JP2009006816A - Ventilation control method and ventilating device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To control actuation and stoppage of a ventilation motor without using an ambient temperature sensor. <P>SOLUTION: In a ventilating device 10 for a vehicle, when an output of a solar battery 12 is switched to be in a short-circuit condition by a first relay 22 and a second relay 24, the short-circuit current is detected by a short-circuit current detecting circuit 18. On the other hand, when the output of the solar battery 12 is switched to be in an open-circuit condition by the first relay 22 and the second relay 24, the open-circuit voltage is detected by an open-circuit voltage detecting circuit 20. After that, a microcomputer 28 estimates an ambient temperature outside the vehicle in accordance with the short-circuit current detected by the short-circuit current detecting circuit 18 and the open-circuit voltage detected by the open-circuit voltage detecting circuit 20, and then controls an operation of the ventilation motor 16 based on the estimated ambient temperature. According to this construction, it is possible to control the actuation and stoppage of the ventilation motor 16 without using the ambient temperature sensor. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle ventilation control method and a vehicle ventilation device, and more particularly, to a vehicle ventilation control method and a vehicle ventilation device that use a solar cell as a power source.

Conventionally, this type of vehicle ventilation control method and vehicle ventilation device include the following (for example, see Patent Document 1). For example, Patent Literature 1 discloses an example of an automobile ventilation device. In the example described in Patent Document 1, an outside air temperature sensor is provided, and a ventilation fan is driven by a solar cell in accordance with an output signal from the outside air temperature sensor.
JP-A-1-190525 JP 2004-114900 A

  However, in the example described in Patent Document 1, in order to ventilate the vehicle interior, it is necessary to activate an outside air temperature sensor and a controller (for example, an air conditioner ECU) associated therewith, so that power consumption during ventilation increases. To do. Further, since a harness for connecting the outside air temperature sensor and the control unit is required, the cost increases. Therefore, in this type of vehicle ventilation control method and vehicle ventilation system, it is an object to be able to control the operation of the ventilation means without using an outside air temperature sensor.

  The present invention has been made in view of the above problems, and an object thereof is to provide a vehicle ventilation control method and a vehicle ventilation device that can control the operation of ventilation means without using an outside air temperature sensor. There is to do.

  In order to solve the above-mentioned problem, the vehicle ventilation control method according to claim 1, wherein a short-circuit current detection step of detecting a short-circuit current of the solar cell by setting an output of the solar cell equipped in the vehicle to a short-circuit state, According to the open circuit voltage detection step of detecting the open voltage of the solar cell with the output of the solar cell in an open state, the short circuit current detected in the short circuit current detection step and the open circuit voltage detected in the open voltage detection step And a ventilation control step for controlling the operation of a ventilation means for ventilating the passenger compartment of the vehicle.

  In the vehicle ventilation control method according to claim 1, when the short circuit current is detected when the output of the solar cell is in a short circuit state in the short circuit current detection step, and the output of the solar cell is in the open state in the open circuit voltage detection step The open circuit voltage is detected. And the operation | movement of a ventilation means is controlled according to the short circuit current detected at the short circuit current detection step in the ventilation control step, and the open circuit voltage detected at the open circuit voltage detection step.

  Thus, according to the vehicle ventilation control method of the first aspect, the operation of the ventilation means can be controlled without using the outside air temperature sensor.

  The vehicle ventilation control method according to claim 2 is the vehicle ventilation control method according to claim 1, wherein the short-circuit current detected in the short-circuit current detection step and the open-circuit voltage detected in the open-circuit voltage detection step are used. An outside air temperature estimating step for estimating an outside air temperature of the vehicle based on the air temperature, and controlling the operation of the ventilation means in the ventilation control step according to the outside air temperature estimated in the outside air temperature estimating step. .

  In the vehicle ventilation control method according to the second aspect, the outside air temperature of the vehicle is estimated based on the short circuit current detected in the short circuit current detecting step and the open circuit voltage detected in the open circuit voltage detecting step in the outside air temperature estimating step. In the ventilation control step, the operation of the ventilation means is controlled according to the outside air temperature estimated in the outside air temperature estimating step.

  Thus, according to the vehicle ventilation control method of the second aspect, the operation of the ventilation means can be controlled in accordance with the estimated outside air temperature.

  The vehicle ventilation control method according to claim 3 is the vehicle ventilation control method according to claim 2, wherein the solar radiation intensity applied to the solar cell from the short-circuit current detected in the short-circuit current detection step. A solar radiation intensity estimating step, a surface temperature estimating step for estimating a surface temperature of the solar cell from an open circuit voltage detected in the open circuit voltage detecting step, and a solar radiation intensity estimated in the solar radiation intensity estimating step. A temperature difference estimating step for estimating a temperature difference between the surface temperature of the battery and the outside air temperature of the vehicle, wherein in the outside air temperature estimating step, the temperature difference estimated in the temperature difference estimating step and the surface temperature estimating step The outside air temperature of the vehicle is estimated from the surface temperature estimated in (1).

