Vehicle seat air conditioning device

Abstract

To suppress persons at the front seat and at the rear seat of a vehicle from feeling discomfort.SOLUTION: A vehicle seat air conditioning device 1 includes: an air suction ventilation passage 40 introducing air sucked through a suction port 20 to a blower 31; a first ventilation passage 51 introducing the air fed from the blower 31 to a first discharge port 21 located at the front surface and the top surface of a seat back 13; a second ventilation passage 52 introducing the air sent from the blower 31 to a second discharge port 22 located at the back surface of the seat back 13; and a switching part 70 switching a destination of the air discharged from the blower 31 to the first ventilation passage 51 or the second ventilation passage 52. The first ventilation passage 51 discharges the air sent out from the blower 31 via the switching part 70 to at least one direction of the front and the obliquely front of a seat 10 from the first discharge port 21. The second ventilation passage 52 discharges the air sent out from the blower 31 via the switching part 70 to a direction different from the back of the seat 10 from the second discharge port 22.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to a seat air conditioning system that blows air to a person seated in a seat. [Background technology]

[0002] In recent years, seat air conditioners that blow conditioned air toward the occupant from the seat have become known. Conventional seat air conditioners can improve comfort by blowing air in different ways during the initial transitional period of cooling and during the stable period when the cabin temperature approaches the target temperature.

[0003] For example, in the vehicle seat air conditioning device of Patent Document 1, the control device controls the first on-off valve, the second on-off valve, and the third on-off valve, respectively, so that the conditioned air is blown around the occupant's neck or toward the occupant's back. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2020-199990 Summary of the Invention [Problem to be solved by the invention]

[0005] In the early stages of driving when cooling is insufficient, seat air conditioning systems blow out warm air through the interior of the seat, which can cause discomfort to the occupants. By blowing air from the rear of the seat, for example, it is possible to prevent discomfort for the front seat occupants. However, because warm air is blown out from the rear of the seat, it can cause discomfort to the occupants in the rear seats.

[0006] Therefore, the present disclosure provides a vehicle seat air-conditioning device that can reduce discomfort felt by occupants in the front and rear seats of the vehicle. [Means for solving the problem]

[0007] A vehicle seat air-conditioning device according to one aspect of the present disclosure is a vehicle seat air-conditioning device that is disposed in a vehicle and is used for a seat having a seat back and a sitting portion, and includes: a blower; an intake ventilation path that guides air drawn in from an air intake port in the vehicle to the blower when the blower is operated; a first ventilation path that guides air sent out from the blower to a first outlet port located on at least one of the front and top surfaces of the seat back; and a second ventilation path that guides the air sent out from the blower to a back surface of the seat back, a side behind the sitting portion, or The seat cushion is provided with a second ventilation duct that guides the air to a second outlet located on the side of the seat, and a switching unit that switches the destination of the air discharged from the blower between the first ventilation duct and the second ventilation duct, wherein the first ventilation duct discharges the air sent out from the blower via the switching unit from the first outlet in at least one direction forward and diagonally forward of the seat, and the second ventilation duct discharges the air sent out from the blower via the switching unit from the second outlet in a direction different from the rear of the seat. [Effects of the Invention]

[0008] The vehicle seat air-conditioning system of the present disclosure can reduce discomfort felt by occupants of the front and rear seats of the vehicle. [Brief explanation of the drawings]

[0009] [Figure 1A] 1 is a perspective view showing the appearance of a vehicle seat air-conditioning device according to an embodiment; [Figure 1B] 1 is a rear view of a vehicle seat air conditioning device according to an embodiment of the present invention; [Figure 1C] 1 is a side view of a vehicle seat air conditioning device according to an embodiment; [Figure 2] 2 is a schematic diagram showing an air passage and the like of the vehicle seat air conditioning device according to the embodiment. FIG. [Figure 3A] 1 is a perspective view of an air-flow channel selection switching device for a vehicle seat air-conditioning device according to an embodiment; [Figure 3B] 3B is a perspective view of the ventilation channel selection switching device as seen from a different direction than that of FIG. 3A. FIG. [Figure 4] 3 is a diagram illustrating a switching unit of the ventilation channel selection switching device according to the embodiment. FIG. [Figure 5] 1 is a block diagram showing a vehicle seat air conditioning device according to an embodiment; [Figure 6] 3A and 3B are diagrams showing air flows in a first mode and a second mode of the vehicle seat air conditioning device according to the embodiment. [Figure 7A] FIG. 2 is a perspective view showing the appearance of a vehicle seat air-conditioning device according to a first modified example of the embodiment. [Figure 7B] FIG. 2 is a view of a vehicle seat air-conditioning device according to a first modified embodiment, viewed obliquely from the rear. [Figure 8] FIG. 4 is a schematic view showing an air passage and the like of a vehicle seat air-conditioning device according to a first modified example of the embodiment. [Figure 9] FIG. 10 is a perspective view of a blower of a vehicle seat air conditioning device according to a first modified example of the embodiment. [Figure 10] 6A and 6B are diagrams showing air flows in a first mode and a second mode of a vehicle seat air-conditioning device in a first modified example of the embodiment. [Figure 11] FIG. 10 is a perspective view showing the appearance of a vehicle seat air-conditioning device according to a second modified embodiment. [Figure 12] FIG. 10 is a block diagram showing a vehicle seat air-conditioning device according to a second modified example of the embodiment. [Figure 13] 10 is a schematic view showing an air passage and the like of a vehicle seat air-conditioning device according to a second modified example of the embodiment. FIG. [Figure 14] 10A and 10B are diagrams showing air flows in a first mode and a second mode of a vehicle seat air-conditioning device in a second modified example of the embodiment. [Figure 15] FIG. 11 is a schematic view showing an air passage and the like of a vehicle seat air-conditioning device according to a third modified example of the embodiment. [Figure 16] 10A and 10B are diagrams showing air flows in a first mode and a second mode of a vehicle seat air-conditioning device in a third modified example of the embodiment. [Figure 17]FIG. 10 is a rear view of a vehicle seat air-conditioning device according to a fourth modified embodiment. [Figure 18] FIG. 10 is a side view of a vehicle seat air-conditioning device according to a fourth modified embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] The embodiments described below are all comprehensive or specific examples. The numerical values, shapes, materials, components, arrangement positions and connection forms of the components shown in the following embodiments are merely examples and are not intended to limit the present disclosure. Furthermore, among the components in the following embodiments, components that are not recited in the independent claims are described as optional components.

[0011] In addition, each drawing is a schematic diagram and is not necessarily an exact illustration. In addition, the same components are denoted by the same reference numerals in each drawing.

[0012] Furthermore, in the following embodiments, expressions such as plate-like, X-axis direction, and approximately parallel are used. For example, plate-like, X-axis direction, and approximately parallel not only mean a perfect plate, X-axis direction, and parallel, but also mean a substantial plate, X-axis direction, and parallel, i.e., with an error of a few percent. Furthermore, plate-like, X-axis direction, and approximately parallel mean a plate-like, X-axis direction, and approximately parallel direction within the range in which the effects of the present disclosure can be achieved. The same applies to other expressions using "shape," "direction," and "approximately."

[0013] In the following description, the front-to-back direction of the seat is referred to as the X-axis direction, and the up-to-down direction of the seat is referred to as the Z-axis direction. Furthermore, the left-to-right (horizontal) direction of the seat, i.e., the direction perpendicular to each of the X-axis and Z-axis directions, is referred to as the Y-axis direction. Furthermore, in the X-axis direction, the front side of the seat is referred to as the positive side, and the rear side of the seat is referred to as the negative side. Furthermore, in the Y-axis direction, the left side of FIG. 1B is referred to as the positive side, and the opposite side is referred to as the negative side. Furthermore, the right side is the right side of a person seated in the seat with respect to the direction of travel of the vehicle, and is the negative side of the Y-axis. Furthermore, the left side is the left side of a person seated in the seat with respect to the direction of travel of the vehicle, and is the positive side of the Y-axis. Furthermore, in the Z-axis direction, the upper side of the seat is referred to as the positive side, and the lower side of the seat is referred to as the negative side. The same applies to FIG. 2 and subsequent figures.

[0014] Hereinafter, the embodiments will be specifically described with reference to the drawings.

[0015] (Embodiment) [Configuration of vehicle seat air conditioning system] The configuration of a vehicle seat air-conditioning device 1 according to this embodiment will be described with reference to FIGS. 1A to 5. FIG.

[0016] Fig. 1A is a perspective view showing the appearance of a vehicle seat air-conditioning device 1 according to an embodiment, Fig. 1B is a view of the vehicle seat air-conditioning device 1 as seen from the rear, and Fig. 1C is a view of the vehicle seat air-conditioning device 1 as seen from the side.

[0017] A vehicle seat air-conditioning device 1 installed in a vehicle or the like cools or warms a person seated in a seat 10 by blowing air onto the upper body of the person from behind the person. Specifically, the vehicle seat air-conditioning device 1 draws in air from inside the vehicle and blows the drawn-in air onto the head, neck, acromion, back, and other parts of the upper body of the person seated in the seat 10, thereby cooling or warming the person's body.

[0018] A vehicle seat air-conditioning device 1 shown in FIGS. 1A to 1C includes a seat 10 and an air passage selection switch device 2 that selects an air passage through which air passes.

[0019] The seat 10 includes a seat portion 11 for a person to sit on, a seat back 13, and a headrest 15.

[0020] The seat portion 11 is a seat cushion that supports the buttocks, thighs, etc. of a person when sitting on the seat 10. The seat portion 11 has a first seat pad that corresponds to a cushioning material, and a first seat cover that covers the first seat pad.

[0021] The first seat pad is made of a cushioning material such as urethane foam. The first seat pad is a thick, approximately rectangular plate, and is disposed at a predetermined angle relative to the XY plane. The first seat cover is a cover that covers the first seat pad. The first seat cover is, for example, a leather cover, a fabric cover, or the like.

[0022] The seat back 13 is a backrest portion against which a person sitting in the seat 10 leans, supporting the person's acromion, back, and lumbar region. The seat back 13 is long along the Z-axis direction and is positioned so as to rise up relative to the seat portion 11. The seat back 13 can rotate around the Y-axis according to the person's posture, thereby adjusting the backrest angle. The seat back 13 has a second seat pad equivalent to a cushioning material and a second seat cover that covers the second seat pad.

[0023] The second seat pad is made of a cushioning material such as urethane foam. The second seat pad is a thick, substantially rectangular plate. The second seat cover is a cover that covers the second seat pad. The second seat cover is, for example, a leather cover, a fabric cover, or the like.

