WO2019021707A1 - Vehicle air-conditioning unit - Google Patents

Abstract

This vehicle air-conditioning unit comprises: an air-conditioning case (12) wherein is formed an in-case passage (123) through which air flows; a blower (20); and an airflow rectifier (16, 26, 28). The blower has a blower fan (201) which rotates about a fan axis (CL1) and is disposed in the in-case passage, and air pulled from one side in the axial direction (DRa) of the fan axis is pushed by means of the rotation of the blower fan. The airflow rectifier is disposed in the in-case passage downstream of the airflow with respect to the blower fan, and air pushed by the blower fan passes through the airflow rectifier. The blower fan is disposed in such orientation that the other side along the fan axis, which is opposite of said one side in the axial direction, extends toward the downstream end of the airflow in the in-case passage. The airflow rectifier mitigates swirling flow generated by the rotation of the blower fan in the air pushed by the blower fan, in contrast to the state of the pushed air prior to flowing into the airflow rectifier.

Description

Vehicle air conditioning unit CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is based on Japanese Patent Application No. 201-143856 filed on July 25, 2017, Japanese Patent Application No. 2018-20336 filed on February 7, 2018, and April 17, 2018. No. 2018-79112 filed in the United States of America, the contents of which are incorporated herein by reference.

The present disclosure relates to a vehicle air conditioning unit.

As a vehicle air conditioning unit of this type, for example, a vehicle air conditioning unit described in Patent Document 1 is conventionally known. The vehicle air conditioning unit described in the patent document 1 includes an air conditioning case in which an in-case passage through which air flows is formed, and a blower for blowing air blown out from the vehicle air conditioning unit toward the vehicle interior. . Since the blower is a centrifugal blower, it has a centrifugal fan (specifically, a sirocco fan) that rotates around the fan axis and blows out air drawn radially inward from one side of the fan axis in the axial direction. ing. The centrifugal fan is disposed upstream of the air flow in the case internal passage. The passage in the case extends to one side in the radial direction of the centrifugal fan on the air flow downstream side of the centrifugal fan. That is, the centrifugal fan is arranged such that the fan axis of the centrifugal fan is orthogonal to the air flow direction on the downstream side of the air flow with respect to the centrifugal fan.

JP, 2015-182566, A

As described above, in the vehicle air conditioning unit of Patent Document 1, the centrifugal fan is disposed such that the fan axis is orthogonal to the air flow direction on the downstream side of the air flow with respect to the centrifugal fan. However, due to various limitations, it may be considered that the direction of the blower fan of the blower can not be made that way depending on the vehicle air conditioning unit.

Therefore, for example, the blower fan of the blower in a direction in which the other side of the fan axis that is opposite to one side (specifically, the air intake side) of the fan axis in the axial direction extends downstream of the air flow in the case inner passage. It is also conceivable that the When the blower fan is arranged as such, the air blown out from the blower fan flows to the downstream side of the air flow of the blower fan while having the swirling flow generated by the rotation of the blower fan.

Here, in the air conditioning unit for vehicles, when air is blown out, generally, a plurality of air outlets are simultaneously opened. For example, a plurality of face outlets are formed in the air conditioning case of the air conditioning unit for a vehicle, and in the face mode or the like, the plurality of face outlets are simultaneously opened to blow out air.

If the air with the swirling flow reaches the plurality of air outlets which are simultaneously opened in this manner and is blown out into the vehicle compartment, the air is blown out from the plurality of air outlets due to the swirling flow. Airflow may be uneven. In such a case, the air volume ratio may collapse between the plurality of air outlets, and the temperature in the passenger compartment may be biased. That is, the wind distribution and temperature controllability of the vehicle air conditioning unit may be deteriorated.

In addition, although it is possible to arrange a plurality of outlets so as to suppress the deviation of the air volume caused by the swirling flow among the plurality of outlets, it is necessary to arrange a plurality of outlets as such. If so, the arrangement of the air outlet would be greatly restricted, which is not preferable. As a result of the inventors' detailed studies, the above was found.

In view of the above-described point, the present disclosure can arrange a plurality of air outlets without excessively restricting the arrangement of the air outlets in order to avoid deviation of the blowing air volume caused by the swirling flow due to the rotation of the air blowing fan. It is an object of the present invention to provide a vehicle air conditioning unit.

In order to achieve the above object, according to one aspect of the present disclosure, a vehicle air conditioning unit includes:
An air conditioning case in which a passage in the case through which air flows is formed,
A blower having a blower fan rotated around the fan axis and disposed in the passage in the case, and rotating the blower fan to blow out air drawn in from one side in the axial direction of the fan axis;
And a rectifying mechanism disposed downstream of the air flow fan with respect to the air flow fan in the passage in the case and through which the air blown out from the air flow fan passes.
The blower fan is disposed in such a direction that the other side of the fan axis line opposite to the one side in the axial direction extends to the air flow downstream side of the passage in the case,
The rectification mechanism suppresses the swirling flow generated by the rotation of the blower fan in the air blown out from the blower fan as compared to the air blown out before it flows into the rectification mechanism.

In this case, the swirling flow is suppressed on the downstream side of the air flow with respect to the flow straightening mechanism, so that it is not necessary to excessively restrict the arrangement of the air outlet in consideration of the swirling flow. That is, it becomes possible to arrange a plurality of air outlets without excessively restricting the arrangement of the air outlets in order to avoid the deviation of the blowing air volume caused by the swirling flow due to the rotation of the air blowing fan.

The reference numerals in parentheses attached to each component, etc., shows an example of a relationship of the specific component such as described in the following embodiments and their components, and the like.

FIG. 2 is a schematic cross-sectional view showing a schematic configuration of a vehicle air conditioning unit in the first embodiment. FIG. 2 is a cross-sectional view showing a II-II cross section in FIG. 1 and is a view showing a schematic shape of a rectifying mechanism of the first embodiment. In 1st Embodiment, while showing a ventilation fan with a dashed-two dotted line, it is the perspective view which extracted and showed the rectification mechanism. It is the figure which showed the comparative example in which the rectification mechanism of 1st Embodiment is not provided, Comprising: It is sectional drawing corresponded in FIG. In 2nd Embodiment, it is a schematic cross section which showed schematic structure of the air conditioning unit for vehicles, Comprising: It is a figure corresponded in FIG. In 3rd Embodiment, it is a schematic cross section which showed schematic structure of the air conditioning unit for vehicles, Comprising: It is a figure corresponded in FIG. In 3rd Embodiment, it is the perspective view which showed the general | schematic shape of the evaporator which the air-conditioning unit for vehicles has by itself. It is the enlarged view which looked at the VIII part in FIG. 7 from the vehicle rear side. It is the figure which showed the general | schematic shape of the rectification | straightening mechanism of 4th Embodiment, Comprising: It is sectional drawing corresponded in FIG. In 4th Embodiment, it is the perspective view which extracted and showed the ventilation mechanism while showing a ventilation fan with a dashed-two dotted line, Comprising: It is a figure corresponded in FIG. In 5th Embodiment, it is a schematic cross section which showed schematic structure of the air conditioning unit for vehicles, Comprising: It is a figure corresponded in FIG. In 6th Embodiment, it is a schematic sectional drawing which showed schematic structure of the air-conditioning unit for vehicles, Comprising: It is sectional drawing corresponded in FIG. FIG. 13 is a cross-sectional view showing a schematic shape of the rectifying mechanism of the sixth embodiment and showing a XIII-XIII cross section in FIG. 12, which is a cross-sectional view corresponding to FIG. 2. In 6th Embodiment, while showing a ventilation fan with a dashed-two dotted line, it is the perspective view which extracted and showed the rectification mechanism. FIG. 13 is a cross-sectional view showing a schematic shape of the rectifying mechanism of the seventh embodiment and showing a XIII-XIII cross section in FIG. 12, which is a cross-sectional view corresponding to FIG. 13. FIG. 15 is a perspective view showing a blower fan by a two-dot chain line and extracting a flow straightening mechanism in the seventh embodiment, corresponding to FIG. 14; FIG. 13 is a cross-sectional view showing a schematic shape of the rectifying mechanism of the eighth embodiment and showing a XIII-XIII cross section in FIG. 12, which is a cross-sectional view corresponding to FIG. 13. FIG. 15 is a perspective view showing a blower fan by a two-dot chain line and extracting a flow straightening mechanism in the eighth embodiment, corresponding to FIG. 14; FIG. 13 is a cross-sectional view showing a schematic shape of the flow straightening mechanism of the ninth embodiment, and showing a cross section taken along line XIII-XIII in FIG. 12, corresponding to FIG. 2; FIG. 13 is a cross-sectional view showing a schematic shape of the rectifying mechanism of the tenth embodiment and showing a XIII-XIII cross section in FIG. 12, and is a cross-sectional view corresponding to FIG. FIG. 13 is a cross-sectional view showing a schematic shape of the rectifying mechanism of the eleventh embodiment, and showing a cross section taken along line XIII-XIII in FIG. 12, corresponding to FIG. FIG. 18 is a cross-sectional view showing a schematic shape of the rectifying mechanism of the twelfth embodiment, and showing a cross section taken along line XIII-XIII in FIG. 12, corresponding to FIG. FIG. 19 is a perspective view selectively showing a rectifying mechanism in the twelfth embodiment, which corresponds to FIG. 18; FIG. 23 is a cross sectional view showing a cross section along line XXIV of FIG. 22. FIG. 25 is a cross sectional view showing a schematic shape of a rectifying mechanism in a thirteenth embodiment, which corresponds to FIG. 24. FIG. FIG. 25 is a cross sectional view showing a schematic shape of a rectifying mechanism in a fourteenth embodiment, corresponding to FIG. 24.

Hereinafter, each embodiment will be described with reference to the drawings. In the following embodiments, parts identical or equivalent to each other are denoted by the same reference numerals in the drawings.

First Embodiment
As shown in FIG. 1, the vehicle air conditioning unit 10 according to this embodiment includes an air conditioning case 12, an evaporator 16, a heater core 18, a blower 20, a plurality of doors 21, 22, 23, 24 a, 24 b, 25, and a rectifying mechanism. It has 26. The vehicle air conditioning unit 10 is disposed, for example, inside an instrument panel provided at the foremost part in the vehicle compartment. Arrows DR1, DR2 and DR3 in FIG. 1 and FIG. 2 indicate the direction of the vehicle on which the vehicle air conditioning unit 10 is mounted. That is, the arrow DR1 in FIG. 1 indicates the vehicle longitudinal direction DR1, the arrow DR2 indicates the vehicle vertical direction DR2, and the arrow DR3 in FIG. 2 indicates the vehicle lateral direction DR3, that is, the vehicle width direction DR3. These directions DR1, DR2, and DR3 are directions intersecting each other, strictly speaking, directions orthogonal to each other.

The air conditioning case 12 is a resin member that forms the outer shell of the vehicle air conditioning unit 10. The air conditioning case 12 is formed with an outside air inlet 121, an inside air inlet 122, and outlets 126, 127, 128 for blowing out air from the inside of the air conditioning case 12. Further, an in-case passage 123 through which air flows from one or both of the outside air inlet 121 and the inside air inlet 122 to the outlets 126, 127, 128 is formed inside the air conditioning case 12. The in-case passage 123 is formed to extend in the vehicle longitudinal direction DR1.

The outside air introduction port 121 is an introduction port for introducing outside air, which is air outside the vehicle compartment, into the passage 123 in the case. The inside air introduction port 122 is an introduction port for introducing inside air, which is air in the vehicle compartment, into the passage 123 in the case. Outside air or inside air is introduced into the air conditioning case 12 by the blower 20.

The outside air introduction port 121 and the inside air introduction port 122 are opened and closed by the inside / outside air switching door 25. Then, the air introduced from one or both of the outside air inlet 121 and the inside air inlet 122 flows into the evaporator 16.

