JPH10315752A - Air conditioner for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent leakage water from flowing out into a cabin even in case of the leakage of water being generated at a cabin internal laid part of a hot water pipeline for leading hot water after cooling an engine, to a heater core disposed in an air conditioner for a vehicle. SOLUTION: An evaporator 21 and a heater core 32 are disposed in a file inside a temperature regulating duct 45 of a heater unit 40 fixed to a dashboard panel DP and disposed in a cabin. A hot water pipeline 33 for communicating the heater core 32 with an (unillustrated) engine outside of the cabin is laid at a side wall outer side part (cabin inner side) of the temperature regulating duct 45. A cover 41 is provided in a watertight state together with the air- conditioning duct 45 so as to surround the hot water pipeline 33, and even in case of water leakage being generated from the hot water pipeline 33 due to some cause, this leakage water does not flow out into the cabin. The leakage water is drained to the outside of the cabin through a communicating hole 42 and a drain hole 44.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an air conditioner for a vehicle.

[0002]

2. Description of the Related Art A conventional vehicle air conditioner will be described with reference to FIGS. FIG. 3 is a block diagram showing a configuration of a vehicle air conditioner main body of a reheat air mix system. The air conditioner main body is composed of three subunits, and operates in accordance with an air conditioning mode set by a passenger on a control panel (not shown) installed in the vehicle interior. That is, the vehicle air conditioner main body includes a blower unit 10 for guiding air outside or inside the vehicle compartment into the air conditioner, and a cooling unit 2 for cooling and dehumidifying the air guided by the blower unit 10.
0, and a heater unit 30 for reheating the air cooled and dehumidified by the cooling unit 20 and guiding the air to a predetermined outlet in the vehicle cabin. These three subunits are generally arranged in a direction substantially perpendicular to the traveling direction of the vehicle (lateral direction) as shown in FIG.

In FIG. 4, one end of a refrigerant pipe 22 is connected to an evaporator 21 (FIG. 3) provided inside a cooling unit 20, and the compressor 2 is connected to the other end.
3. The condenser 24 and the like are connected to form a refrigerant circulation path. The air flowing inside the cooling unit 20 is cooled and dehumidified by the refrigerant flowing in the evaporator 21. At this time, the cooling unit 20
Is condensed to form water droplets, which are dropped on the inner bottom of the cooling unit 20, but are discharged on the road via the drain pipe D.

A heater core 32 (FIG. 3) disposed inside the heater unit 30 is connected to one end of a hot water pipe 33, and the other end is connected to an engine E and a water cock (not shown). Then, a part of the hot water, which is pressure-fed by a water pump (not shown) and passes through a water jacket provided inside the engine E and cools the engine, flows into the heater core 32 via a water cock (not shown). Thereby, the heater core 32
Is heated, and the air is warmed when passing through the heater core 32.

Referring again to FIG. 3, the operation of the air conditioner main body will be described. A ventilation duct V, a defroster duct D, and a foot duct F are connected to the heater unit 30, and a ventilator door VD, a differential door DD, and a foot door FD are respectively connected to these ducts V, D, F, and the heater unit 30. It is arranged. Further, the heater unit 30 has an intake door ID, and the blower unit 10 has an air mix door MD.
The opening degree of each door is controlled by a control device (not shown) based on the air-conditioning mode and the temperature inside and outside the vehicle interior set by a passenger on a control panel (not shown) provided in the vehicle interior. This controls the humidity and temperature of the air blown into the cabin, the air volume, and from which duct the air is blown.

The air conditioner body described with reference to FIGS. 3 and 4 includes a blower unit 10, a cooling unit 20, and a heater unit 30 as described above.
Are arranged in a line in a direction substantially perpendicular to the traveling direction of the vehicle, but an arrangement as shown in FIG. 5 has been proposed in order to make the air conditioner main body more compact. That is, the air conditioner body shown in FIG. 5 has the evaporator 21 and the heater core 32 arranged in the vehicle traveling direction (column), and the evaporator 21 and the heater core 32 are integrally provided inside the heater unit 40. It is. Then, the air blown by the blower unit 10 is guided from the front side to the rear side (downward in FIG. 5) of the vehicle.

