JP5119042B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat provided with a mechanism for temperature adjustment.

  2. Description of the Related Art As a vehicle seat, a vehicle seat having a mechanism for blowing out temperature-adjusted air from a seat skin that contacts a seated occupant is known (for example, see Patent Documents 1 and 2).

These vehicle seats have a blower and a heat exchanger built in the seat body so that air that has been air-conditioned is blown out from the seat skin through a passage in the seat pad.
JP 2007-223542 A JP 2004-16569 A

  However, in the above conventional vehicle seat, a dedicated duct for introducing waste heat and air is provided inside the seat body, which increases the number of parts, which increases the vehicle weight and the manufacturing cost. It is easy to cause.

  Therefore, the present invention aims to provide a vehicle seat that can reduce the weight of the vehicle and the manufacturing cost by reducing the number of dedicated ducts for supplying and discharging air.

The invention according to claim 1, which solves the above-described problem, is configured such that air temperature-adjusted by an air conditioner (for example, an air conditioner 18, 19 in an embodiment described later) is converted into a seat pad (for example, a seat in an embodiment described later) In a vehicle seat that blows air through a pad 21) to a seat skin (for example, a seat skin 17 in an embodiment described later), a back surface of the seat pad is a seat support surface of a vehicle body floor (for example, a vehicle floor 11 in an embodiment described later). (For example, the seat back support surface 11c and the under-seat support surface 11a in the embodiment described later) are brought into contact with the heat exchanger of the air conditioner (for example, the heat exchanger in the embodiment described later ) on the back of the seat pad. 26) is formed, and a storage recess (for example, a storage recess 35 in an embodiment described later) is formed, Is provided with a supply passage (for example, a supply passage 22 in an embodiment described later) for guiding the air whose temperature has been adjusted by the heat exchanger of the air conditioner to the seat skin side, and the heat from the outside of the seat pad. An introduction duct for introducing air into the exchanger (for example, an introduction duct 41 in an embodiment described later) and an exhaust duct for exhausting waste heat of the air conditioner to the outside of the seat pad (for example, an exhaust duct in an embodiment described later) 38) and an outlet of the heat exchanger connected to the supply passage (for example, an outlet 28 in an embodiment described later),
Groove portions (for example, first groove portion 37 and second groove portion 40 in an embodiment described later) are formed on the back surface of the seat pad so as to face the vehicle body floor, and the groove portion of the seat pad and the vehicle body floor are formed. The introduction duct or the exhaust duct of the air-conditioning apparatus is configured between, and the introduction duct and the exhaust duct are isolated by bringing the back surface of the seat pad into contact with the seat support surface of the vehicle body floor It is characterized by.

The invention according to claim 2, the vehicular seat according to claim 1, at a site adjacent to the groove on the back of the seat pad, the back and the vehicle body of the seat pad along an edge of the groove A sealing material (for example, a sealing material 39 in an embodiment described later) that fills the space between floors is provided.

  According to the first aspect of the present invention, since the duct of the air conditioner is configured by the groove on the back surface of the seat pad and the vehicle body floor, the dedicated duct for introducing and exhausting air is reduced, and the vehicle weight is reduced and manufactured. Cost can be reduced. In addition, according to the present invention, since a part of the wall of the duct is configured by the vehicle body floor, the occupied space of the duct space in the seat pad can be reduced. As a result, a sufficient thickness of the seat pad can be ensured and the sitting comfort can be improved.

Further, on the back of the seat pad, in order to further the formation of the housing recess for housing the heat exchanger, a duct constituted by the groove and the vehicle body floor can be easily connected to the air supply and discharge of the heat exchanger.

In addition , the exhaust duct connected to the waste heat part of the heat exchanger or the introduction duct connected to the air introduction part is configured by the groove on the back of the seat pad and the vehicle body floor, so the piping structure that tends to be complicated around the heat exchanger is simplified. Can be

According to the second aspect of the present invention, since the seal material that fills the space between the back surface of the seat pad and the vehicle body floor is provided in the portion adjacent to the groove portion on the back surface of the seat pad, the air escape through the gap adjacent to the groove portion. Can be prevented. In particular, when an exhaust duct or an introduction duct is formed between the groove portion of the seat pad and the vehicle body floor, the return of waste heat through the gap adjacent to the groove portion can be effectively prevented.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, “up”, “down”, “front”, and “rear” mean up and down and front and rear of the vehicle body unless otherwise specified.

  FIG. 1 is a perspective view, partially broken away, showing a rear seat portion of a vehicle 1 employing a vehicle seat 10 (hereinafter referred to as “seat 10”) according to the present invention. The vehicle 1 is a vehicle on which a fuel cell (not shown) is mounted, and a gas cylinder (not shown) filled with fuel gas to be supplied to the fuel cell is disposed on the rear side of the seat 10 in the rear seat.