The evaporator 16 is a cooling heat exchanger that cools the air passing through the evaporator 16. In short, the evaporator 16 is a cooler.

The evaporator 16 is housed in the air conditioning case 12. That is, the evaporator 16 is disposed in the in-case passage 123, and is disposed so that the outside air or the inside air introduced into the in-case passage 123 flows in. The evaporator 16, together with a compressor, a condenser, and an expansion valve (not shown), constitutes a known refrigeration cycle apparatus for circulating a refrigerant. The evaporator 16 exchanges heat between the air passing through the evaporator 16 and the refrigerant, and the heat exchange evaporates the refrigerant and cools the air.

The blower 20 has a blower fan 201 that rotates around a fan axis CL1 and is disposed in the in-case passage 123, and a fan motor (not shown) that rotationally drives the blower fan 201. The blower fan 201 is a centrifugal fan in the present embodiment. The blower 20, which is a centrifugal blower, sucks air from one side of the axial direction DRa of the fan axis line CL1 by the rotation of the blower fan 201, and blows the sucked air outward in the radial direction of the blower fan 201. The air blown out radially outward is guided by the air conditioning case 12 to the air flow downstream side of the in-case passage 123 (for example, the vehicle rear side in FIG. 1) as indicated by an arrow FLf.

More specifically, the blower fan 201, which is a centrifugal fan, is provided on one side of the axial direction DRa of the fan axis line CL1 and sucks in the air; a fan air inlet 201a; And an outlet 201b. The fan air outlet 201 b is formed over the entire circumference of the outer peripheral portion of the blower fan 201. Then, the blower fan 201 sucks air from one side of the axial direction DRa through the fan air inlet 201 a by the rotation of the blower fan 201. At the same time, the blower fan 201 blows the sucked air from the fan air outlet 201 b radially outward of the blower fan 201.

Therefore, in the air conditioning case 12, a fan surrounding space 123 b surrounding the air blowing fan 201 outside the air blowing fan 201 in the radial direction and into which the air flows from the air blowing fan 201 is formed as a part of the in-case passage 123. . The air conditioning case 12 is configured to guide the air flowing from the blower fan 201 into the fan surrounding space 123b to the other side opposite to one side of the axial direction DRa. For example, a wind guiding wall (not shown) disposed on one side of the axial direction DRa with respect to the fan surrounding space 123 b is provided in the air conditioning case 12. Then, the air conditioning case 12 guides the air in the fan surrounding space 123b to flow to the other side while blocking the flow to one side of the axial direction DRa by the air guide wall.

Thus, the air blown out from the blower fan 201 radially outward enters the fan surrounding space 123b as indicated by an arrow FLf, and the air from the fan surrounding space 123b to the other side of the axial direction DRa with respect to the blower fan 201 is conditioned. It is guided by the case 12.

In the present embodiment, the axial direction DRa of the fan axis line CL1 coincides with the vehicle longitudinal direction DR1. Further, the axial direction DRa of the fan axial line CL1 is also referred to as a fan axial direction DRa. Further, the radial direction of the blower fan 201 is, in other words, the radial direction of the fan axis line CL1. The radial direction of the fan axis line CL1 is also referred to as a fan radial direction.

The blower 20 has a so-called suction layout in which a blower fan 201 is disposed downstream of the evaporator 16 in the air flow. The blower 20 is disposed such that one side of the fan axial direction DRa, which is the air suction side of the blower fan 201, faces the air outflow surface 16b of the evaporator 16. Accordingly, the blower fan 201 is disposed in such a direction that the other side of the fan axial line CL1 opposite to one side of the fan axial direction DRa extends to the air flow downstream side of the case internal passage 123. In other words, the blower fan 201 is arranged such that the other side of the fan axis line CL1 is directed to extend toward the air flow downstream side of the in-case passage 123 (specifically, the vehicle rear side).

In detail, the blower 20 is disposed such that the fan axis CL1 is substantially orthogonal to the air outflow surface 16b of the evaporator 16. Therefore, the other side of the fan axis line CL1 extends in the direction (specifically, the vehicle rear side) in which the fan downstream portion 123a of the in-case passage 123, which is the portion of the air flow downstream of the air blowing fan 201 extends. The fan 201 is arranged. That is, the air flow blown out from the blower fan 201 proceeds to the other side in the fan axial direction DRa in the case internal passage 123.

The heater core 18 is disposed downstream of the blower fan 201 in the in-case passage 123 on the air flow downstream side. The heater core 18 is disposed at a central portion in the vehicle vertical direction DR2 of the in-case passage 123. The heater core 18 is a heater that heats the air passing through the heater core 18 among the air flowing through the in-case passage 123.

In the air conditioning case 12, an upper bypass passage 125 a is formed on the upper side of the heater core 18, and a lower bypass passage 125 b is formed on the lower side of the heater core 18. The upper bypass passage 125 a and the lower bypass passage 125 b are both included in the case inner passage 123, and flow air in parallel to the heater core 18. That is, both the upper bypass passage 125 a and the lower bypass passage 125 b are bypass passages that allow air to bypass the heater core 18. In other words, both the upper bypass passage 125 a and the lower bypass passage 125 b are non-heating passages where the heater core 18 is not provided.

A first air mix door 24 a and a second air mix door 24 b are provided on the air flow upstream side of the heater core 18 in the case inner passage 123. The first air mix door 24 a and the second air mix door 24 b are provided on the downstream side of the air flow with respect to the flow straightening mechanism 26.

The air mixing doors 24 a and 24 b are provided on the other side of the straightening mechanism 26 in the fan axial direction DRa in terms of the position of the fan axial direction DRa. The heater core 18 and the bypass passages 125a and 125b are provided on the other side in the fan axial direction DRa with respect to the air mix doors 24a and 24b.

The first air mix door 24a is disposed in the upper bypass passage 125a, and opens and closes the upper bypass passage 125a. The first air mix door 24a is a sliding door mechanism, and is slid by an electric actuator (not shown).

Then, the first air mix door 24 a adjusts the air volume ratio between the air volume passing through the heater core 18 and the air volume passing through the upper bypass passage 125 a according to the slide position.

The second air mix door 24b is disposed in the lower bypass passage 125b, and opens and closes the lower bypass passage 125b. The second air mix door 24 b is a sliding door mechanism, and is slid by an electric actuator (not shown).

Then, the second air mix door 24b adjusts the air volume ratio between the air volume passing through the heater core 18 and the air volume passing through the lower bypass passage 125b according to the slide position.

The air-conditioning case 12 is formed with a face outlet 126, a defroster outlet 127, and a foot outlet 128 for blowing air out of the air-conditioning case 12. The face outlet 126, the defroster outlet 127, and the foot outlet 128 are respectively connected to the in-case passage 123 on the downstream side of the heater core 18 and the bypass passages 125a and 125b.

Air flowing out of the face outlet 126 is guided through a duct (not shown) and blown out to the face or chest of an occupant seated in the front seat in the vehicle compartment. Air flowing out of the defroster outlet 127 is guided through a duct (not shown) and blown out toward the window glass on the front of the vehicle in the vehicle compartment. Air flowing out of the foot outlet 128 is guided through a duct (not shown) and blown out to the foot of an occupant seated in the front seat in the vehicle compartment.

Further, a face door 21 is provided at the face outlet 126, and the face door 21 opens and closes the face outlet 126. A defroster door 22 is provided at the defroster outlet 127, and the defroster door 22 opens and closes the defroster outlet 127. The foot outlet 128 is provided with a foot door 23, and the foot door 23 opens and closes the foot outlet 128.

At the air flow downstream side of the heater core 18 in the case internal passage 123, the warm air passing through the heater core 18 and the cold air passing through the upper bypass passage 125a are mixed. Then, the mixed air is blown out into the vehicle cabin mainly from an open one of the face outlet 126 and the defroster outlet 127.

Further, on the air flow downstream side of the heater core 18, the warm air passing through the heater core 18 and the cold air passing through the lower bypass passage 125b are mixed. Then, the mixed air is blown out mainly from the foot outlet 128 into the vehicle compartment when the foot outlet 128 is open.

As shown in FIGS. 1 and 2, a plurality of face outlets 126 are provided in the air conditioning case 12. For example, when the air outlet mode of the vehicle air conditioning unit 10 is set to the face mode, the face outlet 126 is opened, and the defroster outlet 127 and the foot outlet 128 are closed. Therefore, in this case, the air having passed through the flow straightening mechanism 26 disposed on the upstream side of the air flow from the face outlet 126 is distributed and flows into each of the plurality of face outlets 126. The air passing through the flow straightening mechanism 26 is not distributed to the defroster outlet 127 and the foot outlet 128 which are closed. That is, the plurality of outlets through which the air having passed through the flow straightening mechanism 26 as described herein is distributed and flows in are, specifically speaking, a plurality of outlets which are simultaneously opened in any of the outlet modes. .

Further, as shown in FIG. 2, the plurality of face air outlets 126 are disposed in a partial range Wf of the entire circumference around the fan axis line CL1 in the circumferential direction DRc of the fan axis line CL1. For example, the plurality of face air outlets 126 are all disposed above the fan axis line CL1. The plurality of face air outlets 126 are not arranged concentrically around the fan axis line CL1 but arranged linearly in the vehicle width direction DR3. The circumferential direction DRc of the fan axis line CL1 is also referred to as a fan circumferential direction DRc. Further, in FIG. 2, in order to show the positional relationship between the plurality of face outlets 126 and the blower fan 201, the outlines of the plurality of face outlets 126 and the blower fan 201 are indicated by two-dot chain lines. This is the same in FIGS. 4 and 9 described later.

In addition, the fact that the plurality of face outlets 126 described above are disposed in the partial range Wf means, strictly speaking, a connecting portion in which the plurality of face outlets 126 are connected to the in-case passage 123 Is arranged in the range Wf.

As shown in FIGS. 1 and 2, the flow straightening mechanism 26 is disposed downstream of the air flow fan with respect to the blower fan 201 in the case internal passage 123, and the air flow to the heater core 18 and the air mix doors 24a and 24b. It is located upstream. Therefore, air blown out from the blower fan 201 flows into the flow straightening mechanism 26, and the blown out air passes through the flow straightening mechanism 26 and then flows to the bypass passage 125 a, 125 b or the heater core 18. Further, speaking of the position in the fan axial direction DRa, the rectifying mechanism 26 is provided on the other side of the blower fan 201 in the fan axial direction DRa.

Here, since the blower fan 201 is disposed so that the other side of the fan axial direction DRa faces the air flow downstream side of the case internal passage 123, the air blown out from the blower fan 201 and flowing into the rectifying mechanism 26 is The rotation of the blower fan 201 produces a swirling flow. The rectifying mechanism 26 suppresses the swirling flow generated by the rotation of the blower fan 201 in the air blown out from the blower fan 201 as compared with the situation in which the blown-out air flows into the rectifying mechanism 26.

Also, if the upper bypass passage 125a is open, the air passing through the rectification mechanism 26 flows to the upper bypass passage 125a, and if the lower bypass passage 125b is open, the air passing through the rectification mechanism 26 is on the lower side. It flows to the bypass passage 125b. Therefore, focusing on the bypass passages 125a and 125b, the following can be said with regard to the suppression of the swirling flow. That is, the flow straightening mechanism 26 makes the swirling flow of the air flowing through the bypass passages 125 a, 125 b out of the air blown out from the blower fan 201 before the air flowing through the bypass passages 125 a, 125 b flows into the flow straightening mechanism 26. It suppresses by comparison.