  In the vehicle ventilation control method according to claim 3, the solar radiation intensity irradiated to the solar cell is estimated from the short-circuit current detected in the short-circuit current detection step in the solar radiation intensity estimation step, and is opened in the surface temperature estimation step. The surface temperature of the solar cell is estimated from the open circuit voltage detected in the voltage detection step. In addition, the temperature difference between the surface temperature of the solar cell and the outside air temperature of the vehicle is estimated from the solar radiation intensity estimated in the solar radiation intensity estimation step in the temperature difference estimation step. Then, the outside air temperature of the vehicle is estimated from the temperature difference estimated in the temperature difference estimating step and the surface temperature estimated in the surface temperature estimating step in the outside air temperature estimating step.

  Thus, according to the vehicle ventilation control method of the third aspect, the outside air temperature of the vehicle is estimated based on the short-circuit current detected in the short-circuit current detection step and the open-circuit voltage detected in the open-circuit voltage detection step. be able to.

  The vehicle ventilation control method according to claim 4 is the vehicle ventilation control method according to claim 3, wherein the solar radiation intensity lower limit value and the solar radiation intensity are continuously exceeded based on the outside air temperature estimated in the outside air temperature estimating step. An operating condition setting step for setting a time lower limit value, and in the ventilation control step, the duration of the state in which the solar radiation intensity applied to the vehicle exceeds the solar radiation intensity lower limit value continues above the solar radiation intensity The ventilating means is activated when it is determined that the time lower limit value is exceeded.

  In the vehicle ventilation control method according to the fourth aspect, the solar radiation intensity lower limit value and the solar radiation intensity increase duration lower limit value are set based on the external air temperature estimated in the external air temperature estimation step in the operating condition setting step. In the ventilation control step, when it is determined that the duration of the solar radiation applied to the vehicle exceeds the solar radiation intensity lower limit value, the ventilation means is actuated.

  Thus, according to the vehicle ventilation control method of the fourth aspect, the operating conditions when operating the ventilation means, that is, the solar radiation intensity lower limit value and the solar radiation intensity increase duration lower limit value are determined according to the estimated outside air temperature. Therefore, the vehicle interior can be ventilated more efficiently.

  The vehicle ventilation control method according to claim 5 is the vehicle ventilation control method according to claim 3 or claim 4, wherein the solar radiation intensity upper limit value and the solar radiation are based on the outside air temperature estimated in the outside air temperature estimating step. A stop condition setting step for setting a lower intensity lowering duration lower limit value, and in the ventilation control step, the duration of the state in which the solar radiation intensity irradiated to the vehicle is lower than the upper solar radiation intensity upper limit value. The ventilation means is stopped when it is determined that the lower limit value of intensity lowering duration is exceeded.

  In the vehicle ventilation control method according to the fifth aspect, the solar radiation intensity upper limit value and the solar radiation intensity lowering duration lower limit value are set based on the external air temperature estimated in the external air temperature estimation step in the stop condition setting step. Then, the ventilation means is stopped when it is determined in the ventilation control step that the duration of the solar radiation applied to the vehicle is lower than the solar radiation intensity upper limit value and exceeds the solar radiation intensity lowering duration lower limit value.

  As described above, according to the vehicle ventilation control method of the fifth aspect, the stop condition when stopping the ventilation means, that is, the solar radiation intensity upper limit value and the solar radiation intensity lowering duration lower limit value according to the estimated outside air temperature. Therefore, the vehicle interior can be ventilated more efficiently.

  Moreover, in order to solve the said subject, the vehicle ventilation apparatus of Claim 6 is a solar cell with which the vehicle was equipped, The switching means for switching the output of the said solar cell to a short circuit state and an open state A short-circuit current detection unit for detecting a short-circuit current of the solar cell when the output of the solar cell is short-circuited by the switching unit; and an output of the solar cell is opened by the switching unit Sometimes an open voltage detection means for detecting an open voltage of the solar cell, a ventilation means for ventilating a vehicle interior of the vehicle, a short circuit current detected by the short circuit current detection means and the open voltage detection means And control means for controlling the operation of the ventilation means in accordance with the open voltage detected by.

  In the vehicle ventilator according to the sixth aspect, when the output of the solar cell is switched to the short circuit state by the switching unit, the short circuit current at this time is detected by the short circuit current detection unit. On the other hand, when the output of the solar cell is switched to the open state by the switching means, the open voltage at this time is detected by the open voltage detection means. And a control means controls operation | movement of a ventilation means according to the short circuit current detected by the short circuit current detection means, and the open circuit voltage detected by the open circuit voltage detection means.

