EP4731459A1 - Vehicular heat source unit - Google Patents

Abstract

To provide a vehicular heat source unit that can be reliably secured to a vehicle. A vehicular heat source unit (17) that can be disposed in a vehicle front compartment (BR) of a vehicle (11) includes an elongated structure (18) of an elongated shape provided with the hot water device (30a) inside which hot water flows. The elongated structure (18) includes a supporting portion (70a) configured to support the hot water device (30a), and a first securing portion (56) and a second securing portion (66) that are disposed on both ends of the supporting portion (70a). The first securing portion (56) and the second securing portion (66) can be respectively secured to a right rigid portion (50) and a left rigid portion (60) of the vehicle (11).

Description

[DESCRIPTION]

[Title of Invention]

VEHICULAR HEAT SOURCE UNIT

[Technical Field] [0001]

The present invention relates to a vehicular heat source unit, which is a heat source of hot water for heating air in a vehicle cabin. [Background Art] [0002]

A vehicle is provided with an air conditioner, which has heating and cooling functions, for example, such that air in a vehicle cabin can be conditioned. PTL 1 discloses an example of related art concerning the air conditioner. [0003]

The air conditioner disclosed in PTL 1 includes an air heating heat exchanger capable of heating air blown into the vehicle cabin. The air heating heat exchanger performs heat exchange between the air blown into the vehicle cabin and hot water as a heat medium.

[0004]

A hot water circuit where hot water flows includes: a hot water pump for delivering hot water; a refrigerant condenser for performing heat exchange between the hot water and a refrigerant; and a hot water heater capable of further heating the hot water that has been heated by the refrigerant condenser .

[Citation List]

[Patent Literature]

[0005]

[PTL 1]

JP2022-184446A

[Summary of Invention]

[Technical Problem]

[0006]

When the hot water pump, the refrigerant condenser, and the hot water heater are mounted in the vehicle, it is considered to unitize the hot water pump, the refrigerant condenser, and the hot water heater, for example, as a heat source unit configured to be a heat source of the hot water. However, PTL 1 does not disclose an arrangement and a securing method of the heat source unit relative to the vehicle, so that a specific mounting method to the vehicle has been demanded.

[0007]

It is an object of the invention to provide a vehicular heat source unit that can be reliably secured to a vehicle. [Solution to Problem] [0008]

According to a first aspect, there is provided a vehicular heat source unit (17, 17A, 17B) that can be disposed inside a vehicle front compartment (BR) in front of a vehicle cabin (CR) where passengers board in a vehicle (11) , the vehicular heat source unit (17, 17A, 17B) including : a hot water device (30a) including at least one of the following: a hot water pump (31) configured to deliver hot water capable of heating air blown into the vehicle cabin (CR) ; a refrigerant condenser (22) configured to perform heat exchange between the hot water and a refrigerant capable of cooling the air blown into the vehicle cabin (CR) ; a hot water heater (32) capable of further heating the hot water that has been heated by the refrigerant condenser (22) ; or a hot water liquid tank (34) configured to store part of the hot water and separate air bubbles from the hot water; and an elongated structure (18, 120, 210) of an elongated shape provided with the hot water device (30a) , the elongated structure (18, 120, 210) including: a supporting portion (70a, 120a, 210a) configured to support the hot water device (30a) ; a first securing portion (56, 130) that is disposed on an end of the supporting portion (70a, 120a, 210a) on one side with respect to a longitudinal direction of the elongated structure (18, 120, 210) as a reference and that can be secured to a right rigid portion

(50) of the vehicle (11) ; and a second securing portion (66 140) disposed on an end of the supporting portion (70a, 120a, 210a) on an opposite side with respect to the longitudinal direction of the elongated structure (18, 120, 210) as a reference and that can be secured to a left rigid portion (60) of the vehicle (11) . [0009]

According to a second aspect, preferably, in the vehicular heat source unit (17, 17A, 17B) according to the first aspect, the first securing portion (56, 130) can be secured to a right front side panel (52) of the right rigid portion ( 50 ) , and the second securing portion (66, 140) can be secured to a left front side panel (62) of the left rigid portion (60) . [0010]

According to a third aspect, preferably, in the vehicular heat source unit (17, 17A, 17B) according to the first or second aspect, the first securing portion (56, 130) can be secured to a right suspension tower (53) of the right rigid portion ( 50 ) , and the second securing portion (66, 140) can be secured to a left suspension tower (63) of the left rigid portion

(60) . [0011]

According to a fourth aspect, preferably, in the vehicular heat source unit (17, 17A, 17B) according to any one of the first to third aspects, the elongated structure (18, 120, 210) includes a dash panel securing portion (76) that can be secured to a dash panel (12) of the vehicle (11) between the second securing portion (66, 140) and the first securing portion (56, 130) . [0012]

According to a fifth aspect, preferably, in the vehicular heat source unit (17, 17A, 17B) according to any one of the first to fourth aspects, the hot water pump (31) , the refrigerant condenser (22) , the hot water heater (32) , and the hot water liquid tank (34) are supported to the elongated structure (18, 120, 210) .

[0013]

According to a sixth aspect, preferably, the vehicular heat source unit (17, 17A, 17B) according to any one of the first to fifth aspects includes a refrigerant liquid tank (27) configured to store part of the refrigerant and to separate the refrigerant in a gaseous state from the refrigerant in a liquid state, the refrigerant liquid tank (27) being supported by the elongated structure (18, 120, 210) . [0014]

According to a seventh aspect, preferably, the vehicular heat source unit (17, 17A, 17B) according to any one of the first to sixth aspects is capable of cooling a battery (49) configured to store traveling power of the vehicle (11) by cold water cooled by the refrigerant, the vehicular heat source unit (17, 17A, 17B) including: a cold water pump (41) configured to deliver the cold water; a cold-water cooling expansion device (24) capable of expanding the refrigerant; and a cold-water cooling heat exchanger (26) configured to perform heat exchange between the refrigerant that has been expanded by the cold-water cooling expansion device (24) and the cold water, in which the cold water pump (41) , the cold-water cooling expansion device (24) , and the cold-water cooling heat exchanger (26) are supported by the elongated structure (18, 120, 210) .

