JP2018127052A - Vehicular air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the size, weight and manufacturing cost by simplifying a configuration and improve air blowing efficiency in a vehicular air conditioner.SOLUTION: In an inside air/outside air switching unit 12 constituting a vehicular air conditioner 10, an outside air introduction port 14 and an inside air introduction port 16 are opened on an upper side of a casing 18, and are communicated with a first passage 26 and a second passage 28, respectively. A separation wall 38 for separating the first passage 26 and the second passage 28 from each other is provided within the casing 18, and is extended to an upper portion of a rotary fan 52 of an air blower 20. Outside air taken in from the outside air introduction port 14 is sent from the first passage 26 through a third passage 44 provided on the outer peripheral side of the rotary fan 52 to a first blowout port 48, and inside air taken in from the inside air introduction port 16 is sent from the second passage 28 through a fourth passage 46 provided on the outer peripheral side of the rotary fan 52 to a second blowout port 50.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle air conditioner that adjusts the temperature of a passenger compartment by blowing air that has been temperature adjusted by a heat exchanger in an air conditioning case mounted on the vehicle, and more specifically, introduces outside air and inside air. The present invention relates to a vehicle air conditioner having an inside / outside air switching unit.

  Conventionally, a vehicle air conditioner mounted on a vehicle includes an inside / outside air switching unit that takes in outside air or inside air and blows it with a blower. This inside / outside air switching unit is disclosed in, for example, Patent Document 1. As described above, a blower having two first and second fans is provided at the bottom of the case, and two first and second outside air inlets for introducing outside air are provided at the top of the case, and the inside air There are two first and second inside air inlets for introducing gas. A first air passage and a second air passage which are separated from each other are formed inside the case, and a first outside air introduction port, a first inside air introduction port, a second outside air introduction port and a second inside air introduction port, respectively. The first door and the second door are openably and closably provided on the upstream side of the first air passage and the second air passage.

  When the outside air is introduced, the first and second outside air inlets are closed by the first and second doors, so that the first and second outside air are rotated under the rotating action of the first and second fans of the blower. Outside air is sucked into the first and second air passages through the introduction port, and blown from the first and second outlets to the air conditioning unit side, respectively.

  On the other hand, when the inside air is introduced, the first and second outside air inlets are closed by the first and second doors, so that the first and second inside air are rotated under the rotating action of the first and second fans of the blower. Inside air is sucked into the first and second air passages through the inlet, and is blown to the air conditioning unit through the first and second outlets, respectively.

JP 2012-224197 A

  The vehicle air conditioner according to Patent Document 1 includes a first fan for taking in air from the first air passage side, and a second fan for taking in air from the second air passage side, and second air. The passage goes around the outside of the blower and communicates with the second fan side from below. Therefore, as compared with a blower having a single fan, the provision of two fans increases the weight and size of the blower, and the length of the second air passage is longer than that of the first air passage. As a result, the passage structure becomes complicated, and this also increases the manufacturing cost and increases the size. In addition, since the second air passage becomes longer, the resistance when air flows increases and the blowing efficiency decreases.

  The present invention has been made in consideration of the above-described problems, and is a vehicle air conditioner capable of reducing the size and weight, reducing the manufacturing cost, and improving the air blowing efficiency by simplifying the configuration. The purpose is to provide.

In order to achieve the above object, the present invention provides an air conditioner for a vehicle having an air conditioning case having a flow path through which air flows and an inside / outside air switching unit connected to the air conditioning case and switching between an intake state of the inside air and the outside air. In the device
The inside / outside air switching unit includes an outside air introduction port for taking in outside air and a casing having an inside air introduction port for taking in inside air;
A blower housed in the casing and having a rotating fan;
With
The casing has a first passage communicating with the outside air introduction port, a second passage communicating with the inside air introduction port, and a separation wall separating the first passage and the second passage, and the first passage and the second passage. The passage extends along the axial direction of the blower, and the end of the separation wall is disposed so as to separate the rotary fan when viewed from the axial direction.

