Inductor device for a vehicle

Abstract

An inductor device for a vehicle includes an inductor boosting element configured to boost an input voltage. An inductor tank has an insertion recess configured to receive the inductor boosting element inserted therein. An inductor cover is configured to close the inductor tank. A coolant tank is provided on a lower surface of the inductor tank. The coolant tank has a coolant passage formed therein. A coolant cover is configured to close the coolant tank.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is based on and claims priority from Korean Patent Application No. 10-2014-0152949, filed on November 5, 2014, with the Korean Intellectual Property Office, the disclosure of which is hereby incorporated by reference in its entirety. TECHNICAL FIELD

[0002] The present disclosure relates to an inductor device for a vehicle, and more particularly to an inductor device for a vehicle having improved cooling efficiency by integrating an inductor case and a cooling case or improving a coolant channel. BACKGROUND

[0003] A plug-in hybrid vehicle, which combines the advantages of a hybrid vehicle and an electric vehicle, has recently been developed. Such a plug-in hybrid vehicle requires a higher voltage than a conventional hybrid vehicle to power a motor.

[0004] This means that the plug-in hybrid vehicle includes a high-voltage battery that supplies voltage to drive the motor, a low-voltage battery that supplies a low voltage of 12 V used for electronic components, a hybrid power control unit (HPCU), a motor MG1 for driving the vehicle, a generator MG2 for starting / stopping, and a motor.

[0005] Among the above components, the HPCU includes a cover that protects internal parts, an inductor that boosts an input voltage, a power converter module that converts a direct current (DC) voltage into a 3-phase alternating current (AC) voltage, a capacitor for smoothing an input current, a high-voltage connector that is an interface for supplying an AC output voltage to the motor, and a housing that provides a mounting interface for an internal part and protects the parts.

[0006] Since the inductor of the HPCU is a main heat element of the HPCU and its performance is affected by cooling, in accordance with the prior art, the inductor is indirectly cooled while being attached to a heat radiating plate after applying grease to the heat radiating plate.

[0007] The inductor enhances cooling by increasing adhesion with the heat dissipation plate using grease. However, if the grease disappears after a predetermined period of time, the adhesion between the inductor and the heat dissipation plate weakens. As a result, cooling of the inductor by the heat dissipation plate may be significantly reduced, and inductor performance degradation may occur. SUMMARY OF THE INVENTION

[0008] The present disclosure has been made to solve the above-mentioned problems encountered in the prior art while maintaining advantages achieved by the prior art.

[0009] One aspect of the present disclosure provides an inductor device for a vehicle capable of maintaining adhesion by integrating an inductor tank and a coolant tank, and accordingly preventing degradation of the inductor, in certain embodiments.

[0010] An aspect of the present disclosure also provides an inductor device for a vehicle capable of increasing a cooling efficiency of an inductor and, in certain embodiments, preventing performance degradation by forming coolant channels in an inductor tank and a coolant tank such that coolant passes through the coolant channels in a zigzag shape and accordingly increases a residence time of the coolant.

[0011] In accordance with an exemplary embodiment of the present invention, an inductor device for a vehicle includes an inductor boosting element configured to boost an input voltage. An inductor tank has an insertion recess configured to receive the inductor boosting element inserted therein. An inductor cover is configured to close or cover the inductor tank. A coolant tank is provided on a lower surface of the inductor tank. The coolant tank has a coolant passage formed therein. A coolant cover is configured to close or cover the coolant tank. In certain embodiments, the inductor tank and the coolant tank may be integrally formed.

[0012] In certain embodiments, a first direction may be from the coolant reservoir toward the inductor reservoir, and the coolant passage may be formed perpendicular to the first direction.

[0013] In certain embodiments, the lower surface of the inductor container may be provided with a coolant receiving recess connected to the coolant passage.

[0014] In certain embodiments, the inductor reinforcement member may include a primary and a secondary coil portion, and a bottom surface of the insertion recess may be provided with a central support portion inserted between the primary and secondary coil portions and a lateral support portion supporting an outer side surface of the primary or secondary coil portion.

[0015] In certain embodiments, lower sides of the central and side support members may be provided with coolant introduction recesses connected to the coolant receiving recess.

[0016] In certain embodiments, the coolant cover may be provided with a central guide part configured to be inserted into the coolant introduction groove of the central support part, and a lateral guide part configured to be inserted into the coolant introduction groove of the lateral support part. In certain embodiments, the central or lateral guide part may be configured to reduce a width of the coolant introduction groove and increase cooling by rapidly circulating the coolant due to an increase in the flow velocity of the coolant since the width of the coolant introduction groove is reduced.