[0015]

According to an eighth aspect, preferably, in the vehicular heat source unit (17, 17A, 17B) according to any one of the first to seventh aspects, the first securing portion (56, 130) has a plate shape and includes a first overlapping portion (57a, 131) that can overlap the right rigid portion (50) , and a first base portion (57c, 132) configured to couple the first overlapping portion (57a, 131) and the supporting portion (70a, 120a, 210a) to each other, the first base portion (57c, 132) is bent toward the first overlapping portion (57a, 131) , the second securing portion (66, 140) has a plate shape and includes a second overlapping portion (67a, 141) that can overlap the left rigid portion (60) , and a second base portion (67c, 142) configured to couple the second overlapping portion (67a, 141) and the supporting portion (70a, 120a, 210a) to each other, and the second base portion (67c, 142) is bent toward the second overlapping portion (67a, 141) .

[Advantageous Effects of Invention] [0016]

The invention can provide the vehicular heat source unit that can be reliably secured to the vehicle.

[Brief Description of Drawings] [0017] [FIG. 1]

FIG. 1 is a schematic diagram illustrating a vehicular thermal management system including a vehicular heat source unit in a first example.

[FIG. 2] FIG. 2 is a perspective view of a vehicle in which the vehicular thermal management system in FIG. 1 can be mounted. [FIG. 3]

FIG. 3 is a perspective view of a supporting portion of an elongated structure of the vehicular heat source unit in FIG. 1, and devices supported by the supporting portion. [FIG. 4]

FIG. 4 is a perspective view of the supporting portion of the elongated structure and a cover member that can be hung from the supporting portion. [FIG. 5]

FIG. 5A is a plan view of the vehicular heat source unit secured to the vehicle. FIG. 5B is a diagram illustrating an arrangement of a compressor relative to the vehicular heat source unit. [FIG. 6]

FIG. 6A is a view of the vehicular heat source unit as viewed from the rear. FIG. 6B is a view of the vehicular heat source unit as viewed from the left. [FIG. 7]

FIG. 7 is an exploded perspective view of a vehicular heat source unit according to a second example. [FIG. 8]

FIG. 8 is a view of the vehicular heat source unit according to the second example as viewed from the front. [FIG. 9]

FIG. 9 is a diagram partially illustrating a vehicular heat source unit according to a third example.

[Description of Embodiments]

[0018]

<First Example>

A first example will be described with reference to the accompanying drawings. It is noted that left and right refer to left and right (vehicle width directions) with respect to a passenger in a vehicle, and front and rear refer to front and rear with respect to a traveling direction of the vehicle. In the drawings, Fr indicates the front, Rr indicates the rear, Le indicates the left as viewed from a passenger, Ri indicates the right as viewed from a passenger, Up indicates upward, and Dn indicates downward.

[0019]

(Vehicular Thermal Management System)

Refer to FIGs. 1 and 2. In a vehicle 11, it is possible to mount a vehicular thermal management system 10 capable of air-conditioning a vehicle cabin CR where passengers can board, and cooling a battery 49 configured to store traveling power of the vehicle 11. For convenience of description, as for the vehicle 11 in FIG. 2, only a vehicle body Ila configured to be a framework in the vehicle 11 is illustrated [0020] The vehicular thermal management system 10 includes : a refrigerant circuit 20 where a refrigerant capable of cooling air in the vehicle cabin CR flows ; a hot water circuit 30 where hot water capable of heating air in the vehicle cabin CR flows ; and a cold water circuit 40 where cold water capable of cooling the battery 49 flows . [ 0021 ] (Refrigerant Circuit )

The refrigerant circuit 20 is provided with a compressor 21 configured to compress the refrigerant to a high temperature and a high pressure , and a refrigerant condenser 22 configured to perform heat exchange between the high-temperature and high-pressure refrigerant and the hot water . The refrigerant condenser 22 is occasionally referred to as water condenser . The refrigerant that has passed through the refrigerant condenser 22 branches into two flows . [ 0022 ]

One of the branch refrigerant flows runs into a ref rigerant-f or-air expansion device 23 capable of expanding the refrigerant . The refrigerant that has been expanded by the ref rigerant-f or-air expansion device 23 runs into an air cooling heat exchanger 25 so as to cool air passing through the air cooling heat exchanger 25 . The air that has been cooled by the air cooling heat exchanger 25 is supplied into the vehicle cabin CR as cold air for cooling . The air cooling heat exchanger 25 is occasionally referred to as evaporator .

[ 0023 ]

The other of the branch refrigerant flows runs into a cold-water cooling expansion device 24 capable of expanding the refrigerant . The refrigerant that has been expanded by the cold-water cooling expansion device 24 runs into a cold- water cooling heat exchanger 26 capable of cooling cold water by heat exchange between the cold water and the refrigerant . The cold-water cooling heat exchanger 26 is occasionally referred to as chiller .

[ 0024 ]

The refrigerant that has passed through the air cooling heat exchanger 25 and the refrigerant that has passed through the cold-water cooling heat exchanger 26 j oin each other and are thereafter sucked by the compressor 21 .

[ 0025 ]

It is noted that the refrigerant circuit 20 is provided with a refrigerant liquid tank 27 configured to store part of the refrigerant and to separate the refrigerant in a liquid state and the refrigerant in a gaseous state from each other . The refrigerant in this example flows out of the refrigerant condenser 22 once , and passes through the refrigerant liquid tank 27 , and only the liquid refrigerant flows into the refrigerant condenser 22 again . Because the refrigerant condenser 22 and the refrigerant liquid tank 27 are provided in this manner, the liquid refrigerant can be cooled at the refrigerant condenser 22 so that a supercooling degree can be increased, and that cooling capacities by the air cooling heat exchanger 25 (evaporator) and the cold- water cooling heat exchanger 26 ( chiller) can be enhanced . [ 0026 ]

(Hot Water Circuit )

The hot water circuit 30 is provided with : a hot water pump 31 configured to deliver hot water; the above-described refrigerant condenser 22 configured to perform heat exchange between the hot water and the refrigerant ; a hot water heater 32 capable of further heating the hot water that has been heated by the refrigerant condenser 22 ; an air heat ing heat exchanger 33 into which the hot water that has been heated by the hot water heater 32 flows to heat the air flowing through the air heating heat exchanger 33 ; and a hot water liquid tank 34 configured to store part of the hot water that has passed through the air heating heat exchanger 33 and separate air bubbles from the hot water . The air that has been heated by the air heating heat exchanger 33 is supplied into the vehicle cabin CR as hot air for heating . The air heating heat exchanger 33 is occasionally referred to as hot water heater core . The hot water that has passed through the hot water liquid tank 34 flows into the hot water pump 31 again . Although not illustrated, the hot water circuit 30 may be provided with a radiator capable of cooling the hot water by outside air of the vehicle 11 as necessary . [ 0027 ] (Cold Water Circuit )

The cold water circuit 40 includes : a cold water pump

41 configured to deliver cold water; the above-described cold-water cooling heat exchanger 26 configured to cool the cold water by the refrigerant ; and a battery cooling device

42 inside which the cold water that has been cooled by the cold-water cooling heat exchanger 26 flows so that the battery 49 can be cooled . The battery cooling device 42 at least includes a heat exchanger thermally coupled to the battery 49 .