  Thus, according to the vehicle ventilation device of the sixth aspect, the operation of the ventilation means can be controlled without using the outside air temperature sensor.

  The vehicle ventilation device according to claim 7 is the vehicle ventilation device according to claim 6, wherein the control means is detected by the short-circuit current detected by the short-circuit current detection means and the open-circuit voltage detection means. An outside air temperature estimating function for estimating the outside air temperature of the vehicle based on an open circuit voltage is provided, and the operation of the ventilation means is controlled according to the outside air temperature estimated by the outside air temperature estimating function.

  In the vehicle ventilator according to the seventh aspect, the outside air temperature of the vehicle is estimated based on the short circuit current detected by the short circuit current detecting means and the open circuit voltage detected by the open circuit voltage detecting means in the outside air temperature estimating function. And a control means controls operation | movement of a ventilation means according to the outside temperature estimated by this outside temperature estimation function.

  Thus, according to the vehicle ventilation device of the seventh aspect, the operation of the ventilation means can be controlled according to the estimated outside air temperature.

  The vehicle ventilator according to claim 8 is the vehicle ventilator according to claim 7, wherein the control means is a solar ray applied to the solar cell from the short-circuit current detected by the short-circuit current detection means. The solar radiation intensity estimated function, the surface temperature estimation function for estimating the surface temperature of the solar cell from the open circuit voltage detected by the open circuit voltage detection means, and the solar radiation intensity estimated by the solar radiation intensity estimation function A temperature difference estimating function for estimating a temperature difference between the surface temperature of the solar cell and the outside air temperature of the vehicle, and the outside air temperature estimating function includes the temperature difference estimated by the temperature difference estimating function and the surface The outside air temperature of the vehicle is estimated from the surface temperature estimated by the temperature estimation function.

  In the vehicle ventilator according to claim 8, the solar radiation intensity radiated to the solar cell is estimated from the short-circuit current detected by the short-circuit current detecting means in the solar radiation intensity estimation function, and the open circuit voltage is estimated in the surface temperature estimation function. The surface temperature of the solar cell is estimated from the open circuit voltage detected by the detection means. Further, the temperature difference between the surface temperature of the solar cell and the outside air temperature of the vehicle is estimated from the solar radiation intensity estimated by the solar radiation intensity estimation function in the temperature difference estimation function. The outside air temperature estimating function estimates the outside air temperature of the vehicle from the temperature difference estimated by the temperature difference estimating function and the surface temperature estimated by the surface temperature estimating function.

  As described above, according to the vehicle ventilation device of the eighth aspect, the outside air temperature of the vehicle is estimated based on the short-circuit current detected by the short-circuit current detection unit and the open-circuit voltage detected by the open-circuit voltage detection unit. Can do.

  The vehicle ventilator according to claim 9 is the vehicle ventilator according to claim 8, wherein the control means is a solar radiation intensity lower limit value and a solar radiation intensity based on the outside air temperature estimated by the outside air temperature estimating function. It has an operating condition setting function for setting an upper duration lower limit value, and the duration of the state in which the solar radiation intensity irradiated to the vehicle exceeds the lower solar radiation intensity lower limit value. The ventilating means is actuated when it is determined that the value exceeds the value.

  In the vehicle ventilator according to the ninth aspect, the solar radiation intensity lower limit value and the solar radiation intensity increase duration lower limit value are set based on the external air temperature estimated by the external air temperature estimation function in the operating condition setting function. And a control means operates a ventilation means, when it is judged that the continuation time of the state in which the solar radiation intensity with which a vehicle is irradiated exceeded the solar radiation intensity lower limit exceeded the solar radiation intensity upper limit lower limit.

  Thus, according to the vehicle ventilation device of the ninth aspect, the operating conditions for operating the ventilation means, that is, the solar radiation intensity lower limit value and the solar radiation intensity increase duration lower limit value according to the estimated outside air temperature. Since it changes, ventilation of a vehicle interior can be performed more efficiently.

  The vehicle ventilator according to claim 10 is the vehicle ventilator according to claim 8 or 9, wherein the control means is a solar radiation intensity upper limit based on the outside air temperature estimated by the outside air temperature estimating function. And a stop condition setting function for setting a lower limit value of the solar radiation intensity lowering duration, and the duration of the state in which the solar radiation intensity irradiated to the vehicle falls below the upper solar radiation intensity value is less than the solar radiation intensity When the duration lower limit value is exceeded, the ventilation means is stopped.

