JPS6144495Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an air conditioner for an automobile in which a heater core is provided in a heater unit and air temperature is adjusted by opening and closing a mixer door.

Generally, an air conditioner for an automobile is composed of an intake unit 1, a cooler unit 2, and a heater unit 3, as shown in FIG.
The intake unit 1 has a built-in fan 5 driven by a motor 4, and further includes an inside air inlet 6 into which the circulation flow into the vehicle interior flows, an outside air intake 7 into which outside air flows, and an inside air inlet 6 and an outside air intake 7. The intake unit 1 is provided with an outlet 8 through which air sucked in from one or both of the two is sent out by the fan 5. Further, an intake door 9 is installed inside the intake unit 1 in order to control the air flowing into the intake unit 1 through the inside air inlet 6 and the air flowing through the outside air intake 7. intake door 9
moves to the A position where the inside air inlet 6 is closed, the C position where the outside air intake port 7 is closed, and the B position between these.

The cooler unit 2 into which air from the intake unit 1 flows is formed with an inlet 10 connected to the outlet 8 of the intake unit, and the refrigerant from the refrigerant conduit 11 of the cooling circuit passes through the expansion valve 11a. An evaporator (evaporator) 12 into which the air flows under reduced pressure is built in, and heat is exchanged with the air refrigerant from the intake unit 1 in this evaporator. The outlet 13 of the cooler unit 2 is connected to the inlet 14 of the heater unit 3, and the air cooled within the cooler unit 2 flows into the heater unit 3.

Inside the heater unit 3 is a heater core 1 into which engine cooling water flows through a hot water tank 15a in order to heat the air that has flowed into the heater unit.
In the heater unit 3, a mix door 16 is installed upstream of the heater core 15 to adjust the amount of air flowing into the heater core 15 and the amount of air bypassing the heater core. This mix door 16 is in the open position (F position),
By actuating the closed position (D position) or any intermediate position between these, e.g. E position,
All the air that has flowed into the heater unit 3 is sent into the vehicle interior through the heater core 16,
It is possible to send some air directly into the passenger compartment without passing through it, or to send some air through the heater core 15 and other air without passing it through the heater core 15 and then mix it and send it into the passenger compartment, or to send it without mixing. I have to.

A mixing chamber 17 is formed downstream of the heater core 15, and the mixing chamber 17 includes a differential duct 18 for guiding air from the heater unit and blowing it out along the inner surface of the windshield, and a differential duct 18 for blowing air out from the heater unit along the inner surface of the windshield. A floor duct 19 for blowing air toward the driver's seat and a vent duct 20 for sending air into the vehicle interior from a center ventilator (not shown) assembled to the instrument panel in front of the driver's seat are open. Furthermore, as shown in FIG. 2, there are a differential door 21 for controlling the air distribution of the differential duct 18, a vent door 20 for controlling the air distribution to the vent duct 20, and a floor duct 19.
A floor door 23 is installed inside the heater unit 3 for controlling air distribution to the heater unit 3.

The air conditioner is set to each mode by opening and closing these various doors. That is, in the cooler mode, the vent door 22 is fully opened, and the differential door 21 and floor door 23 are fully closed, and in the bi-repel mode, the vent door 22 and floor door 23 are partially opened, and the differential door 21 is fully closed. Furthermore, in the heater mode, the vent door 2
2 is fully closed, the floor door 23 is fully opened, and the differential door 21 is half open. Further, the differential door 21 may be fully closed. Further, in the differential mode, the vent door 22 and the floor door 23 are fully closed, and the differential door 21 is fully opened.

However, in the conventional air conditioner for an automobile as described above, when the mixer door 16 is set at an intermediate position as shown at E in FIG. Go straight to the side and go to Mix Door 1
The cold air that has passed through the lower surface of the heater core 15 passes diagonally downward to the right and becomes warm air, and then the main flow goes straight to the mixing chamber side along the bottom of the casing of the heater unit 3, so that the cold and hot air in the mixing chamber is The drawback was that the mixing was not sufficient.

The purpose of this invention is to sufficiently mix the warm air that passes through the heater core to the mixing chamber and the cold air that passes directly to the mixing chamber without passing through the heater core. The heater core is tilted and installed in the heater unit so that one side of the heater core on the side is close to the casing of the heater unit, and the other side of the heater core is located on the center side of the heater unit. a first mix door that controls the amount of air that flows from the inlet and reaches the mixing chamber without passing through the heater core; and a first mix door that controls the amount of air that flows from the inlet and passes through the heater core and reaches the mixing chamber. The second mix door is attached to the shaft adjacent to the inner surface of the casing.

Next, an embodiment of the present invention shown in FIGS. 3 to 5 will be described. In Figs. 3 to 5, parts common to Figs. 1 and 2 are given the same reference numerals, and in particular, the structures of the intake unit 1 and cooler unit 2 are the same as those of the prior art shown in Figs. 1 and 2. For every,
Their explanation will be omitted.

