JP2018039457A - Vehicular air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To largely secure an opening area of an inside air taking-in port while reducing the size in a vehicular air conditioner.SOLUTION: In an inside/outside air change-over unit 14 constituting a vehicular air conditioner, an inside air taking-in port 54 capable of taking in inside air is provided on a front side wall 30b of an upper case 30, and a damper 58 of a half inside air damper mechanism 34 is provided in an openable/closable manner to face the inside air taking-in port 54. A mounting section of the damper 58 is disposed to face an end of a filter 32, and is fixed by a fixation member 60. A valve section on the other end side, which excludes the mounting section, is provided in a tiltable manner to face a space S between a lower surface of the filter 32 and a lower case 24.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle air conditioner, and more particularly to a vehicle air conditioner having an inside / outside air switching unit for taking in inside air or outside air.

  2. Description of the Related Art Conventionally, a vehicle air conditioner mounted on a vehicle takes in inside / outside air by a blower unit, supplies it to an air conditioning case, and is heated by an air cooled by an evaporator as a cooling means and a heater core as a heating means. The air is mixed with a desired mixing ratio to adjust the temperature and blown into the passenger compartment.

  For example, as disclosed in Patent Document 1, the blower unit used in this vehicle air conditioner has an internal air intake port and an external air intake port that open at the top of the casing, and a side portion adjacent to the internal air intake port. An opening into which the filter can be inserted is formed and closed by a cover member. The cover member is formed with an internal air flow inlet communicating with the inside of the casing, and is opened and closed by an on-off valve, thereby switching the communication state between the inside and the outside of the casing.

  During the heating operation of the vehicle air conditioner, when the outside air is introduced, the on-off valve is opened to open the inside air flow inlet and introduce a part of the inside air outside the casing into the inside together with the outside air.

JP 2006-56357 A

  However, in the vehicle air conditioner according to Patent Document 1 described above, the opening / closing valve is provided on the cover member and is configured to open inside the cover member during the opening operation. It is necessary to secure a space for the vehicle, and there is a problem that the vehicle air conditioner including the blower unit is enlarged in the longitudinal direction of the vehicle by the space.

  In addition, instead of providing an opening / closing valve on the cover member mounted on the casing as described above, for example, it is conceivable to provide an opening / closing valve on a damper that switches between outside air introduction and inside air circulation. A plate-shaped cantilever damper is possible.For example, in a butterfly damper having a pair of blades extending in a direction away from the rotation axis or a damper formed in a cross-sectional fan shape, an on-off valve is used. Can not be provided.

  Furthermore, an on-off valve may be provided at a position downstream of the filter provided inside the casing to avoid contact with the filter when the on-off valve rotates. The height dimension of the casing increases by the amount of offset of the valve downward, and the vehicular air conditioner becomes larger in the height direction.

  The present invention has been made in consideration of the above-described problems, and an object of the present invention is to provide a vehicle air conditioner that can ensure a large opening area of the inside air intake port while reducing the size of the device. .

In order to achieve the above object, the present invention provides an air conditioning case having an air flow path and an air outlet, an inside / outside air switching unit connected to the air conditioning case, and air taken in by the inside / outside air switching unit. A vehicle air conditioner in which a filter is housed in the casing of the inside / outside air switching unit.
The casing has an internal air intake port on the downstream side of the filter housed in the casing and different from the wall portion in which the filter insertion port into which the filter is inserted is formed. The internal air intake port is opened and closed. A damper is provided freely, the mounting portion to the wall portion is disposed so as to overlap the filter, and the opening / closing portion for opening and closing the inside air intake port is disposed on the downstream side of the filter.

  According to the present invention, the casing of the inside / outside air switching unit constituting the vehicle air conditioner is on the downstream side of the filter housed therein, and the wall portion in which the filter insertion port into which the filter is inserted is formed. The inside air intake is formed in a different wall part, a damper is provided at the inside air intake so that it can be opened and closed, and the mounting part for the wall is arranged so as to overlap the filter. It arrange | positions so that it may become a downstream.