  In the vehicle ventilator according to claim 10, the solar radiation intensity upper limit value and the solar radiation intensity lowering duration lower limit value are set based on the external air temperature estimated by the external air temperature estimation function in the stop condition setting function. And a control means stops a ventilation means, when it is judged that the duration in the state where the solar radiation intensity with which the vehicle is irradiated fell below the solar radiation intensity upper limit value exceeded the solar radiation intensity lowering duration lower limit value.

  Thus, according to the vehicle ventilator of claim 10, the stop condition when stopping the ventilation means, that is, the solar radiation intensity upper limit value and the solar radiation intensity lowering duration lower limit value according to the estimated outside air temperature. Since it changes, ventilation of a vehicle interior can be performed more efficiently.

  As described above in detail, according to the present invention, the operation of the ventilation means can be controlled without using an outside air temperature sensor.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 shows an overall view of a vehicle ventilation device 10 according to an embodiment of the present invention. The vehicle ventilator 10 is suitably equipped, for example, in a passenger car or the like, and includes a solar cell 12, a controller 14, and a ventilation motor 16 as a ventilation means as main components.

  For example, the solar cell 12 is installed on the upper surface of a roof formed on a vehicle, the upper surface of a trunk lid, the surface of a window glass, and the like, and is configured to convert the light energy of solar rays into electric power. The anode of the solar cell 12 is connected to the input unit of the controller 14, and the cathode of the solar cell 12 is grounded to the ground (vehicle body).

  The controller 14 includes a short-circuit current detection circuit 18 serving as a short-circuit current detection unit, an open-circuit voltage detection circuit 20 serving as an open-circuit voltage detection unit, a first relay 22 and a second relay 24 serving as switching units, a power supply circuit 26, A microcomputer 28 (hereinafter referred to as a microcomputer 28) as a control means is provided as a main component.

  The short-circuit current detection circuit 18 is connected to power supply lines 30 and 32 that connect the input unit and the output unit of the controller 14. And when the output (anode and cathode) of the solar cell 12 is short-circuited, the microcomputer 28 detects the short-circuit current of the solar cell 12 by the short-circuit current detection circuit 18.

  The open-circuit voltage detection circuit 20 is connected between the power supply line 30 and the microcomputer 28. And when the output of the solar cell 12 is set to the open state, the microcomputer 28 detects the open voltage of the solar cell 12 by the open voltage detection circuit 20.

  The first relay 22 is connected between the power line 32 and the ground, and the second relay 24 is connected to the power line 32. The first relay 22 and the second relay 24 are configured to be switched between a conduction state and a cutoff state in accordance with an on / off signal output from the microcomputer 28.

  The power supply circuit 26 is connected between the power supply line 30 and the microcomputer 28, receives power supplied from the solar battery 12 and supplies power to the microcomputer 28, and the output power of the solar battery 12 is less than or equal to a specified value. In such a case, power is supplied from a vehicle-mounted battery (not shown) to supply power to the microcomputer 28.

  The microcomputer 28 is activated upon receiving power supply from the power supply circuit 26 and outputs signals from the ignition switch 34, the ventilation operation switch 36, the short-circuit current detection circuit 18, and the open-circuit voltage detection circuit 20 provided in the vehicle. Accordingly, an on / off signal is output to the first relay 22 and the second relay 24. The operation of the microcomputer 28 will be described below.

  The ventilation motor 16 is connected between the output part of the controller 14 and the ground, and operates by receiving power supply from the controller 14 (when the output of the solar cell 12 decreases, it operates by receiving power supply from the in-vehicle battery). The vehicle interior of the vehicle is ventilated.

  And the vehicle ventilation apparatus 10 which consists of the said structure operate | moves as follows, for example.

  That is, when the ignition switch 34 is turned off and the ventilation operation switch 36 is turned on, the microcomputer 28 starts processing of the program shown in the flowcharts of FIGS.

  When starting the processing of the program shown in the flowchart of FIG. 2, the microcomputer 28 outputs an ON signal to the first relay 22 and outputs an OFF signal to the second relay 24, thereby short-circuiting the output of the solar cell 12 (step). S1).

  Subsequently, the microcomputer 28 detects the short-circuit current of the solar battery 12 from the short-circuit current detection circuit 18 (step S2; short-circuit current detection step).

  And the microcomputer 28 estimates the solar radiation intensity of the solar ray irradiated to the solar cell 12 from the short circuit current detected in said step S2 (step S3; solar radiation intensity estimation step, solar radiation intensity estimation function).

  In addition, the solar cell 12 has the characteristic that a short circuit current increases according to the increase in solar radiation intensity, when the solar radiation intensity of the irradiated solar rays is the same. Therefore, in the process of step S3, the solar radiation intensity irradiated to the solar cell 12 is estimated from the short circuit current using this characteristic.

  Moreover, the microcomputer 28 outputs an OFF signal to the first relay 22 and the second relay 24, respectively, and opens the output of the solar battery 12 (step S4).