Specifically, as shown in FIGS. 1 to 3, the flow straightening mechanism 26 has a plurality of flow straightening plates 261 extending from the inside to the outside in the radial direction of the blower fan 201 (ie, in the radial direction of the fan). The plurality of rectifying plates 261 are fixed to the air conditioning case 12 respectively. That is, the flow straightening mechanism 26 is fixed to the air conditioning case 12 and is provided as a non-rotating member that does not rotate.

The plurality of rectifying plates 261 are spaced apart from one another in the fan circumferential direction DRc. Therefore, a straightening passage 26a is formed between the plurality of straightening vanes 261, and each straightening passage 26a can flow air from the upstream side of the air flow to the straightening mechanism 26 in the case inner passage 123 to the downstream side of the air flow. It is assumed. In short, one end and the other end of the straightening passage 26a in the fan axial direction DRa are also open. In FIG. 3, the outline of the blower fan 201 is indicated by a two-dot chain line, which is the same as in FIG. 10 described later.

Further, as shown in FIG. 2 and FIG. 3, the mutual distance between the plurality of rectifying plates 261 in the fan circumferential direction DRc is wider toward the outside in the fan radial direction. The plurality of straightening vanes 261 may be provided in a simple radial manner, but in the present embodiment, they are not simple radial. That is, the plurality of flow control plates 261 in the present embodiment are formed to be positioned on the forward direction side in the rotational direction RTf of the blower fan 201 as it goes to the outer side in the fan radial direction.

Further, the plurality of flow straightening plates 261 respectively have passage wall surfaces 261 a and 261 b facing the flow straightening passages 26 a on both sides in the plate thickness direction of the flow straightening plate 261. The passage wall surfaces 261a, 261b are formed along the fan axial direction DRa.

The rectifying plates 261 configured in this manner move the air flowing from the blower fan 201 into the rectifying passage 26 a from the air flow upstream side to the air flow downstream side with respect to the rectifying mechanism 26 in the case inner passage 123. Guide along. At this time, each straightening vane 261 guides the air while countering the fan circumferential direction DRc with respect to the swirling flow of the air flowing through the straightening passage 26a. Therefore, the flow straightening mechanism 26 suppresses the swirling flow of the blown air by letting the air blown out from the blower fan 201 pass through the flow straightening passage 26a.

Next, the operation of the vehicle air conditioning unit 10 will be described. When the blower 20 starts operating, air is introduced into the in-case passage 123 formed in the air conditioning case 12 via the outside air inlet 121 or the inside air inlet 122, as shown in FIG. The air introduced into the in-case passage 123 is cooled by the evaporator 16 and passes through the evaporator 16.

The air cooled by the evaporator 16 is sucked into the blower fan 201 of the blower 20, blown outward in the radial direction of the blower fan 201, and guided to the air flow downstream side of the case internal passage 123 by the air conditioning case 12.

Then, the air blown out from the blower fan 201 passes through the rectifying mechanism 26. The air that has passed through the flow straightening mechanism 26 warms up when passing through the heater core 18 and flows to the air flow downstream side of the heater core 18 and flows cold to the air flow downstream side of the heater core 18 when passing through the bypass passages 125a and 125b. . Then, the warm air and the cold air are mixed on the air flow downstream side of the heater core 18, and the mixed air is supplied from the air outlet of the face outlet 126, the defroster outlet 127, and the foot outlet 128 which are open. , It is blown out to the predetermined place in the vehicle interior.

As described above, according to the present embodiment, as shown in FIGS. 1 to 3, the rectifying mechanism 26 blows out the swirling flow generated by the rotation of the blowing fan 201 in the air blown out of the blowing fan 201. The air is suppressed as compared to before it flows into the flow straightening mechanism 26. Therefore, since the swirling flow is suppressed on the air flow downstream side with respect to the flow straightening mechanism 26, it is not necessary to excessively limit the arrangement of the plurality of face outlets 126 in consideration of the swirling flow. That is, it is possible to arrange a plurality of face outlets 126 without excessively restricting the arrangement of the face outlets 126 for avoiding deviation of the blowing air volume caused by the swirling flow due to the rotation of the blower fan 201. .

For example, as shown in the comparative example of FIG. 4, if there is no rectifying mechanism 26, the air passing through the bypass passages 125a and 125b has a plurality of face outlets while having a swirling flow generated by the rotation of the blower fan 201. It will reach 126. Then, in the face mode, the amount of air flowing into the outlets becomes smaller as the outlets of the plurality of face outlets 126 located on the forward direction side in the rotational direction RTf of the blower fan 201. Therefore, in the comparative example of FIG. 4, the deviation of the blowing air volume caused by the swirling flow due to the rotation of the blower fan 201 is generated among the plurality of face air outlets 126. In addition, arrow FLo of FIG. 4 represents the flow of the air which blows off from the ventilation fan 201 and has rotational flow.

On the other hand, in the present embodiment, before the blowout air of the blower fan 201 reaches the face outlet 126, the swirling flow generated in the blowout air is suppressed by the flow straightening mechanism 26 in advance. Therefore, as shown in FIG. 2, even if the plurality of face air outlets 126 are arranged in a partial range Wf of the entire circumference around the fan axis line CL1 in the fan circumferential direction DRc, the deviation of the blowing air volume is more than one It is possible to prevent the occurrence of mutual between the face outlets 126 of the air conditioner.

In addition, since the swirling component included in the flow velocity of the blowing air of the blower fan 201 is canceled by the straightening plate 261 of the flow straightening mechanism 26, a uniform flow can be made on the air flow downstream side of the flow straightening mechanism 26. And by cancellation of the turning component, it becomes symmetrical air flow in the direction orthogonal to fan axial direction DRa, and it is possible to equalize wind speed distribution. As a result, it is possible to improve the wind distribution and temperature control at each face outlet 126.

Further, according to the present embodiment, as shown in FIG. 1, the heater core 18 is disposed downstream of the air blowing fan 201 in the case internal passage 123 and heats the air. The in-case passage 123 includes bypass passages 125a and 125b that allow air to flow around the heater core 18. Then, the flow straightening mechanism 26 makes the swirling flow of the air flowing through the bypass passages 125a and 125b among the air blown out from the blower fan 201 before the air flowing through the bypass passages 125a and 125b flows into the flow straightening mechanism 26. It suppresses by comparison. Therefore, it is possible to cause the rectifying mechanism 26 to effectively exhibit the action of suppressing the swirl flow with respect to the air flowing through the bypass passages 125a and 125b having few factors that weaken the swirl flow.

Further, according to the present embodiment, as shown in FIG. 1, the rectifying mechanism 26 is disposed upstream of the heater core 18 in the in-case passage 123 with respect to the air flow. Therefore, the air blown out from the blower fan 201 flows into the heater core 18 after the swirling flow is suppressed by the flow straightening mechanism 26. Therefore, it is possible to reduce pressure loss when air flows into the heater core 18.

Further, according to the present embodiment, as shown in FIGS. 1 to 3, the rectifying mechanism 26 has a plurality of rectifying plates 261 extending from the inside to the outside in the fan radial direction. A straightening passage 26a is formed between the plurality of straightening vanes 261 so that air can flow from the upstream side of the air flow to the straightening mechanism 26 in the case internal passage 123 to the downstream side of the air flow. The mutual distance between the plurality of current plates 261 is wider toward the outside in the radial direction of the fan. Then, the flow straightening mechanism 26 suppresses the swirling flow by causing the air blown out from the blower fan 201 to pass through the flow straightening passage 26 a.

Here, the air from the blower fan 201 flows into the flow straightening passage 26a, but the flowed air in the flow straightening passage 26a moves to the air flow downstream side while moving outward in the radial direction of the fan. Therefore, in the straightening passage 26a, even if the flow rate of air flowing through the straightening passage 26a is maintained, the flow velocity of the air decreases in accordance with the spread of the mutual spacings of the plurality of straightening plates 261. And the suppression of the said rotational flow advances with the fall of the flow velocity. Therefore, it is possible to reduce the pressure loss resulting from the suppression of the swirling flow.

Further, according to the present embodiment, as shown in FIG. 2 and FIG. 3, each of the plurality of rectifying plates 261 is formed to be positioned on the forward direction side in the rotational direction RTf of the blower fan 201 as it goes outward in the fan radial direction It is done. Therefore, for example, as compared with the case where the respective straightening vanes 261 extend straight along the radial direction of the blower fan 201, it is possible to reduce the pressure loss caused by suppressing the swirling flow. This is because, as the air including the swirling flow moves outward in the radial direction of the fan, the flow direction of the air can be gently diverted toward the air flow downstream of the in-case passage 123.

Further, according to the present embodiment, as shown in FIGS. 2 and 3, the straightening vane 261 has passage wall surfaces 261a, 261b facing the flow straightening passage 26a, and the passage wall surfaces 261a, 261b are in the fan axial direction DRa. It is formed along the. Therefore, it is possible to guide the air flow in the direction along the fan axial direction DRa as shown by arrow FL1 in FIG. 3 while suppressing the swirling flow generated by the rotation of the blower fan 201.

Second Embodiment
Next, a second embodiment will be described. In the present embodiment, points different from the first embodiment described above will be mainly described. In addition, the same or equivalent parts as those of the above-described embodiment will be described with omission or simplification. The same applies to the description of the embodiments described later.

As shown in FIG. 5, the vehicle air conditioning unit 10 of the present embodiment includes a filter 28 that filters the air blown out from the blower fan 201. In the present embodiment, the filter 28 is provided as a rectifying mechanism 26 in place of the rectifying mechanism 26 having a plurality of rectifying plates 261 shown in FIG.

Therefore, as in the case of the rectifying mechanism 26 of the first embodiment, the filter 28 of the present embodiment filters the swirling flow generated by the rotation of the blowing fan 201 in the air blown out of the blowing fan 201, the blown air being a filter Compared to before entering the 28 suppress.

Further, as in the case of the flow straightening mechanism 26 of the first embodiment, the filter 28 is disposed downstream of the air blowing fan 201 in the case inner passage 123 with respect to the air flow. The filter 28 is disposed upstream of the bypass passages 125a and 125b, the heater core 18, and the air mix doors 24a and 24b.

The filter 28 of the present embodiment is made of, for example, a net or non-woven fabric.

The present embodiment is the same as the first embodiment except for the above description. And in this embodiment, the effect show | played from the structure common to above-mentioned 1st Embodiment can be acquired similarly to 1st Embodiment.

Further, according to the present embodiment, the filter 28 for filtering the air blown out from the blower fan 201 is provided as the rectifying mechanism 26. Therefore, it is possible to reduce the number of parts by utilizing the filter 28 of the vehicle air conditioning unit 10 as the rectification mechanism 26.

Third Embodiment
Next, a third embodiment will be described. In the present embodiment, points different from the first embodiment described above will be mainly described.

As shown in FIG. 6, in the vehicle air conditioning unit 10 of the present embodiment, the order of the evaporator 16 and the blower 20 in the case internal passage 123 is reversed. Thus, in the present embodiment, the evaporator 16 is provided as the rectifying mechanism 26 in place of the rectifying mechanism 26 having the plurality of rectifying plates 261 shown in FIG.

Therefore, the evaporator 16 of the present embodiment is disposed downstream of the air flow fan with respect to the blower fan 201 in the in-case passage 123, similarly to the flow straightening mechanism 26 of the first embodiment. The evaporator 16 is disposed upstream of the bypass passages 125a and 125b, the heater core 18, and the air mix doors 24a and 24b.

With this arrangement, the evaporator 16 has the swirling flow generated by the rotation of the blower fan 201 in the air blown out of the blower fan 201 in the same manner as the rectifying mechanism 26 of the first embodiment. Compared to before entering the 16 to suppress.

