Seat air conditioning unit

Abstract

The seat air conditioning device (3) comprises: a blower (34); a first ventilation path (31) for guiding air sucked in from a first air inlet (31a) by the blower (34), wherein the first air inlet (31a) is provided on a seat portion (10) of a seat (1); a second ventilation path (32) for discharging the air guided to the first ventilation path (31) by the blower (34) from a first outlet (32a) provided on the seat (1); and a third ventilation path (33) for discharging the air guided to the first ventilation path (31) from a first outlet (32a) provided on the seat (1). The invention discloses a first air inlet (31a) and a second air inlet (33a) for discharging air; and an exhaust ventilation path selection switching unit (35) which is arranged at a position closer to the first exhaust port (32a) and the second exhaust port (33a) than the blower (34); the exhaust ventilation path selection switching unit (35) selects at least one ventilation path from the second ventilation path (32) and the third ventilation path (33) for the air guided to the first ventilation path (31) and switches the selected ventilation path; the first air inlet (31a) is arranged at a position vertically lower than the first exhaust port (32a) and the second exhaust port (33a).

Description

Technical Field

[0001] The present disclosure relates to a seat air conditioning device for supplying air to a person seated on a seat. Background Art

[0002] Patent Document 1 discloses a conventional vehicle seat air conditioning device. The vehicle seat air conditioning device includes: a distribution duct provided in a vehicle seat and divided into a seat ventilation path for the seat back and a seat ventilation path for the seat cushion; and a blower that draws conditioned air from an in-cabin air conditioning unit that conditions the vehicle cabin through an air intake port and blows the conditioned air out of an air outlet, guiding it into the distribution duct.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2015-89682 Summary of the Invention

[0006] Problems to be solved by the invention

[0007] For example, in many conventional seat air conditioners used in vehicles, the seat-mounted blower draws in a portion of the air exhausted by the cabin air conditioning unit, which is used to air condition the vehicle interior. However, in particular, in hot weather, some of the cool air originally used by the cabin air conditioning unit to air condition the vehicle interior is consumed by the heat capacity of the seats, which are heated. Consequently, the entire vehicle interior may not be adequately air-conditioned. This results in reduced air conditioning efficiency, such as cooling and heating efficiency within the vehicle interior, often preventing adequate temperature control within the vehicle interior. For example, in the summer, when vehicle temperatures rise, heat often lingers within the vehicle, so the air drawn into the seat is already hot when the cabin air conditioning unit is activated, making it difficult to supply cool air to the seat.

[0008] Therefore, the present disclosure provides a seat air conditioning device capable of suppressing a decrease in air conditioning efficiency.

[0009] Solutions for solving problems

[0010] The seat air conditioning device according to one embodiment of the present disclosure is a seat air conditioning device for a seat, comprising: an air blower; a first ventilation path for guiding air sucked in from a first air inlet by the air blower, the first air inlet being provided in a seat portion of the seat for seating a person; a second ventilation path for discharging the air guided to the first ventilation path by the air blower from a first exhaust outlet provided in the seat; a third ventilation path, which is a ventilation path different from the second ventilation path, the third ventilation path for discharging the air guided to the first ventilation path by the air blower from a second exhaust outlet provided in the seat; and an exhaust ventilation path selection switching unit provided at a position closer to the first exhaust outlet and the second exhaust outlet than the air blower, The exhaust ventilation path selection switching unit selects at least one ventilation path of the second ventilation path and the third ventilation path for the air guided to the first ventilation path and switches the selected ventilation path, wherein the first air inlet, the first ventilation path, the blower, the exhaust ventilation path selection switching unit, the second ventilation path, the first exhaust outlet, the third ventilation path and the second exhaust outlet are built into the seat, the first air inlet is arranged at a position vertically below the first exhaust outlet and the second exhaust outlet, and draws air from the surface of the seat part on the side where the person sits, that is, the seat surface, the first ventilation path is set in the seat part, and reaches the exhaust ventilation path selection switching unit from the first air inlet via the blower.

[0011] In addition, the general or specific manner may also be implemented through any combination of systems, methods, integrated circuits, etc.

[0012] Effects of the Invention

[0013] The seat air conditioning device of the present disclosure can suppress a decrease in air conditioning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a perspective view showing the appearance of a seat equipped with the seat air conditioner according to the embodiment.

[0015] Figure 2 It shows Figure 1 A perspective view of the appearance of a seat equipped with a seat air conditioner and a cross-sectional view of the seat taken along line II-II are provided.

[0016] Figure 3 This is a block diagram showing a seat air conditioning device according to an embodiment.

[0017] Figure 4 It is a plan view showing the seat air conditioner when the seat back is viewed from the front, and a top view showing the seat air conditioner when the seat portion is viewed from above.

[0018] Figure 5 1 is a flowchart illustrating the processing of the seat air conditioning device according to the embodiment.

[0019] Figure 6 1 and 2 are a schematic plan view showing the flow path of air in the seat back when the first mode is executed, a schematic top view of the seat portion, and a schematic side view of the seat.

[0020] Figure 7 1 and 2 are a schematic plan view showing the flow path of air in the seat back when the second mode is executed, a schematic top view of the seat portion, and a schematic side view of the seat.

[0021] Figure 8 1 and 2 are a schematic plan view showing the flow path of air in the seat back when the third mode is executed, a schematic top view of the seat portion, and a schematic side view of the seat.

[0022] Figure 9 A perspective view showing the appearance of a seat including a seat air conditioner according to a first modification of the embodiment and a cross-sectional view of the seat.

[0023] Figure 10 It is a perspective view showing the appearance of a seat including a seat air conditioner according to a second modification of the embodiment.

[0024] Figure 11 A perspective view showing the appearance of a seat including a seat air conditioner according to a third modification of the embodiment and a cross-sectional view of the seat.

[0025] Figure 12 This is a flowchart showing the processing of the seat air conditioning device according to Modification 4 of the embodiment. DETAILED DESCRIPTION

[0026] The seat air conditioning device according to one embodiment of the present disclosure is a seat air conditioning device for a seat, comprising: an air blower; a first ventilation path for guiding air sucked in from a first air inlet by the air blower, the first air inlet being provided in a seat portion of the seat for seating a person; a second ventilation path for discharging the air guided to the first ventilation path by the air blower from a first exhaust outlet provided in the seat; a third ventilation path, which is a ventilation path different from the second ventilation path, the third ventilation path for discharging the air guided to the first ventilation path by the air blower from a second exhaust outlet provided in the seat; and an exhaust ventilation path selection switching unit provided at a position closer to the first exhaust outlet and the second exhaust outlet than the air blower, The exhaust ventilation path selection switching unit selects at least one ventilation path of the second ventilation path and the third ventilation path for the air guided to the first ventilation path and switches the selected ventilation path, wherein the first air inlet, the first ventilation path, the blower, the exhaust ventilation path selection switching unit, the second ventilation path, the first exhaust outlet, the third ventilation path and the second exhaust outlet are built into the seat, the first air inlet is arranged at a position vertically below the first exhaust outlet and the second exhaust outlet, and draws air from the surface of the seat part on the side where the person sits, that is, the seat surface, the first ventilation path is set in the seat part, and reaches the exhaust ventilation path selection switching unit from the first air inlet via the blower.

[0027] Thus, the blower can draw air from the first air inlet provided on the seat, that is, it can draw in air circulated around the seat. For example, compared to conventional seat air conditioners used in vehicles, which directly supply a portion of the cold or warm air conditioned by the vehicle's air conditioner to the seat, the present invention makes it less likely that the seat will consume the cold or warm air directly discharged by the seat air conditioner. Therefore, air conditioned by the air conditioner throughout the vehicle cabin is drawn in through the first air inlet, discharged through at least the first or second outlet, and blown toward the seated person, thereby cooling or warming the person.

[0028] Therefore, the seat air conditioning device can suppress a decrease in air conditioning efficiency.

[0029] In particular, since the first air inlet is positioned vertically below the first and second outlets, it is possible to, for example, position the first air inlet in a location corresponding to a person's lower limbs and the first and second outlets in locations corresponding to a person's upper torso. In this case, air is drawn in through the first air inlet located near the seat surface, generating an airflow near the person's body. This drawn-in air is then discharged through at least the first or second outlet, allowing air to be blown toward the person. This creates an airflow that surrounds the person's body, allowing conditioned air to remain around the person seated in the seat, providing a comfortable air-conditioned environment with minimal air conditioning energy. More specifically, since air can be drawn in through the first air inlet formed in the seat surface, it is possible to reduce the risk of stuffiness caused by perspiration in the person's buttocks and thighs in contact with the seat surface. Furthermore, since the first and second outlets are positioned vertically above the first air inlet, air can be blown toward the person's upper torso. That is, it is possible to generate airflow from the upper body of a person toward the area corresponding to the buttocks and thighs, so that the conditioned air can stay around the person sitting on the seat, and a more comfortable air-conditioned environment can be provided with minimal air-conditioning energy.

[0030] Furthermore, in the summer, when a person sits in a vehicle while sweating, air is particularly exhausted from the buttocks because the first air intake is positioned vertically below the seat relative to the first and second air outlets. This prevents air from being exhausted from the buttocks. This prevents the person from feeling uncomfortable due to unnecessary cooling of the sweating buttocks.

[0031] Furthermore, conventional vehicle seat air conditioners draw in air exhausted from the cabin air conditioning unit. However, in the summer, immediately after a person sits in a vehicle, the cabin air conditioning unit is not fully activated, drawing in warm air before exhausting cool air. Consequently, so-called warm air is discharged toward the person, sometimes causing discomfort. In contrast, the seat air conditioner according to one embodiment of the present disclosure does not directly draw in exhaust air from an air conditioner (cabin air conditioning unit), thereby minimizing discomfort caused by the exhaust of warm air.

[0032] Furthermore, the first air intake, first ventilation path, blower, exhaust ventilation path selection switch, second ventilation path, first exhaust outlet, third ventilation path, and second exhaust outlet constituting the seat air conditioning device are built into the seat, thereby simplifying the structure.

[0033] Furthermore, in a seat air conditioning device according to another aspect of the present disclosure, the first discharge outlet is arranged vertically below the second discharge outlet.

[0034] Thus, by providing the first and second outlets at locations corresponding to, for example, the upper body of a person, air can be blown toward the lower side of the person's upper body through the first outlet, or toward the upper side of the person's upper body through the second outlet. This allows for localized cooling or heating by blowing air to specific areas of the person's body, allowing the conditioned air to remain around the person seated in the chair, thereby providing a more comfortable air-conditioned environment with minimal air-conditioning energy.

[0035] In the seat air conditioning device according to another aspect of the present disclosure, the exhaust ventilation path selection switching unit has a first mode for exhausting air from the first exhaust port by guiding the air guided to the first ventilation path only to the second ventilation path.

[0036] This allows, for example, air to be blown toward the lower side of a person's upper body, such as the buttocks and waist. In other words, air is prevented from being blown toward the upper side of the person's upper body, such as the head and neck. Air discharged from the first outlet and blown toward the lower side of the person's upper body is then drawn into the first air inlet of the seat surface. In other words, this air is drawn from the first outlet through the lower side of the person's upper body into the first air inlet. This creates an airflow that encompasses the lower side of the person's upper body, extending all the way to the buttocks and thighs.

[0037] As a specific example, the first mode can be used to prevent the area of ​​the seat contacting the person from becoming stuffy when a person has been seated for an extended period, or when the seat heater is on while the air conditioner is heating the area surrounding the seat. As another example, the first mode, which prevents air from being discharged from the second outlet, can be used to prevent the air from reaching the person's warm head and neck, thereby minimizing the discomfort of excessive cooling. This allows the conditioned air to remain around the seated person, providing a more comfortable air-conditioned environment with minimal air conditioning energy consumption.

[0038] In the seat air conditioning device according to another embodiment of the present disclosure, the exhaust ventilation path selection switching unit has a second mode for exhausting air from the second exhaust outlet by guiding the air guided to the first ventilation path only to the third ventilation path.

