JPH0525287Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The present invention relates to an air conditioner for an automobile, and is particularly designed to clear fog from side windows and improve temperature control characteristics inside the vehicle. This is what I did.

(Prior Art) Generally, as is well known, an air conditioner for an automobile has an intake unit, a cooler unit, and a heater unit, and air introduced from the intake unit is cooled in the cooler unit. After being heated again in the heater unit to a predetermined temperature, it is blown out into the passenger compartment from various outlets provided in the heater unit.

As shown in FIGS. 3 and 4, this heater unit has a heater core 2 built into a heater case 1 into which engine cooling water flows.
A mix door 4 is installed on the upstream side of the heater core 2 to adjust the ratio between the amount of air passing through the heater core 2 and the amount of air passing through the bypass passage 3.

When the mixer door 4 is opened, closed, or rotated to any intermediate position, all of the air that has flowed into the heater case 1 passes through the heater core 2 and is turned into warm air, which is then sent into the passenger compartment. Alternatively, some of the air may be passed through the bypass passage 3 and the other air may be passed through the bypass passage 3, and then mixed in the mixing chamber 5 to form a predetermined amount. After reaching the temperature, the air is selectively passed through multiple ducts and blown into the passenger compartment.

Furthermore, on the downstream side of the heater core 2, a differential opening 6 that communicates with a differential duct (not shown) that distributes air toward the inner surface of the windshield is provided on the top wall 1a of the heater case 1 on the bypass passage 3 side. There is. Further, a foot opening 7 communicating with a foot duct 8 that distributes air toward the occupant's feet is provided in the bottom wall 1b of the heater case 1 on the heater core 2 side. Furthermore, a vent port 9 communicating with a vent duct that distributes air toward the upper body of the occupant is provided in the side wall 1c of the heater case 1 on the side of the bypass passage 3.

This vent port 9 is connected to a center vent chamber 1 which distributes air toward the center of the vehicle interior through a partition plate 10.
A side vent chamber 1 having a sensor vent port 9a communicating with the side vent chamber 1 and side vent ducts 12l and 12r distributing air toward the inner surfaces of the left and right side windows.
2 and a side vent port 9b communicating with the vent port 9b.

The selection of each air conditioning mode is performed by each door 6 provided at each of these air outlets 6, 7, 9a, 9b.
This is done by selectively opening and closing air conditioners a, 7a, 9c, and 9d, and in order to realize each air conditioning mode, cold air or hot air flows out from a desired outlet.

Selection of such a mode is performed by operating a control lever or the like provided on an instrument panel in the vehicle interior.

For example, in the heater mode for heating,
The differential door 6a opens slightly, the foot door 7a opens, and the center vent door 9c and side vent door 9d close. In the vent mode for cooling, the differential door 6a is closed, the foot door 7a is closed,
Center vent door 9c and side vent door 9d
is open, and in the case of a differential mode in which the windshield is defogged, the differential door 6a is open, the foot door 7a is closed, and the center vent door 9c and side vent door 9d are closed.

However, in recent years, an increasing number of cars are equipped with door mirrors, and when heating the left and right side windows, hot air is blown onto the left and right side windows to prevent the glasses from fogging up, thereby improving rearward visibility through the door mirrors. I needed to.

Therefore, in the conventional automobile air conditioner, in the heater mode state, when clearing the fog on the side glass, the differential door 6a opens slightly, the foot door 7a opens, the center vent door 9c closes, and the side vent door 9d opens. It is becoming like this. As a result, the hot air that has passed through the heater core 2 and the cold air that has passed through the bypass passage 3 are mixed in the mixing chamber 5 to become warm air at a predetermined temperature, and the air is heated at the side vent port 9.
b and flows into the side vent chamber 12. This hot air is blown out onto the inner surfaces of the left and right side windows from left and right side vent ducts 12l and 12r communicating with the side vent chamber 12 (see, for example, Japanese Utility Model Application Publication No. 59-89719).

