JP4967918B2 - Ventilator for vehicles - Google Patents

Description

  The present invention relates to a vehicle ventilator for adjusting air in a passenger compartment in a vehicle such as a passenger car.

Conventionally, as a vehicle air conditioner for adjusting the air in the passenger compartment, for example, a configuration as disclosed in Patent Document 1 has been proposed. This conventional apparatus is provided with a concentration sensor for detecting the carbon dioxide concentration in the passenger compartment. When the concentration sensor detects a carbon dioxide concentration at a level that causes discomfort to the human body, the air conditioner is switched to the outside air introduction mode or the inside / outside air mixing mode, and the vehicle is moved from outside the vehicle via the air conditioner. Air is introduced into the room. When the concentration sensor detects a carbon dioxide concentration at a level that adversely affects the human body, the air conditioner is switched to the outside air introduction mode, and the window glass is opened, and the outside of the vehicle is opened via the air conditioner and the window. A large amount of air is forcibly introduced into the passenger compartment.
JP 2000-71752 A

  As described above, in this conventional apparatus, when the carbon dioxide concentration in the passenger compartment exceeds the specified value, the air conditioner is switched to the outside air introduction mode, or the window glass is opened, so that air enters the passenger compartment from outside the vehicle. Actively introduced. For this reason, for example, when the air environment outside the vehicle is bad, such as when the vehicle is traveling in a tunnel, even if contaminated air outside the vehicle is inevitably introduced into the vehicle interior and the carbon dioxide concentration decreases, There was a problem that the passengers felt uncomfortable.

  The present invention has been made paying attention to such problems existing in the prior art. The purpose of the present invention is to provide a vehicle ventilator that can clean the air in the passenger compartment without causing any discomfort to the passenger when the carbon dioxide concentration in the passenger compartment exceeds a specified value. It is in.

In order to achieve the above object, the present invention includes an exhaust duct that communicates with the inside and outside of a passenger compartment, a fan that is provided in the exhaust duct and exhausts air in the passenger compartment through the exhaust duct, Concentration detecting means for detecting the carbon dioxide concentration of the air, temperature detecting means for detecting the temperature in the passenger compartment, and a branch connected to the upstream side of the fan in the exhaust duct and opening into the passenger compartment A duct, switching means for selectively connecting the fan to the exhaust duct or branch duct, and control means for operating the fan according to the detection results of the concentration detection means and the temperature detection means comprising, in a case where there is an occupant in the passenger compartment, if the carbon dioxide concentration of the air in the passenger compartment exceeds a predetermined value, said control means, the air conditioning system of the vehicle to the outside air cutoff mode Rutotomoni, in a state in which the switching means is switched to the exhaust duct side, said fan is operated based on a detection result from the concentration detector, the cabin air through the exhaust duct is discharged to the outside of the vehicle, When there is no passenger in the passenger compartment and the temperature in the passenger compartment exceeds a specified value, the control means starts from the temperature detecting means in a state where the switching means is switched to the branch duct side. The fan is operated based on the detection result, and hot air in the passenger compartment is discharged outside the vehicle through the branch duct .

  Therefore, when the carbon dioxide concentration in the passenger compartment exceeds a specified value, the air in the passenger compartment is cleaned by exhausting the air in the passenger compartment outside the vehicle without introducing a large amount of air outside the vehicle by an air conditioner or the like. be able to. Therefore, for example, when the vehicle is traveling in a tunnel, even when the air environment outside the vehicle is bad, it is possible to suppress the introduction of a large amount of contaminated air outside the vehicle into the vehicle interior, Comfort can be improved.

In addition, by sharing the fan, it is possible to perform ventilation when the temperature in the passenger compartment exceeds the specified value and ventilation when the carbon dioxide concentration of the air in the passenger compartment exceeds the specified value, The structure of the device can be simplified.

  Here, the presence or absence of a passenger in the passenger compartment is determined by the control means based on the state of some switch, and examples of this switch include an ignition switch and a seat seating detection switch. .

