JPS6326966Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a so-called reheat air mix type vehicle air conditioner, and is particularly intended to improve the air mixing means.

As is well known, this type of vehicle air conditioner adjusts the temperature of the blown air by adjusting the opening degree of an air mixer door, and a conventional example thereof is shown in FIG.

In FIG. 1, a blower 3 and an evaporator 4 are arranged in a main passage 2 of an air conditioning case 1, and as the blower 3 rotates, air sucked in from an inlet 5 passes through the evaporator 4 and is sent to the downstream side. It's starting to become easier. The downstream side of this main passage 2 is divided into a heating passage 6 and a non-heating passage 7. The heater core 8 is disposed in the heating passage 6 to heat the blown air, while the non-heating passage 7 guides the blown air as it is to the downstream side, and the heating passage 6 and the non-heating passage An air mix door 10 is provided at the inlet section 9 where the air passage 7 is separated, and the ratio of air passing through the heating passage 6 and the non-heating passage 7 is adjusted by the degree of opening thereof. Further, at the outlet section 17 where the heating passage 6 and the non-heating passage 7 join together again, the air that has passed through the heating passage 6 and the non-heating passage 7 is mixed as shown.

However, while the air passing through the heating passage 6 is subjected to resistance by passing through the heater core 8, the air passing through the non-heating passage 7 is not subjected to any resistance, resulting in a speed difference between the two. Difficult to mix. This is particularly noticeable when the heating passage 6 is bent in a detour as shown in the figure, and the main passage 2, non-heating passage 7, and upper outlet passage 18 are located in a straight line. Therefore,
During air mixing, cold air and warm air are not sufficiently mixed, and the air that has passed through the upper air outlet passage 18 while being separated into cold air and warm air is blown into the passenger compartment, causing discomfort to the occupants. Ta.

The object of this invention is to solve the problem that the temperature distribution of the blown air becomes uneven due to insufficient air mixing as described above. The most distinctive feature of this invention is that an air mix door is installed at the entrance where the heating passage, where the heater core is placed and heats the blown air, and the non-heating passage, which directs the blown air directly to the downstream side, are separated. and adjusting the proportion of air passing through the heating passage and the non-heating passage, and mixing the air passing through the heating passage and the non-heating passage at an exit section where the heating passage and the non-heating passage merge again. In the vehicle air conditioner, a wind direction changer is provided on the surface of the air mix door on the side of the non-heating passageway, and the air direction changer has a wing section extending parallel to the air mix door or at a slight angle, so that the air mix door is connected to the heating passage and the non-heating passage. When both heating passages are opened, the direction of air passing through the non-heating passage is directed toward the heating passage side of the outlet portion. Therefore, when the air mix door opens both the heating passage and the non-heating passage,
Since the fast air passing through the non-heating passage collides with the slow air passing through the heating passage, the two are sufficiently mixed, and the above object can therefore be achieved.

Examples of this invention will be described below with reference to the drawings.

2 and 3, an embodiment of this invention is shown, and a blower 3 and an evaporator 4 are arranged in a main passage 2 formed on the upstream side in an air conditioning case 1. By rotating 3, the suction port 5
Selected air from the inside or outside air to the main passage 2
The liquid is sucked into the air, passed through an evaporator 4, and sent to the downstream side. The evaporator 4 cools the air passing through it when the evaporator 4 is in operation.

The downstream side of the main passage 2 is divided into a heating passage 6 and a non-heating passage 7. The heating passage 6 is formed in a U-shape with a heater core 8 disposed therein, and heats the blown air to pass through it, while the non-heating passage 7 is formed on a straight line following the main passage 2. The blown air is directly guided to the downstream side.

The heating passage 6 and the non-heating passage 7 are separated by an entrance portion 9, and an air mix door 10 is provided at the entrance portion 9. This air mix door 10 is rotatable about a support shaft 11, and adjusts the ratio of air passing through the heating passage 6 and the non-heating passage 7 by its opening degree.

