WO2018100962A1

WO2018100962A1 - Air conditioning device for vehicle

Info

Publication number: WO2018100962A1
Application number: PCT/JP2017/039647
Authority: WO
Inventors: 新美　和也
Original assignee: 株式会社デンソー
Priority date: 2016-11-29
Filing date: 2017-11-02
Publication date: 2018-06-07
Also published as: JP6662276B2; JP2018086940A

Abstract

The present disclosure provides an air conditioning device for a vehicle, the air conditioning device being capable of reducing blowing noise while suppressing a decrease in the amount of air blown into a passenger compartment. The air conditioning device for a vehicle is provided with: a blower unit (1) for sucking at least one of air located inside the passenger compartment and air located outside the passenger compartment and sending the air to a downstream side; and an air conditioning unit (2) for adjusting the temperature of the air blown from the blower unit with heat exchangers (20, 21) and blowing the temperature-adjusted air into the passenger compartment. The blower unit is disposed with an offset to one side in the vehicle width direction with respect to the air conditioning unit. The blower unit is provided with an inside/outside air switching unit (11) and a blower fan (123). The inside/outside air switching unit has an inside air introduction port (112) for introducing the air located inside the passenger compartment and an outside air introduction port (113) for introducing the air located outside the passenger compartment. The blower fan (123) is disposed on the air-flow downstream side of the inside/outside air switching unit and blows the air introduced from at least one of the inside air introduction port and the outside air introduction port to the downstream side. The inside air introduction port is provided with an air-flow guide unit (14) for guiding the air located in the passenger compartment toward the rotation center of the blower fan.

Description

Air conditioner for vehicles

Cross-reference of related applications

This application is based on Japanese Patent Application No. 2016-231414 filed on November 29, 2016, the contents of which are incorporated herein by reference.

The present disclosure relates to a vehicle air conditioner including a blower unit.

A blower unit of a vehicle air conditioner has an inside / outside air having an inside air introduction port for introducing vehicle interior air (hereinafter referred to as inside air) and an outside air introduction port for introducing outside air inside the vehicle compartment (hereinafter referred to as outside air). A switching device is provided.

In recent years, with the expansion of the opening area of the inside air introduction port, the blowing noise from the blower fan is directly discharged from the inside air introduction port to the vehicle interior when the air volume in the inside air mode is large, and the noise in the vehicle interior may increase.

On the other hand, Patent Document 1 discloses a vehicle air conditioner in which a sound insulation guide member for preventing noise emission from a blower fan is provided at a portion where the wind speed of the inside air inlet is low. With this sound insulation guide member, it is possible to prevent noise due to the operation of the blower fan from being directly emitted into the vehicle interior.

Japanese Patent Laid-Open No. 2001-71735

According to the study of the inventors of the present disclosure, in the technique described in Patent Document 1, a part of the inside air introduction port is blocked by the sound insulating guide member, so that the inside air suction resistance in the inside air mode increases. There is a possibility that the air flow rate will be reduced.

The present disclosure aims to provide a vehicle air conditioner that can reduce blowing noise while suppressing a decrease in the blowing amount of air in the passenger compartment.

An air conditioner for a vehicle according to an aspect of the present disclosure is configured to adjust the temperature of a blower unit that sucks at least one of vehicle interior air and vehicle exterior air and blows the air downstream, and air blown from the blower unit using a heat exchanger. And an air conditioning unit that blows out into the passenger compartment. The air blowing unit is offset from one side in the vehicle width direction with respect to the air conditioning unit. The blower unit includes an inside / outside air switching unit and a blower fan. The inside / outside air switching unit has an inside air introduction port for introducing vehicle interior air and an outside air introduction port for introducing vehicle exterior air. The blower fan is arranged on the downstream side of the air flow of the inside / outside air switching unit and blows air introduced from at least one of the inside air introduction port and the outside air introduction port to the downstream side. The inside air introduction port is provided with a wind guide portion that guides the cabin air toward the rotation center of the blower fan.