  Therefore, compared to a conventional vehicle air conditioner in which an opening / closing valve is provided in a cover member attached to the opening into which the filter is inserted, the opening / closing portion is arranged so as to face the space on the downstream side of the filter. Compared with the case where the filter is completely offset in the height direction by arranging the mounting part so that it overlaps in the height direction of the filter. The height dimension can also be reduced. Further, by providing the inside air intake port on the wall portion, it is possible to ensure a large opening area as compared with the case where the conventional cover member is provided with the on-off valve.

  Furthermore, the damper may be formed from a plate-like elastic member.

  According to the present invention, the following effects can be obtained.

  That is, the casing of the inside / outside air switching unit constituting the vehicle air conditioner has a wall portion on the downstream side of the filter housed therein and different from the wall portion in which the filter insertion port into which the filter is inserted is formed. An internal air intake is formed in the internal air intake so that the damper can be freely opened and closed, and the mounting portion is arranged so as to overlap the filter with respect to the wall, and the open / close portion that opens and closes the internal air intake is located downstream of the filter. By arranging in such a manner, the longitudinal dimension along the front-rear direction of the vehicle can be reduced as compared with the conventional vehicle air conditioner in which the opening / closing valve is provided in the cover member attached to the opening into which the filter is inserted. At the same time, the height dimension can be reduced. Further, by providing the inside air intake port in the wall portion, it is possible to secure a large opening area as compared with the case where the conventional cover member is provided with the on-off valve.

1 is an overall perspective view showing a vehicle air conditioner according to an embodiment of the present invention. It is sectional drawing of the internal / external air switching unit in the vehicle air conditioner of FIG. FIG. 3 is an enlarged cross-sectional view showing the vicinity of a semi-inside air switching damper mechanism in the inside / outside air switching unit of FIG. 2. FIG. 3 is a front view of the inside / outside air switching unit shown in FIG. 2.

  DESCRIPTION OF EMBODIMENTS Preferred embodiments of a vehicle air conditioner according to the present invention will be described in detail below with reference to the accompanying drawings. In FIG. 1, reference numeral 10 indicates a vehicle air conditioner according to an embodiment of the present invention.

  As shown in FIG. 1, the vehicle air conditioner 10 includes an air conditioning case 12 that constitutes each passage of air, and an inside / outside air switching unit 14 that is connected to a side portion of the air conditioning case 12 and takes in outside air / inside air. An evaporator and a heater core (not shown) are housed in the air conditioning case 12 to control the flow of cold and hot air flowing through the passage under the switching action by the damper mechanism.

  The air conditioning case 12 has a vent blower port 16 and a defroster blower port 18 for blowing air into the vehicle interior above the air conditioning case 12 and switching between the inside and outside air via a connecting duct 20 on one side along the width direction of the vehicle. Units 14 are connected.

  That is, the vehicle air conditioner 10 is an HVAC (Heating, Ventilation, and Air Conditioning) in which a blower unit 22 is provided along with an inside / outside air switching unit 14 on a side portion of the air conditioning case 12.

  As shown in FIGS. 1 and 2, the inside / outside air switching unit 14 is connected to a blower unit 22, a lower case 24 that forms a part of the blower unit 22, and an upper portion of the lower case 24 to introduce outside air / inside air. An upper case 30 having an outside air inlet 26 and an inside air inlet 28, a filter 32 provided at a boundary portion between the lower case 24 and the upper case 30, and a side portion of the upper case 30. And a half air damper mechanism 34.

  As shown in FIG. 2, the blower unit 22 includes, for example, a rotary fan 36 having a plurality of fins, a drive motor 38 that rotationally drives the rotary fan 36, and a housing that holds an end of the drive motor 38. 40 is a centrifugal fan. In the blower unit 22, the axes of the rotary fan 36 and the drive motor 38 are in the vertical direction (in the directions of arrows A1 and A2 in FIG. 2), the rotary fan 36 is upward (in the direction of arrow A1), and the drive motor 38 is downward. (Arrow A2 direction)

  The lower case 24 has a storage hole 42 in which the rotary fan 36 of the blower unit 22 is stored in a substantially central portion, and a spiral passage 44 formed on the outer peripheral side of the storage hole 42. The side end is connected to the connecting duct 20 (see FIG. 1). Thereby, the inside / outside air switching unit 14 including the blower unit 22 and the air conditioning case 12 communicate with each other via the connection duct 20.