Specifically, as shown in FIGS. 6 to 8, the evaporator 16 includes a plurality of refrigerant tubes 161 through which a refrigerant for cooling air flows, and a plurality of refrigerant tubes arranged between the refrigerant tubes 161. And corrugated fins 162. The plurality of refrigerant tubes 161 and the plurality of corrugated fins 162 are alternately stacked. For example, they are stacked in the vehicle width direction DR3. Due to this stacked arrangement, the evaporator 16 is formed with a plurality of heat exchange passages 163 penetrating in the fan axial direction DRa.

Therefore, in the evaporator 16, the air blown out from the blower fan 201 passes through the plurality of heat exchange passages 163. Then, the evaporator 16 cools the air passing through the plurality of heat exchange passages 163 by the refrigerant in the refrigerant tube 161.

And since the plurality of heat exchange passages 163 are passages which are respectively penetrated and subdivided in the fan axial direction DRa, the air blown out from the blower fan 201 passes through the heat exchange passages 163 to suppress the swirling flow. Be done.

The present embodiment is the same as the first embodiment except for the above description. And in this embodiment, the effect show | played from the structure common to above-mentioned 1st Embodiment can be acquired similarly to 1st Embodiment.

Further, according to the present embodiment, the evaporator 16 configured to cool the air passing through the plurality of heat exchange passages 163 is formed by forming the plurality of heat exchange passages 163 through which the air blown out from the blower fan 201 passes. It is provided as Therefore, it is possible to reduce the number of parts by utilizing the evaporator 16 of the vehicle air conditioning unit 10 also as the rectifying mechanism 26.

Fourth Embodiment
Next, a fourth embodiment will be described. In the present embodiment, points different from the first embodiment described above will be mainly described.

As shown in FIGS. 9 and 10, in the vehicle air conditioning unit 10 of the present embodiment, the rectifying mechanism 26 has a plurality of rectifying plates 261 as in the first embodiment, and is fixed to the air conditioning case 12. . However, in the present embodiment, the shape of the rectifying mechanism 26 is different from that of the first embodiment.

Specifically, in the present embodiment, each of the plurality of straightening vanes 261 is in the form of a linearly extending rib. The plurality of straightening vanes 261 are connected to one another to form a lattice as a whole. Therefore, the plurality of rectifying plates 261 define a plurality of rectifying passages 26a. For example, the plurality of straightening passages 26a are provided side by side in the vehicle vertical direction DR2 and also provided side by side in the vehicle width direction DR3.

In the straightening passages 26a, air can flow from the upstream side of the air flow to the straightening mechanism 26 in the case internal passage 123 to the downstream side of the air flow. In short, one end and the other end of the straightening passage 26a in the fan axial direction DRa are also open.

As in the first embodiment, each of the plurality of flow straightening plates 261 has passage wall surfaces 261a and 261b facing the flow straightening passages 26a on both sides in the plate thickness direction of the flow straightening plate 261. The passage wall surfaces 261a, 261b are formed along the fan axial direction DRa.

With such a configuration, the flow straightening mechanism 26 suppresses the swirling flow by causing the air blown out from the blower fan 201 to pass through the flow straightening passage 26a as shown by arrow FL1 in FIG. Therefore, in the present embodiment, it is possible to suppress the swirling flow by making the rectifying mechanism 26 a simple structure.

The present embodiment is the same as the first embodiment except for the above description. And in this embodiment, the effect show | played from the structure common to above-mentioned 1st Embodiment can be acquired similarly to 1st Embodiment.

Fifth Embodiment
Next, a fifth embodiment will be described. In the present embodiment, points different from the first embodiment described above will be mainly described.

As shown in FIG. 11, in the vehicle air conditioning unit 10 of the present embodiment, the fan axial line CL1 is inclined with respect to the vehicle longitudinal direction DR1, so the fan axial direction DRa does not coincide with the vehicle longitudinal direction DR1. In this respect, the present embodiment is different from the first embodiment.

As described above, the fan axial line CL1 is inclined with respect to the vehicle longitudinal direction DR1. However, in the blower fan 201 of the present embodiment, the other side of the fan axial line CL1 extends to the air flow downstream side of the case internal passage 123 It is arranged. In this respect, the present embodiment is the same as the first embodiment.

The present embodiment is the same as the first embodiment except for the above description. And in this embodiment, the effect show | played from the structure common to above-mentioned 1st Embodiment can be acquired similarly to 1st Embodiment.

Although this embodiment is a modification based on the first embodiment, it is also possible to combine this embodiment with any of the second, third and fourth embodiments described above.

Sixth Embodiment
Next, a sixth embodiment will be described. In the present embodiment, points different from the first embodiment described above will be mainly described.

As shown in FIG. 12, in the vehicle air conditioning unit 10 of the present embodiment, the face air outlet 126 and the defroster air outlet 127 are provided to be shifted upward as compared with the first embodiment. Further, as shown in FIG. 13 and FIG. 14, in the present embodiment, the structure of the rectifying mechanism 26 is different from that of the first embodiment.

Note that, in FIG. 13, in order to show the positional relationship between the plurality of face outlets 126 and the blower fan 201, the outlines of the plurality of face outlets 126 and the blower fan 201 are indicated by two-dot chain lines. . The same applies to FIGS. 15, 19, 20 and 21 described later.

Specifically, as shown in FIGS. 13 and 14, in the present embodiment, the rectifying mechanism 26 has a plurality of cylindrical portions 262 oriented along the fan axial direction DRa. And since the cylindrical part 262 is cylindrical shape, the through-hole 262a extended in the fan axial direction DRa is formed in the cylindrical part 262, respectively.

The plurality of cylindrical portions 262 are provided such that the respective through holes 262 a are arranged in parallel to one another. And the rectification | straightening mechanism 26 is comprised by the cylindrical part 262 comrades which mutually adjoin among several cylindrical parts 262 mutually become integral structure.

In detail, the through holes 262a of the cylindrical portion 262 have the same size. Each of the through holes 262a is a hexagonal hole whose cross section orthogonal to the fan axial direction DRa forms a hexagonal shape. Therefore, the flow straightening mechanism 26 of the present embodiment is configured as a honeycomb-shaped porous material. Further, since the plurality of cylindrical portions 262 are two-dimensionally arranged in the direction orthogonal to the fan axial direction DRa, the rectifying mechanism 26 is formed to form a plate shape with the fan axial direction DRa in the thickness direction. ing. The rectifying mechanism 26 is formed so as to extend over the entire in-case passage 123 in a cross section orthogonal to the fan axial direction DRa. The peripheral portion of the rectifying mechanism 26 is joined to the air conditioning case 12.

The rectifying mechanism 26 configured in this manner suppresses the swirling flow by causing the air blown out from the blower fan 201 to pass through the plurality of through holes 262a as shown by arrow FL1 in FIG. Therefore, it is possible to shorten the distance necessary for the rectification of the air flow while well securing the rectification property of suppressing and rectifying the swirling flow. Therefore, it is possible to reduce the thickness of the flow straightening mechanism 26 in the air flow direction.

Further, according to the present embodiment, the through hole 262a of the cylindrical portion 262 is a hole in which a cross section orthogonal to the fan axial direction DRa forms a hexagonal shape. In short, the flow straightening mechanism 26 of the present embodiment is configured as a honeycomb porous material. Therefore, the plurality of cylindrical portions 262 in which the through holes 262 a are formed can be easily disposed precisely, and the rigidity of the air conditioning case 12 can be enhanced by the flow straightening mechanism 26.

The present embodiment is the same as the first embodiment except for the above description. And in this embodiment, the effect show | played from the structure common to above-mentioned 1st Embodiment can be acquired similarly to 1st Embodiment.

Although this embodiment is a modification based on the first embodiment, it is also possible to combine this embodiment with the above-described fifth embodiment.

Seventh Embodiment
Next, a seventh embodiment will be described. In the present embodiment, points different from the sixth embodiment described above will be mainly described.

As shown in FIGS. 15 and 16, in the present embodiment, the through holes 262 a formed in each of the plurality of cylindrical portions 262 are circular holes whose cross section orthogonal to the fan axial direction DRa has a circular shape. Except for this, the present embodiment is the same as the sixth embodiment. And in this embodiment, the effect show | played from the structure common to above-mentioned 6th Embodiment can be acquired similarly to 6th Embodiment. The vehicle air conditioning unit 10 of the present embodiment is as shown in FIG. 12, which is the same as in the eighth to fourteenth embodiments described later.

Eighth Embodiment
An eighth embodiment will now be described. In the present embodiment, points different from the sixth embodiment described above will be mainly described.

As shown in FIGS. 17 and 18, through holes 262 a extending in the fan axial direction DRa are formed in each of the plurality of cylindrical portions 262. In this respect, the present embodiment is the same as the sixth embodiment. However, in the present embodiment, the hole shape of the through hole 262a formed in each of the plurality of cylindrical portions 262 is different from that of the sixth embodiment.

Specifically, in the present embodiment, the plurality of through holes 262a are rectangular holes each having a rectangular cross section orthogonal to the fan axial direction DRa. The rectangular shape of the cross section of the through hole 262a may be a strict rectangle or a square, and if it has a substantially rectangular shape, for example, any or all of the four sides surrounding the cross section of the through hole 262a The side of may be curved.

The portion of the air conditioning case 12 surrounding the rectifying mechanism 26 is formed in a cylindrical shape centered on the fan axis line CL1. The plurality of through holes 262 a formed in the rectifying mechanism 26 are arranged radially in the fan radial direction. Therefore, a plurality of rows of through holes 262a aligned in the fan circumferential direction DRc are formed concentrically around the fan axis CL1. The circumferential partition walls 263 separating the through holes 262a adjacent to each other in the fan circumferential direction DRc are provided so as to extend radially in the fan radial direction.

Further, in addition to the circumferential partition 263, the flow straightening mechanism 26 has a radial partition 267 separating the through holes 262a adjacent in the fan radial direction. The diameter partition wall 267 has a cylindrical shape centered on the fan axis CL1. Each of the circumferential partition wall 263 and the radial partition wall 267 has a plate-like shape, and functions as a partition plate that divides between the through holes 262a adjacent to each other among the plurality of through holes 262a.

Explaining in detail, the air conditioning case 12 is a part of the inner wall surface forming the in-case passage 123, and faces the portion of the in-case passage 123 where the rectifying mechanism 26 is disposed from the outside in the fan radial direction. It has a face 123f. The rectifying mechanism peripheral surface 123 f is formed so that a cross section orthogonal to the fan axial direction DRa forms a circular shape centering on the fan axis line CL 1 and surrounds the rectifying mechanism 26.

And as shown in FIG. 17 and FIG. 18, the plurality of through holes 262a provided in the rectifying mechanism 26 are arranged along the rectifying mechanism peripheral surface 123f of the air conditioning case 12 so as to be lined around the fan axis CL1. .

Further, in the cross section orthogonal to the fan axial direction DRa, the shapes of the plurality of through holes 262a each have a rectangular shape as described above, but they are exactly as shown in FIG. That is, the cross-sectional shape of the plurality of through holes 262a is a shape surrounded by the inner arc portion 262g, the outer arc portion 262h, the one side linear portion 262i, and the other side linear portion 262j.

Then, in the cross section orthogonal to the fan axial direction DRa, the inner arc portion 262g has an arc shape centering on the fan axial line CL1. Further, the outer arc portion 262 h is provided on the outer side in the fan radial direction with respect to the inner arc portion 262 g and has an arc shape concentric with the inner arc portion 262 g. Further, one side linear portion 262i has a linear shape extending in the fan radial direction toward fan axis line CL1 which is the center of blower fan 201, and connects one end of inner arc portion 262g and one end of outer arc portion 262h. It is. Further, the other side straight portion 262j has a linear shape extending in the fan radial direction toward the fan axis line CL1, and connects the other end of the inner arc portion 262g and the other end of the outer arc portion 262h. The inner arc portion 262g, the outer arc portion 262h, the one side straight portion 262i, and the other side straight portion 262j respectively constitute a hole wall surface facing the through hole 262a.

