JP2019137322A - Seat air-conditioning device - Google Patents

Abstract

To inhibit occurrence of blood flow stagnation of a passenger who sits on a seat for a transportation movable body while reducing time and effort and a troublesome of the passenger.SOLUTION: A seat air-conditioning device includes a seat air-conditioning unit 204 provided for each seat of a transportation movable body and blowing individual air-conditioning winds to occupants siting on the seats; and a temperature control unit 205 for controlling temperature of air-conditioning winds blown from the seat air-conditioning unit. The temperature control unit 205 controls the temperature of air-conditioning winds so that the air-conditioning winds blown from the seat air-conditioning unit 204 are alternately switched to warm winds and cool winds.SELECTED DRAWING: Figure 3

Description

  The present disclosure relates to a seat air conditioner installed for each seat of a transporting mobile body.

  It is known that blood flow stagnation occurs when an occupant sits on a seat of a transporting mobile body such as an airplane or a vehicle for a long time. It is effective to move the body moderately to eliminate the blood flow stagnation, but the distance between the sheets of the transporting mobile body is often not enough to move the body freely and move the legs It is difficult to eliminate the stagnation of blood flow.

  On the other hand, Patent Document 1 discloses a technique for promoting blood circulation by manually sending air to a bag belt wound around a calf and repeating contraction and expansion.

Utility Model Registration No. 3149204

  However, in the technique disclosed in Patent Document 1, there are troubles for an occupant to wind the bag belt around the calf and manual air supply to the bag belt, and inconvenience that the bag belt must be continuously attached to the calf.

  One object of this disclosure is to provide a seat air conditioner that makes it possible to suppress the stagnation of blood flow in an occupant sitting on a seat of a transporting mobile body while reducing the labor and annoyance of the occupant. It is to provide.

  The above object is achieved by a combination of the features described in the independent claims, and the subclaims define further advantageous embodiments of the disclosure. Reference numerals in parentheses described in the claims indicate correspondence with specific means described in the embodiments described later as one aspect, and do not limit the technical scope of the present disclosure. .

  In order to achieve the above object, a seat air conditioner according to the present disclosure is provided for each seat (Se) of a transporting mobile body, and allows a passenger sitting on the seat to blow individual conditioned air (204). ) And a temperature control unit (205) for controlling the temperature of the conditioned air blown out by the seat air-conditioning unit. The temperature control unit alternately switches the conditioned air blown out by the seat air-conditioning unit between hot air and cold air Control the temperature of the conditioned air.

  According to this, it becomes possible to blow out the individual conditioned air that is alternately switched between the hot air and the cold air to the occupant seated on the seat of the transportation vehicle. When individual air-conditioning air blown out to the occupant is alternately switched between hot air and cold air, a blood vessel expansion / contraction action occurs in the occupant and blood flow increases. Therefore, it is possible to suppress the occurrence of blood flow stagnation in the occupant seated on the seat of the transportation vehicle. In addition, since the blood vessel expansion / contraction action is caused to the occupant by the conditioned air, it is possible to reduce the time and effort required for the occupant to perform the work to cause the blood vessel expansion / contraction action. In addition, since the vascular expansion / contraction action is generated on the occupant by the conditioned air, the occupant's troublesomeness can be reduced as compared with the case where the occupant wears some device to generate the vascular expansion / contraction action. As a result, it is possible to suppress the stagnation of blood flow in the occupant sitting on the seat of the transporting mobile body while reducing the labor and troublesomeness of the occupant.

1 is a diagram illustrating an example of a schematic configuration of a seat air conditioning system 1. FIG. It is a figure which shows an example of the installation position of the sheet | seat air conditioner 2, and the blowing position of the conditioned air by the sheet | seat air conditioner. It is a figure which shows an example of a schematic structure of seat air conditioning ECU20. It is a flowchart which shows an example of the flow of the individual air conditioning related process in seat air conditioning ECU20. It is a figure which shows an example of a schematic structure of seat air conditioning ECU20a. It is a flowchart which shows an example of the flow of the separate air conditioning related process in seat air conditioning ECU20a. It is a figure which shows an example of a schematic structure of seat air conditioning ECU20b. It is a flowchart which shows an example of the flow of the individual air conditioning related process in seat air conditioning ECU20b.

  A plurality of embodiments for disclosure will be described with reference to the drawings. For convenience of explanation, among the embodiments, parts having the same functions as those shown in the drawings used in the explanation so far may be given the same reference numerals and explanation thereof may be omitted. is there. For the parts denoted by the same reference numerals, the description in other embodiments can be referred to.