(Problems to be Solved by the Invention) However, it is clear from FIG. Extract the air from the left and right side vent ducts 12l and 12r,
When clearing the fog from the side glass, the cold air (indicated by the broken line arrow) that has passed through the bypass passage 3 is not sufficiently mixed with the warm air that has passed through the heater core 2 in the mixing chamber 5, and instead flows into the bypass passage 3 side of the unit case 1. tended to flow into the side vent port 9b along the side wall 1c. When this happens, the left and right side vent ducts 12l, 1
The air blown out from 2r has a significantly lower temperature than the air blown out from the foot duct 8, and the fog on the side glass cannot be cleared quickly.
In addition, passengers should use the side vent duct 1 on the window side.
Since the occupant will be exposed to the low temperature air from 2l and 12r and the warm air from the foot duct 8 on the passenger compartment side, there is a possibility that the temperature adjustment characteristics will be different between the left and right sides of the occupant's body.

Here, in order to improve the temperature characteristics of the air blown out from the side vent ducts 12l and 12r,
Side vent ducts 12l, 1 are installed via bypass ducts and bypass doors for opening and closing them.
A configuration in which hot air is allowed to flow down 2r is also conceivable. However, if such a configuration is adopted, separate parts such as a bypass duct and a bypass door must be additionally provided, which is disadvantageous in terms of component costs and assembly man-hours.

In order to improve the temperature characteristics of the side vent wind while suppressing increases in cost and man-hours, it is essential to eliminate the addition of separate parts as much as possible.

Therefore, the present invention was devised in order to solve the drawbacks and problems associated with the above-mentioned conventional technology, and it is possible to quickly clear the fog from the side glass without adding additional parts. To provide an air conditioner for an automobile in which air blown out from a side vent duct has as little temperature difference as possible compared to air blown out from a foot duct.

[Structure of the invention] (Means for solving the problem) In order to achieve the above object, the present invention includes: a heater core provided in a heater case so as to have a bypass passage; and an amount of air flowing through the heater core. a rotatable mixer door that adjusts the ratio of the amount of air flowing through the bypass passage and the amount of air flowing through the bypass passage; a mixing chamber that mixes the warm air that has passed through the heater core and the cold air that has passed through the bypass passage; and the air in the mixing chamber. a differential opening opened in the heater case to take out the air, a foot opening, a vent opening, and a foot duct communicating with the foot opening, and the vent opening distributes air toward the center of the vehicle interior. The center vent port is divided into a center vent port that communicates with a center vent chamber where air is distributed, and a side vent port that communicates with a side vent chamber that is connected to a side vent duct that distributes air toward the inner surfaces of the left and right side windows. In an air conditioner for an automobile, which is rotatably provided with a center vent door that opens and closes a vent port, of the side walls of the heater case that form the bypass passage with the heater core, a bottom wall of the heater case and a bottom wall of the heater case form the bypass passage with the heater core. forming the side vent port in a position adjacent to the side vent port; forming a second foot port in direct communication between the mixing chamber and the foot duct in a position of the bottom wall adjacent to the side vent port; A sub-door having a rotary door shape, in which each of the axially parallel end sides of a blocking portion having an arcuate cross-section about the axis is joined to the rotation shaft across a guide hole, is rotatably connected to the second The subdoor is provided at the foot opening, and when in the heater mode, the subdoor blocks communication between the mixing chamber and the side vent chamber by the blocking portion, and connects the second foot opening and the side vent opening to the guide hole. Rotate to a position where it communicates through the
The conditioned air flowing into the foot duct is guided to the side vent chamber, and in the vent mode, communication between the mixing chamber and the foot duct is cut off by the blocking part, and the side vent opening is rotated to a position where the side vent opening is opened. The air conditioner for an automobile is characterized in that conditioned air in the mixing chamber is guided to the side vent chamber.