[0024] The seat back 13 of the seat 10 is variable in position, and its standard position is, for example, tilted at an angle of about 20 degrees relative to the Z-axis direction. However, in this embodiment, the seat back 13 is assumed to be in an almost upright position relative to the seat portion 11 along the Z-axis direction, as shown in Figure 2 described later.

[0025] FIG. 2 is a schematic diagram showing the ventilation passages and the like of the vehicle seat air-conditioning device 1. As shown in FIG.

[0026] 2, a vehicle seat 10 is provided with an air intake 20, a first outlet 21, and a second outlet 22. The figure shows an example in which a plurality of air intakes 20 and a plurality of first outlets 21 are provided in the seat 10.

[0027] The air intake 20 is an opening for drawing in air inside the vehicle. The air intake 20 is provided below a first outlet 21, which will be described later, i.e., vertically below the first outlet 21. The air intake 20 is provided in the center of the seat back 13, in an area corresponding to the back of a person sitting in the seat 10. In this example, the air intake 20 is provided in the front of the seat back 13 inside the vehicle.

[0028] The first outlet 21 is an outlet that blows air toward a person sitting in the seat 10 to cool or warm the person's body. The first outlet 21 is provided in the upper part of the seat back 13. Specifically, the first outlet 21 is provided above (in the positive direction of the Z axis) a central axis that bisects the longitudinal direction of the seat back 13 when viewed from the side (viewed along the Y axis). The first outlet 21 is provided in a region corresponding to the upper body of a person sitting in the seat 10. The upper body of a person includes, for example, the neck, head, and acromion. In this example, the first outlet 21 is provided on the front and upper surfaces of the seat back 13, which is an example of the surface of the seat 10.

[0029] The second outlet 22 is an outlet for blowing out air that has been heated through the interior of the seat 10 during the initial stage of driving when air conditioning is insufficient, for example, so as not to cause discomfort to people in the front and rear seats. The second outlet 22 is provided on the back of the seat back 13 or behind the seat portion 11. Note that behind the seat portion 11 means on the negative X-axis side of the coordinates of the seat portion 11 when compared in the front-to-rear direction (X-axis direction), and also includes, for example, behind the seat back 13. In this example, the second outlet 22 is provided on the back of the seat back 13, which is an example of the surface of the seat 10.

[0030] The second outlet port 22 is provided at a lower position than the first outlet port 21. In this example, the second outlet port 22 is provided at a lower position than the upper surface of the seat portion 11.

[0031] 1B and 1C, a ventilation path selection switching device 2 is provided on the rear surface (the surface on the negative X-axis direction side) of the seat back 13. The ventilation path selection switching device 2 is housed in a recess on the rear surface side of the seat back 13.

[0032] 2, the sheet 10 includes an intake sheet ventilation passage 120 connected to the intake port 20, a first sheet ventilation passage 121 connected to the first discharge port 21, and a second sheet ventilation passage 122 connected to the second discharge port 22. The intake sheet ventilation passage 120 is a flow path from the intake port 20 to the ventilation path selection switching device 2. The first sheet ventilation passage 121 is a flow path from the first discharge port 21 to the ventilation path selection switching device 2. The second sheet ventilation passage 122 is a flow path from the second discharge port 22 to the ventilation path selection switching device 2.

[0033] Fig. 3A is a perspective view of the ventilation channel selection switching device 2 of the vehicle seat air conditioning device 1. Fig. 3B is a perspective view of the ventilation channel selection switching device 2 as seen from a different direction than Fig. 3A.

[0034] As shown in Figures 3A and 3B, the ventilation path selection switching device 2 includes a blower 31, an intake duct ventilation path 60 connected to the intake port of the blower 31, a switching unit 70 connected to the exhaust port of the blower 31, and a first duct ventilation path 61 and a second duct ventilation path 62 connected to the switching unit 70.

[0035] As shown in Figure 2, the intake duct ventilation passage 60 is connected to the aforementioned intake sheet ventilation passage 120, the first duct ventilation passage 61 is connected to the aforementioned first sheet ventilation passage 121, and the second duct ventilation passage 62 is connected to the aforementioned second sheet ventilation passage 122.

[0036] Hereinafter, the ventilation passage formed by the intake sheet ventilation passage 120 and the intake duct ventilation passage 60 will be referred to as intake ventilation passage 40. Furthermore, the ventilation passage formed by the first sheet ventilation passage 121 and the first duct ventilation passage 61 will be referred to as first ventilation passage 51, and the ventilation passage formed by the second sheet ventilation passage 122 and the second duct ventilation passage 62 will be referred to as second ventilation passage 52. Note that if the second sheet ventilation passage 122 does not exist and the second ventilation passage 52 is formed only by the second duct ventilation passage 62, the tip of the second duct ventilation passage 62 may be directly connected to the second discharge port 22.

[0037] The intake ventilation passage 40 is an air passage that connects the intake port 20 and the blower 31, and is provided between the intake port 20 on the front surface of the seat back 13 and the intake port of the blower 31. When the blower 31 is operated, the intake ventilation passage 40 guides the air drawn in from the intake port 20 inside the vehicle to the blower 31.

[0038] The blower 31 is a device that draws in and exhausts air. An intake port of the blower 31 is connected to the intake ventilation passage 40, and an exhaust port of the blower 31 is connected to the switching unit 70. The blower 31 draws in air through the intake ventilation passage 40 and exhausts the drawn air to the switching unit 70.

[0039] If the intake duct ventilation passage 60 does not exist and the intake ventilation passage 40 is configured only by the intake sheet ventilation passage 120, the intake port of the fan 31 may be directly connected to the intake sheet ventilation passage 120. Furthermore, the fan 31 and the switching unit 70 do not need to be directly connected, and another duct-like ventilation passage may be inserted between the fan 31 and the switching unit 70.

[0040] The switching unit 70 switches the destination of the air discharged from the blower 31 between the first ventilation passage 51 and the second ventilation passage 52. The switching unit 70 is disposed between the exhaust port of the blower 31 and the first ventilation passage 51, and between the exhaust port of the blower 31 and the second ventilation passage 52.

[0041] Fig. 4 is a diagram showing the switching unit 70 of the ventilation channel selecting and switching device 2. Fig. 4 shows a cross section of the switching unit 70 taken along line IV-IV in Fig. 3A.

[0042] Fig. 4(a) shows a state in which the first ventilation passage 51 is open and the second ventilation passage 52 is closed. Fig. 4(b) shows a state in which the second ventilation passage 52 is open and the first ventilation passage 51 is closed.

[0043] The switching unit 70 has a movable plate 71 that opens and closes the first ventilation passage 51 and the second ventilation passage 52. The movable plate 71 is supported rotatably about a rotation axis that extends in the left-right direction of the vehicle. The movable plate 71 closes the opening of the first ventilation passage 51 and opens the opening of the second ventilation passage 52, thereby introducing the air sent out from the blower 31 into the second ventilation passage 52. The movable plate 71 also closes the opening of the second ventilation passage 52 and opens the opening of the first ventilation passage 51, thereby introducing the air sent out from the blower 31 into the first ventilation passage 51.

[0044] When first ventilation passage 51 is opened, movable plate 71 is retracted from the air passage of first ventilation passage 51 so as not to overlap the air passage of first ventilation passage 51. In the retracted state, movable plate 71 is arranged along the inner wall of the duct of first ventilation passage 51. In this way, switching unit 70 switches the destination of air to first ventilation passage 51 or second ventilation passage 52 based on a control command from the control unit.

[0045] FIG. 5 is a block diagram showing the vehicle seat air-conditioning device 1. As shown in FIG.

[0046] 5, the vehicle seat air-conditioning device 1 includes a blower 31, a control unit 32, a power supply unit 33, and a drive unit 34. The blower 31, the drive unit 34, and the power supply unit 33 are connected to the control unit 32. The blower 31 is a part of the configuration of the ventilation path selection switching device 2 described above.

[0047] The power supply unit 33 is a power supply circuit that supplies power to the control unit 32, the blower 31, and the drive unit 34. The power supply unit 33 is controlled by the control unit 32 to adjust the current supplied to the blower 31 and the drive unit 34.

[0048] The control unit 32 is a device that controls the driving of the blower 31 and also controls the driving of the switching unit 70. The control unit 32 controls the amount of air drawn in and the amount of air discharged (air volume) by controlling the blower 31. The control unit 32 controls the operation of the switching unit 70 by controlling the driving unit 34.

[0049] The drive unit 34 is, for example, an electric motor, and is connected to the movable plate 71 of the switching unit 70. The drive unit 34 is controlled by the control unit 32 to rotate the movable plate 71 and open and close the first ventilation passage 51 and the second ventilation passage 52.

[0050] In the vehicle seat air-conditioning device 1, the control unit 32 drives the drive unit 34 to switch the destination of the air discharged by the blower 31 to either the first air passage 51 or the second air passage 52.

[0051] The first ventilation passage 51 is an air passage that connects the switching unit 70 and the first discharge port 21. One end of the first ventilation passage 51, which is the base, is connected to the switching unit 70, and the other end, which is the tip, is connected to the first discharge port 21. The first ventilation passage 51 guides the air sent out from the blower 31 via the switching unit 70 to the first discharge port 21.

[0052] The first ventilation passage 51 discharges air sent from the blower 31 via the switching unit 70 from the first outlet 21 in at least one direction forward and diagonally forward of the seat 10. In this example, the first sheet ventilation passage 121 is arranged diagonally upward. Therefore, the air discharged from the first outlet 21 is discharged diagonally forward between the front and the upper direction. Note that the air discharged from the first outlet 21 may also be discharged diagonally forward between the front and the lower direction. The discharge direction of the air discharged from the first outlet 21 only needs to include a vector component directed forward.

[0053] The second ventilation passage 52 is an air passage that connects the switching unit 70 and the second outlet port 22. One end of the first ventilation passage 51, which is the base, is connected to the switching unit 70, and the other end, which is the tip, is connected to the second outlet port 22. The second ventilation passage 52 extends from the top to the bottom of the seat back 13 along one of the two sides of the seat back 13 that is closer to the outside of the vehicle. The second ventilation passage 52 guides the air sent out from the blower 31 via the switching unit 70 to the second outlet port 22.

[0054] Furthermore, the second ventilation passage 52 discharges the air sent from the blower 31 via the switching unit 70 from the second outlet port 22 in a direction different from the rear of the seat 10. In this example, the second ventilation passage 52 extends from top to bottom, and discharges the air introduced into the second ventilation passage 52 downward from the second outlet port 22. Note that the air discharged from the second outlet port 22 may be discharged diagonally forward between the downward and forward directions. The discharge direction of the air discharged from the second outlet port 22 does not have to include a vector component directed backward.