[0039] This allows, for example, air to be blown toward the upper part of a person's upper body, such as the head and neck, while preventing air from being blown toward the lower part of the upper body, such as the buttocks and waist. Air discharged from the second outlet and blown toward the upper part of the person's upper body is then drawn into the first air inlet of the seat surface. In other words, this air is drawn from the second outlet through the upper part of the person's upper body and into the first air inlet. This creates an airflow that surrounds the upper part of the person's upper body, as well as the buttocks and thighs.

[0040] For example, even if the air conditioner lowers the temperature around the seat to cool the remaining heat, the person's back and waist may still become soaked with sweat. In this case, the second mode can be used to prevent the person's back and waist from being excessively cooled, while also cooling the shoulder blades, neck, and head. This allows the conditioned air to remain around the seated person, providing a more comfortable air-conditioned environment with minimal air conditioning energy.

[0041] In addition, in the seat air conditioning device involved in another embodiment of the present disclosure, the exhaust ventilation path selection switching unit has a third mode, and the third mode is used to discharge air from the first exhaust outlet and the second exhaust outlet at the same time by guiding the air guided to the first ventilation path to the second ventilation path and the third ventilation path at the same time.

[0042] Thus, the air discharged from the first and second outlets and blown toward the person is drawn in through the first air inlet of the seat surface. In other words, the air is drawn in through the first and second outlets through the person seated in the seat and into the first air inlet. This creates an airflow that surrounds substantially the entire person's body, from the entire upper body to the buttocks and thighs.

[0043] To give a specific example, even if the air conditioner lowers the temperature around the seat to dissipate residual heat, the person's body may still be enveloped in heat during periods of high sunlight or when seated for long periods. In such cases, the third mode can be used to cool the person's entire body. Furthermore, if it is desired to reduce the energy consumption of the air conditioner, the third mode can also be used to cool the person's entire body. This allows the conditioned air to remain around the seated person, providing a more comfortable air-conditioned environment while also reducing energy consumption for the entire system, including the air conditioner.

[0044] In addition, in another embodiment of the present invention, a seat air conditioning device is further provided with a control unit, which controls the blower and the exhaust ventilation path selection switching unit, and the exhaust ventilation path selection switching unit has: a first mode, the first mode is used to discharge air from the first exhaust outlet by guiding the air guided to the first ventilation path only to the second ventilation path; a second mode, the second mode is used to discharge air from the second exhaust outlet by guiding the air guided to the first ventilation path only to the third ventilation path; and a third mode, the third mode is used to discharge air from the first exhaust outlet and the second exhaust outlet at the same time by guiding the air guided to the first ventilation path to the second ventilation path and the third ventilation path at the same time, and the control unit switches the mode of the exhaust ventilation path selection switching unit by selecting any one mode from the first mode, the second mode and the third mode.

[0045] According to this, the control unit can select any one of the first mode, the second mode, and the third mode, and thus can appropriately perform cooling or heating according to the state and desire of the person.

[0046] In addition, in the seat air conditioning device involved in another embodiment of the present disclosure, at least one of a temperature sensor and a humidity sensor is also provided, and the control unit switches the mode of the exhaust ventilation path selection switching unit based on information representing the temperature detected by the temperature sensor and information representing the humidity detected by the humidity sensor.

[0047] This allows the temperature and humidity near the seat to be detected, allowing the exhaust ventilation path selection switch to be switched to create a comfortable air flow. Furthermore, the results of the temperature and humidity detection can be output to an air conditioner, for example. The air conditioner can then perform air conditioning based on the temperature and humidity detection results.

[0048] Furthermore, in a seat air conditioning device according to another aspect of the present disclosure, at least one of the temperature sensor and the humidity sensor is disposed in the first ventilation path or the exhaust ventilation path selection switching portion.

[0049] This allows for highly accurate detection of the seat surface temperature and humidity. Specifically, it can accurately detect the temperature of the seat's buttocks and thighs, and the humidity between the buttocks and thighs and the seat surface. This allows the exhaust ventilation path selection switch to be switched to create a more comfortable air flow.

[0050] In a seat air conditioning device according to another embodiment of the present disclosure, the first ventilation path communicates with a second air intake port, the second air intake port being an air intake port different from the first air intake port and formed on a surface of the seat other than the seat surface.

[0051] As a result, the first ventilation path communicates not only with the first air inlet but also with the second air inlet. This allows the air drawn in through the first air inlet between the seat and the person to mix with the air drawn in through the second air inlet formed outside the seat. This actively draws in air surrounding the seat, providing a more comfortable air-conditioned environment for the seated person.

[0052] In addition, in a seat air conditioning device according to another embodiment of the present disclosure, the first outlet is arranged at a position corresponding to at least one of a person's back and waist, and the second outlet is arranged at a position corresponding to at least one of a person's head, neck, and acromion.

[0053] Thus, when air is discharged from the first outlet, it can be blown to at least one of the person's back and waist. When air is discharged from the second outlet, it can be blown to at least one of the person's head, neck, and shoulder blades. This allows the person's body to be cooled or warmed locally, or even substantially cooled or warmed throughout the entire body. This allows the conditioned air to remain around the seated person, providing a more comfortable air-conditioned environment with minimal air conditioning energy consumption.

[0054] In the seat air conditioning device according to another aspect of the present disclosure, the control unit switches the exhaust ventilation path selection switch unit first to the first mode, then to the second mode, and then to the third mode when driving the blower.

[0055] Accordingly, especially in the summer, from the time a person just gets into the vehicle until the cooling of the air conditioner progresses, seat air conditioning is performed in a mode that adapts to the ever-changing environment inside the vehicle, so that the conditioned air can stay around the person sitting in the seat, and a more comfortable air-conditioned environment can be provided with minimal air-conditioning energy.

[0056] In addition, in a seat air conditioning device involved in another embodiment of the present disclosure, when at least one of the temperature and the humidity is stable within a prescribed range based on information indicating the temperature detected by the temperature sensor and information indicating the humidity detected by the humidity sensor, the control unit switches the exhaust ventilation path selection switching unit to the first mode.

[0057] Accordingly, when the cooling by the air conditioner is stable, the air is discharged from the back and waist, and not to the head, neck and acromion, thereby preventing the head, neck and acromion from being overcooled, and maintaining a comfortable air-conditioned environment by maintaining an air flow that surrounds the back and waist to the legs.

[0058] Furthermore, in a vehicle seat air conditioning device according to another aspect of the present disclosure, the first air intake port is formed at a central portion and an outer edge portion of the seat surface.

[0059] Thus, by drawing air between the buttocks and thighs and the seat surface through the first air inlet formed in the center of the seat surface, stuffiness around the person's buttocks and thighs can be reduced. Furthermore, the first air inlet formed in the outer edge of the seat surface is located in a position less likely to be covered by the person's buttocks and thighs, allowing air to be drawn in from the surrounding area of ​​the seat. For example, even if air cannot be drawn in through the first air inlet formed in the center of the seat surface, air can still be drawn in through the first air inlet formed in the outer edge of the seat surface, allowing air to be discharged through the first and second outlets.

[0060] Furthermore, in a vehicle seat air conditioning device according to another aspect of the present disclosure, the outer edge portion is at least one of a rear side portion and a front end portion of the seat surface.

[0061] According to this, the outer edge of the seat surface, in particular the rear side and the front end of the seat surface, are less likely to be covered by the buttocks and thighs of the person, thereby further improving the accuracy with which air can be inhaled from the first air inlet.

[0062] In addition, in a vehicle seat air conditioning device involved in another embodiment of the present invention, there is also a second air intake port arranged at a position different from the first air intake port, a fourth ventilation path connected to the second air intake port, and an intake ventilation path selection switching unit connected to the first ventilation path and the fourth ventilation path, the intake ventilation path selection switching unit is connected to the control unit, the blower is connected between the intake ventilation path selection switching unit and the exhaust ventilation path selection switching unit, the intake ventilation path selection switching unit has a fourth mode for connecting the first ventilation path to the blower, a fifth mode for connecting the fourth ventilation path to the blower, and a sixth mode for connecting the first ventilation path and the fourth ventilation path to the blower, and the control unit switches the mode of the intake ventilation path selection switching unit by selecting any one mode from the fourth mode, the fifth mode and the sixth mode.

[0063] This allows the selection and mixing of air drawn in from the first air inlet between the seat surface and the person and air drawn in from the second air inlet formed outside the seat surface. If the temperature of the air drawn in from the second air inlet differs from that of the air drawn in from the first air inlet, the selection and mixing of these allows for more precise temperature adjustment, thereby providing a more comfortable air-conditioned environment for the person seated in the seat.

[0064] In addition, in another embodiment of the present invention, the control unit has the following action process: (1) switching the intake ventilation path selection switching unit to the fourth mode, and switching the exhaust ventilation path selection switching unit to the first mode; (2) switching the intake ventilation path selection switching unit to the fifth mode, and switching the exhaust ventilation path selection switching unit to the second mode; (3) switching the intake ventilation path selection switching unit to the sixth mode; (4) switching the intake ventilation path selection switching unit to the fourth mode; (5) switching the exhaust ventilation path selection switching unit to the third mode.

[0065] According to this, for example, when a person sits in a car in midsummer, even if the air conditioner cannot blow out cold air, the person can first use the action (1) to blow air only to the waist and back of the person, thereby giving a cool feeling through the vaporization heat of sweat. At this time, the neck and shoulders are not blown, so as to avoid contact with the warm air. Then, through the action (2), when the air conditioner starts to blow out cold air, the cold air is actively introduced from the second air inlet, and the air supply to the waist and back soaked with sweat is stopped (to suppress overcooling), and the neck and shoulders are blown out to cool down. Then, through the action (3), air is also taken in from the first air inlet of the seat surface, and an air flow that surrounds the person is started, thereby improving comfort. Then, through the action (4), only an air flow that surrounds the person is generated, and the introduction of cold air from the air conditioner is stopped to prevent overcooling. Then, through the action (5), air is not only blown to the neck and shoulders, but also to the waist and back, thereby suppressing the heat that surrounds the waist and back caused by long-term riding in the car. By including such an operation process in the control of the control unit, it is possible to improve the riding comfort particularly in midsummer.

[0066] In addition, in a vehicle seat air conditioning device involved in another embodiment of the present disclosure, when the intake ventilation path selection switching unit continues to be in the fourth mode or the sixth mode throughout the first prescribed period, the control unit switches the intake ventilation path selection switching unit to the fifth mode throughout the second prescribed period, and alternately switches the exhaust ventilation path selection switching unit between the first mode and the second mode.

[0067] Accordingly, while continuously generating an airflow surrounding the person, especially when the driver's tension is relieved, air from the air conditioner whose temperature is different from the temperature of the seat surface (first air intake) is only sucked in from the second air intake port, and is blown alternately toward the driver's waist, back, neck, and shoulders, thereby attracting the driver's attention.

[0068] In addition, in this embodiment, description is given assuming that the description of the neck and the acromion of a person includes the upper back near the neck and the acromion.

[0069] In addition, the embodiments described below are general or specific examples. The numerical values, shapes, materials, components, configuration positions and connection methods of components, steps, and the order of steps shown in the following embodiments are examples and are not intended to limit the present disclosure. In addition, among the components of the following embodiments, components not described in the independent claims are described as arbitrary components.

[0070] In addition, each figure is a schematic diagram and does not necessarily represent a strict illustration. In addition, in each figure, the same reference numerals are used for the same components. In addition, in the following embodiments, expressions such as "approximately rectangular" are used. For example, "approximately rectangular" not only means a completely rectangular shape, but also means a substantially rectangular shape, that is, including an error of, for example, a few percent. In addition, "approximately rectangular" refers to a rectangular shape within the scope of being able to exert the effects of the present disclosure. The same applies to other expressions using "approximately".