(Function) In the heater mode, the subdoor blocks communication between the mixing chamber and the side vent chamber by the blocking portion, and rotates to a position where the second foot opening and the side vent opening communicate with each other through the guide hole. . Since communication between the mixing chamber and the side vent chamber is blocked by the blocking portion of the subdoor, the cold air that has passed through the bypass passage does not flow directly into the side vent chamber. The cold air that has passed through the bypass passage is sufficiently mixed with hot air in the mixing chamber to become hot air at a predetermined temperature, and then flows into the foot duct. The conditioned air that has flowed into the foot duct is blown out into the vehicle interior through this foot duct, and is also led to the side vent chamber through the guide hole of the sub door, the second foot opening, and the side vent opening, and then through the side vent duct. Air is distributed towards the inner surfaces of the left and right side windows. Therefore, warm air with approximately the same temperature as the conditioned air flowing down to the foot duct is blown out from the side vent duct, which clears the fog on the side windows and also causes differences in the temperature regulation characteristics of the left and right sides of the occupant's body. do not have.

In the vent mode, the subdoor is rotated to a position where the blocking portion blocks communication between the mixing chamber and the foot duct and opens the side vent port.
The cold air is mixed with warm air to become cold air at a predetermined temperature, and flows from the mixing chamber into the side vent chamber through the side vent port, and the cold air is blown out from the left and right side vent ducts. .
Further, since communication between the mixing chamber and the foot duct is blocked by the blocking portion of the subdoor, the cold air does not flow down to the foot duct.

(Example) Hereinafter, the present invention will be explained with reference to an example shown in the drawings.

Note that the same reference numerals in the drawings are given to parts common to those of the conventional automobile air conditioner shown in FIGS. 3 and 4.

FIG. 1 is a cross-sectional view of the main parts of an automobile air conditioner according to an embodiment of the present invention, and FIG.
FIG. 2 is a schematic perspective view showing a subdoor used in this embodiment.

To give an overview of this automotive air conditioner, the first
As shown in the figure, a second
The foot opening 20 is opened, and this second foot opening 20
A sub door 21 is rotatably provided for opening and closing the side vent port 9b and for guiding the warm air flowing into the foot duct 8 into the side vent chamber 12.

More specifically, the side vent port 9b communicating with the side vent chamber 12 is connected to the bottom wall 1b in which the foot port 7 is formed of the side wall 1c of the heater case 1 that forms the bypass passage 3 with the heater core 2. It is formed in a position close to. Furthermore, the bottom wall 1b
A second foot opening 20 that directly communicates the mixing chamber 5 and the foot duct 8 is formed at a position adjacent to the side vent opening 9b. This second
The foot opening 20 is located downstream of the foot duct 8 with respect to the foot opening 7.

As described above, since the second foot opening 20 and the side vent opening 9b are provided close to each other,
The positional relationship between the second foot opening 20 and the side vent opening 9b makes it easy for a portion of the warm air that has flowed into the foot duct 8 to flow out of the second foot opening 20 and into the side vent chamber 12 through the side vent opening 9b. It has to do with location.

As shown in FIG. 2, the subdoor 21 is a type of rotary door, and has a rotation axis and a blocking part 23 having an arcuate cross section around the rotation axis. Each of the end sides parallel to is joined to the rotation shaft with guide holes 22, 22 in between. Ribs 24 and 25 that engage with the bottom wall 1b in response to rotation are provided on the end sides of the blocking portion 23 so as to protrude radially outward beyond the blocking portion 23. As shown in FIG. 1, the rotation axis of the subdoor 21 is arranged at the corner of the bottom wall 1b and the side wall 1c. The sub door 21 has its blocking part 2
3 is selectively set to either a first stop position in which it moves into the mixing chamber 5 as shown by the symbol A in the figure, or a second stop position in which it moves into the foot duct 8 as shown in the figure B. Rotate to. 2nd foot opening 2
0 has an opening area that does not interfere with the movement of the blocking portion 23 of the subdoor 21 into and out of the foot duct 8.

As shown by the solid line in FIG.
When rotated to the stop position A, the rib 24 contacts the side wall 1c so as to cover the side vent port 9b, and the rib 25 contacts the bottom wall 1b at the edge of the second foot port 20.
engage with. In this first stop position, communication between the mixing chamber 5 and the side vent chamber 12 is blocked by the blocking part 23 of the sub door 21, and the communication between the mixing chamber 5 and the side vent chamber 12 is interrupted by the blocking part 23 and the guide holes 22, 22. , second foot opening 20 and side vent opening 9b
are communicated. As a result, a portion of the warm air within the foot duct 8 is guided to the side vent chamber 12.

