JP2006240548A - Air conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner for a vehicle capable of making an air stream of air-conditioned air approaching to the state of natural wind and preventing interference of air-conditioned air at a driver's seat side and a front passenger seat. <P>SOLUTION: The air conditioner for the vehicle is provided with an air direction adjustment means 18 provided on a vent blowing port 10 at a front part of a cabin 1 and adjusting the direction of the air-conditioned air such that it varies in a vertical direction; and a control part 23 for controlling a rotation speed of a blower 4. Thereby, since the speed of air from the blower 4 varies in a short period and a long period and the direction of the air-conditioned air varies in an intermediate period, the air stream of the air-conditioned air can be complicatedly varied by a combination of variation of the air speed and the air direction of the air-conditioned air fed to the cabin 1. Further, it is not required that the direction of the air-conditioned air is varied in a left/right direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicle air conditioner that supplies conditioned air at a predetermined temperature into a passenger compartment.

As related to this type of prior art, for example, as described in Patent Document 1, an “automotive vehicle” including a substantially half-divided cylindrical rotary valve that changes the blowing area of the conditioned air in the vehicle width direction. An “air conditioner” has been proposed. In this prior art, by changing the air-conditioning wind blowing area in the vehicle width direction, a difference in the amount of blown air flow depending on the position of blowing into the vehicle interior is caused, and if necessary, the air flow into the vehicle interior in the vehicle width direction. It is possible to switch between uniform cooling that blows out uniformly and spot cooling that blows out a large amount of conditioned air locally.
Japanese Utility Model Publication No. 62-29869 (pages 1 and 2, FIG. 2) Also, as described in Patent Document 2, a "vehicle air conditioner" provided with fins that rotate in the left-right direction has been proposed. ing. In this prior art, the airflow of the conditioned air is oscillated by periodically changing the airflow direction of the conditioned air in the left-right direction by the rotation of the fins, and so-called “fluctuating air” is supplied into the vehicle interior. be able to. JP, 11-310034, A (paragraph numbers 0012 and 0013, FIG. 2) Further, as described in Patent Document 3, the first wind direction adjusting means rotating in the vertical direction and a direction different from the vertical direction A “vehicle airflow direction adjusting device” having a second wind direction adjusting means that rotates in the air has been proposed. In this prior art, the first wind direction adjusting means periodically changes the direction of the conditioned air in the vertical direction, and the second wind direction adjusting means periodically changes the direction of the conditioned air in another direction. By doing so, the airflow of the conditioned air blown into the vehicle interior can be swung in the vertical direction and other directions, and the fluctuation air can be supplied into the vehicle interior. JP, 9-52518, A (paragraph numbers 0010-0015, Drawing 1) Moreover, as indicated in patent documents 4, it has a horizontal louver which rotates up and down, and a vertical louver which rotates in the left and right direction “Vehicle air conditioners” have been proposed. In this prior art, by rotating the horizontal louver, the direction of the conditioned air is periodically changed in the vertical direction, and by rotating the vertical louver, the direction of the conditioned air is periodically changed in the left-right direction. The airflow of the conditioned air blown into the vehicle interior can be swung in the vertical and horizontal directions to supply the fluctuation air to the vehicle interior. JP 2004-90853 A (paragraph numbers 0026 to 0028, FIG. 3)

  However, in the prior art described in Patent Document 1, there is a difference in the amount of air blown depending on the position where the air is blown into the passenger compartment, and uniform cooling that blows uniformly into the passenger compartment and a large amount of locally conditioned air are blown. However, the air-conditioning air blowing speed is constant, and the air-conditioning airflow that reaches the passengers in the passenger compartment is monotonous, unlike the case where the airflow changes randomly like natural air. Therefore, there has been a demand for bringing the airflow of the air-conditioning wind close to a natural wind.