[0017] In certain embodiments, the central and lateral guide portions may be integrally formed on the coolant cover.

[0018] In accordance with another exemplary embodiment of the present invention, an inductor device for a vehicle includes an inductor boosting element configured to boost an input voltage. An inductor tank has an upper surface having an insertion recess configured to receive the inductor boosting element inserted therein, and a lower surface having a coolant receiving recess thereon. An inductor cover is configured to be placed over the insertion recess and to close the inductor tank. A coolant tank is formed on the lower surface of the inductor tank. The coolant tank has first and second coolant spaces formed therein, which are separated by a partition member and a partition wall, respectively. The first and second coolant spaces are each connected to the coolant receiving recess of the inductor tank.The coolant reservoir has coolant passages in which coolant is regulated through the first coolant space, the coolant receiving recess, and the second coolant space.

[0019] In certain embodiments, the coolant passages may include a coolant supply passage that supplies coolant to the first coolant space from outside the inductor device, a first coolant communication passage that leads the coolant from the first coolant space to the coolant receiving recess, a second coolant communication passage that leads the coolant from the coolant receiving recess to the second coolant space, and a coolant discharge passage that discharges the coolant from the second coolant space to the outside of the inductor device.

[0020] In certain embodiments, the coolant supply passage may be a coolant supply hole formed in one side of the coolant tank and connected to the first coolant space.

[0021] In certain embodiments, the coolant tank may have an upper surface connected to the inductor tank, and the first coolant communication passage may be a first coolant communication hole formed in one side of the upper surface of the coolant tank and connecting the first coolant space to the coolant receiving recess.

[0022] In certain embodiments, the second coolant communication passage may be a second coolant communication hole formed in another side of the upper surface of the coolant tank and connecting the second coolant space with the coolant receiving recess.

[0023] In certain embodiments, the coolant discharge passage may be a coolant discharge hole formed in one side of the coolant tank and connecting the second coolant space to the outside of the inductor device.

[0024] In certain embodiments, the first coolant chamber may have a coolant channel formed therein.

[0025] In certain embodiments, the inductor tank and the coolant tank may be integrally formed.

[0026] In certain embodiments, the inductor reinforcement member may include a primary and a secondary coil portion, and a bottom surface of the insertion recess may be provided with a central support portion inserted between the primary and secondary coil portions and a lateral support portion supporting an outer side surface of the primary or secondary coil portion.

[0027] In certain embodiments, lower sides of the central and side support members may be provided with coolant introduction recesses connected to the coolant receiving recess. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and other objects, features and advantages of embodiments of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings.

[0029] Fig. 1 is an exploded perspective view showing an inductor device in accordance with a first exemplary embodiment of the present invention.

[0030] Fig. 2 is a sectional view of Fig. 1.

[0031] Fig. 3 is a bottom perspective view of an inductor case in accordance with the first embodiment of the present invention.

[0032] Fig. 4 is an exploded perspective view of an inductor device from below in accordance with a second exemplary embodiment of the present invention.

[0033] Fig. 5 is an assembled front perspective view of the inductor device in accordance with the second exemplary embodiment of the present invention.

[0034] Fig. 6 is a sectional view of the Fig. 4. DETAILED DESCRIPTION

[0035] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that they can be easily implemented by those skilled in the art to which the present invention pertains. However, the present invention can be implemented in a variety of different ways and is not limited to the exemplary embodiments described in the specification. In the accompanying drawings, portions unrelated to the description are omitted in order to more clearly describe the present invention, and like reference numerals are used to describe similar portions throughout the present specification.

[0036] An inductor device for a vehicle in accordance with the present disclosure may, in certain embodiments, increase cooling efficiency by integrating an inductor housing in which an inductor reinforcement member is inserted or embedded in certain embodiments, and a cooling housing that cools the inductor reinforcement member or forms cooling channels in a zigzag shape.

[0037] Hereinafter, an inductor device for a vehicle in accordance with exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0038] Inductor device for a vehicle in accordance with a first exemplary embodiment

[0039] An inductor device 100for a vehicle in accordance with a first exemplary embodiment of the present invention includes an inductor amplifying element 110 which amplifies or increases an input voltage, and an inductor housing which has an upper side into which the inductor amplifying element 110 and has a lower side in which coolant passages are formed, as shown in the Fig. 1 to Fig. 3 shown.