On the other hand, when the subdoor 21 rotates to the second stop position B as shown by the dashed line in FIG. 8 and comes into contact with the side surface 8a of 8. At this second stop position, the communication between the mixing chamber 5 and the foot duct 8 and the communication between the side vent chamber 12 and the foot duct 8 are prevented by the blocking portion 23 of the sub door 21.
In the state where the mixing chamber 5 and the side vent chamber 12 are blocked, the side vent port 9b is opened and the mixing chamber 5 and the side vent chamber 12 are communicated with each other. Thereby, the air in the mixing chamber 5 is guided to the side vent chamber 12.

The air conditioning mode of an automotive air conditioner can be broadly divided into a heater mode for heating and a vent mode for cooling.
In the heater mode, it rotates to a first stop position A where the second foot opening 20 is opened, and in the vent mode, it rotates to a second stop position B where the second foot opening 20 is closed.

Next, the operation of this embodiment will be explained.

In the heater mode state, to defog the side glass, the differential door 6a is slightly opened, the foot door 7a is opened, the center vent door 9c is closed, and the sub door 21 is at the first stop position A where the second foot opening 20 is opened. Become. The sub door 21 is at the first stop position A
By rotating the mixing chamber 5 and the side vent chamber 12, the communication between the mixing chamber 5 and the side vent chamber 12 is interrupted by the blocking part 23 of the subdoor 21, and the second foot opening 20 and the side vent opening 9b are communicated with each other through the guide holes 22, 22. be done.

As a result, the warm air flowing through the heater core 2,
The cold air flowing through the bypass passage 3 is mixed in the mixing chamber 5, becomes warm air at a predetermined temperature, flows into the foot opening 7, and is blown out from the foot duct 8 into the vehicle interior. At this time, communication between the mixing chamber 5 and the side vent chamber 12 is blocked by the blocking portion 23 of the subdoor 21, so the cold air that has passed through the bypass passage 3 does not directly flow down to the side vent chamber 12.

Further, a part of the warm air flowing through the foot duct 8 is transferred to the side vent port 9 through the guide hole 22 of the sub door 21 provided in the second foot port 20.
b and flows into the side vent chamber 12. Then, this hot air is blown out from the side vent ducts 12l, 12r communicating with the side vent chamber 11 onto the inner surfaces of the left and right side windows so as to clear the fog on the side windows.

In this case, as shown in FIG. 5, the hot air flowing down into the side vent chamber 12 is the same as the hot air that is sufficiently mixed in the mixing chamber 5 or the foot duct 8 and blown out from the foot duct 8 into the passenger compartment, so it takes a long time. Although there is a slight temperature drop while flowing down the side vent ducts 12l and 12r, almost the same warm air as the warm air blown into the vehicle interior from the foot duct 8 is blown toward the side glass. This ensures that the fog on the side windows can be cleared. Furthermore, since the temperatures of the foot wind and the side vent wind are almost the same, the temperature control characteristics for the left and right sides of the occupant's body are also good.

Next, in the case of vent mode, the differential door 6a is closed, the foot door 7a is closed, and the center vent door 9c is closed.
is opened, and the subdoor 21 enters the second stop position B where the second foot opening 20 is closed. Sub door 21 is the second
By rotating to the stop position B, communication between the mixing chamber 5 and the foot duct 8 is interrupted by the blocking part 23, and the side vent port 9b is opened.

As a result, the warm air that has passed through the heater core 2 and the cold air that has passed through the bypass passage 3 are mixed in the mixing chamber 5 and flow into the center vent chamber 11 and the side vent chamber 12 as cold air at a predetermined temperature. The air will be blown out into the center of the room and inside the left and right side windows. Further, since the communication between the mixing chamber 5 and the foot duct 8 is blocked by the blocking part 23 of the sub door 21, the cold air in the mixing chamber 5 flows through the foot duct 8.
It will not flow down.

