JP4483730B2 - Air conditioner for vehicles - Google Patents

Description

  The present invention relates to an air conditioner for a vehicle having an opening / closing device that opens and closes a ventilation opening by a membrane member.

  As a prior art, there is a vehicle air conditioner disclosed in Patent Document 1 below. In this vehicle air conditioner, both ends of the film damper, which is a film-like member that opens and closes the air vent, are fixed to the take-up shaft, and each take-up shaft is rotationally driven by each DC servo motor that is a drive means. It is like that.

The air conditioner control device that controls the DC servo motor makes the voltage applied to the DC servo motor smaller when driving the film damper when the air blowing is stopped than when the air blowing is performed. Thus, the operation speed of the film damper is reduced. As a result, frictional noise generated when the film damper is driven is reduced.
JP-A-5-213047

  In recent years, there has been an increasing need for quietness in the vehicle interior, and even in a vehicle air conditioner, it is desired to further reduce the frictional noise generated when the film damper is driven.

  Therefore, the present inventor does not lower the voltage as a method of reducing the operating speed, but intensively examines whether a similar result can be obtained by another method, and operates in a pseudo manner by intermittent driving. We found that the speed could be reduced.

  This invention is made | formed in view of the said point, and it aims at providing the vehicle air conditioner which can further reduce the friction sound which arises when a film-like member is driven.

In order to achieve the above object, in the invention described in claim 1,
A vehicle air conditioner having a duct (2) that guides blown air into the passenger compartment and an open / close device (200) that opens and closes the vent holes (6, 7, 8) of the blown air provided in the duct (2). There,
The switchgear (200)
Two winding shafts (13, 14) supported rotatably;
Both end portions are fixed to the respective winding shafts (13, 14) and are arranged along the ventilation openings (6, 7, 8), and match the ventilation openings (6, 7, 8). , 7, 8) a film-like member (15) having an opening for opening,
Drive means (16) for rotationally driving the take-up shafts (13, 14);
Control means (19) for controlling the operation of the drive means (16),
The control means (19) operates the drive means (16) intermittently when the opening degree of the ventilation openings (6, 7, 8) is changed from the change start opening degree (A) to the final target opening degree (B). It is what
When the control means (19) changes the opening degree of the ventilation openings (6, 7, 8) from the opening degree opening position (A) to the final target opening degree (B), the opening degree opening position change (A) A plurality of intermediate target openings (C1 to C6) are set between the final target opening degree (B) and the final target opening degree (B), and sequentially updated. Based on the intermediate target opening degrees (C1 to C6) to be sequentially updated, the driving means (19 ) Is repeatedly actuated, and then the drive means (16) is reactivated based on the final target opening degree (B) to intermittently operate the drive means (16) .

  According to this, when the driving means (16) is intermittently operated, the film-like member (15) is intermittently moved when the change start opening (A) position to the final target opening (B) position. To drive. That is, the film-like member (15) can move from the opening position (A) at the change start to the final target opening position (B) by repeating the operation of stopping immediately after the start of driving.

  Therefore, since the state immediately after the start of driving with relatively low frictional noise is repeated, the frictional noise generated when the film-like member (15) is driven can be further reduced.

Moreover, the drive means (16) can be intermittently operated only by setting the intermediate target opening (C1 to C6), and the control of the drive means (16) is extremely simple.

Further, even when the change start opening degree (A) and the final target opening degree (B) are largely separated, the driving means (16) is easily intermittently operated to drive the membrane member (15). It is possible to reduce the frictional noise generated at the time.

Further, the invention according to claim 2 is characterized in that the control means (19) sets the intermediate target opening (C1 to C6) for each predetermined opening from the change start opening (A). .

  According to this, setting of the intermediate target opening (C1 to C6) is extremely easy.

Further, in the invention described in claim 3 , it is provided with an operation means (20) for manually inputting an air conditioning condition in the passenger compartment, and the control means (19) is an intermediate target when the operation means (20) is manually operated. The setting of the opening degree (C1 to C6) is stopped.

  According to this, when the user manually operates the operation means (20) and desires to change the conditions, the drive means (16) is continuously operated to promptly drive the membrane member (15) to achieve the final target. The opening (B) can be reached, and the user can be prevented from feeling uncomfortable.

In the invention according to claim 4, when the maximum cooling state for rapidly cooling the vehicle interior or the maximum heating state for rapid heating is set, the control means (19) sets the intermediate target opening (C1 to C6). ) Setting is canceled.