  Subsequently, the microcomputer 28 detects the open voltage of the solar battery 12 from the open voltage detection circuit 20 (step S5; open voltage detection step).

  And the microcomputer 28 estimates the surface temperature of the solar cell 12 from the open circuit voltage detected in the said step S5 (step S6; surface temperature estimation step, surface temperature estimation function).

  In addition, the solar cell 12 has the characteristic that when the solar radiation intensity of the irradiated solar rays is the same, the open circuit voltage decreases as the surface temperature increases, as shown in FIG. Therefore, in the process of step S6, the surface temperature of the solar cell 12 is estimated from the open circuit voltage using this characteristic.

  Subsequently, the microcomputer 28 estimates the temperature difference between the surface temperature of the solar cell 12 and the outside air temperature of the vehicle from the solar radiation intensity estimated in step S3 (step S7; temperature difference estimation step, temperature difference estimation function).

  In addition, as FIG. 5 shows, the temperature difference (DELTA) T of the surface temperature of the solar cell 12 and the external temperature of a vehicle is proportional to the solar radiation intensity with which the solar cell 12 is irradiated. Therefore, in the process of step S7, the temperature difference between the surface temperature of the solar cell 12 and the outside air temperature of the vehicle is estimated from the solar radiation intensity estimated in step S3 using this relationship.

  Then, the microcomputer 28 estimates the outside air temperature of the vehicle from the temperature difference estimated in step S7 and the surface temperature estimated in step S6 (step S8; outside air temperature estimating step, outside air temperature estimating function).

  Subsequently, the microcomputer 28 sets the solar radiation intensity lower limit value S1, the solar radiation intensity upper limit value S2, the solar radiation intensity upper duration lower limit value Ti1, and the solar radiation intensity lower duration time, which are thresholds in the program shown in the flowchart of FIG. The lower limit Ti2 is set based on the outside air temperature estimated in step S8 and stored (step S9; operation condition setting step, stop condition setting step, operation condition setting function, stop condition setting function).

  Here, in general, when the outside temperature of the vehicle is high, the temperature in the passenger compartment increases even if the solar radiation intensity irradiated into the passenger compartment is low, and even if the solar radiation in the passenger compartment stops, The temperature is difficult to decrease. Therefore, when the outside air temperature estimated in step S8 is high, the solar radiation intensity lower limit value S1, the solar radiation intensity upper limit value S2, and the solar radiation intensity increase duration lower limit Ti1 are set to small values, and the solar radiation intensity continues below the solar intensity. The time lower limit Ti2 is set to a large value.

  On the other hand, in general, when the outside temperature of the vehicle is low, the temperature of the vehicle interior is not easily increased even if the solar radiation intensity radiated into the vehicle interior is high, and the vehicle interior when the sunlight into the vehicle interior ceases. Temperature tends to drop. Therefore, when the outside air temperature estimated in step S8 is low, the solar radiation intensity lower limit value S1, the solar radiation intensity upper limit value S2, and the solar radiation intensity increase duration lower limit value Ti1 are set to large values, and the solar radiation intensity continues below the solar radiation intensity. The time lower limit Ti2 is set to a small value.

  Then, the microcomputer 28 ends the processing of the program shown in the flowchart of FIG. 2, and starts the processing of the program shown in the flowchart of FIG.

  When starting the processing of the program shown in the flowchart of FIG. 3, the microcomputer 28 determines whether the solar radiation intensity irradiated to the vehicle exceeds the solar radiation intensity lower limit S1 (step S11).

  In addition, the microcomputer 28 performs the same process as the above-mentioned step S1 to step S3 in the process of step S11, and the sun that irradiates the vehicle with the solar radiation intensity irradiated on the solar cell 12 estimated in this process. Let it be the solar radiation intensity.

  Here, when the microcomputer 28 determines that the solar radiation intensity irradiated to the vehicle does not exceed the solar radiation intensity lower limit S1 (step S11: NO), the timer is reset (step S15), and step S11. Return to the process.

  On the other hand, if the microcomputer 28 determines that the solar radiation intensity irradiated to the vehicle exceeds the solar radiation intensity lower limit S1 (step S11: YES), the microcomputer 28 determines whether the timer has been set (step S12). .

  Here, when the microcomputer 28 determines that the timer has not been set (step S12: NO), the microcomputer 28 sets the timer (step S16) and returns to the process of step S11.

  On the other hand, when determining that the timer has been set (step S12: YES), the microcomputer 28 determines whether or not the timer has exceeded the solar radiation intensity increase duration lower limit Ti1 (step S13).

  If the microcomputer 28 determines that the timer does not exceed the solar radiation intensity increase duration lower limit Ti1 (step S13: NO), the microcomputer 28 returns to the process of step S11.