[ 0028 ]

(Vehicle )

Refer to FIG . 2 . The vehicle 11 (vehicle body I la ) includes : a dash panel 12 (partition wall ) configured to partition the vehicle cabin CR and a vehicle front compartment BR in front of the vehicle cabin CR; a right front side member 13 , which is a structure of the vehicle 11 and disposed in a right lower portion of the vehicle front compartment BR; and a left front side member 14 , which is a structure of the vehicle 11 and disposed in a left lower portion of the vehicle front compartment BR .

[ 0029 ]

(Left and Right Rigid Portions )

The vehicle 11 further includes : a right rigid portion 50 having a predetermined rigidity and disposed in a right side portion of the vehicle front compartment BR; and a left rigid portion 60 having a predetermined rigidity and disposed in a left side portion of the vehicle front compartment BR . The right rigid portion 50 and the left rigid portion 60 are parts of the vehicle body I la and, along with the dash panel 12 , define a space of the vehicle front compartment BR . [ 0030 ] (Right Front Side Panel )

The right rigid portion 50 includes : a right upper member 51 extending forward from a right upper corner of the dash panel 12 ; and a right front side panel 52 disposed from the right upper member 51 to the right front side member 13 . It is noted that the right upper member 51 and the right front side panel 52 may be bonded to each other or may be a single member integrally formed . [ 0031 ] (Right Suspension Tower)

The right front side panel 52 includes a right suspension tower 53 disposed to partly surround a right front suspension (not illustrated) . The right suspension tower 53 includes : a right tower portion 54 extending upward from the right front side member 13 ; and a right top portion 55 disposed on an upper end of the right tower portion 54 and capable of supporting an upper portion of the right front suspension . The right top portion 55 has a hole 55a coaxial with the right front suspension .

[ 0032 ]

(Left Front Side Panel )

The left rigid portion 60 includes : a left upper member 61 extending forward from a left upper corner of the dash panel 12 ; and a left front side panel 62 disposed from the left upper member 61 to the left front side member 14 . It is noted that the left upper member 61 and the left front side panel 62 may be bonded to each other or may be a single member integrally formed .

[ 0033 ]

(Left Suspension Tower)

The left front side panel 62 includes a left suspension tower 63 disposed to partly surround a left front suspension (not illustrated) . The left suspension tower 63 includes : a left tower port ion 64 extending upward from the left front side member 14 ; and a left top portion 65 disposed on an upper end of the left tower portion 64 and capable of supporting an upper portion of the left front suspension . The left top portion 65 has a hole 65a coaxial with the left front suspension.

[0034]

(Air Conditioning Unit, Heat Source Unit)

Refer to FIGs. 1 and 2. Some of the devices that constitute the vehicular thermal management system 10 are in a unitized state and mountable in the vehicle 11. Specifically, the vehicular thermal management system 10 includes: an air conditioning unit 16 that can be disposed immediately behind the dash panel 12 in the vehicle cabin CR and is capable of air conditioning of the vehicle cabin CR; and a vehicular heat source unit 17 that can be disposed in the vehicle front compartment BR. [0035] (Air Conditioning Unit)

The air conditioning unit 16 includes a case 16a containing the air cooling heat exchanger 25 (evaporator) , the air heating heat exchanger 33 (hot water heater core) , and the ref rigerant-f or-air expansion device 23. [0036] (Vehicular Heat Source Unit, Hot Water Device)

See FIGs. 2 and 3. The vehicular heat source unit 17 includes: the hot water pump 31; the refrigerant condenser 22; the hot water heater 32; the hot water liquid tank 34; the refrigerant liquid tank 27; the cold-water cooling expansion device 24; the cold water pump 41; the cold-water cooling heat exchanger 26; and an elongated structure 18 of an elongated shape in which these devices are disposed. [0037]

Hereinafter, the devices disposed in the elongated structure 18 will be referred to as supported devices 26 to 31. The elongated structure 18 includes: a support 70 configured to support the supported devices 26 to 31; and a cover member 80 configured to cover the supported devices 26 to 31. [0038] (Hot Water Device)

Refer to FIG. 1. Some of the supported devices 26 to 31 inside which hot water flows will be referred to as a hot water device 30a. It is noted that although the hot water device 30a in the example means all of the hot water pump 31, the refrigerant condenser 22, the hot water heater 32, and the hot water liquid tank 34, the hot water device 30a may include at least one of these devices. For example, only the hot water pump 31 may be disposed in the elongated structure 18.

[0039]

(Hot Water Heater)

The hot water heater 32 is a device for further heating the hot water that has been heated by the refrigerant condenser 22, and at least includes: a tank where the hot water flows ; an electric heater disposed inside the tank and capable of heating the hot water; a tank hot-water inlet via which the hot water is introduced into the tank; and a tank hot-water outlet via which the hot water is discharged from the tank .

[ 0040 ]

( Support )

Refer to FIG . 3 . The support 70 includes : a main portion 70a ( supporting portion) configured to support the supported devices 26 to 31 ; a first securing member 56 ( first securing portion ) that is disposed on an end of the main portion 70a on one side with respect to a longitudinal direction ( lateral direction) of the elongated structure 18 as a reference and that can be secured to the right rigid portion 50 of the vehicle 11 ; and a second securing member 66 ( second securing portion) disposed on an end of the main portion 70a on the other side with respect to the longitudinal direction of the elongated structure 18 as a reference and that can be secured to the left rigid portion 60 of the vehicle 11 .

[ 0041 ]

(Frame Members )

The main portion 70a includes two elongated frame members 71 , 71 disposed substantially in parallel to each other . Each of the frame members 71 is , for example , a metallic member of a hollow cylindrical shape and has the same length . An interval between the frame members 71 is not strictly specified . However, it is natural to set the interval at a slightly larger value for one of the supported devices 26 to 31 that has the longest dimension in a fore- and-aft direction . Meanwhile , the interval between the frame members 71 may be set at such a value that the supported devices 26 to 31 protrude forward or rearward from the frame members 71 .

