JP2016150694A - Vehicle air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle air conditioner capable of improving the moldability and the molding accuracy of a fan case including a bell mouth and a filter support member also serving as a runner, achieving light weight and low cost, and surely supporting a filter to block its distorted deformation.SOLUTION: A vehicle air conditioner includes a filter support member 20 also serving as a runner capable of supporting the lower surface of a filter detachably provided in an air flow path between an inside air and outside air switching unit and a fan unit and integrally formed on a bell mouth 10 of an air suction port 11 provided in a fan case 8 of the fan unit, and is characterized in that the filter support member 20 also serving as a runner includes ribs 19 arranged in a cross shape, each rib including a rising part 17 vertically rising from the surface of the bell mouth 10 in a filter installing direction and a parallel part 18 bent from the rising part 17 to extend in parallel to the lower surface of the filter with a given gap.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle air conditioner in which a filter is detachably interposed in an air flow path between an inside / outside air switching unit and a fan unit.

  In a vehicle air conditioner in which a filter is detachably installed in an air flow path between an inside / outside air switching unit and a fan unit, a filter having a configuration in which a filter material made of filter paper or the like is bent a plurality of times in a zigzag shape is usually used doing. Conventionally, this filter has a structure in which a filter material is sandwiched between filter frames, but from the viewpoint of simplifying the filter structure and reducing the cost, the filter frame is omitted and the structure is made frameless. A filter is used.

However, if the filter is made frameless, the rigidity will decrease, so if the pressure loss increases due to clogging or the like, the airflow surface of the filter will bend and deform toward the fan unit by the suction force of the fan, and the filter will be caught in the fan. There was a risk of it.
Therefore, as shown in Patent Document 1, the support member is integrated with the upper surface of the fan case of the fan unit so as to support the lower surface of the filter and prevent the deflection thereof. What has been proposed.

Japanese Patent Laid-Open No. 8-215528 (Japanese Patent No. 3456047)

  What is disclosed in the above-mentioned patent document 1 is that a plurality of linear or curved lines are intersected at a predetermined angle with a plurality of bent portions of the filter in a radial direction from the periphery of the air suction port with respect to the fan case. A plurality of linear or curved ribs are formed at a predetermined angle with a plurality of bent portions of the filter so as to bridge the air intake port from the center position of the air intake port. The support members are configured so as to cross each other.

  The ribs constituting the support members for preventing deflection have a top surface of the bell mouth provided in the air suction port of the fan case and a substantially parallel lower side, and the upper side is substantially parallel to the lower surface of the filter. Even if a fan case including a doughnut-shaped bell mouth is resin-molded, these ribs can also be used as runners, and the resin fluidity with respect to the bell mouth is increased to improve moldability. It is not possible to improve, and because the plate-shaped ribs are wide, deformation such as resin collapse and warpage is likely to occur, and the amount of resin used increases, increasing the weight and cost. There were issues such as factors.

  The present invention has been made in view of such circumstances, and improves the moldability and molding accuracy of a fan case including a bell mouth and a runner / filter support member, and achieves weight reduction and cost reduction. Another object of the present invention is to provide a vehicle air conditioner that can reliably support the filter and prevent its deformation.

In order to solve the above-described problems, the vehicle air conditioner of the present invention employs the following means.
That is, the vehicle air-conditioning apparatus according to the present invention includes an inside / outside air switching unit that switches between the inside air and outside air from the inside air suction port and the outside air suction port using a switching damper, and a fan unit connected to the downstream side of the inside / outside air switching unit. A filter inserted in a predetermined direction so as to cross the air flow path and detachably interposed in the air flow path between the inside / outside air switching unit and the fan unit, and a fan case of the fan unit A runner / filter support member integrally formed on the bell mouth of the air suction port provided, and the runner / filter support member is vertically raised from the bell mouth surface in the installation direction of the filter. A raised portion, and a parallel portion that is curved from the raised portion and extends in parallel with the lower surface of the filter while maintaining a certain gap. Characterized in that there is a structure in which disposed in a cross-like rib having a.