  Moreover, in the prior art described in Patent Document 2, the airflow of the conditioned air can be swung by periodically changing the direction of the conditioned air blown into the passenger compartment in the left-right direction. Since the air blowing speed is constant, the airflow of the conditioned air to the passengers in the passenger compartment is monotonous. In particular, when cooling is performed for a long time, it is difficult to obtain passengers' satisfaction. Furthermore, by periodically changing the direction of the conditioned air flow in the left and right directions on the driver seat side and the passenger seat side in the passenger compartment, these air conditioned air currents interfere with each other, and the driver seat side and the passenger seat There is also a problem that the effect of independent temperature control is impaired when the temperature is adjusted separately on the side.

  Moreover, in the prior art described in Patent Document 3 and the air-conditioning wind blown into the vehicle interior can be swung up and down, left and right, but the air-conditioning wind blowing speed is still constant. As in the prior art described in Patent Document 2, the air-conditioning airflow is monotonous and when the airflow direction of the air-conditioning air is periodically changed in the left-right direction on the driver seat side and the passenger seat side, There has been a problem that the airflows of these conditioned airs interfere with each other. Note that the conventional technique described in Patent Document 4 has the same problem.

  The present invention has been made in consideration of the above-described conventional technology, and its purpose is to make the airflow of the conditioned air supplied to the passenger compartment closer to a state that changes randomly like natural wind. Another object of the present invention is to provide a vehicle air conditioner capable of preventing the airflows of the conditioned air on the driver seat side and the passenger seat side in the passenger compartment from interfering with each other.

  In order to achieve the above object, the present invention provides a blower that takes in outside air and inside air and blows air, a blower passage connected to the blower, and heat that is provided in the middle of the blower passage and performs heat exchange of passing air. An air conditioner for a vehicle comprising an exchanger and a plurality of outlets for blowing air from the air passage into the vehicle interior, provided at a vent outlet at the front of the vehicle interior, and the direction of the conditioned air Is configured to include a wind direction adjusting unit that adjusts so as to change in the vertical direction, and a speed control unit that controls the rotational speed of the blower.

  In the present invention configured as described above, the rotational speed of the blower is controlled by the speed control means, and the wind direction of the conditioned air is adjusted by the wind direction adjusting means provided at the vent outlet at the front of the passenger compartment. The air speed and direction of the conditioned air blown from the vent outlet are changed. Thereby, since the airflow of the conditioned air can be changed in a complex manner by combining changes in the wind speed and direction of the conditioned air, the airflow of the conditioned air can be brought close to a state that changes randomly like natural wind. In addition, since the direction of the conditioned air is changed in the vertical direction but not in the left and right direction, it is possible to prevent the airflows of the conditioned air from the driver seat side and the passenger seat side in the passenger compartment from interfering with each other.

  In the present invention, the airflow of the conditioned air supplied to the passenger compartment can be brought close to a state that changes randomly like natural wind, and the airflow of the conditioned air on the driver seat side and the passenger seat side interferes with each other. Can be prevented. Therefore, independent temperature control of the driver's seat side and the passenger's seat side in the passenger compartment can be performed effectively, and a comfortable air-conditioning environment in the passenger compartment can be maintained and passenger comfort can be obtained. There is an effect that can improve the comfort of.

  Hereinafter, details of a vehicle air conditioner according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a sectional view showing a vehicle air conditioner according to an embodiment of the present invention, FIG. 2 is a characteristic diagram showing an operation of a mild flow door provided in the embodiment, and FIG. 3 is a blower provided in the embodiment. 4 is a characteristic diagram of a voltage applied in a long cycle, FIG. 4 is a characteristic diagram of a voltage applied in a short cycle to a blower provided in the present embodiment, and FIG. FIG.

  In the front part of the vehicle compartment 1 shown in FIG. 1, an instrument panel 2 for accommodating a not-shown instrument, audio equipment, and the like is disposed.

