JP2011152850A - Air-conditioning unit for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air-conditioning unit for a vehicle, which prevents the occurrence of condensation in a case body by surely draining water from a drain hole, without sticking drain water generated from an evaporator to a case body inner wall. <P>SOLUTION: In this air-conditioning unit for the vehicle, a drain water guide means composed of a cover part (20) forming part of an air-blowing flow passage, a drain water receiving part (22) for receiving and guiding the drain water produced from the evaporator to the drain hole (10) and a nozzle part (24) extending to the inside a drain passage (12) outside the case body by penetrating through the drain hole from the drain water receiving part, is arranged in the case body (2) for storing the evaporator (6) so that at least the drain water receiving part is noncontacted with the inner surface of the case body. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicle air conditioning unit, and more particularly to a vehicle air conditioning unit including an HVAC (heating, ventilating, air conditioning) unit including an evaporator.

An automotive air conditioner is described in Patent Document 1. This automotive air conditioner increases the water leakage prevention property while preventing the condensed water (drain water) generated in the cooling heat exchanger (evaporator) from flying into the passenger compartment. In order to do this, a lid member that partitions the drain groove and the air passage for flowing condensed water is attached.
However, in the automotive air conditioner of Patent Document 1, the insulator in which the drain groove is formed contacts the case body, and the side surface of the case body on the lower side of the lid and upstream of the evaporator is exposed to the drain water. State. Therefore, the low temperature of the drain water is transmitted to the lower surface of the case main body through the drain groove, so that the lower surface of the case main body may be cooled and condensed. In addition, since the case main body side on the upstream side of the evaporator is exposed to drain water, the vehicle tilts when the vehicle is accelerating / decelerating and turning, and the drain water splashes and adheres to the side of the case main body. There is a risk of condensation.

  Condensation on the case body is caused by the large condensation falling into the passenger compartment, causing the passengers to feel uncomfortable, getting the passenger compartment wet, and splashing water on electrical parts and wires, causing corrosion and short-circuiting. This is not preferable because it may cause

JP 2006-56342 A

  The present invention is based on the above-described conventional technology, and without drain water generated from the evaporator adhering to the inner wall of the case main body, the drain water can be surely drained to prevent the occurrence of condensation on the case main body. An object of the present invention is to provide a vehicle air conditioning unit.

  In order to achieve the above-described object, in the vehicle air conditioning unit according to claim 1, an evaporator that cools the blown air, a case main body that houses the evaporator and has a blow passage that guides the blown air to the evaporator, A drain hole opened in a lower part or a side part of the case main body, a lid part forming a part of the air flow path, a drain water receiving part that receives drain water generated from the evaporator and guides it to the drain hole; A nozzle portion that extends from the drain water receiving portion through the drain hole to the outside of the case main body, and at least the drain water receiving portion is not in contact with the inner surface of the case main body. It is characterized by comprising drain water guide means provided.

  In the vehicle air conditioning unit according to claim 2, the drain water guide means has a shape in which the drain water receiving portion is narrowed downward toward the drain hole, and from the point where the drain water receiving portion is narrowed. The nozzle portion extends.

  According to the vehicle air-conditioning unit of the present invention using the above means, the vehicle air-conditioning unit is generated from the evaporator and the lid part that forms a part of the air flow path in the case main body that houses the evaporator. At least the drain water guide means comprising a drain water receiving portion for receiving the drain water received and leading to the drain hole, and a nozzle portion extending from the drain water receiving portion to the outside of the case body through the drain hole. Provided so as not to contact the inner surface of the case body.

  In the drain water guiding means, the drain water receiving portion through which the drain water passes is provided in non-contact with the inner surface of the case main body, so that the low temperature of the drain water flowing through the drain water receiving portion is not transmitted to the case main body. And by providing a nozzle portion that extends from the drain water receiving portion through the drain hole to the outside of the case body, it is possible to prevent a gap from being generated between the drain water guiding means and the drain passage, The drain water can be reliably guided from the drain water guiding means to the outside of the case body.

