JP2009012567A - Air conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the electric power consumption of an exhaust fan used in a ventilation mode in an air conditioner for a vehicle having an air conditioning mode and the ventilation mode. <P>SOLUTION: This air conditioner for a vehicle comprises an outlet 18 for blowing the air blown by a blow fan 16 into a cabin and a connection duct 20 for connecting the outlet 18 to the blow fan 16. A branch duct 22 is installed in the connection duct 20. In the air conditioning mode for controlling the air conditioning in the cabin, the air blown by the blow fan 16 is blown into the cabin through the connection duct 20 and the outlet 18. In the ventilation mode for exhausting the air inside the cabin to the outside of the cabin, the air inside the cabin is discharged to the outside of the cabin by the exhaust fan 28 through a first route A formed of the outlet 18 and the connection duct 20 and a second route B formed of an inlet 24 and a branch duct 22. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle air conditioner.

Conventionally, an air conditioner function (air conditioner function) that adjusts the temperature and humidity of the passenger compartment by blowing out the air adjusted by the air conditioner unit, and a passenger compartment when the vehicle is parked under hot weather, for example, by exhausting the air in the passenger compartment 2. Description of the Related Art A vehicle air conditioner having a ventilation function that suppresses an increase in temperature is known (see Patent Document 1).
The vehicle air conditioner described in Patent Document 1 can exhaust the air in the upper part of the passenger compartment by using the upper air conditioning duct in the ventilation mode, and can also exhaust the air outlet of the upper air conditioning duct and the air outlet of the lower air conditioning duct in the air conditioning mode. Both are designed to blow air conditioned air. As a result, it is possible to efficiently exhaust hot air or the like easily trapped in the upper part of the passenger compartment to the outside of the passenger compartment using an existing air conditioning duct.

JP 2004-352085 A

  However, the above-described conventional vehicle air conditioner exhausts air using an air conditioning duct. Therefore, if the heat trapped in the vehicle interior is exhausted in a short time, the ventilation resistance of the air conditioning duct is too large. There is a problem that the power consumption of the exhaust fan used in the mode increases. In particular, when an in-vehicle battery is used as the power supply for the exhaust fan, the engine is usually stopped in the ventilation mode, so the in-vehicle battery may rise due to overdischarge. .

  The present invention has been made in view of the above circumstances, and an object of the present invention is to reduce power consumption of an exhaust fan used in a ventilation mode in a vehicle air conditioner having an air conditioning mode and a ventilation mode. To do.

Means for solving the problems are the following inventions.
The first invention is a blower fan that blows air adjusted by a heat exchanger, a blower outlet that blows air blown by the blower fan into a vehicle interior, and a connection duct that connects the blower outlet and the blower fan. A branch duct is provided in the middle of the connection duct, and a suction port is provided at the end of the branch duct, and air from the suction port to the vehicle interior And an exhaust fan for exhausting the vehicle interior to the outside of the passenger compartment, and switching between an air conditioning mode for controlling the air conditioning in the passenger compartment and a ventilation mode for exhausting the air in the passenger compartment to the outside of the passenger compartment. The air blown by the blower fan is blown out into the passenger compartment through the connection duct and the blower outlet, and in the ventilation mode, the blower outlet and the front Air in the vehicle compartment is exhausted outside the vehicle compartment by the exhaust fan through a first route constituted by a connection duct and a second route constituted by the suction port and the branch duct. It is a vehicle air conditioner.

  According to the first aspect, in the air conditioning mode, the air conditioned by the heat exchanger can be blown out into the vehicle compartment via the connection duct and the air outlet. On the other hand, in the ventilation mode, air in the vehicle compartment is sucked and exhausted outside the vehicle compartment via the first route constituted by the outlet and the connection duct and the second route constituted by the suction port and the branch duct. be able to. In other words, in the ventilation mode, the ventilation resistance is reduced by the amount of use of the second path, so that exhaust can be performed in a short time and the power consumption of the exhaust fan used in the ventilation mode can be reduced as compared with the conventional case. Become.

  A second invention is the vehicle air conditioner according to the first invention, wherein the opening area of the suction port is larger than the opening area of the air outlet.

  According to the second aspect, since the opening area of the suction port used in the ventilation mode is larger than the opening area of the air outlet used in the air conditioning mode, the ventilation resistance in the ventilation mode is smaller than that in the air conditioning mode. Therefore, it is possible to reduce the power consumption of the exhaust fan used in the ventilation mode.