(Embodiment 1)
<Schematic configuration of seat air conditioning system 1>
Hereinafter, the present embodiment will be described with reference to the drawings. A seat air-conditioning system 1 shown in FIG. 1 is used in a transportation vehicle such as a passenger car, a bus, a railway vehicle, a ship, and an aircraft, and includes a seat air-conditioner 2, a seat sensor 3, and a seat HMI (Human Machine Interface) 4. Is included. The seat air-conditioning system 1 is provided for each seat (that is, a seat) of the transporting mobile body. Below, the case where automobiles, such as a passenger car and a bus, are used as an example of the transporting mobile body is described as an example.

  The seat air conditioner 2 is provided for each seat and performs individual air conditioning (hereinafter referred to as individual air conditioning) for passengers seated on the seat. Therefore, the seat air conditioner 2 performs individual air conditioning for each seat provided. Details of the seat air conditioner 2 will be described later.

  The seat sensor 3 is a sensor group for detecting various states such as a seating state of an occupant on the seat and a biological state of the occupant seated on the seat. Examples of the seat sensor 3 include a seating sensor composed of a pressure-sensitive element provided on the seating surface of the seat, a non-invasive pulse wave sensor provided on the seat, and the like. The seat sensor 3 outputs the detection result to the seat air conditioner 2.

  The seat HMI 4 is provided for each seat, and accepts operation inputs such as air conditioning settings and illumination settings from the occupants seated on the seats, and displays the operating state of the seat air conditioner 2 on the seats. . The seat HMI 4 receives, via an operation input unit, on / off setting of the seat air-conditioning device 2 from the occupant seated on the seat, setting of the temperature of the conditioned air, setting of the air volume of the conditioned air, and the like. In addition, the seat HMI 4 accepts an on / off setting of a reading lamp from an occupant seated on the seat via the operation input unit. An example of the operation input unit may be a mechanical switch or a touch switch integrated with a display. The seat HMI 4 outputs the received setting information to the seat air conditioner 2. The setting of air conditioning or the like may be configured such that the seat HMI 4 receives from a portable terminal carried by the occupant, for example, by short-range wireless communication via a communication module provided for each seat.

<Schematic configuration of seat air conditioner 2>
Subsequently, a schematic configuration of the seat air conditioner 2 will be described with reference to FIGS. 1 and 2. As described above, the seat air conditioner 2 is provided for each seat and performs individual air conditioning for the occupant seated on the seat. The seat air conditioner 2 may be configured to be provided below the seat surface of the seat (see Se in FIG. 2), for example, as shown in FIG. As shown in FIG. 1, the seat air conditioner 2 includes a seat air conditioner ECU 20, a refrigeration cycle device 21, a heating device 22, a first blower 23, a second blower 24, an air mix damper 25, and a switching damper 26.

  The refrigeration cycle apparatus 21 cools air using a refrigerant vapor compression refrigeration cycle, and includes a compressor 211, a condenser 212, a decompression unit 213, and an evaporator 214. The bypass line 100 is a closed circuit through which the refrigerant flows, and the compressor 211, the condenser 212, the decompression unit 213, and the evaporator 214 are provided in the bypass line that is a closed circuit through which the refrigerant flows. The refrigerant may be configured to use chlorofluorocarbon gas having a small global warming coefficient such as R134a and R152a or HC gas such as propane.

  The compressor 211 is an electric compressor that is driven by a DC voltage supplied from an in-vehicle battery, and compresses the refrigerant flowing through the bypass pipe to increase the refrigerant temperature. The compressor 211 sucks the low-pressure refrigerant, pressurizes the low-pressure refrigerant, and discharges the high-pressure refrigerant. The compressor 211 may be an engine-driven compressor that is driven by an engine mounted on an automobile. The compressor 211 supplies the compressed high-pressure refrigerant to the condenser 212.

  The condenser 212 radiates the heat of the refrigerant by providing heat exchange between the air blown by the first blower 23 and the refrigerant. The condenser 212 is also called a heat radiator. The refrigerant radiated by the condenser 212 is supplied to the decompression unit 213. The decompression unit 213 generates a low-temperature and low-pressure refrigerant by decompressing the refrigerant supplied from the condenser 212 and supplies the low-temperature and low-pressure refrigerant to the evaporator 214.

  The evaporator 214 cools the air blown by the second blower 24 by providing heat exchange between the air blown by the second blower 24 and the low-temperature refrigerant. Thereby, the air blown by the 2nd air blower 24 turns into cold wind, and is supplied to the duct Du for blowing (refer FIG. 2). Further, the refrigerant cooled by the evaporator 214 is supplied to the compressor 211. The evaporator 214 is also called a heat absorber. Thus, while the refrigerant circulates through the refrigeration cycle device 21, the air blown by the second blower 24 is cooled, and the cold air is supplied to the blowing duct Du.