[0040] The inductor amplification element 110 In accordance with certain embodiments of the present invention, to supply power, boosts a high voltage of 300 V or more to 800 V to 1200 V or reduces a high voltage of 300 V to 12 V and closes a primary coil part 111 which receives a lower voltage, and a secondary coil part 112which converts the low voltage to the high voltage and outputs it. In certain embodiments, the inductor amplification element includes: a temperature sensor 113 that detects a temperature, an epoxy casting 114 , which contains the primary and secondary coil parts 111 and 112 attaches and protects a signal connector 115 , which is a temperature sensor 113 outputs a recorded temperature signal and / or a connection 116 which connects the signal 115 and an external output port not shown.

[0041] In certain embodiments, the primary and secondary coil parts 111 and 112 inserted on the left and right to an upper surface of the inductor housing or embedded in certain embodiments.

[0042] The inductor housing in accordance with certain embodiments of the present invention includes the inductor container 120 , into which the inductor reinforcement element 110 is inserted, and the coolant housing 130 through which coolant is used to cool the inductor reinforcement element 110 where the inductor container 120 is formed at an upper portion of the inductor housing and the coolant tank 130 formed at a lower portion of the inductor housing.

[0043] In certain embodiments, an insertion recess 120a , into which the inductor reinforcement element 110 is introduced, with an upper surface of the inductor container 120 formed and the insertion recess 120a is through the inductor cover 121 sealed. The inductor container thus protects 120 the inductor amplification element 110in front of the outside, while the inductor reinforcement element 110 absorbs into itself.

[0044] The coolant tank 130 is at a lower surface of the inductor container 120 provided and, in certain embodiments, has a lower portion defined by the coolant cover 131 is closed, allowing coolant passage 130a which is designed to protect the coolant tank 130 in a front-to-rear direction. In certain embodiments, the coolant cools at the coolant reservoir 130 the inductor container 120 while passing through the coolant passage 130a from front to back, and the inductor reinforcement element 110 is cooled by the inductor tank 120 indirectly cooled. In certain embodiments, the front-to-rear direction is the direction from the coolant reservoir 130to the inductor tank 120 perpendicular.

[0045] Here, in accordance with an embodiment of the present invention, the inductor housing comprises the inductor container 120 and the coolant housing 130 which in certain embodiments are integrally formed, thereby enabling adhesion or contact between the inductor container 120 and the cooling container 130 to increase and that in the inductor container 120 introduced inductor amplification element 110 through the coolant tank 130 easy to cool. Since the inductor container 120 and the coolant tank 130 integrally formed, manufacturing and assembly can be carried out more easily and consequently costs can be reduced.

[0046] In certain embodiments, a coolant receiving recess 120bwhich is connected to the coolant passage 130a connected, in the bottom of the inductor container 120 formed and a part of the coolant passing through the coolant passage 130a passes through, is inserted into the coolant receiving recess 120b introduced, which allows the cooling of the 120a introduced inductor amplification element 110 This means that cooling efficiency or cooling capacity can be increased because the area exposed to the coolant is increased.

[0047] In certain embodiments, the insertion recess 120 provided with a support member which supports lower portions of the primary and secondary coil parts 111 and 112 in a form surrounding the lower sections. The support part is located at the center of a lower surface of the insertion recess 120aand includes a central support part 120c , which connects the primary and secondary coil parts 111 and 112 supported while inserted between them and a lateral or side support part 120d which, at a left end or a right end of the lower surface of the insertion recess 120a and a side surface of the primary or secondary coil part 111 or 112 supports.

[0048] In certain embodiments, the central support part 120c designed as an equilateral triangular shape so that it contains the primary and secondary coil parts 111 and 112 in one the side surfaces of the lower sections of the primary and secondary coil parts 111 and 112 surrounding form, and the side support part 120dis designed as a right-angled triangular shape so that it covers the side surface of the primary or secondary coil part 111 or 112 in a the side surface of the lower section of the primary or secondary coil part 111 or 112 surrounding form.

[0049] Since the central support part 120c and the side support part 120d the primary or secondary coil part 111 or 112 in which the lower section of the primary or secondary coil part 111 or 112 surrounding form, the central support part can 120c and the side support part 120d in certain embodiments, the primary or secondary coil part 111 or 112 provide constant protection.