  And the vehicle air conditioner 3 of this embodiment is accommodated in said instrument panel 2, the blower 4 which takes in external air and internal air, and blows air, The ventilation path 5 connected to this blower 4, and The cooling evaporator 6 is provided in the middle of the air passage 5 and exchanges heat of the air in the air passage 5 through a refrigerant circulating in an external refrigerant circuit (not shown), and is disposed downstream of the evaporator 6. The heater core 7 for heating that uses engine coolant as a heat source, an airmic door 8 that is provided between the evaporator 6 and the heater core 7 and adjusts the ratio of the air volume that passes through the heater core 7 and the air volume that bypasses, and the air passage 5 A plurality of outlets 9, 10, and 11 for blowing air from the vehicle interior 1 to the passenger compartment 1. These outlets 9, 10, and 11 are disposed at the outlets of the outlet passages 12, 13, and 14 connected to the air passage 5, and open / close doors 15, 16, and 17 are provided at the respective inlets. . The foot outlet 9 blows conditioned air from the lower part of the instrument panel 2 toward the feet of the passengers in the passenger compartment 1, and the vent outlet 10 emits conditioned air from the middle part of the instrument panel 2 into the passenger compartment 1. The blowout and defroster blowout port 11 blows air conditioned air upward from the upper part of the instrument panel 2. The vent outlet 10 is provided with a wind direction adjusting means 18 for adjusting the air direction of the conditioned air so as to change in the vertical direction. The wind direction adjusting means 18 is arranged in the vertical direction between a downward lower position and an upward upper position. A mild flow door, for example, a fin 19 and a fin driving body 20 for driving the fin 19 are configured.

  As shown in FIG. 3, the control system 21 provided in the present embodiment includes an air conditioner operation unit 22 and a control unit 23 including a CPU and the like. The control unit 23 inputs operation signals from the air conditioner operation unit 22 and detection signals from various sensors 24, and the blower 4, the airmic door 8, the open / close doors 15 to 17, and the fins according to these input signals. A control command is output to the driver 20 or the like. The control unit 23 constitutes speed control means for controlling the rotational speed of the blower 4, that is, the wind speed from the blower 4.

  In this embodiment, the control unit 23 controls the fins 19 and the blower 4 as follows in accordance with an air conditioner operation signal input to the air conditioner operation unit 22. That is, as shown in FIG. 2, the fin 19 provided in the vent outlet 10 at the front of the passenger compartment 1 rotates upward from the lower position of the lower position for 12 seconds from time t0 to time t1, and then upwards. It stops at the upper position for 2 seconds, rotates for 6 seconds downward from the upward upper position at time t2, and starts to rotate upward again from the downward lower position at time t3. Next, the same operation is repeated at a cycle of 20 seconds. As a result, the direction of the conditioned air blown from the vent outlet 10 changes in the vertical direction at a cycle of 20 seconds.

  Further, as shown in FIG. 3, the voltage applied to the blower 4 is changed with a SIN waveform pattern over a period of 80 seconds from time t4 to time t5, and the same voltage change is repeated at a period of 80 seconds. At the same time, as shown in FIG. 4, the voltage applied to the blower 4 is changed in a SIN waveform pattern over a period of 6 to 10 seconds from time t6 to time t7, and the same voltage change is repeated at a period of 6 to 10 seconds. As a result, the wind speed from the blower 4 increases and decreases with a long period of 80 seconds and with a short period of 6 to 10 seconds.

  Next, when the air is blown from the blower 4 through the air passage 5 and the conditioned air is blown from the vent outlet 10 to the passenger compartment 1, the combination of the change in the air velocity and the direction of the air conditioned air, as shown in FIG. In addition, the wind speed (average) of the conditioned air that reaches the passengers in the passenger compartment 1 changes in a complicated manner.

  In the present embodiment configured as described above, when the conditioned air is blown from the vent outlet 10 at the front portion of the passenger compartment 1, the air speed of the conditioned air reaching the occupant can be changed in a complicated manner. It can approach a state that changes randomly like natural wind. In addition, since the direction of the conditioned air is changed in the vertical direction but not in the left and right direction, it is possible to prevent the airflows of the conditioned air in the driver's seat side and the passenger seat side in the passenger compartment 1 from interfering with each other.

