JP4788540B2 - Air conditioning system and air conditioning method - Google Patents

Description

  The present invention relates to an air-conditioning system and an air-conditioning method that are mounted on a vehicle in which a power storage device is arranged, and particularly relates to a technique for air-conditioning a passenger and a power storage device using a common air-conditioning device.

  A so-called electric vehicle such as an electric vehicle, a hybrid vehicle, or a fuel cell vehicle is equipped with a power storage device such as a secondary battery or a capacitor, and generates driving force from the electric power stored in the power storage device via the electric motor. Such an electric vehicle causes the electric motor to function as a generator (regenerative braking) during braking and collects the kinetic energy of the vehicle as electric power in the power storage device. The electric power collected by the power storage device is reused for generating driving force.

  In order for such an electric vehicle to fully exhibit its running ability, it is necessary to maintain the power storage device so that it can exhibit a predetermined performance. In particular, the power storage device is susceptible to temperature because it stores electric power using an electrochemical action. Specifically, in the power storage device, when the temperature decreases, the discharge power decreases due to the decrease in activity, and when the temperature increases, the charging / discharging current becomes unstable and the deterioration is accelerated.

  Therefore, a configuration for managing the temperature of the power storage device mounted on the electric vehicle has been proposed. For example, in Japanese Patent Application Laid-Open No. 11-040212 (Patent Document 1), a cooling medium is supplied to an indoor heat exchanger disposed in a duct, and air flowing in the duct is cooled and led out into the vehicle interior. In an electric vehicle equipped with a refrigeration cycle, a control for supplying and cooling the outside air to the battery by a blowing means arranged in correspondence with the battery and a control for supplying the cool air to the battery by the refrigeration cycle are selectively performed. A battery cooling method is disclosed.

  In electric vehicles, a power storage device is often arranged in the vicinity of the occupant position. In an electric vehicle in which such a power storage device is arranged close to the occupant position, a configuration has been proposed in which the temperature management of the power storage device is performed using an air conditioner (air conditioner) directed to the passenger compartment or the passenger. For example, in Japanese Patent Laid-Open No. 2006-141153 (Patent Document 2), a battery disposed in a vehicle compartment is housed inside, and an air inlet and an air outlet are formed substantially opposite to each other on a wall portion thereof. Disclosed is a battery cooling device comprising: a battery housing portion; and an air supply duct connected to the air introduction port and configured to supply air sent from the air conditioning device for vehicle interior to the inside of the battery housing portion. ing.

By the way, the structure which blows off conditioned air from the seat surface which contact | connects a passenger | crew is proposed as an air conditioner provided in a vehicle interior. For example, Japanese Patent Application Laid-Open No. 2004-215748 (Patent Document 3) discloses a seat cushion capable of blowing cool air from a surface that receives an occupant's buttocks and thighs, and cold air from a surface that receives an occupant's shoulder and waist. The vehicle air conditioner provided with the seat back which can blow off is disclosed.
Japanese Patent Laid-Open No. 11-040212 JP 2006-141153 A JP 2004-215748 A JP 2006-159959 A JP 2004-001674 A Japanese Patent Laid-Open No. 08-040088

  However, the battery cooling device disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 2006-141153 (Patent Document 2) is mainly intended to more effectively perform temperature management (cooling) of the power storage device (battery). There was also a lack of perspective to ensure comfort for passengers. That is, in a case where the air conditioning capability is limited, for example, coordination between ensuring comfort for passengers and temperature management of the power storage device has not been achieved, and emphasis has been placed only on temperature management of the power storage device. For this reason, there has been a problem that sufficient comfort for the passenger may not be ensured.

  The present invention has been made to solve such problems, and its purpose is to ensure comfort for passengers even when the air conditioning capability is limited, while To provide an air conditioning system and an air conditioning method capable of performing temperature management.

  According to an aspect of the present invention, an air conditioning system mounted on a vehicle in which a power storage device is arranged. The air-conditioning system according to the present invention includes an air-conditioning air generator configured to generate air-conditioned air for performing cooling or heating, and a first air for blowing air-conditioned air toward an occupant with a first adjustable air volume. A first air flow mechanism, a second air flow mechanism for supplying conditioned air to the power storage device with an adjustable second air volume, and a first air conditioner that determines a first air conditioning request according to the required air volume of the air conditioned air to the passenger Air-conditioning request determination means, second air-conditioning request determination means for determining a second air-conditioning request according to the required air volume of the conditioned air to the power storage device, and the first air blowing mechanism so as to satisfy the first air-conditioning request The second air flow is determined in response to the second air-conditioning request within a range in which the first air volume and the second air volume are maintained below a predetermined maximum air volume. Determine the second air volume supplied from the mechanism And a flow rate determining means.

