JPS6232890Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an air conditioner that performs air conditioning such as heating in automobiles, and in particular relates to a so-called three-layer flow air conditioner in which a bypass path is formed on both sides of a heater core. It is.

[Conventional technology]

Conventionally, in this type of air conditioner, as shown in FIGS. 1 and 2, both the upper and lower air mix dampers 3 and 4 have a straight shape, and the rotation center position 3a,
4a was located at a position that protruded from the width of the heater core 1 in the height direction. In addition, the upper and lower air mix dampers 3 and 4 are designed to prevent air leakage from the center positions 3a and 4a in the fully closed state (indicated by solid lines in the diagram).
Seal wall 2-1 adjacent to rotation center 3a, 4a,
They needed 2-2.

[Problem that the invention attempts to solve]

However, due to their structure, these seal walls 2-1 and 2-2 remain as resistors in the bypass paths 6 and 7 even when the air mix dampers 3 and 4 are opened (the state shown by the dashed line in the figure). Therefore, even when the air mix dampers 3 and 4 are fully open, the flow area areas A and B of the bypass passages 6 and 7 are unnecessarily narrowed, resulting in a problem that the air volume decreases at maximum cooling.

The present invention was devised in view of the above points, and an object of the present invention is to increase the flow area of the bypass passage when the air mix damper is fully opened, thereby reducing ventilation resistance.

[Means for solving problems]

In order to achieve the above object, the present invention includes a case forming an air flow path and a heater core disposed within the case to heat the air, and bypassing the heater core to flow air to both sides of the heater core. In an automobile air conditioner provided with a bypass path, a first air mix damper and a second air mix damper are provided to open and close the two bypass paths, respectively, and at least one of the first and second air mix dampers is provided. A bent part bent toward the side surface of the heater core is formed in one of the parts on the rotation center side, and the damper rotation center provided at the tip of this bent part is set within the range of the projected area of the heater core in the air flow direction. A technical means is adopted in which a seal wall adjacent to the center of rotation of the air mix damper is disposed within the projected area of the heater core in the air flow direction.

[Effect]

According to the above technical means, since the rotation center and the seal wall of at least one of the first and second air mix dampers are located within the projected area of the heater core in the air flow direction, the air mix damper is fully opened. At times, the rotation center and the seal wall do not protrude into the bypass path, and the flow area of the bypass path can be expanded compared to the conventional structure.

〔Example〕

An embodiment of the present invention will be described below based on the drawings.

In FIGS. 3 and 4, reference numeral 1 denotes a heater core that guides cooling water from the engine and exchanges heat with the air. This heater core 1 is fitted into a holding part 8 integrally formed with a resin case 5 through a seal packing. fixed by the formula, and bypass paths 6,
7 is provided. In addition to the function of holding the heater core 1, the holding part 8 also has the function of sealing the side surface of the heater core 1. Reference numerals 3 and 4 denote air mix dampers that open and close the bypass paths 6 and 7, respectively, and the rotation centers (shafts) 3-a and 4-a of the dampers 3 and 4 are rotatably provided in the case 5. and the center of rotation 3-a, 4
The dampers 3 and 4 are operated in conjunction with each other by a link device (not shown) disposed on the axial extension of the case 5 and outside the case 5, and both dampers 3 and 4 are connected to an air conditioner installed on the instrument panel of the vehicle. The rotational position is controlled according to the operating position of a temperature control lever (not shown) on the control panel. The dampers 3 and 4 cause air sent from a blower (not shown) to flow in from the left side of the case 5 in FIG. Air mix damper 3, 4
The ratio of the amount of hot air heated by the heater core 1 to the amount of cold air passing through the bypass paths 6 and 7 is adjusted according to the rotational position of the heater core 1, thereby adjusting the temperature of the air blown into the vehicle interior. In addition, air mix dampers 3 and 4
A resin or iron plate with a sealing material pasted is used.

As mentioned above, the air mix dampers 3 and 4 control the proportion of air passing through the heater core 1 according to the operating position of the temperature control lever, but when setting the maximum cooling capacity, the bypass paths 6 and 7 is completely opened and no air is sent to the heater core 1. At this time, the amount of air that the blower sends into the passenger compartment is affected by the ventilation resistance of the air conditioner.
In the heater core 1 and air mix dampers 3 and 4, ventilation resistance can be reduced if the passage areas A and B of the bypass passages 3 and 4 can be made large. Therefore, in this example, the rotation center 3-a, 4-a side portion of the air mix dampers 3, 4 is bent toward the side surface of the heater core 1, and the rotation center 3 provided at the tip of this bent portion is bent. -a and 4-a are arranged on the side surface of the heater core 1, that is, within the range of the projected area of the heater core 1 in the air flow direction. Further, the seal wall 2- adjacent to the rotation centers 3-a, 4-a
1 and 2-2 are also arranged on the side surface of the heater core 1 so as not to protrude toward the bypass paths 6 and 7.

The warm air guided into the heater core 1 by the air mix dampers 3 and 4 and the cold air that has passed through the bypass paths 6 and 7 are mixed in the mixing chamber 9, and then the various air outlets 10, 11, 12 into the vehicle interior. Switching of each outlet 10, 11, 12 is selected by an outlet switching damper (not shown).

In the above example, the case 5 is made of resin, but it goes without saying that the case 5 may be made of iron plate. Also, due to product dimensional restrictions, etc., the rotation center 3- of both air mix dampers 3, 4 may be
If it is not possible to arrange both dampers a and 4-a on the side of the heater core 1, only the rotation center of one of the dampers may be arranged on the side of the heater core 1.

As explained above, in the automotive air conditioner of the present invention, the rotation center of at least one of the two air mix dampers 3 and 4 and the seal wall adjacent to this rotation center are arranged within the projected area of the heater core in the air flow direction. Since the air mix damper is disposed inside the air mix damper, the area of the bypass passage can be effectively increased when the air mix damper is fully opened, thereby providing an excellent effect of increasing the air volume.

Also, for this reason, it is also possible to use a smaller blower motor. Conversely, it becomes possible to use a larger heater core, and it becomes possible to design a more compact air conditioner with the same air volume.

[Brief explanation of the drawing]

FIG. 1 is a front half-sectional view showing a conventional device, FIG. 2 is a left side view of FIG. 1, FIG. 3 is a front half-sectional view showing an embodiment of the device of the present invention, and FIG. FIG. 1... Heater core, 2-1, 2-2... Seal wall, 3, 4... Air mix damper, 3-a, 4
-a...Air mix damper rotation center, 5...Case.

Claims (1)

[Claims for Utility Model Registration] A case comprising a case forming an air flow path and a heater core disposed within the case to heat the air, and bypass paths for bypassing the heater core and flowing air on both sides of the heater core. In the provided automobile air conditioner, a first air mix damper and a second air mix damper are provided for opening and closing the two bypass paths, respectively, and at least one of the first and second air mix dampers is provided. A bent portion bent toward a side surface of the heater core is formed in a portion on the rotation center side, and a damper rotation center provided at the tip of the bent portion is arranged within a projected area of the heater core in the air flow direction. and a seal wall adjacent to the center of rotation of the air mix damper is disposed within a projected area of the heater core in the air flow direction.