According to this, since the vehicle interior air is guided toward the rotation center of the blower fan by the wind guide portion, the air velocity distribution of the air sucked into the blower fan can be made uniform, and the blowing noise of the blower fan is reduced. it can. At this time, since the vehicle interior air is guided toward the rotation center of the blower fan by the air guide portion, it is possible to suppress the suction resistance from being increased by the air guide portion. Therefore, it is possible to reduce the blowing noise while suppressing a decrease in the blowing amount of the passenger compartment air.

It is a front view showing an indoor air-conditioning unit in an embodiment of this indication. It is a perspective view which shows the ventilation unit in embodiment. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. FIG. 4 is a sectional view taken along line IV-IV in FIG. 1. It is a front view which shows the rib in embodiment. It is explanatory drawing for demonstrating the wind speed distribution of ventilation fan suction air.

Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. In the figure, front, rear, up, down, left and right arrows indicate directions in a vehicle-mounted state.

As shown in FIG. 1, the vehicle air conditioner includes an indoor air conditioning unit having a blower unit 1 and an air conditioning unit 2. The blower unit 1 sucks at least one of the inside air (vehicle compartment air) and the outside air (vehicle compartment outside air) and blows it downstream. The air conditioning unit 2 adjusts the temperature of the air blown from the blower unit 1 by

heat exchangers

20 and 21 described later, and blows it out into the passenger compartment.

The blower unit 1 and the air conditioning unit 2 are arranged inside a vehicle instrument panel (not shown) at the foremost part of the passenger compartment.

The blower unit 1 is offset from the air conditioning unit 2 on one side in the vehicle width direction (that is, the vehicle left-right direction). More specifically, the air conditioning unit 2 is disposed at the approximate center in the vehicle width direction, and the air blowing unit 1 is disposed with a predetermined dimension away from the air conditioning unit 2 on the passenger seat side. Since FIG. 1 shows an example of a left-hand drive vehicle, the blower unit 1 is arranged on the right side with respect to the air conditioning unit 2.

As shown in FIGS. 2 and 3, the blower unit 1 includes an inside / outside air switching unit 11 that switches and introduces inside air or outside air, and a blower unit 12 that is disposed below the inside / outside air switching unit 11. .

The inside / outside air switching unit 11 has a resin casing 111 formed by integrally fastening left and right two-part casings. The casing 111 is formed with an inside air introduction port 112 for introducing inside air and an outside air introduction port 113 for introducing outside air. An inside / outside air switching door 114 that opens and closes both the

inlets

112 and 113 is housed in the casing 111 so as to be rotatable. The inside / outside air switching door 114 is a rotary door having an outer peripheral wall surface 116 that can rotate around a rotating shaft 115.

Here, as an operation mechanism for rotating the rotating shaft 115 of the inside / outside air switching door 114, an electric actuator composed of a servo motor is usually used, but an inside / outside air switching operation provided on an air conditioning control panel (not shown). You may use the manual operation mechanism which transmits the manual operation force of a member (for example, manual operation lever) to a drive lever via a cable, a link mechanism, etc.

Then, by opening / closing the inside / outside air switching door 114, any one of the outside air introduction mode, the inside air introduction mode, and the inside / outside air mode is performed as the suction port mode. The outside air introduction mode is a mode for opening the outside air introduction port 113, the inside air introduction mode is a mode for opening the inside air introduction port 112, and the inside and outside air mode is a mode for opening and closing the outside air introduction port 113 and the inside air introduction port 112, respectively. .

An air filter 117 is provided on the downstream side (the vehicle lower side) of the inside / outside air switching unit 11. The air filter 117 is configured to support a filter member made of corrugated (wavy) paper or porous urethane foam with a resin frame. Here, the air filter 117 removes dust in the air, and the overall shape thereof is a flat plate shape. In addition, you may enable it to exhibit a deodorizing function by adding the adsorbent which adsorb | sucks a malodorous component like activated carbon to a filter member as needed.