[0007]

However, in the air-conditioning apparatus main body portion arranged as shown in FIG. 5, while the compactness can be achieved, the hot water pipe 33 communicating the engine E and the heater core 32 is provided in the vehicle interior. It is necessary to arrange in.
For this reason, when water leaks from the hot water pipe for some reason, the interior material and the like on the floor surface may be wet by the water flowing into the room and the comfort of the occupant may be impaired.

An object of the present invention is to provide a vehicle air conditioner in which leaked water does not flow into the vehicle compartment even if water leaks from a hot water pipe disposed in the vehicle compartment. .

[0009]

FIG. 2 shows an embodiment of the present invention.
The present invention will be described in association with (1) An invention according to claim 1 is an evaporator 21 for cooling and dehumidifying a vehicle interior;
A heater core 32 disposed on the downstream side of the vehicle 1 to heat the vehicle interior using hot water after engine cooling as a heat source; evaporator 2
1 and a heater core 32 in a row along the vehicle traveling direction; a temperature control duct 45; a hot water pipe 33 for guiding hot water after engine cooling to the heater core 32; And a surrounding member 41 that surrounds the
The above-described object is achieved by providing the surrounding member 41 with the communication passage 42 formed by the surrounding member 41 and communicating the space in which the hot water pipe 33 is laid and the outside of the vehicle compartment. (2) An evaporator 21 for cooling and dehumidifying the interior of the vehicle;
A heater core 32 disposed on the downstream side of the vehicle 1 to heat the vehicle interior using hot water after engine cooling as a heat source; evaporator 2
1 and a temperature control duct 45 for housing the heater cores 32 in tandem along the traveling direction of the vehicle; and a temperature control duct 45 for guiding water droplets generated by condensation of water vapor in the air cooled by the evaporator to the outside of the vehicle compartment. A drain hole 44 drilled at the bottom of the heater; a hot water pipe 33 that guides hot water after engine cooling to the heater core 32; a surrounding member 41 that watertightly surrounds a portion of the hot water pipe 33 laid in the vehicle interior; The above-mentioned object is achieved by having the communication passage 42 which communicates the space formed by the above with the internal space of the temperature control duct 45.

In the section of the means for solving the above-mentioned problems, which explains the configuration of the present invention, the drawings of the embodiments of the present invention are used for easy understanding of the present invention. However, the present invention is not limited to this.

[0011]

【The invention's effect】

(1) According to the first aspect of the present invention, the vehicle room laid portion of the hot water pipe that guides the hot water after engine cooling to the heater core is watertightly surrounded by the surrounding member, and the vehicle water laid portion of the hot water pipe is laid. If water leaks from the vehicle interior, the leaked water first accumulates in the surrounding member, and this water is guided to the outside of the vehicle compartment through a communication passage communicating the space formed by the surrounding member and the outside of the vehicle compartment. Interior materials do not get wet. (2) According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, water leaked from the hot water pipe is supplied to the space formed by the surrounding member and the inside of the temperature control duct. To the bottom of the temperature control duct through a communication passage that communicates with the space, and discharges from the drain hole originally drilled for condensed water discharge at the bottom of this temperature control duct, so a new drain hole It is not necessary to provide the fins, which is excellent in economic efficiency.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing a state in which an air conditioner main body of a vehicle air conditioner according to an embodiment of the present invention is viewed obliquely rearward with respect to a vehicle traveling direction. It is drawn in an omitted state. FIG. 2A shows a main body of the air conditioner in FIG.
FIG. 2B is a side view as viewed from the direction I, and FIG.
3 shows a BB cross section in FIG. These FIGS. 1 and 2
Is attached to the dash panel DP and disposed in the vehicle interior. The same components as those of the main body of the conventional air conditioner shown in FIG. 3 or 4 are denoted by the same reference numerals, and the description thereof will be omitted.

In FIG. 1, a heater unit 40 is composed of an air mix door, a differential door, a ventilator door, a foot door and the like (not shown) in addition to the evaporator 21 and the heater core 32.
5 is stored inside. Duct openings 45d, 45v, and 45f are formed in the temperature control duct 45, and these duct openings 45d, 45v, and 45f are connected to a defroster duct, a ventilator duct, and a foot duct (not shown), respectively. The air temperature-controlled in 45 blows into a vehicle interior from a predetermined outlet (not shown).