  According to the present invention, after ensuring the supply amount of the conditioned air to the passenger (first air volume) according to the air conditioning request, the sum of the first air volume and the second air volume exceeds a predetermined maximum air volume or less. Since the air volume (second air volume) of the conditioned air for performing temperature management of the power storage device can be determined within the range, it is possible to avoid the supply of conditioned air to the power storage device beyond the air conditioning capability. Therefore, even if the air conditioning capability is limited, the temperature management of the power storage device can be performed while ensuring comfort for the passenger.

  Preferably, the air volume determining means determines the first air volume to a constant value according to the first air conditioning request, and sets the second air volume to the sum of the first air volume and the second air volume as a predetermined maximum air volume. Decide on the following constant values.

  Further preferably, the air volume determining means periodically changes the first air volume at a time ratio corresponding to the first air conditioning request, and corresponds to the periodic change of the first air volume, so that the second air volume is determined. The air volume is changed periodically.

  Preferably, each of the first and second air blowing mechanisms includes a fan, and the fan is configured such that its rotational speed is changed according to the first or second air volume.

Preferably, the power storage device is arranged close to the occupant position.
Preferably, the air conditioning system further includes a seat on which the occupant is seated, and the seat is configured to be able to blow conditioned air supplied from the first blower mechanism from a surface in contact with the occupant.

Preferably, the conditioned air generation unit includes a Peltier element.
Preferably, the air conditioning system further includes a generation stop unit that stops generation of the conditioned air in the conditioned air generation unit if neither the first or second air conditioning request exists.

  According to another aspect of the present invention, it is an air conditioning method in a vehicle in which a power storage device is arranged. The vehicle includes an air-conditioning air generator configured to generate air-conditioned air for performing cooling or heating, a first air blowing mechanism for blowing air-conditioned air toward an occupant with an adjustable first air volume, A second air blowing mechanism for supplying conditioned air to the power storage device with an adjustable second air volume. The air conditioning method according to the present invention includes a first air conditioning request determination step for determining a first air conditioning request according to the required air volume of conditioned air for the occupant, and a second according to the required air volume of the conditioned air for the power storage device. A second air-conditioning request determining step for determining the air-conditioning request, and determining the first air volume blown from the first air blowing mechanism so as to satisfy the first air-conditioning request, and the first air volume and the second An air volume determining step for determining a second air volume supplied from the second blower mechanism in response to the second air conditioning request within a range in which the total of the air volume is maintained below a predetermined maximum air volume.

  According to the present invention, it is possible to realize an air conditioning system capable of managing the temperature of a power storage device while ensuring comfort for passengers even when the air conditioning capability is limited.

  Embodiments of the present invention will be described in detail with reference to the drawings. Note that the same or corresponding parts in the drawings are denoted by the same reference numerals and description thereof will not be repeated.

  FIG. 1 is a schematic configuration diagram of a vehicle 100 equipped with an air conditioning system according to an embodiment of the present invention.

  Referring to FIG. 1, a vehicle 100 is a hybrid vehicle that travels by using a driving force by electric power stored in a power storage device and a driving force by an engine as an example. Vehicle 100 includes engine 2, electric motor 4, power control unit (PCU) 6, drive shaft 8, speed reducer 10, and power storage device 16. The vehicle 100 travels using the driving force from at least one of the engine 2 and the electric motor 4.

  The engine 2 is an internal combustion engine that operates by burning fuels such as gasoline, light oil, and LPG, for example, and generates driving force using thermal energy accompanying combustion and transmits the driving force to the driving shaft 8.

  The electric motor 4 is mechanically coupled to the engine 2 via the drive shaft 8, generates a driving force by the electric power received from the power storage device 16 via the power control unit 6, and transmits the driving force to the drive shaft 8.

  The power control unit 6 receives DC power from the power storage device 16, converts it into three-phase AC power according to a torque command and a rotational speed command from an external control device (not shown), and outputs the three-phase AC power to the motor 4.

  The speed reducer 10 drives the drive wheels 14 by changing the rotational speed of the drive shaft 8 rotated by the driving force from the engine 2 and the electric motor 4 at a predetermined reduction ratio. In the present embodiment, the vehicle 100 that drives only the driving wheel 14 that is the front wheel is illustrated, but an electric motor or the like may be further mounted so that the driven wheel 18 is also driven. Alternatively, a power generation mechanism that is mechanically coupled to the engine 2 may be further mounted.

  The power storage device 16 is arranged close to the occupant position of the vehicle 100. The power storage device 16 is configured by a secondary battery such as a nickel metal hydride battery or a lithium ion battery, or an electric double layer capacitor, and stores power by an electrochemical action, while power is stored according to demand. Supply to the control unit 6. That is, the power storage device 16 is configured to be able to charge and discharge DC power with the power control unit 6.