  The heating device 22 is an electric heater including a PTC heater, a hot wire heater, and the like, and heats the warm air that has passed through the condenser 212 to further raise the temperature of the warm air. The warm air heated by the heating device 22 is also supplied to the blowing duct Du.

  The air mix damper 25 is provided in a connection flow path that connects the blowout port for the cool air cooled by the evaporator 214 and the blowout port for the hot air heated by the heating device 22 and the blowout duct Du. The air mix damper 25 adjusts the amount of the cool air discharged from the cool air outlet through the outlet duct Du and the amount of the hot air discharged from the hot air outlet through the outlet duct Du. Thus, the temperature of the conditioned air supplied to the blowing duct Du is adjusted.

  The switching damper 26 is provided upstream of a plurality of outlets (see ND, BD, TD, and CD in FIG. 2) of the outlet duct Du, and individually opens and closes each outlet. The switching damper 26 may be configured to open and close the air outlet by being driven by an actuator such as a servo motor, for example.

  As an example of the outlet of the outlet duct Du, as shown in FIG. 2, the outlet ND between the seat back and the headrest, the outlet BD of the seat back, the outlet TD of the seat surface of the seat, and the seat base The air outlet CD on the front side of. The conditioned air blown from each outlet (see arrows in FIG. 2) is such that the outlet ND hits the occupant's neck, the outlet BD hits the occupant's back, the outlet TD hits the buttocks and thighs, and the outlet CD hits the calf. It has become. The air outlet may be provided so as to hit another part of the occupant seated on the seat, or only a part of the above may be provided.

  The seat air conditioning ECU 20 is mainly composed of a processor, a memory, an I / O, and a microcomputer having a bus connecting them, and executes various processes related to individual air conditioning by executing a control program stored in the memory. The execution of this control program by the processor corresponds to the execution of a method corresponding to the control program. The memory here is a non-transitory tangible storage medium that stores computer-readable programs and data in a non-temporary manner. The non-transitional tangible storage medium is realized by a semiconductor memory or a magnetic disk. Details of the processing in the seat air conditioning ECU 20 will be described below.

<Schematic configuration of seat air conditioning ECU 20>
Here, a schematic configuration of the seat air conditioning ECU 20 will be described with reference to FIG. The seat air conditioning ECU 20 includes an operation information acquisition unit 201, a seating detection unit 202, a trigger detection unit 203, a seat air conditioning unit 204, a temperature control unit 205, and a switching control unit 206 as functional blocks. Note that part or all of the functions executed by the seat air conditioning ECU 20 may be configured in hardware by one or a plurality of ICs. Further, part or all of the functional blocks provided in the seat air conditioning ECU 20 may be realized by a combination of software execution by a processor and hardware members.

  The operation information acquisition unit 201 acquires operation information indicating the content of the operation input received by the sheet HMI4 from the sheet HMI4. The seating detection unit 202 detects the seating of an occupant on the seat based on the detection result of the seating sensor in the seat sensor 3.

  The trigger detection unit 203 detects, as a trigger, that a predetermined time elapses after the seating detection unit 202 detects the seating of the passenger on the seat. This trigger corresponds to a predetermined trigger for estimating sleep or fatigue of the occupant. Moreover, what is necessary is just to let the predetermined time said here be time estimated that a passenger | crew's sleep or fatigue will arise by continuing sitting.

  The seat air-conditioning unit 204 performs individual air-conditioning by starting the operations of the refrigeration cycle device 21, the first blower 23, and the second blower 24. The seat air-conditioning unit 204 may turn on / off the individual air-conditioning according to the operation information about the on / off setting of the seat air-conditioning apparatus 2 acquired by the operation information acquiring unit 201.

  The temperature control unit 205 adjusts the temperature of the conditioned air of the individual air conditioning by turning on / off the operation of the heating device 22 or adjusting the air mix damper 25. The temperature control unit 205 adjusts the temperature of the conditioned air according to the temperature setting according to the operation information about the temperature setting of the conditioned air of the seat air conditioner 2 acquired by the operation information acquisition unit 201. The temperature adjustment of the conditioned air according to the temperature setting received from the passenger by the seat HMI4 is hereinafter referred to as a normal mode.

  Further, when the trigger detection unit 203 detects the trigger, the temperature control unit 205 adjusts the temperature of the conditioned air so that the conditioned air blown out by the seat air-conditioning unit 204 is alternately switched between hot air and cold air ( That is, control). According to this, when the conditioned air is alternately switched between the warm air and the cold air, a blood vessel expansion / contraction action is generated in the occupant, the blood flow volume is increased, and the blood flow is improved. The temperature adjustment of the air-conditioning air that alternately switches between the hot air and the cold air is hereinafter referred to as a blood flow improvement mode. In order to further enhance the effect of improving blood flow, a configuration may be adopted in which hot air and cold air are switched at intervals of 1 to 2 minutes. The hot air and the cold air here may be a wind having a temperature higher than the room temperature of the transporting mobile body and a wind having a temperature lower than the room temperature, and the temperature difference between them is, for example, constant ( For example, the wind may be 30 ° C. or higher, or may be a predetermined temperature. In the example of the present embodiment, the temperature of the hot air is 40 to 42 ° C., and the temperature of the cold air is 10 to 15 ° C.

