JP2012201277A - Onboard air conditioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily adjust a temperature in a cabin, by adjusting quantity of hot air and quantity of cold air introduced into the cabin, while reducing noise generated by a blower fan, by miniaturizing an air-conditioning duct.SOLUTION: The blower fan 103 is arranged astride a first air-conditioning chamber 111 and a second air-conditioning chamber 112, and takes air in both of the first air-conditioning chamber 111 and the second air-conditioning chamber 112. An adjusting valve 108 is arranged on the downstream side more than an evaporator 106, and discharges the air of the second air-conditioning chamber 112 outside the cabin. A control unit 109 adjusts the temperature or quantity of the air introduced into the cabin by adjusting a discharge quantity of the air discharged outside the cabin by the adjusting valve 108 and an intake quantity of the air taken in the first air-conditioning chamber 111 and the second air-conditioning chamber 112 by the blower fan 103.

Description

  The present invention relates to an in-vehicle air conditioner suitable for an electric vehicle that runs with an electric motor.

  In an in-vehicle air conditioner mounted in an automobile or the like using an internal combustion engine as a drive source, exhaust heat from the internal combustion engine can be used as a heat source for heating. However, in the case of an electric vehicle, there is no heat source corresponding to the internal combustion engine, and a sufficient amount of heat for heating operation cannot be ensured.

  As a solution to this problem, Patent Document 1 discloses an air conditioning system that can be mounted on an electric vehicle.

  The air conditioning system described in Patent Document 1 heats outside air introduced from outside the vehicle compartment by a condenser and introduces it into the vehicle interior, cools the inside air introduced from the vehicle interior by an evaporator, collects heat, It is discharged outside. In Patent Document 1, a blower fan is individually provided in each of the two flow paths of outside air and inside air, and the amount of outside air and the amount of inside air taken into the two flow paths are individually adjusted by each blower fan, By adjusting the amount of warm air introduced from the condenser into the vehicle interior and the amount of cool air introduced from the evaporator into the vehicle interior, the temperature of the vehicle interior is adjusted.

JP 2008-290523 A

  However, the air conditioning system of Patent Document 1 has a problem that the air conditioning duct cannot be reduced in size because a blower fan is individually provided in each of two flow paths formed by partitioning with a partition plate.

  An object of the present invention is to reduce the size of an air-conditioning duct and reduce noise generated by a blower fan, and to easily adjust the temperature in the vehicle interior by adjusting the amount of warm air and cold air introduced into the vehicle interior. It is providing the vehicle-mounted air conditioner which can be performed.

  An in-vehicle air conditioner according to the present invention includes a compressor that compresses a refrigerant, a capacitor that dissipates the heat of the compressed refrigerant, an expansion unit that depressurizes the refrigerant by expanding the radiated refrigerant, and a decompression unit. An evaporator that absorbs heat from the refrigerant; and a first air-conditioning chamber that houses the condenser and forms a flow path of air that is heated by the condenser and introduced into a vehicle interior; and the evaporator A first air-conditioning chamber that is installed across the second air-conditioning chamber, the second air-conditioning chamber, and the second air-conditioning chamber that forms a flow path for air that is accommodated and cooled by the evaporator and introduced into the vehicle interior. A blower fan that takes air into both the compartment and the second air conditioning chamber, a discharge means that is provided on the downstream side of the evaporator and exhausts the air in the second air conditioning chamber to the outside of the vehicle compartment, Air to be introduced into the vehicle interior by adjusting the amount of air discharged outside the vehicle compartment by the exhaust means and the amount of air taken into the first air conditioning chamber and the second air conditioning chamber by the blower fan And a control means for adjusting the temperature or amount.

  According to the present invention, by using one blower fan and discharge means, it is possible to adjust the intake amount of air taken into the first air-conditioning chamber and the second air-conditioning chamber as in the conventional case, and a single blower fan is used. The air conditioning duct can be reduced in size. Moreover, the noise generated from the blower fan can be reduced by using one blower fan, and the temperature of the vehicle interior can be easily adjusted by adjusting the amount of warm air introduced into the vehicle interior and the amount of cold air. be able to.

The figure which shows the structure of the vehicle-mounted air conditioner which concerns on Embodiment 1 of this invention. The figure which shows the structure of the vehicle-mounted air conditioner which concerns on Embodiment 2 of this invention.

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

(Embodiment 1)
FIG. 1 is a diagram showing a configuration of an in-vehicle air conditioner 100 according to Embodiment 1 of the present invention.