[0071] In the following description, the front-to-back direction of the seat is referred to as the X-axis direction, and the up-down direction of the seat is referred to as the Z-axis direction. Furthermore, the left-to-right direction of the seat, that is, the direction perpendicular to the X-axis direction and the Z-axis direction, is referred to as the Y-axis direction. In addition, the front side of the seat in the X-axis direction is referred to as the positive direction side, and the rear side of the seat in the X-axis direction is referred to as the negative direction side. In addition, the left side of the seat in the Y-axis direction (from the left) is referred to as the negative direction side. Figure 1 The right side (the front side, as viewed from the left) is called the positive direction side, and the opposite side is called the negative direction side. In addition, the right side refers to the right side of a person relative to the direction of travel of the vehicle when the person is seated on the seat, and is the negative direction of the Y axis. In addition, the left side refers to the left side of a person relative to the direction of travel of the vehicle when the person is seated on the seat, and is the positive direction of the Y axis. In addition, the upper side of the seat in the Z-axis direction is called the positive direction side, and the lower side of the seat in the Z-axis direction is called the negative direction side. Figure 2 The same applies to subsequent figures.

[0072] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.

[0073] (Implementation Method)

[0074] <Structure: Seat 1>

[0075] Figure 1 It is a perspective view showing the appearance of a seat 1 equipped with a seat air conditioner 3 according to the embodiment. Figure 2 It shows Figure 1 A perspective view of the appearance of the seat 1 equipped with the seat air conditioner 3 and a cross-sectional view of the seat taken along line II-II are shown. Figure 3 1 is a block diagram showing the seat air conditioning device 3 according to the embodiment.

[0076] like Figures 1 to 3 As shown, a seat 1, for example, used in a vehicle, cools or warms a person seated in seat 1 by blowing air toward the person's upper body. Specifically, seat 1 cools or warms the person's body by blowing air toward the head, neck, shoulder blades, back, and waist. Furthermore, airflow is generated by drawing air from areas corresponding to the buttocks and thighs, thereby reducing stuffiness between the buttocks and thighs and seat 1. This seat 1 includes a seat portion 10 for seating, a seat back 13, a headrest 15, a seat air conditioner 3, and a power supply unit 70.

[0077] [Seat 10]

[0078] like Figure 1 and Figure 2 As shown, the seat portion 10 is a seat cushion for supporting the buttocks and thighs of a person sitting on the seat 1. The seat portion 10 includes a first seat pad 11a corresponding to a cushioning material and a first seat cover 11b covering the first seat pad 11a.

[0079] The first seat cushion 11a is made of, for example, polyurethane foam and forms the seat body. The first seat cushion 11a is a thick, generally rectangular plate, positioned approximately parallel to the XY plane. The first seat cushion 11a supports the seated person's buttocks and thighs.

[0080] The first seat cushion 11a is provided with a first ventilation path 31 for guiding air drawn in from the first vent 12a of the seat surface 11c, which is the surface on the positive Z-axis side of the first seat cover 11b. Furthermore, directly below the first seat cushion 11a are provided the first ventilation path 31, a portion of the second ventilation path 32, a portion of the third ventilation path 33, a blower 34, and an exhaust ventilation path selection switch 35, which are components of the seat air conditioning unit 3. Specifically, these are fixed to a spring directly below the first seat cushion 11a, but are not fixed to the spring. Figure 2The spring is omitted. Furthermore, the components of the seat air conditioning system 3 are not limited to being fixed to the springs; they can also be fixed to the seat frame in front of the first seat cushion 11a. Air is driven by the blower 34, causing air to flow into the first ventilation path 31 within the first seat cushion 11a. The first ventilation path 31 formed in the first seat cushion 11a can be simply a through-hole formed in the first seat cushion 11a, or it can be composed of a ventilation duct.

[0081] The first seat cover 11b is a cover for covering the first seat cushion 11a and is made of, for example, leather or fabric.

[0082] A first vent 12a for taking in air is formed in the first seat cover 11b. The first vent 12a is formed on the seat surface 11c, which is the surface on the side where the person sits (the surface on the positive side of the Z axis), of the seat portion 10, and is located at a position corresponding to the first air inlet 31a of the seat air conditioner 3. In this embodiment, a plurality of first vents 12a are formed along the X axis relative to the first seat cover 11b, and a plurality of rows are formed along the Y axis. Figure 1 In FIG. 1 , the solid arrow corresponds to the first vent 12 a .

[0083] Air drawn in through the first vent 12a is guided to the first air inlet 31a of the seat air conditioning unit 3, where it is drawn in through the first air inlet 31a and guided to the first ventilation path 31. Therefore, the first vent 12a also serves as an air inlet for sucking air convecting on the seat surface 11c using the suction force generated by the first air inlet 31a when the seat air conditioning unit 3 is driven. Alternatively, the first vent 12a may be part of the first ventilation path 31. In this case, the first vent 12a is an example of a first air inlet.

[0084] [Seat back 13]

[0085] The seat back 13 is a backrest that supports the shoulder blades, back, and waist of a person seated in the seat 1. The seat back 13 is elongated along the Z-axis and is positioned upright relative to the seat portion 10. The seat back 13 includes a second seat cushion 13a, which serves as a cushioning material, and a second seat cover 13b that covers the second seat cushion 13a.

[0086] The second seat cushion 13a is made of polyurethane foam, for example, and has a structure at the bottom of the seat back 13 that allows the backrest angle to be adjusted around the Y axis according to the posture. The second seat cushion 13a supports the shoulder, back, and waist of the seated person.

[0087] The second seat cushion 13a is provided with a portion of a second ventilation path 32 and a portion of a third ventilation path 33 for discharging air drawn in through the first vent 12a. In the second seat cushion 13a, air flowing into the first seat cushion 11a from the first ventilation path 31 driven by the blower 34 is discharged through at least one of the first outlet 32a of the second ventilation path 32 and the second outlet 33a of the third ventilation path 33. The second ventilation path 32 and the third ventilation path 33 formed in the second seat cushion 13a may simply be through-holes formed in the first seat cushion 11a or may comprise ventilation ducts.

[0088] The second seat cover 13b is a cover for covering the second seat cushion 13a. The second seat cover 13b is, for example, a leather cover or a fabric cover.

[0089] A second vent 12b and a third vent 12c for discharging the inhaled air are formed on the second seat cover 13b. The second vent 12b is formed on the surface facing the person sitting on the seat 10 (the surface on the positive side of the X-axis) and at a position corresponding to the first exhaust port 32a of the second ventilation path 32. In addition, the third vent 12c is formed on the surface facing the person sitting on the seat 10 and at a position corresponding to the second exhaust port 33a of the third ventilation path 33. The third vent 12c is arranged at a position vertically above the second vent 12b, that is, on the positive side of the Z-axis. In this embodiment, a plurality of the second vent 12b and the third vent 12c are respectively formed relative to the second seat cover 13b. Figure 1 In FIG. 1 , the dotted arrow corresponds to the second ventilation path 32 , and the dashed arrow corresponds to the third ventilation path 33 .

[0090] Specifically, the plurality of second vents 12b are divided into three groups. The first of the three groups is formed in the center portion of the second seat cover 13b in the Y-axis direction. The remaining two groups, the second and third groups, are formed in the second seat cover 13b, positioned on both sides of the center portion, in the positive and negative directions of the Y-axis. In other words, the first group is formed in a portion of the second seat cover 13b corresponding to at least one of the back and waist of a person, while the second and third groups are formed in locations corresponding to the arms or ribs.

[0091] Furthermore, the plurality of third vents 12c are also divided into three groups. The fourth of the three groups is formed in the center portion of the second seat cover 13b in the Y-axis direction. The remaining fifth and sixth groups are formed in the second seat cover 13b, positioned on both sides of the center portion, in the positive and negative Y-axis directions. For example, the fourth group is formed in a portion of the second seat cover 13b corresponding to at least one of the head, neck, and acromion, while the fifth and sixth groups are formed in locations corresponding to the ears or acromion.

[0092] The plurality of second vents 12b allow air to pass through the first and second ventilation paths 31, 32 and then through the first outlet 32a. Specifically, when the air directed into the first and second ventilation paths 31, 32 by the seat air conditioning system 3 is discharged from the first outlet 32a, the air is directed to the second vents 12b. Therefore, the second vents 12b also serve as outlets for discharging air outside the seat 1. Alternatively, the second vents 12b may be part of the second ventilation path 32. In this case, the second vents 12b serve as an example of the first outlet.

[0093] Furthermore, the plurality of third vents 12c also serve to allow air directed into the first and third ventilation paths 31, 33 and discharged from the second outlet 33a to pass through. Specifically, when the air directed into the first and third ventilation paths 31, 33 by the seat air conditioning unit 3 is discharged from the second outlet 33a, this air is directed into the third vents 12c. Therefore, the third vents 12c also serve as outlets for discharging air outside the seat 1. Alternatively, the third vents 12c may be part of the third ventilation path 33. In this case, the third vents 12c serve as an example of a second outlet.

[0094] [Headrest 15]

[0095] The headrest 15 is a headrest portion for supporting the head of a person sitting on the seat 1. The headrest 15 is fixed to an end portion of the seat back 13 on the positive Z-axis direction side.

[0096] In addition, the third vent 12 c may be formed in the headrest 15 . In other words, a part of the third ventilation path 33 may be provided in the headrest 15 .

[0097] [Seat air conditioning unit 3]

[0098] The seat air conditioner 3 is an air conditioner for the seat 1 that blows air from behind the person seated in the seat 1. The seat air conditioner 3 draws in air circulated around the seat 1 and blows the air. Therefore, if the temperature around the seat 1 is higher than normal, the air is warm, and if it is lower than normal, the air is cold. Alternatively, the seat air conditioner 3 may be equipped with an air conditioner capable of both heating and cooling.

[0099] Figure 4 1 and 2 are a plan view showing the seat air conditioner 3 when the seat back 13 is viewed from the front, and a top view showing the seat air conditioner 3 when the seat portion 10 is viewed from above.

[0100] like Figures 2 to 4As shown, the seat air conditioning device 3 includes a blower 34 , a first ventilation path 31 , a second ventilation path 32 , a third ventilation path 33 , an exhaust ventilation path selection switch 35 , a sensor 50 , and a control unit 60 .

[0101] The blower 34 draws air from the first vent 12a formed in the first seat cover 11b of the seat 1 and discharges the drawn-in air from the second vent 12b and the third vent 12c formed in the second seat cushion 13a. Specifically, the blower 34 is electrically connected to the control unit 60 and is driven and controlled by the control unit 60 to draw air from the first air inlet 31a via the first vent 12a and discharge the drawn-in air from the first outlet 32a through the first ventilation path 31, the exhaust ventilation path selection switching unit 35, and the second ventilation path 32, or discharge the drawn-in air from the second outlet 33a through the first ventilation path 31, the exhaust ventilation path selection switching unit 35, and the third ventilation path 33.

[0102] The blower 34 is positioned inside the first seat cushion 11a (directly below the first seat cushion 11a in this embodiment) to draw air in through the first air inlet 31a of the first seat cover 11b. While the blower 34 is positioned within the first ventilation path 31 in this embodiment, the blower 34 may alternatively be positioned outside the first ventilation path 31 as long as a flow path is formed for air to flow from the first air inlet 31a of the first ventilation path 31 to the exhaust ventilation path selection switch 35. The blower 34 may also be positioned outside the first seat cushion 11a; the placement is not particularly limited.

[0103] The first ventilation path 31 is used to guide air drawn in through a first air inlet 31a provided in the seat portion 10 of the chair 1 by a blower 34. In other words, air flows within the first ventilation path 31. The first ventilation path 31 is comprised, for example, of a ventilation duct. One end of the first ventilation path 31 forms the first air inlet 31a, and the other end of the first ventilation path 31 is connected to the exhaust ventilation path selection and switching unit 35 via the blower 34. In other words, the first ventilation path 31 extends from the first air inlet 31a through the blower 34 to the exhaust ventilation path selection and switching unit 35. The first air inlet 31a draws air in from the seat portion 10's seated side (the seat surface 11c), corresponding to the first air vent 12a of the first seat cover 11b. When viewed along the Z-axis, the first air inlet 31a and the first air vent 12a overlap. In this embodiment, the first air inlet 31a draws air in through the first vent 12a, but a configuration where air is drawn in directly is also possible.