In addition, when the carbon dioxide concentration of the air in the passenger compartment exceeds a predetermined value, the air conditioner of the vehicle is configured to be in the outside air blocking mode, so that the air in the passenger compartment is gradually replaced and the contaminated outside air is Intrusion into the room can be suppressed.

  Here, the outside air blocking mode refers to a mode in which the air conditioner blocks the introduction of outside air regardless of the rotation of the air conditioning fan, that is, a mode in which outside air is not introduced through the air conditioning apparatus. Therefore, if the introduction of the outside air is blocked, the mode in which the inside air is actively circulated by the air conditioning fan and the mode in which the air conditioning fan is stopped are also set as the outside air blocking mode.

  Further, in the above configuration, when the carbon dioxide concentration of the air in the passenger compartment exceeds a second prescribed value that is higher than the prescribed value, the control means sets the air conditioner to the outside air introduction mode so that the outside air enters the passenger compartment. It is recommended to force the introduction. In such a configuration, when the carbon dioxide concentration exceeds a second specified value that is higher than the specified value, the air in the passenger compartment can be replaced in a short time.

  Furthermore, in the above configuration, a pollution detection means for detecting a pollution state of air outside the vehicle is provided, and when the carbon dioxide concentration in the vehicle interior exceeds the second specified value and the degree of pollution outside the vehicle does not exceed the specified value, The control means operates the air conditioner in the outside air introduction mode, and when the carbon dioxide concentration in the vehicle interior exceeds the second specified value and the degree of pollution outside the vehicle exceeds the specified value, the control means opens the air conditioner to the outside air. It is good to be in cut off mode. With this configuration, when the air conditioner is operating, even when the degree of pollution outside the vehicle exceeds a specified value, it is possible to suppress the introduction of contaminated air outside the vehicle into the vehicle interior. Can maintain comfort.

  As described above, according to the present invention, when the carbon dioxide concentration in the passenger compartment exceeds the specified value, the passenger compartment air is discharged outside the vehicle without causing discomfort to the passenger. The effect that it can be cleaned is exhibited.

(First embodiment)
Below, 1st Embodiment of this invention is described based on FIGS. 1-3.
As shown in FIG. 1, the vehicle 11 is equipped with a ventilation device 13 for discharging the air in the passenger compartment 12 to the outside of the passenger compartment 12. That is, on the rear side of the vehicle 11, an exhaust duct 14 that communicates the inside and outside of the passenger compartment 12 is disposed along the lower surface and the rear surface of the rear seat 15. The opening 14 a on the inlet side of the exhaust duct 14 is disposed at the position of the lower front edge of the rear seat 15. An opening 14 b on the outlet side of the exhaust duct 14 is disposed in the trunk room 16. A vent hole 17 is formed in the lower portion of the trunk room 16, and an opening 14 b on the outlet side of the exhaust duct 14 is communicated with the outside of the vehicle via the trunk room 16 and the vent hole 17.

  An exhaust fan 18 is disposed in the vicinity of the outlet side opening 14 b in the exhaust duct 14. The exhaust fan 18 is rotated by an exhaust fan motor 19 shown in FIG. 2, whereby air in the passenger compartment 12 is taken into the exhaust duct 14 from the opening 14 a on the inlet side of the exhaust duct 14. It is guided into the trunk room 16 through the exhaust duct 14. Thereafter, the air guided into the trunk room 16 is discharged outside the vehicle through the vent hole 17.

  A carbon dioxide concentration sensor (hereinafter simply referred to as a concentration sensor) as a concentration detecting means for detecting the carbon dioxide concentration of the air in the passenger compartment 12 is provided at the lower portion in the passenger compartment 12, for example, the lower portion of the front seat 20. 21 is arranged. The concentration sensor 21 detects the concentration of carbon dioxide in the air in the passenger compartment 12 and outputs the detection result to the control device 31 shown in FIG.

