JP2018140650A - Air conditioner for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to use exhaust of an aspirator efficiently.SOLUTION: An air conditioner for a vehicle comprises a first case part 11 in which a motor 21 driving a blower fan 20 introducing outside air is housed, a second case part 12 which conditions the outside air introduced from the blower fan 20, a third case part 13 which introduces air within the second case 12 to inside of the vehicle and the aspirator 30 which sucks the air from a cabin on the basis of fluid flow of the air sucked from a flow passage formed between the second case part 12 and the third case part 13, and the air which is exhausted from the aspirator 30 is introduced to the first case part 11.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle air conditioner mounted on a vehicle such as an automobile, and more particularly to a device having an aspirator.

  FIG. 3 is a side view schematically showing a configuration of a vehicle front portion provided with a conventional vehicle air conditioner. As shown in FIG. 3, the vehicle instrument panel 101 is provided with a substantially cylindrical introduction duct 102 having an opening. The introduction duct 102 is connected to a vehicle air conditioner (HVAC-UNIT) via a hose 103. ) 104 is connected to an aspirator 105 attached thereto.

  In the aspirator 105, a negative pressure is generated using the flow of air taken from the vehicle air conditioner 104, and the air (inside air) in the passenger compartment is transferred into the introduction duct 102 and the hose 103 using the negative pressure. The air is introduced into the aspirator 105 through the air passage, and the humidity is detected by the humidity sensor 106 provided in the aspirator 105 with respect to the introduced inside air (for example, (See Patent Document 1).

JP 2007-290448 A

  However, the conventional vehicle air conditioner 104 having the aspirator 105 has the following problems. That is, the inside air of the passenger compartment introduced into the aspirator 105 is exhausted into the space in front of the vehicle where the vehicle air conditioner 104 is disposed, as indicated by the white arrows in FIG. .

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle air conditioner that can efficiently use the exhaust gas of an aspirator.

  In order to achieve the above object, a first aspect of the present invention includes a motor case that houses a motor that drives a blower fan that introduces outside air, and an air conditioning chamber that air-conditions the outside air introduced from the blower fan. And a duct for guiding the air in the air conditioned room to the inside of the vehicle, and an aspirator for sucking air from the vehicle room based on the flow of air taken from the flow path formed between the air conditioned room and the duct. In the vehicle air conditioner, the air exhausted from the aspirator is introduced into the motor case.

  Further, according to another aspect of the present invention, the flow path is downstream of an evaporator disposed in the air conditioned room, and air in the air conditioned room disposed between the duct and the air conditioned room. It may be located upstream of the air mix door to be mixed.

  The present invention as described above has an effect that the exhaust gas from the aspirator can be used efficiently.

The figure which shows the structure of the vehicle air conditioner which concerns on embodiment of this invention. AA sectional view of FIG. The figure which shows the structure of the conventional vehicle air conditioner

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

  FIG. 1 is a diagram showing a configuration of a vehicle air conditioner 1 according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line AA of FIG. As shown in FIG. 1, the vehicle air conditioner 1 includes an air conditioning case 10 constituting each passage of air, a blower fan 20 disposed in the air conditioning case 10 and driven by a motor 21, and air. On the basis of the evaporator 40 for cooling, the heater core 50 for heating air, the swing doors 70a and 70b for switching the flow of air flowing through each passage in the air conditioning case 10, and the flow of air in the air conditioning case 10 And an aspirator 30 for sucking the air as a main component.

  The air conditioning case 10 is positioned downstream of the first case portion 11 along the flow of air from the first case portion 11 that houses the motor 21 and the blower fan 20, and the evaporator 40 and the heater core 50. , A vent air vent 13x for blowing air near the face of the passenger in the vehicle interior, a defroster air vent 13y for blowing air near the front window of the vehicle, and a foot for blowing air near the feet of the passenger The blower port 13z is partitioned into a third case part 13 having an opening.

  A blower fan 20 is housed in the first case portion 11 at a position that is higher in the vehicle height direction and closer to the rear in the vehicle length direction (see the arrow in the figure). The blower fan 20 extends in the direction in which the rotation axis A1 extends. Are arranged so as to be substantially parallel to the width direction of the air conditioning case 10. Further, the rotation axis A1 of the blower fan 20 is shifted downward from the center of the first case portion 11 in the vehicle height direction so that the outer periphery of the blower fan 20 is surrounded in the first case portion 11. The air passage is formed in a spiral shape and the passage cross-sectional area gradually increases, and communicates with the second case portion 12 below in the vehicle height direction.