[0055] [Operation of vehicle seat air conditioning system] The operation of the vehicle seat air-conditioning device 1 will be described with reference to FIG.

[0056] Fig. 6 is a diagram showing the air flow in the first mode m1 and the air flow in the second mode m2 of the vehicle seat air-conditioning device 1. In Fig. 6, the air flow is indicated by arrows.

[0057] 6(a) is a mode in which air is discharged from the first outlet port 21 via the first ventilation passage 51. In the vehicle seat air conditioning device 1 in the first mode m1, air is drawn in through the air intake port 20 and introduced into the blower 31 via the intake ventilation passage 40, and the air sent out from the blower 31 is discharged from the first outlet port 21 via the switching unit 70 and the first ventilation passage 51.

[0058] 6(b) is a mode in which air is discharged from the second outlet port 22 via the second ventilation passage 52. In the second mode m2, the vehicle seat air conditioning device 1 takes in air drawn in from the air intake port 20 via the intake ventilation passage 40 into the blower 31, and discharges the air sent out from the blower 31 via the switching unit 70 and the second ventilation passage 52 from the second outlet port 22.

[0059] The vehicle seat air conditioning device 1 has the first mode m1 and the second mode m2. The control unit 32 switches between the first mode m1 and the second mode m2 by controlling the switching unit 70. For example, the control unit 32 switches between the first mode m1 and the second mode m2 by moving the movable plate 71 of the switching unit 70. In the first mode m1, the control unit 32 retracts the movable plate 71 from the air flow path of the first ventilation passage 51 (see (a) of FIG. 4).

[0060] In the following, an example will be described in which the second mode m2 is executed when the vehicle is driven, and then the first mode m1 is executed. When the second mode m2 is executed and a predetermined condition is satisfied, the control unit 32 switches from the second mode m2 to the first mode m1 and executes the first mode m1.

[0061] The case where a predetermined condition is satisfied is, for example, the case where a predetermined time has elapsed. The control unit 32 switches the blower 31 to the second mode m2 when the blower 31 starts operating, and switches the blower 31 to the first mode m1 after a predetermined time has elapsed since the blower 31 started operating. The control unit 32 may control the blower 31 so that the air volume in the second mode m2 is greater than the air volume in the first mode m1.

[0062] Specifically, the vehicle seat air conditioner 1 discharges air from the second outlet 22 at the maximum airflow rate in the initial cooling period when the vehicle is driven and the second mode m2 is started. After a predetermined time has passed and the temperature inside the vehicle has decreased, the controller 32 switches from the second mode m2 to the first mode m1. In the first mode m1 after the switch, the controller 32 discharges air from the first outlet 21 at a normal airflow rate, which is lower than the maximum airflow rate.

[0063] Furthermore, the case where a predetermined condition is satisfied refers to the case where the temperature inside the vehicle reaches a predetermined temperature. The control unit 32 switches the blower 31 to the second mode m2 when the operation of the blower 31 starts, and after switching to the second mode m2, switches to the first mode m1 when the temperature inside the vehicle reaches a predetermined temperature. For example, the control unit 32 switches to the second mode m2 when the temperature inside the vehicle is higher than a first temperature, and after switching to the second mode m2, switches to the first mode m1 when the temperature inside the vehicle falls to or below a second temperature that is lower than the first temperature. The control unit 32 may control the blower 31 so that the airflow in the second mode m2 is greater than the airflow in the first mode m1.

[0064] Specifically, the vehicle seat air-conditioning device 1 discharges air from the second outlet 22 at the maximum airflow rate in the initial cooling period when the vehicle is driven and the second mode m2 is started. The control unit 32 acquires information about the temperature inside the vehicle using a temperature sensor or the like. The temperature inside the vehicle is, for example, the temperature inside the passenger compartment, the temperature inside the seat, or the temperature near the seat. The temperature inside the vehicle may also be information indicating whether or not internal components of the vehicle are excessively hot. When the control unit 32 detects a drop in temperature, it switches from the second mode m2 to the first mode m1. In the switched first mode m1, the control unit 32 discharges air from the first outlet 21 at a normal airflow rate, which is lower than the maximum airflow rate.

[0065] Furthermore, the control unit 32 may control the blower 31 so that, when there is a person in the rear seat behind the seat 10, the amount of air discharged from the second outlet port 22 is reduced compared to when there is no person in the rear seat. The control unit 32 acquires information regarding the presence or absence of a person in the rear seat, for example, from an occupant detection unit, an in-vehicle camera, a seating sensor, or the like provided in the vehicle. In the second mode m2, the control unit 32 causes the second outlet port 22 to discharge air at a normal airflow rate when there is a person in the rear seat, and causes the second outlet port 22 to discharge air at a maximum airflow rate that is greater than the normal airflow rate when there is no person in the rear seat.

[0066] Furthermore, for example, the control unit 32 may control the amount of air drawn in through the air intake 20 and the amount of air discharged through the discharge port by controlling the blower 31 based on the temperature of the vehicle interior where the seat 10 is placed, the temperature of people present in the vehicle interior, or a control command for an air conditioning device mounted in the vehicle. The control unit 32 may acquire the temperature of the vehicle interior and the temperature of people present in the vehicle interior from a sensor mounted in the vehicle interior, and control the blower 31 accordingly. The control unit 32 may also estimate the temperature of the vehicle interior and the temperature of people present in the vehicle interior by acquiring the operating period from the start of operation of the air conditioning device mounted in the vehicle, and control the blower 31 accordingly.

[0067] Thus, the vehicle seat air conditioning device 1 includes the blower 31, an intake ventilation passage 40 that guides air drawn in from the air intake port 20 inside the vehicle when the blower 31 is operated to the blower 31, a first ventilation passage 51 that guides the air sent out from the blower 31 to a first discharge port 21 located on at least one of the front and top surfaces of the seat back 13, a second ventilation passage 52 that guides the air sent out from the blower 31 to a second discharge port 22 located on the back surface of the seat back 13 or behind the seat portion 11, and a switching unit 70 that switches the destination of the air exhausted from the blower 31 between the first ventilation passage 51 and the second ventilation passage 52. The first ventilation passage 51 discharges the air sent out from the blower 31 via the switching unit 70 from the first discharge port 21 in at least one of the forward and diagonally forward directions of the seat 10. The second ventilation passage 52 discharges the air sent from the blower 31 via the switching unit 70 from the second discharge port 22 in a direction different from the rear of the seat 10.

[0068] By providing the switching unit 70, the vehicle seat air-conditioning device 1 can switch the air discharge direction depending on the environment inside the vehicle. Therefore, for example, at the beginning of driving when cooling is insufficient, air that has been warmed by passing through the interior of the seat 10 can be discharged from the second outlet 22 located on the rear surface of the seat back 13 in a direction other than toward the rear of the seat 10. This can prevent discomfort to passengers in the front and rear seats of the vehicle.

[0069] In the above, an example has been shown in which intake ventilation passage 40 is connected to intake port 20, first ventilation passage 51 is connected to first discharge port 21, and second ventilation passage 52 is connected to second discharge port 22, but the present invention is not limited to this, and the intake port (or discharge port) and ventilation passage may be integrated. For example, the opening at the tip of intake ventilation passage 40 may be intake port 20, the opening at the tip of first ventilation passage 51 may be first discharge port 21, or the opening at the tip of second ventilation passage 52 may be second discharge port 22. The same applies hereinafter.

[0070] [Variation 1] 7A to 10, a vehicle seat air-conditioning device 1a according to a first modified example of the embodiment will be described. In the first modified example, an example in which the air intake 20 and the blower 31 are provided in the seat 11 will be described.

[0071] Fig. 7A is a perspective view showing the appearance of a vehicle seat air-conditioning device 1a in Modification 1 of the embodiment, and Fig. 7B is a view of the vehicle seat air-conditioning device 1a in Modification 1 as seen obliquely from behind.

[0072] A vehicle seat air-conditioning device 1a shown in FIGS. 7A and 7B includes a seat 10 and an air passage selection switch device 2 that selects an air passage through which air passes.

[0073] The seat 10 includes a seat portion 11 for a person to sit on, a seat back 13, and a headrest 15. Note that the seat portion 11 and the headrest 15 are not shown in Fig. 7B. Fig. 7B shows an example in which a switching unit 70 having an outer shape different from that of the embodiment is used.

[0074] FIG. 8 is a schematic diagram showing the ventilation passages and the like of the vehicle seat air-conditioning device 1a.

[0075] 8, the vehicle is provided with an intake port 20, a first outlet port 21, and a second outlet port 22. The intake port 20 of the first modification example is made up of a first intake port 20a and a second intake port 20b.

[0076] The first air intake port 20a is an air intake port for an air conditioner. The first air intake port 20a is provided below the first air discharge port 21, i.e., vertically below the first air discharge port 21. The first air intake port 20a is provided below the seat 11 inside the vehicle. The first air intake port 20a is capable of taking in air from inside the vehicle.

[0077] The first air intake port 20a may be disposed to face an outlet (for example, a duct in a center console) of an HVAC (Heating Ventilation and Air Conditioning) device mounted on the vehicle. In other words, the first air intake port 20a may be capable of drawing in cold air or warm air sent from the HVAC device.

[0078] The second air intake port 20b is an opening for drawing in air inside the vehicle. The second air intake port 20b is provided below the first air discharge port 21, i.e., vertically below the first air discharge port 21. The second air intake port 20b is provided in the center of the seat 11, in an area corresponding to the buttocks and thighs of a person sitting in the seat 10. In this example, the second air intake port 20b is provided on the upper surface of the seat 11 inside the vehicle.

[0079] The first outlet 21 is an outlet that cools or warms the body of a person seated in the seat 10 by blowing air toward the person. The first outlet 21 is provided in the upper part of the seat back 13, as in the embodiment.

[0080] The second outlet 22 is an outlet for blowing out air that has been heated through the interior of the seat 10 during the early stages of driving when the air conditioning is insufficient, without causing discomfort to occupants in the front and rear seats. As in the embodiment, the second outlet 22 is provided on the back of the seat back 13 or behind the seat portion 11. The second outlet 22 is also provided at a lower position than the first outlet 21. In this example, the second outlet 22 is provided on the back of the seat back 13, at a lower position than the top surface of the seat portion 11.