As described above, the automotive air conditioner of this embodiment improves the temperature characteristics of the side vent air by increasing the temperature of the side vent air to the foot air temperature.
This can be achieved by simply forming the second foot opening 20 on the bottom wall 1b of the heater case and replacing the conventional side vent door 9d with a subdoor 21 having a rotary door shape. Therefore, there is no need to additionally provide separate parts such as a bypass duct and a bypass door for opening and closing the bypass duct, and an increase in parts cost can be suppressed, and the number of assembly steps does not increase. In addition, in this embodiment, the warm air flowing into the vent duct 8 is branched and flows into the side vent chamber 11, and the left and right side vent ducts 12
Since the hot air is blown out from l and 12r, the temperature balance between the left and right hot air is extremely good.

[Effects of the invention] As described above, according to the invention, the hot air inside the foot duct is blown out from the side vent duct in the heater mode without adding any separate parts, and this hot air You can quickly clear the fog on the side windows. Also,
The temperature control characteristics for the left and right sides of the occupant's body are excellent. Moreover, in the vent mode, the cold air from the mixing chamber is blown out from the side vent duct as before, which has a great practical effect of providing an automobile air conditioner that provides a more comfortable interior space. obtain.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a main part showing an air conditioner for an automobile according to an embodiment of the present invention, FIG. 2 is a schematic perspective view showing a subdoor used in this embodiment, and FIG.
The figure is a schematic perspective view showing a conventional air conditioner for an automobile, FIG. 4 is a sectional view of a main part taken along the line - in FIG. 3, and FIG. 5 is an explanation showing the temperature characteristics of an air conditioner for an automobile. It is a diagram. 1...Heater case, 1b...Bottom wall, 1c...
Side wall, 2... heater core, 3... bypass passage,
4... Mixture door, 5... Mixing chamber, 6... Differential port, 7... Foot port, 8... Foot duct, 9...
...Vent port, 9a... Center vent port, 9b...
Side vent port, 11... Center vent chamber, 12
...Side vent chamber, 12l, 12r...Side vent duct, 20...Second foot opening, 21...
Sub door, 22... guide hole, 23... blocking section.

Claims (1)

[Claims for Utility Model Registration] A heater core 2 provided with a bypass passage 3 in a heater case 1, and adjusting the ratio of the amount of air flowing through the heater core 2 and the amount of air flowing through the bypass passage 3. a mixing chamber 5 that mixes the hot air flowing through the heater core 2 and the cold air flowing through the bypass passage 3;
A differential port 6, a foot port 7, a vent port 9, which are provided in the heater case 1 to take out the air in the mixing chamber 5, a foot duct 8 communicating with the foot port 7,
A center vent port 9a that communicates the vent port 9 with a center vent chamber 11 that distributes air toward the center of the vehicle interior, and a side vent duct 12l that distributes air toward the inner surfaces of left and right side windows. 12
and a side vent port 9b communicating with a side vent chamber 12 to which the air conditioner r is connected, and a center vent door 9c rotatably provided to open and close the divided center vent port 9a. , the bypass passage 3 between the heater core 2 and the heater core 2;
The side vent port 9b is formed at a position close to the bottom wall 1b of the heater case 1 among the side wall 1c of the heater case 1 forming a
A second foot opening 20 that directly communicates the mixing chamber 5 and the foot duct 8 is formed in a position adjacent to the opening, and an end side parallel to the axial direction of the blocking portion 23 having an arcuate cross section centered on the rotation axis. A sub-door 21 having a rotary door shape is rotatably provided in the second foot opening 20, each of which is connected to the rotation shaft with guide holes 22, 22 in between, and the sub-door is in the heater mode. , the communication between the mixing chamber 5 and the side vent chamber 12 is cut off by the blocking part 23, and the second foot opening 20 and the side vent opening 9b are placed in communication through the guide holes 22, 22. The conditioned air flowing into the foot duct 8 is transferred to the side vent chamber 12.
In the vent mode, communication between the mixing chamber 5 and the foot duct 8 is cut off by the blocking part 23, and the side vent port 9b is rotated to a position where the side vent port 9b is opened, thereby discharging the conditioned air in the mixing chamber 5. An air conditioner for an automobile characterized in that air is introduced into the side vent chamber 12.