  According to the present invention, the casing constituting the inside / outside air switching unit of the vehicle air conditioner includes the first passage communicating with the outside air introduction port for taking in outside air and the second passage communicating with the inside air introduction port for taking in the outside air. In addition, a separation wall for separating each other is formed between the first passage and the second passage. The first passage and the second passage extend along the axial direction of the blower housed in the casing, and the end of the separation wall is disposed so as to separate the rotary fan when viewed from the axial direction.

  Accordingly, since a single rotating fan is separated by a separation wall, and the separated parts can be used respectively, outside air and inside air can be taken in at the same time, so that the conventional one having two first and second fans is provided. Compared with the vehicle air conditioner according to the technology, the configuration can be simplified, the size and weight can be reduced, and the manufacturing cost can be reduced. Further, since the first and second passages are formed so as to extend toward the rotary fan, the passage configuration is simplified because the complicated passage configuration as in the vehicle air conditioner according to the related art is not obtained. By reducing the length, the ventilation efficiency can be improved by reducing the ventilation resistance when air flows through the first and second passages.

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

  That is, the casing constituting the inside / outside air switching unit includes a first passage that communicates with an outside air introduction port that takes in outside air, and a second passage that communicates with an inside air introduction port that takes in inside air, and the first passage and the second passage. A separation wall for separating each other is formed between the first passage and the second passage along the axial direction of the blower housed in the casing, and the end of the separation wall is viewed from the axial direction. By arranging the rotary fans so as to be separated, it is possible to take in outside air and inside air simultaneously by using a part of each separated single rotary fan. As a result, as compared with the vehicle air conditioner according to the prior art provided with two fans, the configuration can be simplified, the size and weight can be reduced, and the manufacturing cost can be reduced. In addition, since the first and second passages are respectively extended in the axial direction toward the rotary fan, there is no complicated passage configuration as in the vehicular air conditioner according to the prior art. By shortening the length by simplifying the two passages, it is possible to reduce the ventilation resistance when air flows and to improve the blowing efficiency.

1 is an overall schematic configuration diagram of an inside / outside air switching unit in a vehicle air conditioner according to an embodiment of the present invention.

  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 inside / outside air switching unit 12 that is connected to a side portion of an air conditioning case (not shown) constituting each air passage and takes in outside air and inside air. Yes.

  The inside / outside air switching unit 12 includes a casing 18 having an outside air introduction port 14 and an inside air introduction port 16, a blower 20 provided at a lower portion of the casing 18, and a filter 22 provided inside the casing 18.

  The casing 18 has, for example, an outside air inlet 14 and an inside air inlet 16 at the upper part thereof, and a storage part 24 in which the blower 20 is accommodated at the lower part.

  The outside air introduction port 14 and the inside air introduction port 16 open toward the sides of the casing 18 and open in directions opposite to each other. The outside air introduction port 14 communicates with the end portion of the first passage 26 extending in the vertical direction, and a first switching damper 30 that switches between the two communication states is rotatably provided at the boundary portion.

  On the other hand, the inside air introduction port 16 communicates with the end portion of the second passage 28 extending in the vertical direction, and a second switching damper 32 for switching between the two communication states is rotatably provided at the boundary portion. The first and second switching dampers 30, 32 are butterfly dampers having a pair of blades 36 extending so as to be separated from each other with respect to the central support shaft 34. Rotate by a predetermined angle.

  For example, the first passage 26 and the second passage 28 are semicircular in cross section and extend in a straight line vertically downward, and are separated from each other by a separation wall 38 provided at the boundary thereof. A communication port 40 is formed in the upper portion of the external air inlet 14 and the internal air inlet 16. The communication port 40 is formed so that the first passage 26 and the second passage 28 can communicate with each other, and a communication switching damper 42 is rotatably provided so as to face the communication port 40. Similar to the first and second switching dampers 30 and 32, the communication switching damper 42 is a butterfly damper, and is provided so that the open / close state of the communication port 40 can be switched.

  Further, a filter 22 described later is provided in the middle of the first and second passages 26 and 28.