  As shown in FIG. 1, a branch duct 22 is connected to a portion of the exhaust duct 14 on the upstream side of the exhaust fan 18. An opening 22 a on the inlet side of the branch duct 22 is disposed on the package tray 23 at the rear of the vehicle compartment 12. A switching damper 24 as switching means for selectively connecting the exhaust fan 18 to the exhaust duct 14 or the branch duct 22 is disposed at a position upstream of the exhaust fan 18 so as to be able to switch and rotate.

  When an ignition switch (not shown) indicating that no passenger is present in the passenger compartment is turned off, the switching damper 24 is connected to the branch duct 22 side shown in FIG. 1 by the switching damper motor 25 shown in FIG. It is switched and arranged. On the other hand, when the ignition switch indicating that a passenger is present in the passenger compartment is turned on, the switching damper 24 is switched to the connection position on the exhaust duct 14 side shown in FIG. 3 by the switching damper motor 25. .

  A temperature sensor 27 as temperature detecting means for detecting the temperature in the passenger compartment 12 is disposed in the passenger compartment 12, for example, the instrument panel 26. The temperature sensor 27 detects the temperature in the passenger compartment 12 and outputs the detection result to the control device 31 shown in FIG.

Next, a circuit configuration for controlling the ventilator 13 having the above-described configuration will be described.
As shown in FIG. 2, the control device 31 constitutes a control means, and controls the operation of the ventilator 13 according to a program stored in the storage unit 32. The storage unit 32 stores data necessary for executing the program, for example, various data such as a specified value of the carbon dioxide concentration of the air in the passenger compartment 12 and a specified value of the temperature in the passenger compartment 12. The specified value is composed of a density upper limit value and a density tolerance value. For example, the density upper limit value is 0.5% and the density tolerance value is 0.3%.

  The control device 31 inputs the detection result of the carbon dioxide concentration of the air in the passenger compartment 12 from the concentration sensor 21 when the ignition switch indicating that the passenger is present in the passenger compartment is turned on, and enters the passenger compartment. The detection result of the temperature in the passenger compartment 12 is input from the temperature sensor 27 when the ignition switch indicating that no passenger is present is turned off. Further, the control device 31 outputs an operation command to the switching damper motor 25 when the ignition switch is turned off to switch the switching damper 24 to the branch duct 22 side shown in FIG. 1, and at the time of turning on the ignition switch, the switching damper An operation command is output to the motor 25, and the switching damper 24 is switched to the exhaust duct 14 side shown in FIG. Further, the control device 31 outputs an operation command to the exhaust fan motor 19 according to the detection result from the concentration sensor 21 or the temperature sensor 27 to operate the exhaust fan 18.

Next, the operation of the ventilation device 13 configured as described above will be described.
When the ignition switch is turned off, for example, when the vehicle 11 is parked for a long time, the switching damper 24 is switched to the connection position on the branch duct 22 side as shown in FIG. If the temperature (air temperature) in the passenger compartment 12 exceeds a specified value (for example, 70 degrees) stored in the storage unit 32 while the vehicle 11 is parked, the control device according to the detection result from the temperature sensor 27 An operation command is output from 31 to the exhaust fan motor 19 and the exhaust fan 18 is rotated. By the rotation of the exhaust fan 18, hot air in the passenger compartment 12 is guided to the trunk room 16 via the branch duct 22 and then discharged to the outside via the vent hole 17. Then, when the temperature in the passenger compartment 12 decreases to, for example, 60 degrees, the exhaust fan 18 is stopped. Therefore, it is possible to prevent the temperature in the passenger compartment 12 from rising abnormally while the vehicle 11 is parked for a long time.

