JPS6322089Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air conditioner, and particularly to an air conditioner for automobiles.

Conventional air conditioners for automobiles include those that have a fixed guide for air mixing installed in the space downstream of the heater core, or those that have two dampers that move so that the air volume is unobstructed during maximum cooling and heating, and that adjust the temperature. In areas where it is necessary, fixed guides that are movable are known.

However, the conventional technology that uses a fixed guide has the disadvantage that the air volume decreases during maximum cooling/heating, and the conventional technology that installs two dampers downstream of the heater core does not adequately adjust the temperature during bilevel mode, which simultaneously blows up and down. In order to solve this problem, it is necessary to additionally install a fixed guide, and this fixed guide has the disadvantage that when mixing hot and cold air in other modes, it is not mixed sufficiently.

The purpose of this invention is to eliminate the above-mentioned drawbacks, to ensure maximum air volume during maximum cooling/heating, to ensure sufficient mixing of cold and warm air in the temperature adjustment area, and to provide appropriate head-chilling and foot-heating effects in bi-level mode, that is, top and bottom blowing. The object of the present invention is to obtain an air conditioner for an automobile that can perform the following steps.

The automotive air conditioner according to the present invention includes a heater core, a damper for temperature control provided on the upstream side of the heater core, a damper for switching a vent and heater outlet provided on the downstream side of the heater core, and a heater core. and a switching damper, and is rotatable between a closed position at an angle to the air flow and an open position approximately parallel to the air flow. A link device that connects the damper, an air mix damper, and a temperature adjustment damper, and a damper that operates the link device only in the bilevel mode in which both the vent outlet and the heater outlet are open, and the damper for temperature adjustment. and a damper for air mixes,
A mode selection device that makes the link device inactive when in a mode other than bilevel mode, and an air mixer when the link device is inactive and the temperature adjustment damper is at the maximum cooling position or maximum heating position with respect to the heater core. An air mixer damper rotating device is provided, which rotates a damper for air mixers to an open position, and a damper for air mixers to a closed position when a damper for temperature adjustment is in a temperature control position relative to the heater core. In the level mode, the mixture of cold air and hot air is reduced, and the cold air and hot air are separately guided to the vent outlet and the heat outlet, respectively, thereby making it possible to keep the head cold and the feet warm.

Next, a preferred embodiment of the automotive air conditioner according to the present invention will be described with reference to the accompanying drawings.

The automotive air conditioner according to the present invention is shown in Figure 1.
As shown in FIGS. 2 and 3, a blower unit 1, a cooler unit 2, and a heater unit 3 are installed.
and has.

The blower unit 1 has a blower 5 driven by a motor 4, and a fresh air intake 6 is provided upstream of the blower 5.
A damper 6 for switching between a and an outside air intake port 6b
is provided.

The cooler unit 2 has an evaporator 7 to cool the air passing therethrough.

The heater unit 3 includes a heater core 8, a temperature control damper 10 that adjusts the proportion of air passing through the heater core 8 and air passing through a bypass passage 9, and an air mixing damper 10 downstream of the heater core 8 and bypass passage 9, respectively. Dampers 11 and 12 are provided facing each other. These dampers 11, 12
are rotatable between closed positions k, m at an angle to the air flow and open positions j, n approximately parallel to the air flow, and the heater core 8
It functions to mix the air that has passed through the bypass passage 9 with the air that has passed through the bypass passage 9, and to direct it as it is to each of the air outlets 13 and 14. The vent outlet 13 and the heater outlet 14 are provided with dampers 13a and 1 for switching the outlet, respectively.
4a is provided.

The air mix dampers 11 and 12 have a second
As shown, small links 15a, 15b are fixed and biased by springs 16a, 16b into the closed position shown. These dampers 11,
12 is a valve 17a, 1 that switches between atmospheric pressure and negative pressure;
Diaphragm actuator 18 communicating with 7b
Link 1 to plates 19a and 19b of a and 18b
5a and 15b, and when the actuators 18a and 18b are ON, the valve 17
Negative pressure is introduced via a, 17b to the plate 1.
9a, 19b are pulled in the direction of the arrow, damper 1
1 and 12 are also opened in the directions of the arrows. Furthermore, when the actuators 18a, 18b are off, atmospheric pressure is introduced through the valves 17a, 17b, and the plates 19a, 19b move in the direction opposite to the arrow. , 12 are closed in the position shown in FIG. In this case, small links 15a, 1
plate 19a, to allow movement of 5b;
A long hole is formed in each of the holes 19b.

