JPS5848891Y2 - Vehicle air conditioner - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an air conditioner for a vehicle, and more particularly to an air conditioner for a vehicle having a pie level mode in which heater blowout and ventilator blowout function simultaneously.

FIG. 1 and FIG. 2 are explanatory diagrams showing a conventional vehicle air conditioner.

An outside air suction port 3 and an inside air suction port 4, which are switched by an inside/outside air switching damper 2, are opened on the upstream side of the main duct 1, and a motor 5 and a fan 6 are arranged on the downstream side thereof.

An evaporator 7 as a heat exchanger and a heater core 8 are further arranged on the downstream side of the fan 6, and an air square damper 9 is arranged on the upstream side of the heater core 8 so as to be able to control the temperature.

The downstream side of the main duct 1 is an air mix chamber 10 that also serves as a ventilation distribution chamber, and the air mix chamber 10 has a heater outlet 12 via a heater damper 11 and a defroster outlet 14 via a defroster damper 13. ,
Ventilator air ducts 16 are provided via ventilator dampers 15, respectively.

Note that the ventilator air duct 16 is provided with a ventilator center outlet 17, a ventilator right side outlet 18, and a ventilator left side outlet 19, and each outlet is provided with a blowout air volume adjusting damper 20, respectively.

In such a conventional vehicle air conditioner, four modes can be set: a differential mode, a heater mode, a vent mode, and a pie level mode as shown in Table 1.

In other words, in the differential mode, the heater damper 11''
-/JX is opened and the defroster damper 13 is opened, and in the heater mode, the heater damper 11 is opened and the defroster damper 13 is slightly opened, and the temperature-controlled air is directed to the heater outlet 12 and the defroster damper 13. Air is blown from the air outlet 14.

Further, in the vent mode, the defroster damper 13 is closed and the ventilator damper 15 is opened,
Ventilator air duct 1 provides temperature-controlled air
6 and is blown out from each outlet 17, 18, 19 (note that the defroster outlet 14 is closed by the ventilator damper 15 at this time).

Furthermore, in pie level mode, heat damper 1
1 and the ventilator damper 15 are opened, and the defroster damper 13 is closed, so that temperature-controlled air is blown out from each of the air outlets 17, 18, and 19 via the heater air outlet 12 and the ventilator air duct 16. It has become.

Fig. 3 is an explanatory diagram showing the Kel heater blowout temperature and the bench beta blowout temperature in this pie level mode. The pie level mode in such a vehicle air conditioner can function as the same temperature pie level in the middle season and at night, allowing both the heater blowout and the vent blowout to function at the same time. There is a problem in that it is not possible to provide a pie-level function such as creating a large difference between the blowout temperature and cooling the head and feet.

This invention was devised in view of the above-mentioned conventional problems, and the purpose of this invention is to provide a vehicle air conditioner that also has a pie level mode that provides a large temperature difference between the heater outlet temperature and the ventilator outlet temperature. shall be.

In order to achieve the above object, this invention arranges a cooling heat exchanger in the main duct, and connects the heater outlet via the heater damper to the downstream side of the heat exchanger, and the defroster outlet via the defroster damper to the downstream side of the heat exchanger. In a vehicle air conditioner having a ventilator outlet via a ventilator damper, the outlet is located upstream of a cooling heat exchanger in the main duct,
A bypass duct is provided which communicates with the ventilator outlet via a bypass damper.

Hereinafter, embodiments of this invention will be described with reference to the drawings.

FIG. 4 is an explanatory view showing one embodiment of the vehicle air conditioner according to this invention, and the same members as in the conventional example are denoted by the same reference numerals and the explanation thereof will be omitted.

This embodiment differs from the conventional example in that the main duct 1 upstream of the evaporator 7 is opened and closed by a bypass damper 21, and the ventilator air duct 1 is opened and closed by a bypass damper 21.
6 is connected to the bypass duct 22.

That is, when the bypass damper 21 is opened,
The air sent by the fan 6 is sent directly to the ventilator air duct 16 via the bypass duct 22 before being heat exchanged by the evaporator 7 or the heater core 8, and is sent from each suction 017, 18, 19 into the vehicle interior. It is designed to be sucked out.

Next, the operation of the above embodiment will be explained with reference to Table 2.

When this air conditioner is set to any one of the differential mode, heater mode, and vent mode, the bypass damper 21 is closed and the other dampers are operated in the same manner as in the conventional example. Activation is performed.

Further, when the pie level mode I is set, the bypass damper 21 is closed, and the other dampers are operated in the same manner as in the pie level mode of the conventional example, and as in the conventional example, as shown in FIG. Temperature-controlled air is blown out from the heater outlet and the ventilator outlet to perform the same temperature pie level function.

Next, when the pie level mode ■ is set, the heat damper 11 is opened, the defroster damper 13 is slightly opened, the ventilator damper 15 is closed, and the bypass damper 21 is opened, so as shown in FIG. Temperature-controlled air is blown out from the heater outlet so that the
Outside air without heat exchange is directly blown out from the ventilator outlet.

That is, according to the above embodiment, it is possible to provide the functions of pie level mode I and pie level mode H in addition to the differential mode, heater mode, and vent mode.

Therefore, use pie level mode I as a same temperature pie level mainly in the middle seasons such as spring, autumn and nighttime, and use pie level mode ■ as a cold head and foot heating that prevents sleep and awakening as in winter when there is solar radiation. becomes possible.

Further, in the above embodiment, the ventilator air duct 1 is provided between each ventilator outlet and the bypass duct 22.
6 is also installed, the installation length of the bypass duct 22 is short.

Further, in the air conditioner in the above embodiment, a case has been described in which the temperature is controlled by an air mix method, but the air conditioner may be controlled by a water valve control method.

As described above, this idea places a heat exchanger in the main duct, and connects the heater outlet via the heater damper, the defroster outlet via the defroster damper, and the ventilator damper on the downstream side of the heat exchanger. In a vehicle air conditioner equipped with a ventilator outlet, a bypass duct that communicates with the ventilator outlet via a bypass damper is installed on the upstream side of the heat exchanger in the main duct. This has the effect that it is possible to provide a vehicle air conditioner that has both a pie level function with a large temperature difference and a pipe level function with a large temperature difference.

[Brief explanation of drawings]

Fig. 1 is a suggested cross-sectional view showing a conventional vehicle air conditioner, Fig. 2 is a suggested cross-sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is a line diagram showing the isothermal pie level blowing state. FIG. 4 is a schematic cross-sectional view showing an embodiment of the vehicle air conditioner according to the invention, and FIG. 5 is a diagram showing a pie-level blowing state with a large temperature difference. 1... Main duct, I... Evaporator, 8... Heater core, 11... Heater damper, 12... Heater outlet, 13. ...
... Defroster damper 14 ... Defroster outlet, 15 ... Ventilator damper, 16 ...
... Ventilator air duct, 21 ... Bypass damper 22 ... Bypass duct.

Claims (1)

[Scope of utility model registration request] A cooling heat exchanger is arranged in the main duct, and on the downstream side of the heat exchanger, a heater outlet is connected via a heater damper, a defroster outlet is connected via a defroster damper, and a ventilator outlet is connected via a ventilator damper. What is claimed is: 1. A vehicle air conditioner comprising: a bypass duct that communicates with a ventilator outlet via a bypass damper upstream of a cooling heat exchanger in the main duct.