inverter including a DC capacitor, a capacitor case, a pipe, a cooling plate, and a heat transfer part.

It is also an object of the present invention to provide a vehicle inverter using a more efficient inverter cooling method by suggesting various combinations of DC capacitors, capacitor cases, pipes, cooling plates, and heat transfer parts.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a plasma display panel comprising: a plurality of direct current (DC) capacitors arranged in a horizontal direction on a single layer; A plurality of capacitor cases respectively corresponding to the plurality of DC capacitors; And a bent pipe that is in close contact with the plurality of capacitor case partial regions.

Further, in the embodiment of the present invention, the vehicle inverter further includes a through hole passing through the capacitor case, and the pipe is closely attached to the through hole.

Further, in the embodiment of the present invention, the vehicle inverter further includes a cooling plate closely attached to the pipe.

Further, in an embodiment of the present invention, the pipe further includes a condensation surface on which the working fluid evaporates and a condensation surface on which the working fluid condenses, and the cooling plate is provided in close contact with the condensation surface of the pipe .

Further, in the embodiment of the present invention, the condensing surface has a structure in which the end portion is bent, and the cooling plate is provided so as to fit the shape of the condensed surface on which the end portion is bent.

Further, in the embodiment of the present invention, the pipe may include a first pipe provided in close contact with the inside of the through hole in a direction parallel to the through hole, and a first pipe connected to the first pipe orthogonally, And a second pipe connected to the second pipe.

Further, in the embodiment of the present invention, the first pipe and the second pipe are alternately connected.

Further, in the embodiment of the present invention, the second pipe is connected to one end of three or more first pipes in a communicable manner at a predetermined interval.

Embodiments of the present invention also include a plurality of DC capacitors arranged horizontally in one layer; A cooling plate which forms a flow path of the cooling water and surrounds the side and the bottom of the plurality of DC capacitors; And a heat transfer portion of a metallic material which is in close contact with the DC capacitor and transfers the heat of the DC capacitor to the cooling plate inside the cooling plate.

Further, in the embodiment of the present invention, the heat transfer portion is provided in a space in which the lower portion of the DC capacitor contacts the cooling plate, or a space in which the plurality of DC capacitors are in contact with each other.

The details of other embodiments are included in the detailed description and drawings.

According to an embodiment of the present invention, there is one or more of the following effects.

First, since the pipe includes the pipe closely attached to the through hole passing through the inside of the DC capacitor, there is an effect of reducing the size of the capacitor compared to the conventional method of cooling the capacitor.

Secondly, since a heat dissipation mechanism such as a pipe is used without using the mold surface of the capacitor, the thermal resistance can be minimized and the cooling efficiency of the vehicle inverter can be increased accordingly.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

1 is a view showing an appearance of a vehicle according to an embodiment of the present invention.
2 is a block diagram referenced for describing a vehicle according to an embodiment of the present invention.
3 is a block diagram referred to describe a vehicle inverter according to an embodiment of the present invention.
4 shows a DC capacitor which is a constitution of a vehicle inverter according to an embodiment of the present invention.
5 shows a structure in which a DC capacitor and a pipe, which are a constitution of a vehicle inverter according to an embodiment of the present invention, are combined.
6 is a view for explaining the operation principle of a pipe which is a constitution of a vehicle inverter according to an embodiment of the present invention.
FIG. 7 shows a structure in which a DC capacitor, a pipe and a cooling plate are combined, which is a constitution of a vehicle inverter according to an embodiment of the present invention.
FIGS. 8 to 9 show temperature analysis of a structure in which a DC capacitor and a pipe, which is a constitution of a vehicle inverter according to an embodiment of the present invention, are combined.
FIGS. 10 to 11 show a structure in which a DC capacitor and a pipe, which are a constitution of a vehicle inverter according to an embodiment of the present invention, are combined.
FIG. 12 shows a structure in which a DC capacitor and a pipe, which are a constitution of a vehicle inverter according to an embodiment of the present invention, are combined.
FIG. 13 shows a structure in which a DC capacitor and a cooling plate are combined, which is a constitution of a vehicle inverter according to an embodiment of the present invention.
FIG. 14 shows a structure in which a DC capacitor, a cooling plate, and an electrothermal unit are combined as one configuration of a vehicle inverter according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used to designate identical or similar elements, and redundant description thereof will be omitted. The suffix " module " and " part " for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , ≪ / RTI > equivalents, and alternatives.