[0081] 7B and 8, the seat portion 11 of the seat 10 is provided with an air-flow path selection switching device 2. The air-flow path selection switching device 2 is housed in a recess on the bottom surface side of the seat portion 11.

[0082] As shown in Figure 8, the vehicle seat air conditioning device 1a includes a first air intake ventilation passage 120a connected to the first air intake port 20a, a second air intake ventilation passage 120b connected to the second air intake port 20b, a first seat ventilation passage 121 connected to the first outlet port 21, and a second seat ventilation passage 122 connected to the second outlet port 22.

[0083] The first intake ventilation passage 120a is a flow path from the first intake port 20a to the ventilation path selection switching device 2. The second intake ventilation passage 120b is a flow path from the second intake port 20b to the ventilation path selection switching device 2. The first sheet ventilation passage 121 is a flow path from the first discharge port 21 to the ventilation path selection switching device 2. The second sheet ventilation passage 122 is a flow path from the second discharge port 22 to the ventilation path selection switching device 2.

[0084] Fig. 9 is a perspective view of the blower 31 of the vehicle seat air-conditioning device 1a, with a part of the blower 31 separated on the upper side.

[0085] As shown in Figures 8 and 9, the ventilation path selection switching device 2 includes a blower 31, a switching valve 75 connected to the intake port of the blower 31, a switching unit 70 connected to the exhaust port of the blower 31, and a first duct ventilation path 61 and a second duct ventilation path 62 connected to the switching unit 70.

[0086] As shown in Figure 8, the switching valve 75 is connected to the first intake ventilation passage 120a and the second intake ventilation passage 120b described above, the first duct ventilation passage 61 is connected to the first sheet ventilation passage 121 described above, and the second duct ventilation passage 62 is connected to the second sheet ventilation passage 122 described above.

[0087] Hereinafter, the ventilation passage formed by first intake-air passage 120a and second intake-air passage 120b will be referred to as intake-air passage 40. Furthermore, the ventilation passage formed by first sheet-air passage 121 and first duct-air passage 61 will be referred to as first ventilation passage 51, and the ventilation passage formed by second sheet-air passage 122 and second duct-air passage 62 will be referred to as second ventilation passage 52. Note that if second sheet-air passage 122 does not exist and second ventilation passage 52 is formed only by second duct-air passage 62, the tip of second duct-air passage 62 may be directly connected to second outlet 22.

[0088] The intake ventilation passage 40 is an air passage that connects the first air intake port 20a and the switching valve 75, and also connects the second air intake port 20b and the switching valve 75. The intake ventilation passage 40 is provided between the first air intake port 20a located below the seat 11 and the switching valve 75, and between the second air intake port 20b on the upper surface of the seat 11 and the switching valve 75. When the blower 31 is operated, the intake ventilation passage 40 guides air drawn in from the air intake port 20 inside the vehicle to the blower 31 via the switching valve 75.

[0089] The switching valve 75 is a valve that switches the flow path of air to be sucked by the blower 31 between the first intake-air passage 120a and the second intake-air passage 120b. The switching valve 75 is disposed between the suction port of the blower 31 and the first intake-air passage 120a, and between the suction port of the blower 31 and the second intake-air passage 120b. The control unit 32 controls a drive unit (not shown) different from the drive unit 34 to control the opening and closing of the switching valve 75.

[0090] The blower 31 is a blower that draws in and exhausts air. An intake port of the blower 31 is connected to the switching valve 75, and an exhaust port of the blower 31 is connected to the switching unit 70. The blower 31 draws in air through the intake ventilation passage 40 and the switching valve 75, and exhausts the drawn air to the switching unit 70.

[0091] It should be noted that the blower 31 and the switching unit 70 do not need to be directly connected, and another duct-like ventilation passage may be inserted between the blower 31 and the switching unit 70.

[0092] The switching unit 70 switches the destination of the air discharged from the blower 31 between the first ventilation passage 51 and the second ventilation passage 52. The switching unit 70 is disposed between the exhaust port of the blower 31 and the first ventilation passage 51, and between the exhaust port of the blower 31 and the second ventilation passage 52. The vehicle seat air conditioning device 1a causes the control unit 32 to drive the drive unit 34 of the switching unit 70, thereby switching the destination of the air discharged by the blower 31 between the first ventilation passage 51 and the second ventilation passage 52.

[0093] The first ventilation passage 51 is an air passage that connects the switching unit 70 and the first discharge port 21. As in the embodiment, the first ventilation passage 51 guides the air sent out from the blower 31 via the switching unit 70 to the first discharge port 21. The first ventilation passage 51 discharges the air sent out from the blower 31 from the first discharge port 21 in at least one direction forward and diagonally forward of the seat 10.

[0094] The second ventilation passage 52 is an air passage that connects the switching unit 70 and the second discharge port 22. As in the embodiment, the second ventilation passage 52 guides the air sent out from the blower 31 via the switching unit 70 to the second discharge port 22. Furthermore, the second ventilation passage 52 discharges the air sent out from the blower 31 via the switching unit 70 from the second discharge port 22 in a direction different from the rear of the seat 10. In this example, the second ventilation passage 52 extends from top to bottom, and discharges the air introduced into the second ventilation passage 52 downward from the second discharge port 22.

[0095] Next, the operation of the vehicle seat air-conditioning device 1a of the first modified example will be described.

[0096] FIG. 10 is a diagram showing the air flow in the first mode m1 and the air flow in the second mode m2 of the vehicle seat air-conditioning device 1a.

[0097] 10(a) is a mode in which air is discharged from the first outlet port 21 via the first ventilation passage 51. In the first mode m1, the vehicle seat air conditioning device 1a takes in air drawn in from the first air intake port 20a via the intake ventilation passage 40 and the switching valve 75 into the blower 31, and discharges the air sent out from the blower 31 via the switching unit 70 and the first ventilation passage 51 from the first outlet port 21.

[0098] 10(b) is a mode in which air is discharged from the second outlet port 22 via the second ventilation passage 52. In the second mode m2, the vehicle seat air conditioning device 1a takes in air drawn in from the second air intake port 20b via the intake ventilation passage 40 and the switching valve 75 into the blower 31, and discharges the air sent out from the blower 31 via the switching unit 70 and the second ventilation passage 52 from the second outlet port 22.

[0099] The vehicle seat air conditioning device 1a has the first mode m1 and the second mode m2. The control unit 32 switches between the first mode m1 and the second mode m2 by controlling the switching unit 70 and the switching valve 75. For example, the control unit 32 switches between the first mode m1 and the second mode m2 by moving the movable plate 71 of the switching unit 70 and the movable plate (not shown) of the switching valve 75.

[0100] In the following modified example, the second mode m2 is executed when the vehicle is driven, and then the first mode m1 is executed. When the second mode m2 is executed and a predetermined condition is satisfied, the control unit 32 switches from the second mode m2 to the first mode m1 and executes the first mode m1.

[0101] The case where a predetermined condition is satisfied is, for example, the case where a predetermined time has elapsed. The control unit 32 switches the blower 31 to the second mode m2 when the blower 31 starts operating, and switches the blower 31 to the first mode m1 after a predetermined time has elapsed since the blower 31 started operating. The control unit 32 may control the blower 31 so that the air volume in the second mode m2 is greater than the air volume in the first mode m1.

[0102] Specifically, when the vehicle is driven and second mode m2 is initiated during the initial cooling operation, vehicle seat air-conditioning device 1a draws in air through second air intake port 20b and discharges the drawn-in air at a maximum airflow rate through second outlet port 22. After a predetermined time has passed and the temperature inside the vehicle has decreased, controller 32 switches from second mode m2 to first mode m1. In the switched-to first mode m1, controller 32 draws in air through first air intake port 20a and discharges the drawn-in air at a normal airflow rate through first outlet port 21.

[0103] Furthermore, the case where a predetermined condition is satisfied refers to the case where the temperature inside the vehicle reaches a predetermined temperature. The control unit 32 switches the blower 31 to the second mode m2 when the operation of the blower 31 starts, and after switching to the second mode m2, switches to the first mode m1 when the temperature inside the vehicle reaches a predetermined temperature. For example, the control unit 32 switches to the second mode m2 when the temperature inside the vehicle is higher than a first temperature, and after switching to the second mode m2, switches to the first mode m1 when the temperature inside the vehicle falls to or below a second temperature that is lower than the first temperature. The control unit 32 may control the blower 31 so that the airflow in the second mode m2 is greater than the airflow in the first mode m1.

[0104] Specifically, when the vehicle is driven and second mode m2 is initiated in the initial cooling stage, vehicle seat air conditioner 1a draws in air through second air intake port 20b and discharges the drawn-in air at the maximum airflow rate from second outlet port 22. When controller 32 detects a temperature drop, it switches from second mode m2 to first mode m1. In the switched-to first mode m1, controller 32 draws in air through first air intake port 20a and discharges the drawn-in air at a normal airflow rate from first outlet port 21.

[0105] As described above, the vehicle seat air conditioning device 1a includes the switching valve 75, the blower 31, the intake ventilation passage 40, the first ventilation passage 51, the second ventilation passage 52, and the switching unit 70. The first ventilation passage 51 discharges air sent from the blower 31 via the switching unit 70 through the switching valve 75 from the first outlet port 21 in at least one direction forward and diagonally forward of the seat 10. The second ventilation passage 52 discharges air sent from the blower 31 via the switching unit 70 through the switching valve 75 from the second outlet port 22 in a direction different from the rear of the seat 10.

[0106] The vehicle seat air-conditioning device 1a, equipped with the switching unit 70, can switch the air discharge direction depending on the vehicle interior environment. Therefore, for example, during the early stages of driving when cooling is insufficient, air that has passed through the interior of the seat 10 and been warmed can be discharged from the second outlet 22 located on the rear surface of the seat back 13 in a direction other than toward the rear of the seat 10. This reduces discomfort felt by occupants in the front and rear seats of the vehicle. Furthermore, after cooling stabilizes, the blower 31 draws in conditioned air from the vehicle interior or air conditioned by the HVAC system and discharges it from the first outlet 21 in at least one direction forward and diagonally forward of the seat 10, thereby improving the comfort of occupants of the seat 10 when cooling stabilizes.

[0107] [Variation 2] 11 to 14, a vehicle seat air-conditioning device 1b according to a second modification of the embodiment will be described. In the second modification, an example will be described in which the blower 31 is configured by a first blower 31a provided in the seat portion 11 and a second blower 31b provided in the seat back 13.

[0108] FIG. 11 is a perspective view showing the appearance of a vehicle seat air-conditioning device 1b according to the second modification of the embodiment.