  The storage part 24 is circular in cross section and formed wider than the first and second passages 26 and 28 in the radial direction, and the rotary fan 52 of the blower 20 is stored therein. The upper portion of the storage portion 24 is divided into two by a separation wall 38 that extends to the upper portion of the rotary fan 52, and third and third portions extending along the rotary fan 52 are provided on the outer peripheral side of the rotary fan 52. Fourth passages 44 and 46 are provided.

  The third and fourth passages 44 and 46 are formed to be symmetrical with respect to the separation wall 38 (in FIG. 1, the third passage 44 is on the near side, and the fourth passage 46 is on the back side of the rotary fan 52). The third passage 44 is connected and communicated with the lower end of the first passage 26, and the fourth passage 46 is connected and communicated with the lower end of the second passage 28. And the 1st blower outlet 48 opens to the downstream of the 3rd channel | path 44, and the 2nd blower outlet 50 opens to the downstream of the 4th channel | path 46, and each is connected with the air-conditioning case which is not shown in figure.

  That is, in the casing 18, the outside air inlet 14 communicates with the first air outlet 48 through the first and third passages 26, 44, and the inside air inlet 16 passes through the second and fourth passages 28, 46. It communicates with the second outlet 50.

  The blower 20 is, for example, a centrifugal fan having a rotary fan 52 having a plurality of fins and a drive motor 54 that rotationally drives the rotary fan 52, and the rotary fan 52 is placed in the housing portion 24 of the casing 18. The drive motor 54 is housed and connected to the rotary fan 52 via a drive shaft 56. The rotary fan 52 is provided so that a half along the circumferential direction thereof faces the third passage 44 and the other half faces the fourth passage 46. When the outside air and the inside air are simultaneously blown, the rotary fan 52 Half of 52 is used to guide outside air from the first passage 26 to the third passage 44 and the other half is used to guide inside air from the second passage 28 to the fourth passage 46.

  The filter 22 is, for example, a non-woven filter capable of removing dust contained in air, is formed in a rectangular cross section, and is disposed so as to straddle the first passage 26 and the second passage 28 at a substantially central portion of the casing 18. As the air flowing through the first and second passages 26 and 28 passes through the filter 22, dust contained in the air is removed.

  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, a case where outside air and inside air are taken into the casing 18 at the same time and blown toward the air conditioning case will be described. In this case, as shown in FIG. 1, the first and second switching dampers 30 and 32 are opened, the outside air inlet 14 and the first passage 26 are communicated, and the inside air inlet 16 and the second passage are communicated. 28 is communicated. Further, the communication port 40 is closed by the communication switching damper 42.

  Then, by rotating the rotary fan 52 under the driving action of the blower 20, outside air (see the white arrow in FIG. 1) is sucked through the outside air inlet 14 by a part of the rotary fan 52 facing the first passage 26, At the same time, the inside air (see the black arrow in FIG. 1) in the vehicle compartment is sucked through the inside air introduction port 16, the outside air flows from the first passage 26 to the third passage 44, and the inside air flows from the second passage 28 to the fourth passage. It flows to 46. At this time, the dust and the like contained in the air are preferably removed by passing the outside air and the inside air through the filter 22.

  The outside air flows downstream along the third passage 44 provided on the outer peripheral side as the rotary fan 52 of the blower 20 rotates, and is blown from the first air outlet 48 to an air conditioning case (not shown). On the other hand, the inside air flows to the downstream side along the fourth passage 46 by a part of the rotary fan 52 facing the second passage 28 by the rotation of the rotary fan 52 of the blower 20, and the air conditioning not shown from the second outlet 50. It is blown into the case.

  That is, the outside air is taken in from the outside air introduction port 14 and the inside air is taken in from the inside air introduction port 16 and blown to the air conditioning case side through the first and second outlets 48 and 50, respectively.

  Next, when only the outside air is taken in, the first switching damper 30 is opened and the second switching damper 32 is closed (see the two-dot chain line shape in FIG. 1). The communication with the two passages 28 is blocked, and the communication switching damper 42 is opened and the communication port 40 is opened (see the two-dot chain line shape in FIG. 1).