[0104] The second ventilation path 32 allows the air guided to the first ventilation path 31 by the blower 34 to flow within the second ventilation path 32 and discharge the air from the first exhaust port 32a provided on the seat back 13 of the seat 1. The second ventilation path 32 is constituted by, for example, a ventilation duct. One end of the second ventilation path 32 forms the first exhaust port 32a, and the other end of the second ventilation path 32 is connected to the exhaust ventilation path selection switching unit 35. The first exhaust port 32a corresponds to the second vent 12b of the second seat cover 13b. When viewed along the X-axis direction, the first exhaust port 32a overlaps with the second vent 12b. In the present embodiment, the first exhaust port 32a exhausts air via the second vent 12b, but it may also be a structure that directly exhausts air.

[0105] The second ventilation path 32 extends from the exhaust ventilation path selection switching unit 35 to the first exhaust outlet 32a. In this embodiment, the second ventilation path 32 extends from the exhaust ventilation path selection switching unit 35 in the first seat cushion 11a to the second seat cushion 13a. In addition, in this embodiment, the second ventilation path 32 is a roughly Y-shaped structure that extends to the vicinity of the second vent 12b (first group) formed in the central portion of the second seat cover 13b in the Y-axis direction, and extends from the vicinity of the first group in both the positive and negative directions of the Y-axis. The first exhaust outlets 32a are respectively formed in the portion of the second ventilation path 32 corresponding to the first group and at the front ends of each second ventilation path 32 extending to the two sides. In other words, the first exhaust outlets 32a are arranged at a position corresponding to at least one of the back and waist of a person.

[0106] The third ventilation path 33 is a ventilation path different from the second ventilation path 32, and is used to allow the air guided to the first ventilation path 31 by the blower 34 to flow in the third ventilation path 33 and discharge the air from the second exhaust port 33a provided on the seat back 13 of the seat 1. The third ventilation path 33 is composed of, for example, a ventilation duct. One end of the third ventilation path 33 forms the second exhaust port 33a, and the other end of the third ventilation path 33 is connected to the exhaust ventilation path selection switching unit 35. The second exhaust port 33a corresponds to the third vent 12c of the second seat cover 13b. When viewed along the X-axis direction, the second exhaust port 33a overlaps with the third vent 12c. In this embodiment, the second exhaust port 33a discharges air via the third vent 12c, but it can also be a structure that directly discharges air.

[0107] The third ventilation path 33 extends from the exhaust ventilation path selection switch 35 to the second exhaust outlet 33a. In this embodiment, the third ventilation path 33 extends from the exhaust ventilation path selection switch 35 in the first seat cushion 11a to the second seat cushion 13a. Furthermore, in this embodiment, the third ventilation path 33 is a roughly Y-shaped structure that extends to the vicinity of the third vent 12c (fourth group) formed in the Y-axis center portion of the second seat cover 13b and extends from the vicinity of the fourth group in both the positive and negative directions of the Y-axis. The second exhaust outlets 33a are formed in the portion of the third ventilation path 33 corresponding to the fourth group and at the front ends of each of the third ventilation paths 33 extending to the two sides. In other words, the second exhaust outlets 33a are arranged at a position corresponding to at least one of the head, neck, and acromion of a person.

[0108] Due to the configuration of the first, second, and third ventilation paths 31, 32, and 33, the first air inlet 31a, first outlet 32a, and second outlet 33a have the following relationship. The first air inlet 31a is positioned vertically below the first and second outlets 32a, 33a. Furthermore, the first outlet 32a is positioned vertically below the second outlet 33a. This allows air drawn in from areas corresponding to the person's buttocks and thighs to be discharged from areas corresponding to the person's head, neck, shoulder blades, back, and waist, thereby creating an airflow that surrounds the person seated in the chair 1.

[0109] The exhaust ventilation path selection switching unit 35 is arranged at a position closer to the first exhaust port 32a and the second exhaust port 33a than the blower 34, and is used to select at least one ventilation path of the second ventilation path 32 and the third ventilation path 33 for the air guided to the first ventilation path 31 and switch the selected ventilation path. The exhaust ventilation path selection switching unit 35 is composed of a damper and the like, and is capable of switching the flow path of the air, that is, the ventilation path. With respect to the air guided to the first ventilation path 31, the exhaust ventilation path selection switching unit 35 is arranged at a position closer to the downstream side than the blower 34. The exhaust ventilation path selection switching unit 35 can selectively guide the air guided to the first ventilation path 31 in any of the following ways: only to the second ventilation path 32, only to the third ventilation path 33, or to both the second ventilation path 32 and the third ventilation path 33.

[0110] Specifically, the exhaust ventilation path selection switching unit 35 has a first mode, a second mode, and a third mode. The first mode is used to discharge air from the first exhaust port 32a by directing the air directed to the first ventilation path 31 only to the second ventilation path 32. The second mode is used to discharge air from the second exhaust port 33a by directing the air directed to the first ventilation path 31 only to the third ventilation path 33. The third mode is used to discharge air from the first exhaust port 32a and the second exhaust port 33a simultaneously by directing the air directed to the first ventilation path 31 to both the second ventilation path 32 and the third ventilation path 33. The exhaust ventilation path selection switching unit 35 is electrically connected to the control unit 60 and is driven and controlled by the control unit 60 to select any one of the first mode, the second mode, and the third mode.

[0111] [Sensor 50]

[0112] The sensor 50 detects a state related to the seat 1 and a state of a person sitting on the seat 1 .

[0113] Specifically, the sensor 50 detects at least one of the temperature and humidity of the air guided into the first ventilation path 31 as a condition related to the seat 1. The sensor 50 comprises a temperature sensor 51 and a humidity sensor 52. In the seat air conditioning unit 3 of this embodiment, both the temperature sensor 51 and the humidity sensor 52 are used as the sensor 50. In this embodiment, the seat air conditioning unit 3 only needs to include at least one of the temperature sensor 51 and the humidity sensor 52. Here, the humidity sensor 52 is configured to measure and output relative humidity.

[0114] The temperature sensor 51 and humidity sensor 52 are located in the first ventilation path 31 or the exhaust ventilation path selection switch 35. Thus, the temperature sensor 51 and humidity sensor 52 can accurately detect the temperature corresponding to the buttocks and thighs of a person seated on the seat 1, and the humidity corresponding to the area between the buttocks and thighs and the seat surface 11c. The temperature sensor 51 and humidity sensor 52 output information indicating the temperature and humidity as detected results to the control unit 60.

[0115] Furthermore, the sensor 50 detects the state of a person. The state of a person includes, for example, the person's sweating state or the duration of a sitting state. For example, the sensor 50 may include a sensor for detecting the seating state of a person seated on the seat 1, or a camera for photographing the person. The sensor 50 for detecting the seating state may, for example, detect the seating state based on the vehicle's startup period, or may detect the seating state as a period during which the person's presence is continuously detected. The sensor 50 may also output information indicating the seating state to the control unit 60 as a detection result. Furthermore, the sensor 50 may detect the person's sweating state by photographing the person. The sensor 50 may also output information indicating the person's sweating state to the control unit 60 as a detection result.

[0116] [Control Unit 60]

[0117] The control unit 60 controls the blower 34 and the exhaust ventilation path selection switch 35. The control unit 60 is a microcomputer for turning on / off the current flowing to the blower 34 and the exhaust ventilation path selection switch 35, or controlling the output of the blower 34 by changing the current value.

[0118] The control unit 60 switches the mode of the exhaust ventilation path selection switch unit 35 by selecting any one of the first mode, the second mode, and the third mode. Alternatively, the control unit 60 may switch the mode of the exhaust ventilation path selection switch unit 35 based on at least one of the information indicating the temperature detected by the temperature sensor 51 and the information indicating the humidity detected by the humidity sensor 52.

[0119] For example, the control unit 60 may switch the mode of the exhaust ventilation path selection switch unit 35 based on the detection result of the sensor 50. Specifically, the control unit 60 may switch the mode of the exhaust ventilation path selection switch unit 35 based on the sweating state of the person detected by the sensor 50 using a camera or the like. Furthermore, the control unit 60 may switch the mode of the exhaust ventilation path selection switch unit 35 based on, for example, the temperature around the seat 1 when the person is seated in the seat 1.

[0120] Furthermore, the control unit 60 may also have a function of communicating with the control unit of the air conditioner mounted on the vehicle (hereinafter referred to as the air conditioner control unit 61). In this case, the control unit 60 can send the detection result of the sensor 50 to the air conditioner control unit 61 or receive the operating status of the air conditioner. Figure 3 The following description will be made assuming that the control unit 60 and the air-conditioning control unit 61 are electrically connected as shown.

[0121] [Power supply unit 70]

[0122] The power supply unit 70 is a power supply circuit that supplies power to the blower 34 and the exhaust ventilation path selection switch unit 35 via the control unit 60 and other devices. The power supply unit 70 is a DC power supply supplied from a battery (not shown). The power supply unit 70 is controlled by the control unit 60 to adjust the current supplied to the blower 34 and the exhaust ventilation path selection switch unit 35.

[0123] <Processing>

[0124] Figure 5 This is a flowchart showing the processing of the seat air conditioning device 3 according to the embodiment.

[0125] First, if Figure 5 As shown, the sensor 50 detects the status of the seat 1 and the status of the person seated in the seat 1 (S11). Specifically, the sensor 50 outputs information indicating the temperature of the seat 1, information indicating the humidity of the seat 1, etc. to the control unit 60 as the status of the seat 1, or outputs information indicating the sweating status of the person, information indicating the sitting period, etc. to the control unit 60 as the status of the person seated in the seat 1. The following mainly describes the information indicating the temperature.

[0126] The control unit 60 determines whether the first condition is satisfied based on the state of the seat 1 and the state of the person sitting on the seat 1 as a result acquired from the sensor 50 ( S12 ).

[0127] For example, based on information indicating the temperature of seat 1, if the temperature of seat 1 is above a predetermined temperature (e.g., 20°C or above), it is assumed that the temperature inside seat 1 is high and heat is remaining in seat 1. In this case, if air is blown out from second outlet 33a, warm air will be blown onto the person's head, neck, and shoulder area, causing discomfort. Furthermore, even if cold air is blown onto the person's head, neck, and shoulder area after the surrounding temperature stabilizes, the person may still feel uncomfortable. Therefore, the control unit 60 determines whether a first condition is satisfied as a determination item. Examples of situations in which the first condition is satisfied include immediately after a person sits in seat 1 (specifically, immediately after boarding the vehicle), when the person is sweating, when seated for an extended period, or immediately after the air conditioner is activated to heat the air around seat 1, such as when the seat heater is turned on. The control unit 60 communicates with the air conditioning control unit 61 to receive information indicating conditions such as immediately after the air conditioner is activated. In this case, the control unit 60 may also receive information indicating whether the air conditioner is operating in cooling or heating mode. The same applies to the second and third conditions. Furthermore, the control unit 60 may also determine whether the first condition is satisfied based on information indicating humidity as a determination item. For example, if the first condition is a first humidity level of 90% or higher (humidity 90% or higher), the first condition may be determined to be satisfied in the same manner as described above.

[0128] When the control unit 60 determines that the first condition is satisfied (YES in S12 ), it selects the first mode and switches the mode of the exhaust ventilation path selection switch unit 35 to cause the exhaust ventilation path selection switch unit 35 to execute the first mode ( S13 ).

[0129] Figure 6 a is a schematic plan view showing the flow path of air in the seat back 13 when the first mode is executed, and a schematic top view of the seat portion 10, Figure 6 FIG. b is a schematic side view of the seat 1. Figure 6 a and Figure 6 As shown in Figure b, when the exhaust ventilation path selection switching unit 35 is in the first mode, air drawn in through the first vent 12a of the seat surface 11c of the seat 1 is directed to the first air inlet 31a, drawn in through the first air inlet 31a, and directed to the first ventilation path 31. After reaching the exhaust ventilation path selection switching unit 35, it is directed to the second ventilation path 32 and discharged from the first outlet 32a. It is then blown out of the seat 1 through the second vent 12b. This allows warm air to be blown toward the back and waist, for example, rather than toward the head, neck, or acromion. This creates an airflow that surrounds the lower part of the upper body, extending from the buttocks and thighs. Furthermore, even if cool air is not discharged from the first outlet 32a when the head, neck, or acromion is sweating, the heat of vaporization from the sweat can still be expected to cool the head, neck, and acromion. Furthermore, when a person sits in seat 1 for a long period of time, or when a seat heater is turned on during heating by an air conditioner, the first mode can be executed to prevent the area of ​​contact between the person and seat 1 from becoming stuffy. The control unit 60 terminates the process. The control unit 60 then repeats the process from step S11 onward.