  3rd invention is a vehicle air conditioner of the said 1st invention or 2nd invention, Comprising: The cross-sectional area of the said branch duct is larger than the cross-sectional area of the said connection duct, It is a vehicle air conditioner characterized by the above-mentioned. .

  According to the third invention, since the cross-sectional area of the branch duct used in the ventilation mode is larger than the cross-sectional area of the connection duct used in the air-conditioning mode, the ventilation resistance in the ventilation mode is smaller than that in the air-conditioning mode. Therefore, it is possible to reduce the power consumption of the exhaust fan used in the ventilation mode.

  A fourth invention is the vehicle air conditioner according to any one of the first to third inventions, wherein an opening / closing damper is provided at an entrance of the branch duct, and in the air conditioning mode, the opening / closing damper is The vehicle air conditioner is characterized in that the entrance of the branch duct is closed, and the opening / closing damper opens the entrance of the branch duct in the ventilation mode.

  According to the fourth invention, since the entrance of the branch duct is closed by the open / close damper in the air conditioning mode, the air regulated by the heat exchanger is prevented from flowing into the branch duct. Therefore, since the amount of air blown from the blower outlet does not decrease, the flow rate of the air blown from the blower outlet can be maintained at a certain level or more, and the air conditioning efficiency in the vehicle interior is improved.

  According to the fourth invention, since the entrance of the branch duct is opened by the open / close damper in the ventilation mode, it is possible to exhaust the air in the vehicle interior using both the connection duct and the branch duct. Therefore, it is possible to reduce the power consumption of the exhaust fan by reducing the ventilation resistance in the ventilation mode.

  A fifth invention is the vehicle air conditioner according to any one of the first to fourth inventions, wherein the rated power consumption of the exhaust fan is smaller than the rated power consumption of the blower fan. It is a vehicle air conditioner.

  According to the fifth aspect of the present invention, since the rated power consumption of the exhaust fan used in the ventilation mode is small, even if the on-board battery is used as the power source of the exhaust fan, the on-board battery will rise due to overdischarge. Can be prevented.

  ADVANTAGE OF THE INVENTION According to this invention, in the vehicle air conditioner provided with the air conditioning mode and the ventilation mode, it becomes possible to reduce the power consumption of the exhaust fan used at the time of the ventilation mode.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view of a vehicle air conditioner 10 according to the present embodiment. FIG. 2 shows the overall configuration of the vehicle air conditioner 10 in the air conditioning mode. FIG. 3 shows the overall configuration of the vehicle air conditioner 10 in the ventilation mode.

  As shown in FIG. 1, the vehicle air conditioner 10 includes a heat exchanger 14 stored in a lower portion of a package tray 12 on the vehicle rear side, and a blower fan 16 that blows air adjusted by the heat exchanger 14. A blower outlet 18 that blows out the air blown by the blower fan 16 into the vehicle compartment and a connection duct 20 that connects the blower fan 16 and the blower outlet 18 are provided.

  The heat exchanger 14 is configured by a known evaporator, heater, or the like used for an automobile air conditioner unit. The air adjusted by the heat exchanger 14 is blown by the blower fan 16. The air blown by the blower fan 16 is blown into the vehicle interior from an air outlet 18 provided in the upper part of the vehicle interior. The air outlet 18 and the blower fan 16 are connected by a connection duct 20.

  The connecting duct 20 is provided so as to extend in the front-rear direction along the left and right side edge portions of the vehicle ceiling portion (only the left side edge portion is shown in the figure), and below the ceiling panel RP of the vehicle and the ceiling panel RP. It arrange | positions between the ceiling interior materials RL with which it is mounted | worn.

  In the middle of the connection duct 20, there is provided a branch duct 22 that branches so as to extend toward the center of the vehicle ceiling in the vehicle width direction. A suction port 24 that opens toward the vehicle interior is provided at the end of the branch duct 22.

  Further, an exhaust fan 28 is provided in the middle of the connection duct 20 to suck air in the vehicle compartment from the suction port 24 and exhaust it into the trunk 26 at the rear of the vehicle. A vent hole 29 that can exhaust the air in the trunk 26 to the outside of the vehicle is provided at the lower portion of the trunk 26, and the air exhausted into the trunk 26 by the exhaust fan 28 passes through the vent hole 29. To be exhausted.

  As shown in FIGS. 2 and 3, at the entrance of the branch duct 22, a plate-like door is rotated around a rotation shaft provided near the entrance of the branch duct 22 by a motor, thereby allowing the entrance of the branch duct 22 to be opened. An open / close damper 30 that can open and close the door is provided.