Terms including ordinals such as first, second, etc. may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

The vehicle described herein may be a concept including a car, a motorcycle. Hereinafter, the vehicle will be described mainly with respect to the vehicle.

The vehicle described in the present specification may be a concept including both an internal combustion engine vehicle having an engine as a power source, a hybrid vehicle having an engine and an electric motor as a power source, and an electric vehicle having an electric motor as a power source.

In the following description, the left side of the vehicle means the left side in the running direction of the vehicle, and the right side of the vehicle means the right side in the running direction of the vehicle.

1 is a view showing an appearance of a vehicle according to an embodiment of the present invention.

2 is a block diagram referenced for describing a vehicle according to an embodiment of the present invention.

1 and 2, an overall length is a length from the front portion to a rear portion of the vehicle 100, a width of the vehicle 100, a width of the vehicle 100, and a height, Length. In the following description, it is assumed that the total length direction L is a direction in which the full length direction of the vehicle 100 is measured, the full width direction W is a reference for the full width measurement of the vehicle 100, Which is a reference for the measurement of the height of the object 100.

2, the vehicle 100 includes a control section 170, a power supply section 190, a user interface device 200, an object detection device 300, a communication device 400, a driving operation device 500 ), A vehicle drive system (600), and a travel system (700).

According to the embodiment, the vehicle 100 may further include other components than the components described herein, or may not include some of the components described. The control unit 170 can control the overall operation of each unit in the vehicle 100. [ The control unit 170 may be called an ECU (Electronic Control Unit).

One or more processors and controls 170 included in vehicle 100 may be implemented as application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs) field programmable gate arrays, processors, controllers, micro-controllers, microprocessors, and other electrical units for performing other functions.

The power supply unit 190 may supply power required for operation of each component under the control of the controller 170. Particularly, the power supply unit 190 can receive power from a battery or the like inside the vehicle.

The user interface device 200 is a device for communicating between the vehicle 100 and a user. The user interface device 200 may receive user input and provide information generated by the vehicle 100 to the user. The vehicle 100 can implement UI (User Interfaces) or UX (User Experience) through the user interface device 200. [

The object detecting apparatus 300 is an apparatus for detecting an object located outside the vehicle 100. [ The object detecting apparatus 300 can generate object information based on the sensing data.

The object information may include information on the presence or absence of the object, position information of the object, distance information between the vehicle 100 and the object, and relative speed information between the vehicle 100 and the object.

The object may be various objects related to the operation of the vehicle 100.

The communication device 400 is a device for performing communication with an external device. Here, the external device may be another vehicle, a mobile terminal, or a server.

The communication device 400 may include at least one of a transmission antenna, a reception antenna, an RF (Radio Frequency) circuit capable of implementing various communication protocols, and an RF device to perform communication.

The driving operation device 500 is a device for receiving a user input for operation. The vehicle 100 can be operated based on the signal provided by the driving operation device 500. [

The vehicle driving device 600 is an apparatus for electrically controlling the driving of various devices in the vehicle 100. [ The vehicle driving apparatus 600 includes a power train driving unit 610, a chassis driving unit 620, a door / window driving unit 630, a safety driving unit 640, a lamp driving unit 650 and an air conditioning driving unit 660 .

According to the embodiment, the vehicle drive system 600 may further include other elements other than the described elements, or may not include some of the elements described.

On the other hand, the vehicle drive apparatus 600 may include a processor. Each unit of the vehicle drive apparatus 600 may individually include a processor.

The power train driving unit 610 can control the operation of the power train apparatus.

The chassis driving unit 620 can control the operation of the chassis apparatus.

The door / window driving unit 630 may perform electronic control of a door apparatus or a window apparatus in the vehicle 100.