  The air conditioning duct 101 is separated by a partition wall 102 into a first air conditioning chamber 111 that forms the first flow path B and a second air conditioning chamber 112 that forms the second flow path C. The first air conditioning chamber 111 forms a flow path for air that is heated by the condenser 104 and introduced into the vehicle interior. The second air conditioning chamber 112 forms a flow path for air that is cooled by the evaporator 106 and introduced into the vehicle interior.

  The blower fan 103 is provided on the air intake duct 101 side. The blower fan 103 is installed across the first air conditioning chamber 111 and the second air conditioning chamber 112. Thereby, since the blower fan 103 can be made into one, the air-conditioning duct 101 can be reduced in size and noise can be reduced compared with the conventional case where two blower fans are provided. The blower fan 103 takes a predetermined amount of air into the first air conditioning chamber 111 and the second air conditioning chamber 112 from the outside of the air conditioning duct 101. Here, the air taken in by the blower fan 103 may be any of outside air outside the passenger compartment, inside air inside the passenger compartment, or a mixture of outside air and inside air.

  The condenser 104 is provided on the downstream side of the blower fan 103 in the first air conditioning chamber 111. The condenser 104 heats the air by dissipating the heat of the refrigerant by exchanging heat between the high-temperature refrigerant supplied from the compressor 107 and the air taken into the first air-conditioning chamber 111 by the blower fan 103. The air heated by the condenser 104 is introduced into the passenger compartment. In the condenser 104, the low-temperature refrigerant that has exchanged heat with air is supplied to the expansion valve 105.

  The expansion valve 105 expands the refrigerant flowing in from the capacitor 104 and depressurizes the refrigerant. The refrigerant decompressed by the expansion valve 105 is supplied to the evaporator 106.

  The evaporator 106 is provided on the downstream side of the blower fan 103 in the second air conditioning chamber 112. The evaporator 106 heat-exchanges the low-temperature refrigerant supplied from the expansion valve 105 and the air taken into the second air-conditioning chamber 112 by the blower fan 103, thereby cooling the air by absorbing heat. In the evaporator 106, the cooled air is sent toward the passenger compartment. The evaporator 106 supplies the refrigerant that has exchanged heat with air to the compressor 107. The air introduced into the vehicle interior from the evaporator 106 is introduced into the vehicle interior as an air-fuel mixture with the air that has passed through the condenser 104.

  The compressor 107 compresses and heats the refrigerant from the evaporator 106. The heated refrigerant is supplied to the capacitor 104.

  The regulating valve 108 is provided on the downstream side of the evaporator 106 in the second air conditioning chamber 112. The regulating valve 108 discharges the air cooled by the evaporator 106 to the outside of the air conditioning duct 101 based on the control signal 10 from the control unit 109.

  That is, the control unit 109 adjusts the opening of the adjustment valve 108 via the control signal 10 to adjust the amount of air discharged from the second air conditioning chamber 112 to the outside of the air conditioning duct 101. Further, the control unit 109 controls the rotational speed of the blower fan 103 via the control signal 11 to control the amount of air taken into the first air conditioning chamber 111 and the second air conditioning chamber 112 from the outside of the air conditioning duct 101. adjust.

  The amount of air A taken in by the blower fan 103 is equal to the sum of the amount of air B flowing through the first air conditioning chamber 111 and the amount of air C flowing through the second air conditioning chamber 112. The amount of air A taken in by the blower fan 103 is equal to the sum of the air-fuel mixture G introduced into the passenger compartment and the exhaust amount of air F discharged outside the passenger compartment. The amount of air C flowing through the second air conditioning chamber 112 is equal to the sum of the amount of air E introduced from the second air conditioning chamber 112 into the passenger compartment and the amount of air F discharged outside the passenger compartment. The sum of the amount of air D introduced from the first air conditioning chamber into the vehicle interior and the amount of air E introduced from the second air conditioning chamber 112 into the vehicle interior is the amount of the air-fuel mixture G introduced into the vehicle interior. equal.

  From the above, when the amount of air A is constant, the amount of cold air E decreases as the discharge amount of cold air F increases. As a result, the cold air is reduced, so that the temperature of the air-fuel mixture G can be raised.

  Further, when the amount of air A is constant, the amount of cold air E increases as the discharge amount of cold air F decreases. As a result, the cool air increases, so that the temperature of the air-fuel mixture G can be lowered.