[0130] In addition, when the control unit 60 determines that the first condition is not satisfied ("No" in S12), it determines whether the second condition is satisfied based on the state related to the seat 1 and the state of the person sitting on the seat 1 as a result obtained from the sensor 50 (S14).

[0131] For example, based on information indicating the temperature of seat 1 , if the temperature of seat 1 is below a predetermined temperature (e.g., below 20°C), the temperature inside seat 1 is considered low. For example, if a person's back or waist is soaked with sweat, then if air is blown out from first outlet 32a, cold air will be blown onto the person's back or waist, potentially causing them to become excessively cold. Therefore, control unit 60 determines whether the second condition is satisfied as a determination item. The second condition is satisfied, for example, when the temperature around seat 1 is lowered by an air conditioner used to condition the air around seat 1 and the person's back or waist is soaked with sweat. Alternatively, control unit 60 may determine whether the second condition is satisfied as a determination item based on information indicating humidity. For example, if the humidity is below the first humidity and below the second humidity (less than 90% and above 70%), the second condition may be determined to be satisfied in the same manner as described above.

[0132] When the control unit 60 determines that the second condition is satisfied (YES in S14 ), it selects the second mode and switches the mode of the exhaust ventilation path selection switch unit 35 to cause the exhaust ventilation path selection switch unit 35 to execute the second mode ( S15 ).

[0133] Figure 7 a is a schematic plan view showing the flow path of air in the seat back 13 when the second mode is executed, and a schematic top view of the seat portion 10, Figure 7 FIG. b is a schematic side view of the seat 1. Figure 7 a and Figure 7 As shown in FIG. 5 b, when the exhaust ventilation path selection switching unit 35 is in the second mode, air drawn in through the first vent 12a of the seat surface 11c of the seat 1 is directed to the first air inlet 31a, drawn in through the first air inlet 31a, and directed to the first ventilation path 31. After reaching the exhaust ventilation path selection switching unit 35, the air is directed to the third ventilation path 33 and discharged from the second outlet 33a, where it is blown out of the seat 1 through the third vent 12c. This allows air to be blown toward the head, neck, and acromion, rather than toward the back and waist, creating an airflow that surrounds the upper part of the upper body, buttocks, and thighs. Furthermore, by blowing air toward the head, neck, and acromion, the person seated in the seat 1 can suppress the sympathetic nervous system's autonomic nervous system activity and, in turn, activate the parasympathetic nervous system, thereby promoting relaxation. The control unit 60 terminates the process. The control unit 60 then repeats the process from step S11 onward.

[0134] When the control unit 60 determines that the second condition is not satisfied (NO in S14 ), it determines that the third condition is satisfied based on the state of the seat 1 and the state of the person sitting in the seat 1 as a result acquired from the sensor 50 .

[0135] For example, based on information indicating the temperature of seat 1, if the temperature of seat 1 is below a predetermined temperature (e.g., below 20°C), the temperature inside seat 1 is considered low. For example, during periods of high sunlight or when sitting for long periods, a person's body can be enveloped in heat, causing the back and waist to become stuffy, leading to a desire to cool the entire body. Alternatively, there may be a desire to reduce the energy consumption of the air conditioner. The control unit 60 may also determine whether a third condition is satisfied as a determination item. Examples of situations where the first and second conditions are not satisfied, i.e., situations where the third condition is satisfied, include situations where the temperature around seat 1 is lowered using an air conditioner, situations where the back and waist are engulfed in heat, and situations where a desire to reduce the energy consumption of the air conditioner is present. Furthermore, the control unit 60 may determine whether the third condition is satisfied as a determination item based on information indicating humidity. For example, if the third condition is lower than the second humidity (less than 70%), the third condition may be similarly determined to be satisfied.

[0136] When determining that the third condition is satisfied, the control unit 60 selects the third mode and switches the mode of the exhaust ventilation path selection switch unit 35 to cause the exhaust ventilation path selection switch unit 35 to execute the third mode ( S16 ).

[0137] Figure 8 a is a schematic plan view showing the flow path of air in the seat back 13 when the third mode is executed, and a schematic top view of the seat portion 10, Figure 8 FIG. b is a schematic side view of the seat 1. Figure 8 a and Figure 8 As shown in FIG. 5 b, when the exhaust ventilation path selection switching unit 35 is in the third mode, air drawn in through the first vent 12a of the seat surface 11c of the seat 1 is directed to the first air inlet 31a, drawn in through the first air inlet 31a, and directed to the first ventilation path 31. After reaching the exhaust ventilation path selection switching unit 35, the air is directed to the second and third ventilation paths 32 and 33, and discharged from the first and second outlets 32a and 33a. The air is then blown out of the seat 1 through the second and third vents 12b and 12c. This allows air to be blown toward, for example, the head, neck, shoulder blades, back, and waist of a person, thereby generating an airflow that encompasses the person's entire upper body, extending from the buttocks and thighs. Furthermore, by blowing air toward the entire upper body of a person, the entire body can be cooled, the back and waist can be reduced, and the energy consumption of the air conditioner can be reduced. The control unit 60 then terminates the process. The control unit 60 then repeats the process starting from step S11.

[0138] In this processing example, with respect to the temperature and humidity of the seat 1 , priority may be given to the temperature over the humidity.

[0139] By repeatedly performing the above-described processing, the control unit 60 can freely switch from the first mode to the third mode when the state of the seat 1 or the state of the person in the seat 1 changes.

[0140] Here, an example will be described in which the control unit 60 switches the exhaust ventilation path selection switch unit 35 to the first mode, then to the second mode, and then to the third mode when driving the blower 34 .

[0141] If the control unit 60 determines, based on information from the air conditioning control unit 61, that it is summer and a person has just entered the vehicle, it first determines that the first condition is satisfied and switches the exhaust ventilation path selection switch 35 to the first mode, which is then executed. This information from the air conditioning control unit 61 may include, for example, information indicating activation of the air conditioning control unit 61 or information indicating input operations performed on the air conditioner's operating unit. As a result, air is first discharged from the first outlet 32a toward the person's back and waist, thereby cooling the sweating back and waist using the vaporized heat of sweat.

[0142] Next, if the control unit 60 determines, based on information from the air conditioning control unit 61, that the air conditioner's cooling has begun, it determines that the second condition has been met and switches the exhaust ventilation path selection switch 35 to the second mode, which is then executed. This information from the air conditioning control unit 61 may include, for example, information indicating the temperature near the air conditioner's air outlet or the temperature inside the vehicle cabin. As a result, air is discharged from the second exhaust outlet 33a toward the person's head, neck, and shoulder area. However, since cooling has begun, the discharged air is also cooled. Discharging this air toward the head, neck, and shoulder area effectively cools the person and prevents excessive cooling of the back and lower back.

[0143] Next, if the control unit 60 determines, based on information from the air conditioning control unit 61, that the air conditioner's cooling effect has improved, it determines that the third condition has been satisfied and switches the exhaust ventilation path selection switch unit 35 to the third mode, which is then executed. This information from the air conditioning control unit 61 may include, for example, information indicating the temperature near the air conditioner's air outlet or the temperature inside the vehicle cabin. As a result, by discharging air from both the first outlet 32a and the second outlet 33a, the air inside the vehicle cabin is discharged so that it surrounds the entire body of the person, thereby providing a more comfortable air-conditioned environment for the seated occupant.

[0144] Alternatively, the control unit 60 may switch the exhaust ventilation route selection switch unit 35 to the first mode when at least one of the temperature detected by the temperature sensor 51 and the humidity detected by the humidity sensor 52 is stable within a predetermined range. Specifically, when at least one of the first conditions of the temperature being within the predetermined range of 25°C ± 1°C and the humidity (relative humidity) being within the predetermined range of 70% ± 5% is satisfied, the control unit 60 switches the exhaust ventilation route selection switch unit 35 to the first mode and executes the first mode. Specifically, "stable within the predetermined range" means within a predetermined range of ± a few degrees Celsius relative to the temperature detected by the temperature sensor 51 and within a predetermined range of ± a few percent relative to the humidity detected by the humidity sensor 52 over a predetermined period.

[0145] As a result, when at least one of the temperature and humidity remains stable within the specified range, the air conditioner maintains stable cooling. Therefore, when the exhaust ventilation path selection switch 35 is switched to the first mode, air is discharged from the back and waist, rather than the head, neck, or acromion. This prevents overcooling of the head, neck, and acromion, while maintaining a comfortable air-conditioned environment by maintaining a surrounding airflow from the back and waist to the legs.

[0146] <Effects>

[0147] Next, the effects of the seat air conditioner 3 according to the present embodiment will be described.

[0148] As described above, the seat air conditioning device 3 of the present embodiment is a seat air conditioning device 3 for a seat 1, and includes: a blower 34; a first ventilation path 31 for guiding air sucked in from a first air inlet 31a by the blower 34, the first air inlet 31a being provided in a seat portion 10 of the seat 1 for seating a person; a second ventilation path 32 for discharging the air guided to the first ventilation path 31 by the blower 34 from a first outlet 32a provided in the seat 1; a third ventilation path 33 which is different from the second ventilation path 32. The third ventilation path 33 is used to discharge air directed to the first ventilation path 31 by the blower 34 through a second outlet 33a provided on the seat 1; and an exhaust ventilation path selection and switching unit 35 is provided closer to the first outlet 32a and the second outlet 33a than the blower 34. The exhaust ventilation path selection and switching unit 35 selects at least one of the second ventilation path 32 and the third ventilation path 33 for the air directed to the first ventilation path 31 and switches the selected ventilation path. Furthermore, the first air inlet 31a, the first ventilation path 31, the blower 34, the exhaust ventilation path selection and switching unit 35, the second ventilation path 32, the first outlet 32a, the third ventilation path 33, and the second outlet 33a are built into the seat 1. Moreover, the first air inlet 31a is arranged at a position vertically below the first exhaust port 32a and the second exhaust port 33a, and draws air from the surface of the seat 10 on the side where a person sits, namely the seat surface 11c. The first ventilation path 31 is set in the seat 10, and reaches the exhaust ventilation path selection switching unit 35 from the first air inlet 31a via the blower 34.

[0149] Thus, the blower 34 can draw air from the first air intake port 31a provided in the seat 1, that is, it can draw in air circulated around the seat 1. For example, compared to conventional seat air conditioners used in vehicles, which directly supply a portion of the cold or warm air conditioned by the vehicle's air conditioner to the seat, in this embodiment, the cold or warm air directly discharged by the seat air conditioner 3 is less likely to be consumed by the seat 1. Therefore, air conditioned by the air conditioner throughout the vehicle interior is drawn in through the first air intake port 31a, discharged from at least the first discharge port 32a or the second discharge port 33a, and blown toward the person seated in the seat 1, thereby cooling or warming the person.

[0150] Therefore, the seat air conditioning device 3 can suppress a decrease in air conditioning efficiency.

[0151] In particular, since the first air inlet 31a is positioned vertically below the first and second air outlets 32a, 33a, it is possible to provide the first air inlet 31a in locations corresponding to a person's lower limbs, and the first and second air outlets 32a, 33a in locations corresponding to a person's upper torso. In this case, air is drawn in through the first air inlet 31a on the seat surface 11c, located near the person's body, generating an airflow near the body. This drawn-in air is then discharged through at least the first and second air outlets 32a, 33a, thereby blowing air toward the person. This generates an airflow that surrounds the person's body, allowing conditioned air to remain around the person seated in the seat 1, providing a comfortable air-conditioned environment with minimal air conditioning energy. More specifically, since air can be drawn in through the first air inlet 31a formed on the seat surface 11c of the seat 1, it is possible to suppress the stuffiness caused by perspiration in the buttocks and thighs of the person in contact with the seat surface 11c. Furthermore, since the first and second air outlets 32a and 33a are positioned vertically above the first air inlet 31a, air can be blown toward the upper body of the person. In other words, airflow is generated from the upper body toward the buttocks and thighs, allowing conditioned air to remain around the person seated in the chair 1, providing a more comfortable air-conditioned environment with minimal air conditioning energy.

