JPH03189225A - Car airconditioner - Google Patents

Abstract

PURPOSE:To have air-conditioning control for the rear seats independently from that for the front seats in good performance by mixing warm wind with cold winds fed from lead-in parts arranged over and under a heating means, adjusting the proportion of their wind quantities, and thereby controlling the temp. of the air stream sent out of a blowout hole which opens toward the rear seats. CONSTITUTION:When wind is sent to a rear duct 17 while a heater unit 1a is set for e.g. in max. cooling position, No.1 and No.2 air mix damper 3, 4 have been adjusted in the respective positions 3-a, 4-a. The cooled air is divided into a flow path directed as it is toward blowout holes 7-9, a flow path directed toward the rear duct 17 as cold wind 23 via No.1 wind delivery hole 6, and a flow path directed toward a heater core 2 upon passing through a cold wind bypass 14. Then the air with the temp. adjusted according to the opening/closing condition of another air mix damper for the rear, not illustrated, is sent to a rear vent blowout hole 18 and a rear heat blowout hole 19 in accordance with the setting of a rear mode changeover damper 20.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a vehicle air conditioner, and particularly to one provided with a duct for distributing air to a passenger in a rear seat of a vehicle.

[Conventional technology]

Vehicle air conditioners control the temperature of the airflow blown into the vehicle interior by appropriately mixing cold air cooled by a refrigeration cycle device with warm air heated using heat from hot water, etc. ing.

Conventionally, for example, as disclosed in Japanese Utility Model Publication No. 58-28884, the above-mentioned temperature-controlled airflow is applied to the foot area of the passenger in the front seat of the vehicle, the head area, and the rear of the vehicle. The air is distributed so as to be directed toward the feet, head, etc. of the occupant in the seat. In this case, air is distributed to the feet or head of the occupant in the rear seat of the vehicle by the action of the damper 7.8 provided in the air conditioning unit 1, as shown in FIG. When blowing air to the feet or the head, it is common to introduce a portion of the air. That is, in FIG. 6, air is distributed to the feet of the occupants in the rear seats of the vehicle by ventilating through the foot duct 15 from a branch point provided downstream of the HEAT blowing rodan puff. The air distribution to the head is VENT.
Ventilation is carried out through a vent duct 16 from a branch point downstream of the blowout type damper 8.

[Problem to be solved by the invention]

However, in the above configuration, the air distribution in the rear seats of the vehicle is determined by the settings of the damper 7.8 on the air conditioning unit 1 side. In other words, if VENT mode is set to blow air only to the passenger's head in the front seat of the vehicle, even if the passenger in the rear seat wants air to be blown to the passenger's feet, the VENT mode is not set to blow air to the passenger's feet. There is a problem in that the HEAT blowing rodan puff for ventilating air to the rear foot duct 15 is closed, and air is not blown to the foot area of the passenger in the rear seat.

In addition, since temperature-controlled airflow is blown to the front and rear seats of the vehicle, the front seats of the vehicle.

The temperature of the airflow blown to the rear seats is the same, and there is a problem in that an occupant in the rear seat of the vehicle cannot set the temperature of the airflow regardless of the temperature of the air blown to the front seats of the vehicle.

The present invention has been made in view of the above-mentioned problems, and is intended to enable occupants in the rear seats of a vehicle to adjust air conditioning control such as the temperature of the air being distributed to the rear seats of the vehicle, independently of occupants in the front seats of the vehicle. The purpose of the present invention is to provide a vehicle air conditioner that can perform the following functions.

[Means to solve the problem]

In order to achieve the above object, the vehicle air conditioner according to the present invention includes a cooling means for introducing air from inside and outside the vehicle interior and cooling it to produce cold air; and a cooling means for introducing and heating the cold air from the cooling means to produce warm air. and a heating means for adjusting the ratio of the amount of cold air from the cooling means and the amount of warm air from the heating means to adjust the ratio of the amount of cold air from the cooling means to the amount of warm air from the heating means to increase the air flow blown out from the first outlet opening toward the front seat in the vehicle interior. a first temperature control means for controlling the temperature; a cold air introducing section disposed upstream of the heating means and introducing a part of the cold air from the cooling means; and a cold air introducing section disposed downstream of the heating means from the heating means. A warm air introduction section introduces a part of the warm air, and the proportion of the amount of cold air introduced by the cold air introduction section and the amount of warm air introduced by the warm air introduction section is adjusted to improve the interior of the vehicle. The second air outlet controls the temperature of the air flow blown out from the second air outlet opening toward the rear seats of the vehicle.
It is characterized by comprising: temperature control means;

[Effect]

Therefore, the temperature of the air flow blown out from the second outlet opening toward the rear seat of the vehicle compartment is determined by the difference between the cold air introduced from the cold air introduction section disposed upstream of the heating means and the cold air introduced from the cold air introduction section disposed downstream of the heating means. The warm air introduced from the warm air introduction section is controlled by adjusting the air volume ratio by the second temperature control means.