Thereby, drain water can be discharged | emitted out of a case main body, without making it adhere to a case main body inner surface, and the dew condensation in a case main body can be prevented reliably.
According to the vehicle air conditioning unit of the second aspect, the drain water receiving portion of the drain water guiding means has a shape constricted downward toward the drain hole, and the nozzle portion is provided from the constricted tip of the drain water receiving portion. The shape is extended.

  In this way, the drain water receiving part has a shape that is narrowed downward toward the drain hole, so that even when the vehicle is tilted, or when drain water splashes during acceleration / deceleration or turning of the vehicle, etc. The drain water can be reliably guided to the drain hole without leaking into the main body. In addition, since drain water is collected along the drain water receiving portion narrowed downward and guided to the drain hole, drain water with an increased flow velocity is provided at the nozzle portion extending from the constricted tip of the drain water receiving portion. Can flow into the outside of the case body more reliably without causing the drain water to stagnate.

1 is an overall cross-sectional view of a vehicle air conditioning unit according to the present invention. It is a schematic perspective view of the case main body cooling part of the vehicle air conditioning unit which concerns on this invention. 1 is a schematic perspective view of a vehicle air conditioning unit according to the present invention. It is a schematic perspective view of an inner guide. It is AA sectional drawing of FIG.

  Referring to FIGS. 1 to 3, FIG. 1 is an overall cross-sectional view of a vehicle air conditioning unit according to the present invention, and FIGS. 2 and 3 are schematic perspective views of the vehicle air conditioning unit. 1 is a cross-sectional view of the lower half of the case body 2 as viewed from above, FIG. 2 is a perspective view of the upstream side of the evaporator as viewed from the right, and FIG. 3 is a perspective view as viewed from the left. . In FIGS. 2 and 3, the case body is partially cut away.

A vehicle air conditioning unit 1 shown in FIG. 1 is provided in an instrument panel in a vehicle compartment.
The vehicle air conditioning unit 1 includes a case body 2 provided with a blower fan 4 that blows air, an evaporator 6 (evaporator) that cools blown air, a heater core (not shown) that heats blown air, and the like. Yes.

  The case main body 2 forms an air flow path from the blower fan 4 to the evaporator 6 inside. Specifically, the air flow path of the case body 2 communicates from the cylindrical portion 2a provided with the blower fan 4 to the cooling portion 2c provided with the evaporator 6 via the connecting passage 2b. The air blown by the air passes through the connecting passage 2b, flows into the cooling unit 2c, passes through the evaporator, and further flows downstream. The flow of the blown air is indicated by white arrows in each figure.

As shown in FIGS. 2 and 3, the evaporator 6 is provided in the cooling section 2 c of the case body 2 along the air flow path cross section. An inner guide 8 (drain water guiding means) is provided below the cooling unit 2c and upstream of the blowing air from the evaporator.
The evaporator 6 has a refrigerant passing through it, and cools the blown air by heat exchange using the refrigerant. There are various types of the evaporator 6, but in general, a laminated type in which a plurality of heat radiation fins are arranged side by side is used. The refrigerant supplied to the evaporator 6 is compressed by a compressor (not shown) and further liquefied by a condenser (not shown), which is vaporized. In other words, the heat exchange action described above utilizes the latent heat of this refrigerant.

  The blown air that has flowed into the cooling part 2 c of the case body 2 passes above the inner guide 8 and flows to the downstream side of the blown air of the case body 2 through the evaporator 6. This blown air is cooled by passing through the evaporator 6, specifically, between the heat dissipating fins, and provided as cold air to the vehicle interior. When this compressed air is cooled, drain water (condensed water) is generated. The drain water is guided by the inner guide 8 to the drain hole 10 opened on the side surface of the case body 2, and is drained out of the vehicle compartment through the tubular drain passage 12 protruding from the drain hole 10 to the outside of the case body 2. The

Here, referring to FIGS. 4 and 5, FIG. 4 is a schematic perspective view of the inner guide, and FIG. 5 is a cross-sectional view taken along line AA in FIG. 1. Hereinafter, in addition to FIGS. 1 to 3 described above, the inner guide 8 will be described in detail with reference to FIGS.
As shown in FIG. 4, the inner guide 8 has a configuration in which the inner guide 8 is integrally formed with the lid portion 20, the drain water receiving portion 22, and the nozzle portion 24.