[0152] Furthermore, in the summer, when a person sits in a vehicle while sweating, air is particularly exhausted from the buttocks because the first air inlet 31a is located vertically below the first and second air outlets 32a, 33a relative to the seat 1. This prevents air from being exhausted from the buttocks. Consequently, unnecessary cooling of the sweating buttocks, which could cause discomfort, can be suppressed.

[0153] Conventional vehicle seat air conditioners draw in air exhausted from the cabin air conditioning unit. However, in the summer, immediately after a person sits in the vehicle, the cabin air conditioning unit is not fully activated, drawing in warm air before exhausting cool air. Consequently, so-called warm air is discharged toward the person, sometimes causing discomfort. In contrast, the seat air conditioner 3 of this embodiment does not directly draw in exhaust air from the air conditioner, thus minimizing discomfort caused by the exhaust of warm air.

[0154] Furthermore, the first air inlet 31a, the first ventilation path 31, the blower 34, the exhaust ventilation path selection switching unit 35, the second ventilation path 32, the first exhaust outlet 32a, the third ventilation path 33 and the second exhaust outlet 33a constituting the seat air conditioning device 3 are built into the seat 1, thereby simplifying the structure.

[0155] Furthermore, in the seat air conditioning device 3 of the present embodiment, the first outlet 32 ​​a is arranged vertically below the second outlet 33 a .

[0156] Thus, by providing the first outlet 32a and the second outlet 33a at locations corresponding to, for example, the upper body of a person, air can be blown downwardly through the first outlet 32a, or upwardly through the second outlet 33a. This allows for localized cooling or heating by blowing air to specific areas of the body, thereby allowing conditioned air to remain around the person seated in the seat 1, providing a more comfortable air-conditioned environment with minimal air conditioning energy.

[0157] In the seat air conditioning device 3 of the present embodiment, the exhaust ventilation path selection switching unit 35 has a first mode for exhausting air from the first exhaust port 32 a by guiding the air guided to the first ventilation path 31 only to the second ventilation path 32 .

[0158] This allows air to be blown toward the lower side of a person's upper body, such as the buttocks and waist, while preventing air from being blown toward the upper side of the person's upper body, such as the head and neck. Air discharged from first outlet 32a and blown toward the lower side of the person's upper body is then drawn in through first air inlet 31a of seat surface 11c. In other words, this air is drawn from first outlet 32a through the lower side of the upper body of the person seated in seat 1 into first air inlet 31a. This creates an airflow that surrounds the lower side of the person's upper body, extending all the way to the buttocks and thighs.

[0159] As a specific example, the first mode can be used to prevent the area of ​​the seat 1 in contact with the person from becoming stuffy when a person sits in seat 1 for an extended period, or when the seat heater is on while the air conditioner is heating the area surrounding seat 1. As another example, the first mode, which prevents air from being discharged from second outlet 33a, can be used to prevent the air from reaching the person's warm head and neck, thereby minimizing the discomfort of excessive cooling. This allows the conditioned air to remain around the person seated in seat 1, providing a more comfortable air-conditioned environment with minimal air conditioning energy.

[0160] In the seat air conditioning device 3 of the present embodiment, the exhaust ventilation path selection switching unit 35 has a second mode for exhausting air from the second exhaust port 33 a by guiding the air guided to the first ventilation path 31 only to the third ventilation path 33 .

[0161] This allows, for example, air to be blown toward the upper part of a person's upper body, such as the head and neck, while preventing air from being blown toward the lower part of the upper body, such as the buttocks and waist. Air discharged from the second outlet 33a and blown toward the upper part of the person's upper body is then drawn in through the first air inlet 31a of the seat surface 11c. In other words, this air is drawn from the second outlet 33a through the upper part of the person's upper body and into the first air inlet 31a. This creates an airflow that surrounds the upper part of the person's upper body, as well as the buttocks and thighs.

[0162] To give a specific example, even if the air conditioner lowers the temperature around seat 1 to cool off any remaining heat, the person's back and waist may still become soaked with sweat. In this case, executing the second mode prevents the person's back and waist from becoming excessively cold, while also cooling the shoulder blades, neck, and head. This allows the conditioned air to remain around the person seated in seat 1, providing a more comfortable air-conditioned environment with minimal air conditioning energy.

[0163] In addition, in the seat air conditioning device 3 of this embodiment, the exhaust ventilation path selection switching unit 35 has a third mode, which is used to discharge air from the first exhaust port 32a and the second exhaust port 33a at the same time by guiding the air guided to the first ventilation path 31 to the second ventilation path 32 and the third ventilation path 33 at the same time.

[0164] Thus, the air discharged from the first outlet 32a and the second outlet 33a and blown toward the person is drawn in through the first air inlet 31a of the seat surface 11c. In other words, the air is drawn in through the first air inlet 31a from the first outlet 32a and the second outlet 33a via the person seated on the seat 1. Thus, an airflow is generated that surrounds substantially the entire person's body, from the entire upper body to the buttocks and thighs.

[0165] To give a specific example, even if the air conditioner lowers the temperature around seat 1 to dissipate residual heat, the person's body may still be enveloped in heat during periods of high sunlight or when seated for extended periods. In such cases, the third mode can be activated to cool the person's entire body. Furthermore, if the air conditioner's energy consumption is to be reduced, the third mode can also be activated to cool the person's entire body. This allows conditioned air to remain around the person seated in seat 1, providing a more comfortable air-conditioned environment while also reducing energy consumption for the entire system, including the air conditioner.

[0166] In addition, the seat air conditioning device 3 of the present embodiment is provided with a control unit 60, which controls the blower 34 and the exhaust ventilation path selection switching unit 35. The exhaust ventilation path selection switching unit 35 has: a first mode, which is used to discharge air from the first exhaust outlet 32a by guiding the air guided to the first ventilation path 31 only to the second ventilation path 32; a second mode, which is used to discharge air from the second exhaust outlet 33a by guiding the air guided to the first ventilation path 31 only to the third ventilation path 33; and a third mode, which is used to discharge air from the first exhaust outlet 32a and the second exhaust outlet 33a at the same time by guiding the air guided to the first ventilation path 31 to the second ventilation path 32 and the third ventilation path 33 at the same time. The control unit 60 switches the mode of the exhaust ventilation path selection switching unit 35 by selecting any one mode from the first mode, the second mode and the third mode.

[0167] According to this, the control unit 60 can select any one of the first mode, the second mode, and the third mode, and thus can appropriately perform cooling or heating according to the state and desire of the person.

[0168] Furthermore, the seat air conditioning device 3 of this embodiment includes at least one of a temperature sensor 51 and a humidity sensor 52. The control unit 60 switches the mode of the exhaust ventilation path selection switching unit 35 based on at least one of information indicating the temperature detected by the temperature sensor 51 and information indicating the humidity detected by the humidity sensor 52.

[0169] This allows the temperature and humidity near the seat to be detected, allowing the exhaust ventilation path selection switch to be switched to create a comfortable air flow. Furthermore, the results of the temperature and humidity detection can be output to an air conditioner, for example. The air conditioner can then perform air conditioning based on the temperature and humidity detection results.

[0170] Furthermore, in the seat air conditioning device 3 of the present embodiment, at least one of the temperature sensor 51 and the humidity sensor 52 is disposed in the first ventilation path 31 or the exhaust ventilation path selection switching portion 35 .

[0171] This allows for highly accurate detection of the temperature and humidity of the seat surface. Specifically, it allows for highly accurate detection of the temperature corresponding to the buttocks and thighs of a person seated in seat 1, and the humidity corresponding to the area between the buttocks and thighs and the seat surface 11c. This allows the exhaust path selection switch 35 to be switched to create a more comfortable air flow.

[0172] In addition, in the seat air conditioning device 3 of this embodiment, the first outlet 32a is arranged at a position corresponding to at least one of the back and waist of a person, and the second outlet 33a is arranged at a position corresponding to at least one of the head, neck and acromion of a person.

[0173] Thus, when air is discharged from the first outlet 32a, it can be blown to at least one of the person's back and waist. When air is discharged from the second outlet 33a, it can be blown to at least one of the person's head, neck, and shoulder blades. This allows the person's body to be cooled or warmed locally, or even substantially cooled or warmed throughout the entire body. This allows the conditioned air to remain around the person seated in the chair 1, providing a more comfortable air-conditioned environment with minimal air conditioning energy consumption.

[0174] In the seat air conditioning device 3 of the present embodiment, the control unit 60 switches the exhaust ventilation path selection switch unit 35 to the first mode, then to the second mode, and then to the third mode when driving the blower 34 .

[0175] Accordingly, especially in the summer, from the time a person just sits in the vehicle until the cooling of the air conditioner progresses, seat air conditioning is performed in a mode that adapts to the ever-changing environment inside the vehicle, so that the conditioned air can stay around the person sitting on the seat 1, and a more comfortable air-conditioned environment can be provided with minimal air-conditioning energy.

[0176] In addition, in the seat air conditioning device 3 of the present embodiment, when at least one of the temperature and the humidity is stable within a prescribed range based on at least one of the information indicating the temperature detected by the temperature sensor 51 and the information indicating the humidity detected by the humidity sensor 52, the control unit 60 switches the exhaust ventilation path selection switching unit 35 to the first mode.

[0177] Accordingly, when the cooling by the air conditioner is stable, the air is discharged from the back and waist, and not to the head, neck and acromion, thereby preventing the head, neck and acromion from being overcooled, and maintaining a comfortable air-conditioned environment by maintaining an air flow that surrounds the back and waist to the legs.

[0178] (Variation 1 of the embodiment)

[0179] This variation differs from the seat air conditioning system 3 of the embodiment in that the first ventilation path 131 also communicates with the second air intake port 31b. Unless otherwise specified, the remaining structures of this variation are identical to those of the embodiment. Identical structures and functions are denoted by the same reference numerals, and detailed descriptions thereof are omitted.

[0180] Figure 9 It is a perspective view showing the appearance of a seat 1 equipped with a seat air conditioning device 3 a according to a modification of the embodiment and a cross-sectional view of the seat.

[0181] like Figure 9 As shown, the first ventilation path 131 communicates with the second air inlet 31b, which is a different air inlet from the first air inlet 31a. Specifically, the first ventilation path 131 has a communication hole 31c that forms the second air inlet 31b. In this embodiment, the communication hole 31c extends from the second air inlet 31b in the Z-axis direction and connects to the first ventilation path 131. The second air inlet 31b is formed on a surface of the seat 1 other than the seat surface 11c. In this embodiment, the second air inlet 31b is formed on the surface opposite to the seat surface 11c (the surface on the negative Z-axis side of the seat portion 10). The second air inlet 31b can draw in air around the bottom of the seat 1. The air drawn in from the first and second air inlets 31a, 31b, is mixed between the first and second air inlets 31a, 31b, and the exhaust ventilation path selection switch 35, and then is directed to at least one of the second and third ventilation paths 32, 33.

[0182] In addition, the second air inlet 31b may be arranged to face the air outlet of an air conditioner mounted on the vehicle. In other words, cold air or warm air discharged from the air conditioner may be sucked into the second air inlet 31b and mixed with the air flowing in the first ventilation path 131.

[0183] In the seat air conditioning device 3 a of this modified example, the first ventilation path 131 communicates with the second air intake 31 b , which is a different air intake from the first air intake 31 a and is formed on a surface other than the seat surface 11 c of the seat 1 .

[0184] Thus, the first ventilation path 131 communicates not only with the first air inlet 31a but also with the second air inlet 31b. This allows the air drawn in through the first air inlet 31a between the seat surface 11c and the person seated, and the air drawn in through the second air inlet 31b formed outside the seat surface 11c (here, the air around the bottom of the seat 1) to mix. This actively draws in air from the area surrounding the seat 1, providing a more comfortable air-conditioned environment for the person seated in the seat 1.