The plurality of through holes 262a having such a shape form an annular through hole group 262k in which the through holes 262a are arranged annularly around the fan axial line CL1 via the circumferential partition wall 263. A plurality of annular through hole groups 262k are formed concentrically around the fan axial line CL1 and provided adjacent to each other in the fan radial direction via the diameter partition 267. For example, in the present embodiment, two annular through holes 262k are provided.

Further, the plurality of through holes 262a provided in the flow straightening mechanism 26 are all formed such that the passage cross sectional areas of the through holes 262a are the same. Since the through hole 262a is a hole extending in the fan axial direction DRa, the passage cross sectional area of the through hole 262a is a cross sectional area of the through hole 262a in a cross section orthogonal to the fan axial direction DRa.

Each of the plurality of circumferential partitions 263 has a plate shape extending with a constant thickness, and the plurality of circumferential partitions 263 are formed such that the thickness of the circumferential partitions 263 is the same for all of the circumferential partitions 263. ing. Furthermore, the radial partition 267 also has a plate shape extending with a constant thickness. The radial partition 267 is formed such that the thickness of the radial partition 267 is the same as the thickness of the circumferential partition 263.

The rectifying mechanism 26 configured as described above suppresses the swirling flow by causing the air blown out from the blower fan 201 to pass through the plurality of through holes 262a.

The present embodiment is the same as the sixth embodiment except for the points described above. And in this embodiment, the effect show | played from the structure common to above-mentioned 6th Embodiment can be acquired similarly to 6th Embodiment.

Further, according to the present embodiment, each of the plurality of through holes 262a formed in the rectifying mechanism 26 is a rectangular hole having a rectangular cross section orthogonal to the fan axial direction DRa. The plurality of through holes 262a are arranged radially in the fan radial direction. Therefore, when the shape of the portion of the air conditioning case 12 in which the rectifying mechanism 26 is disposed is made cylindrical according to the outer shape of the blower fan 201 as in the present embodiment, the passage cross-sectional areas of the plurality of through holes 262a are made uniform. Cheap. Therefore, for example, the variation of the wind speed distribution of the air passing through the rectifying mechanism 26 can be suppressed, and the wind speed distribution can be adjusted. And if the variation in the wind speed distribution is suppressed, the disturbance of the wind flow on the downstream side of the air flow with respect to the rectifying mechanism 26 is also suppressed.

Further, according to the present embodiment, as shown in FIG. 17 and FIG. 18, the air conditioning case 12 faces from the outside in the radial direction of the fan to the portion of the in-case passage 123 where the rectifying mechanism 26 is disposed. It has a face 123f. The rectifying mechanism peripheral surface 123 f is formed such that a cross section orthogonal to the fan axial direction DRa forms a circular shape centered on the fan axis line CL 1 and surrounds the rectifying mechanism 26. Further, the plurality of through holes 262 a provided in the rectifying mechanism 26 are arranged along the rectifying mechanism peripheral surface 123 f of the air conditioning case 12 so as to be aligned around the fan axis line CL 1. Then, the flow straightening mechanism 26 suppresses the swirling flow by causing the air blown out from the blower fan 201 to pass through the plurality of through holes 262a.

Here, the swirling flow is suppressed by the air flow constituting the swirling flow being along the wall surface of each hole facing the through hole 262 a of the flow control mechanism 26.

The plurality of through holes 262a are arranged side by side around the fan axis CL1 as described above. Therefore, the wall surface of each through hole 262a which suppresses the swirling flow is the wall surface direction relative to the swirling direction of the swirling flow (specifically, the direction toward the fan circumferential direction DRc) whichever through hole It is easy to form each through-hole 262a so that it may be made the same also in 262a.

Therefore, it is easy to equalize the ventilation resistance of the rectifying mechanism 26 throughout the rectifying mechanism 26 while maintaining the rectifying property of the rectifying mechanism 26. And if the ventilation resistance can be made uniform, the disturbance of the wind flow can be suppressed, so that the pressure loss of the wind flow can be reduced.

Furthermore, according to the present embodiment, the plurality of through holes 262a are all formed such that the cross-sectional areas of the through holes 262a are the same. The radial partition 267 and the plurality of circumferential partitions 263 are formed such that the plate thickness of the partitions 263 and 267 is the same for all of the partitions 263 and 267. Therefore, it can be said from these things that the ventilation resistance of the rectifying mechanism 26 can be made uniform throughout the rectifying mechanism 26.

The ninth embodiment
Next, a ninth embodiment will be described. In the present embodiment, points different from the first embodiment described above will be mainly described.

As shown in FIGS. 12 and 19, in the present embodiment, as in the first embodiment, the rectifying mechanism 26 has a plurality of rectifying plates 261 extending from the inside to the outside in the fan radial direction. The plurality of face air outlets 126 are arranged at a position deviated from the fan axis CL1 to one side in a predetermined arrangement direction DRy which is one direction orthogonal to the fan axis CL1. For example, the predetermined arrangement direction DRy is not limited to the vehicle vertical direction DR2, but in the present embodiment, it coincides with the vehicle vertical direction DR2, one side of the predetermined arrangement direction DRy is the upper side, and the other side of the predetermined arrangement direction DRy is the lower It is the side.

Further, as shown in FIG. 19, the plurality of face air outlets 126 are provided side by side in the air outlet line alignment direction DRx intersecting with the fan axial direction DRa. For example, the blower outlet alignment direction DRx is not limited to the vehicle width direction DR3, but in the present embodiment, it matches the vehicle width direction DR3.

Further, the air conditioning case 12 has a plurality of air outlet boundaries 126a, and the air outlet boundary 126a is provided between the face air outlets 126 adjacent to each other among the plurality of face air outlets 126, The outlets 126 are separated from each other. Expressed in detail, the outlet boundary 126a is provided between the connecting portions of the face outlet 126 connected to the in-case passage 123, and separates the connecting portions.

Further, the plurality of flow straightening plates 261 each have an outer end portion 261 c at the outer end in the fan radial direction. Furthermore, any one of the plurality of outer end portions 261c is provided as one side end portion 261d located on one side of the position of the fan axis CL1 in the predetermined arrangement direction DRy. Each one side end portion 261 d is located radially outward with respect to the blower fan 201.

In the points described above, the present embodiment is the same as the first embodiment. In addition to this, unlike the first embodiment, in the present embodiment, the positions of the outlet boundary 126a in the outlet alignment direction DRx are aligned with the positions of the one side end 261d of the straightening vane 261, respectively. The fact that the position of the outlet boundary 126a matches the position of the one side end 261d does not necessarily mean that the positions completely match each other, and it may be that they substantially match. . The same applies to the embodiments described later.

The present embodiment is the same as the first embodiment, except for the points described as different from the first embodiment as described above. And in this embodiment, the effect show | played from the structure common to above-mentioned 1st Embodiment can be acquired similarly to 1st Embodiment.

Further, according to the present embodiment, the position of the outlet boundary 126 a of the air conditioning case 12 in the outlet alignment direction DRx is aligned with the position of the one side end 261 d of the flow control plate 261. Therefore, as compared with the case where the position of the outlet boundary 126a is disposed independently of the position of the one end 261d, the wind is directed smoothly to the plurality of face outlets 126, and the plurality of face outlets 126 are arranged. It is possible to improve the distribution of winds evenly. For example, the rectifying mechanism 26 can be provided with a function as a wind direction guide that directs the wind toward each of the plurality of face air outlets 126 as indicated by an arrow FLa in FIG. 19.

Although this embodiment is a modification based on the first embodiment, it is also possible to combine this embodiment with the above-described fifth embodiment.

Tenth Embodiment
Next, a tenth embodiment will be described. In the present embodiment, differences from the above-described fourth embodiment will be mainly described.

As shown in FIGS. 12 and 20, in the vehicle air conditioning unit 10 of the present embodiment, the face outlet 126 and the defroster outlet 127 are provided to be shifted upward as compared with the fourth embodiment.

In this respect, the present embodiment differs from the fourth embodiment, but is otherwise the same as the fourth embodiment. That is, in the present embodiment, as in the fourth embodiment, the rectifying mechanism 26 has a rectifying plate 261 that defines a plurality of rectifying passages 26a. The plurality of face outlets 126 are provided as described in the ninth embodiment, and the air conditioning case 12 has a plurality of outlet boundaries 126a as described in the ninth embodiment.

Further, any one of the plurality of rectifying plates 261 is provided as a predetermined rectifying plate 261 e formed so as to extend from one side to the other side in the predetermined arrangement direction DRy. The predetermined rectifying plate 261e has one side end 261d at one end of the predetermined arrangement direction DRy, and the one side end 261d is one side of the position of the fan axis CL1 in the predetermined arrangement direction DRy. It is located in

Further, as described in the ninth embodiment, the positions of the outlet boundary 126a in the outlet alignment DRx are aligned with the positions of the one side end 261d of the predetermined straightening vane 261e. In the above point, the present embodiment is the same as the fourth embodiment.

In the present embodiment, the same advantages as those of the fourth embodiment can be obtained from the configuration common to the fourth embodiment described above.

Further, according to the present embodiment, as in the ninth embodiment, the position of the outlet boundary 126a of the air conditioning case 12 in the outlet alignment direction DRx is aligned with the position of the one side end 261d. Therefore, as in the ninth embodiment, the wind can be smoothly directed to the plurality of face outlets 126 as indicated by an arrow FLa, and the wind distribution to the plurality of face outlets 126 can be improved.

Although the present embodiment is a modification based on the fourth embodiment, it is also possible to combine this embodiment with the above-described fifth embodiment.

Eleventh Embodiment
An eleventh embodiment will now be described. In the present embodiment, points different from the sixth embodiment described above will be mainly described.

As shown in FIGS. 12 and 21, in the present embodiment, as in the sixth embodiment, the flow straightening mechanism 26 has a rectangular plate shape and is configured as a honeycomb porous material in which a plurality of through holes 262a are formed. It is done. The plurality of face outlets 126 are provided as described in the ninth embodiment, and the air conditioning case 12 has a plurality of outlet boundaries 126a as described in the ninth embodiment.

Further, as shown in FIG. 21, the rectangular flow straightening mechanism 26 has an edge 264 extending in the air outlet alignment direction DRx on one side of the predetermined arrangement direction DRy. The edge part 264 is comprised by the cylindrical part 262f of some cylindrical parts 262 being located in a line in the blower outlet alignment direction DRx.

The present embodiment is the same as the sixth embodiment in the points described above. In addition to this, in the present embodiment, unlike the sixth embodiment, in the edge portion 264, the through holes 262a which are within the range of the outlet width Wx of each of the face outlets 126 in the outlet alignment direction DRx The numbers are equal to one another when the respective blower outlet widths Wx are compared with one another. In FIG. 21, the number of the through holes 262 a which fall within the range of each outlet width Wx is approximately two.

In addition, said blower outlet width Wx is the width which each of several face blower outlet 126 occupies in the blower outlet row direction DRx if it says in detail. In the present embodiment, the outlet width Wx of each face outlet 126 is, for example, the same for any of the face outlets 126.

Further, the number of the through holes 262a falling within the above-mentioned range of the outlet width Wx is not limited to an integer but may be a small number. For example, if half of the through holes 262a are within the outlet width Wx, the number of the through holes 262a is 0.5. Further, as described above, the fact that the numbers of the through holes 262a are equal to each other does not necessarily mean that the numbers completely match, but it may be that they are substantially the same.

The present embodiment is the same as the sixth embodiment except for the point described as different from the sixth embodiment as described above. And in this embodiment, the effect show | played from the structure common to above-mentioned 6th Embodiment can be acquired similarly to 6th Embodiment.