[ 0042 ]

(Bridge Members )

Plural bridge members 72 bridge the two frame members 71 . Each of the bridge members 72 is , for example , a metallic band-shaped plate . Both ends of each of the bridge members 72 are secured to the frame members 71 . A securing method is , for example , welding or screw-fastening . The frame members 71 and the bridge members 72 form a ladder shape as a whole . The frame members 71 and the bridge members 72 may be made of any material as long as the material has a predetermined strength . As one example , preferably, the bridge members 72 are made of the same material as the frame members 71 . This improves corrosion resistance of portions where the frame members 71 and the bridge members 72 contact each other . Alternatively, a highly insulative material , such as a resin, is preferably used for the bridge members 72 . A local battery reaction in the portions where the frame members 71 and the bridge members 72 contact each other can be suppressed to improve the corrosion resistance . [ 0043 ] ( Supporting the Supported Devices by Bridge Members )

A screw through hole 74 through which a male screw 73 can be inserted i s formed in each of the bridge members 72 . A female screw 79 in which the male screw 73 can be tightened is formed in an upper surface 31b of a case 31a of the hot water pump 31 . The upper surface 31b of the case 31a of the hot water pump 31 is made to overlap a lower surface of the bridge member 72 , and the male screw 73 inserted through the screw through hole 74 and the female screw 79 are t ightened, so that the hot water pump 31 can be secured to the bridge member 72 .

[ 0044 ]

Similarly, the female screw 79 is formed in each of : an upper surface 34b of a case 34a of the hot water liquid tank 34 ; an upper surface 32b of a case 32a of the hot water heater 32 ; an upper surface 27b of a case 27 a of the refrigerant liquid tank 27 ; an upper surface 24b of a case 24a of the cold-water cooling expansion device 24 ; an upper surface 22b of a case 22a of the refrigerant condenser 22 ; an upper surface 26b of a case 26a of the cold-water cooling heat exchanger 26 ; and an upper surface 41b of a case 41a of the cold water pump 41 . Each of the devices is secured to the bridge member 72 by the male screw 73 .

[ 0045 ]

It is noted that a plurality of the supported devices 26 to 31 may be secured to the single bridge member 72 . Shapes of the cases of the supported devices 26 to 31 are not limited to block shapes or cylindrical shapes . [ 0046 ] (First Securing Member)

The first securing member 56 includes a first plate 57 having a rigidity . The first plate 57 includes : a plateshaped first overlapping portion 57a that can overlap the right top portion 55 of the right suspension tower 53 ; a first base portion 57c extending from an edge of the first overlapping portion 57a toward the frame members 71 ; and two first arm portions 57b, 57b extending from both ends of the first base portion 57c in the fore-and-aft direction toward the frame members 71 .

[ 0047 ]

A first semi-cylindrical member 58 is bonded to each of the first arm portions 57b . The first arm portion 57b and the first semi-cylindrical member 58 define a first insertion hole 59 in which an end portion of each of the frame members 71 on one side can be inserted .

[ 0048 ] ( Second Securing Member)

The second securing member 66 includes a second plate 67 having a rigidity . The second plate 67 includes : a plateshaped second overlapping portion 67a that can overlap the left top portion 65 of the left suspension tower 63 ; a second base portion 67 c extending from an edge of the second overlapping portion 67a toward the frame members 71 ; and two second arm portions 67b, 67b extending from both ends of the second base portion 67c in the fore-and-aft direction toward the frame members 71 .

[ 0049 ]

A second semi-cylindrical member 68 is bonded to each of the second arm portions 67b . The second arm portion 67b and the second semi-cylindrical member 68 define a second insertion hole 69 in which an end portion of each of the frame members 71 on one side can be inserted .

[ 0050 ]

(Bending of Base Portion)

Refer to FIGs . 3 and 6 . The first base portion 57 c is bent toward the first overlapping portion 57a . The second base portion 67c is bent toward the second overlapping portion 67a . However, the first base portion 57c and the second base portion 67c may not necessarily be bent .

[ 0051 ]

(Dash Panel Securing Portion) The support 70 further includes a dash panel securing member 76 (dash panel securing portion) disposed between and behind the first securing member 56 and the second securing member 66 and securable to an intermediate securing portion 15 disposed on an upper end of a front surface of the dash panel 12 of the vehicle 11 . A securing method is , for example , screw-fastening by a male screw and a female screw . [ 0052 ] (Cover Member)

Refer to FIG . 4 . The cover member 80 is , for example , a box with a whole upper surface opened . Specifically, the cover member 80 includes : a plate-shaped bottom portion 81 capable of covering a lower side of the supported devices 26 to 31 ; and a peripheral wall 82 extending upward from an entire edge of the bottom portion 81 and capable of surrounding the supported devices 26 to 31 from sides . [ 0053 ]

The peripheral wall 82 includes : a front wall portion 83 extending upward from a front edge of the bottom portion 81 and capable of covering the front of the supported devices 26 to 31 ; a rear wall portion 84 extending upward from a rear edge of the bottom portion 81 and capable of covering the rear of the supported devices 26 to 31 ; a left wall portion 86 extending upward from a left edge of the bottom portion 81 and capable of covering the left of the supported devices 26 to 31 ; and a right wall portion 85 extending upward from a right edge of the bottom portion 81 and capable of covering the right of the supported devices 26 to 31 . It is noted that although the cover member 80 is a single member made of a resin, plural plates may be provided and bonded to one another into a box shape . [ 0054 ] (Hanging of Cover Member with S-shaped Hooks )

Plural hook holes 88 aligned along the longitudinal direction are formed in upper ends of the front wal l portion 83 and the rear wall portion 84 of the cover member 80 . A lower end of an S-shaped hook 75 is hooked on each of the hook holes 88 , and an upper end of the S-shaped hook 75 is hooked on the frame member 71 . With the above-described configuration, the cover member 80 can be hung on the frame members 71 , thereby completing the vehicular heat source unit 17 illustrated in FIG . 1 . However, the elongated structure 18 may include the support 70 alone without the cover member 80 . [ 0055 ] ( Securing Method of Vehicular Heat Source Unit to Vehicle Body)

Refer to FIGs . 2 and 3 . Plural screw through holes 56b through which male screws 78 can be inserted are formed in the first overlapping portion 57a of the first securing member 56 . The first overlapping portion 57a is made to overlap the right top portion 55 of the right suspension tower 53 of the vehicle 11 , and the male screws 78 are tightened in female screws 55b, so that the first securing member 56 can be secured .

