JP2819273B2 - Vehicle air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner mounted on a vehicle, and more particularly to a suction type air conditioner in which a fan is provided on an outlet side.

[0002]

2. Description of the Related Art As a conventional air conditioner, Japanese Utility Model No.
In JP-A-54748, an evaporator as a heat exchanger for cooling is arranged on the upstream side of an air conditioning duct, a heater core whose ventilation is adjusted by an air mixing door is arranged on the downstream side, and a blower is arranged on the most downstream side. Also disclosed is an air conditioner in which an outlet is formed in a casing of a blower.

Japanese Utility Model Laid-Open No. 63-155918 discloses an air conditioner having an indoor heat exchanger in a main body base and a sirocco fan opposed to the heat exchanger. It discloses that the casing is integrally formed by molding a synthetic resin, and a blow guide plate connected to a blower outlet on the indoor side is formed by a separate molded component on the blowout side of the fan casing.

[0004]

However, in the air conditioner disclosed in Japanese Utility Model Laid-Open No. 50-54848, a blower is disposed on the blow-out side, so that it passes through a cooling heat exchanger and is cooled. The blower unit is cooled by the blown air, and there is a problem that dew condensation occurs outside the casing of the blower unit.

Japanese Utility Model Laid-Open Publication No. Sho 63-155918 discloses that the fan casing itself of a sirocco fan is integrally formed by molding a synthetic resin, which is weak in strength. And the material cost increases.

Accordingly, an object of the present invention is to provide an air conditioner for a vehicle which has a simple structure and can prevent dew condensation on a casing of a blower unit.

[0007]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a heat exchange unit having a suction port, at least one heat exchanger disposed downstream of the suction port, and a downstream side of the heat exchange unit. And a blower unit having a fan disposed therein, wherein a casing of the blower unit is formed in a concave shape.
The formed first member and the open end of the first member are closed.
A second member having a flat plate shape.
When formed into a shape that conforms to the inner surface shape of the first member,
In addition, a flange is provided on a peripheral edge on the opening end side of the first member.
Formed on the first member and the second member.
It has been sandwiched by members (claim 1 ).

[0008]

[0009]

Thus, according to the present invention, the casing of the blower unit is constituted by the first concave member and the second flat plate member closing the first member, and the inner surface shape of the first member is reduced. While forming a heat insulating member in the shape that accompanies ,
A flange is formed on the periphery of the heat insulating member, which is the opening end side of the first member, and the flange is sandwiched and fixed between the first member and the second member, thereby facilitating the heat insulating member. Can be attached to

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

An air conditioner 1 for a vehicle shown in FIG. 1 includes a heat exchange unit 2 and a blower unit 3 and is particularly suitable for heavy equipment such as a shovel car. The heat exchange unit 2 includes an evaporator 5 as a heat exchanger for cooling in a heat exchange unit casing 4,
A heater core 6 as a heat exchanger for heating is provided.
An outside air inlet 7 and an inside air inlet 8 are formed on the upstream side of the heat exchange unit casing 4, and the outside air inlet 7 and the inside air inlet 8 are provided with air filters 9 and 1, respectively.
0 is attached. Further, the outside air inlet 7 is opened and closed by an outside air inlet opening / closing damper 11, and can be shielded when the outside air particularly contains dust and the like.

An opening / closing damper 12 for opening and closing a passage to the heater core 6 is provided upstream of the heater core 6, and an opening / closing damper 13 for opening and closing this bypass passage 14 is provided in a bypass passage 14 bypassing the heater core 6. The open / close dampers 12 and 13 constitute a mix damper, and the mix dampers 12 and 13 adjust the ratio of the air passing through the heater core 6 to the bypass air. The downstream end of the heat exchange unit casing 4 is closed by the blower unit 3.

As shown in FIGS. 1 and 2, the blower unit 3 includes a first member 20 formed in a concave spiral shape and a second member 40 for closing an open end of the first member 20.
And a heat insulating member 60 mounted on the inner wall surface of the casing 30 (the first member 20).
And a fan 81 disposed in a spiral space 80 in the casing 30 and a motor 82 for driving the fan 81. The spiral space 80 communicates with a front outlet 86 and a rear outlet 88 formed at an upper end portion of the casing 30. The amount of air blown from the front outlet 86 and the rear outlet 88 is determined by the air distribution door. 87.

