JPH1035251A - Vehicular air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the feeling of heating given to passengers in the rear seats as to passengers in the front seats in a vehicle. SOLUTION: A foot opening 33 communicating with a front foot vent and a rear foot vent is provided at a position where warm air heated by a heater core 13 and cold air which has bypassed the heater core 13 flow in a substantial two-stratified state. On the downstream side of the foot opening 33, a partition plate 34 is provided for partitioning off the foot opening 33 into the first opening communicating with the rear foot vent 21 and the second opening communicating with the front foot vent 20. The partition plate 34 is arranged to separate warm air and cold air flowing through the foot opening 33 in a substantial twostratified state. The foot opening 33 is disproportioned in its both sides on which both ends of the partition plate 34 are situated such that the second opening becomes wider compared with the first opening.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for a vehicle having a foot outlet on a front seat side and a rear seat side.

[0002]

2. Description of the Related Art Conventionally, there is an air-mix type air conditioner which mixes air heated by a heater core and air bypassing the heater core and blows the mixed air into a vehicle interior. In this air-mix type air conditioner, when the front seat side and the rear seat side have a foot outlet, an opening part opened and closed by the foot door is connected to the front seat foot outlet and the rear seat foot outlet by a duct. ing. Therefore, when the foot mode is set and the foot door opens the opening, the air passing through the opening branches and flows, one is blown out from the front seat side foot outlet to the feet of the front seat occupant, and the other is the rear seat. It is blown out from the side foot outlet to the feet of the rear passenger.

[0003]

However, in the conventional air-mix type air conditioner, the duct length from the opening to the rear seat foot outlet is longer than the duct length from the opening to the front seat foot outlet. Since the length is long, the temperature of the warm air blown out of the rear seat foot outlet is larger than the warm air blown out of the front seat foot outlet due to heat radiation from the duct. For this reason, there is a problem that if the blow-out air temperature is set so as to be a comfortable temperature for the front-seat passenger, the rear-seat passenger feels cold. The present invention has been made on the basis of the above circumstances, and an object of the present invention is to provide a vehicle air conditioner that can improve the heating sensation of a rear occupant as well as a front occupant.

[0004]

According to the first aspect of the present invention, a partition plate is provided on the leeward side of the ventilation opening in the foot duct, so that much of the high-temperature air passing through the ventilation opening can be removed from the rear seat foot. The air can be sent to the outlet, and much of the low-temperature air passing through the ventilation opening can be sent to the front seat side foot outlet. Thus, the temperature of the air that passes through the ventilation opening and is supplied to the rear seat side foot outlet becomes higher than before, so that the heating capacity of the rear seat side can be improved.

According to a second aspect of the present invention, a rear foot duct for connecting the ventilation port and the rear foot foot outlet through a front foot duct for connecting the ventilation port and the front foot foot outlet is provided. Has a longer overall length. Therefore, the amount of heat radiation of the air flowing through the rear foot duct is larger than that of the air flowing through the front foot duct due to the longer duct length. Most of the high-temperature air that passes through is sent to the rear-seat foot outlet, and much of the low-temperature air that passes through the ventilation holes is sent to the front-seat foot outlet. And the temperature difference between the outlet air temperature at the foot outlet at the rear seat side and the outlet air temperature at the rear seat side can be made smaller than before. As a result, it is possible to give the rear passenger the same feeling of heating as the front passenger.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a vehicle air conditioner according to the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of a cooler / heater integrated unit of a vehicle air conditioner.
As shown in FIG. 4 (overall schematic diagram), the vehicle air conditioner 1
The air conditioner includes a blower unit 2 for generating blown air, and a cooler / heater integrated unit 3 (hereinafter, referred to as an air-conditioning unit 3) for adjusting the temperature of the air sent from the blower unit 2 and sending the air into the vehicle interior. It is arranged below a front instrument panel (not shown).