  On the other hand, when the microcomputer 28 determines that the timer has exceeded the solar radiation intensity increase duration lower limit Ti1 (step S13: YES), it outputs an OFF signal to the first relay 22 and an ON signal to the second relay 24. And the ventilation motor 16 is operated (step S14; ventilation control step).

  That is, the microcomputer 28 does not operate the ventilation motor 16 even if the solar radiation intensity irradiated to the vehicle temporarily increases, and the state where the solar radiation intensity irradiated to the vehicle is increased for a predetermined time. When it is continued, the ventilation motor 16 is operated.

  Subsequently, when operating the ventilation motor 16, the microcomputer 28 determines whether or not the solar radiation intensity irradiated to the vehicle is lower than the solar radiation intensity upper limit S2 (step S21).

  In the process of step S21, the microcomputer 28 performs the same process as the above-described step S1 to step S3, and the sun that irradiates the vehicle with the solar radiation intensity irradiated on the solar cell 12 estimated in this process. Let it be the solar radiation intensity.

  Here, when the microcomputer 28 determines that the solar radiation intensity irradiated to the vehicle is not lower than the solar radiation intensity upper limit S2 (step S21: NO), the timer is reset (step S25), and step S21. Return to the process.

  On the other hand, if the microcomputer 28 determines that the solar radiation intensity irradiated to the vehicle is below the solar radiation intensity upper limit S2 (step S21: YES), the microcomputer 28 determines whether or not the timer has been set (step S22). .

  If the microcomputer 28 determines that the timer has not been set (step S22: NO), the microcomputer 28 sets the timer (step S26) and returns to the process of step S21.

  On the other hand, when the microcomputer 28 determines that the timer has been set (step S22: YES), the microcomputer 28 determines whether or not the timer has exceeded the solar radiation intensity lowering duration lower limit Ti2 (step S23).

  If the microcomputer 28 determines that the timer does not exceed the solar radiation intensity lowering duration lower limit Ti2 (step S23: NO), the microcomputer 28 returns to the processing of step S21.

  On the other hand, when the microcomputer 28 determines that the timer has exceeded the solar radiation intensity lowering duration lower limit Ti2 (step S23: YES), the microcomputer 28 outputs an OFF signal to the second relay 24 and stops the ventilation motor 16 ( Step S24: Ventilation control step).

  That is, the microcomputer 28 does not stop the ventilation motor 16 even if the solar radiation intensity irradiated to the vehicle temporarily decreases, and the state where the solar radiation intensity irradiated to the vehicle is reduced for a predetermined time. If it is continued, the ventilation motor 16 is stopped.

  And according to the vehicle ventilation apparatus 10 which concerns on one Embodiment of this invention, there exist the following effect | actions and effects.

  That is, according to the vehicle ventilator 10 according to the embodiment of the present invention, the ventilation motor 16 is not operated even if the solar radiation intensity irradiated to the vehicle temporarily increases, so that the vehicle is irradiated. Wasteful power consumption of the solar cell 12 (or on-vehicle battery) due to the operation of the ventilation motor 16 when the solar radiation intensity temporarily increases can be suppressed.

  Further, since the ventilation motor 16 is activated when the state in which the solar radiation intensity of the sunlight irradiated to the vehicle is increased for a predetermined time, the ventilation according to the temperature rise in the passenger compartment can be effectively performed. it can.

  Moreover, since the ventilation motor 16 is not stopped even if the solar radiation intensity irradiated to the vehicle temporarily decreases, the ventilation motor 16 in the case where the solar radiation intensity irradiated to the vehicle temporarily decreases. An increase in temperature in the passenger compartment due to the stop can be suppressed.

  In addition, since the ventilation motor 16 is stopped when the state in which the solar radiation intensity applied to the vehicle is reduced for a predetermined time, the solar radiation intensity applied to the vehicle continues to decrease and ventilation is performed. Even if the motor 16 is not operated, ventilation can be stopped when the temperature in the passenger compartment decreases, and wasteful power consumption of the solar cell 12 (or on-vehicle battery) can be suppressed.

  In addition, the operating condition and the stop condition when operating the ventilation motor 16, that is, the solar radiation intensity lower limit value S1, the solar radiation intensity upper duration lower limit value Ti1, the solar radiation intensity upper limit value S2, and the solar radiation intensity lowering duration lower limit value Ti2 are set. Since the air temperature is changed according to the estimated outside air temperature, the passenger compartment can be ventilated more efficiently.

  In other words, when the outside air temperature is high, the solar radiation intensity lower limit value S1 and the solar radiation intensity increase duration lower limit value Ti1 are set to small values, so that the ventilation operation timing is accelerated and the temperature rise in the passenger compartment is suppressed. it can.