The safety device driving unit 640 can perform electronic control of various safety apparatuses in the vehicle 100. [

The lamp driving unit 650 can perform electronic control of various lamp apparatuses in the vehicle 100. [

The air conditioning driving unit 660 can perform electronic control on the air conditioner in the vehicle 100. [ For example, when the temperature inside the vehicle is high, the air conditioning driving unit 660 can control the air conditioner to operate so that the cool air is supplied to the inside of the vehicle.

The vehicle drive apparatus 600 may include a processor. Each unit of the vehicle drive apparatus 600 may individually include a processor. The vehicle drive apparatus 600 can be operated under the control of the control section 170. [

The operating system 700 is a system for controlling various operations of the vehicle 100. [ The travel system 700 can be operated in the autonomous mode.

The vehicle inverter 800 is a device for converting a DC voltage into an AC voltage and is intended to smoothly supply the voltage of the vehicle 100 to the electric appliance. Since a battery provided in the vehicle 100 provides a DC voltage and most household appliances are driven to receive an AC voltage, a vehicle inverter is required to use a household electric appliance using the battery of the vehicle.

The vehicle inverter 800 may be connected to the power supply unit 190 and may be controlled by the controller 170. Alternatively, the control unit 170 may be controlled separately from the power supply unit 190. The vehicle inverter 800 according to the embodiment of the present invention will be described below in detail with reference to FIG.

3 is a block diagram referred to describe a vehicle inverter according to an embodiment of the present invention.

The vehicle inverter 800 according to the embodiment of the present invention includes a DC capacitor 810, a capacitor case 820, a pipe 830, a cooling plate 840, and a heat transfer unit 850.

An example of the DC capacitor 810 of the inverter 800 for a vehicle according to an embodiment of the present invention may be a DC-Link capacitor. The DC capacitor 810 operates as a buffer between the power source supplied from the power supply unit 190 and the vehicle inverter 800. [

The capacitor case 820 of the inverter 800 for a vehicle according to the embodiment of the present invention serves to seat the DC capacitor 810. When a plurality of DC capacitors 810 are provided, a plurality of capacitor cases 820 corresponding to the plurality of DC capacitors 810 may be provided.

One example of the pipe 830 of the inverter 800 for a vehicle according to the embodiment of the present invention may be a heat pipe. The pipe 830 serves to dissipate the heat generated from the DC capacitor 810 as heat transfer medium to the outside. The operation principle of the pipe 830 according to the embodiment of the present invention will be described in detail later with reference to FIG. 5 to FIG.

The cooling plate 840 of the inverter 800 for a vehicle according to the embodiment of the present invention forms a flow path of cooling water. The cooling plate 840 may be in the form of being in close contact with the pipe 830 or surrounding the side and bottom of the DC capacitor 810.

The heat transfer portion 850 of the inverter 800 for a vehicle according to an embodiment of the present invention may be formed of a metal having a high heat transfer rate such as aluminum (Al), copper (Cu), or the like. The heat transfer portion 850 is closely attached to the DC capacitor 810 inside the cooling plate surrounding the side surface and the lower portion of the DC capacitor 810 to transfer the heat of the DC capacitor 810 to the cooling plate 840.

4 shows a DC capacitor which is a constitution of a vehicle inverter according to an embodiment of the present invention.

The capacitors can be classified into bulk capacitors, bypass capacitors, and de-coupling capacitors depending on the application.

In general, bulk capacitors are used to prevent the power supply output from significantly dropping during periods when no current is available. A bypass capacitor is used to resonate at a specific frequency and to pass the noise component of that frequency to ground or to flow only a specific frequency component to the next block. The decoupling capacitor is used for blocking the DC power supply and transmitting only the signal components in the coupling of the plurality of stages having different DC characteristics.

One example of a DC capacitor 810 according to an embodiment of the present invention may be a bulk capacitor.

Referring to FIG. 4 (a), each of the DC capacitors 810 may be arranged horizontally in one layer. Although each of the DC capacitors 810 is shown as being arranged in a single horizontal direction in FIG. 4A, it is also within the scope of the present invention that the DC capacitors 810 are extended in a plurality of horizontal directions.