  A cover plate 48 having a bell mouth 46 opened at the center thereof is mounted on the upper portion of the lower case 24, and the lower case 24 communicates with the inside of the upper case 30 provided above through the bell mouth 46.

  The upper case 30 has an outside air inlet 26 for taking in air outside the vehicle and a pair of inside air inlets 28 for taking in the air inside the upper case 30, and the outside air inlet 26 and the inside air inlet port. A set of switching dampers 50 for switching the open / close state of 28 is provided inside.

  Further, the upper case 30 is opened to the filter insertion port 52 opened on the rear side wall 30a on the vehicle rear side (arrow B1 direction) and on the front side wall (wall portion) 30b on the vehicle front side (arrow B2 direction). The filter insertion port 52 is formed in a rectangular shape in cross section, and the filter 32 is inserted and stored in the upper case 30 through the filter insertion port 52. Is closed when the cover member 56 is attached.

  On the other hand, as shown in FIGS. 2 to 4, the inside air intake 54 is, for example, rectangular in cross section and formed to be offset toward the lower case 24 (in the direction of arrow A <b> 2) with respect to the filter insertion opening 52. A semi-inside air damper mechanism 34 is provided inside 30 b so as to face the inside air intake 54.

  The semi-inside air damper mechanism 34 includes, for example, a damper 58 that can open and close the inside air intake 54 and a plurality of fixing members 60 that fix one end of the damper 58 to the inside of the front side wall 30b. .

  For example, the damper 58 has a rectangular cross section and is formed in a plate shape from an elastic material such as hard rubber. The damper 58 is formed in an area larger than the opening area of the inside air intake 54, As shown in FIG. 4, a mounting portion 62 fixed by the fixing member 60 is formed, and the portion on the other end side with respect to the mounting portion 62 tilts by a predetermined angle with respect to the mounting portion 62. Thus, a valve part (opening / closing part) 64 that opens and closes is formed.

  The fixing member 60 is made of, for example, tapping and the like, and is inserted into a hole (not shown) formed in the attachment portion 62 of the damper 58 and is located above the inside air intake 54 (in the direction of arrow A1). The damper 58 is fixed by screwing into the front side wall 30 b of the case 30. At this time, the damper 58 is a free end to which the upper mounting portion 62 is fixed and the lower valve portion 64 side (the other end side, arrow A2 direction) is not fixed, and the inside air intake port 54 is closed. In addition, only the valve portion 64 is provided so as to face the space S provided between the lower surface of the filter 32 and the lower case 24 (see FIG. 3).

  The vehicle air conditioner 10 according to the embodiment of the present invention is basically configured as described above. Next, its operation and effects will be described.

  First, the case where the outside air is taken in and the heating operation is performed will be described. Based on a control signal from a controller (not shown), the drive motor 38 of the blower unit 22 is rotationally driven to rotate the rotary fan 36. As shown in FIG. 2, the inside air inlet 28 is under the switching action of the switching damper 50. Is closed and the outside air inlet 26 is opened. Then, air outside the vehicle is sucked into the upper case 30 through the outside air inlet 26, passes through the filter 32, and then flows to the lower case 24 side (arrow A2 direction).

  At this time, since the interior of the upper case 30 has a negative pressure more than the vehicle interior, the valve portion 64 of the damper 58 in the semi-inner air damper mechanism 34 is drawn inward, and the front side wall with the fixed mounting portion 62 as a fulcrum. It tilts away from 30b (in FIG. 2, a two-dot chain line shape), and the inside air intake 54 is opened. As a result, the inside air in the vehicle compartment flows into the upper case 30 through the inside air inlet 54.

  The inside air is mixed with outside air in the space S downstream of the filter 32 and is sucked by the rotary fan 36 toward the lower case 24 (in the direction of the arrow A2), and then the passage from the inside of the rotary fan 36 to the outer peripheral side. By being sent to 44, the air flows along the passage 44 to the downstream side while being swirled along the passage 44, and is supplied to the air conditioning case 12 through the connection duct 20.