[0109] A vehicle seat air-conditioning device 1b shown in FIG. 11 includes a seat 10 and an air-flow path selection switch device 2 that selects an air-flow path through which air passes.

[0110] FIG. 12 is a block diagram showing a vehicle seat air-conditioning device 1b.

[0111] 12, the vehicle seat air-conditioning device 1b includes a first fan 31a, a second fan 31b, a control unit 32, a power supply unit 33, and a drive unit 34. The first fan 31a, the second fan 31b, the drive unit 34, and the power supply unit 33 are connected to the control unit 32.

[0112] The seat 10 includes a seat portion 11 for a person to sit on, a seat back 13, and a headrest 15.

[0113] FIG. 13 is a schematic diagram showing the ventilation passages and the like of the vehicle seat air-conditioning device 1b.

[0114] As shown in FIG. 13, the vehicle is provided with an intake port 20 in the seat portion 11, an intake port 20 in the seat back 13, a first discharge port 21, and a second discharge port 22.

[0115] The air intake port of the seat portion 11 is similar to the air intake port 20 of the first modified example, i.e., the first air intake port 20a and the second air intake port 20b. The air intake port 20 of the seat back 13 is similar to the air intake port 20 of the embodiment. Furthermore, the configurations of the first outlet port 21 and the second outlet port 22 are similar to those of the first modified example.

[0116] Hereinafter, the ventilation passage formed by the first intake ventilation passage 120a, the second intake ventilation passage 120b, the intake sheet ventilation passage 120, and the intake duct ventilation passage 60 will be referred to as the intake ventilation passage 40. The ventilation passage formed by the first sheet ventilation passage 121 and the first duct ventilation passage 61 will be referred to as the first ventilation passage 51, and the ventilation passage formed by the second sheet ventilation passage 122 and the second duct ventilation passage 62 will be referred to as the second ventilation passage 52.

[0117] The intake ventilation passage 40 is an air passage connecting the first air intake port 20a of the seat 11 and the switching valve 75, an air passage connecting the second air intake port 20b of the seat 11 and the switching valve 75, and an air passage connecting the air intake port 20 of the seat back 13 and the second blower 31b. The intake ventilation passage 40 is provided between the first air intake port 20a on the underside of the seat 11 and the switching valve 75, between the second air intake port 20b on the upper surface of the seat 11 and the switching valve 75, and between the air intake port 20 on the front surface of the seat back 13 and the intake port of the second blower 31b. When the blower 31 is operated, the intake ventilation passage 40 guides air drawn in from the air intake port 20 inside the vehicle to the blower 31 via the switching valve 75.

[0118] The switching valve 75 is a valve that switches the flow path of air to be sucked by the first fan 31a between the first intake-air passage 120a and the second intake-air passage 120b. The switching valve 75 is disposed between the suction port of the first fan 31a and the first intake-air passage 120a, and between the suction port of the first fan 31a and the second intake-air passage 120b. The control unit 32 controls a drive unit (not shown) different from the drive unit 34 to control the opening and closing of the switching valve 75.

[0119] The first fan 31a is a fan that draws in and exhausts air. The first fan 31a is provided in the seat 11. The intake port of the first fan 31a is connected to the switching valve 75, and the exhaust port of the first fan 31a is connected to the intake port of the second fan 31b via a relay duct 65 provided along the seat 11 and the seat back 13. The first fan 31a draws in air through the intake ventilation passage 40 of the seat 11 and sends the drawn air to the second fan 31b.

[0120] The second fan 31b is a fan that draws in and exhausts air. The second fan 31b is provided in the seat back 13. The intake port of the second fan 31b is connected to the exhaust port of the first fan 31a via the relay duct 65, and the exhaust port of the second fan 31b is connected to the switching unit 70. The second fan 31b draws in air sent out from the first fan 31a via the relay duct 65, and also draws in air through the intake ventilation path 40 of the seat back 13, and discharges the drawn in air to the switching unit 70.

[0121] The switching unit 70 switches the destination of the air discharged from the second fan 31b between the first ventilation passage 51 and the second ventilation passage 52. The switching unit 70 is disposed between the exhaust port of the second fan 31b and the first ventilation passage 51, and between the exhaust port of the second fan 31b and the second ventilation passage 52.

[0122] In the vehicle seat air-conditioning device 1b, the control unit 32 drives the drive unit 34 of the switching unit 70 to switch the destination of the air discharged by the second blower 31b to either the first air passage 51 or the second air passage 52.

[0123] The first ventilation passage 51 is an air passage that connects the switching unit 70 and the first discharge port 21. The first ventilation passage 51 guides the air sent out from the second fan 31b via the switching unit 70 to the first discharge port 21. The first ventilation passage 51 discharges the air sent out from the second fan 31b from the first discharge port 21 in at least one direction forward and diagonally forward of the seat 10.

[0124] The second ventilation passage 52 is an air passage that connects the switching unit 70 and the second discharge port 22. The second ventilation passage 52 guides the air sent out from the second fan 31b via the switching unit 70 to the second discharge port 22. The second ventilation passage 52 also discharges the air sent out from the second fan 31b via the switching unit 70 from the second discharge port 22 in a direction different from the rear of the seat 10. In this example, the second ventilation passage 52 extends from top to bottom, and discharges the air introduced into the second ventilation passage 52 downward from the second discharge port 22.

[0125] Next, the operation of the vehicle seat air-conditioning device 1b of the second modified example will be described.

[0126] FIG. 14 is a diagram showing the air flow in the first mode m1 and the air flow in the second mode m2 of the vehicle seat air-conditioning device 1b.

[0127] 14(a) is a mode in which air is discharged from the first outlet port 21 via the first ventilation passage 51. In the first mode m1, the vehicle seat air conditioning device 1b takes in air drawn in from the first air intake port 20a of the seat 11 into the first fan 31a via the intake ventilation passage 40, and discharges the air sent out from the first fan 31a via the second fan 31b, the switching unit 70, and the first ventilation passage 51 from the first outlet port 21.

[0128] 14(b) is a mode in which air is discharged from the second outlet port 22 via the second ventilation passage 52. In the second mode m2, the vehicle seat air conditioning device 1b draws air from the second air intake port 20b of the seat 11 into the first fan 31a via the air intake ventilation passage 40 of the seat 11 and sends it to the second fan 31b. The vehicle seat air conditioning device 1b also draws air from the air intake port 20 of the seat back 13 into the second fan 31b via the air intake ventilation passage 40 of the seat back 13. The air sent out from the first fan 31a and the second fan 31b is then discharged from the second outlet port 22 via the switching unit 70 and the second ventilation passage 52.

[0129] The vehicle seat air-conditioning device 1b has the first mode m1 and the second mode m2. The control unit 32 switches between the first mode m1 and the second mode m2 by controlling the switching unit 70 and the switching valve 75. For example, the control unit 32 switches between the first mode m1 and the second mode m2 by moving the movable plate 71 of the switching unit 70 and the movable plate of the switching valve 75.

[0130] When the second mode m2 is executed and a predetermined condition is satisfied, the control unit 32 switches from the second mode m2 to the first mode m1 and executes the first mode m1.

[0131] The case where a predetermined condition is satisfied refers to the case where a predetermined time has elapsed, for example. The control unit 32 switches the first fan 31a and the second fan 31b to the second mode m2 when the first fan 31a and the second fan 31b start operating, and switches to the first mode m1 after a predetermined time has elapsed since the first fan 31a and the second fan 31b started operating. The control unit 32 may control the first fan 31a and the second fan 31b so that the air volume in the second mode m2 is greater than the air volume in the first mode m1.

[0132] Specifically, when the vehicle is driven and second mode m2 is initiated, vehicle seat air-conditioning device 1b draws air through second air intake port 20b of seat 11 using first fan 31a and through air intake port 20 of seat back 13 using second fan 31b, and discharges the drawn air at a maximum airflow rate through second outlet port 22. When the temperature inside the vehicle drops after a predetermined time has elapsed, control unit 32 switches from second mode m2 to first mode m1. In the switched-to first mode m1, control unit 32 draws air through first air intake port 20a of seat 11 and discharges the drawn air at a normal airflow rate through first outlet port 21 via second fan 31b and other fans.

[0133] Furthermore, the case where a predetermined condition is satisfied refers to the case where the temperature inside the vehicle reaches a predetermined temperature. The control unit 32 switches the fan 31 to the second mode m2 when the fan 31 starts operating, and after switching to the second mode m2, switches to the first mode m1 when the temperature inside the vehicle reaches a predetermined temperature. For example, the control unit 32 switches to the second mode m2 when the temperature inside the vehicle is higher than a first temperature, and after switching to the second mode m2, switches to the first mode m1 when the temperature inside the vehicle falls to or below a second temperature that is lower than the first temperature. The control unit 32 may control the first fan 31a and the second fan 31b so that the airflow in the second mode m2 is greater than the airflow in the first mode m1.

[0134] Specifically, when the vehicle is driven and second mode m2 is initiated, vehicle seat air-conditioning device 1b draws air through second air intake port 20b using first fan 31a and through air intake port 20 of seat back 13 using second fan 31b, and discharges the drawn air at a maximum airflow rate through second outlet port 22. When controller 32 detects a temperature drop, it switches from second mode m2 to first mode m1. In the switched first mode m1, controller 32 draws air through first air intake port 20a of seat 11 and discharges the drawn air at a normal airflow rate through first outlet port 21 via second fan 31b and other fans.

[0135] As described above, vehicle seat air conditioning device 1b includes switching valve 75, blower 31 having first blower 31a and second blower 31b, intake ventilation passage 40, first ventilation passage 51, second ventilation passage 52, and switching unit 70. First ventilation passage 51 discharges air sent from blower 31 via switching valve 75 and switching unit 70 from first outlet 21 in at least one direction forward and diagonally forward of seat 10. Second ventilation passage 52 discharges air sent from blower 31 via switching unit 70 via switching valve 75 from second outlet 22 in a direction different from the rear of seat 10.

[0136] The vehicle seat air-conditioning device 1b, equipped with the switching unit 70, can switch the air discharge direction depending on the vehicle interior environment. Therefore, for example, during the early stages of driving when cooling is insufficient, air that has passed through the interior of the seat 10 and been warmed can be discharged from the second outlet 22 located on the rear surface of the seat back 13 in a direction other than toward the rear of the seat 10. This reduces discomfort felt by occupants in the front and rear seats of the vehicle. Furthermore, after cooling stabilizes, the blower 31 draws in conditioned air from the vehicle interior or air conditioned by the HVAC system and discharges it from the first outlet 21 in at least one direction forward and diagonally forward of the seat 10, thereby improving the comfort of occupants of the seat 10 when cooling stabilizes.

