JP2005271625A - Vehicular air-conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular air-conditioner supplying conditioned air to a rear seat side without being largely affected by the air duct resistance, and preventing reduction of air volume to be supplied to a front seat from an air outlet for the front seat. <P>SOLUTION: An air-conditioning unit 8 which blows air supplied by a blower 9 to front seats 4, 5 and a rear seat 6 respectively from air outlets 42a, 42b formed in a front part of a cabin and a third vent air outlet 45a formed in the front part of the cabin is arranged in an instrument panel 3. A control circuit 47 to control the operational voltage of the blower 9 and control the opening/closing operation of a vent door controls so as not to reduce the supply of air blown out of air outlets 42a, 42b by correcting the increase of the operational voltage of the blower 9 to increase the number of rotation of the blower 9 when a third vent door 46 is opened, air is supplied from a third vent air outlet 45a toward the rear seat 6. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicle air conditioner provided with an auxiliary fan that blows air supplied from an air discharge port of an air conditioning unit disposed in an instrument panel again and blows it out from a rear seat side air outlet. Is.

  In general, in a vehicle air conditioner for a vehicle such as a passenger car, an air conditioning unit is provided in an instrument panel, and air conditioned by the air conditioning unit is passed through a front seat side air outlet or a rear seat side air outlet. It is normal to let them blow out. Examples of the front seat side air outlet include a side vent air outlet, a center vent air outlet, a defroster air outlet, and a front floor side air outlet.

In addition, the conventional vehicle is provided with a rear seat air duct extending from the air outlet of the air conditioning unit to the front of the rear seat along the floor, and the rear seat air duct has a rear end portion on the chest of the rear seat occupant. What provided the air blower outlet for back seats which blows off air toward is known (for example, refer patent documents 1 and 2).
JP-A-5-139148 JP 2000-233629 A

  In such a vehicle air conditioner, since the distance from the air discharge port of the air conditioning unit to the rear seat side air outlet becomes longer, the amount of air blown out from the rear seat side air outlet due to wind path resistance or the like is increased. It tends to decrease.

  Therefore, the present invention can blow air conditioned to the rear seat side without being greatly affected by such air path resistance, and is blown out from the front seat air outlet toward the front seat at this time. An object of the present invention is to provide a vehicle air conditioner that can prevent a reduction in the air volume.

  In order to achieve this object, the present invention relates to a front seat and a rear seat from a front seat air outlet provided in the front part of the passenger compartment and a rear seat air outlet provided in the front part of the passenger compartment. An air conditioning unit that blows out toward the seat is disposed in the instrument panel, and a vent door that blows and shuts off the air to the rear seat air outlet is provided, and an operating voltage of the blower And a control circuit for controlling the opening and closing of the vent door, wherein the control circuit is configured such that air is directed from the rear seat air outlet toward the rear seat when the vent door is opened. When the air is blown, the operating voltage of the blower is increased and corrected to increase the rotation speed of the blower, thereby increasing the amount of air blown from the blower and blowing from the front seat air outlet. Air blowing amount of issued and controls so as not to decrease.

  According to this configuration, the air conditioned at the rear seat side can be blown without being greatly affected by the wind path resistance, and the air volume blown from the front seat air outlet toward the front seat at this time Can be prevented from decreasing.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Constitution]
In FIG. 1, 1 is a vehicle body, 2 is a passenger compartment of the vehicle body 1, 3 is an instrument panel at the front end of the passenger compartment 2, 4 is a front seat on the driver's seat (front seat), and 5 is a passenger's seat side A front seat (front seat), 6 is a rear seat (rear seat) disposed behind the front seats 4 and 5, and 7 is a center pillar of the vehicle body 1.

  In the instrument panel 3, the air conditioning unit 8 shown in FIGS. As shown in FIG. 2, the air conditioning unit 8 includes a blower 9, a cooling unit 10, and a heater unit 11.

  The blower 9 is arranged in a blower case 12 having an outside air inlet 12a and an inside air inlet 12b, an inside / outside air switching door 13 for opening and closing the outside air inlet 12a and the inside air inlet 12b of the blower case 12, and a blower case 12. A blower fan 14 is provided, and a blower motor 15 that rotationally drives the blower fan 14 is provided. Reference numeral 16 denotes an air discharge port of the blower 9.

  The cooling unit 10 includes a cooling case 17 connected to the air discharge port 16 and an evaporator 18 disposed in the cooling case 17.