  In the blood flow improvement mode, not only the hot air and the cold air are alternately switched, but also the adjustment for alternately switching the hot air and the cold air is repeated for a set time, and then the process proceeds to the temperature adjustment of the air conditioning air as in the normal mode. It is preferable to do. According to this, after improving the occupant's blood flow, it is possible to secure the occupant's comfort while improving the occupant's blood flow by shifting to the temperature adjustment of the conditioned air as in the normal mode. .

  In addition, after shifting to the temperature adjustment of the conditioned air as in the normal mode, the process returns to the process of repeating the adjustment for alternately switching between the warm air and the cool air after the predetermined time described above, and the hot air and the cool air are alternately switched. More preferably, the switching adjustment and the same adjustment as in the normal mode are periodically repeated. According to this, it becomes possible to improve a passenger | crew's blood flow over a long term, ensuring a passenger | crew's comfort.

  The switching control unit 206 adjusts the switching damper 26 to adjust the air outlet that blows out the conditioned air of the individual air conditioning. The switching control unit 206 may be configured to blow conditioned air from all of the air outlets ND, BD, TD, and CD, for example, in the normal mode when the trigger detection unit 203 does not detect the trigger. In addition, when the setting of the air outlet for blowing out the conditioned air can be received by the seat HMI 4, the operation information about the setting of the air conditioned air outlet of the seat air conditioner 2 acquired by the operation information acquisition unit 201 is used. What is necessary is just to set it as the structure which adjusts the blower outlet of an air conditioned wind so that a setting may be followed.

  In addition, when the trigger detection unit 203 detects a trigger, that is, in the blood flow improvement mode, the switching control unit 206, at least in the air outlet TD, adjusts the conditioned air adjusted so as to switch alternately between hot air and cold air. And then blown out from the outlet CD. In other words, the conditioned air adjusted so as to switch alternately between hot air and cold air is blown out toward at least the passenger's thigh and then blown out toward the passenger's calf. As an example, after the conditioned air adjusted so as to be switched alternately between hot air and cold air is blown out from the outlet TD for about 10 minutes, it is blown out from the outlet CD for about 10 minutes. According to this, since the blood flow of the thigh and calf where blood flow is likely to be stagnated is improved along the flow of blood flow, the blood flow can be improved more effectively.

  In addition, although the structure which blows off the air-conditioning wind adjusted so that it may switch alternately to warm air and cold air in order of the thigh to the calf was shown here, it does not necessarily restrict to this. For example, it is good also as a structure which blows off in order from the center side of a passenger | crew's blood flow to the peripheral side other than the order of a thigh to a calf. Moreover, when a trigger is detected by the trigger detection unit 203, the configuration may be such that the outlet from which the conditioned air is blown is limited rather than before the trigger is detected, or may be the same configuration as before the trigger is detected.

<Individual air conditioning related processing in the seat air conditioning ECU 20>
Next, an example of a flow of processing related to individual air conditioning in the seat air conditioning ECU 20 (hereinafter, individual air conditioning related processing) will be described using the flowchart of FIG. The flowchart of FIG. 4 may be configured to start when the individual air conditioning is started by the seat air conditioner 2.

  First, in step S1, when a predetermined time has elapsed since the seating detection unit 202 detected the seating of an occupant on the seat (YES in S1), the process proceeds to step S4. On the other hand, when the predetermined time has not elapsed since the seating detection unit 202 detected the seating of the passenger on the seat (NO in S1), the process proceeds to step S2.

  In step S2, the temperature control unit 205 performs individual air conditioning in the normal mode described above. In addition, what is necessary is just to set the switching control part 206 as the structure which blows off an air conditioned wind from all the blower outlets ND, BD, TD, CD as mentioned above, for example.

  In step S3, when it is the end timing of the individual air conditioning related process (YES in S3), the individual air conditioning related process is terminated. On the other hand, if it is not the end timing of the individual air conditioning related process (NO in S3), the process returns to S1 and the process is repeated. As an example of the end timing of the individual air conditioning related processing, the seating detection unit 202 can no longer detect the seating of an occupant on the seat, and the setting of the individual air conditioning is turned off.