[0050] In certain embodiments, coolant introduction recesses 120e which is connected to the coolant intake recess 120bare connected in the lower surfaces of the central and lateral support part 120c and 120d formed, and a part of the coolant that enters the coolant receiving recess 120b is inserted into the coolant introduction recesses 120e introduced, which allows the cooling of the 120a introduced inductor amplification element 110 This means that cooling efficiency can be increased because the area exposed to the coolant is increased.

[0051] Meanwhile, in certain embodiments, the coolant cover 131 with a central guide part 131a which extends so that it fits into the coolant introduction recess 120e of the central support part 120c can be inserted, and a lateral guide part 131b provided which extends so that it fits into the coolant introduction recess 120eof the side support part 120d can be inserted.

[0052] Since the width of the coolant introduction recess 120e is reduced, the central guide part increases 131a and the lateral guide part 131b In certain embodiments, the flow rate of the coolant discharged from the coolant receiving recess 120b is introduced, which allows to increase the cooling efficiency by rapid circulation of the coolant due to the increase in the flow velocity of the coolant.

[0053] In certain embodiments, the central guide part 131a and the lateral guide part 131b integral to the coolant cover 131 which makes manufacturing and assembly easy, simplifies a structure and reduces costs.

[0054] In certain embodiments, the central guide part 131aand the lateral guide part 131b also removable on the coolant cover 131 be designed, whereby the central guide part 131a and the lateral guide part 131b , which have different shapes, on the coolant cover 131 so that they are replaceable and maintenance is easy to carry out, and especially in the case where the central guide part 131a and the lateral guide part 131b made by plastic casting, weight can be reduced and the shape can be changed.

[0055] Therefore, the inductor device 100 for the vehicle in accordance with the first exemplary embodiment of the present invention having the configuration described above, in certain embodiments, the inductor container 120 and the coolant tank 130which are integrally formed, thereby making it possible to achieve consistent adhesion or contact and increase cooling efficiency.

[0056] Inductor device for a vehicle in accordance with a second exemplary embodiment

[0057] An inductor device 200 for a vehicle in accordance with a second exemplary embodiment of the present invention includes an inductor amplifying element 210 that amplifies an input voltage, an inductor container 220 , in which the inductor reinforcement element 210 is inserted, and a coolant tank 230 which is in the inductor container 220 introduced inductor amplification element 210 , as in the Fig. 4 to Fig. 6 shown, cools.

[0058] Referring to Fig. 5 closes the inductor amplification element 210in certain embodiments, a primary coil part 211 which receives a low voltage and a secondary coil part 212 , which converts the low voltage into a high voltage and outputs it. In certain embodiments, the inductor amplifying element 210 also have the following: a temperature sensor 213 that detects a temperature, an epoxy casting 214 , which contains the primary and secondary coil parts 211 and 212 attaches and protects a signal connector 215 , which is a temperature sensor 213 outputs a recorded temperature signal and / or a connection 216 which connects the signal 215 and an external output port not shown.

[0059] An insertion recess 220a , which has introduced into it the inductor reinforcement element 210 and by an inductor cover212 is closed, is at an upper surface of the inductor container 220 formed and a coolant receiving recess 220b is on a lower surface of the inductor container 220 trained.

[0060] In certain embodiments, the insertion recess 220 provided with a support member which supports lower portions of the primary and secondary coil parts 211 and 212 in a form surrounding the lower sections. The support part is located at the center of a lower surface of the insertion recess 220a and includes a central support part 220c , which contains the primary and secondary trace part 211 and 212 supported while inserted between them and a lateral support part 220d which, at a left end or a right end of the lower surface of the insertion recess 220aand a lateral surface of the primary or secondary coil part 211 or 212 supports.

[0061] In certain embodiments, the central support part 220c formed as an equilateral triangular shape, so that it contains the primary and secondary trace parts 211 and 212 in a shape surrounding the lateral surfaces at the lower sections of the primary and secondary coil parts 211 and 212 supported, and the lateral support part 220d is designed as a right-angled triangular shape so that it can be the primary or secondary coil part 211 or 212 in a shape surrounding the lateral surface at the lower portion of the primary or secondary coil part 211 or 212 This means that the inductor amplification element 210 durable due to the central support part 220c and the side support part 220dcan be supported.