  The heater unit 11 includes a heater case 19 connected to the downstream side of the cooling case 17, a heater core 20 disposed in the heater case 19, and an air passage 21 formed between the heater core 20 and the heater case 19. And an air mix door 22 for adjusting the opening of the air passage 21 and the upstream side of the heater core 20.

  Further, the heater case 19 includes an air outlet 23 for the feet in the front seat, an air outlet 24 for the feet in the rear seat, an air outlet 25 for the upper portion of the rear seat, air outlets 26 and 26 for vents, and a differential outlet. And an air outlet 27 for third vent.

  The front seat foot air discharge port 23 can be opened and closed by a front seat foot door 28, and the rear seat foot air discharge port 24 can be opened and closed by a rear seat foot door 29. The upper air discharge port 25 is provided to be opened and closed by a rear seat upper door 30, and the vent air discharge ports 26 and 26 are provided to be opened and closed by vent doors 31, 31. The outlet 27 is provided so as to be opened and closed by a differential door 32 also serving as a third vent.

  A front seat foot air duct 33 is connected to the front seat foot air discharge port 23, and a rear seat foot air duct 34 is connected to the rear seat foot air discharge port 24. 33a is a front seat foot air outlet of the front seat foot air duct 33, and 34a is a rear seat foot air outlet of the rear end portion of the rear seat foot air duct 34.

  A first air duct 35 for the upper rear seat is connected to the air discharge port 25 for the upper rear seat. A second air duct 37 for the upper rear seat is connected to the first air duct 35 for the upper upper rear seat via a booster fan (auxiliary fan) 36, and the center pillar 7 ( A pillar air outlet 38 provided in FIG. 1 is connected. Reference numeral 36a denotes a blower fan of the booster fan 36, and 36b denotes a drive motor for driving the blower fan 36a.

  Furthermore, the air passages 40, 40 of the duct member 39 are connected to the vent air discharge ports 26, 26, and the air passage 41 of the duct member 39 is connected to the air discharge ports 27 for the differential and third vents. Yes. In addition, vent ducts 42 and 42 serving as a first vent duct and a second vent duct are connected to the air passages 40 and 40, respectively, and a branch duct 43 is connected to the air passage 41. A differential duct 44 and a third vent air duct 45 are connected to the branch duct 43.

  Each vent duct 42 is provided with a center vent air outlet (front seat air outlet) 42a and a side vent air outlet (front seat air outlet) 42b, and the differential duct 44 has a front differential air outlet. An air outlet 44 a and a side differential air outlet 44 b are provided, and an air outlet (third vent air outlet) 45 a is provided in the third vent air duct 45. These air outlets 42a, 42b, 44a, 44b, 45a are opened on the surface of the instrument panel 3 as shown in FIG.

  A connection port 43 a of the branch duct 43 to the third vent air duct 45 is provided so as to be opened and closed by a third vent door 46.

  Inside / outside air switching door 13, air mix door 22, front seat foot door 28, rear seat foot door 29, rear seat upper door 30, vent doors 31, 31 as first vent door and second vent door, differential door 32 The third vent door 46 and the like are each opened and closed by a driving means (not shown) such as a pulse motor.

  The drive motors for driving the inside / outside air switching door 13, the air mix door 22, the front seat foot door 28, the rear seat foot door 29, the rear seat upper door 30, the vent door 31, the differential door 32, etc. are shown in the figure. The operation is controlled by the control circuit 47 of FIG. 2 which receives the signal of the omitted switch.

  The control circuit 47 drives and controls the blower motor 15 of the blower (Fr FAN machine) 9 and the drive motor 36b of the booster fan (booster FAN) 36.

Further, the control circuit 47 includes an air volume changeover switch 48 for changing the air volume by varying the rotational speed of the blower 9 or the blower motor 15 in seven stages, and the booster fan 36 or the drive motor 36b. An air volume changeover switch 49 for switching the air volume by switching between high speed rotation (Hi) and low speed rotation (Lo) when the switch is ON is connected. The control circuit 47 is connected to a door opening / closing switch 50 for opening / closing the third vent door 46.
[Action]
Hereinafter, the control action by the control circuit 47 of the vehicle air conditioner having such a configuration will be described.

  When the air volume changeover switch 48 is turned on, the control circuit 47 rotates the blower motor 15 to rotate the blower fan 14 and sucks air into the blower fan 14.