  In step S4, the temperature control unit 205 performs individual air conditioning in the blood flow improvement mode described above. Note that, as described above, the switching control unit 206 blows out the conditioned air adjusted so as to switch alternately between hot air and cold air, for example, from the outlet TD for 10 minutes, and then blows out from the outlet CD for 10 minutes. What is necessary is just to make it the structure made to do. When the adjustment for alternately switching between the hot air and the cold air is repeated for a set time, and when shifting to the temperature adjustment of the conditioned air similar to the normal mode, the switching control unit 206, for example, the air outlets ND, BD, TD, CD What is necessary is just to set it as the structure which blows off air-conditioning wind from all.

  In step S5, when it is the end timing of the individual air conditioning related process (YES in S5), the individual air conditioning related process is terminated. On the other hand, if it is not the end timing of the individual air conditioning related process (NO in S5), the process returns to S4 and is repeated.

<Summary of Embodiment 1>
According to the configuration of the first embodiment, it is possible to blow out individual conditioned air that alternately switches between hot air and cold air to the occupant seated on the seat of the transportation vehicle. When the individual air-conditioning air blown to the occupant is alternately switched between hot air and cold air, the vascular expansion and contraction action occurs in the occupant and the blood flow increases, so it is possible to suppress the stagnation of blood flow in the occupant become. In addition, since the blood vessel expansion / contraction action is caused to the occupant by the conditioned air, it is possible to reduce the time and effort required for the occupant to perform the work to cause the blood vessel expansion / contraction action. In addition, since the vascular expansion / contraction action is generated on the occupant by the conditioned air, the occupant's troublesomeness can be reduced as compared with the case where the occupant wears some device to generate the vascular expansion / contraction action. As a result, it is possible to suppress the stagnation of blood flow in the occupant sitting on the seat of the transporting mobile body while reducing the labor and troublesomeness of the occupant.

  In addition, according to the configuration of the first embodiment, the occupant is alternately switched between hot air and cold air, triggered by the occupant's seating longer than the time estimated to cause sleep or fatigue of the occupant by continuing to sit. Blow out individual conditioned air. Therefore, until the time when the occupant's body movement decreases due to sleep or fatigue and the blood flow tends to stagnate, the temperature of the conditioned air is adjusted according to the temperature setting received from the occupant, and the blood flow becomes a time when blood flow tends to stagnate. It becomes possible to make improvements. Accordingly, it is possible to suppress blood flow stagnation while ensuring passenger comfort. In addition, since a predetermined time elapses after detecting the seating of an occupant on the seat, the stagnation of blood flow is ensured while ensuring the comfort of the occupant without requiring the occupant to perform work. Can be suppressed.

(Embodiment 2)
In the first embodiment, the configuration has been described in which a predetermined time elapses after detection of the seating of an occupant on the seat, but the present invention is not limited thereto. For example, it is good also as a structure (henceforth Embodiment 2) which makes it a trigger to detect a passenger | crew's sleep.

  Hereinafter, an example when the second embodiment is employed will be described. The seat air conditioning system 1 of the second embodiment is the same as the seat air conditioning system 1 of the first embodiment, except that the seat air conditioning device 2 includes a seat air conditioning ECU 20a instead of the seat air conditioning ECU 20.

<Schematic configuration of seat air conditioning ECU 20a>
Here, the seat air conditioning ECU 20a will be described with reference to FIG. As shown in FIG. 5, the seat air conditioning ECU 20a includes an operation information acquisition unit 201, a trigger detection unit 203a, a seat air conditioning unit 204, a temperature control unit 205, a switching control unit 206, a biological information acquisition unit 207, and a sleep detection unit 208. It is provided as a functional block. The seat air conditioning ECU 20a is implemented except that it does not include the seating detection unit 202, a point that includes the trigger detection unit 203a instead of the trigger detection unit 203, and a point that includes the biological information acquisition unit 207 and the sleep detection unit 208. This is the same as the seat air conditioning ECU 20 of the first embodiment.

  The biometric information acquisition unit 207 acquires biometric information of an occupant seated on the seat from the seat sensor 3. An example of biological information is a pulse wave detected by a pulse wave sensor. The sleep detection unit 208 detects whether or not the occupant sleeps based on the biological information acquired by the biological information acquisition unit 207. For example, the presence or absence of sleep may be detected based on whether or not the fluctuation of the pulse wave detected by the pulse wave sensor has a tendency during sleep.

  It should be noted that the present invention is not limited to the configuration using the pulse wave detected by the pulse wave sensor, and any other configuration may be used as long as it is biological information capable of detecting the presence or absence of sleep. For example, the presence or absence of sleep may be detected from the magnitude of body movement by detecting a change in load distribution on the seat surface by a seating sensor including a plurality of pressure sensitive elements provided on the seat surface. In addition, the biological information acquisition unit 207 acquires biological information such as a pulse wave and blood pressure measured by a wearable device that the occupant wears and carries, and a portable terminal via wireless communication, and the occupant's information is obtained based on the acquired biological information. It is good also as a structure which detects the presence or absence of sleep.