[ 0056 ]

Similarly, plural screw through holes 66b through which the male screws 78 can be inserted are formed in the second overlapping portion 67a of the second securing member 66 . The second overlapping portion 67a is made to overlap the left top portion 65 of the left suspension tower 63 of the vehicle 11 , and the male screws 78 are tightened in female screws 65b , so that the second securing member 66 can be secured .

[ 0057 ]

(Arrangement of Vehicular Heat Source Unit )

With the above-described configuration, the vehicular heat source unit 17 secured to the vehicle body I la is arranged in such a manner that the longitudinal direction of the elongated structure 18 (hereinafter simply referred to as " longitudinal direction" ) is a vehicle width direction . [ 0058 ] (Arrangement of Supported Devices 26 to 31 )

Refer to FIG . 5A . A description will be given on arrangement of the supported devices 26 to 31 in a plan view of the vehicular heat source unit 17 from an upper side. The refrigerant condenser 22, the hot water heater 32, and the hot water liquid tank 34 are aligned along the longitudinal direction of the elongated structure 18.

[0059]

In addition, the hot water pump 31 is aligned with the refrigerant condenser 22, the hot water heater 32, and the hot water liquid tank 34 along the longitudinal direction. The hot water liquid tank 34 is interposed between the hot water heater 32 and the hot water pump 31.

[0060]

It is noted that the refrigerant condenser 22 may be interposed between the hot water pump 31 and the hot water heater 32. The supported devices 26 to 31 may be in contact with the cover member 80 although illustrated as components separate from (not in contact with) the peripheral wall 82 of the cover member 80.

[0061]

(Position of Compressor)

Refer to FIG. 5B . A region where the refrigerant condenser 22 is projected in a direction orthogonal to the longitudinal direction of the elongated structure 18 (lateral direction in the example) as a reference will be referred to as projection region R. In other words, the projection region R is a region (space) between a first plane P l including an end portion of the refrigerant condenser 22 on one side and a second plane P2 including an end portion of the refrigerant condenser 22 on the other side with respect to the longitudinal direction as a reference . The compressor 21 overlaps the pro jection region R ( is located within the pro ection region R) , and is disposed in front of the vehicular heat source unit 17 . [ 0062 ]

It is noted that at least part of the compressor 21 may overlap the pro jection region R . The direction orthogonal to the longitudinal direction of the elongated structure 18 ( lateral direction in the example ) is not limited to the fore-and-aft direction . The compres sor 21 may be disposed above , below, or behind the vehicular heat source unit 17 .

[ 0063 ]

(Positions of Suction Port and Discharge Port of Compressor) The compressor 21 includes : a refrigerant suction port 21b for sucking the refrigerant ; and a refrigerant discharge port 21a for discharging the refrigerant . The refrigerant suction port 21b and the refrigerant discharge port 21a are disposed to overlap the pro jection region R . Although the refrigerant suction port 21b and the refrigerant discharge port 21a are oriented rearward and are aligned in the lateral direction, orientations and positions of the ports may be changed .

[ 0064 ]

(Orientation of Refrigerant Condenser)

The refrigerant condenser 22 is formed by stacking plural refrigerant condensation plates 28 . At least two kinds of the refrigerant condensation plates 28 are provided and alternately stacked to form a passage where only the refrigerant passes and a passage where only the hot water passes although a specific description on the configuration will be omitted . A stacking direction of the refrigerant condensation plates 28 is along a width direction of the elongated structure 18 ( fore-and-aft direction) .

[ 0065 ]

(Orientation of Cold-Water Cooling Heat Exchanger)

The cold-water cooling heat exchanger 26 is formed by stacking plural cold-water cooling plates 29 . At least two kinds of the cold-water cooling plates 29 are provided and alternately stacked to form a passage where only the refrigerant passes and a passage where only cold water passes although a specific description on the configuration will be omitted . A stacking direction of the cold-water cooling plates 29 is along the width direction of the elongated structure 18 ( fore-and-aft direction) .

[ 0066 ] (Arrangement of Supported Devices in Height Direction) Refer to FIG . 6A . A plane including an uppermost portion 18a, which is a portion of the elongated structure

18 that is located at an uppermost position, with a vertical direction of the plane being a normal direction , will be referred to as upper reference plane P3 . The supported devices 26 to 31 are located below the upper reference plane P3 . In other words , the supported devices 26 to 31 do not protrude upward from the elongated structure 18 . It is noted that the supported devices 26 to 31 may be in contact with the cover member 80 although illustrated as components separate from (not in contact with) the bottom port ion 81 of the cover member 80 .

[ 0067 ]

(Arrangement of Bottom Portion of Cover Member)

The bottom portion 81 of the cover member 80 is located below the first securing member 56 and the second securing member 66 .

[ 0068 ]

(Pipes )

Refer to FIG . 1 . The vehicular heat source unit 17 includes : inner coupling pipes (with no reference s igns ) configured to couple the supported devices 26 to 31 to one another; and outer coupling pipes 91 to 98 capable of coupling the supported devices 26 to 31 to outer devices (devices other than the supported devices 26 to 31 ) . [ 0069 ]

(Positions of Hot Water Pipes )

The outer coupling pipes 91 to 98 include : a first hot water pipe 91 inside which hot water flows toward the air heating heat exchanger 33 of the vehicle cabin CR; and a second hot water pipe 92 inside which the hot water that has passed through the air heating heat exchanger 33 of the vehicle cabin CR flows . The first hot water pipe 91 is coupled to the hot water heater 32 , for example . The second hot water pipe 92 is coupled to the hot water liquid tank 34 , for example . [ 0070 ]

Refer to FIGs . 6A and 6B . The first hot water pipe 91 and the second hot water pipe 92 extend through pipe holes 89 formed in the rear wall portion 84 and are bent in a crank shape . An outlet 91a of the first hot water pipe 91 and an inlet 92a of the second hot water pipe 92 are both oriented rearward, are located below the bottom portion 81 , and located behind the rear wall portion 84 . [ 0071 ] (Positions of Refrigerant Pipes )

Refer to FIG . 1 . The outer coupling pipes 91 to 98 include : a first refrigerant pipe 93 where the refrigerant that has passed through the refrigerant liquid tank 27 flows toward the air cooling heat exchanger 25 ; and a second refrigerant pipe 94 where the refrigerant that has passed through the air cooling heat exchanger 25 flows .