The blower unit 2 comprises a blower case 5 integrally provided with an inside / outside air switching box 4, a centrifugal fan 6 housed in the blower case 5, and a blower motor 7 for driving the centrifugal fan 6 to rotate. The inside / outside air switching box 4 has an inside air inlet 8 for introducing air (inside air) in the vehicle compartment,
An outside air introduction port 9 for introducing air (outside air) outside the vehicle compartment is formed, and an inside / outside air switching door 10 for selectively opening and closing the inside air introduction port 8 and the outside air introduction port 9 according to a suction port mode.
Are rotatably supported.

The air conditioning unit 3 includes a unit case 11 connected to the blower case 5, an evaporator 12 disposed on the upstream side (upwind side) in the unit case 11, and a downstream (downwind side) of the evaporator 12 in the unit case 11. , An air mix door 14 for adjusting the temperature of the blown air, and outlet switching doors 15 and 16 for switching the discharge direction of the blown air.

In the unit case 11, a first air passage (indicated by a solid arrow D in FIG. 1) through which the air passing through the evaporator 12 flows through the heater core 13, and the air passing through the evaporator 12 passes through the heater core 13. A second ventilation path (shown by a solid arrow E in FIG. 1) that flows by bypass is provided. The unit case 11 is provided with a plurality of air discharge ports (a defroster discharge port 17, a front face discharge port 18, a rear face discharge port 19, a front foot discharge port 20, and a rear foot discharge port 21). Each of the discharge ports 17 to 21 is a duct 22
To 26 (see FIG. 4) and communicate with a plurality of outlets opening into the vehicle interior. The outlet is as shown in FIG.
A defroster outlet 27 that blows air toward the windshield, a front face outlet 28 that blows air toward the upper body of the front passenger, a rear face outlet 29 that blows air toward the upper body of the rear passenger, a front passenger. And a rear foot outlet 31 for blowing air toward the feet of the rear occupants.

The front face discharge port 18
And the rear face discharge port 19 are provided by branching from a face opening 32 that opens upstream (upwind) of each of the discharge ports 18, 19. The front foot discharge port 20 and the rear foot discharge port 21 , 21 are branched from a foot opening 33 (see FIG. 2) that opens upstream (upwind). However, the foot opening 33 is formed by air (hot air) passing through the first air passage and air (cold air) passing through the second air passage.
Are provided at positions where they flow in a substantially two-layer state.

Downstream of the foot opening 33, as shown in FIG. 2, a first opening 33a communicating with the foot opening 33 to the rear foot discharge port 21 and a second opening 33b communicating with the front foot discharge port 20 are provided. A partition plate 34 is provided. The partition plate 34 is provided so as to partition between hot air and cold air that pass through the foot opening 33 in substantially two layers. However, both ends of the partition plate 34 are connected to the first opening 33.
The second opening 33b is provided so as to be curved so as to be gradually larger than a. Therefore, at a substantially central portion of the foot opening 33 along the line AA in FIG. 2, the opening areas of the first opening 33a and the second opening 33b are substantially equal, as shown in FIG. At both sides of the foot opening 33 along the line BB in FIG. 2, the first opening 33a is formed as shown in FIG.
The opening area of the second opening 33b is larger than that of the second opening 33b. At both ends of the foot opening 33 along the line CC in FIG.
As shown in (c), only the second opening 33b is open.

The evaporator 12 is a functional component of a known refrigeration cycle, and cools the air sent from the blower unit 2 by heat exchange with a low-temperature and low-pressure refrigerant flowing therein. The heater core 13 is connected to a cooling water circuit (not shown) of the engine by a hot water pipe (not shown), and heats air passing through the heater core 13 using high-temperature cooling water supplied from the engine as a heat source. The air mix door 14 adjusts the ratio between the amount of air passing through the heater core 13 and the amount of air bypassing the heater core 13 to change the temperature of the blown air. The outlet switching doors 15 and 16 are a defroster door 15 for opening and closing the defroster discharge port 17 and a face / foot door 16 for switching between a face opening 32 and a foot opening 33.