  The lid portion 20 is a rectangular plate member that is continuous with the lower surface of the connection passage 2b of the case body 2 and forms a blower passage in the cooling portion 2c. The lid portion 20 has one short side 20a in contact with the lower surface of the connection channel 2b, the other short side 20b and one long side 20c in contact with the inner surface of the case body 2, and the other long side 20d in contact with the side surface of the evaporator 6. Touch. As shown in FIG. 5, the lid portion 20 divides an air blowing space above the cooling portion 2 c of the case body 2 and a drainage space below.

The drain water receiving portion 22 is formed below the lid portion 20, and is formed from the lower surface of the evaporator 6 to the drain hole 10 of the case body 2 when installed in the case body 2.
More specifically, the drain water receiving portion 22 includes a wall portion 22 a that extends vertically downward from the lower surface of the lid portion 20, and a receiving portion bottom surface 22 b that forms the bottom surface of the drain water receiving portion 22.
The wall portion 22a of the drain water receiving portion 22 extends from the both ends of the lid portion 20 on the evaporator side toward the drain side, and extends to the center while curving so as to collect the drain water toward the center side. A pair of opposing wall portions 22a extend from the center at one short side 20a side portion of the lid portion 20 so as to form an introduction passage toward the drain hole 10 side.

  The receiving portion bottom surface 22b of the drain water receiving portion 22 extends from the lower surface of the evaporator 6 to the drain hole 10 along the wall portion 22a. In particular, in the introduction passage portion formed by the pair of opposed wall portions 22a, the receiving portion bottom surface 22b is inclined further downward than the surface along the lower surface of the evaporator 6, and the lower portion of the wall portion 22a approaches each other. The introduction passage has a shape narrowed toward the drain hole 10.

The nozzle portion 24 passes through the drain hole 10 from the receiving portion bottom surface 22b of the introduction passage, extends into the drain passage 12 outside the case body 2, and has a semi-tubular shape with the upper half opened. When the inner guide 8 is installed in the case body 2, the tip of the nozzle portion 24 abuts along the lower surface shape in the drain passage 12.
The inner guide 8 configured in this manner has the sides of the lid portion 20 and the receiving portion bottom surface 22 abutting against the inner surface of the case body 2 and the like, and the lower surfaces on both short sides of the lid portion 20 are the inner surfaces of the case body 2 side portions. It is supported by coming into contact with the more protruding support portions 2d and 2d. Since the inner guide 8 is supported by the support portions 2d and 2d, the drain water receiving portion 22 through which drain water flows does not come into surface contact with the inner surface of the main body case 2, and each surface (wall) of the drain water receiving portion 22 The portion 22a and the receiving portion bottom surface 22b) are provided with a predetermined distance from the inner surface of the case body 2. Thereby, an air layer is formed between the drain water receiving part 22 and the case main body 2.

Further, as shown in FIG. 5, the inner guide 8 is supported by being inclined from the horizontal direction so that the nozzle portion 24 is at the lowest end position. This inclination angle is set according to the angle at which the vehicle can be inclined, and for example, it is preferable that the surface of the receiving portion bottom surface 22b that contacts the lower surface of the evaporator is supported so as to be inclined by 20 ° to 25 °.
Hereinafter, the effect of the vehicle air conditioning unit 1 configured as described above will be described.

In the vehicle air conditioning unit 1, the blown air that has flowed into the cooling unit 2 c from the blower fan 4 is guided to the evaporator 6 through the upper portion of the lid 20 of the inner guide 8.
On the other hand, the drain water generated in the evaporator 6 travels from the lower portion of the evaporator 6 to the receiving portion bottom surface 22b of the drain water receiving portion 22 in the inner guide 8, and is collected in the introduction passage by the wall portion 22a. Then, the drain water passes through the introduction passage having a shape inclined and narrowed downward, and the flow velocity is increased and flows into the drain passage 12 along the nozzle portion 24.