  In addition, when the outside air temperature is high, the solar radiation intensity upper limit value S2 is set to a small value, and the solar radiation intensity lowering duration lower limit value Ti2 is set to a large value, thereby delaying the ventilation stop timing, Temperature rise in the passenger compartment can be suppressed.

  Further, when the outside air temperature is low, the solar radiation intensity lower limit value S1 and the solar radiation intensity increase duration lower limit value Ti1 are set to a large value, so that the ventilation operation timing is delayed and the solar cell 12 (or on-vehicle equipment) The wasteful power consumption of the battery) can be suppressed.

  In addition, when the outside air temperature is low, the solar radiation intensity upper limit value S2 is set to a large value, and the solar radiation intensity lowering duration lower limit value Ti2 is set to a small value. Wasteful power consumption of the battery 12 (or on-vehicle battery) can be suppressed.

  The solar radiation intensity lower limit value S1, the solar radiation intensity upper limit value S2, the solar radiation intensity upper duration lower limit value Ti1, and the solar radiation intensity lower duration lower limit value Ti2 are set according to the outside air temperature. Therefore, an outside air temperature sensor can be dispensed with.

  That is, the operation of the ventilation motor 16 can be controlled according to the estimated outside air temperature without using the outside air temperature sensor. Thereby, by increasing the power consumption at the time of ventilation by starting an outside air temperature sensor and a controller (for example, an air conditioner ECU) associated therewith, and by using a harness for connecting the outside air temperature sensor and the control unit Cost increase can be prevented.

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited above, Of course, it can change and implement variously within the range which does not deviate from the main point. .

  For example, in the above embodiment, the ventilation motor 16 is operated and stopped (that is, turned on / off). However, the operation amount (that is, the ventilation amount) of the ventilation motor 16 is adjusted without stopping the ventilation motor 16. It may be configured as described above.

  Moreover, in the said embodiment, after the microcomputer 28 performs the process of the program shown by the flowchart of FIG. 2, the operation | movement of the ventilation motor 16 is controlled by performing the process of the program shown by the flowchart of FIG. However, the operation of the ventilation motor 16 may be controlled by the microcomputer 28 executing other processes.

  Moreover, in the said embodiment, although the 1st relay 22 and the 2nd relay 24 were used in order to switch the output of the solar cell 12 to a short circuit state and an open state, a solar cell is used by using another switching mechanism. The twelve outputs may be configured to be switched between a short circuit state and an open state.

  Moreover, in the said embodiment, the solar radiation intensity irradiated to the solar cell 12, the surface temperature of the solar cell 12, the surface temperature of the solar cell 12, and the external temperature of a vehicle from the short circuit current and open circuit voltage of the solar cell 12 The vehicle outside air temperature was estimated from the temperature difference and the surface temperature, and a data table or the like in which the relationship between the short-circuit current and the open-circuit voltage and the vehicle outside air temperature was set in advance was used. The outside air temperature of the vehicle may be estimated directly from the short-circuit current and the open-circuit voltage of the solar battery 12.

  In addition, a pattern table of the short-circuit current and open-circuit voltage of the solar battery 12 and the operating state of the ventilation motor 16 (in the pattern table, the estimated outside air temperature information of the vehicle is substantially included) in the microcomputer 28 is previously stored. The microcomputer 28 may be configured to extract the operation state of the ventilation motor 16 from the short circuit current and the open voltage of the solar battery 12 according to the pattern table and control the ventilation motor 16.

It is a figure showing the whole vehicle ventilation device composition concerning one embodiment of the present invention. It is a figure which shows the flow of operation | movement of the vehicle ventilator which concerns on one Embodiment of this invention. It is a figure which shows the flow of operation | movement of the vehicle ventilator which concerns on one Embodiment of this invention. It is a figure which shows the voltage-current characteristic of a solar cell. It is a figure which shows the relationship between the temperature difference of the surface temperature of a solar cell, the external temperature of a vehicle, and solar radiation intensity.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Vehicle ventilation apparatus 12 Solar cell 16 Ventilation motor (ventilation means)
18 Short-circuit current detection circuit (short-circuit current detection means)
20 Open-circuit voltage detection circuit (open-circuit voltage detection means)
22 First relay (part of switching means)
24 Second relay (part of switching means)
28 Microcomputer (control means)

Claims (10)