[0062] In certain embodiments, coolant introduction recesses 220e which is connected to the coolant intake recess 220b are connected in the lower surfaces of the central and lateral support part 220c and 220d formed, and a part of the coolant receiving recess 220b introduced coolant is inserted into the coolant introduction recess 220e introduced, which allows the cooling of the 220a introduced inductor amplification element 210 This means that the cooling efficiency can be increased because the coolant introduction recesses 220e increase the area exposed to the coolant.

[0063] In certain embodiments, the coolant tank 230 with a first and second coolant chamber 230a and 230bprovided on the lower surface of the inductor tank 220 are formed by a separating element or partition wall 231 are divided into sections and each with the coolant intake recess 220b This means that the coolant tank 230 coolant channels in which the coolant passes through the first coolant chamber 230a , the coolant intake recess 220b and the second coolant chamber 230b goes through.

[0064] In certain embodiments, the coolant channels comprise the coolant channels including a coolant supply passage 232 , which corresponds to the first coolant chamber 230a supplies the coolant from the outside, a first coolant connection passage 233 which carries the coolant from the first coolant chamber 230a to the coolant intake recess 220b leads to a second coolant connection passage 234which carries the coolant from the coolant receiving recess 220b to the second coolant chamber 230b and a coolant discharge passage 235 which carries the coolant from the second coolant chamber 230b to the outside.

[0065] In certain embodiments, the coolant supply passage 232 in an outer side of the coolant tank 230 and is designed as a coolant supply hole connected to the first coolant space 230a which allows external coolant to reach the first coolant chamber more quickly 230a is supplied.

[0066] In certain embodiments, the first coolant connection passage 233 in one side of an upper surface of the coolant tank 230 and is formed as a first coolant communication hole which connects the first coolant space 230a and the coolant intake recess 220bconnects, whereby the coolant of the coolant receiving recess 220b is supplied more quickly.

[0067] In certain embodiments, the second coolant connection passage 234 in the other side of the upper surface of the coolant tank 230 and is formed as a second coolant communication hole which defines the second coolant space 230b and the coolant intake recess 220b connects, whereby the coolant is supplied to the second coolant chamber 230b is supplied more quickly.

[0068] In certain embodiments, the coolant discharge passage 235 in a rear surface of the coolant tank 220 and is formed as a coolant discharge hole connecting the second coolant space and the outside, thereby discharging the coolant to the outside more quickly.

[0069] In certain embodiments, the first coolant connection passage 233 and the second coolant connection passage 234 in both corners in a diagonal direction on the upper surface of the coolant tank 230 which increases the coolant residence time and cooling efficiency.

[0070] In certain embodiments, a plurality of coolant channels 236 in the first coolant chamber 230a designed so that the coolant flows zigzag through the coolant channels 236 and the multitude of coolant channels 236 adhesion or contact with the coolant, thereby increasing cooling efficiency.

[0071] In certain embodiments, the inductor housing 220 and the coolant housing 230be integrally formed, thereby enabling easier manufacturing and assembly and reducing costs.

[0072] Since the inductor device for the vehicle according to the second exemplary embodiment of the present invention having the above-described configuration has the coolant channels formed in the zigzag shape, the cooling efficiency of the inductor reinforcing member can be increased.

[0073] According to the exemplary embodiments of the present invention, as described above, the following advantages can be achieved.

[0074] First, in certain embodiments, the inductor tank and the coolant tank are integrally formed, thereby enabling adhesion between the inductor tank and the coolant tank to be maintained and increasing cooling efficiency, and in particular enabling costs to be reduced through high manufacturing and assembly efficiency.

[0075] Second, in certain embodiments, the coolant channels in the inductor tank and the coolant tank are formed so that the coolant passes through the coolant channels in the zigzag shape, thereby making it possible to increase the cooling efficiency.

[0076] It is to be understood that the scope of the present invention is defined by the following claims rather than the detailed description given above, and all modifications or changes that can be derived from the meaning, scope and equivalents of the claims are included within the scope of the present invention. List of reference symbols 100, 200 inductor device or induction device 110, 210 Inductor reinforcement element 111, 211 primary coil part 112, 212 secondary coil part 113, 213 Temperature sensor 114, 214 Epoxy casting 115, 215 signal connectors 116, 216 connection 120, 220 inductor containers 120a, 220a insertion recess or groove 120b, 220b Coolant receiving recess or groove 120c, 220c central support part 120d, 220d side support part 120e, 220e coolant inlet recess or groove 121, 221 Inductor cover 130, 230 coolant tank 130a coolant passage 131 Coolant cover 131a, 231a central guide part 131b, 231b side guide part 230a first coolant chamber 231 Partition element or partition wall 232 Coolant supply passage 233 first coolant connection passage 234 second coolant connection passage 235 Coolant discharge passage 236 coolant channels QUOTES CONTAINED IN THE DESCRIPTION