  The vehicle body floor 11 facing the passenger compartment is formed so as to protrude from the footrest space at the front portion of the seat 10 to the lower portion of each seat 10, and the raised portion serves as a seat lower support surface 11 a. Between the left and right under-seat support surfaces 11a of the vehicle body floor 11, a center tunnel portion 11b that is further raised with respect to the under-seat support surface 11a is provided. The left and right under-seat support surfaces 11a and the rear end portions of the center tunnel portion 11b are bent upward in a step shape, and a portion of the bent region that is continuous with the left and right under-seat support surfaces 11a is the seat back support surface 11c. Has been. In the rear end region of the vehicle body floor 11, a cylinder cover portion 11d that covers the upper side of the gas cylinder is formed to bulge upward in a semicylindrical shape.

  Each seat 10 is provided separately on the left and right with a center console 12 and a rear armrest 13 disposed in the center in the vehicle width direction. In the case of this embodiment, the two sheets 10 have a bilaterally symmetric shape, but both have the same function and structure, and therefore, one sheet 10 will be described as a representative below.

The seat 10 includes a seat cushion 14 on which an occupant sits, a seat back 15 that serves as a backrest, and a headrest 16 that is disposed above the seat back 15 and supports the head of the occupant. the seat back 1 5, the air conditioner 18, 19 for blowing the temperature-adjusted air to the seat skin 17 is respectively individually provided.

Figure 2 shows a longitudinal section of the sheet 1 0 corresponding to A-A cross section of FIG.
As shown in the drawing, each seat body 20 constituting the seat cushion 14 and the seat back 15 includes a seat pad 21 made of urethane foam and the like, and a seat skin 17 that covers the outer surface of the seat pad 21. Inside 21, a supply passage 22 that guides the air whose temperature is adjusted by the air conditioners 18 and 19 to the seat skin 17 is provided. The sheet skin 17 is provided with a plurality of blowout holes penetrating the front and back of the sheet skin 17 when a cloth material is used, and fine holes of the texture become air blowing holes, and when a leather material is used.

  As shown in FIG. 1, a plurality of wire frames 23 are attached to the under-seat support surface 11 a and the seat back support surface 11 c of the vehicle body floor 11, and the components of the air conditioners 18 and 19 and the electrical cable 24 are provided. Are supported by the wire frame 23 together with the seat body 20. A console frame 25 is attached to the center tunnel portion 11 b of the vehicle body floor 11, and the center console 12 is attached to the console frame 25. In the figure, reference numeral 70 denotes a rear parcel shelf that covers the left and right seats 10 and the rear upper portions of the rear armrest 13.

3 is a view showing the back surface of the seat back 15 together with the air conditioner 19, and FIG. 4 is a cross-sectional view of the seat back 15 corresponding to the BB cross section of FIG.
The air conditioner 19 disposed in the seat back 15 faces a heat exchanger 26 having a built-in Peltier element, a blower 27 for sending air to the heat exchanger 26, and one electrode of the Peltier element in the heat exchanger 26. A blowout port 28 and a discharge port 29 facing the other electrode of the Peltier element are provided, and these are configured as an integrated air conditioning block 30. The air conditioning block 30 is attached to a wire frame 23 (see FIG. 1) on the vehicle body floor 11 side via a bracket 31. When the Peltier element of the heat exchanger 26 is energized, one electrode becomes a heating surface and the other electrode becomes a cooling surface. However, the heating surface and the cooling surface are reversed by changing the energization direction. Therefore, the heat exchanger 26 can appropriately supply hot air and cold air to the outlet 28 according to the energization direction.

  The seat back 15 is attached in a state where the back surface of the seat pad 21 is in contact with the seat back support surface 11 c of the vehicle body floor 11. However, in the seat back support surface 11c, the vehicle width direction outer side region on the upper side where the air conditioning block 30 is arranged is a recessed portion 32 that is recessed toward the rear side of the vehicle body. Is in a non-contact state. A guide plate 34 extends in the vehicle width direction outer side region of the seat back support surface 11c, and the guide plate 34 faces the back side of the seat pad 21 with a predetermined gap.