  At this time, when the outside air inlet 12a is opened and the inside air inlet 12b is closed as shown in FIG. 2, fresh outside air is sucked into the blower fan 14 from the outside air inlet 12a. The sucked air is discharged from the air discharge port 16. 2 is closed by the inside / outside air switching door 13 and the inside air inlet 12b is opened, the air in the passenger compartment 2 is sucked into the blower fan 14 and sucked in. Air is discharged from the air discharge port 16.

  The air discharged from the air discharge port 16 passes through the evaporator 18 of the cooling unit 10 and flows into the heater case 19 of the heater unit 11. At this time, when the cooling unit 10 is operated, the air passing through the evaporator 18 is cooled.

  On the other hand, in the heater unit 11, when the air mix door 22 is in a solid line position, all of the air that has flowed into the heater case 19 from the cooling unit 10 flows to the downstream side of the heater core 20 via the air passage 21.

  Further, when the air mix door 22 is controlled to rotate up and down as indicated by the broken line from the position of the solid line, and the upstream side of the heater core 20 is opened and the air passage 21 is opened, the cooling unit 10 Part of the air that has flowed into the heater case 19 passes through the heater core 20 and flows downstream. At this time, air passing through the heater core 20 is heated by the heater core 20. Moreover, the remaining air flows downstream of the heater core 20 through the air passage 21 and is mixed with the air that has passed through the heater core 20.

  Further, when the air passage 21 is closed by the air mix door 22, all of the air that flows into the heater case 19 from the cooling unit 10 passes through the heater core 20. At this time, all the air is heated by the heater core 20.

  The opening degree of the air mix door 22 with respect to the heater core 20 and the operation control of the cooling unit 10 are executed by the control circuit 47 in accordance with a set temperature by a temperature setting switch (not shown) or the like, and air conditioning is performed downstream of the heater core 20. (Temperature adjusted) air is produced. Since a well-known configuration can be adopted for such control, description thereof is omitted.

  When the front seat foot door 28 is opened, the conditioned air downstream of the heater core 20 is blown out from the air outlets 33a and 33a to the feet of the passengers in the front seats (front seats) 4 and 5. Further, when the rear seat foot door 29 is opened, the air-conditioned air downstream of the heater core 20 is blown out from the air outlets 34a, 34a to the feet of the passengers of the rear finisher (rear seat) 6.

  Further, when the vent door 31 is opened, the air-conditioned air downstream of the heater core 20 is blown out from the center vent air outlet 42a and the side vent air outlet 42b toward the occupants of the front seats 4 and 5. . Further, when the differential door 32 is opened, the conditioned air downstream of the heater core 20 is blown out from the front differential air outlet 44a and the side vent air outlet 42b.

  Open / close control of the front seat foot door 28, the rear seat foot door 29, the vent door 31, the differential door 32, and the like is executed by the control circuit 47. The open / close control can be variously performed by auto, manual, or mode switching. For this open / close control, a well-known method can be adopted.

  Further, when the air volume changeover switch 49 is turned on, the control circuit 47 rotates the drive motor 36b of the booster fan 36 to rotate the blower fan 36a, and the conditioned air downstream of the heater core 20 is supplied to the first air duct. The air is sucked into the blower fan 36 a through the air 35. The sucked air is blown out from the pillar air outlet 38 toward the rear seat 6 through the second duct 37 and the center pillar 7.

  Next, in the manual mode in which the air volume of the blower 9 is manually switched by the air volume changeover switch 48, the air is blown out from the third vent air outlet 45a toward the front seats 4 and 5, and the blown air is directed to the rear seat 6 side. The operation when the air is blown will be described with reference to the flowchart of FIG. 4 and FIGS.

When the air volume changeover switch 48 is turned on and the control circuit 47 enters the manual mode, the control circuit 47 starts controlling the air flow rate of the blower 9 according to the flowchart of FIG.
Step S1
In step S1, the control circuit 47 causes the air flow rate changeover switch 48 to change the operating voltage of the blower motor 15 to one of manual operation stages M (in this embodiment, Fr FAN speeds 1 to 7 shown in FIGS. 5 and 6). When operated, the process proceeds to step S2.

  Here, FIG. 5 shows each of the modes (VENT corresponding to 1 to 7 of the Fr FAN speed) corresponding to the manual operation stage number M of the rotational speed of the blower motor 15, that is, in this embodiment, 1 to 7 of the Fr FAN speed. , B / L 1, B / L 2, FOOT, D / F 1, D / F 2, DFF, etc.), the basic operating voltage of the blower motor (Fr FAN machine) 15 is shown.