As described above, in the inner guide 8, the drain water receiving portion 22 through which drain water passes is provided in a non-contact manner with a predetermined distance from the inner surface of the case body 2, so that the low temperature of the drain water flowing through the drain water receiving portion 22. Is not transmitted to the case body 2. Therefore, condensation in the case main body 2 can be prevented.
In addition, the inner guide 8 is provided to be inclined toward the drain hole 10 in consideration of the inclination of the vehicle, and in the drain water receiving portion 22, the wall portion 22 a and the receiving portion bottom surface 22 b correspond to the drain hole 10. Since the introduction passage formed by the pipe is narrowed downward toward the drain hole 10, the case can be used even when the vehicle is tilted or when drain water splashes during acceleration / deceleration or turning of the vehicle. Drain water is not leaked into the main body 2.

In addition, drain water leaks into the case body 2 by the cover 20 covering the upper portion of the drain receiving part 22 and partitioning the air blowing space and the drainage space in the cooling part 2 c of the case body 2. Can be prevented.
The inner guide 8 is provided with a nozzle portion 24 that extends from the drain water receiving portion 22 through the drain hole 10 to abut along the inside of the drain passage 12, so that the inner guide 8 and the drain passage 12 are provided. The drain water can be reliably guided from the inner guide 8 into the drain passage 12 outside the case main body 2.

Further, since drain water is collected along the introduction passage having a shape narrowed downward in the drain water receiving portion 22 and guided to the drain hole 10, the nozzle portion 24 extending from the narrowed portion of the introduction passage has a flow velocity. The drain water that has risen flows, and the drain water can be more reliably flowed into the drain passage 12 without stagnation.
Further, as apparent from FIG. 4, the inner guide 8 does not have a closed space or the like and has a shape opened in the short side direction of the lid portion 20, so that the short side direction is defined as the extraction direction. The mold can be easily formed integrally. That is, dew condensation can be prevented with a simple configuration without significantly increasing the number of parts or using a special device or the like.

From the above, the vehicle air conditioning unit according to the present invention can discharge drain water to the drain passage without adhering to the inner surface of the case body, and can more reliably prevent condensation in the case body.
Although description about embodiment of the vehicle air-conditioning unit which concerns on this invention is now complete | finished, embodiment is not restricted to the said embodiment.

In the above embodiment, the nozzle portion 24 has a semi-tubular shape, but the shape of the nozzle portion 24 is not limited to this. For example, a tubular shape, a V-shaped cross section, or a drain for simplifying the shape. It is good also as a plate-shaped nozzle part which water conveys.
Moreover, in the said embodiment, although it is the structure which the nozzle part 24 extended in the drain channel | path 12, if the said nozzle part penetrates a drain hole and is extended out of the case main body, there will be the effect, For example, the present invention can be applied to a case main body in which a drain passage is short or a drain passage is not formed.

DESCRIPTION OF SYMBOLS 1 Vehicle air conditioning unit 2 Case main body 2a Cylindrical part 2b Connection path 2c Cooling part 2d Support part 4 Blower fan 6 Evaporator 8 Inner guide (drain water guide means)
DESCRIPTION OF SYMBOLS 10 Drain hole 12 Drain channel | path 20 Cover part 20a, 20b Short side 20c, 20d Long side 22 Drain water receiving part 22a Wall part 22b Receiving part bottom face 24 Nozzle part

Claims (2)

An evaporator for cooling the blown air;
A case main body that houses the evaporator and has a blowing passage that guides the blowing air to the evaporator;
A drain hole opened in a lower part or a side part of the case body;
A lid portion that forms a part of the air flow path, a drain water receiving portion that receives drain water generated from the evaporator and guides it to the drain hole, and passes through the drain hole from the drain water receiving portion. And a drain water guiding means provided in the case body so that at least the drain water receiving part is not in contact with the inner surface of the case body. Air conditioning unit for vehicles.   The drain water guiding means has a shape in which the drain water receiving portion is narrowed downward toward the drain hole, and the nozzle portion extends from a point where the drain water receiving portion is narrowed. The vehicle air conditioning unit according to claim 1.

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