JPH0512213U - Automotive heater unit - Google Patents

Abstract

(57) [Abstract] [Purpose] The diverted wind is directed by the damper to eliminate the temperature difference between the differential temperature and the heat temperature in the differential heat mode in the higher temperature operation range, and in the lower temperature operation range. A temperature difference is set between the vent temperature and the heat temperature in the bilevel mode. [Composition] An inlet 2 is provided on a side wall of the air distribution box 1. The temperature adjusting damper 4 is provided so as to be rotatable about a shaft 3 parallel to the inflow direction of air from the inflow port 2.
The incoming air is split into two. The heater 5 is the damper 4
Heats the incoming air diverted to one side by. On the wall perpendicular to the side wall of the air distribution box 1, three outlets 6, 7, and 8 for a differential, a vent, and a heat are provided.
The surface of the damper 4 opposite to the surface facing the heater 5 is provided with a duct 16 for guiding the inflowing air in a direction perpendicular to the inflowing direction and parallel to the inflowing direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an automobile heater unit.

[0002]

[Prior Art]

 FIG. 5 shows a conventional heater unit for an automobile. In the figure, reference numeral 1 is a ventilation box, and an inlet 2 is provided on its side wall (parallel to the paper surface). Inside the air distribution box 1, a damper 4 having a shaft 3 parallel to the inflow direction of air from the inflow port 2 is provided rotatably around the shaft 3. The damper 4 divides the air flowing in from the inflow port 2 into two. A heater 5 is provided below the damper 4 to heat the air branched downward by the damper 4.

At the diagonally upper portion of the front wall of the air distribution box 1, a defroster outlet 6 for the defroster that blows air toward the inner surface of the windshield (not shown) and a vent outlet that blows air toward the passengers in the front of the vehicle. 7 and are provided. Further, a heat outlet 8 for blowing air toward the feet of the occupant is provided in the lower portion of the front wall of the air distribution box 1 which is inclined. A differential door 9, a vent door 10, and a heat door 11 are provided at the outlets 6, 7, and 8 so as to be rotatable about shafts 12, 13, and 14, respectively.

On the surface of the damper 4 opposite to the surface facing the heater 5, ribs 15 are erected at right angles to the air inflow direction. When the air flowing in from the inflow port 2 hits the side wall and is blown from the differential air outlet 6 or the like as it is, the ribs 15 are biased in the direction perpendicular to the paper surface, so that the inflowing air flows as shown in FIG. Before the colliding with the side wall, a part of the inflowing air is collided with the rib 15 and guided in the direction perpendicular to the inflowing direction, thereby preventing the drift from the outlet 6 or the like.

In this heater unit, the air that has flowed into the air distribution box 1 from the inflow port 2 is vertically divided by the damper 4, and the air that is divided downward is heated by the heater 5 and the air that is divided upward. By being mixed with, the temperature is adjusted to a predetermined temperature and the air is blown from each of the outlets 6, 7, and 8. As shown by the solid line in FIG. 4, the temperature blown out from the vent blower outlet 7 or the differential blower outlet 6 does not change much even when the damper 4 is stood upright, and rises sharply from a standing state to some extent. .. Further, the temperature blown out from the heat outlet 8 rises sharply when the damper 4 is raised, and tends to not rise so much after it rises to some extent. The ventilation modes include a differential mode, a heat mode, a vent mode, a differential heat mode and a bi-level mode.

[0006]

[Problems to be solved by the device]

 The diff mode, the diff heat mode, and the heat mode are mainly used in a higher temperature range, that is, in a state where the damper 4 is standing up. Especially, in the diff heat mode, as shown by a broken line in FIG. A small difference is required. However, in reality, as shown by the solid line in FIG. 4, when the damper 4 is in a standing state to some extent, the differential blowout temperature is small and the heat blowout temperature is large, and the difference between the two becomes large. There was a problem that it did not work very well.

Further, the bi-level mode is mainly used in a low to middle temperature range, that is, in a state where the damper 4 is laid down to some extent, and it is required that the difference between the vent outlet temperature and the heat outlet temperature is large. However, in the conventional heater unit in which the ribs 15 are provided on the damper 4, cold ribs are diffused by the ribs 15, the temperature difference is hard to occur, and the ribs 15 of the damper 4 must be adjusted for each vehicle type. Had a point. The present invention has an object to solve such a problem, and eliminates the temperature difference between the diff temperature and the heat temperature in the diff heat mode in a higher temperature operation range by giving a directivity to the wind diverted by the damper, It is an object of the present invention to provide an automotive heater unit capable of providing a temperature difference between a vent temperature and a heating temperature in a bilevel mode in a low temperature operation range.

[0008]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention enables rotation about an air distribution box, an inlet provided on a side wall of the air distribution box, and an axis parallel to an inflow direction of air from the inlet. A temperature adjusting damper that divides the inflow air into two, a heater that heats the inflow air that is branched to one side by the damper, and a wall that is perpendicular to the side wall of the air distribution box are provided. In a heater unit for an automobile provided with three outlets for a differential, a vent and a heat, inflow air is provided on a surface of the damper opposite to a surface facing the heater, in a direction perpendicular to the inflow direction, and It is provided with a duct that leads parallel to the surface.