  According to this, in order to quickly cool or heat the passenger compartment to bring the passenger compartment to a comfortable temperature, the driving means (16) is continuously operated to promptly drive the membrane member (15). The final target opening (B) can be reached, and the user can be prevented from feeling uncomfortable.

  In addition, the code | symbol in the parenthesis attached | subjected to each said means is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

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

  FIG. 1 is a cross-sectional view of a vehicle air conditioner, and FIG. 2 is a perspective view of an opening / closing device. A vehicle air conditioner 1 according to this embodiment includes a unit case 2 (corresponding to a duct of the present invention) that guides blown air into a vehicle interior, a blower 3 that generates an air flow in the unit case 2, and the unit case 2. The refrigerant evaporator 4 of the arranged refrigeration cycle, the heater core 5 using the engine coolant as a heat source, and the like are configured.

  At the downstream end of the unit case 2, a defroster (DEF) outlet 6, a vent (VENT) outlet 7, and a foot (FOOT) outlet 8 are provided for blowing the blown air into the passenger compartment.

  The temperature control of the blown air flowing in the unit case 2 and the switching of the air outlets 6 to 8 (corresponding to the air vent of the present invention) are performed by the temperature adjusting means 100 and the air outlet switching means to which the switchgear of the present invention is applied. 200.

  The temperature adjusting means 100 adjusts the amount of air blown to the heater core 5. The temperature adjusting means 100 has two winding shafts 9 and 10 that are rotatably supported on the side wall of the unit case 2. 10 includes a flexible film damper 11 (corresponding to a film-like member of the present invention) fixed to 10 and a DC servo motor 12 (corresponding to driving means of the present invention) for rotating the winding shaft 9.

  The film damper 11 has an opening (not shown) for allowing the air to pass through. When the winding shaft 9 is driven to rotate by the DC servo motor 12, the film damper 11 slides between the winding shafts 9 and 10. The amount of air blown to the heater core 5 is adjusted by the displacement of the opening.

  The outlet switching means (blowing mode switching means) 200 has two winding shafts 13 and 14 that are rotatably supported on the side wall of the unit case 2, and both ends are fixed to the winding shafts 13 and 14, respectively. A flexible film damper 15 (corresponding to the film-like member of the present invention), a DC servo motor 16 (corresponding to driving means of the present invention) for rotating the take-up shaft 13, and two films for supporting the film damper 15 It consists of intermediate shafts 17 and 18.

  The film damper 15 has an opening (not shown) for allowing the blown air to pass through. When the winding shaft 13 is rotationally driven by the DC servo motor 16, the winding shaft 13 is interposed via the intermediate shafts 17 and 18. , 14 is displaced, the position of the opening is displaced, and the air outlets 6 to 8 are selectively opened.

  In addition, in the unit case 2 which forms each blower outlet 6-8, in order to receive the wind pressure at the time of ventilation and to suppress that the film damper 15 bends, the grating | lattice part 2a as shown in FIG. 2 is provided. .

  The DC servo motor 12 and the DC servo motor 16 described above are air conditioner control devices according to a setting mode of a temperature setting switch or the like (not shown) provided on a control panel 20 (corresponding to the operation means of the present invention) of the driver's seat. 19 (corresponding to the control means of the present invention), and the position information of the output end is fed back to the air conditioner control device 19 (see FIG. 3).

  As described above, the configuration including the winding shafts 9 and 10, the film damper 11, the DC servo motor 12, and the air conditioner control device 19 is the temperature adjusting means 100 that is an opening / closing device to which the present invention is applied. , 14, film damper 15, DC servo motor 16, intermediate shafts 17 and 18, and air conditioner control device 19 are air outlet switching means 200 that is an opening / closing device to which the present invention is applied.

  When the air conditioner control device 19 drives the film damper 11 or the film damper 15 in order to change the amount of air blown to the heater core 5 or change the blowing mode from the outlets 6, 7, 8. The DC servo motor 12 or the DC servo motor 16 is intermittently controlled.

  Here, the operation of the opening and closing means 100 and 200 of the vehicle air conditioner 1 of the present embodiment will be described. Here, the operation of the opening / closing means 200 will be described in detail, and the description of the operation of the opening / closing means 100 that performs the same operation will be omitted.

  In FIG. 4, the air conditioner control device 19 changes the opening degree of any of the outlets 6, 7, and 8 from the opening degree A at the start of change (here, 0%) to the final target opening degree B (here, 7%). The case where it changes is illustrated.