[0077] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0078] KR 10-2014-0152949

[0001]

Claims

[1] Inductor device for a vehicle, the inductor device comprising: an inductor amplification element configured to amplify an input voltage; an inductor container having an insertion recess configured to receive the inductor reinforcement element inserted therein; an inductor cover configured to cover the inductor container; a coolant tank provided on a lower surface of the inductor tank, a coolant passage being formed in the coolant tank; and a coolant cover configured to cover the coolant reservoir. [2] The inductor device according to claim 1, wherein a first direction is from the coolant tank toward the inductor tank, and wherein the coolant passage is formed perpendicular to the first direction. [3] The inductor device according to claim 1, wherein the inductor tank and the coolant tank are integrally formed. [4] The inductor device according to claim 1, wherein the lower surface of the inductor tank is provided with a coolant receiving recess connected to the coolant passage. [5] Inductor device according to claim 4, wherein the inductor reinforcement element has a primary and a secondary coil part, and a bottom of the insertion recess is provided with a central support part inserted between the primary and secondary coil parts and a lateral support part supporting an outer side surface of the primary or secondary coil part. [6] The inductor device according to claim 5, wherein lower sides of the central and side support members are provided with coolant introduction recesses connected to the coolant receiving recess. [7] The inductor device according to claim 6, wherein the coolant cover is provided with a central guide part configured to be inserted into the coolant introduction groove of the central support part and a lateral guide part configured to be inserted into the coolant introduction groove of the lateral support part, and the central or lateral guide part is configured to reduce a width of the coolant introduction groove and to increase cooling by rapid circulation of the coolant due to an increase in the flow velocity of the coolant since the width of the coolant introduction groove is reduced. [8] An inductor device according to claim 7, wherein the central and lateral guide portions are integrally formed on the coolant cover. [9] Inductor device for a vehicle, the inductor device comprising: an inductor amplification element configured to amplify an input voltage; an inductor container having an upper surface with an insertion recess configured to receive the inductor reinforcement member inserted therein, and a lower surface having a coolant receiving recess thereon; an inductor cover configured to be placed over the insertion recess and to cover the inductor container; and a coolant tank formed on the lower surface of the inductor tank, the coolant tank having therein first and second coolant spaces separated by a partition member, the first and second coolant spaces each communicating with the coolant receiving recess of the inductor tank, and the coolant tank having coolant passages in which coolant is circulated through the first coolant space, the coolant receiving recess, and the second coolant space. [10] The inductor device according to claim 9, wherein the coolant passages include a coolant supply passage that supplies the coolant to the first coolant space from outside the inductor device, a first coolant communication passage that leads the coolant from the first coolant space to the coolant receiving recess, a second coolant communication passage that leads the coolant from the coolant receiving recess to the second coolant space, and a coolant discharge passage that discharges coolant from the second coolant space to the outside of the inductor device. [11] The inductor device according to claim 10, wherein the coolant supply passage is a coolant supply hole formed in one side of the coolant tank and connected to the first coolant space. [12] The inductor device according to claim 10, wherein the coolant tank has an upper surface connected to the inductor tank, and the first coolant communication passage is a first coolant communication hole formed in one side of the upper surface of the coolant tank and connecting the first coolant space to the coolant receiving recess. [13] The inductor device according to claim 10, wherein the second coolant communication passage is a second coolant communication hole formed in another side of the upper surface of the coolant tank and communicating the second coolant space with the coolant receiving recess. [14] The inductor device according to claim 10, wherein the coolant discharge passage is a coolant discharge hole formed in one side of the coolant tank and connecting the second coolant space to the outside of the inductor device. [15] Inductor device according to claim 10, wherein the first coolant space has a coolant channel formed therein. [16] Inductor device according to claim 10, wherein the inductor housing and the coolant housing are integrally formed. [17] The inductor device according to claim 10, wherein the inductor reinforcement member comprises a primary and a secondary coil part, and a bottom surface of the insertion recess is provided with a central support part inserted between the primary and secondary coil parts and a lateral support part supporting an outer side surface of the primary or secondary coil part. [18] The inductor device according to claim 17, wherein lower sides of the central and side support members are provided with coolant introduction recesses connected to the coolant receiving recess.