4 (b), the DC capacitor 810 may further include a through hole 815 passing through the capacitor case 820. In addition, The inside of the through hole 815 is defined as the core 816 of the DC capacitor 810. The pipe 830 may be closely attached to the through hole 815. The structure in which the pipe 830 is closely attached to the through hole 815 will be described in detail below.

5 shows a structure in which a DC capacitor and a pipe, which are a constitution of a vehicle inverter according to an embodiment of the present invention, are combined.

The vehicle inverter according to the embodiment of the present invention includes a plurality of DC capacitors 810 arranged horizontally in one layer, a plurality of capacitor cases 820 and a plurality of capacitor cases 820 respectively corresponding to the plurality of DC capacitors, And may include a bent-shaped pipe 830 which is in close contact with a certain area.

The cooling method of the vehicle inverter according to the embodiment of the present invention utilizes the principle that the heat of the DC capacitor 810 is discharged to the outside as the working fluid evaporates inside the pipe 830 due to the heat of the DC capacitor 810.

As shown in FIG. 5, the pipe 830 penetrates the through-hole 815 of the DC capacitor 810 and may be provided in close contact with the DC capacitor 810. 5, the pipe 830 may include a vaporizing surface 835 where the working fluid evaporates and a condensing surface 836 where the working fluid condenses.

Since the pipe 830 of the inverter 800 for a vehicle according to the embodiment of the present invention shown in FIG. 5 is closely attached to the through hole 815 passing through the inside of the DC capacitor 810, It is advantageous in reducing the size. Further, since the heat dissipation mechanism such as the pipe 830 is used without using the mold surface of the capacitor, there is an advantage that the thermal resistance can be minimized.

The operation principle of the pipe 830 based on the coupling structure of the DC capacitor and the pipe shown in Fig. 5 will now be described in detail in Fig.

6 is a view for explaining the operation principle of a pipe which is a constitution of a vehicle inverter according to an embodiment of the present invention.

The pipe 830 according to an embodiment of the present invention is composed of a casing, a wick, a vapor cavity, and a working fluid. The vessel is a passage through which the working fluid moves, and the inside is in a vacuum state. The wick is a porous metal structure attached to the inside of the container. It can be a groove type, a mesh type, a sintered type, and the like.

The heat circulation process inside the pipe 830 will be described.

First, the working fluid in the evaporation surface 835 of the pipe 830 evaporates and absorbs the heat of the core 816 of the DC capacitor 810 (1), endothermic heat at a high temperature. As described above, since the inside of the pipe 830 is in a vacuum state, the pressure is very low, so that the working fluid can easily be evaporated (vaporized). Next, the vaporized working fluid moves to condensation surface 836 by natural convection (). Next, the vaporized working fluid condenses on the condensation surface 836 and releases heat (③, low-temperature heat dissipation). Finally, the working fluid condensed (liquefied) by gravity or surface tension, which is the driving force of the thermocycling process, moves again to the evaporation surface 835 (4).

The heat transfer rate according to the pipe diameter and length of the pipe 830 and the operating temperature range for each working fluid will be described.

The performance of the pipe 830 can be expressed by the heat transfer rate. The heat transfer coefficient according to the pipe diameter and the length of the pipe 830 is shown in Table 1 below. Generally, the calorific value of a DC capacitor is known as 108.3 W. Therefore, the pipe 830 according to the embodiment of the present invention may be provided with a pipe having a diameter of 6.4 mm.

Table 2 shows the operating temperature range according to the working fluid. An appropriate working fluid can be selected in consideration of the internal temperature of the core 816 of the DC capacitor 810 according to an embodiment of the present invention.

Diameter [mm] Length [mm] Heat transfer rate [W] 6.4 15.2 300 30.5 175 45.7 150 9.5 15.2 500 30.5 375 45.7 350 12.7
15.2 700 30.5 575 45.7 550

Working fluid Operating temperature range [℃] Helium -271 to -268 Hydrogen -259 ~ -240 Neon -248 ~ -230 Nitrogen -210 ~ -150 Methane -182 to -82 Ammonia -78 to -130 Water 5 ~ 230 Mercury 200 to 500 Cesium 400 to 1000

FIG. 7 shows a structure in which a DC capacitor, a pipe and a cooling plate are combined, which is a constitution of a vehicle inverter according to an embodiment of the present invention.