  A storage recess 35 is formed on the back surface of the seat pad 21 near the vehicle body side, and the air conditioning block 30 attached to the vehicle body floor 11 via the bracket 31 is arranged in the storage recess 35. In this state, in the air conditioning block 30, the suction portion of the blower 27 faces the induction plate 34 on the back side of the seat pad 21, and the discharge port 29 of the heat exchanger 26 is located near the seat pad 21 and the hollow portion near the center in the vehicle width direction. It faces a space 36 having a substantially triangular cross section sandwiched between 32 inclined surfaces. A first groove portion 37 (groove portion) extending from the side portion of the air conditioning block 30 toward the upper side of the seat back 15 is formed on the back surface of the seat pad 21 near the center in the vehicle width direction. The first groove portion 37 communicates with a space 36 having a substantially triangular cross section facing the discharge port 29 of the air conditioning block 30 and is discharged from the discharge port 29 between the vehicle body floor 11 (seat back support surface 11c). An exhaust duct 38 (duct) for discharging waste heat of the heat exchanger 26 toward the upper portion of the seat back 15 is configured.

  A sponge rubber for sealing the space between the seat pad 21 and the vehicle body floor 11 (seat back support surface 11c) on the outer edge in the vehicle width direction of the first groove portion 37 on the back surface of the seat pad 21. A sealing material 39 such as is interposed. As shown in FIG. 3, the sealing material 39 is formed in a substantially L shape, and extends from the edge of the first groove portion 37 to a position straddling the back side of the discharge port 29 of the air conditioning block 30. It bends at a substantially right angle from the lower end and extends toward the center in the vehicle width direction. The sealing material 39 continuously seals between the seat pad 21 and the vehicle body floor 11 (seat back support surface 11c) over almost the entire region formed in a substantially L shape. Therefore, the sealing material 39 isolates the space part on the side where the discharge port 29 opens and the space part on the blower 27 side in a substantially sealed state on the back side of the seat pad 21.

  Further, in the rear side of the seat pad 21, an area outside in the vehicle width direction adjacent to the blower storage position of the storage recess 35 is connected to the side in the vehicle width direction of the seat back 15 and the storage recess 35. A groove 40 (groove) is formed. The second groove portion 40, together with the seat back support surface 11c of the vehicle body floor 11 and the guide plate 34, constitutes an introduction duct 41 (duct) for introducing air from the side portion of the seat back 15 to the blower 27. It has become.

5-7 shows the structure of the air conditioner 18 arrange | positioned at the seat cushion 14, and its peripheral part.
As shown in FIG. 1, the air conditioner 18 includes a heat exchanger 43 incorporating a Peltier element, a blower 44 for sending air to the heat exchanger 43, and a blowout facing one electrode of the Peltier element in the heat exchanger 43. A port 45 and a discharge port 46 facing the other electrode of the Peltier element are provided. The blower 44 is attached to the console frame 25 at the center in the vehicle width direction, and the heat exchanger 43 is attached to the wire frame 23 on the vehicle body floor 11 (on the under-seat support surface 11a) below the seat cushion 14. The blow-out portion of the blower 27 and the heat exchanger 43 are connected by a long duct 47 that extends in the vehicle width direction along the bent shape of the vehicle body floor 11. The function and the like of the heat exchanger 43 are the same as those of the air conditioner 19 on the seat back 15 side.

Here, the blower 44 is disposed inside the center console 12 at a substantially central position in the vehicle width direction, and a plurality of air introductions are provided near the rear end of the upper wall of the center console 12 as shown in FIG. A hole 48 is formed. The plurality of air introduction holes 48 are located immediately below the rear armrest 13 in the retracted state, and are difficult to see from the vehicle interior side.
Further, a heat insulating member 49 is attached on the center tunnel portion 11b facing the center console 12 as shown in FIG. 5, and heat from the lower surface side of the center tunnel portion 11b (for example, below the center tunnel portion 11b). Intrusion of generated heat of the fuel cell is prevented.

The seat pad 21 of the seat cushion 14 is attached to the under-seat support surface 11 a of the vehicle body floor 11 in a contact state. Then, the approximate center of the back of the seat pad 21, will retract concave portion 50 of the heat exchanger 43 of the air conditioner 18 is arranged as shown in FIG. 7 are provided. Air outlet 45 of the heat exchanger 43 is connected to the supply passage 22 of the seat pad 21 as shown in FIG. 2, air outlet 45, the space portion in the vehicle width direction outer side of the retract and the recess 50 as shown in FIG. 7 It is facing 50a. Further, a third groove portion 52 is formed on the back surface of the seat pad 21 to communicate the space portion 50a toward the rear side of the vehicle body side portion of the seat cushion 14. The third groove 52 forms an exhaust duct 53 with the lower seat support surface 11a (the vehicle body floor 11).