  And the air (outside air) taken in from the outside air introduction port 14 under the driving action of the blower 20 flows from the first passage 26 to the third passage 44 and simultaneously to the second passage 28 through the open communication port 40. It also flows to the fourth flow passage 46. That is, the outside air flows through the first and second passages 26 and 28 simultaneously to the third and fourth passages 44 and 46.

  The outside air flows to the first and second outlets 48 and 50 along the third and fourth passages 44 and 46, respectively, as the rotary fan 52 of the blower 20 rotates, and is sent to an air conditioning case (not shown). The

  Finally, when only the inside air is taken in, the second switching damper 32 is opened and the first switching damper 30 is closed (see the two-dot chain line shape in FIG. 1). The communication with the one passage 26 is blocked, and the communication switching damper 42 is opened and the communication port 40 is opened (see the two-dot chain line shape in FIG. 1). And the air (inside air) taken in from the inside air introduction port 16 under the driving action of the blower 20 flows from the second passage 28 to the fourth passage 46 and at the same time through the opened communication port 40 to the first passage 26. The flow also flows to the third flow passage 44. That is, the inside air flows through the first and second passages 26 and 28 simultaneously to the third and fourth passages 44 and 46.

  Then, the inside air flows to the first and second outlets 48 and 50 along the third and fourth passages 44 and 46, respectively, as the rotary fan 52 of the blower 20 rotates, and blows to the air conditioning case (not shown). Is done.

  That is, when only one of the outside air and the inside air is blown, the first and third passages 44 and 44 used for blowing the outside air are opened by opening the communication port 40 under the switching action of the communication switching damper 42. The 1 blower outlet 48, the 2nd and 4th channel | path 46 used for internal air ventilation, and the 2nd blower outlet 50 are used simultaneously, and external air or internal air is ventilated to the air-conditioning case side.

  As described above, in the present embodiment, in the inside / outside air switching unit 12 constituting the vehicle air conditioner 10, for example, the single rotary fan 52 is used half by one for taking in outside air and taking in inside air. Thus, the blower 20 having the rotating fan 52 is configured to be able to take in outside air and inside air at the same time and supply it to the air conditioning case side. Therefore, compared with the vehicle air conditioner according to the related art having two first and second fans, the configuration is simplified and the size and weight are reduced by using the blower 20 having a single rotating fan 52. As a result, the manufacturing cost can be reduced.

  Moreover, it is not necessary to set it as the channel | path structure which wraps around the outer peripheral side of an air blower like the vehicle air conditioner which concerns on a prior art, and two 1st and 2nd extended along the axial direction from the said fan 20 upper direction. Since the passages 26 and 28 can be communicated with each other, the length of the intake passage can be shortened as compared with the vehicle air conditioner. As a result, the ventilation resistance when air flows through the first and second passages 26 and 28 can be reduced, and the blowing efficiency from the inside / outside air switching unit 12 to the air conditioning case can be improved.

  Furthermore, since the passage configuration can be simplified as compared with the vehicle air conditioner according to the prior art, the casing 18 can be simplified, and accordingly, the size and weight can be reduced.

  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 ... Inside / outside air switching unit 14 ... Outside air introduction port 16 ... Inside air introduction port 18 ... Casing 20 ... Fan 26 ... 1st channel | path 28 ... 2nd channel | path 30 ... 1st switching damper 32 ... 2nd switching damper 38 ... Separation wall 40 ... Communication port 42 ... Communication switching damper 44 ... Third passage 46 ... Fourth passage 48 ... First air outlet 50 ... Second air outlet 52 ... Rotating fan

Claims (1)

In an air conditioner for a vehicle having an air conditioning case having a flow path through which air flows, and an inside / outside air switching unit that is connected to the air conditioning case and switches between an intake state of inside air and outside air,
The inside / outside air switching unit includes an outside air introduction port for taking in the outside air and a casing having an inside air introduction port for taking in the inside air,
A blower housed inside the casing and having a rotating fan;
With
The casing includes a first passage communicating with the outside air introduction port, a second passage communicating with the inside air introduction port, and a separation wall separating the first passage and the second passage, The first passage and the second passage extend along the axial direction of the blower, and the end of the separation wall is disposed so as to separate the rotating fan when viewed from the axial direction. A vehicle air conditioner.

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