3 and 4, the blower unit 12 has a resin scroll casing 121. The scroll casing 121 is provided with a bell mouth-shaped inlet 122 located at the bottom (downstream part) of the inside / outside air switching unit 11.

A blower fan 123 composed of a centrifugal multiblade fan is disposed at the center of the scroll casing 121. The air sucked from the inlet 122 by the rotation of the blower fan 123 flows outward in the radial direction of the blower fan 123. That is, the blower fan 123 is arranged on the downstream side of the air flow of the inside / outside air switching unit 11 and blows air introduced from at least one of the inside air introduction port 112 and the outside air introduction port 113 downstream. The blower fan 123 is connected to a rotating shaft of a driving motor (not shown) and is driven to rotate.

The air conditioning unit 2 is connected to the air outlet of the scroll casing 121. As is well known, the air conditioning unit 2 includes a cooling heat exchanger 20, a heating heat exchanger 21, a temperature adjustment mechanism (not shown), a blowing mode switching mechanism (not shown), and the like. Therefore, after the air blown from the blower unit 12 is cooled, dehumidified, and reheated in the air conditioning unit 2 to adjust the temperature, it is blown out into the passenger compartment.

2 and 3, the inside air introduction port 112 of the inside / outside air switching unit 11 is provided with a lattice member 13 for suppressing foreign matter from entering the vehicle interior. The lattice member 13 has a plurality of arc-shaped portions 131 formed in a substantially arc shape passing through the upper end portion and the lower end portion of the inside air introduction port 112, and a plurality of rod-shaped portions 132 extending in the vehicle width direction. The plurality of arcuate portions 131 are arranged in parallel at intervals. The plurality of rod-shaped portions 132 are arranged in parallel with a space therebetween.

At least one of the plurality of rod-shaped portions 132 is provided with a rib 14 protruding toward the outside of the inside air introduction port 112. The rib 14 is formed so that a cross section orthogonal to the vehicle width direction is a straight line extending toward the rotation center of the blower fan 123. The rotation center of the blower fan 123 refers to the central portion 15 on the suction side (the vehicle upper side) of the blower fan 123.

For this reason, the inside air sucked from the inside air introduction port 112 flows along the rib 14 and heads toward the rotation center of the blower fan 123. Therefore, the rib 14 of the present embodiment constitutes an air guide portion that guides the inside air toward the rotation center of the blower fan 123.

As shown in FIGS. 2 and 5, the rib 14 is formed in a flat plate shape extending in the vehicle width direction. The rib 14 is provided over the entire area in the width direction of the inside air introduction port 112.

The two corners 141 that are not connected to the rod-shaped part 132 in the rib 14 are chamfered. That is, the two corner portions 141 not connected to the rod-shaped portion 132 in the rib 14 are formed in an arc shape that is convex toward the side far from the inside air introduction port 112.

2 and 3, the rib 14 is provided so as to be refracted with respect to the rod-shaped portion 132. That is, the ribs 14 are arranged so as to be inclined with respect to the rod-like portions 132 of the lattice member 13. The inclination angle of the rib 14 with respect to the rod-shaped portion 132 is in the range of more than 0 degree and less than 90 degrees when the state in which the rib 14 extends in the opening direction of the inside air introduction port 112 is 0 degree. The rib 14 extending in the opening direction of the inside air introduction port 112 means that the rib 14 extends in the radial direction of the arcuate portion 131 when viewed from the vehicle width direction.

The rib 14 is provided in the lower half region of the inside air introduction port 112. In the present embodiment, the rib 14 is provided on the two lower bar-shaped parts 132 among the plurality of bar-shaped parts 132.