  Further, the power storage device 16 is provided with a temperature detection unit 17 for detecting the temperature of an element (such as a battery cell) related to power storage (hereinafter referred to as “power storage temperature”). The temperature detection unit 17 outputs the detected storage temperature to a control device described later.

  Further, front seats 20.1, 20.2 and rear seats 22 are arranged in the passenger compartment of vehicle 100. The air conditioning unit 24 is disposed at the bottom of the rear seat 22 and the power storage device 16 is disposed at the vehicle rear side of the rear seat 22. The air conditioning unit 24 and the power storage device 16 communicate with each other through a communication duct 26.

  The air conditioning unit 24 is used for ensuring comfort for passengers and for temperature management of the power storage device 16. Specifically, the air conditioning unit 24 generates conditioned air for cooling or heating and supplies the conditioned air to the rear seat 22. The conditioned air supplied to the rear seat 22 is blown out from the surface of the rear seat 22 that contacts the occupant, thereby air-conditioning the occupant. A sheet configured to be able to blow out conditioned air is also referred to as an “air-conditioned sheet”. On the other hand, the power storage fan 34 provided on the outlet side of the cooling passage of the power storage device 16 attracts conditioned air from the air conditioning unit 24 to the power storage device 16, and performs temperature management (cooling or temperature increase) of the power storage device 16.

  The air conditioning unit 24 according to the embodiment of the present invention generates conditioned air intended for either cooling or heating in response to an air conditioning request from the occupant. Since this is basically the same as the direction in which temperature management is performed on 16 (cooling or temperature rise), it is possible to achieve both passenger comfort and temperature management of the power storage device 16 using common conditioned air. Therefore, in the following description, the operation of the air conditioning system according to the present invention will be described mainly focusing on the air volume of the conditioned air without specifying the type of conditioned air (for cooling or for heating).

(Air conditioning sheet)
FIG. 2 is a more detailed schematic configuration diagram of the rear seat 22.

  Referring to FIG. 2, the rear seat 22 includes a seat cushion 70 for supporting the occupant's buttocks and the like, and a seat back 72 for supporting the back of the occupant. The air conditioning unit 24 is disposed on the bottom surface of the seat cushion 70.

  The seat cushion 70 has a breathable skin member 80a disposed on the surface thereof, and a mesh-like structural member 78a is disposed on the seat inner side of the skin member 80a. And the structural member 78a is connected with the air path 74a formed in the inside of the seat cushion 70 through the several opening part 76a arrange | positioned at predetermined intervals. That is, the conditioned air flowing through the air path 74a passes through the opening 76a and the structural member 78a and is blown out from the surface of the skin member 80a toward the occupant.

  Similarly, the seatback 72 is provided with a skin member 80b having air permeability on the surface thereof, and a mesh-like structural member 78b is laminated and disposed on the seat inner side of the skin member 80b. And the structural member 78b is connected with the air path 74b formed in the inside of the seat back 72 through the several opening part 76b arrange | positioned at predetermined intervals. That is, the conditioned air flowing through the air path 74b passes through the opening 76b and the structural member 78b and is blown out from the surface of the skin member 80b toward the occupant. Further, the air path 74 b communicates with the air path 74 a of the seat cushion 70 through the flexible duct 82.

(Air conditioning unit)
Referring to FIG. 2, the air conditioning unit 24 includes an conditioned air generation unit 28 and a seat fan 30 arranged in a common conduction path.

  The conditioned air generation unit 28 includes a Peltier element as an example, and selectively generates conditioned air for performing cooling or heating according to the direction of current supplied from an external power source (not shown).

  The seat fan 30 is inserted between the conditioned air generation unit 28 and the air paths 74 a and 74 b, and blows conditioned air generated by the conditioned air generation unit 28 to the rear seat 22. Further, the seat fan 30 is configured to be able to adjust the blowing air volume by changing the rotation speed in accordance with a supply voltage from an external power source (not shown). That is, the seat fan 30 corresponds to a first air volume adjusting mechanism for blowing out the conditioned air toward the occupant with a predetermined adjustable air volume.

  Further, in the air conditioning unit 24, the communication duct 26 is connected to the flow path between the conditioned air generation unit 28 and the seat fan 30, and the conditioned air generated by the conditioned air generation unit 28 is stored in the power storage device 16 (FIG. 1). It is configured to be able to supply to.

FIG. 3 is a diagram for explaining the flow of conditioned air generated by the air conditioning unit 24.
Referring to FIG. 3, power storage device 16 is packaged such that the conditioned air supplied through communication duct 26 passes through the surface thereof. That is, the power storage device 16 is configured to exchange heat with the supplied conditioned air.