  In the second case portion 12, the evaporator 40 is a means for generating a low-temperature flow by circulating a refrigerant therein and exchanging heat with the air introduced from the first case portion 11 to lower the temperature. The heater core 50 is a means for generating a high-temperature flow by circulating cooling water of the engine of the vehicle as hot water therein and exchanging heat with air passing through the evaporator 40 to raise the temperature. The air mix door 60 is a means for mixing the air in the second case portion 12 while adjusting the amount of air introduced into the heater core 50, located downstream of the evaporator 40 and upstream of the heater core 50. .

  Further, in the second case portion 12, an intake opening 12 x communicating with the aspirator 30 is provided on the inner wall downstream of the evaporator 40 and upstream of the air mix door 60.

  Referring to FIG. 2, aspirator 30 communicates with intake opening 12x of second case portion 12 and is connected to main body portion 30a for introducing air from second case portion 12 and main body portion 30a. An intake nozzle 30b and an exhaust nozzle 30c are provided.

  The intake nozzle 30b is a tapered nozzle whose opening cross-sectional area gradually decreases, and its tip projects from the inner wall of the main body 30a. Further, the intake nozzle 30b communicates with an intake port 32 opened in a vehicle compartment separated from the vehicle air conditioner 1 by an instrument panel (not shown). The exhaust nozzle 30c is a funnel-shaped nozzle whose opening cross-sectional area from the connection position with the main body 30a gradually increases, and exhausts intake air from the main body 30a and the intake nozzle 30b. The intake nozzle 30b and the exhaust nozzle 30c are arranged coaxially and laid out so as to be substantially orthogonal to the extending direction of the main body 30a.

  In such an aspirator 30, as shown by the dotted arrows in the figure, the flow of the air that is introduced from the exhaust opening of the second case portion 12 is exhausted from the exhaust nozzle 30c via the main body portion 30a. Will occur. At this time, a negative pressure is generated in the main body portion 30a on the exhaust nozzle 30c side, and air in the vehicle compartment is sucked to the main body portion 30a side through the intake port 32 from the intake nozzle 30b located upstream of the negative pressure.

  Next, a temperature sensor 33 is disposed in the vicinity of the air inlet 32 in the vehicle interior. The temperature sensor 33 outputs the intake air temperature to the ECU (not shown) as the temperature of the passenger compartment while intake from the aspirator 30 is performed in accordance with the operation of the vehicle air conditioner 1.

  Next, the exhaust nozzle 30 c of the aspirator 30 communicates with the first case portion 11 via the connection pipe 31. The connection pipe 31 is configured as a flow path using a member independent of a flow path of air formed in the air conditioning case 10 such as a hose, a pipe, or the like having flexibility or formability. In the first case portion 11, the exhaust opening 11 x communicating with the connection pipe 31 is disposed to face the motor 21, whereby the exhaust from the aspirator 30 forms an airflow flowing through the motor 21.

  Referring to FIG. 1 again, the second case portion 12 is formed from the boundary with the first case portion 11 toward the rear in the vehicle length direction around the outer peripheral side of the first case portion 11, and the swing door 70a. And it communicates with the 3rd case part 13 located in the vehicle height direction via 70b. The third case portion 13 further surrounds the outer peripheral side of the first case portion 11 and is formed upward in the vehicle length direction while being curved forward in the vehicle length direction.

  As a result, each passage formed by the air conditioning case 10 has a substantially spiral shape. The second case portion 12 is lower than the first case portion 11 in the vehicle height direction, and the third case portion 13 is They will be located at the rear in the vehicle length direction.

  Next, the swing doors 70a and 70b are each appropriately opened and closed, so that the air sent from the second case portion 12 is sent out of the apparatus through the vent air vent 13x, the defroster air vent 13y, and the foot air vent 13z. It is.

  Further, a temperature sensor or the like for measuring the temperature of the evaporator 40 (not shown) is provided in the air conditioning case 10, and based on information from the sensor and input from the user, the refrigerant and heater core 50 in the evaporator 40 by an ECU (not shown) in the vehicle. ON / OFF of the circulation of hot water and the opening of each of the swing doors 70a and 70b are controlled to adjust the temperature, flow rate, wind direction, etc. of the air-conditioned air blown into the vehicle.