The air direction changer 12 is connected to the air mix door 10.
For example, screws 13, 13 are attached to the side surface on the non-heating passage 7 side.
has been fixed through. This wind direction changer 12
A support part 14 vertically rising from the center of the air mix door 10 is provided with a plurality of wing parts 15, and air passage grooves 16 are formed between the wing parts 15. The wing portion 15 is either parallel to the air mix door 10 or at a slight angle. Therefore, when the air mix door 10 opens both the heating passage 6 and the non-heating passage 7 (during air mixing), the direction of the air passing through the non-heating passage 7 is directed toward the heating passage 6 side of the outlet section 17 described below. .

The heating passage 6 and the non-heating passage 7 are connected to an outlet portion 17.
The air passing through the heating passage 6 and the non-heating passage 7 may be mixed at the outlet portion 17. That is, the upper outlet passage 18 is connected to the outlet section 17, and the defrost outlet passage 19 and the lower outlet passage 20 are connected in the middle of the heating passage 6, and the upper outlet passage 18 is opened and closed. A door 21 and a mode door 22 that opens and closes the defrost outlet passage 19 and the lower outlet passage 20 are provided, the mode door 21 opens the upper outlet passage 18, and the mode door 22 opens the upper outlet passage 18 and the lower outlet passage Air is mixed at the outlet section 17 when the outlet passage 20 is closed (in cooler mode). Air is then directed into the passenger compartment through the upper air outlet passage 18 to the vicinity of the occupant's face, through the defrost air outlet passage 19 to the windshield, and through the lower air outlet passage 20 to the vicinity of the occupant's feet. It is configured to be blown out.

In the above configuration, when in the cooler mode as shown in FIG. It is cooled and becomes cold air. This cold air is divided into those that pass through the heating passage 6 and the non-heating passage 7 depending on the opening degree of the air mix door 10.
The mixture is mixed and the temperature is adjusted, and the mixture is blown into the vehicle interior through the upper air outlet passage 18. At this time, the direction of a part of the cold air passing through the non-heating passage 7 is changed to the heating passage 6 side according to the direction of the blade part 15 of the wind direction changer 12, so that it passes through the heating passage 6 at the outlet part 17. It collides at a large angle with the warm air that has been flowing. Therefore, in this outlet section 17, both the cold air and the hot air are mixed in a turbulent flow, so that the mixing is sufficiently performed.

As described above, according to this invention, since the air mix door is equipped with a wind direction changer that changes the direction of air passing through the non-heating passage to the heating passage side during air mixing, the air is mixed sufficiently and the blown air is Temperature distribution can be made uniform. Furthermore, since the blown air hits the air mixer and receives a large moment during air mixing, there is no play in the operating system such as a link mechanism that moves the air mixing door, and the air mixing door can be operated accurately. Furthermore, this invention has the advantage that it can be applied to conventional air conditioners by the simple means of providing a wind direction changer in the air mix door.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a conventional air conditioner, Fig. 2 is a cross-sectional view of the air conditioner according to the present invention, and Fig. 3 is a perspective view of an air mix door equipped with a wind direction changer. 6... heated passage, 7... non-heated passage, 8... heater core, 9... inlet, 10... air mix door, 12... wind direction changer, 17... outlet.

Claims (1)

[Scope of utility model registration request] An air mix door is provided at the entrance where a heating passage in which a heater core is arranged to heat the blown air and a non-heating passage that directs the blown air directly to the downstream side are separated, so that the heating passage and the non-heating passage pass through. In the vehicle air conditioner, the proportion of air passing through the heating passage and the non-heating passage is mixed at an exit portion where the heating passage and the non-heating passage join together again. A wind direction changer having a wing portion extending parallel to or at a slight angle with the air mix door is provided on a side surface, and when the air mix door opens both the heating passage and the non-heating passage, the non-heating passage is opened. A vehicle air conditioner characterized in that the direction of passing air is directed toward the heating passage side of the outlet section.