  The power storage fan 34 is disposed on the exit side of the air passage including the power storage device 16 and functions to attract conditioned air generated by the air conditioning unit 24. Further, the power storage fan 34 is configured to be able to adjust the amount of induced air by changing the rotational speed in accordance with a supply voltage from an external power source (not shown). That is, the power storage fan 34 corresponds to a second air volume adjusting mechanism for supplying conditioned air to the power storage device with a predetermined adjustable air volume.

  The conditioned air 62 is generated when the vehicle interior air 60 passes through the conditioned air generation unit 28. That is, when the vehicle interior air 60 passes through the conditioned air generation unit 28, heat exchange occurs between the vehicle interior air 60 and the conditioned air generation unit 28, and the vehicle interior air 60 is cooled or heated. The generated conditioned air 62 is divided into conditioned air (air conditioned seat) 64 and conditioned air (power storage device) 66 according to the magnitude relationship between the suction pressure by the seat fan 30 and the suction pressure of the power storage fan 34. These are respectively supplied to the rear seat 22 and the power storage device 16.

  In addition, you may comprise this invention using air conditioners other than an air conditioning sheet | seat. That is, as long as the generated conditioned air can be supplied to the occupant and the power storage device 16, the air conditioning unit 24 may be disposed at any position.

(Control structure)
FIG. 4 is a functional block diagram according to the air conditioning system according to the embodiment of the present invention.

  Referring to FIG. 4, the air conditioning system according to the embodiment of the present invention includes a control device ECU, an air conditioning switch 40, a temperature detection unit 17, a current supply unit 42, and motor drive units 44 and 46.

  The air conditioning switch 40 receives a seat air conditioning request from an occupant and outputs the seat air conditioning request to the control device ECU.

FIG. 5 is an example of an external view of the air conditioning switch 40.
Referring to FIG. 5, air conditioning switch 40 accepts a seat air conditioning request according to the rotation direction and rotation angle of dial 40 a configured to be rotatable. Specifically, the air conditioning switch 40 determines that no sheet air conditioning request has been given (OFF level) if the dial 40a indicates the upward direction on the page, and the dial 40a indicates the left side of the page. If the dial 40a indicates the right side of the page, it is determined that the heating request is given. Further, the air conditioning switch 40 has two stages, a weak level (LO level) and a strong level (HI level), depending on the magnitude of the rotation angle of the dial 40a with respect to the OFF state position for both the cooling request and the heating request. Determine the strength level.

  Referring to FIG. 4 again, air conditioning switch 40 outputs the type of seat air conditioning request (cooling or heating) given by the occupant's operation and the corresponding strength (LO level or HI level) to control unit ECU. .

  As described above, the temperature detection unit 17 detects the power storage temperature of the power storage device 16 and outputs the detection result to the control device ECU.

  The current supply unit 42 supplies a current having a predetermined amperage value and a current direction to a Peltier element included in the conditioned air generation unit 28 in accordance with a control command from the control device ECU. Then, the Peltier element generates an endothermic reaction (at the time of cooling) or an exothermic reaction (at the time of heating) depending on the direction of the supplied current, and the amount of heat related to the reaction changes according to the ampere value of the supplied current.

  The motor drive unit 44 supplies drive power to the seat fan motor 30a for rotating the seat fan 30 in accordance with a control command from the control device ECU. As an example, the motor driving unit 44 changes the voltage of the driving power so that the seat fan 30 generates a predetermined rotation speed, that is, a predetermined air volume.

  Similarly, motor drive unit 46 supplies drive power to power storage fan motor 34a for rotating power storage fan 34 in response to a control command from control unit ECU. As an example, the motor driving unit 46 changes the voltage of the driving power so that the power storage fan 34 generates a predetermined rotation speed, that is, a predetermined air volume.

  The control device ECU takes into consideration the seat air conditioning request given via the air conditioning switch 40 and the air conditioning request to the power storage device 16 according to the power storage temperature detected by the temperature detection unit 17, respectively. At 34, the air volume to be generated is determined. Then, the control device ECU gives a control command (voltage command) to each of the motor drive units 44 and 46 so that the determined air volume is generated.

  More specifically, the control device ECU determines the first air conditioning request according to the required air volume of the conditioned air for the occupant based on the seat air conditioning request from the air conditioning switch 40 and is detected by the temperature detection unit 17. A second air conditioning request according to the required air volume of the conditioned air for the power storage device 16 is determined according to the power storage temperature. Then, the control device ECU determines the air volume to be generated by the seat fan 30 so as to satisfy the first air conditioning request. Further, the control unit ECU determines the air volume that should be generated in the power storage fan 34 in response to the second air conditioning request within a range in which the sum of the air volume of the seat fan 30 and the air volume of the power storage fan 34 is maintained below a predetermined maximum air volume. decide.