Small links 15a, 1 of each damper 11, 12
Link plates 21a and 21b having elongated holes 20a and 20b, respectively, are pivotally attached to the ends of 5b.

Damper 1 for temperature adjustment upstream of heater core 8
A damper operating plate 23 is fixed to the zero shaft 22, and is operated between MAXCOOL and MAXHOT by a temperature control lever (not shown). That is, a pin 24 provided at one end of the plate 23 is connected to a wire 25 leading to the aforementioned temperature control lever.
A pin 26 is provided at the other end of the plate 23 and engages with the elongated hole 20a of the link plate 21a.

A projection 28 having a pin 27 is formed on the plate 23, and a link 30 is pivotally connected to a shaft 29.
is inserted into a long hole (not shown). A pin 31 is provided at the other end of the link 30 and engages with the elongated hole 20b of the link plate 21b.

A substantially V-shaped plate 32 is rotatably mounted on the shaft 22 of the damper 10 for selecting a vent mode, a heat mode, and a bilevel mode. This V-shaped plate 32 is operated by a blow-off switching lever (not shown) connected by a wire 33.

This plate 32 has two cam surfaces 32a, 32
b and a recess 32c formed therebetween.
In the bilevel mode, these cam surfaces 32a, 32b engage with the tips of the link plates 21a, 21b, as shown by broken lines in FIG. 2, and are activated. Therefore, in the bilevel mode shown in FIG. 2, when the damper operating plate 23 is rotated counterclockwise to enlarge the bypass passage 9, the pin 26 moves in the direction of the arrow along the cam surface 32a. Move to. This movement of the pin 26 causes the tip of the link plate 21a to move along the cam surface 32a, and simultaneously pushes the link 15a to the right in FIG. 2 and rotates the damper 11 in the direction of opening. When the pin 26 is further moved and the pin 22, the pin 26, and the link plate 21a are in a straight line, that is, when the pin 26 passes through the hole point, the link plate 21a is pulled to the left again and the damper 11
Rotate in the direction of closing again.

The link plate 21b of the damper 12 is the link 3
Since it is connected to the plate 23 via 0,
The movement of the plate 23 causes almost the same opening and closing movement as the damper 11.

When the V-shaped plate 32 is rotated counterclockwise in FIG. 2 to select the vent or heater mode, the tips of the link plates 21a and 21b are disengaged from the cam surfaces 32a and 32b and become free. In other words, the motion of the plate 23 is not transmitted to the dampers 11 and 12 since the damper is in a non-operating state.

Next, the operation of the illustrated embodiment will be explained in more detail.

First, during maximum cooling, the damper 10 is in the position d in FIG. 1, and the mode selection plate 32
is in the position shown in FIG. The damper 13a of the vent outlet 13 is in the open position f in FIG. 1, and the damper 14a of the heater outlet 14 is in the closed position h. Then, negative pressure is introduced into the diaphragm actuators 18a and 18b, so that the damper 11 is at the j position and the damper 12 is at the open position of n. Therefore, all the cold air that has passed through the evaporator 7 passes through the bypass passage 9, flows freely through the passage opened by the damper 11 moved to the open position without any obstruction, and is blown out from the vent outlet 13. be done.

At maximum heating, the damper 10 is rotated to the position e in FIG.
Negative pressure is introduced into a and 18b, the damper 11 is in the j open position, the damper 12 is in the n open position,
The damper 13a is rotated to the closed position g, and the damper 14a is rotated to the open position i. Thus, the hot air that has passed through the heater core 8 flows freely through the passage opened by the damper 12 moved to the open position without any obstruction and is blown out from the heater outlet 14.