〔Example〕

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

FIG. 1 and FIG. 2 are block diagrams of a vehicle air conditioner to which an embodiment of the present invention is applied, and the air conditioning unit 1 is arranged in a vehicle and is composed of a cooling unit 1b and a heater unit 1a as is known in the art. and an inside/outside air switching unit 1 that sends air inside or outside the vehicle to this air conditioning unit 1 by rotating a blower fan (in this example, a sirocco fan).
1, and a rear duct 17 that guides the air in the air conditioning unit 1 to the rear seats of the vehicle.

The air conditioning unit 1 is composed of a cooling unit 1b and a heater unit 1a.The cooling unit 1b is provided with an evaporator 1o which is a heat exchanger for cooling, and the heater unit (la) downstream of the evaporator 10 is provided with a heating unit 1a. A heater core 2 is provided as a heat exchanger for use.

The evaporator 10 constitutes a series of refrigeration cycle devices together with a compressor, a condenser, etc. (not shown), and due to the action of the refrigerant flowing inside the evaporator 10, air is blown from the inside/outside air switching unit 11 by the blower fan. Evaporator 1
0 to cool the air passing through it.

On the other hand, the heater core 2 is constantly supplied with circulating cooling water from an on-vehicle engine (not shown) in order to utilize the heat generated by the engine. Then, the airflow passing through the heater core 2 is heated by the heat of the coolant that has been warmed by cooling the engine.

Furthermore, the air cooled by the evaporator 10 is transferred to the first evaporator 2, which is disposed upstream and downstream of the heater core 2. Temperature adjustment is performed by adjusting the opening and closing states of the second air mix dampers 3 and 4 to adjust the amount of air flowing into the heater core 2. In addition, 1. The opening and closing states of the second air mix dampers 3 and 4 are adjusted by an operation knob (not shown) inside the vehicle interior or a command signal from a control device (not shown). Further, in FIG. 1, arrow 12 indicates the flow of cold air, and arrow 13 indicates the flow of warm air.

And ventilation mode for occupants in the front seats of the vehicle.

Namely HEAT mode, VENT mode, DEF
By selecting the mode and the pie level mode, the opening and closing states of the HEAT blow-off rodan buff, VENT blow-off rod damper 8DEF blow-off rod damper 9 are determined, and the above-mentioned first. The air whose temperature has been adjusted by opening and closing the second air mix dampers 3 and 4 is blown from a HEAT outlet, a VENT outlet, and a DEF outlet (not shown) provided in the front seat of the vehicle interior. For example, air is blown from the HEAT outlet toward the feet of an occupant in the front seat of the vehicle.

Further, in the heater unit 1a, there are first radial pipes on the upstream side and downstream side of the heater core 2, which lead out cold air and warm air to the rear duct 17, respectively. The second outlet ports 6, 5 are open. Note that the first outlet port 6 is configured when the first air mix damper 3 is in a fully closed state so that the cold air cooled by the evaporator 10 can be introduced at all times without being affected by the operating position of the first air mix damper 3. (In Figure 1, solid line position 3
-a) and fully open state (dotted chain line position 3 in Figure 1)
-b) is arranged on the upstream side. In addition, the second outlet port 5 is located downstream of the heater core 2 so that the warm air heated by the heater core 2 can be introduced at all times. The air mix damper 4 is disposed in a space formed by the air mix damper 4. Furthermore, even if the first air mix damper 3 is controlled to the fully closed position 3-a, the heater core 2
A cold air bypass passage 14 is provided that constantly bypasses cold air to the heater core 2 so that warm air can be supplied to the second outlet 5 through the heater core 2 . Note that the second outlet 5 has an opening area larger than the first outlet 6, for example, about twice, in consideration of the large ventilation resistance of the heater core 2.

As shown in FIG. second outlet 6,
5, one end of a rear duct 17 for distributing air to the rear seats of the vehicle is fitted.

Next, air distribution to the rear duct 17 will be explained using FIG. 4. In Fig. 4, heater unit la is at MAX.
When set to C00L, the first air mix damper 3 is adjusted to the 3-a position in the figure, and the second air mix damper 4 is adjusted to the 4-a position in the figure.

The air cooled by the evaporator is directly sent to the blowout lower,
8.9, and the cold air 2 through the first outlet 6.
3, a flow path is sent out to the rear duct 17, and a flow path is ventilated to the heater core 2 through the cold air bypass passage 14. Note that the air passing through the heater core 2 is turned into warm air by the heater core 2, and since the second air mix damper 4 is controlled to the 4-a position, all the air is turned into warm air 22 through the second outlet 5. It is sent to the rear duct 17 as a.