  On the suction side of the exhaust fan 28, a switching damper that can be switched between the first and second positions by rotating a plate-like door around a rotating shaft provided in a duct near the exhaust fan 28 by a motor. 31 is provided. When the switching damper 31 is in the first position, the suction side of the exhaust fan 28 is closed and the blowout side of the blower fan 16 is opened (see FIG. 2). On the contrary, when the switching damper 31 is in the second position, the suction side of the exhaust fan 28 is opened and the blowout side of the blower fan 16 is closed (see FIG. 3). .

  As shown in FIG. 2, when the vehicle air conditioner 10 is set to the air conditioning mode, the opening / closing damper 30 closes the entrance of the branch duct 22. Further, the blowing side of the blower fan 16 is opened by the switching damper 31. Then, air in the vehicle compartment is sucked from the suction port 12 a provided in the upper part of the package tray 12 and the temperature is adjusted by the heat exchanger 14. The air adjusted by the heat exchanger 14 is blown by the blower fan 16. The air blown by the blower fan 16 is blown into the vehicle interior from an air outlet 18 provided in the upper part of the vehicle interior. That is, the air adjusted by the heat exchanger 14 is blown out into the passenger compartment through the connection duct 20 and the outlet 18.

  As shown in FIG. 3, when the vehicle air conditioner 10 is set to the ventilation mode, the opening / closing damper 30 opens the entrance of the branch duct 22. Further, the suction side of the exhaust fan 28 is opened by the switching damper 31. Then, air in the vehicle compartment is sucked by the exhaust fan 28 from both the air outlet 18 and the suction port 24 provided in the upper part of the vehicle interior and exhausted into the trunk 26. That is, the air inside the vehicle compartment is exhausted by the exhaust fan 28 through the first route A constituted by the air outlet 18 and the connection duct 20 and the second route B constituted by the suction port 24 and the branch duct 22. Is exhausted.

  Therefore, according to the vehicle air conditioner 10 of the present embodiment, in the ventilation mode, the ventilation resistance is reduced by the amount of use of the second path B, compared to that in the air conditioning mode. It becomes possible to reduce more. For example, the power consumption of the exhaust fan 28, which was about 50 to 150 Wh in the prior art, can be reduced to about 5 to 10 Wh.

  Moreover, since the opening area of the suction port 24 used at the time of ventilation mode is larger than the opening area of the blower outlet 18 used at the time of air conditioning mode, the ventilation resistance at the time of ventilation mode decreases compared with the air conditioning mode. Therefore, it is possible to reduce the power consumption of the exhaust fan 28 used in the ventilation mode as compared with the conventional case.

  Further, since the cross-sectional area of the branch duct 22 used in the ventilation mode is larger than the cross-sectional area of the connection duct 20 used in the air-conditioning mode, the ventilation resistance in the ventilation mode is smaller than that in the air-conditioning mode. Therefore, it is possible to reduce the power consumption of the exhaust fan 28 used in the ventilation mode as compared with the conventional case.

  As shown in FIG. 2, when the vehicle air conditioner 10 is set to the air conditioning mode, since the entrance of the branch duct 22 is closed by the open / close damper 30, the air conditioned by the heat exchanger 14 is Inflow into the branch duct 22 is prevented. Therefore, the flow rate of the air blown out from the air outlet 18 is kept above a certain level, the flow rate of the cooling air or heating air blown to the vehicle occupant is kept above a certain level, and the air conditioning efficiency in the passenger compartment is improved.

  As shown in FIG. 3, when the vehicle air conditioner 10 is set to the ventilation mode, both the connection duct 20 and the branch duct 22 are used because the entrance of the branch duct 22 is opened by the opening / closing damper 30. It is possible to exhaust the air in the passenger compartment. Accordingly, since the ventilation resistance in the ventilation mode is reduced compared to that in the air conditioning mode, the power consumption of the exhaust fan 28 can be reduced as compared with the conventional case.

Since the ventilation resistance in the ventilation mode is small, an exhaust fan 28 smaller than the blower fan 16 can be used. That is, the rated power consumption of the exhaust fan 28 may be smaller than the rated power consumption of the blower fan 16.
By reducing the rated power consumption of the exhaust fan 28, even when the vehicle battery is used as the power source of the exhaust fan 28 in the ventilation mode in which the engine is normally stopped, the vehicle battery rises due to overdischarge. Can be prevented.