  Note that the control device ECU stops the generation of conditioned air in the conditioned air generation unit 28 if neither the first or second air conditioning request exists.

(Determination method of air volume)
In the following, an example of determining the air volume for each fan when each of the seat fan 30 and the power storage fan 34 can adjust the air volume in two stages of the LO level and the HI level in addition to the OFF level (stop state). To do.

  FIG. 6 is a map showing the relationship between the first air conditioning request and the second air conditioning request and the air volume of each fan.

  Referring to FIG. 6, as described above, air conditioning switch 40 can accept a seat air conditioning request in two stages of a weak level (LO level) and a strong level (HI level) for both the cooling request and the heating request. It is. Therefore, the control device ECU determines the first air conditioning request in accordance with the seat air conditioning request from the air conditioning switch 40. That is, the control device ECU determines the strength level (OFF level, LO level, HI level) of the air conditioning switch 40 operated by the passenger as the first air conditioning request. Then, in order to satisfy the determined first air conditioning request, the control device ECU determines the rotational speed of the seat fan 30 in accordance with the first air conditioning request. That is, if the first air conditioning request is the OFF level, LO level, and HI level, respectively, the control device ECU sets the rotational speed of the seat fan 30 to the OFF level, LO level, and HI level, respectively.

  Then, the control unit ECU determines the rotation speed of the power storage fan 34 in accordance with the second air conditioning request within a range where the sum of the air volume of the seat fan 30 and the air volume of the power storage fan 34 is maintained below the maximum air volume. . In the embodiment of the present invention, as the second air conditioning request, three levels (“0”, “1”, “2”) are determined according to the power storage temperature.

FIG. 7 is a diagram for explaining a second air conditioning request determination method.
Referring to FIG. 7, the power storage temperature of power storage device 16 is defined on the horizontal axis, and the power storage temperature level that is the second air conditioning request is defined on the vertical axis. Here, the power storage temperature level indicates the necessity of temperature management for the power storage device 16, that is, the required air volume of the conditioned air for the power storage device 16.

  The power storage temperature level is defined so as to have a hysteresis characteristic with respect to the power storage temperature. Specifically, the transition temperature T1on related to the transition from “0” to “1” of the power storage temperature level is defined so as to coincide with the upper limit value of the optimum temperature range of the power storage device 16. Then, a temperature that is lower than the transition temperature T1on by a predetermined value is defined as a transition temperature T1off related to the transition from “1” to “0” of the storage temperature level. That is, when the power storage temperature is outside the optimum temperature range of the power storage device 16, the power storage temperature level changes from “0” to “1”, while the power storage temperature is a predetermined margin (T1on with respect to the upper limit value of the optimum temperature range). -T1off) occurs, the power storage temperature level returns from "1" to "0".

  Further, a temperature higher than the transition temperature T1on by a predetermined value is defined as the transition temperature T2on related to the transition from the power storage temperature level “1” to “2”, and an intermediate temperature between the transition temperature T1on and the transition temperature T2on is defined. It is defined as the transition temperature T2off related to the transition of the level from “2” to “1”.

  Thus, control device ECU determines the power storage temperature level which is the 2nd air conditioning demand according to the power storage temperature. 7 illustrates the power storage temperature level when the power storage device 16 is cooled, but the power storage temperature level is determined so as to have similar hysteresis characteristics when the power storage device 16 is heated. Since the hysteresis characteristic is the same as that of FIG. 7 that is symmetrically inverted with respect to the vertical axis, detailed description will not be repeated.

  Referring to FIG. 6 again, in this setting example, the maximum air volume by the seat fan 30 and the power storage fan 34, the total air volume when one fan is at the LO level and the other fan is at the HI level, and both fans are Set to the total air volume at the HI level. That is, the maximum air volume is set so that both fans are not allowed to be at the HI level while only one of the fans is allowed to be at the HI level.

  Therefore, the control device ECU basically sets the rotational speed of the power storage fan 34 in accordance with the power storage temperature level that is the second air conditioning request, but the air volume of the seat fan 30 and the air volume of the power storage fan 34 When the total air volume exceeds the maximum air volume, the rotational speed of the power storage fan 34 is limited.

  That is, when the first air conditioning request is at the HI level, the rotational speed of the seat fan 30 is also determined to be at the HI level, and thus the rotational speed of the power storage fan 34 is limited to the LO level or less. Therefore, when the first air conditioning request is the HI level and the second air conditioning request is “2”, the rotation speed of the power storage fan 34 is determined not to the HI level but to the LO level.