One end of the rear duct 17 is configured with a cold air introduction port that is inserted into the first outlet 6 and a warm air introduction boat that is inserted into the second outlet 5. The mixing ratio of cold air and warm air is adjusted depending on the open/closed state, and the temperature of the airflow distributed to the rear seats of the vehicle is adjusted to a desired temperature. Note that the open/close state of the rear air mix damper 21 is adjusted by, for example, an operation knob (not shown) provided on a rear seat in the vehicle interior.

The air whose temperature has been adjusted to 11 degrees depending on the open/closed state of the rear air mix damper 21 is ventilated through the rear duct 17 and is blown toward the occupants in the rear seats of the vehicle from the air outlet provided at the other end of the rear duct 17. Ru. Same rear duct 1
7 The other end has a rear VENT outlet 18 and a rear HEA
T air outlets 19 are provided, and these rear air outlets 18
．． Air is distributed to the rear duct 19 by setting a mode switching damper 20 disposed at the other end of the rear duct 17.

The rear mode switching damper 20 has a T-shaped structure whose opening/closing state is controlled by, for example, an operation by an occupant in the rear seat of the vehicle. As shown in FIGS. 3(a) to 3(d), each ventilation mode of rear VENT mode, rear pie level mode, shut mode, and rear HEAT mode can be selected by the T-shaped rear mode switching damper 20. For example, if a rear seat passenger wants to blow air to their feet,
If the rear HEAT mode is selected and the rear mode switching damper 20 is controlled to the state shown in FIG. Air is blown towards the area.

By configuring as described above, air conditioning control (temperature, ventilation mode, etc.) for the rear seats of the vehicle can be performed separately from air conditioning control for the front seats of the vehicle. The opening area of the first and second outlet ports 6.5 can be freely set depending on whether or not to control the air conditioning with priority given to the rear seats. It is desirable that the ratio of the airflow to the seats and the airflow to the rear seats be approximately 2=1.

Next, as another embodiment of the present invention, instead of providing the rear air mix damper 21, first and second outlet ports 6 are provided.
．． 5 may each be provided with a damper for adjusting the amount of airflow, and the two dampers may be linked to adjust the amount of airflow at the first and second outlet ports 6, 5, thereby controlling the temperature. This one is this first one. By closing the two dampers provided at the second outlet 6.5, air distribution to the rear duct 17 can be completely shut off.

Further, as shown in FIG. 5, if a fan blower 24 is provided in the rear duct 17 to forcibly distribute wind to the rear seats, the first. The opening area of the second outlet 6°5 can be reduced.

〔Effect of the invention〕

As detailed above, according to the vehicle air conditioner of the present invention,
An excellent effect is that the occupant in the rear seat of the vehicle can adjust the air conditioning control such as the temperature of the air when distributing air to the rear seat of the vehicle, independently of the occupant in the front seat of the vehicle.

[Brief explanation of drawings]

1 and 2 are configuration diagrams of a vehicle air conditioner to which an embodiment of the present invention is applied, FIGS. 3(a) to 3(d) are diagrams for explaining the rear ventilation mode, and FIG. 4 is a diagram showing the rear duct 17. 5 is a configuration diagram of a vehicle air conditioner to which an uninvented embodiment is applied. FIG. 6 is a diagram illustrating conventional air distribution to the rear seats of a vehicle. . 1... air conditioning unit), 4a... heater unit, 1
b...Cooling unit, 2...Heater core, 3
...First air mix damper, 4...Second air mix damper, 5...Second outlet (warm air side), 6
...First outlet (cold air side), 7...HEAT blowout damper, 8...VENT blowout damper...
Evaporator. 14... Cold air bypass passage, 17... Rear duct 1
8...Rear VENT outlet, 19...Rear HEAT
Blowout 0.20...Rear mode switching damper, 21...
・Rear air mix damper, 24...Fan blower.

Claims (2)

[Claims] (1) A cooling means that introduces air from inside and outside the vehicle interior and cools it to produce cold air; a heating means that introduces the cold air from the cooling means and heats it to produce warm air; and an amount of cold air from the cooling means. a first temperature control means for controlling the temperature of an air flow blown out from a first outlet opening toward a front seat in the vehicle interior by adjusting a proportion of the amount of warm air from the heating means; a cold air introduction section that is arranged upstream of the means and introduces a portion of the cold air from the cooling means; a warm air introduction section that is arranged downstream of the heating means that introduces a portion of the warm air from the heating means. and adjusting the ratio of the amount of cold air introduced by the cold air introduction part and the amount of warm air introduced by the warm air introduction part, from a second air outlet opened toward the rear seats in the vehicle interior. A vehicle air conditioner comprising: a second temperature control means for controlling the temperature of the air flow blown out. (2) A vehicle according to claim 1, characterized in that a bypass passage is provided for always supplying the cold air to the heating means so as to always introduce warm air from the warm air introducing portion through the heating means. Air conditioner.