[ 0072 ]

Refer to FIGs . 6A and 6B . The first refrigerant pipe 93 and the second refrigerant pipe 94 extend through the pipe holes 89 formed in the rear wall portion 84 , and are bent in a crank shape . An outlet 93a of the first refrigerant pipe 93 and an inlet 94a of the second refrigerant pipe 94 are oriented rearward and are located below the bottom portion 81 and located behind the rear wall portion 84 .

[ 0073 ]

(Positions of Cold Water Pipes )

Refer to FIG . 1 . The outer coupling pipes 91 to 98 include : a first cold water pipe 95 where the cold water that has passed through the cold-water cooling heat exchanger 26 flows toward the battery 49 ; and a second cold water pipe 96 where the cold water that has passed through the battery cooling device 42 flows . [ 0074 ]

The first cold water pipe 95 and the second cold water pipe 96 extend through the pipe holes 89 formed in the bottom portion 81 . Refer to FIGs . 6A and 6B . An outlet 95a of the first cold water pipe 95 and an inlet 96a of the second cold water pipe 96 are oriented downward and are located below the bottom portion 81 .

[ 0075 ]

(Positions of Coupling Pipes )

Refer to FIG . 5B . The outer coupling pipes 91 to 98 include : a suction-side coupling pipe 97 including an outlet 97a couplable to the refrigerant suction port 21b; and a discharge-side coupling pipe 98 including an inlet 98a couplable to the refrigerant discharge port 21a . The outlet 97a of the suction-side coupling pipe 97 and the inlet 98a of the discharge-side coupling pipe 98 are both oriented forward .

[ 0076 ]

(First Effect )

Refer to FIGs . 1 and 2 . The vehicular thermal management system 10 includes the vehicular heat source unit 17 , which can be disposed within the vehicle front compartment BR in front of the vehicle cabin CR where passengers board in the vehicle 11 .

[ 0077 ]

The vehicular heat source unit 17 is provided with the hot water device 30a including at least one of : the hot water pump 31 configured to deliver hot water capable of heating the air blown into the vehicle cabin CR; the refrigerant condenser 22 configured to perform heat exchange between the hot water and the refrigerant capable of cooling the air blown into the vehicle cabin CR; the hot water heater 32 capable of further heating the hot water that has been heated by the refrigerant condenser 22 ; or the hot water liquid tank 34 configured to store part of the hot water and separate air bubbles from the hot water . Further, the vehicular heat source unit 17 includes the elongated structure 18 of an elongate shape provided with the hot water device 30a .

[ 0078 ]

Refer to FIG . 3 . The elongated structure 18 includes : the main portion 70a ( supporting portion) configured to support the hot water device 30a; the first securing member 56 that is disposed on an end of the main portion 70a on one side with respect to the longitudinal direction of the elongated structure 18 as a reference and that can be secured to the right rigid portion 50 of the vehicle 11 ; and the second securing member 66 that is disposed on an end of the main portion 70a on the other side with respect to the longitudinal direction of the elongated structure 18 as a reference and that can be secured to the left rigid portion 60 of the vehicle 11 .

[ 0079 ]

Refer to FIGs . 1 and 2 . The elongated structure 18 can be secured to the right rigid portion 50 and the left rigid portion 60 , which are parts of the vehicle body I la . Because the hot water device 30a is supported to the elongated structure 18 , the hot water device 30a can be reliably secured to the vehicle 11 . In addit ion, the elongated structure 18 has an elongated shape , and the plural devices can be disposed as the hot water device 30a along the longitudinal direction without becoming lumpy as in the related art , so that mountability of the plural devices to the vehicle front compartment BR can be improved to reliably secure the plural devices to the vehicle 11 . [ 0080 ] ( Second Effect )

The first securing member 56 can be secured to the right front side panel 52 of the right rigid portion 50 . The second securing member 66 can be secured to the left front side panel 62 of the left rigid portion 60 . Because the vehicular heat source unit 17 is to be disposed in the vicinity of the air conditioning unit 16 , unintentional heat loss can be effectively prevented . [ 0081 ] ( Third Effect )

The first securing member 56 can be secured to the right suspension tower 53 of the right rigid portion 50 . The second securing member 66 can be secured to the left suspension tower 63 of the left rigid portion 60 . The left and right suspens ion towers 53 , 63 have such a high rigidity that the vehicular heat source unit 17 can be secured to the vehicle 11 more reliably.

[0082]

(Fourth Effect)

The elongated structure 18 includes the dash panel securing member 76 interposed between the second securing member 66 and the first securing member 56 and securable to the intermediate securing portion 15 on the dash panel 12 of the vehicle 11. Because the elongated structure 18 includes the dash panel securing member 76 in addition to the second securing member 66 and the first securing member 56, the vehicular heat source unit 17 can be secured to the vehicle 11 even more reliably. [0083] (Fifth Effect)

Refer to FIG. 3. The hot water pump 31, the refrigerant condenser 22, the hot water heater 32, and the hot water liquid tank 34 are supported by the elongated structure 18. Only the hot water pump 31, for example, may be included as the hot water device 30a. However, when the other devices 22, 32, and 34 are included, more devices can be reliably secured to the vehicle 11.

[0084]

(Sixth Effect)

The vehicular heat source unit 17 includes the refrigerant liquid tank 27 configured to store part of the refrigerant and to separate the gaseous refrigerant from the liquid refrigerant . The refrigerant liquid tank 27 is supported by the elongated structure 18 . Moreover, the refrigerant liquid tank 27 , which is a device that constitutes a refrigeration cycle , is also supported by the elongated structure 18 and therefore can be secured to the vehicle 11 reliably .

[ 0085 ]

( Seventh Effect )

Refer to FIGs . 1 and 4 . The battery 49 configured to store traveling power of the vehicle 11 can be cooled by cold water cooled by the refrigerant . The vehicular heat source unit 17 includes : the cold water pump 41 configured to deliver cold water; the cold-water cooling expansion device 24 capable of expanding the refrigerant ; and the cold- water cooling heat exchanger 26 configured to perform heat exchange between the refrigerant that has been expanded by the cold-water cooling expansion device 24 and the cold water The cold water pump 41 , the cold-water cooling expansion device 24 , and the cold-water cooling heat exchanger 26 are supported by the elongated structure 18 . The devices configured to cool the battery 49 are likewise supported by the elongated structure 18 . The devices can be prevented from becoming lumpy and can be reliably secured to the vehicle 11 .