  In this way, when performing the heating operation by taking in the outside air, the inside air in the passenger compartment having a relatively high temperature is taken in and mixed with the outside air by opening the damper 58 of the semi-inside air damper mechanism 34. It becomes possible to supply mixed air having a high temperature to the air conditioning case 12 side.

  Next, a case where the inside air is taken in and the heating operation is performed will be described. The rotary fan 36 is rotated under the driving action of the blower unit 22, and the inside air inlet 28 is opened and the outside air inlet 26 is closed under the switching action of the switching damper 50, so that the air in the vehicle interior is brought into the inside air inlet 28. Through the filter 32, and after passing through the filter 32, flows to the lower case 24 side.

  Then, after the air introduced from the inside air inlet 28 and the opened inside air inlet 54 is sucked from the upper case 30 to the lower case 24 side (in the direction of arrow A2) by the rotating fan 36, from the inside of the rotating fan 36 By being sent out to the passage 44 on the outer peripheral side, the air flows along the passage 44 to the downstream side and is supplied to the air conditioning case 12 through the connection duct 20.

  As described above, in the present embodiment, in the inside / outside air switching unit 14 constituting the vehicle air conditioner 10, the inside air intake 54 that can introduce the inside air is formed in the front side wall 30 b of the upper case 30. A damper 58 of the semi-inside air damper mechanism 34 that can freely open and close the opening 54 is provided, and a mounting portion 62 of the damper 58 is disposed on the front side wall 30 b so as to face the front end of the filter 32, and a valve portion 64 other than the mounting portion 62 is provided. Are arranged so as to face the space S between the lower surface of the filter 32 and the lower case 24.

  As a result, the valve portion 64 that opens and closes does not overlap the filter 32 as compared with the conventional vehicle air conditioner in which the opening and closing valve is provided in the cover member that is mounted in the opening into which the filter can be inserted. In the (in the direction of arrow B2), the filter 32 can be disposed close to the filter 32. Accordingly, the longitudinal dimension of the inside / outside air switching unit 14 including the upper case 30 can be reduced.

  Further, since the mounting portion 62 of the damper 58 is disposed so as to overlap in the height direction of the filter 32 (arrow A1, A2 direction), for example, the damper is disposed so as to be completely offset downward from the filter. Since the height dimension can be suppressed as compared with the case, the size can also be reduced in the height direction.

  Further, by providing the inside air intake 54 on the front side wall 30b of the upper case 30, it is possible to secure a large opening area as compared with the conventional technique in which an opening / closing valve is provided inside the cover member. It is possible to capture sufficiently.

  Furthermore, since the size of the vehicle air conditioner 10 is reduced with the downsizing of the inside / outside air switching unit 14, the degree of freedom in the installation layout in the vehicle is improved, and the cabin space in which the occupant gets is wider. It can be secured.

  In addition, the vehicle air conditioner according to the present invention is not limited to the above-described embodiment, and it is needless to say that various configurations can be adopted without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Vehicle air conditioner 12 ... Air conditioning case 14 ... Inside / outside air switching unit 20 ... Connection duct 22 ... Blower unit 24 ... Lower case 30 ... Upper case 30b ... Front side wall 32 ... Filter 34 ... Half-inside air damper mechanism 54 ... Inside air intake port 58 ... Damper 60 ... Fixing member 62 ... Mounting part 64 ... Valve part

Claims (2)

An air-conditioning case having a flow path for air and an air outlet, an inside / outside air switching unit connected to the air-conditioning case, and a blower unit for sending the air taken in by the inside / outside air switching unit to the air-conditioning case In a vehicle air conditioner in which a filter is housed in a casing of the inside / outside air switching unit,
The casing is provided with an inside air intake port on a wall portion which is downstream of the filter housed therein and different from a wall portion where the filter insertion port into which the filter is inserted is formed. The opening is provided with a damper that can be freely opened and closed, and the attachment portion to the wall portion is disposed so as to overlap the filter, and the opening and closing portion that opens and closes the inside air intake port is disposed on the downstream side of the filter. An air conditioner for a vehicle. The vehicle air conditioner according to claim 1,
The vehicle air conditioner is characterized in that the damper is formed of a plate-like elastic member.

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