The air flowing into the heater unit 3 from the cooler unit 2 flows into the mixing chamber 1 downstream from the inlet 14.
It flows towards 7. As in the case shown in FIG. 1, one side surface 15C of the heater core 15 on the upstream side of the incoming air is close to the casing 3a of the heater unit 3, and the other side surface 15b of the heater core 15 is close to the center of the heater unit 3. It is installed at an angle so that it is located on the side of the building. Inside the heater unit 3, there is a mix door 16a that controls the amount of air that flows in from the inlet 14 and reaches the mixing chamber 17 without passing through the heater core 15;
A second mix door 16b controls the amount of air flowing from the heater core 15 to the mixing chamber 17.
are installed respectively. The first mix door 16a and the second mix door 16b are connected to shafts 24 and 25 provided in the heater unit 3 adjacent to the inner surface of the casing 3a of the heater unit 3, respectively.
installed on. The first mix door 16a rotates to a fully open position G, a fully closed position H, and any position in between, for example, the J position. The second mix door 16b rotates in conjunction with the first mix door 16a to a fully closed position, a fully open position L, and any position in between, for example, the M position. The rotation shaft 25 is connected to the other side surface 15 of the heater core 15 as shown in the figure.
b, and as shown in FIG. 4, when the first and second mix doors 16a, 16b are at approximately intermediate positions, the two mix doors 16a, 16b form a substantially V-shape. Become.

The first and second mix doors 1 shown in solid lines in Figure 3
The positions 6a and 16b indicate the state in which the vehicle interior is cooled to the maximum, with the first mix door 16a in the fully open position G and the second mix door 16b in the fully closed position K. FIG. 4 is a diagram showing the case where the first and second mix doors 16a, 16b are respectively set at approximately intermediate positions, and the cold air that reaches the mixing chamber 17 without passing through the heater core 15 and the warm air that passes through the heater core are mixer doors 16a, 16
They are guided to collide by b and are mixed here.

FIG. 5 shows the first mix door 16a in the fully closed position H.
This shows a state where the second mix door 16b is in the fully open position L and maximum heating is being performed.

6 and 7 are diagrams showing other embodiments of the present invention. Figure 6 shows the two mix doors 1 shown in Figure 7.
6a, 16b is a diagram showing a template lever 26 for opening and closing control, and this template lever is A to D.
It operates between. And template lever 2
6 is in the D position, which corresponds to FIG. 5 in the embodiment described above, and the mix doors 16a, 16b are in the maximum heating state. The B position of the template lever 26 corresponds to the position of the mixer doors 16a, 16b in the embodiment described above as shown by the solid line in FIG. 3, and the second mixer door 16b is in a fully closed state. In addition to this, in the embodiment shown in FIGS. 6 and 7, a maximum cooling portion is provided between A and B, and when the template lever 26 is set at the A position,
First mix door 16a and second mix door 16
b are both fully open. During this period, when the template lever 26 is positioned, the hot water pot 15a is fully closed so that the supply of hot water to the heater core 15 is stopped.

This allows the flow from the inlet 14 to the heater unit 3.
Since the air flowing into the heater unit 3 passes through the entire heater unit 3 and reaches the interior of the vehicle, the ventilation resistance of the air flowing through the heater unit 3 during maximum cooling is greatly reduced.

As described above, according to the present invention, one side surface of the heater core on the upstream side of the inflow air from the inlet is close to the casing of the heater unit, and the other side surface of the heater core is close to the central part of the heater unit. a first mix door installed in the heater unit with the heater core tilted so that the heater core is located at the inlet, and controlling the amount of air that flows in from the inlet and reaches the mixing chamber without passing through the heater core; A second mixer door for controlling the amount of air flowing from the casing through the heater core and reaching the mixing chamber is attached to the shaft adjacent to the inner surface of the casing, so that cold air and warm air are separated when the temperature is not at maximum cooling or maximum heating. When mixing the air with air and discharging appropriately heated air into the vehicle interior, the cold air is guided to the first mix door, and the warm air is guided to the second mix door and sent into the mixing room, where the warm air and cold air collide. This resulted in a good mix of cold and warm air.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of a conventional air conditioner for an automobile, Fig. 2 is a -sectional view of Fig. 1, Fig. 3 is a longitudinal cross-sectional view of an air conditioner for an automobile according to the present invention, and Fig. 4 is a cold air conditioner. FIG. 5 is a vertical cross-sectional view of the heater unit showing the collision state with warm air, FIG. 5 is a vertical cross-sectional view of the heater unit showing the maximum heating state, and FIG. 6 is a front view showing the template lever according to another embodiment of the present invention. 7 are longitudinal sectional views showing the heater unit in the maximum cooling state by operating the template lever shown in FIG. 6. 1... Intake unit, 2... Cooler unit, 3... Heater unit, 12... Evaporator, 14... Inflow port, 15... Heater core, 1
6a...first mix door, 16b...second mix door.

Claims (1)

[Scope of utility model registration request] In the automobile air conditioning system, an air inlet is formed at one end of a heater unit, a heater core is mounted in the heater unit near the inlet, and a mixing chamber is provided at the other end of the heater unit. The heater core is tilted so that one side surface of the heater core on the upstream side of the inflow air from the inflow port is close to the casing of the heater unit, and the other side surface of the heater core is located on the center side of the heater unit. a first mix door installed in the heater unit to control the amount of air that flows in from the inlet and reaches the mixing chamber without passing through the heater core; A second mixer door for controlling the amount of air reaching the room is attached to a shaft adjacent to the inner surface of the casing.