The hot water pipe 3 connected to the heater core 32
Numeral 3 is laid along the outside of the side wall of the temperature control duct 45, penetrates through the dash panel DP, and is guided to the engine room side. Then, as shown in FIG. 2, a cover 41 is provided so as to surround the hot water pipe 33 laid as described above along the side wall of the temperature control duct 45. The cover 41 and the temperature control duct 45 are joined in a watertight manner to form a closed space.

In the vicinity of the bottom of the closed space, a communication hole 42 communicating with the space inside the temperature control duct 45 is provided. Further, the evaporator 2 is provided at the bottom of the temperature control duct 45.
A drain hole 44 is provided for guiding water that is condensed and dropped in the air when the air-conditioning unit 1 performs the cooling and dehumidifying operation to the outside of the vehicle compartment.

The heater unit 40 according to the embodiment of the present invention is configured as described above.
Even if water leaks from a portion laid along the side wall of the temperature control duct 45, that is, a portion laid in the vehicle interior, the leaked water is prevented from flowing into the vehicle interior by the cover 41. The water flowing into the inside of the cover 41 is
As shown by an arrow a in (b), the cover 41, the communication hole 42,
Since it is guided to the outside of the cabin through the drain hole 44, the interior materials and the like laid in the cabin are not wetted.

The heater unit 40 is installed below the instrument panel, and is normally invisible and inaccessible to the occupants. An operator's hand may touch the hot water pipeline 33 laid on the side wall. Therefore, even if the maintenance is performed in a warm-up state, that is, in a state where the hot water pipe 33 is hot, the cover 41 does not allow the operator's hand to directly touch the hot water pipe 33. Further, by forming the cover 41 with a transparent member, it is possible to check whether or not there is water leakage at, for example, a joint portion between the heater core 32 and the conduit 33.

In the above description, the temperature control duct 45
The number of the communication holes 42 is one, but a plurality of communication holes may be provided. Further, instead of the communication hole 42, a communication hole for directly guiding the water accumulated in the internal space of the cover 41 to the outside of the vehicle compartment may be provided.

In the correspondence between the above-described embodiment and the claims, the cover 41 forms a surrounding member, and the communication hole 42 forms a communication passage.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a heater unit of a vehicle air conditioner according to an embodiment of the present invention.

FIGS. 2A and 2B are diagrams illustrating a configuration of a heater unit of the vehicle air conditioner according to the embodiment of the present invention, wherein FIG. 2A is an external side view and FIG.

FIG. 3 is a block diagram showing a configuration of a vehicle air conditioner main body of a reheat air mix system.

FIG. 4 is a perspective view showing an arrangement in a vehicle of a vehicle air conditioner according to the related art.

FIG. 5 is a diagram showing an arrangement in a vehicle of a vehicle air conditioner (evaporator, heater core tandem arrangement type) according to a conventional technique, and shows a state viewed from the upper surface of the vehicle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Blower unit 20 Cooling unit 21 Evaporator 30, 40 Heater unit 32 Heater core 33 Hot water pipe 41 Cover 42 Communication hole 44 Drain hole 45 Temperature control duct

Claims (2)

[Claims] An evaporator for cooling and dehumidifying a vehicle interior; a heater core disposed downstream of the evaporator for heating the vehicle interior using hot water after engine cooling as a heat source; the evaporator and the heater A temperature control duct for accommodating the cores in tandem in the vehicle traveling direction; a hot water pipe for guiding the hot water after the engine cooling to the heater core; and a surrounding member for watertightly surrounding a portion of the hot water pipe laid in the vehicle interior. And a communication passage formed in the surrounding member and communicating with a space in which the hot water pipe is laid and the outside of the vehicle compartment. 2. An evaporator for cooling and dehumidifying the interior of the vehicle, a heater core disposed downstream of the evaporator and heating the interior of the vehicle using hot water after engine cooling as a heat source, the evaporator and the heater A temperature control duct section for storing the cores in tandem along the vehicle traveling direction; and a hole formed at the bottom of the temperature control duct to guide water droplets generated by condensation of water vapor in the air cooled by the evaporator to the outside of the vehicle compartment. A drain hole provided, a hot water pipe that guides the hot water after the engine cooling to the heater core, a surrounding member that watertightly surrounds a cabin laid portion of the hot water pipe, and a space formed by the surrounding member. And a communication passage communicating with the internal space of the temperature control duct.