  As the exhaust fan 28, for example, an axial fan can be used. As the blower fan 16, for example, a centrifugal fan can be used.

  The switching operation between the air conditioning mode and the ventilation mode may be performed manually or automatically. For example, the air-conditioning mode may be automatically switched while the vehicle is traveling, and the ventilation mode may be automatically switched when the vehicle is stopped (when the engine is stopped).

  The ON / OFF operation of the exhaust fan 28 may be executed manually or automatically. For example, the exhaust fan 28 is automatically turned on when the vehicle interior temperature is equal to or higher than a predetermined temperature (for example, 30 degrees or higher), and the exhaust fan 28 is automatically turned on when the vehicle interior temperature is lower than a predetermined temperature (for example, lower than 30 degrees). May be automatically turned OFF.

  As described above, according to the vehicle air conditioner 10 of the present embodiment, it is possible to reduce the ventilation resistance in the ventilation mode, and the power consumption of the exhaust fan 28 used in the ventilation mode is lower than in the past. It can be greatly reduced.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.
(1) In the above embodiment, in the air-conditioning mode, the example in which the air in the passenger compartment is sucked from the suction port 12a provided at the upper part of the package tray 12 and the temperature is adjusted by the heat exchanger 14 is shown. Air outside the passenger compartment may be taken in through the suction port and the temperature may be adjusted by the heat exchanger 14.
(2) In the above embodiment, an example in which an in-vehicle battery is used as a power source for the exhaust fan 28 has been described. However, a solar battery mounted on a vehicle may be used. In this case, it can prevent more effectively that a vehicle-mounted battery goes up.
(3) In the above embodiment, the example in which the air conditioner unit including the heat exchanger 14 and the blower fan 16 is installed in the lower part of the package tray 12 is shown. May be installed.
(4) In the above embodiment, the switching damper 31 is in the first position that closes the blowing side of the blower fan 16 in the ventilation mode. However, the switching damper 31 sucks the first position and the exhaust fan 28. It may be in the middle position of the second position that closes the side (the switching damper 31 may be in the position indicated by the dotted line in FIG. 3). In this case, in the ventilation mode, hot air near the suction port 12a provided in the upper portion of the package tray 12 can be sucked from the suction port 12a and ventilated.

It is a perspective view of a vehicle air conditioner. The whole structure of the vehicle air conditioner at the time of an air-conditioning mode is shown. The whole structure of the vehicle air conditioner at the time of ventilation mode is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Vehicle air conditioner 14 ... Heat exchanger 16 ... Blower fan 18 ... Outlet 20 ... Connection duct 22 ... Branch duct 24 ... Suction port 28 ... Exhaust fan 30 ... Opening / closing damper 31 ... Switching damper A ... First path B ... second route

Claims (5)

A vehicle comprising: a blower fan that blows air regulated by a heat exchanger; a blower outlet that blows air blown by the blower fan into a vehicle interior; and a connection duct that connects the blower outlet and the blower fan. Air conditioner for
A branch duct is provided in the middle of the connection duct, a suction port is provided at the end of the branch duct, and an exhaust fan that sucks air inside the vehicle interior from the suction port and exhausts it outside the vehicle interior. It is possible to switch between an air conditioning mode for controlling air conditioning in the passenger compartment and a ventilation mode for exhausting air inside the passenger compartment to the outside of the passenger compartment,
During the air conditioning mode, the air blown by the blower fan is blown out into the passenger compartment via the connection duct and the outlet.
In the ventilation mode, the air in the vehicle compartment is moved by the exhaust fan through the first path composed of the outlet and the connection duct and the second path composed of the suction port and the branch duct. A vehicle air conditioner that is exhausted to the outside. The vehicle air conditioner according to claim 1,
The vehicle air conditioner characterized in that an opening area of the suction port is larger than an opening area of the air outlet. The vehicle air conditioner according to claim 1 or 2,
The vehicle air conditioner characterized in that a cross-sectional area of the branch duct is larger than a cross-sectional area of the connection duct. The vehicle air conditioner according to any one of claims 1 to 3,
An opening / closing damper is provided at the entrance of the branch duct, the opening / closing damper closes the entrance of the branch duct in the air conditioning mode, and the opening / closing damper opens the entrance of the branch duct in the ventilation mode. An air conditioner for a vehicle. The vehicle air conditioner according to any one of claims 1 to 4,
The vehicle air conditioner characterized in that the rated power consumption of the exhaust fan is smaller than the rated power consumption of the blower fan.

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