[0137] [Variation 3] A vehicle seat air-conditioning device 1c according to a third modification of the embodiment will be described with reference to Figures 15 and 16. In the third modification, an example in which the blower 31 is composed of a first blower 31a and a second blower 31b will be described.

[0138] The vehicle seat air-conditioning device 1c includes a seat 10 and a ventilation path selection switch 2 that selects a ventilation path through which air passes. The vehicle seat air-conditioning device 1c also includes a first fan 31a, a second fan 31b, a control unit 32, a power supply unit 33, and a drive unit 34.

[0139] FIG. 15 is a schematic diagram showing the ventilation passages and the like of the vehicle seat air-conditioning device 1c.

[0140] As shown in FIG. 15, the vehicle is provided with an air intake 20 in the seat back 13, an air intake 20 in the seat portion 11, a first outlet 21, and a second outlet 22.

[0141] The air intake 20 of the seat back 13 is similar to the air intake 20 of the embodiment. The air intake 20 of the seat portion 11 is similar to the second air intake 20b of the seat portion 11. In addition, the configurations of the first discharge port 21 and the second discharge port 22 are similar to those of the first modified example.

[0142] Hereinafter, the ventilation passage formed by the second intake ventilation passage 120b, the intake sheet ventilation passage 120, and the intake duct ventilation passage 60 will be referred to as the intake ventilation passage 40. The ventilation passage formed by the first sheet ventilation passage 121 and the first duct ventilation passage 61 will be referred to as the first ventilation passage 51, and the ventilation passage formed by the second sheet ventilation passage 122 and the second duct ventilation passage 62 will be referred to as the second ventilation passage 52.

[0143] The intake ventilation passage 40 is an air passage that connects the air intake port 20 of the seat portion 11 and the first fan 31a, and also connects the air intake port 20 of the seat back 13 and the second fan 31b. The intake ventilation passage 40 is provided between the air intake port 20 on the upper surface of the seat portion 11 and the intake port of the first fan 31a, and between the air intake port 20 on the front surface of the seat back 13 and the intake port of the second fan 31b. When the fan 31 is operated, the intake ventilation passage 40 guides the air drawn in through these air intake ports 20 to the fan 31.

[0144] The first fan 31a is a device that draws in and exhausts air. The first fan 31a is provided in the seat 11. The intake port of the first fan 31a is connected to the intake ventilation passage 40 of the seat 11, and the exhaust port of the first fan 31a is connected to the intake port of the second fan 31b via the relay duct 65. The first fan 31a draws air from the intake port 20 of the seat 11 through the intake ventilation passage 40 and exhausts the drawn air to the second fan 31b.

[0145] The second fan 31b is a fan that draws in and exhausts air. The second fan 31b is provided in the seat back 13. An intake port of the second fan 31b is connected to the intake ventilation passage 40 of the seat back 13 and the relay duct 65, and an exhaust port of the second fan 31b is connected to the switching unit 70. The second fan 31b draws in air sent out from the first fan 31a via the relay duct 65, and also draws in air via the intake ventilation passage 40 of the seat back 13, and discharges the drawn in air to the switching unit 70.

[0146] The switching unit 70 switches the destination of the air discharged from the fan 31 between the first ventilation passage 51 and the second ventilation passage 52. The switching unit 70 is disposed between the exhaust port of the second fan 31b and the first ventilation passage 51, and between the exhaust port of the second fan 31b and the second ventilation passage 52.

[0147] In the vehicle seat air-conditioning device 1c, the control unit 32 drives the drive unit 34 of the switching unit 70 to switch the destination of the air discharged by the second blower 31b to either the first air passage 51 or the second air passage 52. The configurations of the first air passage 51 and the second air passage 52 are the same as those in the second modification.

[0148] Next, the operation of the vehicle seat air-conditioning device 1c of the third modified example will be described.

[0149] FIG. 16 is a diagram showing the air flow in the first mode m1 and the air flow in the second mode m2 of the vehicle seat air-conditioning device 1c.

[0150] 16(a) is a mode in which air is discharged from the first outlet port 21 via the first ventilation passage 51. In the first mode m1, the vehicle seat air conditioning device 1c draws air from the second air intake port 20b (air intake port 20) of the seat portion 11 into the first fan 31a via the air intake ventilation passage 40 of the seat portion 11, and sends it out from the first fan 31a. In addition, the vehicle seat air conditioning device 1c draws air from the air intake port 20 of the seat back 13 into the second fan 31b via the air intake ventilation passage 40 of the seat back 13, and sends it out from the second fan 31b. The air sent out from the first fan 31a and the second fan 31b is then discharged from the first outlet port 21 via the switching unit 70 and the first ventilation passage 51.

[0151] The second mode m2 shown in FIG. 16(b) is a mode in which air is discharged from the second outlet port 22 via the second ventilation passage 52. In the second mode m2, the vehicle seat air conditioning device 1c draws air from the second air intake port 20b (air intake port 20) of the seat portion 11 into the first fan 31a via the air intake ventilation passage 40 of the seat portion 11 and discharges it from the first fan 31a. The vehicle seat air conditioning device 1c also draws air from the air intake port 20 of the seat back 13 into the second fan 31b via the air intake ventilation passage 40 of the seat back 13 and discharges it from the second fan 31b. The air discharged from the first fan 31a and the second fan 31b is then discharged from the second outlet port 22 via the switching unit 70 and the second ventilation passage 52.

[0152] The vehicle seat air-conditioning device 1c has the first mode m1 and the second mode m2. The control unit 32 switches between the first mode m1 and the second mode m2 by controlling the switching unit 70. For example, the control unit 32 switches between the first mode m1 and the second mode m2 by moving the movable plate 71 of the switching unit 70.

[0153] When the second mode m2 is executed and a predetermined condition is satisfied, the control unit 32 switches from the second mode m2 to the first mode m1 and executes the first mode m1.

[0154] The case where a predetermined condition is satisfied refers to the case where a predetermined time has elapsed, for example. The control unit 32 switches the mode to the second mode m2 when the operation of the fans 31 (first fan 31a and second fan 31b) starts, and switches to the first mode m1 after a predetermined time has elapsed since the operation of the fans 31 started. The control unit 32 may control the first fan 31a and the second fan 31b so that the air volume in the second mode m2 is greater than the air volume in the first mode m1.

[0155] Specifically, when the vehicle is driven and second mode m2 is initiated, vehicle seat air-conditioning device 1c uses first fan 31a to draw air through second air intake port 20b of seat 11 and second fan 31b to draw air through air intake port 20 of seat back 13, and discharges the drawn air at a maximum airflow rate from second outlet port 22. When the temperature inside the vehicle drops after a predetermined time has elapsed, controller 32 switches from second mode m2 to first mode m1. In the switched-to first mode m1, controller 32 discharges the air drawn through second air intake port 20b of seat 11 and air drawn through air intake port 20 of seat back 13 at a normal airflow rate from first outlet port 21.

[0156] Furthermore, the case where a predetermined condition is satisfied refers to the case where the temperature inside the vehicle reaches a predetermined temperature. The control unit 32 switches to the second mode m2 when the first fan 31a and the second fan 31b start operating, and after switching to the second mode m2, switches to the first mode m1 when the temperature inside the vehicle reaches a predetermined temperature. For example, the control unit 32 switches to the second mode m2 when the temperature inside the vehicle is higher than a first temperature, and after switching to the second mode m2, switches to the first mode m1 when the temperature inside the vehicle falls to or below a second temperature that is lower than the first temperature. The control unit 32 may control the first fan 31a and the second fan 31b so that the airflow in the second mode m2 is greater than the airflow in the first mode m1.

[0157] Specifically, in the initial cooling stage when the vehicle is driven and second mode m2 is initiated, the vehicle seat air-conditioning device 1c uses the first fan 31a to draw air through the second air intake 20b (air intake 20) and the second fan 31b to draw air through the air intake 20 of the seat back 13, and discharges the drawn air at a maximum airflow rate from the second air outlet 22. When the control unit 32 detects a temperature drop, it switches from the second mode m2 to the first mode m1. In the switched first mode m1, the control unit 32 discharges the air drawn through the second air intake 20b of the seat 11 and the air drawn through the air intake 20 of the seat back 13 from the first air outlet 21 at a normal airflow rate.

[0158] As described above, the vehicle seat air conditioning device 1c includes the blower 31 having the first blower 31a and the second blower 31b, the intake ventilation passage 40, the first ventilation passage 51, the second ventilation passage 52, and the switching unit 70. The first ventilation passage 51 discharges air sent from the blower 31 via the switching unit 70 from the first outlet 21 in at least one direction forward and diagonally forward of the seat 10. The second ventilation passage 52 discharges air sent from the blower 31 via the switching unit 70 from the second outlet 22 in a direction different from the rear of the seat 10.

[0159] The vehicle seat air-conditioning device 1c, equipped with the switching unit 70, can switch the air discharge direction depending on the vehicle environment. Therefore, for example, during the early stages of driving when cooling is insufficient, air that has passed through the interior of the seat 10 and been heated can be discharged from the second outlet 22 located on the rear surface of the seat back 13 in a direction other than toward the rear of the seat 10. This reduces discomfort felt by passengers in the front and rear seats of the vehicle. Furthermore, in the second mode m2, the first fan 31a can draw air from the seat portion 11, and the second fan 31b can draw air from the seat back 13, so that the air heated inside the seat 10 can be discharged more quickly.

[0160] [Variation 4] 17 and 18, a vehicle seat air-conditioning device 1d according to a fourth modification of the embodiment will be described. In the fourth modification, the second outlet port 22 is provided on the side of the seat portion 11, and air is discharged forward from the second outlet port 22.

[0161] The vehicle seat air-conditioning device 1d includes a seat 10 and a ventilation path selection switch 2 that selects a ventilation path through which air passes. The vehicle seat air-conditioning device 1d also includes a blower 31, a control unit 32, a power supply unit 33, and a drive unit 34.

[0162] Figure 17 is a rear view of the vehicle seat air-conditioning device 1d, and Figure 18 is a side view of the vehicle seat air-conditioning device 1d.

[0163] The seat 10 is provided with an intake port 20, a first outlet port 21, and a second outlet port 22.

[0164] The intake port 20 is a suction port of the seat back 13, and is the same as in the embodiment. The first discharge port 21 is the same as in the embodiment. The second discharge port 22 is provided on each of the two lateral sides of the seat portion 11 (see FIG. 17).