  According to the present invention, the fan case of the fan unit is provided with the runner and filter support member capable of supporting the lower surface of the filter detachably interposed in the air flow path between the inside / outside air switching unit and the fan unit. In the vehicle air conditioner integrally molded on the bell mouth of the air suction port, the runner and filter support member is vertically raised from the bell mouth surface in the filter installation direction, Ribbed from the bell mouth surface because it has a cross-shaped arrangement of ribs that are curved from the raised part and have a parallel part extending parallel to the lower surface of the filter while maintaining a certain gap. And a runner-and-filter support member in which a rib having a parallel portion extending from the rising portion is arranged in a cross shape is integrally formed with the bell mouth, thereby The filter support member as a runner, the fan case comprising bellmouth and runners and filter support member may be molded integrally. Further, even if the pressure loss of the frameless filter increases and the filter tries to bend toward the fan unit side, the deformation of the filter can be prevented by supporting the lower surface of the filter with the runner / filter support member. Therefore, it is possible to improve the moldability by improving the fluidity of the resin when molding into a doughnut-shaped bell mouth by a runner having a rising part, and to prevent deformation due to resin collapse or warping etc. The accuracy can be increased, and the rib is a narrow rib with a gate-like shape consisting of a rising part and a parallel part, so the amount of resin used can be reduced, and the weight and cost can be reduced. it can. Further, it is possible to reliably prevent further increase in pressure loss due to deformation of the filter, interference with the fan due to deformation of the filter, and entrainment.

  Furthermore, the vehicle air conditioner of the present invention is characterized in that, in the above-described vehicle air conditioner, a gate portion is provided at a cross portion of the rib constituting the runner / filter support member.

  According to the present invention, since the gate portion is provided in the cross portion of the rib constituting the runner / filter support member, the resin flows from the gate portion through the cross-shaped parallel portion to the runner / filter support member. A fan case including a member and a bell mouth having a donut shape can be integrally molded with resin. Therefore, at the time of molding the fan case, it is possible to improve the fluidity of the resin to the bell mouth and improve the moldability.

  Furthermore, the vehicle air conditioner according to the present invention is the vehicle air conditioner according to any one of the above, wherein the runner / filter support member has a lower surface of the filter and the bell mouth according to the height of the rising portion of the rib. A space portion with a predetermined interval is formed between the two.

  According to the present invention, since the runner and filter support member forms a space portion at a predetermined interval between the lower surface of the filter and the bell mouth by the height of the rising portion of the rib, the rising height of the rib Accordingly, a sufficient space can be secured between the lower surface of the filter and the bell mouth, and an increase in ventilation resistance around the filter can be suppressed. Therefore, it is possible to prevent the generation of noise and the decrease in the air volume due to the increase in ventilation resistance, and to reduce the noise and improve the performance of the vehicle air conditioner.

  Furthermore, the vehicle air conditioner of the present invention is the vehicle air conditioner described above, wherein the inside air inlet and the outside air inlet are arranged to face one side and the other side in the filter insertion direction. One of the cross-arranged ribs constituting the runner and filter support member is disposed along the insertion direction of the filter in which the inside air suction port and the outside air suction port are disposed, and the other is the insertion direction. It is arrange | positioned in the direction which cross | intersects.

  According to the present invention, the inside air inlet and the outside air inlet are arranged to face one side and the other side in the filter insertion direction, and one of the cross-arranged ribs constituting the runner / filter support member. Is arranged along the insertion direction of the filter in which the inside air inlet and the outside air inlet are arranged, and the other is arranged in a direction crossing the insertion direction, so that the fan is sucked from the inside air inlet and the outside air inlet. The air flow sucked into the unit interferes with the ribs arranged in the direction intersecting the filter insertion direction, but does not interfere with the ribs arranged along the filter insertion direction, and supports the runner and filter. Interference between the member and the airflow can be minimized. Therefore, it is possible to suppress pressure loss due to the runner / filter support member, generation of noise, reduction in air volume, and the like.

  According to the present invention, the runner and filter support member in which ribs having a rising portion raised from the bell mouth surface and a parallel portion extending from the rising portion are arranged in a cross shape are formed integrally with the bell mouth. Accordingly, the fan case including the bell mouth and the runner / filter support member can be integrally formed with the runner / filter support member as a runner. In addition, the pressure loss of the frameless filter increases, and even if the filter tries to bend toward the fan unit side, by supporting the lower surface with a runner and filter support member, the filter can be prevented from being bent and deformed. The runner with the raised part can improve the moldability by improving the fluidity of the resin when molding into a doughnut-shaped bell mouth, and prevent deformation due to resin collapse and warping, etc. In addition, since the rib is a narrow rib having a portal shape formed of a rising portion and a parallel portion, the amount of resin used can be reduced, and the weight and cost can be reduced. Further, it is possible to reliably prevent further increase in pressure loss due to deformation of the filter, interference with the fan due to deformation of the filter, and entrainment.