  The trigger detection unit 203a detects that the sleep detection unit 208 detects occupant sleep as a trigger. This trigger corresponds to a predetermined trigger for estimating the occupant's sleep. When the trigger is detected by the trigger detection unit 203a, the temperature control unit 205 performs individual air conditioning in the blood flow improvement mode. Further, the switching control unit 206 adjusts the air outlet in accordance with the blood flow improvement mode.

<Individual air conditioning related processing in the seat air conditioning ECU 20a>
Here, an example of the flow of the individual air conditioning related processing in the seat air conditioning ECU 20a will be described using the flowchart of FIG. The flowchart of FIG. 6 may be configured to start when individual air conditioning is started by the seat air conditioner 2.

  First, in step S21, when the sleep detection unit 208 detects sleep of an occupant (YES in S21), the process proceeds to step S24. On the other hand, when the sleep detection unit 208 does not detect the sleep of the passenger (NO in S21), the process proceeds to step S22. In step S22, the temperature control unit 205 performs individual air conditioning in the normal mode described above. Note that the switching control unit 206 may be the same as described in S2.

  In step S23, if it is the end timing of the individual air conditioning related process (YES in S23), the individual air conditioning related process is terminated. On the other hand, if it is not the end timing of the individual air conditioning related process (NO in S23), the process returns to S21 and the process is repeated. As an example of the end timing of the individual air conditioning related processing, the setting of the individual air conditioning is turned off, and the seating sensor no longer detects the seating of the passenger on the seat.

  In step S24, the temperature control unit 205 performs individual air conditioning in the above-described blood flow improvement mode. Note that the switching control unit 206 may be the same as described in S4. In step S25, when the sleep detection unit 208 no longer detects sleep of the passenger, that is, when waking is detected (YES in S25), the process proceeds to step S22. On the other hand, when the sleep detection unit 208 has not detected the awakening (NO in S25), the process proceeds to step S26.

  If it is the end timing of the individual air conditioning related process in step S26 (YES in S26), the individual air conditioning related process is terminated. On the other hand, if it is not the end timing of the individual air conditioning related process (NO in S26), the process returns to S24 and the process is repeated.

<Summary of Embodiment 2>
Since the configuration of the second embodiment is the same as that of the first embodiment except that the triggers are different, similar to the configuration of the first embodiment, the occupant seated on the seat of the transportation vehicle has a blood flow stagnation. It is possible to suppress the occurrence while reducing the labor and troublesomeness of the occupant.

  In addition, according to the configuration of the second embodiment, triggered by the detection of the occupant's sleep based on the occupant's biological information, the occupant is blown out with individual conditioned air that is alternately switched between hot air and cold air. . Therefore, adjust the temperature of the air-conditioning wind according to the temperature setting accepted from the occupant until the time when the occupant's body movement decreases due to sleep and the blood flow tends to stagnate. Improvements can be made. Therefore, it is possible to suppress the stagnation of blood flow after sleeping while ensuring comfort so that the introduction to sleep is not hindered by individual air conditioning air that alternates between hot air and cold air until the occupant sleeps Become. In addition, because it is triggered by detecting occupant sleep based on the occupant's biological information, the occupant's comfort is ensured and the stagnation of blood flow is suppressed without the need for the occupant to perform work. It becomes possible.

(Embodiment 3)
In the first embodiment, the configuration has been described in which a predetermined time elapses after detection of the seating of an occupant on the seat, but the present invention is not limited thereto. For example, it is good also as a structure (henceforth Embodiment 3) which makes it a trigger to detect operation of the switch for a passenger | crew to operate at the time of sleep or fatigue.

  Hereinafter, an example when the third embodiment is employed will be described. The seat air conditioning system 1 of the third embodiment is the same as the seat air conditioning system 1 of the first embodiment except that the seat air conditioning device 2 includes a seat air conditioning ECU 20b instead of the seat air conditioning ECU 20.

<Schematic configuration of seat air conditioning ECU 20b>
Here, the seat air conditioning ECU 20b will be described with reference to FIG. As shown in FIG. 7, the seat air conditioning ECU 20b includes an operation information acquisition unit 201, a trigger detection unit 203b, a seat air conditioning unit 204, a temperature control unit 205, a switching control unit 206, and an operation detection unit 209 as functional blocks. . The seat air-conditioning ECU 20b is the seat air-conditioning ECU 20 of the first embodiment, except that the seat air-conditioning ECU 20b does not include the seating detection unit 202, the point that the trigger detection unit 203b is provided instead of the trigger detection unit 203, and the point that the operation detection unit 209 is provided. It is the same.

