JPS6114962B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air conditioner for an automobile equipped with a humidifier, in which a humidifier is provided in a bypass passage that bypasses at least one heat exchanger and is guided to an upper outlet passage. This is related to the control method.

In an air conditioner for an automobile in which a humidifier is provided in a bypass passage that bypasses at least one heat exchanger of the air conditioner and is led to an upper outlet passage,
Conventionally, the humidifier was operated manually, but when humidification was required, humidified air was constantly blown out from the upper outlet, resulting in excessive humidification around the face, and in some cases. There were times when I felt uncomfortable.

Therefore, in the present invention, even when the operation of the humidifier is started manually or automatically, the humidifier is operated periodically so that humidified air is intermittently blown out from the upper outlet. This makes it possible to humidify the interior of the vehicle with a comfortable feeling without causing too much humidified air near the face.

Embodiments of the present invention will be described below with reference to the drawings. The illustrated automobile air conditioner is of the so-called air mix type, and includes a cooling heat exchanger 1 on the upstream side, a heating heat exchanger 2 on the downstream side, and a heating heat exchanger 2 on the upstream side of the cooling heat exchanger 1. air mix door 3
is provided, and the temperature is appropriately controlled by the opening degree of the air mix door 3. Further, an outside air inlet 4 and an inside air inlet 5 are formed on the most upstream side, and inside and outside air is selected by an inside and outside air switching door 6.
This selected air is sucked into the main passage 9 of the air conditioning case 8 by the rotation of the blower 7, and is sent to the downstream side. The temperature is appropriately controlled by the cooling heat exchanger 1, the heating heat exchanger 2, and the air mix door 3, and the air is transferred to the doors 10, 1.
1, and is blown into the vehicle interior from the upper outlet 14, the defrost outlet 15, or the foot outlet 16 via the upper outlet passage 13.
Although the doors 10 and 11 are not shown, they are moved appropriately depending on each mode.

The bypass passage 17 branches from the main passage 9 downstream of the cooling heat exchanger 1 and upstream of the heating heat exchanger 2, bypasses the heating heat exchanger 2, and bypasses the heating heat exchanger 2.
Reference numeral 7 denotes an upper air outlet passage 13, which is connected to the rear side of the door 10.

This bypass passage 17 is provided with a humidifier 18 and a door 19, and when the door 19 is opened or closed, the passage 1
7 and also humidifies the air passing through this passage 19 with a humidifier 18.

The actuator 20 that moves the humidifier 18 and the door 19 is operated by the output of the control circuit 21. When the humidifier operating switch 22 is closed and a start signal is input to the cycle timer 23, the humidity detector 24 detects the humidity inside the vehicle. When a humidity signal (hereinafter referred to as relative humidity) is input and the humidity is lower than the appropriate temperature, the cycle timer 23 outputs a constant periodic output signal to the control circuit 21. and the control circuit 21
An operating signal is output from the humidifier 18 and the actuator 20, and the humidifier 18 and the actuator 2
0 is operated intermittently with a constant cycle. That is, when the humidifier 18 is in operation, the actuator 2
When the humidifier 18 is not activated, the door 19 is positioned at the position indicated by the two-dot chain line in the figure.
is located at the position indicated by the solid line and serves to close the bypass passage 17. 25 is a cycle setter for the cycle timer 23. Although the humidifier 18 operates intermittently, it is controlled so that the humidified air blowing time is long when the humidity inside the vehicle is low, and becomes shorter as the humidity approaches the appropriate value. This eliminates the discomfort of constantly blowing air from the upper air outlet 14.

In this embodiment, the branch point of the bypass passage 17 is located downstream of the cooling heat exchanger 1, but as shown by the two-dot chain line in the figure, it may be provided upstream of the cooling heat exchanger 1. It is a good thing to do.

Further, this embodiment may be an embodiment without the humidity detector 24, in which case the occupant can close the switch 22 as necessary to operate the humidifier 18.
operation can be started. Even in this case, it goes without saying that the humidifier 18 is operated intermittently.

As described above, the present invention provides an air conditioner for an automobile equipped with a humidifier, in which a humidifier is provided in a bypass passage branched from an upstream side of at least one heat exchanger and connected to an upper outlet passage. Since it operates periodically, when humidification is required, humidified air is blown out from the upper outlet at appropriate intervals, resulting in an extremely good humidifying feeling. This also has the effect of eliminating the feeling of monotony.

[Brief explanation of the drawing]

The figure is a configuration diagram showing an embodiment of the present invention. 1... Cooling heat exchanger, 2... Heating heat exchanger, 17... Bypass passage, 18... Humidifier,
19...Door, 23...Cycle timer, 24...
...humidity detector.

Claims (1)

[Scope of Claims] 1. In an air conditioner for an automobile equipped with a humidifier, in which a humidifier is provided in a bypass passage branched from an upstream side of at least one heat exchanger and connected to an upper outlet passage, the humidifier is periodically installed. An air conditioner for an automobile with a humidifier, characterized in that the air conditioner is operated at 2. The air conditioner for an automobile with a humidifier according to claim 1, characterized in that the door controlling the communication of the bypass passage is also moved from closed to open in synchronization with the operation of the humidifier. Device.