  As described above, in the case of the seat 10 of this embodiment, on the seat back 15 side, the first groove portion 37 and the second groove portion 40 formed on the back surface of the seat pad 21 include the seat back support surface 11c. The exhaust duct 38 and the introduction duct 41 are formed between them, and on the seat cushion 14 side, the third groove portion 52 formed on the back surface of the seat pad 21 forms the exhaust duct 53 with the lower seat support surface 11a. Therefore, the number of dedicated ducts for supplying and discharging air to be installed can be reduced, thereby reducing vehicle weight and manufacturing cost.

  Further, in the seat 10, ducts 38, 41, 53 are formed between the back surface (groove portion) of each seat pad 21 of the seat back 15 and the seat cushion 14 and the vehicle body floor 11. The occupied volume of the space can be reduced, and a sufficient thickness of the seat pad 21 can be ensured accordingly. Therefore, the seating comfort of the seat 10 is not impaired.

Furthermore, in this embodiment, the back of the seat back 15 side of the seat pad 21, because the retract and recess 35 for accommodating the heat exchanger 26 and the blower 27 are formed, the heat exchanger 26 and the blower 27 Can be easily connected to the exhaust duct 38 and the introduction duct 41 without a complicated piping structure. Similarly, on the back of the seat cushion 14 side of the seat pad 21, because the retract and recess 50 for accommodating the heat exchanger 43 is formed, easily connected to the exhaust duct 53 to heat exchanger 43 can do.

  Note that the structure of the seat according to the present invention is also applicable when the heat exchanger of the air conditioner is disposed outside the seat. However, if the heat exchangers 26 and 43 including Peltier elements are arranged on the back of the seat pad 21 as in this embodiment, the piping structure around the heat exchangers 26 and 43 that tend to be complicated. This is particularly effective.

Further, in the case of the seat 10 of this embodiment, on the back surface of the seat pad 21 on the seat back 15 side, a sealing material 39 is disposed in a portion adjacent to the first groove portion 37 and the opening of the discharge port 29 of the heat exchanger 26 is opened. Since the space part on the side to be blown off and the space part on the side of the blower 27 are separated in a substantially sealed state by the sealing material 39, the waste heat discharged from the discharge port 29 is transferred to the seat pad 21 and the seat back support surface. It is possible to reliably prevent the air from flowing back to the suction portion of the blower 27 through the gap with 11c (the vehicle body floor 11). Therefore, the air conditioning efficiency can be increased.

  In addition, this invention is not limited to said embodiment, A various design change is possible in the range which does not deviate from the summary.

The perspective view which fractured | ruptured a part of vehicle interior rear part which shows the vehicle seat of one Embodiment of this invention. Sectional drawing of the vehicle seat corresponding to the AA cross section of FIG. 1 which shows the same embodiment. The rear view of the seat back which shows the embodiment. Sectional drawing corresponding to the BB cross section of FIG. 1 which shows the same embodiment. Sectional drawing corresponding to CC cross section of FIG. 1 which shows the same embodiment. The expansion perspective view of the D section of Drawing 1 showing the embodiment. The rear view of the seat cushion of FIG. 1 which shows the same embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Vehicle seat 11 ... Vehicle body floor 18, 19 ... Air conditioner 21 ... Seat pad 26 ... Heat exchanger 35 ... Storage recessed part 37 ... 1st groove part (groove part)
38 ... Exhaust duct (duct)
39 ... Sealing material 40 ... Second groove (groove)
41. Introduction duct (duct)
50 ... retract and recesses 52 ... third groove (groove)
53 ... Exhaust duct

Claims (2)

In the vehicle seat that blows the air whose temperature is adjusted by the air conditioner to the seat skin through the seat pad,
The rear surface of the seat pad is brought into contact with the seat support surface of the vehicle body floor;
A storage recess for storing the heat exchanger of the air conditioner is formed on the back of the seat pad,
Inside the seat pad, a supply passage is provided for guiding the air whose temperature is adjusted by the heat exchanger of the air conditioner to the seat skin side,
An introduction duct for introducing air into the heat exchanger from the outside of the seat pad, an exhaust duct for exhausting waste heat of the air conditioner to the outside of the seat pad, and the heat exchanger connected to the supply passage. An outlet, and
On the back surface of the seat pad, a groove portion that opens toward the vehicle body floor is formed, and the introduction duct or the exhaust duct of the air conditioner is configured between the groove portion of the seat pad and the vehicle body floor ,
A vehicle seat characterized in that the introduction duct and the exhaust duct are isolated by bringing a back surface of the seat pad into contact with a seat support surface of the vehicle body floor . A site adjacent to the groove on the back of the seat pad, according to claim 1, characterized in that a rear seal member to fill between the vehicle body floor of the seat pad along an edge of the groove Vehicle seats.

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