  According to the outdoor wind speed measurement survey and the vehicle interior wind speed survey conducted by the present applicant, the following evaluations were obtained. That is, (1) The favorable evaluation of the wind speed felt by the passengers in the passenger compartment 1 was obtained mainly by the combination of a long period of about 80 seconds, an intermediate period of 20 seconds, and a short period of 10 seconds or less. It was to change the airflow of the conditioned air. In addition, (2) when the actual vehicle was confirmed to change the wind direction of the conditioned air in the vertical direction, a good evaluation was obtained. However, in this case, there is a problem that the wind speed change pattern is monotonous. In addition, (3) by changing the rotational speed of the blower 4 by controlling the voltage applied to the blower 4 in the reproduction of the outdoor wind speed, the wind speed change could be reproduced in a pattern close to the state of natural wind. However, in this case, since the wind direction does not change, there is a problem that the conditioned air always hits the passenger. Therefore, in consideration of the evaluation by the outdoor wind speed measurement survey and the vehicle interior wind sensation survey described above, in this embodiment, by combining the change in the wind speed and direction of the conditioned air, the air flow of the conditioned air is changed as shown in FIG. It is designed to change complicatedly.

  The present invention can effectively perform independent temperature control between the driver's seat side and the passenger seat side in the passenger compartment, and can maintain a comfortable air conditioning environment in the passenger compartment and obtain passengers' satisfaction. Therefore, it can be applied as an air conditioner for vehicles, and can also be widely applied as an air conditioner for general machines or industrial machines.

It is sectional drawing which shows the vehicle air conditioner which concerns on one Embodiment of this invention. It is a characteristic view which shows operation | movement of the mild flow door provided in this embodiment. It is a characteristic view of the voltage applied to a blower provided in this embodiment in a long cycle. It is a characteristic view of the voltage applied to a blower provided in this embodiment in a short cycle. It is a characteristic view which shows transition of the wind speed of the air-conditioning wind supplied by this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car compartment 2 Instrument panel 3 Vehicle air conditioner 4 Blower 5 Air passage 6 Evaporator (heat exchanger)
7 Heater core (heat exchanger)
9 Foot outlet 10 Vent outlet 11 Defroster outlet 18 Wind direction adjusting means 19 Fin (mild flow door)
20 Fin Driver 22 Air Conditioner Operation Unit 23 Control Unit (Speed Control Unit)

Claims (4)

A blower (4) that takes in outside air and inside air and blows air, a blower passage (5) connected to the blower (4), and a heat exchange of air passing through the blower passage (5). A vehicle air conditioner including a heat exchanger (6, 7) to be performed and a plurality of outlets (9, 10, 11) for blowing air from the air passage (5) into the passenger compartment (1) ( 3)
Wind direction adjusting means (18) provided at the vent outlet (10) at the front of the vehicle compartment (1) for adjusting the air direction of the conditioned air to change in the vertical direction, and the rotational speed of the blower (4) Vehicular air conditioner (3), characterized by comprising speed control means (23) for controlling   The vehicle air conditioner (3) according to claim 1, wherein the wind direction adjusting means (18) is a mild flow door (19) that periodically rotates between an upward upper position and a downward lower position. A vehicle air conditioner (3).   The vehicle air conditioner (3) according to claim 1, wherein the voltage applied to the blower (4) is periodically changed by the control of the speed control means (23). Vehicle air conditioner (3). 2. The vehicle air conditioner (3) according to claim 1, wherein the wind direction adjusting means (18) changes the air direction of the conditioned air in an intermediate period, and the speed control means (23) controls the wind speed of the conditioned air. A vehicle air conditioner (3) characterized by being changed in a short cycle and a long cycle.

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