[0165] The intake ventilation passage 40 is an air passage that connects the air intake port 20 of the seat back 13 and the blower 31. The intake ventilation passage 40 is provided between the air intake port 20 on the front surface of the seat back 13 and the intake port of the blower 31. When the blower 31 is operated, the intake ventilation passage 40 guides the air drawn in from the air intake port 20 inside the vehicle to the blower 31.

[0166] The blower 31 is a device that draws in and exhausts air. The blower 31 is provided in the seat back 13. An intake port of the blower 31 is connected to the intake ventilation passage 40, and an exhaust port of the blower 31 is connected to the switching unit 70. The blower 31 draws in air through the intake ventilation passage 40 and exhausts the drawn air to the switching unit 70.

[0167] The switching unit 70 is a switching valve that switches the destination of the air discharged from the blower 31 between the first ventilation passage 51 and the second ventilation passage 52. The switching unit 70 is disposed between the exhaust port of the blower 31 and the first ventilation passage 51, and between the exhaust port of the blower 31 and the second ventilation passage 52.

[0168] In the vehicle seat air-conditioning device 1d, the control unit 32 drives the drive unit 34 of the switching unit 70 to switch the destination of the air discharged by the blower 31 to either the first air passage 51 or the second air passage 52.

[0169] The first ventilation passage 51 is the same as in the embodiment.

[0170] The second ventilation passage 52 is an air passage connecting the switching unit 70 and the second outlet port 22. One end of the first ventilation passage 51, which is the base, is connected to the switching unit 70, and the other end, which is the tip, is connected to the second outlet port 22. The second ventilation passage 52 extends from the upper part to the lower part of the seat back 13 along one of the two sides of the seat back 13 that is closest to the outside of the vehicle, and then branches off midway to extend along both sides of the seat 10. The second ventilation passage 52 is formed by a tubular pipe so that the seat back 13 can be reclined. The second ventilation passage 52 guides air sent from the blower 31 via the switching unit 70 to the second outlet port 22. The tip of the second outlet port 22 is formed in a nozzle shape. The second outlet port 22 is positioned so that the tip of the nozzle is flush with the front surface of the seat back 13 or is located behind the front surface of the seat back 13.

[0171] The second ventilation passage 52 discharges the air sent out from the blower 31 via the switching unit 70 from the second outlet port 22 in a direction different from the rear of the seat 10. In this example, the second ventilation passage 52 discharges the air sent out from the blower 31 via the switching unit 70 forward from the second outlet port 22. The air discharged forward from each of the two sides of the seat 11 passes through both sides of the seat 11 so as not to directly hit the feet of the person in the front seat.

[0172] As described above, the vehicle seat air conditioning device 1d includes the blower 31, the intake ventilation passage 40, the first ventilation passage 51, the second ventilation passage 52, and the switching unit 70. The first ventilation passage 51 discharges air sent out from the blower 31 via the switching unit 70 from the first outlet port 21 in at least one direction forward and diagonally forward of the seat 10. The second ventilation passage 52 discharges air sent out from the blower 31 via the switching unit 70 from the second outlet port 22 in a direction different from the rear of the seat 10.

[0173] The vehicle seat air-conditioning device 1d is equipped with the above-described switching unit 70, which allows it to switch the air discharge direction depending on the environment inside the vehicle. Therefore, for example, at the beginning of driving when cooling is insufficient, air that has been warmed by passing through the interior of the seat 10 can be discharged from the second discharge port 22 located to the side of the seat portion 11 in a direction other than toward the rear of the seat 10. This makes it possible to prevent discomfort to passengers in the front and rear seats of the vehicle.

[0174] Furthermore, by forming the second outlet 22 into a nozzle shape and arranging it in a direction toward both side surfaces of the seat 11, the air discharged from the second outlet 22 can be blown into the gaps between the seat and the doors or the center console. This makes it possible to push dust and dirt accumulated in the gaps toward the front of the vehicle. Furthermore, by forming the second outlet 22 into a nozzle shape, the ejector effect increases the air volume, making it possible to efficiently push out dust and dirt. Air may be blown in from the second outlet 22 not only at the beginning of cooling, but also periodically during a stable cooling period, or during heating.

[0175] (summary) Vehicle seat air-conditioning devices 1, 1a, 1b, 1c, and 1d according to an embodiment of the present disclosure will be illustrated.

[0176] The vehicle seat air conditioning devices 1, 1a, 1b, 1c, and 1d of Example 1 are vehicle seat air conditioning devices that are arranged in a vehicle and are used for a seat 10 having a seat back 13 and a seat portion 11, and are equipped with a blower 31, an air intake ventilation duct 40 that guides air sucked in from an air intake port 20 inside the vehicle to the blower 31 when the blower 31 is operated, a first ventilation duct 51 that guides air sent out from the blower 31 to a first discharge port 21 located on at least one of the front and top surfaces of the seat back 13, a second ventilation duct 52 that guides air sent out from the blower 31 to a second discharge port 22 located on the back of the seat back 13, behind the seat portion 11, or to the side of the seat portion 11, and a switching unit 70 that switches the destination of the air discharged from the blower 31 between the first ventilation duct 51 and the second ventilation duct 52. The first ventilation passage 51 discharges air sent from the blower 31 via the switching unit 70 from the first outlet 21 in at least one direction forward and diagonally forward of the seat 10. The second ventilation passage 52 discharges air sent from the blower 31 via the switching unit 70 from the second outlet 22 in a direction different from the rear of the seat 10.

[0177] By providing the switching unit 70 in this way, the vehicle seat air conditioning system can switch the air discharge direction depending on the environment inside the vehicle. Therefore, for example, at the beginning of driving when cooling is insufficient, air that has been warmed by passing through the interior of the seat 10 can be discharged from the second outlet 22 in a direction where no one is present. This reduces discomfort to occupants in the front and rear seats of the vehicle.

[0178] The vehicle seat air conditioning devices 1, 1a, 1b, and 1c of Example 2 are the vehicle seat air conditioning devices described in Example 1, in which the second outlet 22 is located behind the back of the seat back 13 or the seat portion 11, and the second ventilation passage 52 may discharge air downward from the second outlet 22.

[0179] With this, for example, at the beginning of driving when the air conditioning is insufficient, the air that has been warmed by passing through the interior of the seat 10 can be discharged downward from the second outlet port 22. This can prevent discomfort to passengers in the front and rear seats of the vehicle.

[0180] The vehicle seat air conditioning device of Example 3 is the vehicle seat air conditioning device described in Example 1 or 2, and the first outlet 21 may be provided at the top of the seat back 13, and the second outlet 22 may be provided at a position lower than the first outlet 21.

[0181] With this, for example, at the beginning of driving when the air conditioning is insufficient, the air that has been warmed by passing through the interior of the seat 10 can be discharged from the second discharge port 22, which is located lower than the first discharge port 21. This makes it possible to prevent discomfort to passengers in the front and rear seats of the vehicle.

[0182] The vehicle seat air conditioning device of Example 4 is a vehicle seat air conditioning device described in any of Examples 1 to 3, and the first outlet 21 may be provided at the top of the seat back 13, and the second outlet 22 may be provided at a position lower than the upper surface of the seat portion 11.

[0183] With this, for example, at the beginning of driving when the air conditioning is insufficient, the air that has been warmed by passing through the interior of the seat 10 can be discharged from the second outlet 22 located at a position lower than the upper surface of the seat portion 11. This makes it possible to prevent discomfort to passengers in the front and rear seats of the vehicle.

[0184] The vehicle seat air conditioning device of Example 5 is the vehicle seat air conditioning device described in any of Examples 1 to 4, and the intake port 20 may be located below the first discharge port 21 and in at least one of the seat back 13 and the seat portion 11.

[0185] This allows air inside the vehicle to be drawn in through the intake port 20 and then discharged through the first ventilation passage 51 from the first discharge port 21 located above the intake port 20. This allows the seat 10 to be cooled quickly and prevents the air from being heated as it passes through the interior of the seat 10. This prevents discomfort to passengers in the front and rear seats of the vehicle.

[0186] The vehicle seat air conditioning system of Example 6 is the vehicle seat air conditioning system according to any one of Examples 1 to 5, further comprising a control unit 32 that controls a switching unit 70 and the blower 31. The vehicle seat air conditioning system has a first mode m1 in which air is discharged from the first outlet port 21 via the first ventilation passage 51, and a second mode m2 in which air is discharged from the second outlet port 22 via the second ventilation passage 52. The control unit 32 may switch between the first mode m1 and the second mode m2 by controlling the switching unit 70.

[0187] This allows switching between the first mode m1 and the second mode m2 depending on the environment inside the vehicle. Therefore, in the early stages of driving when cooling is insufficient, the air that has been warmed by passing through the interior of the seat 10 can be discharged in a direction where no one is present from the second outlet port 22 in the second mode m2. This makes it possible to prevent discomfort to people in the front and rear seats of the vehicle.

[0188] The vehicle seat air conditioning device of Example 7 is the vehicle seat air conditioning device described in Example 6, in which the switching unit 70 has a movable plate 71 that opens and closes the first ventilation passage 51 and the second ventilation passage 52, and the control unit 32 may switch between the first mode m1 and the second mode m2 by moving the movable plate 71.

[0189] This allows reliable switching between the first mode m1 and the second mode m2. Therefore, the air that has been warmed by passing through the interior of the seat 10 during the early stages of driving when cooling is insufficient can be discharged from the second outlet 22 in a direction where no one is present. This reduces discomfort felt by people in the front and rear seats of the vehicle.

[0190] The vehicle seat air conditioning device of Example 8 is the vehicle seat air conditioning device described in Example 6 or 7, and the control unit 32 may retract the movable plate 71 from the air flow path of the first ventilation passage 51 in the first mode m1.

[0191] This makes it possible to prevent the air flow from being obstructed in the first ventilation passage 51. This allows air to be appropriately discharged from the first discharge port 21. This makes it possible to prevent discomfort to occupants in the front seats of the vehicle.

[0192] The vehicle seat air conditioning device of Example 9 is the vehicle seat air conditioning device described in any of Examples 6 to 8, and the control unit 32 may switch to the second mode m2 when the blower 31 starts operating, and switch to the first mode m1 after a predetermined time has elapsed since the blower 31 started operating.

[0193] This allows the air that passes through the interior of the seat 10 at the beginning of driving when the air conditioning is insufficient to be discharged in a direction where no one is present from the second outlet 22. Also, when the air conditioning is effective after a predetermined time has elapsed, the conditioned air can be discharged from the first outlet 21. This makes it possible to prevent discomfort to occupants in the front and rear seats of the vehicle.