The vehicle inverter 800 according to the embodiment of the present invention may further include a DC capacitor 810, a pipe 830 as well as a cooling plate 840. The cooling plate 840 forms a flow path of the cooling water 845.

The cooling plate 840 according to an embodiment of the present invention may be provided in close contact with the condensation surface 836 of the pipe 830. 6, the working fluid inside the pipe 830 is evaporated due to the heat generated at the core 816 of the DC capacitor 810, and condensed at the condensing surface 836. As shown in FIG.

Accordingly, the lower the temperature of the condensing surface 836, the higher the efficiency of heat circulation, i.e., the thermal conductivity. The cooling plate 840 according to the embodiment of the present invention has the effect of increasing the cooling efficiency of the DC capacitor 810 by forming the flow path of the cooling water 845 and being provided in close contact with the condensation surface 836.

Next, the cooling plate 840 according to the embodiment of the present invention and the portion 846 where the condensation surface 836 of the pipe 830 is closely contacted will be described.

Referring to portion 846 of FIG. 7, the condensing surface 836 of the pipe 830 may have a structure in which the ends are bent. In addition, the cooling plate 840 may be provided to conform to the shape of the condensed surface 836 of which the ends are bent. As described above, since the working fluid condenses at the condensing surface 836, the larger the cross-sectional area of the cooling plate 840 in contact with the condensing surface 836, the higher the heat transfer rate.

As described above, the cooling plate 840 of the inverter 800 for a vehicle according to the embodiment of the present invention is provided so as to fit the shape of the curved condensation surface 836, so that the sectional area contacting the condensation surface 836 is widened, So that a high heat transfer rate can be secured.

Meanwhile, the cooling plate 840 according to the embodiment of the present invention may have various shapes as well as shapes provided in close contact with the condensation surface 836 as shown in FIG. This will be described in detail below with reference to FIG. 13 to FIG.

FIGS. 8 to 9 show temperature analysis of a structure in which a DC capacitor and a pipe, which is a constitution of a vehicle inverter according to an embodiment of the present invention, are combined. More specifically, the cooling efficiency of the vehicle inverter according to the embodiment of the present invention will be described with reference to FIGS. 8 to 9. FIG.

Fig. 8 is a view showing an analysis condition, and Fig. 9 is a diagram showing an analysis result.

8 (a) shows a capacitor model without a pipe 830, and FIG. 8 (b) shows a capacitor model with a pipe 830, respectively.

The equivalent heat transfer coefficient of the core 816 of the DC capacitor 810 is 0.45 W / mk, the amount of heat generated by the core 816 of the DC capacitor 810 is 1.925 W, The condition is set at 105 deg.

The capacitor case 820 is made of polyphenylene sulfide (PPS). PPS materials are high-heat-resistant, high-strength polymers that replace metals in automobiles, electronics, and machinery.

A thermal pad of 1 mm is formed on the bottom surface of the DC capacitor 810 and the surface where the pipe 830 contacts the through hole 815 of the DC capacitor 810 and the surface of the pipe 830 and the cooling plate 840 On the contact surface.

The cooling water 845 in the cooling plate 840 is set to a mixed liquid of 50% ethylene glycol and 50% water. The cooling water 845 is introduced at 10 LPM (liter per minute), and the cooling water inlet temperature is set at 65 ° C.

Fig. 9 shows an analysis result according to the above-described analysis condition of Fig. Like FIG. 8, FIG. 9A is a perspective view and a side view of a capacitor model without a pipe 830, and FIG. 9B is a perspective view and a side view of a capacitor model with a pipe 830, respectively.