  Based on the operation information acquired by the operation information acquisition unit 201, the operation detection unit 209 detects an operation of a switch for an occupant to operate during sleep or fatigue. For example, what is necessary is just to detect operation of the switch for a passenger | crew to operate at the time of sleep from the operation information which shows the content of the operation input which sets a reading lamp to ON. In addition, operation information indicating the contents of operation input for turning on the switch for indicating the intention of going to sleep by the occupant, and operation indicating the contents of operation input for setting the switch for indicating the intention of fatigue for the occupant. From the information, it is only necessary to detect the operation of a switch for the passenger to operate at the time of sleep or fatigue. Moreover, it is good also as a structure which detects operation of the switch for a passenger | crew to operate at the time of sleep or fatigue from the operation information which shows the content of the operation input set to blood flow improvement mode.

  The trigger detection unit 203b detects, as a trigger, that the operation detection unit 209 detects an operation of a switch (hereinafter referred to as a manual switch) for an occupant to operate during sleep or fatigue. This trigger corresponds to a predetermined trigger for estimating sleep or fatigue of the occupant. When the trigger is detected by the trigger detection unit 203b, the temperature control unit 205 performs individual air conditioning in the blood flow improvement mode. Further, the switching control unit 206 adjusts the air outlet in accordance with the blood flow improvement mode.

<Individual air conditioning related processing in the seat air conditioning ECU 20b>
Here, an example of the flow of the individual air conditioning related processing in the seat air conditioning ECU 20b will be described using the flowchart of FIG. The flowchart of FIG. 8 may be configured to start when individual air conditioning is started by the seat air conditioner 2.

  First, in step S41, when the operation detecting unit 209 detects an operation for turning on the manual switch (YES in S41), the process proceeds to step S44. On the other hand, if the operation detecting unit 209 has not detected an operation to turn on the manual switch (NO in S41), the process proceeds to step S42. In step S42, the temperature control unit 205 performs individual air conditioning in the normal mode described above. Note that the switching control unit 206 may be the same as described in S2.

  In step S43, if it is the end timing of the individual air conditioning related process (YES in S43), the individual air conditioning related process is terminated. On the other hand, if it is not the end timing of the individual air conditioning related process (NO in S43), the process returns to S41 and the process is repeated. As an example of the end timing of the individual air conditioning related processing, the setting of the individual air conditioning is turned off, and the seating sensor no longer detects the seating of the passenger on the seat.

  In step S44, the temperature control unit 205 performs individual air conditioning in the blood flow improvement mode described above. Note that the switching control unit 206 may be the same as described in S4. In step S45, when an operation to turn off the manual switch is detected (YES in S45), the process proceeds to step S42. On the other hand, when an operation to turn off the manual switch is not detected (NO in S45), the process proceeds to step S46.

  In step S46, if it is the end timing of the individual air conditioning related process (YES in S46), the individual air conditioning related process is terminated. On the other hand, if it is not the end timing of the individual air conditioning related process (NO in S46), the process returns to S44 and the process is repeated.

<Summary of Embodiment 3>
Since the configuration of the third embodiment is the same as that of the first embodiment except that the triggers are different, similar to the configuration of the first embodiment, the occupant seated on the seat of the transportation vehicle has a blood flow stagnation. It is possible to suppress the occurrence while reducing the labor and troublesomeness of the occupant.

  In addition, according to the configuration of the third embodiment, individual conditioned air that alternately switches between hot air and cold air for the occupant is triggered by detecting the operation of the switch for the occupant to operate during sleep or fatigue. Blow out. Therefore, until the time when the occupant's body movement decreases due to sleep or fatigue and the blood flow tends to stagnate, the temperature of the conditioned air is adjusted according to the temperature setting received from the occupant, and the blood flow becomes a time when blood flow tends to stagnate. It becomes possible to make improvements. Accordingly, it is possible to suppress blood flow stagnation while ensuring passenger comfort. Moreover, since it is set as a trigger that a passenger | crew detects operation of the switch for operating at the time of sleep or fatigue | exhaustion, it becomes possible to start improvement of a blood flow at a passenger | crew's desired timing.

(Embodiment 4)
In the above-described embodiment, the configuration in which the switching control unit 206 switches the direction in which the conditioned air is blown by switching the blower outlet, such as the blower outlet TD to the blower outlet CD, is not necessarily limited thereto. For example, it is good also as a structure which turns back the direction of the conditioned air which blows off from one blower outlet with a louver.