  For example, when the manual operation stage number M of the rotational speed of the blower motor 15, that is, the Fr FAN speed is 1 speed (1 stage), the operating voltage of the blower motor 15 is “3.75 (V) in the“ VENT ”mode, for example. The operating voltage of “B / L1” is “3.75 (V)”, and the operating voltage of “B / L2” is “3.75 (V)”.

  Further, when the manual operation stage number M of the rotational speed of the blower motor 15, that is, the Fr FAN speed is the second speed (two stages), the operating voltage of the blower motor 15 is “4.75 (V) in the“ VENT ”mode, for example. The operating voltage of “B / L1” is “4.75 (V)”, and the operating voltage of “B / L2” is “4.75 (V)”. Similarly, the operating voltage of the blower motor 15 is set in accordance with the table of FIG. 5 when the Fr FAN speed is the third speed (third stage) or later.

Further, FIG. 6 shows each mode (VENT corresponding to 1 to 7 of the Fr FAN speed) corresponding to the manual operation stage number M of the rotation speed of the blower motor 15, that is, in this embodiment, 1 to 7 of the Fr FAN speed. The basic operating voltage of the blower motor (Fr FAN machine) 15 in the modes (B / L1, B / L2, etc.) is shown. In this case as well, the operating voltage of the blower motor 15 is set in accordance with the table of FIG.
Step S2
In step S2, the control circuit 47 determines whether the third vent door 46 is open or closed. If it is closed, the process proceeds to step S3 with YES, and if it is open, the process proceeds to step S4 with NO.
Step S3
In step S3, the control circuit 47 sets the basic operating voltage of the blower motor (Fr FAN machine) 15 according to the table shown in FIG. 5, sets the correction voltage ε, and proceeds to step S5.
Step S4
In step S4, the control circuit 47 sets the basic operating voltage of the blower motor (Fr FAN machine) 15 with the basic operating voltage shown in the table shown in FIG. The process proceeds to S5.
Step S5
In step S3, since the third vent door 46 is closed, air is blown out from other air outlets (for example, air outlets 33a, 34a, 34a, 42a, 42b, 44a, 44b, etc.) other than the third vent air outlet 45a. Since there is no effect on the air volume of the generated air, each mode (modes such as VENT, B / L1, B / L2, FOOT, D / F1, D / F2, and DFF corresponding to Fr FAN speeds 1 to 7) It is not necessary to correct the correction voltage ε. As a result, the correction voltage ε in each mode (VENT, B / L1, B / L2, FOOT, D / F1, D / F2, DFF, etc. modes corresponding to Fr FAN speeds 1 to 7) is shown in FIG. “0 (V)” of “SHUT”.

  Therefore, when the control circuit 47 shifts from step 3 to this step, the operating voltage of the blower motor (Fr FAN machine) 15 is VENT corresponding to each mode (Fr FAN speed 1 to 7) of the table shown in FIG. The blower motor (Fr FAN machine) 15 is controlled to operate at a basic operating voltage in the B / L1, B / L2, FOOT, D / F1, D / F2, and DFF modes.

  In step S4, since the third vent door 46 is opened, air-conditioned air is blown out from the third vent air outlet 45a toward the front seats 4 and 5, and the blown-out air is directed to the rear seat 6 side. Be blown. For this reason, the air volume of the air blown out from other air outlets (for example, air outlets 33a, 34a, 34a, 42a, 42b, 44a, 44b, etc.) other than the third vent air outlet 45a is reduced (decreased). Therefore, particularly when the air volume blown from the air outlets 33a, 42a, 42b, etc. is smaller than the set air volume, the passengers of the front seats 4, 5 are given a sense of incongruity. Therefore, in order to compensate for the decrease, the operating voltage of the blower motor 15 is corrected to the basic operating voltage of each mode (modes such as VENT, B / L1, B / L2, etc. corresponding to Fr FAN speeds 1 to 7). It is necessary to add ε. For example, the correction voltage is set to “2.0 (V)” of “OPEN” in FIG.