It is a longitudinal cross-sectional view of the vehicle air conditioner which concerns on one Embodiment of this invention. It is a perspective view of the upper fan case of the said vehicle air conditioner.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 and 2.
FIG. 1 shows a longitudinal sectional view of a vehicle air conditioner according to an embodiment of the present invention, and FIG. 2 shows a perspective view of the upper fan case.
The vehicle air conditioner 1 includes an evaporator and a heater core, and is connected to the upstream side of an HVAC unit that cools or heats air to a predetermined temperature and blows it into the vehicle interior, and regulates the temperature of the HVAC unit. This relates to the inside / outside air switching unit 2 and the fan unit 3 for blowing air.

  The inside / outside air switching unit 2 is disposed on the most upstream side of the vehicle air conditioner 1, and includes an inside air inlet 5 for sucking air in the vehicle interior (hereinafter simply referred to as inside air) and an outside air inlet 6 for sucking outside air. A unit case 4 is provided, and the inside air or the outside air is switched and introduced through a switching damper 7 that is rotatably installed inside the unit case 4. The switching damper 7 is automatically rotated by an actuator or manually via a wire by a lever.

  A fan unit 3 is connected to the downstream side of the inside / outside air switching unit 2. The fan unit 3 here uses a multiblade centrifugal fan (sirocco fan) in which an impeller 9 is rotatably provided in a scroll-shaped fan case 8 via a motor (not shown). ing. The vehicle air conditioner 1 connects the air or outside air introduced through the inside / outside air switching unit 2 by connecting the air outlet provided in the fan case 8 constituting the fan unit 3 to the HVAC unit. It is configured to be pumped and temperature controlled.

  The fan case 8 is divided into a lower fan case 8A for supporting the motor and an upper fan case 8B provided with an air suction port 11 formed by the bell mouth 10, and these are combined together. Yes. In addition, a connection flange portion 12 that rises upward in a quadrilateral shape is integrally formed on the upper surface of the upper fan case 8B, and the unit case 4 of the inside / outside air switching unit 2 is formed through the connection flange portion 12. And in-lay.

  In the air flow path 13 that connects the inside / outside air switching unit 2 and the fan unit 3, a filter 14 that removes dust in the air sucked into the fan unit 3 is located above the upper surface of the fan unit 3 by a predetermined distance. It is installed to cross the air flow path 13. The filter 14 is a frame-less filter having a configuration in which, for example, a filter material such as filter paper is bent a plurality of times in a zigzag shape and both ends thereof are fixed by a packing material, and the unit case 4 of the inside / outside air switching unit 2 It is inserted along the filter guide 15 provided inside, and is detachably interposed.

  At this time, the filter 14 has a zigzag bent direction along the filter guide 15 from the opening 16 on the side surface of the unit case 4 where the inside air inlet 5 is provided. Is to be inserted along. On the other hand, the filter 14 here is a filter frame-less for simplification and cost reduction. When the pressure loss increases due to clogging or the like, the filter surface is moved to the fan unit by the suction force from the fan unit 3. It is easy to bend and deform to the 3 side. In order to prevent the bending deformation of the filter 14, the following configuration is adopted in the present embodiment.

  A rising portion 17 that is raised vertically upward from the surface of the bell mouth 10 so as to bridge the air suction port 11 with respect to the upper surface of the upper fan case 8B, and is smoothly curved from the rising portion 17 Then, a runner and filter support member 20 in which plate-like ribs 19 provided with a lower surface of the filter 14 and a parallel portion 18 extending parallel to the horizontal direction with a certain gap are arranged in a cross shape is integrally molded with resin. It is configured.