[0185] This modification also exhibits the same operational effects as described above.

[0186] (Variation 2 of the embodiment)

[0187] This modification differs from the seat air conditioning unit 3 of the embodiment in that first air inlets 31a are formed in the center and outer edges of the seat surface 11c. Specifically, first air inlets 31a are formed in the rear side portion 11d, front end portion 11e, and side portions 11f of the seat surface 11c, which serve as the outer edges. Unless otherwise specified, the remaining structures of this modification are identical to those of the embodiment. Identical structures and functions are denoted by the same reference numerals, and detailed descriptions of these structures and functions are omitted.

[0188] Figure 10 It is a perspective view showing the appearance of a seat 1 equipped with a seat air conditioning device 3 b according to a second modification of the embodiment.

[0189] like Figure 10 As shown, the first air inlet 31a is formed in the center and outer edge of the seat surface 11c. Here, the outer edge includes the rear side 11d, front end 11e, and side portions 11f of the seat surface 11c. While the outer edge is assumed to include all of the rear side 11d, front end 11e, and side portions 11f, it is sufficient that the outer edge includes at least one of the rear side 11d and front end 11e. Thus, air is guided into the first ventilation path 31 through the first air inlet 31a provided at both the center and outer edge.

[0190] Thus, air can be drawn in between the buttocks and thighs and the seat surface 11c through the first air inlet 31a formed in the center of the seat surface 11c, thereby reducing stuffiness in the buttocks and thighs. Furthermore, the first air inlet 31a formed in the outer edges of the seat surface 11c (the rear side 11d, the front end 11e, and the side portions 11f), particularly those formed in the rear side 11d and the front end 11e, are located in positions less likely to be covered by the buttocks and thighs. This allows air around the seat to be drawn in. For example, even if air cannot be drawn in through the first air inlet 31a formed in the center of the seat surface 11c, air can still be drawn in through the first air inlet 31a formed in the outer edge of the seat surface 11c, allowing air to be discharged through the first and second outlets 32a and 33a.

[0191] (Variation 3 of the embodiment)

[0192] This modified example differs from the seat air conditioning unit 3 of the embodiment in that the seat air conditioning unit 3c further includes a second air intake 31b located at a different position from the first air intake 31a, a fourth ventilation path 31c1 connected to the second air intake 31b, and an air intake / ventilation path selection / switching unit 36 ​​connected to the first ventilation path 31 and the fourth ventilation path 31c1. Unless otherwise specified, the remaining configuration of this modified example is the same as that of the embodiment. Identical configurations and functions are denoted by the same reference numerals, and detailed descriptions of these configurations and functions are omitted.

[0193] Figure 11 It is a perspective view showing the appearance of a seat 1 equipped with a seat air conditioning device 3 c according to a third modification of the embodiment and a cross-sectional view of the seat 1 .

[0194] like Figure 11 As shown in FIG. 3 , the second air inlet 31b is arranged at a position different from that of the first air inlet 31a. Figure 9 Similarly, the surface formed on the Z-axis negative side of the seat portion 10 can inhale the air around the bottom of the seat 1. Figure 11 The second air intake 31b may be connected to a vehicle-mounted air conditioning unit (not shown). The second air intake 31b is connected to a fourth ventilation path 31c1, which is connected to an intake ventilation path selection and switching unit 36. Similarly, the first ventilation path 31, which is connected to the first air intake 31a, is also connected to the intake ventilation path selection and switching unit 36.

[0195] The intake ventilation path selection and switching unit 36 ​​has the function of selecting at least one of the first ventilation path 31 and the fourth ventilation path 31c1. Since the intake ventilation path selection and switching unit 36 ​​is connected to the blower 34, air from the selected ventilation path is drawn in by the blower 34. The intake ventilation path selection and switching unit 36 ​​is electrically connected to the control unit 60, so the control unit 60 can select at least one of the first ventilation path 31 and the fourth ventilation path 31c1.

[0196] According to such a configuration, the blower 34 is connected between the intake ventilation path selection switching unit 36 ​​and the exhaust ventilation path selection switching unit 35 .

[0197] Here, the selection modes of the intake ventilation path selection switching unit 36 ​​are defined as follows. First, a mode in which the first ventilation path 31 is connected to the blower 34 is defined as a fourth mode. Next, a mode in which the fourth ventilation path 31c1 is connected to the blower 34 is defined as a fifth mode. Next, a mode in which both the first ventilation path 31 and the fourth ventilation path 31c1 are connected to the blower 34 is defined as a sixth mode. Therefore, the control unit 60 switches the mode of the intake ventilation path selection switching unit 36 ​​by selecting any one mode from the fourth mode, the fifth mode, and the sixth mode. According to this structure, the control unit 60 can perform the following control: air is sucked in from at least one of the first air inlet 31a and the second air inlet 31b, and air is blown out from at least one of the first exhaust port 32a and the second exhaust port 33a.

[0198] Next, the operation of the seat air conditioning system 3c of this modified example will be described. Generally, as described in the embodiment, the control unit 60 controls any of the first through third modes based on the outputs of the temperature sensor 51 and the humidity sensor 52. Simultaneously, the control unit 60 controls any of the fourth through sixth modes. Regarding this control, for example, if the outputs of the temperature sensor 51 and the humidity sensor 52 exceed a predetermined threshold, the air intake and ventilation path selection and switching unit 36 ​​is controlled to the fifth mode to actively introduce air that has been temperature-controlled by the air conditioner. Furthermore, if the outputs of the temperature sensor 51 and the humidity sensor 52 tend to fall below the predetermined threshold, the air intake and ventilation path selection and switching unit 36 ​​is controlled to the sixth mode to introduce air from the seat surface 11c to generate an airflow that surrounds the person. Furthermore, if the outputs of the temperature sensor 51 and the humidity sensor 52 are below the predetermined threshold and stable, the air intake and ventilation path selection and switching unit 36 ​​is controlled to the fourth mode to generate only an airflow that surrounds the person. Furthermore, if the outputs of the temperature sensor 51 and the humidity sensor 52 fluctuate, the control unit 60 may compare the outputs with predetermined threshold values ​​to control the intake ventilation path selection switching unit 36 ​​to the above-mentioned optimal mode.

[0199] Thus, the air drawn in through the first air inlet 31a between the seat surface 11c and the person and the air drawn in through the second air inlet 31b formed outside the seat surface 11c can be selected and mixed. If the temperature of the air drawn in through the second air inlet 31b is different from the temperature of the air drawn in through the first air inlet 31a, selecting and mixing these allows for more precise temperature adjustment, thereby providing a more comfortable air-conditioned environment for the person seated in the chair 1.

[0200] Next, the operation when a person enters a vehicle in midsummer will be described. For example, when the vehicle doors are unlocked from an unused state and the air conditioner determines that the vehicle interior temperature is above a threshold (for example, 30°C), the control unit 60 performs the following operation.

[0201] First, (1) the control unit 60 switches the intake ventilation path selection switch unit 36 ​​to the fourth mode (intake only from the seat surface 11c) and switches the exhaust ventilation path selection switch unit 35 to the first mode (exhaust only toward the waist and back). By the action of (1), when the air conditioner cannot blow out cool air immediately after the vehicle is first used, air is blown only toward the waist and back, thereby providing a cooling sensation through the vaporization heat of sweat. At this time, the neck and shoulders are not blown, thereby preventing them from being exposed to warm air.

[0202] Next, (2) the control unit 60 switches the intake ventilation path selection switch unit 36 ​​to the fifth mode (intake from outside the seat surface 11c) and switches the exhaust ventilation path selection switch unit 35 to the second mode (exhaust only toward the neck and shoulders). Through the action (2), when the air conditioner starts blowing out cool air, the cool air is actively introduced through the second air inlet 31b, and the air supply to the sweat-soaked waist and back is stopped (to prevent overcooling), and the air is blown out from the neck and shoulders, cooling the body.

[0203] Next, (3) the control unit 60 switches the intake ventilation path selection switch 36 to the sixth mode (intake from both the seat surface 11c and outside the seat surface 11c). The exhaust ventilation path selection switch 35 remains in the second mode (exhaust only toward the neck and shoulders). Through the action of (3), air is also taken in from the first air inlet of the seat surface 11c, and an airflow that surrounds the person begins to be generated, thereby improving comfort.

[0204] Next, (4) the control unit 60 switches the intake ventilation path selection switch 36 to the fourth mode (intake only from the seat surface 11c). The exhaust ventilation path selection switch 35 remains in the second mode (exhaust only toward the neck and shoulders). Through the action (4), only airflow surrounding the person is generated, and the introduction of cold air from the air conditioner is stopped to prevent overcooling.

[0205] Next, (5) the control unit 60 switches the exhaust ventilation path selection switch 35 to the third mode (exhausting air toward both the waist and back and the neck and shoulders). The intake ventilation path selection switch 36 remains in the fourth mode (intake from the seat surface 11c only). By the action of (5), air is not only supplied to the neck and shoulders, but also to the waist and back, thereby suppressing the heat that can envelop the waist and back during long periods of riding.

[0206] Furthermore, (1) to (5) performed by the control unit 60 are switched based on the elapsed time from boarding the vehicle and the outputs of the temperature sensor 51 and the humidity sensor 52 .

[0207] According to this, by including such an operation process in the control of the control unit 60, it is possible to improve the comfort when riding in the vehicle, especially in midsummer.

[0208] (Variation 4 of the embodiment)

[0209] This modification differs from the seat air conditioning device 3c of Modification 3 in that, when the intake air path selection and switching unit 36 ​​remains in the fourth mode or the sixth mode throughout the first predetermined period, the control unit 60 switches the intake air path selection and switching unit 36 ​​to the fifth mode and causes the exhaust air path selection and switching unit 35 to alternately switch between the first mode and the second mode throughout the second predetermined period. Unless otherwise specified, the remaining structure of this modification is the same as that of Modification 3. Identical structures and functions are denoted by the same reference numerals, and detailed descriptions of these structures and functions are omitted.

[0210] Figure 12 This is a flowchart showing the processing of the seat air conditioning device 3 c according to the fourth modification of the embodiment.

[0211] The structure of the seat air conditioner 3c of this modification is similar to that described in Modification 3. Figure 11 The same construction is used below, so Figure 12 The characteristic operation of this modification example will be described.

[0212] The control unit 60 repeatedly executes the Figure 12 The action of the flowchart. When executing Figure 12 , the control unit 60 determines whether the air intake ventilation path selection switching unit 36 ​​is currently in the fourth mode (intake from the seat surface 11c only) or the sixth mode (intake from both the seat surface 11c and the outside of the seat surface 11c) (step S21). If it is not in any mode, that is, if it is in the fifth mode (intake from outside the seat surface 11c) ("No" in S21), for example, it is assumed that the interior of the vehicle is very hot after just using the vehicle and the air conditioner is actively exhausting the cold air, so it can be determined that the driver's attention is maintained. Therefore, the control unit 60 ends Figure 12 Flowchart of the process.

[0213] On the other hand, if it is the fourth mode or the sixth mode ("Yes" in S21), the control unit 60 determines whether to execute Figure 12The process then checks whether the first predetermined period has elapsed since the start of the flowchart (step S22). The first predetermined period is defined as the period until the driver's anxiety is relieved by the continuation of the comfortable state of the fourth or sixth mode, and is, for example, 30 minutes. If the first predetermined period has not elapsed ("No" in S22), the process returns to step S21, and the control unit 60 repeats the operations from step S21 onward.

[0214] On the other hand, if the first predetermined period has elapsed (YES in S22 ), it is assumed that the driver's stress has been interrupted, and the control unit 60 executes the following operation for calling the driver's attention.