Reference numeral 83 denotes the spiral space 80 and the motor 8
The cooling pipe communicates with the inside of the motor 2 and is configured to cool the motor 82 by supplying the air in the spiral space 80 to the motor 82. 84 is the motor 8
2 is a resistance box in which a resistance for adjusting the rotation level of the resistance box 2 is housed.
Cooling.

In the vehicle air conditioner 1 having the above structure, the inside air and the outside air are sucked from the outside air inlet 7 by opening and closing the inside air inlet 8 and the outside air inlet opening / closing damper 11 by the suction force generated by the rotation of the fan 81. The sucked air is cooled by passing through the evaporator 5,
The air that passes through the heater core 6 and the air that bypasses the heater core 6 are diverted by an amount adjusted by the opening degrees of the air mix dampers 12 and 13. Then, the air that has been heated by passing through the heater core 6 and the air that has been cooled while bypassing the heater core 6 are introduced into the blower unit 3 through the opening 41 formed in the second member 40 of the blower unit 3. Suctioned from the fan 81 and the spiral space 8
The air is blown out from the front outlet 86 and the rear outlet 88 into a room (not shown) at a rate adjusted by the air distribution door 87 after passing through 0 to control the temperature of the room.

In the vehicle air conditioner 1 having the above configuration, when the cooling mode is selected, the blower unit 3
Cold air is sucked inside. For this reason, since the casing 30 including the first member 20 and the second member 40 is cooled to a temperature lower than the ambient temperature of the casing 30, water drops due to dew condensation are generated on the outer surface of the casing 30. There was a defect. In particular, as shown in FIG.
Electrical components such as a relay 91 for adjusting the rotation level of the motor 82, an actuator 92 for driving the air distribution door 87, and a connector terminal 93 are disposed on the outer surface of the casing 30. Is undesirable. In addition, since it is necessary to mount these electric components, the outer peripheral surface of the casing 30 has a complicated structure, and it is quite difficult to cover the casing 30 with a heat insulating material or the like.

For this reason, the present invention relates to the casing 30
Inside, a heat insulating material, for example, a heat insulating member 60 formed of a synthetic resin, particularly, styrene foam is arranged. Thereby, since the casing 30 is cut off by the heat insulating member 60 from the sucked cool air in the casing 30, the casing 30 itself does not cool down, and dew condensation on the outer surface of the casing 30 can be prevented. It is.

Explaining an example of mounting the heat insulating member 60, the casing 30 of the blower unit 3 is constituted by the first member 20 shown in FIG. 3 and the second member 40 shown in FIG.

As shown in FIG. 3, the first member 20 includes a flat portion 26 having a spiral peripheral edge,
And a wall 27 that stands substantially vertically from the periphery of the wall. In the flat part 26, the opening part 21 in which the fan 81 is inserted and closed by the cover 85 of the motor 82, the opening part 83a in which one end of the cooling pipe 83 opens, and one side surface of the resistance box 84 are exposed. An opening 84a, an opening limiting wall 25 of the air distribution door 87 and a positioning recess 22 of the heat insulating member 60 are formed, and the front outlet 86 and the rear outlet 88 open in the wall 27. Things. Reference numeral 87a denotes a mounting hole in which a shaft as a rotation fulcrum of the air distribution door 87 is mounted, reference numeral 24 denotes a cylindrical heat insulating member retainer, and reference numeral 23 denotes a screw to which a fixing post is mounted. It is a hole. A flange 28 extending outward is formed at an end of the wall 27.