  Further, when the ignition switch is turned on, for example, when the vehicle 11 is running, the switching damper 24 is switched to the connection position on the exhaust duct 14 side by the switching damper motor 25 as shown in FIG. For example, in the inside air circulation mode in which the air conditioner (not shown) is shut off from the outside air during driving of the vehicle 11, the carbon dioxide concentration of the air in the passenger compartment 12 is the concentration of the prescribed value stored in the storage unit 32. When the upper limit (0.5%) is exceeded, an operation command is output from the control device 31 to the exhaust fan motor 19 in accordance with the detection result from the concentration sensor 21, and the exhaust fan 18 is rotated. For this reason, after the air in the vehicle compartment 12 is guided to the trunk room 16 through the exhaust duct 14, it is discharged outside the vehicle through the vent hole 17, and the air outside the vehicle is exhausted through the gap of the door and the like. It is gradually introduced into the passenger compartment. Therefore, it is possible to prevent the passenger from feeling uncomfortable due to an increase in the carbon dioxide concentration of the air in the passenger compartment 12 during driving of the vehicle 11. When the carbon dioxide concentration in the passenger compartment falls below the allowable value (0.3%), the exhaust fan 18 is stopped.

Therefore, in the first embodiment, the following effects can be obtained.
(1) When the carbon dioxide concentration in the passenger compartment 12 rises, the air in the passenger compartment 12 is discharged outside the vehicle without actively introducing the air outside the passenger compartment 12, so that the carbon dioxide concentration of the indoor air is increased. A reduction is achieved. Therefore, even when the air environment outside the passenger compartment 12 is bad, for example, when the vehicle 11 is traveling in a tunnel, a large amount of contaminated air outside the passenger compartment 12 is rapidly introduced into the passenger compartment 12. It can be suppressed and high comfort can be obtained.

  (2) When the air in the passenger compartment 12 is discharged, the opening 14a on the inlet side of the exhaust duct 14 is disposed at the position of the lower front edge of the rear seat 15, so that it stays near the lower portion in the passenger compartment 12. The carbon dioxide that is present can be efficiently taken into the exhaust duct 14 from the opening 14a. Therefore, the air with a high carbon dioxide concentration in the passenger compartment 12 can be discharged out of the passenger compartment 12 in a short time.

  (3) The carbon dioxide concentration in the air in the passenger compartment 12 exceeds the specified value when the temperature in the passenger compartment 12 exceeds the specified value while the vehicle 11 is parked for a long time, and when the vehicle 11 is running. In both cases, the air in the passenger compartment 12 is discharged by the operation of the common exhaust fan 18. For this reason, the structure of the ventilation apparatus 13 can be simplified.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS. 4 and 5 with a focus on differences from the first embodiment.

  In the second embodiment, the second specified value (for example, 1.0%) in which the carbon dioxide concentration of the air in the passenger compartment 12 is higher than the upper limit value of the specified value in the first embodiment is set. Has been. When the carbon dioxide concentration in the passenger compartment 12 exceeds the second predetermined value, the air conditioner 41 in the instrument panel 26 is operated.

  That is, as shown in FIG. 4, the air conditioner 41 is provided with an outside air introduction duct 42 that communicates the inside and outside of the passenger compartment 12. The opening 42a on the inlet side of the outside air introduction duct 42 is opened toward the outside, and the opening 42b on the outlet side of the outside air introduction duct 42 is opened toward the inside of the vehicle compartment 12. An inside air circulation duct 43 is connected to the center of the outside air introduction duct 42, and an opening 43 a on the inlet side of the inside air circulation duct 43 is opened toward the inside of the passenger compartment 12 at the lower part of the instrument panel 26.

  In the outside air introduction duct 42, an air conditioning fan 44 is disposed at a position downstream of the connection portion of the inside air circulation duct 43. Then, a command signal is output from the control device 31 to the air conditioning fan motor 45 shown in FIG. 5, whereby the air conditioning fan 44 is rotated and the air in the passenger compartment 12 is adjusted.

  As shown in FIG. 4, a switching damper 46 is disposed at a connection portion of the inside air circulation duct 43 with respect to the outside air introduction duct 42 so as to be able to switch and rotate. When the inside air circulation mode, which is the outside air shutoff mode, is set by operating an air conditioning switch not shown or the like, a command signal is output from the control device 31 to the switching damper motor 47 shown in FIG. Thus, the switching damper 46 is disposed at the connection position on the side of the inside air circulation duct 43 shown by a solid line in FIG. On the other hand, when the outside air introduction mode is set, the switching damper motor 47 arranges the switching damper 46 at the connection position on the outside air introduction duct 42 side indicated by a chain line in FIG.