A short-circuit current detection step of detecting a short-circuit current of the solar cell with a short-circuit state of an output of the solar cell mounted on the vehicle;
An open-circuit voltage detecting step for detecting an open-circuit voltage of the solar cell with the output of the solar cell in an open state;
A ventilation control step for controlling the operation of the ventilation means for ventilating the vehicle interior of the vehicle according to the short circuit current detected in the short circuit current detection step and the open circuit voltage detected in the open circuit voltage detection step;
A ventilation control method for a vehicle, comprising: An outside air temperature estimating step for estimating the outside air temperature of the vehicle based on the short circuit current detected in the short circuit current detecting step and the open circuit voltage detected in the open circuit voltage detecting step,
2. The vehicle ventilation control method according to claim 1, wherein in the ventilation control step, the operation of the ventilation unit is controlled in accordance with the outside air temperature estimated in the outside air temperature estimating step. A solar radiation intensity estimating step for estimating the solar radiation intensity of solar light irradiated on the solar cell from the short circuit current detected in the short circuit current detecting step;
A surface temperature estimation step for estimating the surface temperature of the solar cell from the open circuit voltage detected in the open circuit voltage detection step;
A temperature difference estimating step for estimating a temperature difference between the surface temperature of the solar cell and the outside air temperature of the vehicle from the solar radiation intensity estimated in the solar radiation intensity estimating step;
With
3. The outside air temperature of the vehicle is estimated from the temperature difference estimated in the temperature difference estimation step and the surface temperature estimated in the surface temperature estimation step in the outside air temperature estimation step. A vehicle ventilation control method. An operating condition setting step for setting a solar radiation intensity lower limit value and a solar radiation intensity increase duration lower limit value based on the external air temperature estimated in the external air temperature estimation step,
In the ventilation control step, when it is determined that the duration of the solar radiation applied to the vehicle exceeds the lower limit value of the solar radiation intensity, the ventilation means The vehicle ventilation control method according to claim 3, wherein the vehicle is operated. A stop condition setting step for setting a solar radiation intensity upper limit value and a solar radiation intensity lowering duration lower limit value based on the external air temperature estimated in the external air temperature estimation step,
In the ventilation control step, if it is determined that the duration of the state in which the solar radiation intensity irradiated to the vehicle is below the upper solar radiation intensity upper limit value has exceeded the lower solar radiation intensity lower duration lower limit value, the ventilation means The vehicle ventilation control method according to claim 3 or 4, wherein the vehicle is stopped. A solar cell installed in the vehicle;
Switching means for switching the output of the solar cell between a short circuit state and an open state;
A short-circuit current detection means for detecting a short-circuit current of the solar battery when the output of the solar battery is short-circuited by the switching means;
An open-circuit voltage detection means for detecting an open-circuit voltage of the solar cell when the output of the solar cell is opened by the switching means;
A ventilation means for ventilating the interior of the vehicle;
Control means for controlling the operation of the ventilation means according to the short-circuit current detected by the short-circuit current detection means and the open-circuit voltage detected by the open-circuit voltage detection means;
A vehicle ventilator characterized by comprising:   The control means includes an outside air temperature estimation function for estimating the outside air temperature of the vehicle based on the short circuit current detected by the short circuit current detecting means and the open circuit voltage detected by the open circuit voltage detecting means, and the outside air temperature estimation function The vehicle ventilator according to claim 6, wherein the operation of the ventilation means is controlled in accordance with the outside air temperature estimated by the function. The control means includes
A solar radiation intensity estimation function for estimating the solar radiation intensity of the solar light irradiated to the solar cell from the short circuit current detected by the short circuit current detection means;
A surface temperature estimation function for estimating the surface temperature of the solar cell from the open circuit voltage detected by the open circuit voltage detection means;
A temperature difference estimation function for estimating a temperature difference between the surface temperature of the solar cell and the outside air temperature of the vehicle from the solar radiation intensity estimated by the solar radiation intensity estimation function;
With
The said outside air temperature estimation function estimates the outside air temperature of the said vehicle from the temperature difference estimated by the said temperature difference estimation function, and the surface temperature estimated by the said surface temperature estimation function. Ventilator for vehicles.   The control means has an operating condition setting function for setting a solar radiation intensity lower limit value and a solar radiation intensity uppering duration lower limit value based on the outside air temperature estimated by the outside air temperature estimating function, and the solar rays irradiated to the vehicle The ventilation means is activated when it is determined that the duration of the state in which the solar radiation intensity exceeds the lower limit value of the solar radiation intensity exceeds the lower limit value of the solar radiation intensity increase duration. Ventilator for vehicles.   The control means includes a stop condition setting function for setting a solar radiation intensity upper limit value and a solar radiation intensity lowering duration lower limit value based on the external air temperature estimated by the external air temperature estimation function, and the solar rays irradiated to the vehicle The said ventilation means is stopped when the duration of the state in which the solar radiation intensity of the solar radiation intensity is less than the said solar radiation intensity upper limit exceeds the said solar radiation intensity lowering duration lower limit value, It is characterized by the above-mentioned. The vehicle ventilation device as described.

Images