[ 0086 ]

(Eighth Effect )

Refer to FIG . 3 . The first securing member 56 is a plate including : the first overlapping portion 57a that can overlap the right rigid portion 50 ; and the first base portion 57c configured to couple the first overlapping portion 57a and the frame members 71 to each other . The first base portion 57c is bent toward the first overlapping portion 57a . The second securing member 66 is a plate including : the second overlapping portion 67a that can overlap the left rigid portion 60 ; and the second base portion 67c configured to couple the second overlapping portion 67a and the frame members 71 to each other . The second base portion 67c is bent toward the second overlapping portion 67a . By partly bending the first securing member 56 and the second securing member 66 , the elongated structure 18 is made more likely to deform in the longitudinal direction . Securing the elongated structure 18 to the vehicle 11 can be prevented from affecting rigidity of the vehicle 11 .

[ 0087 ]

<Second Example> Refer to FIGs . 7 and 8 . A vehicular heat source unit 17A in a second example will be described . As for the configuration in common with the vehicular heat source unit 17 in the first example , the same reference signs as those of the first example are given and their description will be omitted .

[ 0088 ]

(Elongated Structure )

The vehicular heat source unit 17A includes an elongated structure 120 of an elongate shape provided with the supported devices 26 to 31 . The elongated structure 120 , which has an elongated box shape with a whole upper surface opened, is provided with a support ing portion 120a configured to support the supported devices 26 to 31 , and a first securing portion 130 and a second securing portion 140 disposed on both ends of the supporting portion 120 a in the longitudinal direction .

[ 0089 ]

( Supporting Portion)

The supporting portion 120a includes : a plate-shaped bottom section 121 extending in the longitudinal direction and capable of covering a lower side of the supported devices 26 to 31 ; and a peripheral wall 122 extending upward from an entire edge of the bottom section 121 and surrounding the supported devices 26 to 31 .

[ 0090 ]

The peripheral wall 122 includes : a front wall section 123 extending upward from a front edge of the bottom section 121 and capable of covering the front of the supported devices 26 to 31 ; a rear wall section 124 extending upward from a rear edge of the bottom section 121 and capable of covering the rear of the supported devices 26 to 31 ; a left wall section 126 extending upward from a left edge of the bottom section 121 and capable of covering the left of the supported devices 26 to 31 ; and a right wall section 125 extending upward from a right edge of the bottom section 121 and capable of covering the right of the supported devices 26 to 31 .

[ 0091 ]

(First Securing Portion)

The first securing portion 130 is a plate-shaped portion including : a first overlapping section 131 that can overlap the right top portion 55 ( see FIG . 2 ) ; and a first base section 132 configured to couple an edge of the first overlapping section 131 and an upper edge of the right wall section 125 to each other . The first base section 132 is bent toward the first overlapping section 131 .

[ 0092 ]

( Second Securing Portion)

The second securing portion 140 is a plate-shaped portion including : a second overlapping section 141 that can overlap the left top portion 65 ( see FIG . 2 ) ; and a second base section 142 configured to couple an edge of the second overlapping sect ion 141 and an upper edge of the left wall section 126 to each other . The second base section 142 is bent toward the second overlapping section 141 .

[ 0093 ]

All of the above-described sections 121 to 126 , 130 to 132 , and 140 to 142 are continuously made of an identical material ( such as a resin) . The elongated structure 120 is a single member . Thus , the elongated structure 120 can be manufactured by injection molding so as to facil itate its production . Alternatively, when manufacture by injection molding is possible , the elongated structure 120 may be made of layers of plural members . The elongated structure 120 is made of a material that can improve strength and by injection molding in layers , so that the whole elongated structure 120 can be reinforced . Alternatively, the elongated structure 120 may be formed by coupling plural different members using a known two-color molding method . The first base section 132 and the second base section 142 are formed of a material more flexible than that of the supporting portion 120a so as to perform two-color molding such that the influence on the rigidity of the vehicle 11 can be suppressed more reliably . [ 0094 ] ( Supporting Method of Supported Devices )

Refer to FIGs . 7 and 8 . In a similar manner to the first example , the supported devices 26 to 31 are supported by the elongated structure 120 by screw-fastening . Screw through holes through which male screws 101 can be inserted are formed in the bottom section 121 . Female screws in which the male screw 101 can be tightened are formed in a lower surface 31c of the hot water pump 31 . The lower surface 31c of the hot water pump 31 is placed on an upper surface 121a of the bottom section 121 , and the male screws 101 extending through the screw through holes are tightened, so that the hot water pump 31 can be secured to the bottom sect ion 121 . [ 0095 ]

Similarly, a female screw (not illustrated) is formed in each of a lower surface 34c of the hot water liquid tank 34 , a lower surface 32c of the hot water heater 32 , a lower surface 27c of the refrigerant liquid tank 27 , a lower surface 22c of the refrigerant condenser 22 , a lower surface 26c of the cold-water cooling heat exchanger 26 , and a lower surface 41c of the cold water pump 41 , and secured by the male screw 101 .

[ 0096 ]

(Arrangement of Supported Devices )

The supported devices 26 to 31 are all contained in the elongated structure 120 . In other words , the supported devices 26 to 31 do not protrude upward from an edge of an opening of the box . However, the supported devices 26 to 31 may protrude from the opening of the box .

[ 0097 ]

Preferably, the elongated structure 120 is provided with drainage holes (not illustrated) in desired positions of the plate-shaped bottom section 121 . When water or other liquid component is unintentionally accumulated within the elongated structure 120 , the water or other liquid component can be effectively drained .

[ 0098 ]

<Third Example>

Refer to FIG . 9 . A vehicular heat source unit 17B in a third example will be described . As for the conf iguration in common with the vehicular heat source unit 17A in the second example , the same reference signs as those of the second example are given and their description will be omitted .