Further, according to the present embodiment, in the edge portion 264 of the flow straightening mechanism 26, the number of the through holes 262a in the range of the outlet width Wx of each of the face outlets 126 in the outlet alignment direction DRx The outlet widths Wx are mutually equal when compared with each other. Therefore, as compared with the case where the through holes 262a included in the edge portion 264 of the flow straightening mechanism 26 are disposed regardless of the outlet width Wx, the variation of the air volume ratio of the air flowing to each face outlet 126 is suppressed. Is possible.

Although this embodiment is a modification based on the sixth embodiment, it is also possible to combine this embodiment with the seventh embodiment described above.

(Twelfth embodiment)
The twelfth embodiment will now be described. In the present embodiment, differences from the above-described eighth embodiment will be mainly described.

As shown in FIGS. 22 to 24, the rectifying mechanism 26 of the present embodiment is disposed in the other side portion 265 provided on the other side of the fan axial direction DRa with respect to the blower fan 201 and in the fan surrounding space 123b. And a fan surrounding portion 266.

The fan surrounding portion 266 is formed to extend from the other side portion 265 to one side of the fan axial direction DRa, and is integrally configured with the other side portion 265. Specifically, the plurality of through holes 262 a formed in the rectifying mechanism 26 respectively extend in the fan axial direction DRa continuously from the other side portion 265 to the fan surrounding portion 266. Accordingly, the fan surrounding portion 266 guides the air blown out from the fan air outlet 201b of the blower fan 201 to the other side portion 265 as indicated by an arrow FLf in FIG.

Further, the fan surrounding portion 266 is formed so as to extend from the other side portion 265 in the fan axial direction DRa to the inside of the fan surrounding space 123b as it extends to the outer side in the fan radial direction. In other words, the fan peripheral portion 266 has one end 266f on one side in the fan axial direction DRa, and the one end 266f is positioned on one side in the fan axial direction DRa toward the fan radial direction. Is formed.

The present embodiment is the same as the eighth embodiment except as described above. And in this embodiment, the effect show | played from the structure common to above-mentioned 8th Embodiment can be acquired similarly to 8th Embodiment.

Further, according to the present embodiment, the rectifying mechanism 26 includes the other side portion 265 provided on the other side in the fan axial direction DRa with respect to the blower fan 201, and the fan surrounding portion 266 arranged in the fan surrounding space 123b. have. Then, the fan surrounding portion 266 guides the air blown out from the fan air outlet 201b of the blower fan 201 to the other side portion 265 as indicated by an arrow FLf in FIG. Therefore, as compared with the case where the flow straightening mechanism 26 does not have the fan surrounding portion 266, the flowability distribution of air flowing from the blower fan 201 into the flow straightening mechanism 26 is made uniform while securing the straightening performance of the flow straightening mechanism 26 better. It is easy to

(13th Embodiment)
The thirteenth embodiment will now be described. In the present embodiment, differences from the above-described twelfth embodiment will be mainly described.

As shown in FIG. 25, in the present embodiment, the fan surrounding portion 266 of the rectifying mechanism 26 has circumferential ribs 266 a. The fan surrounding portion 266 may have components other than the circumferential rib 266a, but in the present embodiment, the fan surrounding portion 266 is composed of only the circumferential rib 266a.

The circumferential rib 266a protrudes from the other side portion 265 to one side in the fan axial direction DRa and extends in the fan circumferential direction DRc (see FIG. 22). The circumferential rib 266a extends continuously over the entire circumference around the fan axis line CL1, for example, as indicated by a two-dot chain line Lc in FIG. The length of the dashed-two dotted line Lc indicates the range in which the circumferential rib 266a is provided in the fan circumferential direction DRc.

Further, as shown in FIG. 25, the circumferential rib 266a is located at a position away from the peripheral case surface 123c (in other words, the fan peripheral surface 123c) provided around the fan peripheral space 123b in the fan radial direction. It is provided. In short, the circumferential rib 266a is arranged at an interval inward in the fan radial direction with respect to the peripheral case surface 123c. At the same time, the circumferential rib 266 a is provided on the outside in the radial direction of the fan with respect to the blower fan 201, and is arranged at an interval in the radial direction of the fan with respect to the blower fan 201. That is, in the flow straightening mechanism 26 of the present embodiment, through holes 262a as air passages are provided on either the outer side or the inner side with respect to the circumferential rib 266a in the fan radial direction. The peripheral case surface 123c is an inner wall surface of the air conditioning case 12 and is an inner wall surface facing the fan peripheral space 123b from the outside in the fan radial direction. The peripheral case surface 123c is not connected continuously from the rectifying mechanism peripheral surface 123f, and for example, a cross section orthogonal to the fan axial direction DRa is formed to form a circular shape centered on the fan axial line CL1. .

The circumferential rib 266a has a tip 266b on one side in the fan axial direction DRa. The circumferential rib 266a is bent so as to be positioned more inward in the fan radial direction as it is closer to the tip end 266b.

Further, in the fan axial direction DRa, an end 201c on one side of the fan air outlet 201b is located on one side of the tip end 266b of the circumferential rib 266a.

The present embodiment is the same as the twelfth embodiment except as described above. Further, in the present embodiment, the same effects as those of the twelfth embodiment can be obtained from the configuration common to the twelfth embodiment described above.

Further, according to the present embodiment, the circumferential rib 266a is provided at a position away from the surrounding case surface 123c of the air conditioning case 12 facing the fan surrounding space 123b. Therefore, it is possible to adjust the volume of air flowing from the blower fan 201 radially outward of the circumferential rib 266a by the circumferential rib 266a. Thus, for example, the air volume distribution of the air flowing from the blower fan 201 into the flow straightening mechanism 26 can be easily made uniform in the fan radial direction.

Fourteenth Embodiment
A fourteenth embodiment will now be described. In the present embodiment, points different from the first embodiment described above will be mainly described.

As shown in FIG. 26, in the present embodiment, compared to the first embodiment, one side of the fan axial direction DRa such that the plurality of rectifying plates 261 of the rectifying mechanism 26 extend into the fan surrounding space 123b. It extends to In FIG. 26, the enlarged part of the rectifying plate 261 of the present embodiment as compared with the first embodiment is indicated by dot hatching.

Therefore, the rectifying mechanism 26 of the present embodiment also has the other side portion 265 and the fan surrounding portion 266 as in the twelfth embodiment. That is, in the present embodiment, each of the plurality of rectifying plates 261 includes the first plate portion 261 f included in the other side portion 265 and the second plate portion 261 g included in the fan surrounding portion 266. The first plate portion 261 f and the second plate portion 261 g are, for example, continuously and integrally configured without a boundary.

The second plate portion 261g has one end 261h on one side in the fan axial direction DRa. One end 261 h of the second plate portion 261 g is formed so as to be positioned on one side of the fan axial direction DRa toward the outer side in the fan radial direction. The one end 261 h of the second plate portion 261 g is also one end 266 f of the fan surrounding portion 266.

The present embodiment is the same as the first embodiment except for the above description. And in this embodiment, the effect show | played from the structure common to above-mentioned 1st Embodiment can be acquired similarly to 1st Embodiment.

Further, according to the present embodiment, as in the first embodiment, the rectifying mechanism 26 has a plurality of rectifying plates 261 extending from the inside to the outside in the fan radial direction. Therefore, it is possible to obtain the same function as the function of the rectifying plate 261 (see FIG. 2) of the first embodiment.

Further, in the rectifying mechanism 26 of the present embodiment, each of the plurality of rectifying plates 261 has a first plate portion 261 f included in the other side portion 265 and a second plate portion 261 g included in the fan surrounding portion 266. . Therefore, as in the twelfth embodiment, it is easy to achieve uniform air volume distribution of air flowing from the blower fan 201 into the flow straightening mechanism 26 while securing the flow straightening ability of the flow straightening mechanism 26 favorably.

(Other embodiments)
(1) As shown in FIG. 1 in the first embodiment described above, the rectifying mechanism 26 is disposed upstream of the bypass passages 125a and 125b and the heater core 18 in the air flow, but this is an example. For example, it may be conceivable that the rectifying mechanism 26 is disposed downstream of the bypass passages 125a and 125b and the heater core 18 in the air flow direction. The same applies to the second, fourth and fifth embodiments described above.

(2) As shown in FIG. 9 in the fourth embodiment described above, although the rectifying plates 261 are provided in a plurality and connected to each other, they may not be connected to each other, and one may be provided instead of a plurality. It may only be For example, in the case where the number of the straightening vanes 261 is one, the straightening vanes 261 form two straightening passages 26 a in the portion of the in-case passage 123 where the straightening mechanism 26 is disposed.

(3) In each of the embodiments described above, the blower fan 201 is a centrifugal fan as shown in FIG. 1, for example. However, the blower fan 201 is not limited thereto, and may be, for example, an axial fan or a mixed flow fan.

(4) In the above-described sixth embodiment, as shown in FIG. 12, the face outlet 126 and the defroster outlet 127 are shifted upward as compared with FIG. 1 of the first embodiment, but this is an example is there. The vertical position of the face outlet 126 and the defroster outlet 127 may be any position of FIG. 1 and FIG. 12, and is not limited to any position of FIG. 1 and FIG. . The same applies to the embodiments other than the sixth embodiment.

(5) As shown in FIG. 13 in the sixth embodiment described above, the through holes 262a of the plurality of cylindrical portions 262 have the same size, but the present invention is not limited thereto. It does not matter if through holes 262a of different sizes are included. That is, it is not necessary that all the passage cross-sectional areas of the plurality of through holes 262a have the same area. The same applies to the seventh and subsequent embodiments.

(6) In the sixth embodiment described above, as shown in FIG. 13, the plurality of through holes 262a are all hexagonal holes having the same cross-sectional shape, but this is an example. For example, the plurality of through holes 262a may include, for example, through holes 262a having a cross-sectional shape different from others, such as a circular hole. The same applies to the seventh and subsequent embodiments.

(7) In the above-described ninth embodiment, as shown in FIG. 19, the blowout port alignment direction DRx coincides with the vehicle width direction DR3, so it is a direction along a straight line extending in the vehicle width direction DR3. The outlet alignment direction DRx may be a direction along a curved curve. The same applies to the embodiments other than the ninth embodiment.

(8) In the above-described tenth embodiment, as shown in FIG. 20, any one of the plurality of rectifying plates 261 is formed to extend from one side to the other side in the predetermined arrangement direction DRy. , But this is an example. For example, the whole of the rectifying plate 261 may be provided as the predetermined rectifying plate 261 e.

(9) In the above-described thirteenth embodiment, the circumferential rib 266a in FIG. 25 extends continuously all around the fan axis CL1, but this is an example. For example, the circumferential rib 266a may be provided intermittently over the entire circumference of the fan axis line CL1. Alternatively, the circumferential rib 266a may be provided only in a part around the fan axis CL1.

(10) In the eighth embodiment described above, as shown in FIG. 17, the sectional shapes of the plurality of through holes 262a are the inner arc portion 262g, the outer arc portion 262h, the one side linear portion 262i, and the other side linear portion 262j. Although it is the shape enclosed by these, this is an example. For example, the cross-sectional shapes of the plurality of through holes 262a may be trapezoidal.

(11) In the eighth embodiment described above, as shown in FIG. 17, the radial partition 267 is formed so that the plate thickness of the radial partition 267 is the same as the plate thickness of the circumferential partition 263, but Not limited to this, it can be considered that the thickness of the diameter partition 267 is different from the thickness of the peripheral partition 263. It is also conceivable that the radial partition 267 does not have a plate shape extending with a constant thickness.

The plurality of circumferential partition walls 263 are formed so that the plate thickness of the circumferential partition walls 263 is the same for all the circumferential partition walls 263, but this is also an example. For example, it can be considered that the plurality of circumferential partition walls 263 included in the rectifying mechanism 26 include the circumferential partition walls 263 having a plate thickness different from the others. In addition, it can be considered that the circumferential partition wall 263 does not have a plate shape extending with a constant thickness.