  FIG. 4A shows a change in the set value of the target opening degree (shown by a broken line) output to the servomotor 16 and the opening degree (solid line) achieved by operating the servomotor 16 to drive the film damper 15. (Shown).

  FIG. 4B shows an on / off state of a voltage applied to the servo motor 16 when the operation is controlled as shown in FIG.

  FIG. 4C shows a change in the noise level generated when the operation is controlled as shown in FIG.

  4A, the air conditioner control device 19 sets a plurality of intermediate target openings C1 to C6 between the change start opening A and the final target opening B, and sequentially updates them. Yes. Here, in order to simplify the control, the intermediate target openings C1 to C6 are set for each predetermined opening (here, 1%) from the opening A at the start of change, and sequentially every control unit time of 250 ms. It has been updated.

  As described above, the servo motor 16 operates so as to quickly achieve the opening degree with respect to the opening degree target that gradually increases by 1% every 250 ms.

  That is, as shown in FIG. 4B, when the intermediate target opening degree C1 is set, the servo motor 16 is quickly turned on and reaches the opening degree C1. When the opening degree C1 is reached, the servo motor 16 is turned off by the fed back position information.

  250 ms after the intermediate target opening degree C1 is set, the intermediate target opening degree C2 is updated and set. When the intermediate target opening degree C2 is set, the servo motor 16 is quickly turned on to reach the opening degree C2. When the opening degree C2 is reached, the servo motor 16 is turned off by the fed back position information.

  When the intermediate target openings C1 to C6 are sequentially updated and finally the final target opening B is set, the servo motor 16 is quickly turned on to reach the opening B. When the opening degree B is reached, the servo motor 16 is turned off by the fed back position information.

  In this manner, the air conditioner control device 19 repeatedly turns on and off the DC servo motor 16 based on the intermediate target openings C1 to C6 and the final target opening B that are sequentially updated, thereby causing the DC servo motor 16 to operate intermittently.

  In response to this, the film damper 15 repeats the operation of stopping immediately after the start of driving and moves from the change start position A position to the final target opening position B. Therefore, as shown in FIG. 4C, since the state immediately after the start of driving with relatively low frictional noise is repeated, the level of frictional noise generated when the film damper 15 is driven does not increase significantly.

  In FIG. 5, the air conditioner control device 19 changes the opening degree of any one of the outlets 6, 7, 8 from the opening degree A at the start of change (here, 0%) to the final target opening degree B (here, 7%). The case where it changes at a stretch without setting the intermediate target opening is illustrated.

  5A, 5B, and 5C are graphs corresponding to FIGS. 4A, 4B, and 4C, respectively.

  As shown in FIG. 5A, when the final target opening degree B is set, the servo motor 16 is quickly turned on and reaches the opening degree B as shown in FIG. When the opening degree B is reached, the servo motor 16 is turned off by the fed back position information.

  The time until the opening B is reached is shorter when the intermediate target opening is not set, but the film damper 15 is continuously driven until the target opening is reached. As shown, the level of frictional sound increases.

  The air conditioner control device 19 of the vehicle air conditioner of the present embodiment automatically controls the blowing temperature and the blowing mode based on conditions set in advance by the control panel 20 and environmental conditions detected by various sensors (not shown) (so-called auto control). When doing so, the opening degree is changed by the control for setting the intermediate target opening degree as illustrated in FIG.

  In addition, the air conditioner control device 19 is in a maximum cooling state in which the vehicle interior is rapidly cooled or rapidly when the set temperature and the blowing mode are changed by manual operation of the control panel 20 or during the automatic control. When the maximum heating state for heating is set, the opening degree is changed by the control illustrated in FIG. 5 without setting the intermediate target opening degree.

  According to the above-described configuration and operation, during automatic control, the DC servo motors 12 and 16 are intermittently operated until the opening of the ventilation port reaches the final target opening, and the film dampers 11 and 15 are stopped immediately after the start of driving. Since the operation is repeated, the noise level associated with the sliding friction of the film dampers 11 and 15 can be suppressed.

  This can prevent the user from feeling uncomfortable due to noise when the user does not expect to change the opening.

  In addition, when the user performs a manual operation or when the maximum heating state or the maximum cooling state is set, the DC servo motors 12 and 16 are continuously operated until the opening degree of the ventilation port reaches the final target opening degree. The film dampers 11 and 15 quickly form the final target opening.

  As a result, when the user expects to change the opening degree, it is difficult to feel some noise due to sliding friction as unpleasant, and thus it is possible to prevent the user from feeling uncomfortable by quickly changing the blowing temperature and the blowing mode.