[0194] The vehicle seat air conditioning device of Example 10 is the vehicle seat air conditioning device described in any one of Examples 6 to 8, and the control unit 32 may switch to the second mode m2 when the blower 31 starts operating, and after switching to the second mode m2, switch to the first mode m1 when the temperature inside the vehicle reaches a predetermined temperature.

[0195] This allows the air that passes through the interior of the seat 10 at the beginning of driving when the air conditioning is insufficient to be discharged in a direction where no one is present from the second outlet 22. Also, when the air conditioning is effective and reaches a predetermined temperature, the conditioned air can be discharged from the first outlet 21. This makes it possible to prevent discomfort to occupants in the front and rear seats of the vehicle.

[0196] The vehicle seat air conditioning device of Example 11 is the vehicle seat air conditioning device described in any of Examples 6 to 8, and the control unit 32 may switch to the second mode m2 when the temperature inside the vehicle is higher than a first temperature, and after switching to the second mode m2, switch to the first mode m1 when the temperature inside the vehicle becomes equal to or lower than a second temperature that is lower than the first temperature.

[0197] This allows the air that has been warmed through the interior of the seat 10 during the early stages of driving when the air conditioning is insufficient to be discharged in a direction where no one is present from the second outlet 22. Also, when the air conditioning is effective and the temperature drops below the second temperature, the cooled air can be discharged from the first outlet 21. This makes it possible to prevent discomfort to people in the front and rear seats of the vehicle.

[0198] The vehicle seat air-conditioning device of Example 12 is the vehicle seat air-conditioning device described in any one of Examples 6 to 11, and the control unit 32 may control the blower 31 so that the air volume in the second mode m2 is greater than the air volume in the first mode m1.

[0199] This allows the seat 10 to be cooled quickly, and therefore, it is possible to quickly prevent the air from being heated as it passes through the interior of the seat 10. This makes it possible to prevent discomfort to passengers in the front and rear seats of the vehicle.

[0200] The vehicle seat air conditioning device of Example 13 is the vehicle seat air conditioning device described in any of Examples 6 to 8, and the control unit 32 may control the blower 31 so that the amount of air discharged from the second outlet 22 is less when there is a person in the rear seat behind the seat 10 than when there is no person in the rear seat.

[0201] In this way, when there is a person in the rear seat behind the seat 10, by reducing the amount of air discharged from the second outlet port 22, it is possible to prevent the person in the rear seat of the vehicle from feeling uncomfortable.

[0202] The vehicle seat air conditioning device 1d of Example 14 is the vehicle seat air conditioning device described in Example 1, and the second outlet 22 is provided on the side of the seat portion 11, and the second ventilation passage 52 may discharge air forward from the second outlet 22.

[0203] This allows the air that has been warmed through the interior of the seat 10, for example, at the beginning of driving when the air conditioning is insufficient, to be discharged forward from the second outlet 22 on the side of the seat 11. This prevents discomfort to passengers in the front and rear seats of the vehicle. It also allows the sides of the seat 10 to be cleaned.

[0204] The vehicle seat air conditioning device 1d of Example 15 is the vehicle seat air conditioning device described in Example 1, in which the second outlets 22 are provided on both sides of the seat 11, and the second ventilation passage 52 guides the air sent out from the blower 31 to multiple second outlets 22 located on both sides of the seat 11, and discharges the air forward from each of the multiple second outlets 22.

[0205] This allows the air that has been warmed through the interior of the seat 10, for example, at the beginning of driving when the air conditioning is insufficient, to be discharged forward from the second outlet 22 on the side of the seat 11. This prevents discomfort to passengers in the front and rear seats of the vehicle. Also, both sides of the seat 10 can be cleaned.

[0206] (Other variations, etc.) While the vehicle seat air conditioning device according to the present disclosure has been described above based on the above-described embodiments, the present disclosure is not limited to these embodiments. As long as the modifications do not deviate from the spirit of the present disclosure, modifications that are conceivable by those skilled in the art may also be included in the scope of the present disclosure.

[0207] For example, in the vehicle seat air-conditioning device according to the above embodiment, the configuration has been described in which, at the beginning of cooling, the warmed air inside the seat 10 is discharged from the second outlet 22. However, this may be configured so that, at the beginning of heating, the cold air inside the seat 10 is discharged from the second outlet 22. In this case, discomfort to occupants in the front and rear seats of the vehicle can also be reduced.

[0208] The control units included in the vehicle seat air conditioning devices according to the above embodiments are typically realized as LSIs, which are integrated circuits. These may be implemented individually on a single chip, or some or all of them may be integrated on a single chip.

[0209] Furthermore, the integration is not limited to LSI, but may be realized by dedicated circuits or general-purpose processors. FPGAs (Field Programmable Gate Arrays), which can be programmed after LSI fabrication, or reconfigurable processors, which allow the connections and settings of circuit cells within LSIs to be reconfigured, may also be used.

[0210] In the above-described embodiments, the control unit may be configured with dedicated hardware, or may be realized by executing a software program suitable for each component. Each component may be realized by a program execution unit such as a CPU or processor reading and executing a software program recorded on a recording medium such as a hard disk or semiconductor memory.

[0211] The division of functional blocks in the block diagram is an example, and multiple functional blocks may be realized as a single functional block, one functional block may be divided into multiple blocks, or some functions may be moved to another functional block.Furthermore, the functions of multiple functional blocks having similar functions may be processed in parallel or in time-sharing by a single piece of hardware or software.

[0212] In addition, this disclosure also includes forms obtained by making various modifications to the embodiments that a person skilled in the art would think of, and forms realized by arbitrarily combining the components and functions of the embodiments within the scope that does not deviate from the intent of this disclosure. [Industrial Applicability]

[0213] The present disclosure can be used for, for example, vehicle seats, vehicle sofas, etc. [Explanation of symbols]

[0214] 1, 1a, 1b, 1c, 1d Vehicle seat air conditioning device 2 Ventilation path selection switch 10 sheets 11 Seat area 13 Seat back 15 Headrest 20 Air intake 20a First intake port 20b Second intake port 21 1st discharge port 22 2nd outlet 31 Blower 31a 1st blower 31b 2nd blower 32 Control section 34 Drive unit 40 Intake ventilation duct 51 1st ventilation duct 52 2nd ventilation duct 60 Intake duct ventilation passage 61 First duct ventilation duct 62 Second duct ventilation passage 65 Relay duct 70 Switching section 71 Movable plate 75 Switching valve 120 Intake seat ventilation duct 120a First intake ventilation duct 120b Second intake ventilation duct 121 First sheet ventilation duct 122 Second sheet ventilation duct m1 1st mode m2 Second mode

Claims

1. A vehicle seat air conditioning device that is disposed in a vehicle and is used for a seat having a seat back and a seat portion, A blower and an intake ventilation path that guides air drawn in from an air intake port inside the vehicle to the blower when the blower is operated; a first ventilation passage that guides the air sent out from the blower to a first outlet port located on at least one of a front surface and an upper surface of the seat back; a second ventilation passage that guides the air sent out from the blower to a second outlet port located on the back surface of the seat back, behind the seat portion, or to the side of the seat portion; a switching unit that switches the destination of the air discharged from the blower between the first ventilation passage and the second ventilation passage; Equipped with the first ventilation passage discharges the air sent from the blower via the switching unit from the first discharge port in at least one direction forward and diagonally forward of the seat, The second ventilation passage discharges the air sent from the blower via the switching unit from the second discharge port in a direction different from the rear of the seat. Vehicle seat air conditioning system.

2. The second outlet port is located on the back surface of the seat back or behind the seat portion, The second ventilation passage discharges the air downward from the second outlet.

2. The vehicle seat air conditioning system according to claim 1.

3. The first outlet is provided in an upper portion of the seat back, The second outlet is provided at a lower position than the first outlet.

2. The vehicle seat air conditioning system according to claim 1.

4. The first outlet is provided in an upper portion of the seat back, The second discharge port is provided at a position lower than the upper surface of the seat portion.

2. The vehicle seat air conditioning system according to claim 1.

5. The intake port is located below the first outlet port and in at least one of the seat back and the seat portion.

2. The vehicle seat air conditioning system according to claim 1.

6. Further, a control unit is provided to control the switching unit and the blower, the vehicle seat air conditioning device has a first mode in which the air is discharged from the first outlet port through the first ventilation passage, and a second mode in which the air is discharged from the second outlet port through the second ventilation passage, The control unit controls the switching unit to switch between the first mode and the second mode. The vehicle seat air conditioning device according to any one of claims 1 to 5.

7. the switching unit has a movable plate that opens and closes the first ventilation passage and the second ventilation passage, The control unit switches between the first mode and the second mode by moving the movable plate.

7. The vehicle seat air conditioning system according to claim 6.

8. The control unit retracts the movable plate from the air flow path of the first ventilation passage in the first mode.

8. The vehicle seat air conditioning system according to claim 7.

9. The control unit switches the fan to the second mode when the fan starts operating, and switches the fan to the first mode after a predetermined time has elapsed since the fan started operating.

7. The vehicle seat air conditioning system according to claim 6.

10. The control unit switches the operation mode to the second mode when the operation of the blower is started, and after switching to the second mode, switches the operation mode to the first mode when the temperature inside the vehicle reaches a predetermined temperature.

7. The vehicle seat air conditioning system according to claim 6.

11. The control unit switches to the second mode when the temperature inside the vehicle is higher than a first temperature, and after switching to the second mode, switches to the first mode when the temperature inside the vehicle becomes equal to or lower than a second temperature lower than the first temperature.

7. The vehicle seat air conditioning system according to claim 6.

12. The control unit controls the blower so that the air volume in the second mode is greater than the air volume in the first mode.

7. The vehicle seat air conditioning system according to claim 6.

13. The control unit controls the blower so that, when a person is present in a rear seat behind the seat, the amount of air discharged from the second outlet port is smaller than when no person is present in the rear seat.

7. The vehicle seat air conditioning system according to claim 6.

14. The second outlet port is provided on a side of the seat portion, The second ventilation passage discharges the air forward from the second outlet.

2. The vehicle seat air conditioning system according to claim 1.

15. The second outlet ports are provided on both sides of the seat portion, The second ventilation passage guides the air sent out from the blower to the second outlets located on both sides of the seat, and discharges the air forward from each of the second outlets.

2. The vehicle seat air conditioning system according to claim 1.

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