FIG. 6 shows a wind speed distribution of the suction air of the blower fan 123 in the blower unit 1 of the present embodiment. FIG. 6B shows the wind speed distribution in the VI-VI cross section of FIG. The solid line in FIG.6 (b) has shown the wind speed distribution of the ventilation unit 1 (this embodiment) of Fig.6 (a). The broken line in FIG. 6B shows the wind speed distribution when the inside air inlet 112 is not provided with the rib 14 (comparative example).

As shown by the broken line in FIG. 6 (b), in the blower unit of the comparative example in which the rib 14 is not provided, there is a portion where the wind speed (flow velocity) of the intake air is slow on the vehicle rear side (inside air introduction port 112 side), Blowing noise is generated by the intake air of the blowing fan 123.

On the other hand, since the rib 14 is provided in the blower unit 1 of the present embodiment, the wind speed of the intake air can be increased on the vehicle rear side as shown by the solid line in FIG. Thereby, the air velocity of the air sucked into the blower fan 123 can be made uniform, and the blowing noise caused by the air sucked into the blower fan 123 can be reduced.

Further, in the present embodiment, the rib 14 is disposed so as to be inclined with respect to the rod-shaped portion 132 of the lattice member 13. According to this, it is possible to suppress the noise due to the operation of the blower fan 123 from being directly released into the vehicle interior by the rib 14. Therefore, the blowing noise of the blower fan 123 can be further reduced.

The present disclosure is not limited to the above-described embodiment, and can be variously modified as follows, for example, without departing from the spirit of the present disclosure.

In the above-described embodiment, the example in which the ribs 14 are provided on the two lower rod-shaped portions 132 of the plurality of rod-shaped portions 132 of the lattice member 13 has been described. However, the arrangement of the ribs 14 is not limited to this. For example, the ribs 14 may be provided on all of the plurality of rod-shaped parts 132.

In the above embodiment, an example in which the rib 14 is formed in a flat plate shape and is provided over the entire area in the width direction of the inside air inlet 112 has been described. However, the configuration of the rib 14 is not limited to this. For example, the rib 14 may be divided into a plurality in the vehicle left-right direction, and the plurality of ribs 14 may be arranged in series in the vehicle width direction.

Although the present disclosure has been described based on the embodiments, it is understood that the present disclosure is not limited to the embodiments and structures. The present disclosure includes various modifications and modifications within the equivalent range. In addition, although various combinations and forms are shown in the present disclosure, other combinations and forms including only one element, more or less than them are also included in the scope and concept of the present disclosure. Is.

Claims

A blower unit (1) that sucks at least one of vehicle interior air and vehicle exterior air and blows it downstream;
An air conditioning unit (2) for adjusting the temperature of the air blown from the blower unit by a heat exchanger (20, 21) and blowing the air into the passenger compartment,
The air blowing unit is arranged offset on one side in the vehicle width direction with respect to the air conditioning unit,
The air blowing unit is
An inside / outside air switching section (11) having an inside air introduction port (112) for introducing the vehicle interior air and an outside air introduction port (113) for introducing the vehicle compartment outside air;
A fan (123) that is disposed on the downstream side of the air flow of the inside / outside air switching unit, and that blows air introduced from at least one of the inside air introduction port and the outside air introduction port to the downstream side,
A vehicle air conditioner provided with an air guide section (14) for guiding the air in the vehicle interior toward the rotation center of the blower fan at the inside air inlet.
The inside air introduction port is provided with a lattice member (13) for suppressing foreign matter from entering the vehicle interior,
The vehicle air conditioner according to claim 1, wherein the air guide portion is provided on the lattice member.
The inclination angle of the air guide portion with respect to the lattice member is in the range of more than 0 degree and less than 90 degrees when the state in which the air guide part extends in the opening direction of the inside air inlet is 0 degree. The vehicle air conditioner according to claim 2.
The vehicle air conditioner according to any one of claims 1 to 3, wherein the air guide section is provided over the entire width direction of the inside air inlet.
The vehicle air conditioner according to any one of claims 1 to 4, wherein the air guide portion is provided in a lower half region of the inside air introduction port.