  On the other hand, when the first air conditioning request is at the OFF level, the seat fan 30 is stopped, so that the rotation speed of the power storage fan 34 can be determined at any level. Therefore, when the first air conditioning request is OFF level and the second air conditioning request is “1”, the rotational speed of the power storage fan 34 is set to the HI level in order to more quickly manage the temperature of the power storage device 16. It is determined.

  Further, when neither the first air conditioning request nor the second air conditioning request exists, that is, when the first air conditioning request is OFF level and the second air conditioning request is “0”, the conditioned air generation unit 28 supplies the conditioned air. Generation is stopped.

  As described above, the air volumes of the seat fan 30 and the power storage fan 34 are determined according to the first air conditioning request and the second air conditioning request.

(Processing flow)
FIG. 8 is a flowchart showing a control structure according to the embodiment of the present invention.

  Referring to FIG. 8, control device ECU determines whether or not the ready state is set (step S100). The ready state means a state in which preparation for traveling in vehicle 100 is completed, and is given to the control device ECU from an external device (not shown) according to the operation state of each device including power storage device 16. In the ready state (YES in step S100), the control device ECU acquires the required air volume of the seat conditioned air from the air conditioning switch 40 (step S102). Then, the control device ECU determines the first air conditioning request according to the required air volume (step S104).

  Further, the control device ECU acquires the power storage temperature of the power storage device 16 from the temperature detection unit 17 (step S106). Then, control device ECU determines the power storage temperature level of power storage device 16 based on the acquired power storage temperature (step S108), and determines the second air conditioning request (step S110).

  Further, the control device ECU determines the rotational speed of the seat fan 30 so as to satisfy the first air conditioning request (step S112). Then, the control device ECU determines the rotation speed of the power storage fan 34 in response to the second air conditioning request within a range in which the sum of the air volume of the seat fan 30 and the air volume of the power storage fan 34 is maintained below a predetermined maximum air volume. (Step S114).

  Then, control device ECU determines whether or not the first air conditioning request is OFF level and the second air conditioning request is “0” (step S116). When the first air conditioning request is OFF level and the second air conditioning request is “0” (YES in step S116), control device ECU interrupts the current supply to conditioned air generation unit 28, Generation of conditioned air is stopped (step S118).

  After the generation of conditioned air is stopped (after step S118), or when the first air conditioning request is not at the OFF level, or the second air conditioning request is not “0” (NO in step S116), control is performed. The device ECU executes the processing from step S100 onward again.

  On the other hand, if not in the Ready state (NO in step S100), control device ECU ends the process.

  In the above-described embodiment of the present invention, both the seat fan 30 and the power storage fan 34 have been illustrated with respect to the configuration in which the two-stage air volume adjustment is possible in addition to the stopped state. However, the present invention is not limited to this configuration. Absent. For example, a configuration capable of adjusting the air volume in three or more stages or a configuration capable of continuously adjusting the air volume may be employed.

  In the above-described embodiment of the present invention, the first and second air conditioning requirements are exemplified as the configuration that is determined as any one of the three levels including zero. However, the present invention is not limited to this configuration. Absent. For example, the first air conditioning request is determined according to the deviation between the passenger compartment temperature requested by the occupant and the current passenger compartment temperature, and the second air conditioning request is determined according to the deviation between the optimum electricity storage temperature and the current electricity storage temperature. May be determined.

  According to the embodiment of the present invention, the air volume of the seat fan 30 and the power storage fan are determined after the air volume of the seat fan 30 is determined so as to satisfy the first air conditioning request according to the required air volume of the conditioned air for the passenger. The air volume of the power storage fan 34 is determined in accordance with the second air conditioning request within a range in which the total of the air volume 34 is maintained below the predetermined maximum air volume. Thereby, since the conditioned air to be blown out toward the passenger can be secured in advance, it is possible to avoid the supply of the conditioned air to the power storage device 16 beyond the air conditioning capability. Therefore, even when the air conditioning capability is limited, the temperature management of the power storage device can be performed while ensuring comfort for passengers.

  Therefore, even when the air conditioning capability is limited, an air conditioning system capable of managing the temperature of the power storage device while ensuring comfort for passengers can be realized.

  Further, according to the embodiment of the present invention, the air volume of each fan is determined so that the sum of the air volume of the seat fan 30 and the air volume of the power storage fan 34 is equal to or less than the predetermined maximum air volume. Noise in the passenger compartment generated according to (rotation speed) can be suppressed to a predetermined level or less. Thereby, in addition to providing comfort by air conditioning for the passenger, it is possible to realize a vehicle interior environment with less noise.