(Embodiment 5)
In the above-described embodiment, when the trigger is detected by the trigger detection units 203, 203a, and 203b, the switching control unit 206 is configured to change the adjustment of the air outlet that blows the conditioned air before and after detecting the trigger. However, this is not necessarily the case. For example, the switching control unit 206 may have a configuration in which the adjustment of the air outlet that blows out the conditioned air is not changed before the trigger is detected. As an example, when individual air conditioning is started regardless of whether or not a trigger is detected, a configuration may be adopted in which conditioned air is blown from all of the air outlets ND, BD, TD, and CD. In this case, the seat air conditioner 2 may not include the switching damper 26, and the seat air conditioning ECUs 20, 20a, and 20b may not include the switching control unit 206.

(Embodiment 6)
In the above-described embodiment, the configuration in which the individual air conditioning is performed in the blood flow improvement mode when the trigger is detected by the trigger detection units 203, 203a, and 203b has been described, but the configuration is not necessarily limited thereto. For example, it may be configured to perform individual air conditioning in the blood flow improvement mode regardless of whether or not a trigger is detected. In this case, since a stagnation of blood flow is likely to occur in the legs, it is assumed that the conditioned air blown out by the seat air conditioning unit 204 is at least directed to the legs. In this case, the air conditioning for ensuring the comfort of the passengers may be configured to use comprehensive air conditioning that comprehensively air-conditions the passengers on a plurality of seats, instead of individual air conditioning.

  Note that the present disclosure is not limited to the above-described embodiments, and various modifications can be made within the scope shown in the claims, and can be obtained by appropriately combining technical means disclosed in different embodiments. Embodiments are also included in the technical scope of the present disclosure.

DESCRIPTION OF SYMBOLS 1 Seat air conditioning system, 2 Seat air conditioner, 3 Seat sensor, 4 Seat HMI, 20, 20a, 20b Seat air conditioning ECU, 21 Refrigeration cycle device, 22 Heating device, 24 2nd air blower, 25 Air mix damper, 26 Switching damper, 201 operation information acquisition unit, 202 seating detection unit, 203, 203a, 203b trigger detection unit, 204 seat air conditioning unit, 205 temperature control unit, 206 switching control unit, 207 biological information acquisition unit, 208 sleep detection unit, 209 operation detection unit

Claims (7)

It is provided for each sheet (Se) of the transportation vehicle,
A seat air-conditioning unit (204) that blows out individual conditioned air to the passenger seated on the seat;
A temperature control unit (205) for controlling the temperature of the conditioned air blown out by the seat air conditioning unit,
The said temperature control part is a sheet | seat air conditioner which controls the temperature of the said air-conditioning wind so that the air-conditioning wind blown off by the said sheet | seat air-conditioning part switches to a warm air and a cold air alternately. A trigger detection unit (203, 203a, 203b) for detecting a predetermined trigger for estimating sleep or fatigue of the occupant;
The temperature control unit is configured so that the conditioned air blown out by the seat air-conditioning unit becomes a temperature according to the temperature setting of the conditioned air received from the occupant until the trigger detection unit detects the trigger. While controlling the temperature of the wind, when the trigger detection unit detects the trigger, the temperature of the conditioned air is changed so that the conditioned air blown out by the seat air conditioning unit is switched alternately between hot air and cold air. The seat air conditioner according to claim 1 to be controlled.   The seat air-conditioning apparatus according to claim 2, wherein the seat air-conditioning unit blows out air-conditioned air to at least a leg of the occupant as the air-conditioned air blown out by the seat air-conditioning unit when the trigger detection unit detects the trigger. . A switching control unit (206) for switching a direction in which the conditioned air is blown out by the seat air-conditioning unit;
The switching control unit, when detecting the trigger by the trigger detection unit, the conditioned air whose temperature is controlled by the temperature control unit so as to alternately switch between hot air and cold air, on the thigh of the occupant The seat air conditioner according to claim 3, wherein the air conditioner is blown toward the calf of the occupant after being blown out. A seating detection unit (202) for detecting the seating of the occupant on the seat;
The trigger detection unit detects, as the trigger, that a predetermined time during which sleep or fatigue of the occupant is estimated has elapsed since the seating detection unit detected the seating of the occupant on the seat. The seat air conditioner according to any one of 4. The trigger detection unit detects a predetermined trigger for estimating sleep of the occupant,
A biological information acquisition unit (207) for acquiring biological information of the occupant seated on the seat;
A sleep detector (208) that detects sleep of the occupant based on the biological information acquired by the biological information acquisition unit;
The seat air conditioner according to any one of claims 2 to 4, wherein the trigger detection unit detects that the sleep detection unit detects sleep of the occupant as the trigger. An operation detection unit (209) for detecting an operation of a switch for the passenger to operate during sleep or fatigue;
The seat air conditioner according to any one of claims 2 to 4, wherein the trigger detection unit detects that the operation detection unit detects an operation of the switch as the trigger.

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