  In addition, when the amount of air F discharged is constant, the greater the amount of air A, the greater the sum of the amount of warm air D and the amount of cold air E, so the amount of air-fuel mixture G also increases. As a result, the air volume of the air-fuel mixture G can be increased. For example, the control unit 109 performs control to increase the amount of air A when receiving an instruction from the user to increase the air volume of the air-fuel mixture G to be sent into the passenger compartment. Thereby, in this Embodiment, the air-fuel | gaseous mixture G according to a user's instruction | indication can be sent to a vehicle interior.

  In addition, when the amount of air F discharged is constant, the smaller the amount of air A, the smaller the sum of the amount of warm air D and the amount of cold air E, so the amount of air-fuel mixture G also decreases. As a result, the air volume of the air-fuel mixture G can be reduced. For example, the control unit 109 performs control to reduce the amount of air A when receiving an instruction from the user to reduce the air volume of the air-fuel mixture G to be sent into the passenger compartment. Thereby, in this Embodiment, the air-fuel | gaseous mixture G according to a user's instruction | indication can be sent to a vehicle interior.

  As described above, according to the present embodiment, the blower fan can be adjusted by one blower fan and the discharge means while the amount of air taken into the first air-conditioning chamber and the second air-conditioning chamber can be adjusted as in the conventional case. It is possible to reduce the size of the air-conditioning duct by having one.

  Moreover, according to this Embodiment, the noise which arises from a blower fan can be reduced by having one blower fan.

  Further, according to the present embodiment, the amount of air discharged from the regulating valve and the amount of air taken in by the blower fan are adjusted, so the amount of warm air introduced into the vehicle interior and the amount of cold air are adjusted. It is possible to easily adjust the temperature in the passenger compartment.

(Embodiment 2)
FIG. 2 is a diagram showing a configuration of an in-vehicle air conditioner 200 according to Embodiment 2 of the present invention.

  The in-vehicle air conditioner 200 shown in FIG. 2 is obtained by adding a drive unit 201 and a mix door 202 to the in-vehicle air conditioner 100 according to Embodiment 1 shown in FIG. In FIG. 2, parts having the same configuration as in FIG.

  The drive unit 201 is a motor that is driven according to the control of the control unit 109, and rotates the mix door 202.

  When the drive unit 201 is driven, the mix door 202 rotates within the range of the rotation angle θ with the drive unit 201 as the rotation center. The amount of air D and the amount of air E can be adjusted by rotating the mix door 202. Therefore, in addition to the adjustment of the temperature or the air volume of the air-fuel mixture G by the adjusting valve 108 or the blower fan 103, the temperature or the air volume of the air-fuel mixture G can also be adjusted by the mix door 202.

  As described above, according to the present embodiment, in addition to the effects of the first embodiment, the temperature or the air volume of the air-fuel mixture introduced into the vehicle interior can be further finely adjusted by rotating the mix door. it can.

  The in-vehicle air conditioner according to the present invention is suitable for being provided in a vehicle such as an electric vehicle.

DESCRIPTION OF SYMBOLS 100 Car-mounted air conditioner 101 Air-conditioning duct 102 Partition wall 103 Blower fan 104 Condenser 105 Expansion valve 106 Evaporator 107 Compressor 108 Adjustment valve 109 Control part 111 1st air-conditioning room 112 2nd air-conditioning room

Claims (3)

A compressor that compresses the refrigerant; a condenser that dissipates the heat of the compressed refrigerant; an expansion unit that decompresses the refrigerant by expanding the dissipated refrigerant; and an evaporator that absorbs heat from the decompressed refrigerant And having
A first air-conditioning chamber that houses the capacitor and forms a flow path for air that is heated by the capacitor and introduced into the vehicle interior;
A second air-conditioning chamber that houses the evaporator and forms a flow path of air that is cooled by the evaporator and introduced into the vehicle interior;
A blower fan that is installed across the first air conditioning chamber and the second air conditioning chamber and takes air into both the first air conditioning chamber and the second air conditioning chamber;
A discharge means provided on the downstream side of the evaporator, for discharging the air in the second air conditioning chamber to the outside of the vehicle compartment;
The amount of air discharged outside the vehicle compartment by the discharge means and the amount of air taken into the first air conditioning chamber and the second air conditioning chamber by the blower fan are adjusted to be introduced into the vehicle interior. Control means for adjusting the temperature or amount of air;
In-vehicle air conditioner.   The in-vehicle air conditioner according to claim 1, further comprising a mix door for adjusting an introduction amount of air introduced from the first air conditioning chamber into the vehicle interior and an introduction amount of air introduced from the second air conditioning chamber into the vehicle interior. A vehicle comprising the on-vehicle air conditioner according to claim 1.

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