The rising portion 17 of the rib 19 is such that the upper surface of the runner / filter support member 20 is a predetermined distance between the upper surface of the fan unit 3, that is, the upper surface of the bell mouth 10 and the lower surface of the filter 14 (for example, about 30 mm in the vertical direction ) Has a height that can maintain the space A.
The runner and filter support member 20 is used as a molding runner when the upper fan case 8B is resin-molded, and the cross portion is provided with a gate portion 21.

  Further, one rib 19A of the cross-arranged ribs 19 constituting the runner / filter support member 20 has an insertion direction of the filter 14 in which the inside air inlet 5 and the outside air inlet 6 are arranged to face each other (FIG. 2). The other rib 19B is disposed in a direction (orthogonal direction; right and left direction in FIG. 2) intersecting the insertion direction.

  That is, the inside air suction port 5 and the outside air suction port 6 of the inside / outside air switching unit 2 are arranged to face the side surfaces of one side and the other side in the insertion direction of the filter 14, and constitute the runner / filter support member 20. One rib 19A of the cross-arranged rib 19 is arranged along the insertion direction of the filter 14 in which the inside air suction port 5 and the outside air suction port 6 are arranged, and the other rib 19B is a direction intersecting the insertion direction. It is set as the arrangement arranged in.

With the configuration described above, according to the present embodiment, the following operational effects can be obtained.
The vehicle air conditioner 1 can switch and introduce the inside air or the outside air by switching the switching damper 7 of the inside / outside air switching unit 2 during the air conditioning operation, and can guide it to the fan unit 3 side. The inside air or the outside air is sucked into the fan unit 3 after dust contained in the air is removed and purified in the process of passing through the filter 14, and is pumped to the downstream HVAC unit by the impeller. Further, the temperature is adjusted by the VAC unit via an evaporator, a heater core, and the like, and is blown into the vehicle interior.

  At this time, the filter 14 is clogged with the passage of time by removing dust in the air, and the pressure loss increases. Since the rigidity of the filter 14 is reduced due to the frame-less structure, when the pressure loss increases, the ventilation surface of the filter 14 tends to bend and deform toward the fan unit 14 due to the suction force on the fan unit 3 side. However, since the runner and filter support member 20 formed integrally with the upper surface of the upper fan case 8B is disposed on the lower surface side of the filter 14, even if it is bent toward the fan unit 3, its lower surface is By supporting with the runner and filter support member 20, the bending deformation of the filter 14 can be prevented.

  Therefore, the filter 14 is bent and deformed due to an increase in pressure loss and interferes with the impeller 9 that is a rotating body of the fan unit 3 or is caught in the impeller 9, thereby causing an accident that leads to damage, failure, or the like. It can be surely prevented.

  On the other hand, the runner / filter support member 20 has a rising portion 17 that is vertically raised from the upper surface of the bell mouth 10 in the installation direction of the filter 14, and is curved from the rising portion 17 so as to be fixed to the lower surface of the filter 14. A rib 19 having a parallel portion 18 extending parallel to the horizontal direction while maintaining a gap is arranged in a cross shape.

  Therefore, the runner and filter support member 20 in which ribs 19 each having a rising portion 17 raised from the upper surface of the bell mouth 10 and a parallel portion 18 extending from the rising portion 17 are arranged in a cross shape is the bell mouth. The upper fan case 8B including the bell mouth 10 and the runner / filter support member 20 can be integrally molded with the resin using the runner / filter support member 20 as a runner.

  As a result, the flowability of the resin during molding into the doughnut-shaped bell mouth 10 can be improved by the runner having the rising portion 17 to improve the moldability, and deformation due to resin collapse or warpage can be prevented. Thus, the molding accuracy can be increased. In addition, since the rib 19 is a narrow rib 19 having a gate shape formed by the rising portion 17 and the parallel portion 18, the amount of resin used is reduced, and the upper fan case 8B is reduced in weight and cost. be able to.

  Further, since the gate portion 21 is provided with respect to the cross portion of the rib 19 constituting the runner / filter support member 20, the resin is applied in four directions from the gate portion 21 through the cross-shaped parallel portion 18. The upper fan case 8B including the runner / filter support member 20 and the doughnut-shaped bell mouth 10 can be integrally molded with resin. Thereby, at the time of molding of the upper fan case 8B, the fluidity of the resin to the bell mouth 10 can be improved and the moldability can be improved.