  Further, the intermittent operation of the DC servo motors 12 and 16 is performed by setting the intermediate target opening, and since the energization state to the DC servo motors 12 and 16 is not finely controlled, the operation control is extremely simple. .

  Further, since the air conditioner control device 19 performs the setting of the intermediate target opening at every predetermined opening from the opening at the start of change, the setting operation is extremely simple.

(Other embodiments)
In the above-described embodiment, a plurality of intermediate target openings C1 to C6 are set between the change start opening A and the final target opening B and sequentially updated. When the opening degree B is not so far away, only one intermediate target opening degree may be set.

  In the above embodiment, the intermediate target openings C1 to C6 are set every predetermined opening (1%) from the opening A at the start of change, and are sequentially updated every 250 ms which is a control unit time. The intermediate target opening need not be every predetermined opening. That is, it is not limited to what is set at equal intervals.

  The real values of the predetermined opening and the control unit time are examples, and can be appropriately set according to the specifications and characteristics of the vehicle air conditioner.

  Further, in the above embodiment, the present invention is applied to the two opening / closing devices of the temperature adjusting means 100 and the outlet switching means 200, but is not limited to these. For example, it is effective even when applied to the inside / outside air switching means.

It is sectional drawing of the vehicle air conditioner in one Embodiment to which this invention is applied. It is a perspective view which shows schematic structure of the switchgear provided in the vehicle air conditioner in this embodiment. It is a block diagram which shows the structure of this embodiment. It is a graph which shows the operation example of this embodiment, (a) is the opening target and opening degree of a damper, (b) is the ON / OFF state of a servomotor, (c) has shown the change of the noise level. It is a graph which shows the operation example of this embodiment, (a) is the opening target and opening degree of a damper, (b) is the ON / OFF state of a servomotor, (c) has shown the change of the noise level.

Explanation of symbols

2 Unit case (duct)
6 Defroster outlet (ventilation opening)
7 Vent outlet (ventilation opening)
8 Foot outlet (ventilation opening)
9, 10, 13, 14 Winding shaft 11, 15 Film damper (membrane member)
12, 16 DC servo motor (drive means)
19 Air conditioner control device (control means)
20 Control panel (operating means)
100 Temperature control means (switching device)
200 Outlet switching means (opening / closing device)
A Opening at start of change B Final target opening C1 to C6 Intermediate target opening

Claims (4)

A vehicle air conditioner having a duct (2) that guides blown air into the passenger compartment and an open / close device (200) that opens and closes the vent holes (6, 7, 8) of the blown air provided in the duct (2). There,
The opening / closing device (200)
Two winding shafts (13, 14) supported rotatably;
Both ends are fixed to each of the winding shafts (13, 14) and are arranged along the ventilation openings (6, 7, 8), and are aligned with the ventilation openings (6, 7, 8). A membranous member (15) having an opening for opening the vent (6, 7, 8);
Drive means (16) for rotationally driving the winding shafts (13, 14);
Control means (19) for controlling the operation of the drive means (16),
The control means (19) is configured to change the opening degree of the ventilation openings (6, 7, 8) from the opening degree (A) at the start of change to the final target opening degree (B). Are intermittently operated ,
When the control means (19) changes the opening degree of the ventilation opening (6, 7, 8) from the opening degree (A) at the start of change to the final target opening degree (B), A plurality of intermediate target openings (C1 to C6) are set between the opening (A) and the final target opening (B), are sequentially updated, and the intermediate target openings (C1 to C6) are sequentially updated. The drive means (19) is operated repeatedly based on the above, and then the drive means (16) is restarted based on the final target opening (B) to intermittently operate the drive means (16). A vehicle air conditioner characterized by the above. The said control means (19) sets the said intermediate | middle target opening degree (C1-C6) for every predetermined opening degree from the said opening time (A) at the time of a change, The vehicle use of Claim 1 characterized by the above-mentioned. Air conditioner. Comprising an operating means (20) for manually operating the air conditioning conditions in the passenger compartment;
The said control means (19) stops the setting of the said intermediate | middle target opening (C1-C6), when the said operation means (20) is manually operated, The Claim 1 or Claim 2 characterized by the above-mentioned. Vehicle air conditioner. The control means (19) stops the setting of the intermediate target opening (C1 to C6) when a maximum cooling state for rapidly cooling the vehicle interior or a maximum heating state for rapid heating is set. The vehicle air conditioner according to any one of claims 1 to 3 .

Images