In the case of the capacitor model without the pipe 830 as shown in FIG. 9A, the maximum temperature of 102.1 DEG C between the core 816 and the core 816 is measured. 9 (b), the highest temperature 93.4 占 폚 is measured at the edge of the DC capacitor 810, and 89.4 占 폚 is measured between the core 816 and the core 816.

That is, it can be seen from FIG. 9A and FIG. 9B that the capacitor model with the pipe 830 can lower the maximum temperature by 8.7 ° C. than the capacitor model without the pipe 830.

The inverter 800 for a vehicle according to the embodiment of the present invention includes a pipe 830 which is in close contact with the through hole 815 of the DC capacitor 810 so that the heat of the core 816 of the DC capacitor 810 can be more efficiently So that it has a technical effect of radiating heat.

FIGS. 10 to 11 show a structure in which a DC capacitor and a pipe, which are a constitution of a vehicle inverter according to an embodiment of the present invention, are combined.

10, the pipe 830 of the inverter 800 for a vehicle according to the embodiment of the present invention includes a first pipe 835 and a second pipe 835 which are closely attached to the inside of the through hole in a direction parallel to the through hole 815, 1 pipe 835 and a second pipe 836 connected to the outside of the capacitor case 820.

Further, as shown in FIG. 10, the first pipe 835 and the second pipe 836 may be connected in series and alternately. The cooling water can flow through the flow path formed by connecting the plurality of first pipes 835 and the plurality of second pipes 836. Accordingly, the pipe 830 of the inverter 800 for a vehicle according to the embodiment of the present invention may further include a cooling water inlet 837 through which cooling water flows and a cooling water outlet 838 through which cooling water is discharged.

Referring to FIG. 11, the second pipe 836 may be connected to one end of three or more first pipes 835 at a predetermined interval so as to be able to communicate with each other. That is, although the first pipe 835 and the second pipe 836 are connected in series in FIG. 10, it can be understood that the first pipe 835 and the second pipe 836 are connected in parallel in FIG.

11, the cooling water can flow through the flow path formed by connecting the plurality of first pipes 835 and the plurality of second pipes 836. As shown in FIG. Accordingly, the pipe 830 of the inverter 800 for a vehicle according to the embodiment of the present invention may further include a cooling water inlet 837 through which cooling water flows and a cooling water outlet 838 through which cooling water is discharged.

FIG. 12 shows a structure in which a DC capacitor and a pipe, which are a constitution of a vehicle inverter according to an embodiment of the present invention, are combined.

12 (a) is a perspective view of a structure in which a DC capacitor and a pipe are coupled, and FIG. 12 (b) is a plan view of the structure of FIG.

10 to 11, the first pipe 835 is configured to penetrate the core 816 of the DC capacitor 810 in common.

12 (a), both the first pipe 835 and the second pipe 835 do not penetrate the core of the DC capacitor 810 but are connected to a portion of the capacitor case 820 of the DC capacitor 810 As shown in FIG. Through the structure shown in FIG. 12 (a), the pipe 830 cools between the molds for packaging the plurality of DC capacitors 810.

Applying the coupling structure of the DC capacitor 810 and the pipe 830 shown in FIG. 12A can provide a technical effect of increasing the cooling efficiency without modifying the existing capacitor structure as much as possible.

12 (a), the cooling water can flow through the flow path formed by connecting the plurality of first pipes 835 and the plurality of second pipes 836. As shown in FIG. Accordingly, the pipe 830 of the inverter 800 for a vehicle according to the embodiment of the present invention may further include a cooling water inlet 837 through which cooling water flows and a cooling water outlet 838 through which cooling water is discharged.

The cooling method of the DC capacitor using the pipe has been described with reference to FIGS. 5 to 12. 13 to 14, a method of cooling a DC capacitor using a cooling plate without using a pipe will be described.

FIG. 13 shows a structure in which a DC capacitor and a cooling plate are combined, which is a constitution of a vehicle inverter according to an embodiment of the present invention.

The cooling plate 840 of the inverter 800 for a vehicle according to the embodiment of the present invention may further include a bath 847 for accommodating a plurality of DC capacitors 810. In FIG. 13, the bath 847 is shown to accommodate four DC capacitors 810, but the scope of the present invention is not limited thereto.