  In the above configuration, the vehicle air conditioner 1 corresponds to the vehicle air conditioner of the present invention, the first case portion 11 of the air conditioning case 10 corresponds to the motor case of the present invention, and the second case portion 12 corresponds to the present case. The third case portion 13 corresponds to a duct according to the present invention. The aspirator 30 corresponds to the aspirator of the present invention, and the blower fan 20 and the motor 21 correspond to the blower fan and the motor of the present invention, respectively.

  Since the vehicle air conditioner 1 according to the embodiment of the present invention has the above-described configuration, exhaust from the aspirator 30 is introduced into the first case portion 11 and used as cooling air for the motor 21. This makes it possible to efficiently use the exhaust gas from the aspirator.

  Further, according to the vehicle air conditioner 1 of the present embodiment, the intake opening 12x of the second case portion 12 serving as the intake port of the aspirator 30 is positioned downstream of the evaporator 40 and upstream of the air mix door 60. Provided. As a result, relatively low-temperature air after heat exchange by the evaporator 40 can be introduced into the aspirator 30, and the cooling efficiency of the motor 21 can be increased, thereby suppressing an increase in power consumption. It becomes.

  Furthermore, according to the vehicle air conditioner 1 of the present embodiment, the connection pipe 31 for introducing the exhaust gas from the aspirator 30 to the first case portion 11 includes a hose, a pipe, and the like having flexibility or formability. By being configured as a flow path using a member independent of the air flow path formed in the air conditioning case 10, it is possible to reduce the size of the apparatus and the vehicle without newly providing a dedicated flow path in the air conditioning case 10. It is possible to facilitate the incorporation into the inside.

  Thus, according to the vehicle air conditioner 1 of the present embodiment, the exhaust gas from the aspirator can be used efficiently.

  However, the present invention is not limited to the above embodiment. In the above description, the intake opening 12x of the second case portion 12 serving as the intake port of the aspirator 30 is provided at a position downstream of the evaporator 40 and upstream of the air mix door 60. The aspirator only needs to suck air from the passenger compartment based on the flow of air taken from the flow path formed between the air conditioning chamber and the duct. Therefore, it is good also as what takes in air from the arbitrary positions from the 2nd case part 12 to the 3rd case part 13. FIG. Furthermore, although each channel | path which the air-conditioning case 10 comprises shall have a substantially spiral shape, each channel | path may be arbitrary shapes, such as linear form.

  Furthermore, in the above description, the connection pipe 31 is configured as a flow path using a member independent of the air flow path formed in the air conditioning case 10. It is good also as what is comprised as. Further, the exhaust opening 11x of the first case portion 11 is provided to face the motor 21, but may be provided to be separated from or offset from the motor 21 if the motor 21 can be cooled.

  As described above, the present invention is a vehicle air conditioner, which includes a motor case that houses a motor that drives a blower fan that introduces outside air, and an air conditioning chamber that air-conditions the outside air introduced from the blower fan. A duct for guiding the air in the air-conditioned room to the inside of the vehicle, and an aspirator for sucking air from the vehicle room based on a flow of air taken from a flow path formed between the air-conditioned room and the duct, The air exhausted from the aspirator only needs to be introduced into the motor case, and is not limited by any other specific purpose, application, or configuration.

  Therefore, the present invention may be implemented by adding various modifications to the above embodiment, including those described above, as long as they do not depart from the spirit of the present invention.

  The present invention as described above has an effect that the exhaust gas from the aspirator of the vehicle air conditioner can be efficiently used, and is useful in application to, for example, a passenger car.

DESCRIPTION OF SYMBOLS 1 Vehicle air conditioner 10 Air conditioning case 11 1st case part 11x Exhaust opening 12 2nd case part 12x Intake opening 13 3rd case part 13x Vent ventilation port 13y Defroster ventilation port 13z Foot ventilation port 20 Blower fan 21 Motor 30 Aspirator 30a Main body 30b Intake nozzle 30c Exhaust nozzle 31 Connection pipe 32 Intake port 33 Temperature sensor 40 Evaporator 50 Heater core 60 Air mix door 70a, 70b Swing door

Claims (1)

A motor case containing a motor for driving a blower fan for introducing outside air;
An air conditioning room for air conditioning the outside air introduced from the blower fan;
A duct for guiding the air in the air-conditioned room to the inside of the vehicle;
An aspirator for sucking air from the passenger compartment based on the flow of air taken from the flow path formed between the air conditioning chamber and the duct;
Air exhausted from the aspirator is introduced into the motor case.
Vehicle air conditioner.

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