Accordingly, in step S5, the control circuit 47 corrects the operating voltage of the blower motor (Fr FAN machine) 15 when the process proceeds from step S4 to this step. That is, the control circuit 47 sets the basic operation voltage in each mode of the table shown in FIG. 6 (the VENT, B / L1, B / L2, etc. modes corresponding to Fr FAN speeds 1 to 7) in step S4. A value obtained by adding “2.0 (V)” of “OPEN” preset in FIG. 7 as the correction voltage ε is set as the operating voltage of the blower motor (Fr FAN machine) 15.
Step S6
And after setting the operating voltage of the blower motor 15 in this way, the control circuit 47 starts control operation of the blower motor 15 by step S6 based on this set operating voltage, and transfers to step S7.
Step S7
In step S7, it is determined whether or not a mode other than manual operation is changed. If there is no change, the process returns to step S1 and loops. If there is a change, the process proceeds to the changed mode.

  In this way, the arithmetic control circuit 47 controls the blower motor 15 to drive at the basic operating voltage when the third vent door 46 is closed, and adjusts the blower motor 15 to the basic operating voltage when the third vent door 46 is opened. , 2.0V), the VENT, B / L1, B / L2 corresponding to each mode (Fr FAN speed 1 to 7) when the third vent door 46 is opened. Etc.) can be prevented from decreasing (decreasing) in the air flow rate of the blower 9.

  As described above, in the vehicle air conditioner according to the embodiment of the present invention, the front seat air outlet (center vent air outlet 42a, side) provided with air blown by the blower 9 in the front part of the passenger compartment is provided. Bent air outlet 42b) and rear seat air outlet (third vent air outlet 45a) provided in the front part of the passenger compartment are blown out toward the front seat (front seats 4, 5) and rear seat (rear seat 6). An air conditioning unit 8 is provided in the instrument panel 3, and a vent door (third vent door 46) is provided to blow and block the air to the rear seat air outlet (third vent air outlet 45a). It has been. Further, the vehicle air conditioner includes a control circuit 47 that controls the operating voltage of the blower and controls the opening and closing of the vent door. Moreover, in the control circuit 47, the vent door (third vent door 46) is opened and air is blown from the rear seat air outlet (third vent air outlet 45a) toward the rear seat (rear seat 6). Sometimes, by increasing the operating voltage of the blower 9 and increasing the rotational speed of the blower 9, the amount of air blown from the blower 9 is increased, and the front seat air outlet (center Control is performed so that the amount of air blown from the vent air outlet 42a and the side vent air outlet 42b) does not decrease.

  According to this configuration, air conditioned to the rear seat (rear seat 6) can be blown without being greatly affected by the wind path resistance, and at this time, the front seat air outlet (center vent air outlet 42a, It is possible to prevent a reduction in the amount of air blown out from the side vent air outlet 42b) toward the front seats (front seats 4, 5).

It is a schematic explanatory drawing of a vehicle provided with the air conditioner which concerns on this invention. It is explanatory drawing of the air conditioner which concerns on this invention. 1 is an exploded perspective view schematically showing an air conditioner according to the present invention. It is a flowchart explaining the effect | action of the air conditioning apparatus of FIG. It is explanatory drawing which shows the basic operating voltage of the blower motor used for the flowchart of FIG. It is explanatory drawing which shows the basic operating voltage of the blower motor used for the flowchart of FIG. It is explanatory drawing which shows the correction voltage of the blower motor used for the flowchart of FIG.

Explanation of symbols

2 ... Car compartment 3 ... Instrument panels 4, 5 ... Front seat (front seat)
6 ... Rear seat (rear seat)
9. Blower 42a ... Center vent air outlet (front air outlet)
42b ... Side vent air outlet (front air outlet)
45a ... Third vent air outlet 46 ... Third vent door (vent door)
47. Control circuit

Claims (1)

An air conditioning unit that blows air blown by the blower from the front seat air outlet provided in the front part of the passenger compartment and the rear seat air outlet provided in the front part of the passenger compartment toward the front seat and the rear seat, respectively. A vent door that is disposed in the ment panel and that blows and shuts off the air to the rear seat air outlet, and controls the operating voltage of the blower and controls the opening and closing of the vent door. A vehicle air conditioner provided with a circuit,
The control circuit increases the operating voltage of the blower to increase the rotational speed of the blower when the vent door is opened and air is blown from the rear seat air outlet toward the rear seat. Thus, the vehicle air conditioner is controlled such that the amount of air blown from the blower is increased so that the amount of air blown from the front seat air outlet does not decrease.

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