(12) Note that the present disclosure is not limited to the above-described embodiment, and can be variously modified and implemented. Moreover, said each embodiment is not mutually irrelevant and can be combined suitably, unless the combination is clearly impossible. Further, in each of the above-described embodiments, it is needless to say that the elements constituting the embodiment are not necessarily essential except when clearly indicated as being essential and when it is considered to be obviously essential in principle. Yes.

Further, in the above embodiments, when numerical values such as the number, numerical value, amount, range, etc. of constituent elements of the embodiment are mentioned, it is clearly indicated that they are particularly essential and clearly limited to a specific number in principle. It is not limited to the specific number except when it is done. Further, in the above embodiments, when referring to materials, shapes, positional relationships, etc. of constituent elements etc., unless specifically stated otherwise or in principle when limited to a specific material, shape, positional relationship, etc., etc. It is not limited to the material, the shape, the positional relationship, etc.

(Summary)
According to the first aspect of the present invention shown in part or all of the above embodiments, the flow straightening mechanism is configured such that the air blown out from the air blowing fan is generated in the swirling flow generated by the rotation of the air blowing fan. It suppresses compared with before flowing into the rectification mechanism.

Further, according to the second aspect, the heater is disposed downstream of the air flow fan with respect to the blower fan in the case internal passage, and heats the air. The in-case passage includes a bypass passage for flowing air around the heater. Then, the flow straightening mechanism suppresses the swirling flow of the air flowing in the bypass passage among the blown-out air, as compared with the case where the air flowing in the bypass flow passage flows into the flow straightening mechanism. Therefore, it is possible to make the rectifying mechanism effectively exhibit the action of suppressing the swirl flow with respect to the air flowing in the bypass passage which has few factors weakening the swirl flow.

Further, according to the third aspect, the rectifying mechanism is disposed upstream of the heater with respect to the heater in the passage in the case. Therefore, the air blown out from the blower fan flows into the heater after the swirling flow is suppressed by the rectifying mechanism. Therefore, it is possible to reduce pressure loss when air flows into the heater.

Further, according to the fourth aspect, the air conditioning case is formed with a plurality of outlets for blowing air out of the air conditioning case, and the air having passed through the rectifying mechanism is distributed to each of the plurality of outlets. Flow in. The plurality of air outlets are arranged in a partial range of the entire circumference around the fan axis in the circumferential direction of the fan axis.

Further, according to the fifth aspect, the rectifying mechanism has a plurality of rectifying plates extending from the inside to the outside in the radial direction of the blower fan. Between the plurality of straightening vanes, there is formed a straightening passage in which air can be circulated from the upstream side of the air flow to the straightening mechanism in the case internal passage to the downstream side of the air flow. The mutual spacing between the plurality of flow straightening plates is wider toward the outside in the radial direction. The rectification mechanism suppresses the swirling flow by causing the air blown out from the blower fan to pass through the rectification passage. Here, the air that has flowed into the straightening passage from the blower fan moves radially outward while flowing toward the air flow downstream side. Therefore, in the straightening passage, even if the flow rate of air flowing through the straightening passage is maintained, the flow velocity of the air is reduced according to the spread of the mutual spacings of the plurality of straightening vanes. And the suppression of the said rotational flow advances with the fall of the flow velocity. Therefore, it is possible to reduce the pressure loss resulting from the suppression of the swirling flow.

Further, according to the sixth aspect, each of the plurality of flow straightening vanes is formed to be positioned on the forward direction side in the rotation direction of the blower fan as it goes to the outer side in the radial direction. Therefore, for example, as the air including the swirling flow moves radially outward as compared with the case where the straightening vanes extend straight along the radial direction of the blower fan, the air flow direction is It is possible to gently turn the air flow downstream. Therefore, it is possible to reduce the pressure loss caused by suppressing the swirling flow.

Further, according to the seventh aspect, the rectifying mechanism has a rectifying plate that defines a plurality of rectifying passages. Each of the plurality of straightening passages is a passage in which air can flow from the upstream side of the air flow to the straightening mechanism in the in-case passage, to the downstream side of the air flow. The rectification mechanism suppresses the swirling flow by causing the air blown out from the blower fan to pass through the rectification passage. Therefore, it is possible to aim at suppression of a swirling flow as a simple structure of a rectification mechanism.

Further, according to the eighth aspect, the straightening vane has a passage wall surface facing the flow straightening passage, and the passage wall surface is formed along the axial direction of the fan axis. Therefore, it is possible to guide the air flow in the direction along the axial direction of the fan axis while suppressing the swirling flow generated by the rotation of the blower fan.

Further, according to the ninth aspect, a filter for filtering the air blown out from the blower fan is provided as a rectifying mechanism. Therefore, it is possible to reduce the number of parts by utilizing the filter of the air conditioning unit for vehicle as a rectifying mechanism.

Further, according to the tenth aspect, there are formed a plurality of passages through which the air blown out from the blower fan passes, and a cooling heat exchanger for cooling the air passing through the plurality of passages is provided as the rectification mechanism. . Therefore, it is possible to reduce the number of parts by utilizing the heat exchanger for cooling which the air conditioning unit for a vehicle has as a rectification mechanism.

Further, according to the eleventh aspect, the blower fan is a centrifugal fan.

Further, according to the twelfth aspect, the rectifying mechanism has a plurality of cylindrical portions in which the through holes extending in the axial direction are formed, and the plurality of cylindrical portions are arranged such that the respective through holes are parallel to each other. Provided to be Moreover, the rectification | straightening mechanism is comprised because the mutually adjacent cylindrical parts among several cylindrical parts become integral structure mutually. The rectification mechanism suppresses the swirling flow by causing the blown air to pass through the through hole. Therefore, it is possible to shorten the distance necessary for the rectification of the air flow while well securing the rectification property of suppressing and rectifying the swirling flow. Therefore, it is possible to reduce the thickness of the rectifying mechanism in the air flow direction.

Further, according to the thirteenth aspect, the through hole is a hole whose cross section orthogonal to the axial direction forms a hexagonal shape or a circular shape. Therefore, it is easy to arrange | position precisely the several cylindrical part in which the through-hole was formed, and it is possible to raise the rigidity of an air-conditioning case by a rectification mechanism.

Further, according to the fourteenth aspect, the through holes are holes whose cross sections orthogonal to the axial direction have a rectangular shape, and are arranged radially in the radial direction of the blower fan. Therefore, when the shape of the arrangement portion of the flow straightening mechanism in the air conditioning case is made cylindrical according to the outer shape of the blower fan, the passage cross sectional areas of the plurality of through holes can be easily made uniform and the wind speed of the air passing through the flow straightening mechanism It is possible to suppress the variation of the distribution and adjust the wind speed distribution.

Further, according to the fifteenth aspect, the air conditioning case has a flow control mechanism peripheral surface facing from the outer side in the radial direction of the blower fan in a portion of the passage in the case where the flow control mechanism is disposed. The rectifying mechanism peripheral surface is formed such that a cross section orthogonal to the axial direction has a circular shape centered on the fan axis and surrounds the rectifying mechanism. Further, a plurality of through holes extending in the axial direction are formed in the rectifying mechanism, and the plurality of through holes are arranged along the peripheral surface of the rectifying mechanism around the fan axis. The flow control mechanism suppresses the swirling flow by causing the blown air to pass through the plurality of through holes.

Here, the swirling flow is suppressed by the air flow constituting the swirling flow being along the wall of each hole facing the through hole of the flow straightening mechanism. And if a plurality of through holes are arranged as described above, the hole wall surface of each through hole for suppressing the turning flow is relative to the turning direction of the turning flow (specifically, the circumferential direction of the blower fan) It becomes easy to form each through-hole so that the wall surface direction which makes it similarly may be made the same in any through-hole. Therefore, it is easy to equalize the ventilation resistance of the rectifying mechanism throughout the rectifying mechanism while maintaining the rectifying property of the rectifying mechanism. And if the ventilation resistance can be made uniform, the disturbance of the wind flow can be suppressed, so that the pressure loss of the wind flow can be reduced.

Further, according to the sixteenth aspect, the plurality of through holes are formed such that the cross-sectional areas of the through holes are the same. Therefore, it is possible to more sufficiently equalize the ventilation resistance in the entire rectification mechanism as compared with the fifteenth aspect.

Further, according to the seventeenth aspect, the flow straightening mechanism has a plurality of partition plates that partition between adjacent ones of the plurality of through holes. And the some partition plate is formed so that the plate | board thickness of the partition plate may mutually become the same. Therefore, it is possible to more sufficiently equalize the ventilation resistance in the entire rectification mechanism as compared with the fifteenth aspect.

Further, according to the eighteenth aspect, the air conditioning case is formed with a plurality of air outlets disposed at a position shifted from the fan axis to one side in one direction orthogonal to the fan axis and blowing out the air to the outside of the air conditioning case There is. In addition, the flow straightening mechanism has an edge extending in the air outlet direction on one side of the one direction, and in the edge, a part of the plurality of cylindrical portions is in the air outlet direction It consists of being lined up. Further, at the edge, the number of the through holes that fall within the range of the outlet width occupied by each of the plurality of outlets in the outlet array direction is equal to each other when the respective outlet widths are compared with each other. Therefore, as compared with the case where the through holes included in the edge portion of the flow straightening mechanism are disposed independently of the width of the air outlet, it is possible to suppress the variation of the air volume ratio of the air flowing to each air outlet.

Further, according to the nineteenth aspect, the air conditioning case is formed with a plurality of outlets disposed at a position shifted from the fan axis to one side in one direction orthogonal to the fan axis and blowing out air to the outside of the air conditioning case There is. Further, any one of the outer end portions of the plurality of flow straightening plates is provided as one end portion located on one side of the position of the fan axis in the one direction. Further, the position of the outlet boundary in the outlet alignment direction is aligned with the position of the one side end. Therefore, compared with the case where the position of the outlet boundary is arranged independently of the position of the one side end, the winds are directed more smoothly to the plurality of outlets and the wind is sent evenly to the plurality of outlets. It is possible to improve windiness.

Further, according to the twentieth aspect, the air conditioning case is provided with a plurality of outlets for blowing air out of the air conditioning case, disposed at a position shifted from the fan axis to one side in one direction orthogonal to the fan axis. ing. Further, at least one of the plurality of flow straightening plates is provided as a predetermined flow straightening plate formed to extend from one side to the other side of the one direction. The predetermined straightening vane has one side end at one end of the one direction, and the one side end is positioned on one side of the position of the fan axis in the one direction. Further, the position of the outlet boundary in the outlet alignment direction is aligned with the position of the one side end. Therefore, similarly to the nineteenth aspect, it is possible to smoothly direct the wind to the plurality of outlets, and to improve the wind distribution to the plurality of outlets.

Further, according to the twenty-first aspect, the air blowing fan is a centrifugal fan which sucks in air from one side in the axial direction by the rotation of the air blowing fan and blows out the sucked air to the outside in the radial direction of the air blowing fan. The rectifying mechanism has the other side portion provided on the other side in the axial direction with respect to the blower fan, and the fan surrounding portion disposed in the fan surrounding space and guiding the air to the other side portion. Therefore, as compared with the case where the flow straightening mechanism does not have the fan surrounding portion, it is easy to achieve uniform air volume distribution of the air flowing from the blower fan into the flow straightening mechanism while securing the flow straightening of the flow straightening mechanism well.