[0009]

[Action]

 According to the above configuration, in the high temperature operation range, that is, in the differential heat mode with the damper standing, the outlet of the duct faces the heat outlet. Therefore, the cold air flowing out of the duct is mixed with the warm air passing through the heater and is blown from the heat outlet and the differential air outlet. As a result, there is no temperature difference between the heat temperature and the differential temperature. Also, in the low temperature operation range, that is, in the bilevel mode with the damper lying, the outlet of the duct goes to the vent outlet. Therefore, the cold air flowing out of the duct is blown from the vent outlet without being mixed with the warm air passing through the heater. As a result, a temperature difference occurs between the vent temperature and the heat temperature.

[0010]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an automotive heater unit according to the present invention, which is substantially the same as the conventional heater unit shown in FIG. 5 except that a damper 16 is provided with a duct 16, and corresponding parts have the same reference numerals. It is attached. The ducts 16 are provided on the surface of the damper 4 opposite to the surface facing the heater 5, and as shown in FIG. 2, are formed in three rows along three arcs of 90 ° concentricity. .. The duct 16 guides the inflow air from the inflow port 2 in a direction perpendicular to the inflow direction and parallel to the damper 4.

On the upper surface of the duct 16, ribs 15 for preventing drift are provided upright in the direction perpendicular to the inflow direction, as in the conventional case. The duct 16 may be separately formed and fixed to the damper 4, or may be integrally formed with the damper 4. It is also possible to use a damper 4 which is provided with a groove having a substantially U-shaped cross section and which is covered with a urethane plate.

In the heater unit provided with the duct 16 as described above, as shown in FIG. 3, when the diff heat mode is set in a state where the damper 4 is in a standing state, that is, in a high temperature operation range, the outlet of the duct 16 is slanted. Head to the lower heat outlet 8. In this differential heat mode, the cold air flowing in from the inflow port 2 is split by the damper 4 into the heater side and the duct side. The cool air diverted to the heater side passes through the heater 5, becomes warm air, makes a U-turn upward, and flows toward the differential air outlet 6 and the heat air outlet 8.

The cold air diverted to the duct side is divided into one that passes outside the duct and one that passes inside the duct. The cool air flowing outside the duct flows toward the differential air outlet 6 and the heat air outlet 8. In addition, the cold air that has passed through the duct and flows out from the outlet has a directivity toward the heat outlet 8, and is mixed with the warm air that has passed through the heater 5 to mix with the heat outlet 8 or the differential. The air is blown from the outlet 6. Therefore, the air flowing out from the differential air outlet 6 and the heat air outlet 8 has no temperature difference and is blown at a regulated temperature. As a result, unlike the conventional case, there is no inconvenience that the differential temperature lowers in the differential heat mode and the defroster does not work.

Next, as shown in FIG. 1, when the damper 4 is in a lying state, that is, in the low temperature operation range, when the bilevel mode is set, the outlet of the duct 16 is directed to the vent outlet 7. In this bi-level mode, the cold air diverted to the duct side mainly flows toward the vent outlet 7. Further, the cold air diverted to the heater side passes through the heater 5 to become warm air and travels upward, as in the differential heat mode, but has a directivity toward the vent outlet 8 through the duct. It makes a U-turn downward without exiting the flow of cold air and flows out from the heat outlet 8. Therefore, a temperature difference occurs between the air flowing out from the vent air outlet 7 and the air flowing out from the heat air outlet, and the head cold foot heat is air-conditioned.

Although the rib 15 is provided on the duct 16 in the above-described embodiment, the rib 15 is for preventing uneven flow from the vent outlet 7 and the like, and is not included in the structure of the present invention. It is not absolutely necessary.

[0016]

[Effect of the device]

 As is clear from the above description, according to the present invention, since the directional wind passing through the duct eliminates the temperature difference in the differential heat mode, the disadvantage that the defroster does not work and the window glass becomes cloudy is avoided. .. In addition, since there is a temperature difference in the bi-level mode due to the directional wind, it has the effect of obtaining a comfortable air conditioning condition for cold head heat.

[Brief description of drawings]

FIG. 1 is a sectional view showing a bilevel mode of a heater unit according to the present invention.

FIG. 2 is a perspective view of a damper having a duct.

FIG. 3 is a cross-sectional view showing a differential heat mode of the heater unit shown in FIG.

FIG. 4 is a diagram showing a relationship between a damper angle and an outlet temperature.

FIG. 5 is a sectional view of a conventional heater unit.

FIG. 6 is a perspective view of the damper shown in FIG.

[Explanation of symbols]

1 ... Air distribution box, 2 ... Inlet, 3 ... Shaft,
4 ... Damper, 5 ... Heater, 6 ... Differential outlet, 7 ... Vent outlet, 8 ... Heat outlet, 1
6 ... duct.

Claims (1)

[Scope of utility model registration request] 1. An air distribution box, an inflow port provided on a side wall of the air distribution box, and a rotatably provided shaft around an axis parallel to an inflow direction of air from the inflow port. A temperature control damper that splits the air into two, and a heater that heats the inflowing air that is split into one side by the damper,
A differential provided on the wall perpendicular to the side wall of the air distribution box,
In a heater unit for an automobile having three vents and three outlets for heat, inflow air is provided on a surface of the damper opposite to a surface facing the heater, in a direction perpendicular to the inflow direction, and on the surface. A heater unit for an automobile, which is provided with a duct that leads in parallel.