[Modification]
In the above-described embodiment of the present invention, the configuration in which the air flow rate of the seat fan 30 and the power storage fan 34 is determined to be a constant value according to the first and second air conditioning requirements is exemplified. The air volume may be changed periodically.

  Since the configuration of the air conditioning system according to the embodiment of the present invention is the same as the configuration of the above-described embodiment of the present invention, detailed description will not be repeated.

  FIG. 9 is a diagram for describing operations of seat fan 30 and power storage fan 34 according to the modification of the embodiment of the present invention.

FIG. 9A shows a case where the first air conditioning request is determined to have a certain value.
FIG. 9B shows a case where the first air conditioning request level is higher than in the case of FIG.

  FIG. 9C shows a case where both the first and second air conditioning request levels are lower than in the case of FIG.

  Referring to FIGS. 9A to 9C, control unit ECU periodically changes the rotational speed of seat fan 30 at a time ratio (operation time T1 / cycle T) corresponding to the first air conditioning request. Let That is, the control device ECU changes the rotation speed of the seat fan 30 so that the amount of the conditioned air blown toward the occupant periodically changes at a time ratio corresponding to the first air conditioning request.

  At the same time, the control device ECU periodically changes the rotational speed of the power storage fan 34 in response to the periodic change in the rotational speed of the seat fan 30. That is, the control device ECU periodically changes the rotational speed of the power storage fan 34 so that the conditioned air supplied to the power storage device 16 increases during the period in which the conditioned air blown toward the occupant decreases.

  When the first air conditioning request is determined to be a certain value, first, the operating time ratio (T1 / T) of the seat fan 30 is determined as shown in FIG. Then, within the remaining time obtained by excluding the operation time T1 of the seat fan 30 from the cycle T, the operation time T2 of the power storage fan 34 corresponding to the second air conditioning request is determined. When the second air conditioning requirement is relatively high, the sum of the operation time T1 of the seat fan 30 and the operation time T2 of the power storage fan 34 coincides with the period T.

  On the other hand, when the level of the first air conditioning request becomes higher, the operating time ratio (T1 / T) of the seat fan 30 becomes higher as shown in FIG. The time that can be reduced. Therefore, the operation time ratio (T2 / T) of the power storage fan 34 is relatively low.

  Further, when both the first and second air conditioning request levels are lowered, the operation time ratio (T1 / T) of the seat fan 30 is further lowered as shown in FIG. The time that can be allocated increases. Here, if the level of the second air conditioning requirement is low, it is not necessary to increase the operating time ratio (T2 / T) of the power storage fan 34 more than necessary, so that both the seat fan 30 and the power storage fan 34 are stopped ( OFF period) occurs.

  Note that the generation of conditioned air in the conditioned air generation unit 28 may be stopped during a period in which both the seat fan 30 and the power storage fan 34 are in the stopped state (OFF level).

  In the example shown in FIG. 9 described above, the configuration in which the seat fan 30 and the power storage fan 34 change the rotation speed (air volume) in two stages of the LO level and the HI level has been described, but the two stages of the OFF level and the HI level are described. A configuration in which the rotation speed (air volume) is changed may be adopted.

  In this way, in order to change the instantaneous air volume of each fan, instead of the configuration in which the rotation speed of each fan is changed, the time ratio at which each fan is operated to change the air volume in the time average of each fan. It is possible to adopt a configuration that changes

  Since the air volume determination method and the like of seat fan 30 and power storage fan 34 are the same as in the above-described embodiment of the present invention, detailed description will not be repeated.

  According to the modification of the embodiment of the present invention, in addition to the effects in the above-described embodiment of the present invention, the total air volume of the seat fan 30 and the power storage fan 34 is constant in time. By making the total air volume coincide with the predetermined maximum air volume, the air conditioning for the passenger and the temperature management of the power storage device can be performed most efficiently.

  In the above-described embodiment and modification of the present invention, the configuration in which the conditioned air is supplied from one air conditioning unit to the power storage device is illustrated, but the configuration is not limited thereto. That is, conditioned air may be supplied to the power storage device from a plurality of air conditioning units.

  In the above-described embodiments and modifications of the present invention, the air conditioning unit that generates the conditioned air by the Peltier element is illustrated as an example, but other heat exchange elements may be used. That is, it can also be realized by a refrigeration cycle using an evaporator or a configuration using engine exhaust heat.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1 is a schematic configuration diagram of a vehicle equipped with an air conditioning system according to an embodiment of the present invention. It is a more detailed schematic block diagram of a rear seat. It is a figure for demonstrating the flow of the conditioned air produced | generated by an air conditioning unit. It is a functional block diagram which concerns on the air conditioning system according to embodiment of this invention. It is an example of the external view of an air conditioning switch. It is a map which shows the relationship between the 1st air-conditioning request | requirement and the 2nd air-conditioning request | requirement, and the air volume of each fan. It is a figure for demonstrating the determination method of a 2nd air conditioning request | requirement. It is a flowchart which shows the control structure according to embodiment of this invention. It is a figure for demonstrating operation | movement of the seat fan and electrical storage fan according to the modification of embodiment of this invention.