Further, according to a twenty-second aspect, the fan surrounding portion of the flow straightening mechanism has a circumferential rib that protrudes from the other side portion to one side in the axial direction and extends in the circumferential direction of the fan axis. Further, the air conditioning case has a peripheral case surface facing the fan peripheral space, and the circumferential rib is provided at a position away from the peripheral case surface. Therefore, it is possible to adjust the air volume of the air which flows to the radial outside of a circumferential rib from a blower fan by a circumferential rib.

Further, according to a twenty-third aspect, the rectifying mechanism has a plurality of rectifying plates extending from the inside to the outside in the radial direction of the blower fan. Each of the plurality of rectifier plates has a first plate portion included in the other side portion of the rectifying mechanism, and a second plate portion included in the fan peripheral portion of the rectifying mechanism. Therefore, the same function as the function of the rectifying plate of the fifth aspect can be obtained, and similarly to the twenty-first aspect, the air flows from the blower fan into the rectifying mechanism while favorably securing the rectifying property of the rectifying mechanism. Makes it easy to make the distribution of air volume uniform.

Claims (23)

1. A vehicle air conditioning unit,
   An air conditioning case (12) having an in-case passage (123) through which air flows;
   It has a blower fan (201) which rotates around the fan axis (CL1) and is disposed in the passage in the case, and blows out the air drawn in from one side of the axial direction (DRa) of the fan axis by the rotation of the blower fan. A blower (20),
   A flow straightening mechanism (16, 26, 28) disposed downstream of the air flow fan with respect to the air flow fan in the case internal passage and through which the air blown out from the air flow fan passes;
   The blower fan is disposed in a direction in which the other side of the fan axial line opposite to the one side in the axial direction extends to the air flow downstream side of the passage in the case,
   The air conditioning unit for a vehicle, wherein the flow straightening mechanism suppresses a swirling flow generated by the rotation of the air blowing fan in the air blown out from the air blowing fan as compared to before the air blown out flows into the flow straightening mechanism. .
2. A heater (18) disposed on the downstream side of the air flow relative to the blower fan in the case internal passage, and heating the air;
   The in-case passage includes a bypass passage (125a, 125b) for flowing air around the heater.
   The flow straightening mechanism suppresses the swirling flow of air flowing in the bypass passage among the blown-out air, as compared to before air flowing in the bypass passage flows into the flow straightening mechanism. The air conditioning unit for vehicles as described in.
3. The air conditioning unit for a vehicle according to claim 2, wherein the flow straightening mechanism is disposed upstream of the heater with respect to the heater in the passage in the case.
4. The air conditioning case is formed with a plurality of outlets (126) for blowing air out of the air conditioning case,
   The air having passed through the flow straightening mechanism is distributed and flows into each of the plurality of outlets.
   The plurality of air outlets are arranged in a partial direction (Wf) of the entire circumference around the fan axis in the circumferential direction (DRc) of the fan axis. Air conditioning unit according to claim 1.
5. The rectifying mechanism (26) includes a plurality of rectifying plates (261) extending radially inward from the inside of the blower fan,
   Between the plurality of straightening vanes, a straightening passage (26a) is formed in which air can flow from the upstream side to the downstream side of the air flow to the straightening mechanism in the case internal passage,
   The distance between the plurality of straightening vanes is wider toward the outside in the radial direction,
   The air conditioning unit for a vehicle according to any one of claims 1 to 4, wherein the flow straightening mechanism suppresses the swirling flow by causing the blown air to pass through the flow straightening passage.
6. The air conditioning unit for a vehicle according to claim 5, wherein each of the plurality of straightening vanes is formed to be positioned on the forward direction side in the rotation direction (RTf) of the blower fan as it goes outward in the radial direction.
7. The rectifying mechanism (26) has a rectifying plate (261) defining a plurality of rectifying passages (26a),
   Each of the plurality of straightening passages is a passage in which air can flow from the upstream side to the downstream side of the air flow with respect to the straightening mechanism in the case internal passage,
   The air conditioning unit for a vehicle according to any one of claims 1 to 4, wherein the flow straightening mechanism suppresses the swirling flow by causing the blown air to pass through the flow straightening passage.
8. The straightening vane has passage wall surfaces (261a, 261b) facing the straightening passage,
   The air conditioning unit for a vehicle according to any one of claims 5 to 7, wherein the passage wall surface is formed along the axial direction.
9. The air conditioning unit for vehicles according to any one of claims 1 to 4, wherein a filter (28) for filtering the air blown out from the blower fan is provided as the rectifying mechanism.
10. A plurality of passages (163) through which air blown out from the blower fan is formed, and a cooling heat exchanger (16) for cooling air passing through the plurality of passages is provided as the rectification mechanism. The air conditioning unit for vehicles as described in any one of claim 1 to 4.
11. The air conditioning unit for vehicles according to any one of claims 1 to 10, wherein the blower fan is a centrifugal fan.
12. The rectification mechanism (26) has a plurality of cylindrical portions (262) in which the through holes (262a) extending in the axial direction are formed,
    The plurality of cylindrical portions are provided such that the respective through holes are arranged in parallel with each other,
    The flow straightening mechanism is configured such that adjacent cylindrical portions of the plurality of cylindrical portions are integrated with each other.
    The air conditioning unit for a vehicle according to any one of claims 1 to 3, wherein the flow straightening mechanism suppresses the swirling flow by letting the blown air pass through the through hole.
13. The air conditioning unit for a vehicle according to claim 12, wherein the through hole is a hole in which a cross section orthogonal to the axial direction forms a hexagonal shape or a circular shape.
14. The air conditioning unit for a vehicle according to claim 12, wherein the through hole is a hole in which a cross section orthogonal to the axial direction has a rectangular shape, and is radially arranged in the radial direction of the blower fan.
15. The air conditioning case has a flow control mechanism peripheral surface (123f) facing from the outer side in the radial direction of the blower fan in a portion of the passage in the case where the flow control mechanism is disposed;
    The rectifying mechanism peripheral surface is formed such that a cross section orthogonal to the axial direction has a circular shape centered on the fan axis and surrounds the rectifying mechanism.
    A plurality of through holes (262a) extending in the axial direction are formed in the rectifying mechanism,
    The plurality of through holes are arranged around the fan axis along the surface around the flow control mechanism,
    The air conditioning unit for a vehicle according to any one of claims 1 to 3, wherein the flow straightening mechanism suppresses the swirling flow by causing the blown air to pass through the plurality of through holes.
16. The vehicle air conditioning unit according to claim 15, wherein the plurality of through holes are formed such that the passage cross-sectional areas of the through holes are the same.
17. The flow straightening mechanism has a plurality of partition plates (263, 267) for partitioning between adjacent ones of the plurality of through holes,
    The vehicle air conditioning unit according to claim 15 or 16, wherein the plurality of partition plates are formed such that the plate thicknesses of the partition plates are equal to one another.
18. The air conditioning case is formed with a plurality of outlets (126) arranged at positions shifted from the fan axis to one side in one direction (DRy) orthogonal to the fan axis, and blowing air out of the air conditioning case.
    The air having passed through the flow straightening mechanism is distributed and flows into each of the plurality of outlets.
    The plurality of blower outlets are provided side by side in a blower outlet alignment direction (DRx) intersecting the axial direction,
    The flow straightening mechanism has an edge (264) extending in the air outlet direction, on one side of the one direction;
    The edge portion is configured such that some cylindrical portions (262f) of the plurality of cylindrical portions are arranged in the air outlet line-up direction,
    At the edge, the number of the through holes within the range of the outlet width (Wx) occupied by each of the plurality of outlets in the outlet alignment direction is the case where the respective outlet widths are compared with each other. Vehicle air conditioning unit according to claim 12 or 13, which is aligned with one another.
19. The rectifying mechanism (26) includes a plurality of rectifying plates (261) extending radially inward from the inside of the blower fan,
    Between the plurality of straightening vanes, a straightening passage (26a) is formed in which air can flow from the upstream side to the downstream side of the air flow to the straightening mechanism in the case internal passage,
    The rectification mechanism suppresses the swirling flow by causing the blown air to pass through the rectification passage;
    The air conditioning case is formed with a plurality of outlets (126) arranged at positions shifted from the fan axis to one side in one direction (DRy) orthogonal to the fan axis, and blowing air out of the air conditioning case.
    The air having passed through the flow straightening mechanism is distributed and flows into each of the plurality of outlets.
    The plurality of blower outlets are provided side by side in a blower outlet alignment direction (DRx) intersecting the axial direction,
    The air conditioning case has an outlet boundary (126a) provided between adjacent ones of the plurality of outlets, and separating the outlets.
    The plurality of straightening vanes each have an outer end (261c) at the radially outer end,
    Any one of the outer ends of the plurality of flow straightening plates is provided as one end (261d) positioned on the one side with respect to the position of the fan axis in the one direction,
    The vehicle air conditioning unit according to any one of claims 1 to 3, wherein the position of the outlet boundary in the outlet alignment direction matches the position of the one side end.
20. The rectifying mechanism (26) has a rectifying plate (261) defining a plurality of rectifying passages (26a),
    Each of the plurality of straightening passages is a passage in which air can flow from the upstream side to the downstream side of the air flow with respect to the straightening mechanism in the case internal passage,
    The rectification mechanism suppresses the swirling flow by causing the blown air to pass through the rectification passage;
    The air conditioning case is formed with a plurality of outlets (126) arranged at positions shifted from the fan axis to one side in one direction (DRy) orthogonal to the fan axis, and blowing air out of the air conditioning case.
    The air having passed through the flow straightening mechanism is distributed and flows into each of the plurality of outlets.
    The plurality of blower outlets are provided side by side in a blower outlet alignment direction (DRx) intersecting the axial direction,
    The air conditioning case has an outlet boundary (126a) provided between adjacent ones of the plurality of outlets, and separating the outlets.
    At least one of the plurality of rectifying plates is provided as a predetermined rectifying plate (261e) formed to extend from the one side to the other side of the one direction,
    The predetermined current plate has one side end (261d) at the one side end of the one direction,
    The one side end portion is positioned on the one side with respect to the position of the fan axis in the one direction,
    The vehicle air conditioning unit according to any one of claims 1 to 3, wherein the position of the outlet boundary in the outlet alignment direction matches the position of the one side end.
21. The blower fan is a centrifugal fan that sucks in air from the one side in the axial direction by the rotation of the blower fan and blows the sucked air outward in the radial direction of the blower fan.
    In the air conditioning case, a fan surrounding space (123b) surrounding the air blowing fan radially outward of the air blowing fan and into which air flows from the air blowing fan is formed as a part of the in-case passage.
    The air conditioning case is configured to lead air flowing from the blower fan into the space surrounding the fan to the other side opposite to the one side in the axial direction.
    The flow straightening mechanism includes a second portion (265) provided on the other side in the axial direction with respect to the blower fan, and a fan circumferential portion (266 that is disposed in the fan circumferential space and guides air to the other side. The vehicle air conditioning unit according to any one of claims 1 to 4, wherein
22. The fan peripheral portion has a circumferential rib (266a) projecting from the other side portion to the one side in the axial direction and extending in a circumferential direction (DRc) of the fan axis,
    The air conditioning case has a surrounding case surface (123c) facing the fan surrounding space;
    The vehicle air conditioning unit according to claim 21, wherein the circumferential rib is provided at a position separated from the peripheral case surface.
23. The rectifying mechanism (26) includes a plurality of rectifying plates (261) extending radially inward from the inside of the blower fan,
    Between the plurality of straightening vanes, a straightening passage (26a) is formed in which air can flow from the upstream side to the downstream side of the air flow to the straightening mechanism in the case internal passage,
    The rectification mechanism suppresses the swirling flow by causing the blown air to pass through the rectification passage;
    The plurality of straightening vanes according to claim 21, wherein each of the plurality of flow straightening plates has a first plate portion (261f) included in the other side portion and a second plate portion (261g) included in the fan surrounding portion. Air conditioning unit for vehicles.

Images