As described above with reference to Figs. 5 to 12, a channel of the cooling water 845 is formed in the cooling plate 840, and the cooling water 845 flows. The heat generated from the DC capacitor 810 through the cooling water 845 is dissipated.

The vehicle inverter 800 according to the embodiment of the present invention shown in FIG. 13 reduces the engagement space of the plurality of DC capacitors 810 and reduces the thermal resistance between the plastic housing and the cooling plate 840 to improve the cooling performance .

FIG. 14 shows a structure in which a DC capacitor, a cooling plate, and an electrothermal unit are combined as one configuration of a vehicle inverter according to an embodiment of the present invention.

The vehicle inverter 800 according to the embodiment of the present invention includes a plurality of DC capacitors 810 arranged horizontally in a single layer and a plurality of DC capacitors 810 forming a flow path of the cooling water 845, And a heat transfer unit 850 made of a metal material which closely contacts the DC capacitor 810 inside the cooling plate 840 and transfers the heat of the DC capacitor 810 to the cooling plate 840. [ . ≪ / RTI >

14A is a view showing a heat transfer portion 850 and FIG. 14B is a view showing a structure in which a DC capacitor 810, a cooling plate 840 and a heat transfer portion 850 are combined.

14A and 14B, the heat transfer portion 850 of the inverter 800 for a vehicle according to the embodiment of the present invention is formed in a space in which the lower portion of the DC capacitor 810 and the cooling plate 840 are in contact with each other, A plurality of DC capacitors 810 may be provided in a space in contact with each other.

The heat transfer portion 850 may be made of a metal having a high heat transmission rate such as aluminum (Al), copper (Cu), or the like. The heat transfer portion 850 is in close contact with the DC capacitor 810 and transfers the heat of the DC capacitor 810 to the cooling plate 840 in the bath 847 surrounding the side and the bottom of the DC capacitor 810 It plays a role.

The present invention described above can be embodied as computer-readable codes on a medium on which a program is recorded. The computer readable medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of the computer readable medium include a hard disk drive (HDD), a solid state disk (SSD), a silicon disk drive (SDD), a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, , And may also be implemented in the form of a carrier wave (e.g., transmission over the Internet). In addition, the computer may include a processor or a control unit. Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

100: vehicle

Claims (10)

A plurality of direct current (DC) capacitors arranged horizontally in one layer;
A plurality of capacitor cases respectively corresponding to the plurality of DC capacitors; And
A flexible pipe that is in close contact with the plurality of capacitor case partial regions;
. The method according to claim 1,
And a through hole penetrating the capacitor case,
And the pipe is provided in close contact with the through hole. 3. The method of claim 2,
Further comprising a cooling plate that is in close contact with the pipe. The method of claim 3,
The pipe further comprising a condensing surface on which the working fluid and the evaporating surface on which the working fluid evaporate,
Wherein the cooling plate is provided in close contact with a condensed surface of the pipe. 5. The method of claim 4,
Wherein the condensing surface has a structure in which the end portion is bent, and the cooling plate is provided so as to match the shape of the condensed surface on which the end portion is bent. 3. The method of claim 2,
The pipe
A first pipe provided in close contact with the inside of the through hole in a direction parallel to the through hole,
Further comprising a second pipe connected to the first pipe orthogonally and provided outside the capacitor case. The method according to claim 6,
And the first pipe and the second pipe are alternately connected to each other. The method according to claim 6,
And the second pipe includes:
And is connected to one end of three or more first pipes at a predetermined interval in a communicable manner. A plurality of DC capacitors arranged horizontally in one layer;
A cooling plate which forms a flow path of the cooling water and surrounds the side and the bottom of the plurality of DC capacitors; And
A heat transfer unit of a metal material, which is in close contact with the DC capacitor and transfers the heat of the DC capacitor to the cooling plate in the cooling plate;
. 10. The method of claim 9,
The heat-
Wherein a space in which the lower portion of the DC capacitor is in contact with the cooling plate or a space in which the plurality of DC capacitors are in contact with each other is provided.

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