In temperature adjustment areas other than maximum cooling in the vent outlet and maximum heating in the heater outlet, the damper 10 for temperature adjustment upstream of the heater core is located between positions d and e in FIG. 1, and the mode selection plate 32 is in the position shown in FIG. At this time, each diaphragm actuator 18a, 1
8b are respectively turned off and atmospheric pressure is introduced, the pins move in the elongated holes of plates 19a and 19b due to the force of springs 16a and 16b, and each damper 11 and 12 is oriented as shown in FIG. ivy position k, m
This acts as a fixed guide. That is,
The hot air that has passed through the heater core 8 and the cold air that has passed through the bypass passage 9 are thoroughly mixed and then each air outlet 13,
It can lead to 14. In this temperature adjustment region, the blowing temperature can be freely selected by rotating the damper 10 between positions d and e. At this time, plates 23 and 30 are rotated, but plates 21a and 21b are
Since the pins 26 and 31 do not engage with the cam surfaces 32a and 32b of the pins 26 and 31, they move in the respective elongated holes 20a and 20b and do not affect the dampers 11 and 12. Opposing position k,
It is held at m.

In the bi-level mode, the mode selection plate 32 is rotated to the position shown by the broken line in FIG. In this state, when the plate 23 is rotated to adjust the temperature by rotating the damper 10, the plate 23
Since the tips of 1a and 21b are restricted by the cam surfaces 32a and 32b, the pins 26 and 31 cannot move in the elongated holes 20a and 20b, but move along the cam surfaces 32a and 32b. damper 1
1, 12 toward positions j, n, and pins 26,
31 passes the hole point, the dampers 11 and 12 are rotated in the direction of closing again toward positions k and m. That is, when the damper 10 is located at the center of positions d and e, the dampers 11 and 12 are at positions j and n, and at this time the difference between the blowing temperatures of the ducts 13 and 14 becomes maximum, which is shown by the solid line in FIG. It is possible to obtain characteristics such as

In the above embodiment, it is explained that when the damper 10 is at the center position, the dampers 11 and 12 are at positions j and n, but the link device is designed so that they are at positions j' and n'. By doing so, it is possible to obtain the characteristics shown by the broken line in FIG. 4, so it is possible to arbitrarily set the temperature difference by setting the links.

Further, although the description has been made assuming that the diaphragm actuators 18a and 18b are used to operate the dampers 11 and 12, links may be used instead.

As described above, according to the automotive air conditioner according to the present invention, it is possible to obtain the maximum air volume during maximum cooling and maximum heating, and in the temperature adjustment area, cool air and warm air are sufficiently mixed and the temperature can be adjusted freely. Adjustment is possible, and since the damper for temperature adjustment and the damper for air mix are interlocked in the bilevel mode, it is possible to arbitrarily set an appropriate temperature difference between the upper and lower temperatures.

Note that Fig. 3 shows an embodiment of the present invention, and the mounting positions of each part are clearly shown.
It should be noted that this does not indicate the condition of the parts in a particular blowing mode.

[Brief explanation of drawings]

Fig. 1 is a horizontal cross-sectional view of an air conditioner for an automobile according to the present invention, Fig. 2 is an enlarged schematic diagram showing the main parts of the air conditioner for an automobile shown in Fig. 1, and Fig. 3 is the same as that shown in Fig. 2. FIG. 4 is an enlarged perspective view showing the mounting positions of the main parts shown, and FIG. 4 is a temperature adjustment table in the bi-level mode in the embodiment of the present invention. 7... Evaporator, 8... Heater core, 9... Bypass passage, 10, 11, 12... Damper, 13...
...Vent outlet, 14...Heater outlet, 13
a, 14a...Damper, 18a, 18b...Diaphragm actuator, 21a, 21b...Link plate, 23, 32...Plate, 32
a, 32b...Cam surface.

Claims (1)

[Claims for Utility Model Registration] A heater core, a damper for temperature control provided on the upstream side of the heater core, a damper for switching a vent and heater outlet provided on the downstream side of the heater core, and the heater core. and a switching damper, and is rotatable between a closed position at an angle to the air flow and an open position approximately parallel to the air flow. a damper; a link device that connects the air mix damper and the temperature control damper; and a link device that operates the link device only in a bilevel mode in which both the vent outlet and the heater outlet are open. a mode selection device for interlocking a damper for temperature adjustment and a damper for air mixing, and for setting the link device in an inactive state when in a mode other than a bilevel mode; When the damper for air mixer is at the maximum cooling position and the maximum heating position with respect to the heater core, the damper for air mix is rotated to the open position, and when the damper for temperature adjustment is at the temperature adjustment position with respect to the heater core, the damper for air mix is rotated to the open position. A temperature control device for an automobile, comprising an air mix damper rotation device that rotates an air mix damper to a closed position.