[ 0099 ]

An elongated structure 210 of the vehicular heat source unit 17B includes a bottom extension section 212 extending forward from part of a front edge 211a of a bottom section

211 of a main portion 210a . The bottom extension section

212 supports the compressor 21 by the male screws 101 tightened in female screws formed in a lower surface of the compressor 21 . The bottom extension section 212 includes an extension side wall 213 extending upward from an edge of the bottom extension section 212 . The extension side wall 213 surrounds the compressor 21 except the rear, and is continuous to the front wall section 123 . It is noted that the portion configured to support the compressor 21 is not limited to the bottom extension section 212 .

[ 0100 ]

It is noted that the present invention is not limited to the examples as long as operations and effect s of the present invention are exhibited . [ 0101 ]

For example , in the above description of the refrigerant circuit 20 , the refrigerant that has passed through the refrigerant condenser 22 branches into two flows . However, without branching, the refrigerant may flow into the air cooling heat exchanger 25 . In this case , the vehicular heat source unit 17 does not include the cold- water cooling expansion device 24 , the cold-water cooling heat exchanger 26 , and the cold water pump 41 . This vehicular heat source unit 17 does not have a function of cooling the battery 49 . However, the vehicular heat source unit 17 still has a function of supplying the refrigerant to the air cooling heat exchanger 25 and a function of supplying the hot water to the air heating heat exchanger 33 , and is reliably secured to the vehicle 11 . [Reference Signs List ] [0102]

10: vehicular thermal management system

11: vehicle, Ila: vehicle body

12 : dash panel

17, 17A, 17B: vehicular heat source unit

18: elongated structure

27: refrigerant liquid tank

30a: hot water device

31: hot water pump

32 : hot water heater

50: right rigid portion

52: right front side panel

53: right suspension tower

56: first securing member (first securing portion)

57: first plate, 57a: first overlapping portion, 57c: first base portion

60: left rigid portion

62: left front side panel

63: left suspension tower

66: second securing member (second securing portion)

67: second plate, 67a: second overlapping portion, 67c: second base portion

70a: main portion (supporting portion)

76: dash panel securing portion

BR: vehicle front compartment

Claims

[CLAIMS]

[Claim 1]

A vehicular heat source unit (17, 17A, 17B) that can be disposed inside a vehicle front compartment (BR) in front of a vehicle cabin (CR) where passengers board in a vehicle (11) , the vehicular heat source unit (17, 17A, 17B) comprising : a hot water device (30a) comprising at least one of a following : a hot water pump (31) configured to deliver hot water capable of heating air blown into the vehicle cabin (CR) ; a refrigerant condenser (22) configured to perform heat exchange between the hot water and a refrigerant capable of cooling the air blown into the vehicle cabin (CR) ; a hot water heater (32) capable of further heating the hot water that has been heated by the refrigerant condenser (22) ; or a hot water liquid tank (34) configured to store part of the hot water and separate air bubbles from the hot water; and an elongated structure (18, 120, 210) of an elongated shape provided with the hot water device (30a) , the elongated structure (18, 120, 210) comprising: a supporting portion (70a, 120a, 210a) configured to support the hot water device (30a) ; a first securing portion (56, 130) that is disposed on an end of the supporting portion (70a, 120a, 210a) on one side with respect to a longitudinal direction of the elongated structure (18, 120, 210) as a reference and that can be secured to a right rigid portion (50) of the vehicle (11) ; and a second securing portion (66, 140) that is disposed on an end of the supporting portion (70a, 120a, 210a) on an opposite side with respect to the longitudinal direction of the elongated structure (18, 120, 210) as a reference and that can be secured to a left rigid portion (60) of the vehicle (11) .

[Claim 2]

The vehicular heat source unit (17, 17A, 17B) according to claim 1, wherein the first securing portion (56, 130) can be secured to a right front side panel (52) of the right rigid portion (50) , and wherein the second securing portion (66, 140) can be secured to a left front side panel (62) of the left rigid portion ( 60 ) .

[Claim 3]

The vehicular heat source unit (17, 17A, 17B) according to claim 1 wherein the first securing portion (56, 130) can be secured to a right suspension tower (53) of the right rigid portion (50) , and wherein the second securing portion (66, 140) can be secured to a left suspension tower (63) of the left rigid portion ( 60 ) .

[Claim 4]

The vehicular heat source unit (17, 17A, 17B) according to claim 1, wherein the elongated structure (18, 120, 210) comprises a dash panel securing portion (76) that can be secured to a dash panel (12) of the vehicle (11) between the second securing portion (66, 140) and the first securing portion (56, 130) .

[Claim 5]

The vehicular heat source unit (17, 17A, 17B) according to any one of claims 1 to 4, wherein the hot water pump (31) , the refrigerant condenser (22) , the hot water heater (32) , and the hot water liquid tank (34) are supported by the elongated structure (18, 120, 210) .

[Claim 6]

The vehicular heat source unit (17, 17A, 17B) according to claim 5, comprising a refrigerant liquid tank (27) configured to store part of the refrigerant and to separate the refrigerant in a gaseous state from the refrigerant in a liquid state wherein the refrigerant liquid tank (27) is supported by the elongated structure (18, 120, 210) .

[Claim 7]

The vehicular heat source unit (17, 17A, 17B) according to claim 6, capable of cooling a battery (49) configured to store traveling power of the vehicle (11) by cold water cooled by the refrigerant, the vehicular heat source unit (17, 17A, 17B) comprising: a cold water pump (41) configured to deliver the cold water; a cold-water cooling expansion device (24) capable of expanding the refrigerant; and a cold-water cooling heat exchanger (26) configured to perform heat exchange between the refrigerant that has been expanded by the cold-water cooling expansion device (24) and the cold water, wherein the cold water pump (41) , the cold-water cooling expansion device (24) , and the cold-water cooling heat exchanger (26) are supported by the elongated structure (18, 120, 210) .

[Claim 8]

The vehicular heat source unit (17, 17A, 17B) according to claim 5, wherein the first securing portion (56, 130) has a plate shape and comprises a first overlapping portion (57a, 131) that can overlap the right rigid portion (50) , and a first base portion (57c, 132) configured to couple the first overlapping portion (57a, 131) and the supporting portion (70a, 120a, 210a) to each other, the first base portion (57c, 132) being bent toward the first overlapping portion (57a, 131) , and wherein the second securing portion (66, 140) has a plate shape and comprises a second overlapping portion (67a, 141) that can overlap the left rigid portion (60) , and a second base portion (67c, 142) configured to couple the second overlapping portion (67a, 141) and the supporting portion (70a, 120a, 210a) to each other, the second base portion (67c, 142) being bent toward the second overlapping portion (67a, 141) .