  In the vicinity of the opening 42b on the outlet side of the outside air introduction duct 42, a nitrogen oxide detection sensor (hereinafter referred to as NOx sensor) 48 as a contamination detection means is disposed. During the driving of the vehicle 11, the NOx sensor 48 detects the contamination state of the air outside the passenger compartment 12 and outputs the detection result to the control device 31.

  Further, in the second embodiment, in the storage unit 32 shown in FIG. 5, similarly to the first embodiment, the storage unit 32 stores the specified value of the carbon dioxide concentration in the air in the passenger compartment 12, and the passenger compartment 12. In addition to storing the specified value of the internal temperature, as described above, the second specified value that is higher than the specified value of the carbon dioxide concentration, and the specified value indicating the degree of contamination of the air outside the passenger compartment 12 are also included. It is remembered.

  If the temperature in the passenger compartment 12 exceeds a specified value when the ignition switch is turned off, the exhaust of the ventilator 13 is determined according to the detection result of the temperature sensor 27 as in the case of the first embodiment. The fan 18 is operated, and the hot air in the passenger compartment 12 is discharged out of the passenger compartment 12 through the branch duct 22.

  Further, when the ignition switch is turned on and the carbon dioxide concentration of the air in the passenger compartment 12 exceeds a specified value, ventilation is performed according to the detection result of the concentration sensor 21 as in the case of the first embodiment. The exhaust fan 18 of the device 13 is operated, and the air in the passenger compartment 12 is discharged out of the passenger compartment 12 through the exhaust duct 14.

  Further, when the ignition switch is turned on, if the carbon dioxide concentration of the air in the passenger compartment 12 exceeds a second specified value that is higher than the specified value, the exhaust fan of the ventilator 13 is the same as in the above case. 18 is operated, and the air in the passenger compartment 12 is discharged out of the passenger compartment 12 through the exhaust duct 14. At the same time, the air conditioner 41 is set to the outside air introduction mode or the inside air circulation mode according to the detection result from the NOx sensor 48.

  That is, when the degree of contamination outside the passenger compartment 12 does not exceed the specified value, the air conditioner 41 is switched to the outside air introduction mode, and the switching damper 46 is connected to the outside air introduction duct 42 as shown by a chain line in FIG. It is arranged at the connection position on the side. When the air conditioning fan 44 is rotated in this state, the air outside the vehicle compartment 12 is actively introduced into the vehicle compartment 12 via the outside air introduction duct 42, and the air inside the vehicle compartment 12 is quickly squeezed. To be cleaned.

  On the other hand, when the degree of contamination outside the passenger compartment 12 exceeds the specified value, the air conditioner 41 is switched to the inside air circulation mode, and the switching damper 46 is set to the inside air as shown by the solid line in FIG. It arrange | positions in the connection position by the side of the circulation duct 43, and the air conditioner 41 will be in the interruption | blocking state with respect to external air. Then, when the contamination state outside the vehicle falls below the predetermined value, the switching damper 46 of the air conditioner 41 is switched to the outside air introduction side, and the air in the passenger compartment 12 is quickly replaced.

Therefore, in the second embodiment, in addition to the effects described in the first embodiment, the following effects can be obtained.
(4) When the carbon dioxide concentration exceeds the second specified value that is higher than the specified value, the air conditioner 41 enters the outside air introduction mode, so that the air in the passenger compartment 12 can be effectively cleaned.