[0215] First, the control unit 60 switches the intake ventilation path selection switching unit 36 ​​to the fifth mode (intake of air from outside the seat surface 11c) (step S23). Thereby, the comfortable airflow surrounding the person is interrupted. Next, the control unit 60 switches the exhaust ventilation path selection switching unit 35 alternately between the first mode (discharge toward the waist and back) and the second mode (discharge toward the neck and shoulders) (step S24). Here, as a timing for alternating switching, it is set to be every 30 seconds, for example, which is assumed to be able to arouse the driver's attention. Through such an action, the comfortable airflow toward the driver is interrupted, and the air is blown toward the waist and back and toward the neck and shoulders alternately and repeatedly, so that the discomfort of the air conditioner is felt. Thus, attention can be aroused by the interruption of tension.

[0216] Next, the control unit 60 determines whether a second predetermined period has elapsed since the initial start of the process in step S23 (step S25). Here, the second predetermined period is, for example, five minutes, which is assumed to be sufficient to draw the driver's attention by imparting the aforementioned discomfort. If the second predetermined period has not elapsed ("No" in S25), the control unit 60 returns to step S23 and repeats the processes from step S23 onward.

[0217] On the other hand, if the second predetermined period has elapsed ("YES" in S25), it is assumed that the driver's attention has been called, and the control unit 60 switches the intake ventilation path selection switching unit 36 ​​and the exhaust ventilation path selection switching unit 35 to execute Figure 12 The mode before the flowchart (original mode) (step S26). Then, end Figure 12 Flowchart of the process.

[0218] Accordingly, while continuously generating an airflow surrounding the person, especially when the driver's tension is relieved, air from the air conditioner, whose temperature is different from the temperature of the seat surface (first air intake 31a), is inhaled only from the second air intake 31b and blown alternately toward the driver's waist and back as well as the neck and shoulders, thereby attracting the driver's attention.

[0219] (Other modifications, etc.)

[0220] As mentioned above, although this disclosure was demonstrated based on embodiment and the modification of embodiment, this disclosure is not limited to these embodiment and the modification of embodiment, etc.

[0221] For example, in the seat air conditioning device 3 according to each of the above-described embodiments and their variations, the seat 1 may be equipped with a seat heater. The seat heater is installed in at least one of the seat portion 10 and the seat back 13 of the seat 1 in a vehicle or the like, and generates heat to warm the back, waist, buttocks, thighs, and other areas of the seat. The seat heater heats the seat 1 in a heating setting and does not heat the seat 1 in a non-heating setting. The seat heater may be positioned between the first seat cushion 11a and the first seat cover 11b, or between the second seat cushion 13a and the second seat cover 13b. The seat heater may include a base material and a heater wire. The base material may be a sheet-like nonwoven fabric or a foamed resin such as polyurethane formed in a cloth-like shape, which is elastic, flexible, and ductile. The heater wire may be a conductive wire electrically connected to a control unit 60 that controls the power supplied to the heater wire and heated by power from a power supply unit 70 controlled by the control unit 60. The control unit 60 may be capable of controlling the amount of heat generated by the heater wire by turning on / off the current flowing through the heater wire or by changing the current value.

[0222] In addition, in the seat air conditioning device involved in the above-mentioned embodiments and modifications of the embodiments, the control unit can also switch the mode of the exhaust ventilation path selection switching unit by automatically selecting any one mode from the first mode, the second mode and the third mode, or can manually switch the mode of the exhaust ventilation path selection switching unit through human operation.

[0223] In addition, in the seat air conditioning device involved in the above-mentioned embodiments and modifications of the embodiments, the control unit can also obtain information indicating the temperature inside the vehicle cabin, information indicating the humidity inside the vehicle cabin, etc. from temperature sensors, humidity sensors, etc. installed in the vehicle, and automatically select any one mode from the first mode, the second mode, and the third mode in accordance with the information indicating the temperature inside the vehicle cabin, information indicating the humidity inside the vehicle cabin, etc. obtained from the temperature sensors and humidity sensors serving as sensors of the seat air conditioning device.

[0224] The processing units included in the seat air conditioning devices according to the above-described embodiments and their modifications are typically implemented as LSIs, which are integrated circuits. These units may be implemented individually or in part or in whole on a single chip.

[0225] Furthermore, integrated circuits are not limited to LSIs and can also be implemented using dedicated circuits or general-purpose processors. FPGAs (Field Programmable Gate Arrays) that can be programmed after LSI manufacturing, or reconfigurable processors that allow the connections and settings of circuit cells within the LSI to be reconfigured, can also be used.

[0226] In addition, in each of the above-mentioned embodiments and their variations, each component may be formed of dedicated hardware or implemented by executing a software program suitable for each component. Each component may also be implemented by a program execution unit such as a CPU or a processor reading a software program recorded on a recording medium such as a hard disk or semiconductor memory and executing the software program.

[0227] In addition, the numbers used above are all exemplified in order to specifically describe the present disclosure, and the embodiments and modifications of the embodiments of the present disclosure are not limited to the exemplified numbers.

[0228] The division of functional blocks in the block diagram is merely an example. It is also possible to implement multiple functional blocks as one functional block, or to divide one functional block into multiple functional blocks, or to transfer some functions to other functional blocks. Furthermore, it is also possible to process the functions of multiple functional blocks with similar functions in parallel or in a time-sharing manner by a single piece of hardware or software.

[0229] In addition, the order in which each step in the flowchart is executed is an example order for specifically explaining the present disclosure, and therefore an order other than the above may be used. In addition, some of the above steps may be executed simultaneously (in parallel) with other steps.

[0230] In addition, the present disclosure also includes methods obtained by implementing various modifications that a person skilled in the art would think of to the embodiments and their modifications, and methods achieved by arbitrarily combining the constituent elements and functions in the embodiments and their modifications without departing from the spirit of the present disclosure.

[0231] Industrial applicability

[0232] The present disclosure can be applied to seats for mobile objects such as vehicles, sofas, and the like, for example.

[0233] Description of Reference Numerals

[0234] 1: seat; 3, 3a, 3b, 3c: seat air conditioning device; 10: seat portion; 31, 131: first ventilation path; 31a: first air inlet; 31b: second air inlet; 31c1: fourth ventilation path; 32: second ventilation path; 32a: first exhaust outlet; 33: third ventilation path; 33a: second exhaust outlet; 34: blower; 35: exhaust ventilation path selection switching unit; 36: intake ventilation path selection switching unit; 51: temperature sensor; 52: humidity sensor; 60: control unit.

Claims

1. A seat air conditioning device, which is a seat air conditioning device for a seat, comprising: blower; a first ventilation path for guiding air sucked in by the blower from a first air inlet provided in a seat portion of the chair for seating a person; a second ventilation path for discharging the air guided to the first ventilation path by the blower from a first discharge port provided on the seat; a third ventilation path, which is a ventilation path different from the second ventilation path, and is used to discharge the air guided to the first ventilation path by the blower from a second discharge port provided on the seat; as well as an exhaust ventilation path selection and switching unit, which is provided at a position closer to the first exhaust outlet and the second exhaust outlet than the blower, and selects at least one ventilation path of the second ventilation path and the third ventilation path for the air guided to the first ventilation path and switches the selected ventilation path; The first air inlet, the first ventilation path, the blower, the exhaust ventilation path selection switch, the second ventilation path, the first exhaust outlet, the third ventilation path, and the second exhaust outlet are built into the seat. The first air inlet is arranged vertically below the first and second air outlets and draws air from the seat surface on the side where a person sits. The first ventilation path is provided in the seat portion, and extends from the first air inlet through the blower to the exhaust ventilation path selection switch portion.

2. The seat air conditioning device according to claim 1, wherein: The first discharge outlet is arranged vertically below the second discharge outlet.

3. The seat air conditioning device according to claim 2, wherein: The exhaust ventilation path selection switching portion has a first mode for exhausting air from the first exhaust port by guiding the air guided to the first ventilation path only to the second ventilation path.

4. The seat air conditioning device according to claim 2 or 3, wherein: The exhaust ventilation path selection switching portion has a second mode for exhausting air from the second exhaust port by guiding the air guided to the first ventilation path only to the third ventilation path.

5. The seat air conditioning device according to claim 2 or 3, wherein: The exhaust ventilation path selection switching portion has a third mode for simultaneously exhausting air from the first exhaust outlet and the second exhaust outlet by simultaneously guiding the air guided to the first ventilation path to the second ventilation path and the third ventilation path.

6. The seat air conditioning device according to claim 1 or 2, wherein: The device further comprises a control unit that controls the blower and the exhaust ventilation path selection switch unit. The exhaust ventilation path selection switching unit includes: a first mode for discharging air from the first discharge port by directing the air directed to the first ventilation path only to the second ventilation path; a second mode for discharging air from the second discharge port by directing the air directed to the first ventilation path only to the third ventilation path; as well as a third mode for simultaneously discharging air from the first and second exhaust outlets by simultaneously directing the air directed to the first ventilation path to the second and third ventilation paths; The control unit switches the mode of the exhaust ventilation path selection switch unit by selecting any one mode from among the first mode, the second mode, and the third mode.

7. The seat air conditioning device according to claim 6, wherein: further comprising at least one of a temperature sensor and a humidity sensor, The control unit switches a mode of the exhaust ventilation path selection switching unit based on information indicating the temperature detected by the temperature sensor and information indicating the humidity detected by the humidity sensor.

8. The seat air conditioning device according to claim 7, wherein: At least one of the temperature sensor and the humidity sensor is disposed in the first ventilation path or the exhaust ventilation path selection switch.

9. The seat air conditioning device according to claim 6, wherein: When driving the blower, the control unit switches the exhaust ventilation path selection switch unit first to the first mode, then to the second mode, and then to the third mode.

10. The seat air conditioning device according to claim 9, wherein: The control unit switches the exhaust ventilation path selection switch unit to the first mode when at least one of the temperature and the humidity is stable within a predetermined range based on at least one of information indicating the temperature detected by the temperature sensor and information indicating the humidity detected by the humidity sensor.

11. The seat air conditioning device according to any one of claims 1 to 3, wherein: The first ventilation path is connected to a second air inlet, and the second air inlet is an air inlet different from the first air inlet, The second air inlet is formed on a surface of the seat other than the seat surface.

12. The seat air conditioning device according to any one of claims 1 to 3, wherein: The first outlet is arranged at a position corresponding to at least one of the back and waist of a person. The second discharge outlet is arranged at a position corresponding to at least one of a head, a neck, and a shoulder.

13. The seat air conditioning device according to any one of claims 1 to 3, wherein: The first air inlet is formed at a central portion and an outer edge portion of the seat surface.

14. The seat air conditioning device according to claim 13, wherein: The outer edge portion is at least one of a rear side portion and a front end portion of the seat surface.

15. The seat air conditioning device according to claim 6, wherein: The air intake device further comprises a second air intake port arranged at a position different from the first air intake port, a fourth ventilation path connected to the second air intake port, and an air intake ventilation path selection and switching unit connected to the first ventilation path and the fourth ventilation path. The air intake ventilation path selection switching unit is connected to the control unit. The blower is connected between the intake ventilation path selection switch unit and the exhaust ventilation path selection switch unit. The air intake ventilation path selection switching unit has a fourth mode for connecting the first ventilation path to the blower, a fifth mode for connecting the fourth ventilation path to the blower, and a sixth mode for connecting the first ventilation path and the fourth ventilation path to the blower. The control unit switches the mode of the intake ventilation path selection switching unit by selecting any one mode from among the fourth mode, the fifth mode, and the sixth mode.

16. The seat air conditioning device according to claim 15, wherein: The control unit has the following action process: (1) switching the intake ventilation path selection switching unit to the fourth mode, and switching the exhaust ventilation path selection switching unit to the first mode; (2) switching the intake ventilation path selection switching unit to the fifth mode, and switching the exhaust ventilation path selection switching unit to the second mode; (3) switching the intake ventilation path selection switching unit to the sixth mode; (4) switching the intake ventilation path selection switching unit to the fourth mode; (5) switching the exhaust ventilation path selection switching unit to the third mode.

17. The seat air conditioning device according to claim 15, wherein: When the intake ventilation path selection switching unit remains in the fourth mode or the sixth mode throughout the first prescribed period, the control unit switches the intake ventilation path selection switching unit to the fifth mode throughout the second prescribed period, and alternately switches the exhaust ventilation path selection switching unit between the first mode and the second mode.

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