  In addition, the runner / filter support member 20 forms a space A with a predetermined interval between the lower surface of the filter 14 and the bell mouth 10 by setting the height of the rising portion 17 of the rib 19 to a predetermined height. Therefore, the rising height of the rib 19 can secure a sufficient space A between the lower surface of the filter 14 and the bell mouth 10 and suppress an increase in ventilation resistance around the filter. Therefore, it is possible to prevent the generation of noise and the decrease in the air volume due to the increase in ventilation resistance, and to reduce the noise and improve the performance of the vehicle air conditioner 1.

  Further, in the present embodiment, the inside air inlet 5 and the outside air inlet 6 of the inside / outside air switching unit 2 are arranged facing one side and the other side in the insertion direction of the filter 14, and the runner / filter support member 20 is arranged. One rib 19A of the cross-arranged ribs 19 is arranged along the insertion direction of the filter 14 in which the inside air suction port 5 and the outside air suction port 6 are arranged, and the other rib 19B intersects the insertion direction. The configuration is arranged in the direction.

  For this reason, although the air flow sucked into the fan unit 3 through the inside air suction port 5 and the outside air suction port 6 interferes with the other rib 19B arranged in the direction intersecting the insertion direction of the filter 14, It does not interfere with one rib 19A arranged along the insertion direction of the filter 14, and interference between the runner / filter support member 20 and the airflow can be minimized. Therefore, it is possible to suppress the pressure loss, the generation of noise, the decrease in the air volume, and the like caused by the runner / filter support member 20.

  In addition, this invention is not limited to the invention concerning the said embodiment, In the range which does not deviate from the summary, it can change suitably. For example, in the above embodiment, the outside air intake port 6 of the inside / outside air switching unit 2 is curved and extended upward to open in the horizontal direction, and the inside air intake port 5 is opened in the opposite direction of the lower portion thereof. Although the fan-shaped switching damper 7 is arranged between the six, the inside / outside air switching unit 2 is not limited to this, and can be changed to units of various shapes.

  Further, since the filter 14 is detachable and replaceable from the vehicle interior side in the instrument panel in front of the vehicle interior, if the pressure loss seems to be increased due to clogging or the like, the filter 14 is appropriately used. What is necessary is just to replace | exchange. By exchanging the filter 14, ventilation resistance can be reduced and efficiency can be improved.

DESCRIPTION OF SYMBOLS 1 Vehicle air conditioner 2 Inside / outside air switching unit 3 Fan unit 5 Inside air inlet 6 Outside air inlet 7 Switching damper 8 Fan case 10 Bell mouth 11 Air inlet 13 Air flow path 14 Filter 17 Rising part 18 Parallel part 19 Rib 19A One rib 19B The other rib 20 Runner and filter support member 21 Gate part A Space part

Claims (4)

An inside / outside air switching unit that switches between the inside air and the outside air from the inside air inlet and the outside air inlet through a switching damper; and
A fan unit connected to the downstream side of the inside / outside air switching unit;
A filter inserted in a predetermined direction so as to traverse the air flow path and detachably interposed in the air flow path between the inside / outside air switching unit and the fan unit;
A runner and filter support member integrally formed on the bell mouth of the air suction port provided in the fan case of the fan unit,
The runner and filter support member includes a rising portion that is vertically raised from the bell mouth surface in the direction of installation of the filter, and is curved from the rising portion and is parallel to the lower surface of the filter with a certain clearance. A vehicular air conditioner characterized in that a rib having a parallel portion extending in a cross is arranged in a cross shape.   The vehicle air conditioner according to claim 1, wherein a gate portion is provided at a cross portion of the rib constituting the runner / filter support member.   2. The runner / filter support member is formed with a space portion having a predetermined interval between a lower surface of the filter and the bell mouth according to a height of the rising portion of the rib. Or the vehicle air conditioner of 2. The inside air suction port and the outside air suction port are arranged to face one side and the other side in the insertion direction of the filter, and one of the ribs arranged in a cross constituting the runner and filter support member is 4. The apparatus according to claim 1, wherein the inside air inlet and the outside air inlet are arranged along an insertion direction of the filter in which the inside air inlet and the outside air inlet are arranged, and the other is arranged in a direction crossing the insertion direction. The vehicle air conditioner described in 1.

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