Next, the operation of this embodiment will be described. The foot mode is set and the face / foot door 16 opens the foot opening 33 (closes the face opening 32).
After the blast air supplied from the blower unit 2 passes through the evaporator 12, the blast air passes through the first ventilation path and the second ventilation path and passes through the foot opening 33 according to the opening degree of the air mixing door 14. . At this time, the air passing through the foot opening 33 flows through the heater core 13 while the hot air heated when passing through the heater core 13 and the cold air bypassing the heater core 13 flow in a substantially two-layer state. Most of the hot air passing through the rear foot outlet 2
1 to the rear foot outlet 31 through the duct 26
It is blown out to the feet of the rear passengers. On the other hand, much of the cold air passing through the foot opening 33 is sent to the front foot outlet 20 by the partition plate 34 and blown out from the front foot outlet 30 to the feet of the front occupant through the duct 25.

(Effects of this embodiment) In this embodiment,
Since the air conditioning unit 3 is disposed below the instrument panel in front of the vehicle cabin, the length of the air passage from the foot opening 33 provided in the unit case 11 of the air conditioning unit 3 to the front foot outlet 30 is The length of the air passage from the foot opening 33 to the rear foot outlet 31 is longer. Therefore, the amount of heat radiation of the warm air flowing through the duct 26 is larger than that of the warm air flowing through the duct 25 due to the length of the ventilation passage, but most of the high-temperature air passing through the foot opening 33 is discharged from the rear foot outlet. Sent to 21,
Since much of the low-temperature air passing through the foot opening 33 is sent to the front foot outlet 30, the air blown out from the front foot outlet 30 and the air blown out from the rear foot outlet 31 have substantially the same temperature. Can be As a result, the rear passengers can be given the same feeling of heating as the front passengers, so if the outlet air temperature is set so that a comfortable heating feeling is obtained for the front passengers, the rear passengers will also have the same feeling. A comfortable feeling of heating can be given.

[Brief description of the drawings]

FIG. 1 is a sectional view of an air conditioning unit.

FIG. 2 is a plan view of a foot opening.

3A is a sectional view taken along line AA of FIG. 2, FIG. 3B is a sectional view taken along line BB of FIG. 2, and FIG. 3C is a sectional view taken along line CC of FIG.

FIG. 4 is an overall schematic diagram of a vehicle air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vehicle air conditioner 13 Heater core (heater) 14 Air mix door 16 Face / foot door (foot door) 25 Duct (front seat side foot duct) 26 Duct (rear seat side foot duct) 30 Front foot outlet (front seat side foot) Outlet) 31 rear foot outlet (rear seat side foot outlet) 33 foot opening (air vent) 34 partition plate

Claims (4)

[Claims] A heater for heating the air, a first airflow path through which the air flows, a second airflow path around which the air flows bypassing the heater, and a first airflow path. A ventilation opening through which the high-temperature air flowing through the ventilation path and the low-temperature air flowing through the second ventilation path pass in a substantially two-layer state; a front-seat side foot outlet that blows air toward the feet of the front-seat occupant; A rear-seat-side foot outlet that blows air toward the feet of a rear-seat occupant; the air that has passed through the ventilation opening is branched in two directions, and one of the air is directed to the front-seat-side foot outlet. A foot duct that guides the other air to the rear seat side foot outlet, and is provided on the leeward side of the ventilation port in the foot duct, and transfers a large amount of high-temperature air passing through the ventilation port to the rear seat side. Sends much of the low-temperature air passing through the ventilation openings to the front feet Air conditioning system is characterized in that a partition plate to be sent to the air outlet. 2. The foot duct includes a front seat duct that communicates the ventilation port with the front seat foot outlet, and a rear seat side that communicates the ventilation port with the rear seat foot outlet. The vehicle air conditioner according to claim 1, wherein the rear seat-side foot duct has a longer overall length than the front seat-side foot duct. 3. The air conditioner for a vehicle according to claim 1, wherein a foot door for opening and closing the ventilation port is provided on the windward side of the ventilation port. 4. An air mixing door for adjusting a ratio between an amount of air flowing through the first air passage and an amount of air flowing through the second air passage.
4. The air conditioner for a vehicle according to any one of claims 3 to 5.