Explanation of symbols

  2 engine, 4 electric motor, 6 power control unit (PCU), 8 drive shaft, 10 speed reducer, 14 drive wheel, 16 power storage device, 17 temperature detector, 18 driven wheel, 20.1, 20.2 front seat, 22 rear seat, 24 air conditioning unit, 26 communication duct, 28 conditioned air generation unit, 30 seat fan, 30a seat fan motor, 34 power storage fan, 34a power storage fan motor, 40 air conditioning switch, 40a dial, 42 current supply unit, 44 , 46 Motor drive part, 60 Car interior air, 62 Air-conditioned air, 70 Seat cushion, 72 Seat back, 74a, 74b Air path, 76a, 76b Opening part, 78a, 78b Structural member, 80a, 80b Skin member, 82 Possible Flexible duct, 100 vehicle, ECU controller, T1off, T1o , T2off, T2on transition temperature.

Claims (9)

An air conditioning system mounted on a vehicle in which a power storage device is arranged,
An conditioned air generator configured to generate conditioned air for cooling or heating; and
A first air blowing mechanism that is provided in a first duct that communicates with the conditioned air generation unit and blows out the conditioned air toward an occupant with an adjustable first air volume;
A second blower mechanism provided in a second duct communicating with the conditioned air generation unit and the first duct, for supplying the conditioned air to the power storage device with an adjustable second air volume;
First air conditioning request determination means for determining a first air conditioning request according to a required air volume of the conditioned air for the occupant;
Second air-conditioning request determining means for determining a second air-conditioning request according to a required air volume of the conditioned air to the power storage device;
The first air volume blown from the first air blowing mechanism is preferentially determined so as to satisfy the first air conditioning request, and the sum of the first air volume and the second air volume is predetermined. An air volume determining means for determining the second air volume supplied from the second blower mechanism in response to the second air conditioning request within a range of maintaining the maximum air volume below the maximum air volume.   The air volume determining means determines the first air volume to a constant value according to the first air conditioning request, and sets the second air volume to a total of the first air volume and the second air volume. The air conditioning system according to claim 1, wherein the air conditioning system is determined to be a constant value that is equal to or less than the maximum air volume.   The air volume determining means periodically changes the first air volume at a time ratio according to the first air conditioning request, and also corresponds to the periodic change of the first air volume, The air-conditioning system according to claim 1, wherein the air volume is periodically changed. Each of the first and second air blowing mechanisms includes a fan,
The air conditioning system according to any one of claims 1 to 3, wherein the fan is configured so that a rotational speed thereof is changed according to the first or second air volume.   The air conditioning system according to any one of claims 1 to 4, wherein the power storage device is disposed in proximity to a passenger position. The air conditioning system further includes a seat for the occupant to sit on,
The said sheet | seat is an air conditioning system of any one of Claims 1-5 comprised so that the said conditioned air supplied from a said 1st ventilation mechanism can be blown out from the surface which contact | connects the said passenger | crew.   The air-conditioning system according to claim 1, wherein the conditioned air generation unit includes a Peltier element.   The said air conditioning system is further provided with the production | generation stop means to stop the production | generation of the said conditioned air in the said conditioned air production | generation part, if neither the said 1st and 2nd air conditioning request | requirement exists. The air conditioning system according to claim 1. An air conditioning method for a vehicle in which a power storage device is arranged,
The vehicle is
An conditioned air generator configured to generate conditioned air for cooling or heating; and
A first air blowing mechanism that is provided in a first duct that communicates with the conditioned air generation unit and blows out the conditioned air toward an occupant with an adjustable first air volume;
A second blower mechanism provided in a second duct communicating with the conditioned air generation unit and the first duct and configured to supply the conditioned air to the power storage device with an adjustable second air volume; Prepared,
The air conditioning method is:
A first air conditioning request determination step for preferentially determining a first air conditioning request according to a required air volume of the conditioned air for the occupant;
A second air conditioning request determination step for determining a second air conditioning request according to a required air volume of the conditioned air to the power storage device;
The first air volume blown from the first air blowing mechanism is determined so as to satisfy the first air conditioning request, and the sum of the first air volume and the second air volume is a predetermined maximum air volume. An air conditioning method including an air volume determination step of determining the second air volume supplied from the second air blowing mechanism in response to the second air conditioning request within a range that maintains the following.

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