JPS59153614A - Air conditioner for automobile - Google Patents

Abstract

PURPOSE:To make a by-level mode attainable as well as to improve comfortableness, by combinedly installing an air heater and an air bypass passage having an airflow adjusting damper in opposition to an airflow at the downstream side of an evaporator. CONSTITUTION:In case of an air conditioner provided with an inside and outside air damper 8, an air blower 9 and a refrigerating cycle evaporator 11 inside a duct from the upstream side in regular sequence, an air heater 12 to be made to pass engine cooling water by way of a flow control valve 13 and an air bypass passage 14 bypassing this air heater 12 are set up at the downstream side of the evaporator 11. Inside the air bypass passage 14, a damper 15 adjusting a bypass air quantity is installed interposingly. And, cold air passing through the air bypass passage 14 is blown off from a breast blowoff passage 18 having a breast damper 17 to the side of an upper half of the body of people aboard while warm air passing through the air heater 12 is blown off from a foot blow- off passage 20 having a foot damper 19 to the side of an upper half of the body of people aboard, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an air conditioner for an automobile that conditions the air inside a vehicle interior.

Structure of the conventional example and its problems As the specific structure of the conventional air conditioner is shown in FIG. The engine cooling water is reheated in the heater 3 through which it flows, and at this time, the amount of reheating is adjusted by controlling the flow rate of the engine cooling water using the flow rate control valve 4, and the air is sent to each of the air blowing passages 5 and 6 at a desired air temperature. Ah, gone. In such a configuration, the occupant's desires, i.e.,
Blows out cold air from the chest outlet passage 6 and the foot outlet passage 6
There were functional and comfort problems in that the so-called pie-level mode favored by Japanese people, in which warm air is blown out from the hood, could not be achieved.Objective of the InventionThe present invention solves the above-mentioned drawbacks of the conventional technology. It aims to improve functionality and comfort.

Structure of the Invention The present invention provides an intake section for introducing air from outside and outside the vehicle interior, an air blower for conveying the air, an evaporator installed downstream of the air blower for cooling and dehumidifying the air, and an evaporator for cooling and dehumidifying the air. a heater provided on the downstream side of the air to adjust the heating to the air according to changes in the flow rate of engine cooling water, and a heater provided on the downstream side of the evaporator facing the air-air flow and installed alongside the heater, an air bypass path that bypasses a portion of the air flow to the heater; a bypass damper provided in the air bypass path that adjusts the bypass air flow rate; and a downstream side j of the heater and the air bypass path. This is extremely advantageous in practical terms, as it is comprised of air blowing passages provided, enables pie-level mode, and thereby improves the comfort of the occupants.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 and 3. FIG. 2 shows the operating state in the pie level mode. In the figure, reference numeral 7 denotes an intake section into which air from outside and inside the vehicle enters, and by rotating an inside/outside air damper 8, selection and mixing of the intake air is performed as desired. Reference numeral 9 is a blower for conveying the intake air, which is driven by an electric motor 10. Reference numeral 11 is an evaporator of a refrigeration cycle, in which the air conveyed by the blower 9 is once cooled.

The air is dehumidified and becomes low-humidity, making it difficult for dew to form on the window glass inside the vehicle. The heater 12 may be a heater that reheats the cooled and dehumidified air to a desired air temperature.
Engine cooling water at a temperature of about 70 to 85°C flows through, and the amount of air heating can be adjusted by controlling the ON-OFF time variation of the flow rate control valve 13 or adjusting the opening. Reference numeral 14 denotes an air bypass path through which the cooled and dehumidified air flows without passing through the heater 12, and an air bypass damper 15 is provided to adjust the amount of bypass air. Reference numeral 16 denotes a barrier that prevents warm air and cold air flowing through both the air bypass passage 14 and the heater 120 passages from easily mixing together at the exits of both passages. Cold air flows from the chest blowing passage 18 having the chest damper 17 to the upper body side of the occupant, and warm air flows from the foot blowing passage 2 having the foot damper 19.
Air is blown out from zero to the lower body side of the occupant. FIG. 3 shows the operating state in the cooling mode. By closing the air bypass passage 14, opening the chest blowing passage 18, and closing the foot blowing passage 20, the occupant's upper body l141I
Cold air (maximum cooling if the heater 12 is stopped) or mild cold air (the amount of heating is adjusted by the flow control valve 13 when the heater 12 is activated) can be obtained. Reference numeral 21 is a defrost outlet passageway for preventing fogging of the window glass inside the vehicle.

In the device configured as described above, by making it possible to control the air bypass damper 15 to an arbitrary rotation angle, the air bypass damper 15 is slightly rotated to the closing side in the pie level mode, and the cold air inside the air bypass path 14 is The temperature of the cold air blown to the upper body side of the occupant can be adjusted by suppressing the flow of cold air and mixing the warm air just before the chest blowing passage 18 by that amount. In this case, fine temperature adjustment can be made by controlling the piezo damper 15 and the flow rate control valve 13.

Effects of the Invention As described above, the present invention combines a heater that opposes the air flow downstream of the evaporator and adjusts the amount of heat by controlling the flow of engine cooling water, and an air bypass passage having an air bypass damper. , a pi-level mode can be created, which is extremely advantageous in improving functionality and passenger comfort. Another feature is that delicate temperature control can be performed by finely adjusting the air bypass damper and controlling the flow rate of cooling water.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing a conventional air conditioner, FIG. 2 is a cross-sectional view showing a pie-level operating state of an automotive air conditioner according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view showing a cooling operating state of the same device. FIG. 7...Intake part, 9...Blower, 11.
...Evaporator, 12...Heater, 14...
...Air bypass path, 16...Air bypass damper, 18, 20, 21... Air blowing passage. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 3 Figure 3

Claims (1)

[Claims] an air intake unit that drifts air from outside the vehicle interior, an air blower that conveys the air, an evaporator that is installed downstream of the air blower and that cools and dehumidifies the air, and an engine that is installed downstream of the evaporator. a heater that adjusts the amount of heating to the air by changing the flow rate of cooling water; and a heater that is provided downstream of the evaporator, facing the air flow, and installed alongside the heater; an air bypass path that bypasses a part of the air flow; a bypass damper provided in the air bypass path that adjusts the bypass air flow rate; and each air blowing path provided downstream of the heater and the air bypass path. Automotive air conditioner consisting of.