The heat insulating member 60 mounted on the first member 20 is shown in FIGS. 4 (a) and 4 (b), and is formed of a heat insulating material such as a synthetic resin, in particular, styrene foam. The first member 20 is formed to have the same shape as the inner surface, and the first member 20 has a flat portion 69 in contact with the inner surface of the flat portion 26, and a substantially vertical standing from the periphery of the flat portion 69. And a wall 70 that abuts against the inner surface of the wall 27 of the first member 20. An opening 61 overlapping with the opening 21 of the first member 20 is formed in the flat portion 69, and the opening 83 a
The opening 62 overlaps with the opening 84a, and the opening 63 overlapping with the opening 84a is formed, and the projection 63 meshing with the positioning recess 22 is formed. The heat-insulating member retainer 24
Are formed to engage with each other. Further, a portion (planar portion) 67 facing the screw hole 23 is formed in a planar shape within a predetermined range on the second member 40 side, and a hole 66 overlapping the screw hole 23 is formed.

Further, a flange 65 extending outward is formed at an end of the wall portion 70 of the heat insulating member 60. The flange 65 is connected to the wall 27 of the first member 20.
And over a predetermined range with the flange 28 formed at the end of. Note that a step may be formed in the flange 28, and the flange 65 may be fitted into the step.

The heat insulating member 60 is mounted on the inner surface of the first member 20 by fitting the concave portion 63 and the concave portion 68 into the positioning concave portion 22 and the heat insulating member retainer 24, respectively. FIG. 5 shows a state where the heat insulating member 60 is mounted on the first member 20.

The second member 40 is shown in FIG. 6 and closes the open side of the first member 20 on which the heat insulating member 60 is mounted, and is a flat plate having a spiral peripheral edge. An opening 41 that is formed and opens to the heat exchange unit 2 is formed. In addition, 42 and 43 shown in FIG. 6 are flanges for fixing the blower unit 3 to the heat exchange unit 2.

The casing 30 of the blower unit 3
Is formed by closing the first member 20 to which the heat insulating member 60 is attached with the second member 40. In particular, the flange portion 65 of the heat insulating member 60 is formed by the flange portion 28 of the first member 20. And the peripheral portion 44 of the second member 40 to be fixed. Further, the flat portion 67 is fixed to the second member 40 by a support (not shown).

As a result, the blower unit 3 having the heat insulating member 60 mounted on the inner surface of the first member 20 can be obtained, and the casing 30 of the blower unit 3 can be shielded from cool air. It is possible to prevent dew condensation on the outer side surface of 30.

[0027]

As described above, according to the present invention, the casing of the blower unit can be shielded from the cool air by disposing the heat insulating member made of a heat insulating material inside the blower unit through which the cool air passes. for, although Ru can prevent condensation, to form a heat insulating member as a separate part, this in order to have as mounted inside the blower unit, it is possible to incorporate a heat insulating member easily, and
In addition, the flange portion of the heat insulating member has a first member and a second member.
And can be easily fixed. That
Therefore , cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a configuration of a vehicle air conditioner according to the present invention.

FIG. 2 is a partial side view showing a blowing unit of the vehicle air conditioner according to the present invention.

FIG. 3 is a plan view showing a first member constituting the blowing unit.

FIG. 4A is a side view of a heat insulating member, and FIG. 4B is a plan view thereof.

FIG. 5 is a plan view showing a state where a heat insulating member is attached to the first member.

FIG. 6 is a plan view showing a second member constituting the blowing unit.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 air conditioner for vehicle 2 heat exchange unit 3 blower unit 5 evaporator 6 heater core 20 first member 30 casing 40 second member 60 heat insulating member 65 flange 81 fan

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B60H 1/00

Claims (1)

(57) [Claims] An intake port is provided, and downstream of the intake port,
The vehicle air conditioner, comprising: a heat exchange unit provided with at least one heat exchanger; and a blower unit located downstream of the heat exchange unit and having a fan provided therein. The casing has a concave shape
A first member and a flat plate-shaped member for closing an open end of the first member;
A heat insulating member disposed in the first member , wherein the heat insulating member is provided in the first member.
Is formed into a shape that conforms to the inner surface shape of
A flange is formed on the periphery on the opening end side of the member, and the flange is formed by the first member and the second member.
An air conditioner for a vehicle, characterized in that the air conditioner is held.