  (5) When the air conditioner 41 is operated together with the ventilator 13, the operation state of the air conditioner 41 is switched between the outside air introduction mode and the inside air circulation mode according to the contamination state of the air outside the passenger compartment 12. For this reason, when the pollution degree of the air outside the passenger compartment 12 exceeds the second specified value as described above, the air conditioner 41 is operated in the outside air introduction mode, and the air inside the passenger compartment 12 is quickly removed. Can be replaced. On the other hand, for example, when the vehicle 11 is traveling in a tunnel and the degree of air pollution outside the vehicle compartment 12 exceeds a specified value, the air conditioner 41 is operated in the internal air circulation mode, It is possible to suppress the introduction of outside contaminated air into the vehicle compartment 12.

(Example of change)
In addition, this embodiment can also be changed and embodied as follows.
The exhaust duct 14 and the branch duct 22 are placed at positions different from those in the above embodiments, for example, the ceiling of the vehicle compartment 12.

  In the second embodiment, the window glass is configured to be opened in the outside air introduction mode that accompanies the detection of the second predetermined value of the carbon dioxide concentration.

1 is a schematic cross-sectional view of a vehicle including a vehicle ventilation device according to a first embodiment. The block diagram which shows the circuit structure for controlling the vehicle ventilator of FIG. The schematic sectional drawing which shows the different switching operation state of the vehicle ventilator of FIG. The schematic sectional drawing of the vehicle provided with the vehicle ventilator of 2nd Embodiment. The block diagram which shows the circuit structure for controlling the vehicle ventilator of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Vehicle, 12 ... Vehicle compartment, 13 ... Ventilation device, 14 ... Exhaust duct, 14a ... Entrance side opening, 15 ... Rear seat, 18 ... Exhaust fan, 21 ... Carbon dioxide concentration sensor as concentration detection means, 22 ... Branch duct, 22a ... opening on the inlet side, 24 ... switching damper as switching means, 27 ... temperature sensor as temperature detecting means, 31 ... control device as control means, 32 ... storage unit, 41 ... air conditioner, 42 ... An outside air introduction duct, 43... An inside air circulation duct, 44... An air conditioning fan, 46.

Claims (3)

An exhaust duct communicating inside and outside the passenger compartment;
A fan provided in the exhaust duct for discharging the air in the passenger compartment through the exhaust duct;
A concentration detecting means for detecting the carbon dioxide concentration of the air in the passenger compartment;
Temperature detecting means for detecting the temperature in the passenger compartment;
A branch duct that is connected to the upstream side of the fan in the exhaust duct and opens into the vehicle interior;
Switching means for selectively connecting the fan to the exhaust duct or branch duct;
And control means for operating the fan in accordance with a detection result of the concentration detecting means and the temperature detecting means,
When a passenger is present in the passenger compartment, and the carbon dioxide concentration of the air in the passenger compartment exceeds a specified value, the control means sets the air conditioner of the vehicle to an outside air blocking mode, and the switching means In the state switched to the exhaust duct side, the fan is operated based on the detection result from the concentration detection means, and the air in the vehicle compartment is discharged outside the vehicle through the exhaust duct ,
When there is no passenger in the passenger compartment and the temperature in the passenger compartment exceeds a specified value, the control means starts from the temperature detecting means in a state where the switching means is switched to the branch duct side. The vehicle ventilator is characterized in that the fan is operated based on the detection result to discharge the hot air in the passenger compartment to the outside of the vehicle through the branch duct . When the carbon dioxide concentration of the air in the passenger compartment exceeds a second prescribed value that is higher than the prescribed value, the control means sets the air conditioner to the outside air introduction mode and forcibly introduces the outside air into the passenger compartment. The vehicle ventilation device according to claim 1 . Provide pollution detection means to detect the pollution state of the air outside the vehicle,
When the carbon dioxide concentration in the passenger compartment exceeds the second specified value and the degree of pollution outside the vehicle does not exceed the specified value, the control means operates the air conditioner in the outside air introduction mode,
3. The control device according to claim 2 , wherein when the carbon dioxide concentration in the vehicle interior exceeds the second specified value and the degree of pollution outside the vehicle exceeds the specified value, the control means sets the air conditioner to an outside air blocking mode. Vehicle ventilation system.

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